Statistics
| Branch: | Revision:

ffmpeg / libavcodec / h264.c @ aebb5d6d

History | View | Annotate | Download (310 KB)

1
/*
2
 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
/**
23
 * @file h264.c
24
 * H.264 / AVC / MPEG4 part10 codec.
25
 * @author Michael Niedermayer <michaelni@gmx.at>
26
 */
27

    
28
#include "dsputil.h"
29
#include "avcodec.h"
30
#include "mpegvideo.h"
31
#include "h264.h"
32
#include "h264data.h"
33
#include "h264_parser.h"
34
#include "golomb.h"
35
#include "rectangle.h"
36

    
37
#include "cabac.h"
38
#ifdef ARCH_X86
39
#include "i386/h264_i386.h"
40
#endif
41

    
42
//#undef NDEBUG
43
#include <assert.h>
44

    
45
/**
46
 * Value of Picture.reference when Picture is not a reference picture, but
47
 * is held for delayed output.
48
 */
49
#define DELAYED_PIC_REF 4
50

    
51
static VLC coeff_token_vlc[4];
52
static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2];
53
static const int coeff_token_vlc_tables_size[4]={520,332,280,256};
54

    
55
static VLC chroma_dc_coeff_token_vlc;
56
static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2];
57
static const int chroma_dc_coeff_token_vlc_table_size = 256;
58

    
59
static VLC total_zeros_vlc[15];
60
static VLC_TYPE total_zeros_vlc_tables[15][512][2];
61
static const int total_zeros_vlc_tables_size = 512;
62

    
63
static VLC chroma_dc_total_zeros_vlc[3];
64
static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2];
65
static const int chroma_dc_total_zeros_vlc_tables_size = 8;
66

    
67
static VLC run_vlc[6];
68
static VLC_TYPE run_vlc_tables[6][8][2];
69
static const int run_vlc_tables_size = 8;
70

    
71
static VLC run7_vlc;
72
static VLC_TYPE run7_vlc_table[96][2];
73
static const int run7_vlc_table_size = 96;
74

    
75
static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
76
static void svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
77
static void filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
78
static void filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
79
static Picture * remove_long(H264Context *h, int i, int ref_mask);
80

    
81
static av_always_inline uint32_t pack16to32(int a, int b){
82
#ifdef WORDS_BIGENDIAN
83
   return (b&0xFFFF) + (a<<16);
84
#else
85
   return (a&0xFFFF) + (b<<16);
86
#endif
87
}
88

    
89
static const uint8_t rem6[52]={
90
0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
91
};
92

    
93
static const uint8_t div6[52]={
94
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
95
};
96

    
97
static const int left_block_options[4][8]={
98
    {0,1,2,3,7,10,8,11},
99
    {2,2,3,3,8,11,8,11},
100
    {0,0,1,1,7,10,7,10},
101
    {0,2,0,2,7,10,7,10}
102
};
103

    
104
static void fill_caches(H264Context *h, int mb_type, int for_deblock){
105
    MpegEncContext * const s = &h->s;
106
    const int mb_xy= h->mb_xy;
107
    int topleft_xy, top_xy, topright_xy, left_xy[2];
108
    int topleft_type, top_type, topright_type, left_type[2];
109
    const int * left_block;
110
    int topleft_partition= -1;
111
    int i;
112

    
113
    top_xy     = mb_xy  - (s->mb_stride << FIELD_PICTURE);
114

    
115
    //FIXME deblocking could skip the intra and nnz parts.
116
    if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[top_xy]) && !FRAME_MBAFF)
117
        return;
118

    
119
    /* Wow, what a mess, why didn't they simplify the interlacing & intra
120
     * stuff, I can't imagine that these complex rules are worth it. */
121

    
122
    topleft_xy = top_xy - 1;
123
    topright_xy= top_xy + 1;
124
    left_xy[1] = left_xy[0] = mb_xy-1;
125
    left_block = left_block_options[0];
126
    if(FRAME_MBAFF){
127
        const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
128
        const int top_pair_xy      = pair_xy     - s->mb_stride;
129
        const int topleft_pair_xy  = top_pair_xy - 1;
130
        const int topright_pair_xy = top_pair_xy + 1;
131
        const int topleft_mb_frame_flag  = !IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
132
        const int top_mb_frame_flag      = !IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
133
        const int topright_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
134
        const int left_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
135
        const int curr_mb_frame_flag = !IS_INTERLACED(mb_type);
136
        const int bottom = (s->mb_y & 1);
137
        tprintf(s->avctx, "fill_caches: curr_mb_frame_flag:%d, left_mb_frame_flag:%d, topleft_mb_frame_flag:%d, top_mb_frame_flag:%d, topright_mb_frame_flag:%d\n", curr_mb_frame_flag, left_mb_frame_flag, topleft_mb_frame_flag, top_mb_frame_flag, topright_mb_frame_flag);
138
        if (bottom
139
                ? !curr_mb_frame_flag // bottom macroblock
140
                : (!curr_mb_frame_flag && !top_mb_frame_flag) // top macroblock
141
                ) {
142
            top_xy -= s->mb_stride;
143
        }
144
        if (bottom
145
                ? !curr_mb_frame_flag // bottom macroblock
146
                : (!curr_mb_frame_flag && !topleft_mb_frame_flag) // top macroblock
147
                ) {
148
            topleft_xy -= s->mb_stride;
149
        } else if(bottom && curr_mb_frame_flag && !left_mb_frame_flag) {
150
            topleft_xy += s->mb_stride;
151
            // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
152
            topleft_partition = 0;
153
        }
154
        if (bottom
155
                ? !curr_mb_frame_flag // bottom macroblock
156
                : (!curr_mb_frame_flag && !topright_mb_frame_flag) // top macroblock
157
                ) {
158
            topright_xy -= s->mb_stride;
159
        }
160
        if (left_mb_frame_flag != curr_mb_frame_flag) {
161
            left_xy[1] = left_xy[0] = pair_xy - 1;
162
            if (curr_mb_frame_flag) {
163
                if (bottom) {
164
                    left_block = left_block_options[1];
165
                } else {
166
                    left_block= left_block_options[2];
167
                }
168
            } else {
169
                left_xy[1] += s->mb_stride;
170
                left_block = left_block_options[3];
171
            }
172
        }
173
    }
174

    
175
    h->top_mb_xy = top_xy;
176
    h->left_mb_xy[0] = left_xy[0];
177
    h->left_mb_xy[1] = left_xy[1];
178
    if(for_deblock){
179
        topleft_type = 0;
180
        topright_type = 0;
181
        top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
182
        left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
183
        left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
184

    
185
        if(MB_MBAFF && !IS_INTRA(mb_type)){
186
            int list;
187
            for(list=0; list<h->list_count; list++){
188
                //These values where changed for ease of performing MC, we need to change them back
189
                //FIXME maybe we can make MC and loop filter use the same values or prevent
190
                //the MC code from changing ref_cache and rather use a temporary array.
191
                if(USES_LIST(mb_type,list)){
192
                    int8_t *ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
193
                    *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
194
                    *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
195
                    ref += h->b8_stride;
196
                    *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
197
                    *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
198
                }
199
            }
200
        }
201
    }else{
202
        topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
203
        top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
204
        topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
205
        left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
206
        left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
207

    
208
    if(IS_INTRA(mb_type)){
209
        int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
210
        h->topleft_samples_available=
211
        h->top_samples_available=
212
        h->left_samples_available= 0xFFFF;
213
        h->topright_samples_available= 0xEEEA;
214

    
215
        if(!(top_type & type_mask)){
216
            h->topleft_samples_available= 0xB3FF;
217
            h->top_samples_available= 0x33FF;
218
            h->topright_samples_available= 0x26EA;
219
        }
220
        if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
221
            if(IS_INTERLACED(mb_type)){
222
                if(!(left_type[0] & type_mask)){
223
                    h->topleft_samples_available&= 0xDFFF;
224
                    h->left_samples_available&= 0x5FFF;
225
                }
226
                if(!(left_type[1] & type_mask)){
227
                    h->topleft_samples_available&= 0xFF5F;
228
                    h->left_samples_available&= 0xFF5F;
229
                }
230
            }else{
231
                int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
232
                                ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
233
                assert(left_xy[0] == left_xy[1]);
234
                if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
235
                    h->topleft_samples_available&= 0xDF5F;
236
                    h->left_samples_available&= 0x5F5F;
237
                }
238
            }
239
        }else{
240
            if(!(left_type[0] & type_mask)){
241
                h->topleft_samples_available&= 0xDF5F;
242
                h->left_samples_available&= 0x5F5F;
243
            }
244
        }
245

    
246
        if(!(topleft_type & type_mask))
247
            h->topleft_samples_available&= 0x7FFF;
248

    
249
        if(!(topright_type & type_mask))
250
            h->topright_samples_available&= 0xFBFF;
251

    
252
        if(IS_INTRA4x4(mb_type)){
253
            if(IS_INTRA4x4(top_type)){
254
                h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
255
                h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
256
                h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
257
                h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
258
            }else{
259
                int pred;
260
                if(!(top_type & type_mask))
261
                    pred= -1;
262
                else{
263
                    pred= 2;
264
                }
265
                h->intra4x4_pred_mode_cache[4+8*0]=
266
                h->intra4x4_pred_mode_cache[5+8*0]=
267
                h->intra4x4_pred_mode_cache[6+8*0]=
268
                h->intra4x4_pred_mode_cache[7+8*0]= pred;
269
            }
270
            for(i=0; i<2; i++){
271
                if(IS_INTRA4x4(left_type[i])){
272
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
273
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
274
                }else{
275
                    int pred;
276
                    if(!(left_type[i] & type_mask))
277
                        pred= -1;
278
                    else{
279
                        pred= 2;
280
                    }
281
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
282
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
283
                }
284
            }
285
        }
286
    }
287
    }
288

    
289

    
290
/*
291
0 . T T. T T T T
292
1 L . .L . . . .
293
2 L . .L . . . .
294
3 . T TL . . . .
295
4 L . .L . . . .
296
5 L . .. . . . .
297
*/
298
//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
299
    if(top_type){
300
        h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
301
        h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
302
        h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
303
        h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
304

    
305
        h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
306
        h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
307

    
308
        h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
309
        h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
310

    
311
    }else{
312
        h->non_zero_count_cache[4+8*0]=
313
        h->non_zero_count_cache[5+8*0]=
314
        h->non_zero_count_cache[6+8*0]=
315
        h->non_zero_count_cache[7+8*0]=
316

    
317
        h->non_zero_count_cache[1+8*0]=
318
        h->non_zero_count_cache[2+8*0]=
319

    
320
        h->non_zero_count_cache[1+8*3]=
321
        h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
322

    
323
    }
324

    
325
    for (i=0; i<2; i++) {
326
        if(left_type[i]){
327
            h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
328
            h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
329
            h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
330
            h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
331
        }else{
332
            h->non_zero_count_cache[3+8*1 + 2*8*i]=
333
            h->non_zero_count_cache[3+8*2 + 2*8*i]=
334
            h->non_zero_count_cache[0+8*1 +   8*i]=
335
            h->non_zero_count_cache[0+8*4 +   8*i]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
336
        }
337
    }
338

    
339
    if( h->pps.cabac ) {
340
        // top_cbp
341
        if(top_type) {
342
            h->top_cbp = h->cbp_table[top_xy];
343
        } else if(IS_INTRA(mb_type)) {
344
            h->top_cbp = 0x1C0;
345
        } else {
346
            h->top_cbp = 0;
347
        }
348
        // left_cbp
349
        if (left_type[0]) {
350
            h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
351
        } else if(IS_INTRA(mb_type)) {
352
            h->left_cbp = 0x1C0;
353
        } else {
354
            h->left_cbp = 0;
355
        }
356
        if (left_type[0]) {
357
            h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
358
        }
359
        if (left_type[1]) {
360
            h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
361
        }
362
    }
363

    
364
#if 1
365
    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
366
        int list;
367
        for(list=0; list<h->list_count; list++){
368
            if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
369
                /*if(!h->mv_cache_clean[list]){
370
                    memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
371
                    memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
372
                    h->mv_cache_clean[list]= 1;
373
                }*/
374
                continue;
375
            }
376
            h->mv_cache_clean[list]= 0;
377

    
378
            if(USES_LIST(top_type, list)){
379
                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
380
                const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
381
                *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
382
                *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
383
                *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
384
                *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
385
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
386
                h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
387
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
388
                h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
389
            }else{
390
                *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
391
                *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
392
                *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
393
                *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
394
                *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
395
            }
396

    
397
            for(i=0; i<2; i++){
398
                int cache_idx = scan8[0] - 1 + i*2*8;
399
                if(USES_LIST(left_type[i], list)){
400
                    const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
401
                    const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
402
                    *(uint32_t*)h->mv_cache[list][cache_idx  ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0+i*2]];
403
                    *(uint32_t*)h->mv_cache[list][cache_idx+8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[1+i*2]];
404
                    h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
405
                    h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
406
                }else{
407
                    *(uint32_t*)h->mv_cache [list][cache_idx  ]=
408
                    *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
409
                    h->ref_cache[list][cache_idx  ]=
410
                    h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
411
                }
412
            }
413

    
414
            if(for_deblock || ((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred) && !FRAME_MBAFF))
415
                continue;
416

    
417
            if(USES_LIST(topleft_type, list)){
418
                const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
419
                const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
420
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
421
                h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
422
            }else{
423
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
424
                h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
425
            }
426

    
427
            if(USES_LIST(topright_type, list)){
428
                const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
429
                const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
430
                *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
431
                h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
432
            }else{
433
                *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
434
                h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
435
            }
436

    
437
            if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
438
                continue;
439

    
440
            h->ref_cache[list][scan8[5 ]+1] =
441
            h->ref_cache[list][scan8[7 ]+1] =
442
            h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
443
            h->ref_cache[list][scan8[4 ]] =
444
            h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
445
            *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
446
            *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
447
            *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
448
            *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
449
            *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
450

    
451
            if( h->pps.cabac ) {
452
                /* XXX beurk, Load mvd */
453
                if(USES_LIST(top_type, list)){
454
                    const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
455
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
456
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
457
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
458
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
459
                }else{
460
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
461
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
462
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
463
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
464
                }
465
                if(USES_LIST(left_type[0], list)){
466
                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
467
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 0*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[0]];
468
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[1]];
469
                }else{
470
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
471
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
472
                }
473
                if(USES_LIST(left_type[1], list)){
474
                    const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
475
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 2*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[2]];
476
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 3*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[3]];
477
                }else{
478
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
479
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
480
                }
481
                *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
482
                *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
483
                *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
484
                *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
485
                *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
486

    
487
                if(h->slice_type_nos == FF_B_TYPE){
488
                    fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
489

    
490
                    if(IS_DIRECT(top_type)){
491
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
492
                    }else if(IS_8X8(top_type)){
493
                        int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
494
                        h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
495
                        h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
496
                    }else{
497
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
498
                    }
499

    
500
                    if(IS_DIRECT(left_type[0]))
501
                        h->direct_cache[scan8[0] - 1 + 0*8]= 1;
502
                    else if(IS_8X8(left_type[0]))
503
                        h->direct_cache[scan8[0] - 1 + 0*8]= h->direct_table[h->mb2b8_xy[left_xy[0]] + 1 + h->b8_stride*(left_block[0]>>1)];
504
                    else
505
                        h->direct_cache[scan8[0] - 1 + 0*8]= 0;
506

    
507
                    if(IS_DIRECT(left_type[1]))
508
                        h->direct_cache[scan8[0] - 1 + 2*8]= 1;
509
                    else if(IS_8X8(left_type[1]))
510
                        h->direct_cache[scan8[0] - 1 + 2*8]= h->direct_table[h->mb2b8_xy[left_xy[1]] + 1 + h->b8_stride*(left_block[2]>>1)];
511
                    else
512
                        h->direct_cache[scan8[0] - 1 + 2*8]= 0;
513
                }
514
            }
515

    
516
            if(FRAME_MBAFF){
517
#define MAP_MVS\
518
                    MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
519
                    MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
520
                    MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
521
                    MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
522
                    MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
523
                    MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
524
                    MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
525
                    MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
526
                    MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
527
                    MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
528
                if(MB_FIELD){
529
#define MAP_F2F(idx, mb_type)\
530
                    if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
531
                        h->ref_cache[list][idx] <<= 1;\
532
                        h->mv_cache[list][idx][1] /= 2;\
533
                        h->mvd_cache[list][idx][1] /= 2;\
534
                    }
535
                    MAP_MVS
536
#undef MAP_F2F
537
                }else{
538
#define MAP_F2F(idx, mb_type)\
539
                    if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
540
                        h->ref_cache[list][idx] >>= 1;\
541
                        h->mv_cache[list][idx][1] <<= 1;\
542
                        h->mvd_cache[list][idx][1] <<= 1;\
543
                    }
544
                    MAP_MVS
545
#undef MAP_F2F
546
                }
547
            }
548
        }
549
    }
550
#endif
551

    
552
    h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
553
}
554

    
555
static inline void write_back_intra_pred_mode(H264Context *h){
556
    const int mb_xy= h->mb_xy;
557

    
558
    h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
559
    h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
560
    h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
561
    h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
562
    h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
563
    h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
564
    h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
565
}
566

    
567
/**
568
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
569
 */
570
static inline int check_intra4x4_pred_mode(H264Context *h){
571
    MpegEncContext * const s = &h->s;
572
    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
573
    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
574
    int i;
575

    
576
    if(!(h->top_samples_available&0x8000)){
577
        for(i=0; i<4; i++){
578
            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
579
            if(status<0){
580
                av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
581
                return -1;
582
            } else if(status){
583
                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
584
            }
585
        }
586
    }
587

    
588
    if((h->left_samples_available&0x8888)!=0x8888){
589
        static const int mask[4]={0x8000,0x2000,0x80,0x20};
590
        for(i=0; i<4; i++){
591
            if(!(h->left_samples_available&mask[i])){
592
            int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
593
            if(status<0){
594
                av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
595
                return -1;
596
            } else if(status){
597
                h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
598
            }
599
            }
600
        }
601
    }
602

    
603
    return 0;
604
} //FIXME cleanup like next
605

    
606
/**
607
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
608
 */
609
static inline int check_intra_pred_mode(H264Context *h, int mode){
610
    MpegEncContext * const s = &h->s;
611
    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
612
    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
613

    
614
    if(mode > 6U) {
615
        av_log(h->s.avctx, AV_LOG_ERROR, "out of range intra chroma pred mode at %d %d\n", s->mb_x, s->mb_y);
616
        return -1;
617
    }
618

    
619
    if(!(h->top_samples_available&0x8000)){
620
        mode= top[ mode ];
621
        if(mode<0){
622
            av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
623
            return -1;
624
        }
625
    }
626

    
627
    if((h->left_samples_available&0x8080) != 0x8080){
628
        mode= left[ mode ];
629
        if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
630
            mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
631
        }
632
        if(mode<0){
633
            av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
634
            return -1;
635
        }
636
    }
637

    
638
    return mode;
639
}
640

    
641
/**
642
 * gets the predicted intra4x4 prediction mode.
643
 */
644
static inline int pred_intra_mode(H264Context *h, int n){
645
    const int index8= scan8[n];
646
    const int left= h->intra4x4_pred_mode_cache[index8 - 1];
647
    const int top = h->intra4x4_pred_mode_cache[index8 - 8];
648
    const int min= FFMIN(left, top);
649

    
650
    tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
651

    
652
    if(min<0) return DC_PRED;
653
    else      return min;
654
}
655

    
656
static inline void write_back_non_zero_count(H264Context *h){
657
    const int mb_xy= h->mb_xy;
658

    
659
    h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
660
    h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
661
    h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
662
    h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
663
    h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
664
    h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
665
    h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
666

    
667
    h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
668
    h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
669
    h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
670

    
671
    h->non_zero_count[mb_xy][12]=h->non_zero_count_cache[1+8*5];
672
    h->non_zero_count[mb_xy][11]=h->non_zero_count_cache[2+8*5];
673
    h->non_zero_count[mb_xy][10]=h->non_zero_count_cache[2+8*4];
674
}
675

    
676
/**
677
 * gets the predicted number of non-zero coefficients.
678
 * @param n block index
679
 */
680
static inline int pred_non_zero_count(H264Context *h, int n){
681
    const int index8= scan8[n];
682
    const int left= h->non_zero_count_cache[index8 - 1];
683
    const int top = h->non_zero_count_cache[index8 - 8];
684
    int i= left + top;
685

    
686
    if(i<64) i= (i+1)>>1;
687

    
688
    tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
689

    
690
    return i&31;
691
}
692

    
693
static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
694
    const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
695
    MpegEncContext *s = &h->s;
696

    
697
    /* there is no consistent mapping of mvs to neighboring locations that will
698
     * make mbaff happy, so we can't move all this logic to fill_caches */
699
    if(FRAME_MBAFF){
700
        const uint32_t *mb_types = s->current_picture_ptr->mb_type;
701
        const int16_t *mv;
702
        *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
703
        *C = h->mv_cache[list][scan8[0]-2];
704

    
705
        if(!MB_FIELD
706
           && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
707
            int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
708
            if(IS_INTERLACED(mb_types[topright_xy])){
709
#define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
710
                const int x4 = X4, y4 = Y4;\
711
                const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
712
                if(!USES_LIST(mb_type,list))\
713
                    return LIST_NOT_USED;\
714
                mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
715
                h->mv_cache[list][scan8[0]-2][0] = mv[0];\
716
                h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
717
                return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;
718

    
719
                SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
720
            }
721
        }
722
        if(topright_ref == PART_NOT_AVAILABLE
723
           && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
724
           && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
725
            if(!MB_FIELD
726
               && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
727
                SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
728
            }
729
            if(MB_FIELD
730
               && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
731
               && i >= scan8[0]+8){
732
                // left shift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's OK.
733
                SET_DIAG_MV(/2, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
734
            }
735
        }
736
#undef SET_DIAG_MV
737
    }
738

    
739
    if(topright_ref != PART_NOT_AVAILABLE){
740
        *C= h->mv_cache[list][ i - 8 + part_width ];
741
        return topright_ref;
742
    }else{
743
        tprintf(s->avctx, "topright MV not available\n");
744

    
745
        *C= h->mv_cache[list][ i - 8 - 1 ];
746
        return h->ref_cache[list][ i - 8 - 1 ];
747
    }
748
}
749

    
750
/**
751
 * gets the predicted MV.
752
 * @param n the block index
753
 * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
754
 * @param mx the x component of the predicted motion vector
755
 * @param my the y component of the predicted motion vector
756
 */
757
static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
758
    const int index8= scan8[n];
759
    const int top_ref=      h->ref_cache[list][ index8 - 8 ];
760
    const int left_ref=     h->ref_cache[list][ index8 - 1 ];
761
    const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
762
    const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
763
    const int16_t * C;
764
    int diagonal_ref, match_count;
765

    
766
    assert(part_width==1 || part_width==2 || part_width==4);
767

    
768
/* mv_cache
769
  B . . A T T T T
770
  U . . L . . , .
771
  U . . L . . . .
772
  U . . L . . , .
773
  . . . L . . . .
774
*/
775

    
776
    diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
777
    match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
778
    tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
779
    if(match_count > 1){ //most common
780
        *mx= mid_pred(A[0], B[0], C[0]);
781
        *my= mid_pred(A[1], B[1], C[1]);
782
    }else if(match_count==1){
783
        if(left_ref==ref){
784
            *mx= A[0];
785
            *my= A[1];
786
        }else if(top_ref==ref){
787
            *mx= B[0];
788
            *my= B[1];
789
        }else{
790
            *mx= C[0];
791
            *my= C[1];
792
        }
793
    }else{
794
        if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
795
            *mx= A[0];
796
            *my= A[1];
797
        }else{
798
            *mx= mid_pred(A[0], B[0], C[0]);
799
            *my= mid_pred(A[1], B[1], C[1]);
800
        }
801
    }
802

    
803
    tprintf(h->s.avctx, "pred_motion (%2d %2d %2d) (%2d %2d %2d) (%2d %2d %2d) -> (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1],                    diagonal_ref, C[0], C[1], left_ref, A[0], A[1], ref, *mx, *my, h->s.mb_x, h->s.mb_y, n, list);
804
}
805

    
806
/**
807
 * gets the directionally predicted 16x8 MV.
808
 * @param n the block index
809
 * @param mx the x component of the predicted motion vector
810
 * @param my the y component of the predicted motion vector
811
 */
812
static inline void pred_16x8_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
813
    if(n==0){
814
        const int top_ref=      h->ref_cache[list][ scan8[0] - 8 ];
815
        const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
816

    
817
        tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1], h->s.mb_x, h->s.mb_y, n, list);
818

    
819
        if(top_ref == ref){
820
            *mx= B[0];
821
            *my= B[1];
822
            return;
823
        }
824
    }else{
825
        const int left_ref=     h->ref_cache[list][ scan8[8] - 1 ];
826
        const int16_t * const A= h->mv_cache[list][ scan8[8] - 1 ];
827

    
828
        tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
829

    
830
        if(left_ref == ref){
831
            *mx= A[0];
832
            *my= A[1];
833
            return;
834
        }
835
    }
836

    
837
    //RARE
838
    pred_motion(h, n, 4, list, ref, mx, my);
839
}
840

    
841
/**
842
 * gets the directionally predicted 8x16 MV.
843
 * @param n the block index
844
 * @param mx the x component of the predicted motion vector
845
 * @param my the y component of the predicted motion vector
846
 */
847
static inline void pred_8x16_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
848
    if(n==0){
849
        const int left_ref=      h->ref_cache[list][ scan8[0] - 1 ];
850
        const int16_t * const A=  h->mv_cache[list][ scan8[0] - 1 ];
851

    
852
        tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
853

    
854
        if(left_ref == ref){
855
            *mx= A[0];
856
            *my= A[1];
857
            return;
858
        }
859
    }else{
860
        const int16_t * C;
861
        int diagonal_ref;
862

    
863
        diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
864

    
865
        tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", diagonal_ref, C[0], C[1], h->s.mb_x, h->s.mb_y, n, list);
866

    
867
        if(diagonal_ref == ref){
868
            *mx= C[0];
869
            *my= C[1];
870
            return;
871
        }
872
    }
873

    
874
    //RARE
875
    pred_motion(h, n, 2, list, ref, mx, my);
876
}
877

    
878
static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
879
    const int top_ref = h->ref_cache[0][ scan8[0] - 8 ];
880
    const int left_ref= h->ref_cache[0][ scan8[0] - 1 ];
881

    
882
    tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
883

    
884
    if(top_ref == PART_NOT_AVAILABLE || left_ref == PART_NOT_AVAILABLE
885
       || (top_ref == 0  && *(uint32_t*)h->mv_cache[0][ scan8[0] - 8 ] == 0)
886
       || (left_ref == 0 && *(uint32_t*)h->mv_cache[0][ scan8[0] - 1 ] == 0)){
887

    
888
        *mx = *my = 0;
889
        return;
890
    }
891

    
892
    pred_motion(h, 0, 4, 0, 0, mx, my);
893

    
894
    return;
895
}
896

    
897
static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
898
    int poc0 = h->ref_list[0][i].poc;
899
    int td = av_clip(poc1 - poc0, -128, 127);
900
    if(td == 0 || h->ref_list[0][i].long_ref){
901
        return 256;
902
    }else{
903
        int tb = av_clip(poc - poc0, -128, 127);
904
        int tx = (16384 + (FFABS(td) >> 1)) / td;
905
        return av_clip((tb*tx + 32) >> 6, -1024, 1023);
906
    }
907
}
908

    
909
static inline void direct_dist_scale_factor(H264Context * const h){
910
    MpegEncContext * const s = &h->s;
911
    const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
912
    const int poc1 = h->ref_list[1][0].poc;
913
    int i, field;
914
    for(field=0; field<2; field++){
915
        const int poc  = h->s.current_picture_ptr->field_poc[field];
916
        const int poc1 = h->ref_list[1][0].field_poc[field];
917
        for(i=0; i < 2*h->ref_count[0]; i++)
918
            h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
919
    }
920

    
921
    for(i=0; i<h->ref_count[0]; i++){
922
        h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
923
    }
924
}
925

    
926
static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
927
    MpegEncContext * const s = &h->s;
928
    Picture * const ref1 = &h->ref_list[1][0];
929
    int j, old_ref, rfield;
930
    int start= mbafi ? 16                      : 0;
931
    int end  = mbafi ? 16+2*h->ref_count[list] : h->ref_count[list];
932
    int interl= mbafi || s->picture_structure != PICT_FRAME;
933

    
934
    /* bogus; fills in for missing frames */
935
    memset(map[list], 0, sizeof(map[list]));
936

    
937
    for(rfield=0; rfield<2; rfield++){
938
        for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
939
            int poc = ref1->ref_poc[colfield][list][old_ref];
940

    
941
            if     (!interl)
942
                poc |= 3;
943
            else if( interl && (poc&3) == 3) //FIXME store all MBAFF references so this isnt needed
944
                poc= (poc&~3) + rfield + 1;
945

    
946
            for(j=start; j<end; j++){
947
                if(4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3) == poc){
948
                    int cur_ref= mbafi ? (j-16)^field : j;
949
                    map[list][2*old_ref + (rfield^field) + 16] = cur_ref;
950
                    if(rfield == field)
951
                        map[list][old_ref] = cur_ref;
952
                    break;
953
                }
954
            }
955
        }
956
    }
957
}
958

    
959
static inline void direct_ref_list_init(H264Context * const h){
960
    MpegEncContext * const s = &h->s;
961
    Picture * const ref1 = &h->ref_list[1][0];
962
    Picture * const cur = s->current_picture_ptr;
963
    int list, j, field;
964
    int sidx= (s->picture_structure&1)^1;
965
    int ref1sidx= (ref1->reference&1)^1;
966

    
967
    for(list=0; list<2; list++){
968
        cur->ref_count[sidx][list] = h->ref_count[list];
969
        for(j=0; j<h->ref_count[list]; j++)
970
            cur->ref_poc[sidx][list][j] = 4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3);
971
    }
972

    
973
    if(s->picture_structure == PICT_FRAME){
974
        memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
975
        memcpy(cur->ref_poc  [1], cur->ref_poc  [0], sizeof(cur->ref_poc  [0]));
976
    }
977

    
978
    cur->mbaff= FRAME_MBAFF;
979

    
980
    if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
981
        return;
982

    
983
    for(list=0; list<2; list++){
984
        fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
985
        for(field=0; field<2; field++)
986
            fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
987
    }
988
}
989

    
990
static inline void pred_direct_motion(H264Context * const h, int *mb_type){
991
    MpegEncContext * const s = &h->s;
992
    int b8_stride = h->b8_stride;
993
    int b4_stride = h->b_stride;
994
    int mb_xy = h->mb_xy;
995
    int mb_type_col[2];
996
    const int16_t (*l1mv0)[2], (*l1mv1)[2];
997
    const int8_t *l1ref0, *l1ref1;
998
    const int is_b8x8 = IS_8X8(*mb_type);
999
    unsigned int sub_mb_type;
1000
    int i8, i4;
1001

    
1002
#define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
1003

    
1004
    if(IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])){ // AFL/AFR/FR/FL -> AFL/FL
1005
        if(!IS_INTERLACED(*mb_type)){                    //     AFR/FR    -> AFL/FL
1006
            int cur_poc = s->current_picture_ptr->poc;
1007
            int *col_poc = h->ref_list[1]->field_poc;
1008
            int col_parity = FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc);
1009
            mb_xy= s->mb_x + ((s->mb_y&~1) + col_parity)*s->mb_stride;
1010
            b8_stride = 0;
1011
        }else if(!(s->picture_structure & h->ref_list[1][0].reference) && !h->ref_list[1][0].mbaff){// FL -> FL & differ parity
1012
            int fieldoff= 2*(h->ref_list[1][0].reference)-3;
1013
            mb_xy += s->mb_stride*fieldoff;
1014
        }
1015
        goto single_col;
1016
    }else{                                               // AFL/AFR/FR/FL -> AFR/FR
1017
        if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
1018
            mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
1019
            mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
1020
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + s->mb_stride];
1021
            b8_stride *= 3;
1022
            b4_stride *= 6;
1023
            //FIXME IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag
1024
            if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
1025
                && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
1026
                && !is_b8x8){
1027
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1028
                *mb_type   |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
1029
            }else{
1030
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1031
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1032
            }
1033
        }else{                                           //     AFR/FR    -> AFR/FR
1034
single_col:
1035
            mb_type_col[0] =
1036
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
1037
            if(IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag){
1038
                /* FIXME save sub mb types from previous frames (or derive from MVs)
1039
                * so we know exactly what block size to use */
1040
                sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
1041
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1042
            }else if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
1043
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1044
                *mb_type   |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
1045
            }else{
1046
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1047
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1048
            }
1049
        }
1050
    }
1051

    
1052
    l1mv0  = &h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
1053
    l1mv1  = &h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
1054
    l1ref0 = &h->ref_list[1][0].ref_index [0][h->mb2b8_xy[mb_xy]];
1055
    l1ref1 = &h->ref_list[1][0].ref_index [1][h->mb2b8_xy[mb_xy]];
1056
    if(!b8_stride){
1057
        if(s->mb_y&1){
1058
            l1ref0 += h->b8_stride;
1059
            l1ref1 += h->b8_stride;
1060
            l1mv0  +=  2*b4_stride;
1061
            l1mv1  +=  2*b4_stride;
1062
        }
1063
    }
1064

    
1065
    if(h->direct_spatial_mv_pred){
1066
        int ref[2];
1067
        int mv[2][2];
1068
        int list;
1069

    
1070
        /* FIXME interlacing + spatial direct uses wrong colocated block positions */
1071

    
1072
        /* ref = min(neighbors) */
1073
        for(list=0; list<2; list++){
1074
            int refa = h->ref_cache[list][scan8[0] - 1];
1075
            int refb = h->ref_cache[list][scan8[0] - 8];
1076
            int refc = h->ref_cache[list][scan8[0] - 8 + 4];
1077
            if(refc == PART_NOT_AVAILABLE)
1078
                refc = h->ref_cache[list][scan8[0] - 8 - 1];
1079
            ref[list] = FFMIN3((unsigned)refa, (unsigned)refb, (unsigned)refc);
1080
            if(ref[list] < 0)
1081
                ref[list] = -1;
1082
        }
1083

    
1084
        if(ref[0] < 0 && ref[1] < 0){
1085
            ref[0] = ref[1] = 0;
1086
            mv[0][0] = mv[0][1] =
1087
            mv[1][0] = mv[1][1] = 0;
1088
        }else{
1089
            for(list=0; list<2; list++){
1090
                if(ref[list] >= 0)
1091
                    pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
1092
                else
1093
                    mv[list][0] = mv[list][1] = 0;
1094
            }
1095
        }
1096

    
1097
        if(ref[1] < 0){
1098
            if(!is_b8x8)
1099
                *mb_type &= ~MB_TYPE_L1;
1100
            sub_mb_type &= ~MB_TYPE_L1;
1101
        }else if(ref[0] < 0){
1102
            if(!is_b8x8)
1103
                *mb_type &= ~MB_TYPE_L0;
1104
            sub_mb_type &= ~MB_TYPE_L0;
1105
        }
1106

    
1107
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1108
            for(i8=0; i8<4; i8++){
1109
                int x8 = i8&1;
1110
                int y8 = i8>>1;
1111
                int xy8 = x8+y8*b8_stride;
1112
                int xy4 = 3*x8+y8*b4_stride;
1113
                int a=0, b=0;
1114

    
1115
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1116
                    continue;
1117
                h->sub_mb_type[i8] = sub_mb_type;
1118

    
1119
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1120
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1121
                if(!IS_INTRA(mb_type_col[y8])
1122
                   && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
1123
                       || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
1124
                    if(ref[0] > 0)
1125
                        a= pack16to32(mv[0][0],mv[0][1]);
1126
                    if(ref[1] > 0)
1127
                        b= pack16to32(mv[1][0],mv[1][1]);
1128
                }else{
1129
                    a= pack16to32(mv[0][0],mv[0][1]);
1130
                    b= pack16to32(mv[1][0],mv[1][1]);
1131
                }
1132
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
1133
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
1134
            }
1135
        }else if(IS_16X16(*mb_type)){
1136
            int a=0, b=0;
1137

    
1138
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
1139
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
1140
            if(!IS_INTRA(mb_type_col[0])
1141
               && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
1142
                   || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
1143
                       && (h->x264_build>33 || !h->x264_build)))){
1144
                if(ref[0] > 0)
1145
                    a= pack16to32(mv[0][0],mv[0][1]);
1146
                if(ref[1] > 0)
1147
                    b= pack16to32(mv[1][0],mv[1][1]);
1148
            }else{
1149
                a= pack16to32(mv[0][0],mv[0][1]);
1150
                b= pack16to32(mv[1][0],mv[1][1]);
1151
            }
1152
            fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
1153
            fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
1154
        }else{
1155
            for(i8=0; i8<4; i8++){
1156
                const int x8 = i8&1;
1157
                const int y8 = i8>>1;
1158

    
1159
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1160
                    continue;
1161
                h->sub_mb_type[i8] = sub_mb_type;
1162

    
1163
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
1164
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
1165
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1166
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1167

    
1168
                /* col_zero_flag */
1169
                if(!IS_INTRA(mb_type_col[0]) && (   l1ref0[x8 + y8*b8_stride] == 0
1170
                                              || (l1ref0[x8 + y8*b8_stride] < 0 && l1ref1[x8 + y8*b8_stride] == 0
1171
                                                  && (h->x264_build>33 || !h->x264_build)))){
1172
                    const int16_t (*l1mv)[2]= l1ref0[x8 + y8*b8_stride] == 0 ? l1mv0 : l1mv1;
1173
                    if(IS_SUB_8X8(sub_mb_type)){
1174
                        const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1175
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1176
                            if(ref[0] == 0)
1177
                                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1178
                            if(ref[1] == 0)
1179
                                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1180
                        }
1181
                    }else
1182
                    for(i4=0; i4<4; i4++){
1183
                        const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1184
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1185
                            if(ref[0] == 0)
1186
                                *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1187
                            if(ref[1] == 0)
1188
                                *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
1189
                        }
1190
                    }
1191
                }
1192
            }
1193
        }
1194
    }else{ /* direct temporal mv pred */
1195
        const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
1196
        const int *dist_scale_factor = h->dist_scale_factor;
1197
        int ref_offset= 0;
1198

    
1199
        if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
1200
            map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
1201
            map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
1202
            dist_scale_factor   =h->dist_scale_factor_field[s->mb_y&1];
1203
        }
1204
        if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0]))
1205
            ref_offset += 16;
1206

    
1207
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1208
            /* FIXME assumes direct_8x8_inference == 1 */
1209
            int y_shift  = 2*!IS_INTERLACED(*mb_type);
1210

    
1211
            for(i8=0; i8<4; i8++){
1212
                const int x8 = i8&1;
1213
                const int y8 = i8>>1;
1214
                int ref0, scale;
1215
                const int16_t (*l1mv)[2]= l1mv0;
1216

    
1217
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1218
                    continue;
1219
                h->sub_mb_type[i8] = sub_mb_type;
1220

    
1221
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1222
                if(IS_INTRA(mb_type_col[y8])){
1223
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1224
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1225
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1226
                    continue;
1227
                }
1228

    
1229
                ref0 = l1ref0[x8 + y8*b8_stride];
1230
                if(ref0 >= 0)
1231
                    ref0 = map_col_to_list0[0][ref0 + ref_offset];
1232
                else{
1233
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1234
                    l1mv= l1mv1;
1235
                }
1236
                scale = dist_scale_factor[ref0];
1237
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1238

    
1239
                {
1240
                    const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
1241
                    int my_col = (mv_col[1]<<y_shift)/2;
1242
                    int mx = (scale * mv_col[0] + 128) >> 8;
1243
                    int my = (scale * my_col + 128) >> 8;
1244
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1245
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
1246
                }
1247
            }
1248
            return;
1249
        }
1250

    
1251
        /* one-to-one mv scaling */
1252

    
1253
        if(IS_16X16(*mb_type)){
1254
            int ref, mv0, mv1;
1255

    
1256
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
1257
            if(IS_INTRA(mb_type_col[0])){
1258
                ref=mv0=mv1=0;
1259
            }else{
1260
                const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
1261
                                                : map_col_to_list0[1][l1ref1[0] + ref_offset];
1262
                const int scale = dist_scale_factor[ref0];
1263
                const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
1264
                int mv_l0[2];
1265
                mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1266
                mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1267
                ref= ref0;
1268
                mv0= pack16to32(mv_l0[0],mv_l0[1]);
1269
                mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1270
            }
1271
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
1272
            fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
1273
            fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
1274
        }else{
1275
            for(i8=0; i8<4; i8++){
1276
                const int x8 = i8&1;
1277
                const int y8 = i8>>1;
1278
                int ref0, scale;
1279
                const int16_t (*l1mv)[2]= l1mv0;
1280

    
1281
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1282
                    continue;
1283
                h->sub_mb_type[i8] = sub_mb_type;
1284
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1285
                if(IS_INTRA(mb_type_col[0])){
1286
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1287
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1288
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1289
                    continue;
1290
                }
1291

    
1292
                ref0 = l1ref0[x8 + y8*b8_stride] + ref_offset;
1293
                if(ref0 >= 0)
1294
                    ref0 = map_col_to_list0[0][ref0];
1295
                else{
1296
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1297
                    l1mv= l1mv1;
1298
                }
1299
                scale = dist_scale_factor[ref0];
1300

    
1301
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1302
                if(IS_SUB_8X8(sub_mb_type)){
1303
                    const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1304
                    int mx = (scale * mv_col[0] + 128) >> 8;
1305
                    int my = (scale * mv_col[1] + 128) >> 8;
1306
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1307
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
1308
                }else
1309
                for(i4=0; i4<4; i4++){
1310
                    const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1311
                    int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
1312
                    mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1313
                    mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1314
                    *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
1315
                        pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1316
                }
1317
            }
1318
        }
1319
    }
1320
}
1321

    
1322
static inline void write_back_motion(H264Context *h, int mb_type){
1323
    MpegEncContext * const s = &h->s;
1324
    const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1325
    const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1326
    int list;
1327

    
1328
    if(!USES_LIST(mb_type, 0))
1329
        fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1330

    
1331
    for(list=0; list<h->list_count; list++){
1332
        int y;
1333
        if(!USES_LIST(mb_type, list))
1334
            continue;
1335

    
1336
        for(y=0; y<4; y++){
1337
            *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+0 + 8*y];
1338
            *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+2 + 8*y];
1339
        }
1340
        if( h->pps.cabac ) {
1341
            if(IS_SKIP(mb_type))
1342
                fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
1343
            else
1344
            for(y=0; y<4; y++){
1345
                *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
1346
                *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
1347
            }
1348
        }
1349

    
1350
        {
1351
            int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1352
            ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1353
            ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1354
            ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1355
            ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1356
        }
1357
    }
1358

    
1359
    if(h->slice_type_nos == FF_B_TYPE && h->pps.cabac){
1360
        if(IS_8X8(mb_type)){
1361
            uint8_t *direct_table = &h->direct_table[b8_xy];
1362
            direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1363
            direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1364
            direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1365
        }
1366
    }
1367
}
1368

    
1369
/**
1370
 * Decodes a network abstraction layer unit.
1371
 * @param consumed is the number of bytes used as input
1372
 * @param length is the length of the array
1373
 * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
1374
 * @returns decoded bytes, might be src+1 if no escapes
1375
 */
1376
static const uint8_t *decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
1377
    int i, si, di;
1378
    uint8_t *dst;
1379
    int bufidx;
1380

    
1381
//    src[0]&0x80;                //forbidden bit
1382
    h->nal_ref_idc= src[0]>>5;
1383
    h->nal_unit_type= src[0]&0x1F;
1384

    
1385
    src++; length--;
1386
#if 0
1387
    for(i=0; i<length; i++)
1388
        printf("%2X ", src[i]);
1389
#endif
1390
    for(i=0; i+1<length; i+=2){
1391
        if(src[i]) continue;
1392
        if(i>0 && src[i-1]==0) i--;
1393
        if(i+2<length && src[i+1]==0 && src[i+2]<=3){
1394
            if(src[i+2]!=3){
1395
                /* startcode, so we must be past the end */
1396
                length=i;
1397
            }
1398
            break;
1399
        }
1400
    }
1401

    
1402
    if(i>=length-1){ //no escaped 0
1403
        *dst_length= length;
1404
        *consumed= length+1; //+1 for the header
1405
        return src;
1406
    }
1407

    
1408
    bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
1409
    h->rbsp_buffer[bufidx]= av_fast_realloc(h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length);
1410
    dst= h->rbsp_buffer[bufidx];
1411

    
1412
    if (dst == NULL){
1413
        return NULL;
1414
    }
1415

    
1416
//printf("decoding esc\n");
1417
    si=di=0;
1418
    while(si<length){
1419
        //remove escapes (very rare 1:2^22)
1420
        if(si+2<length && src[si]==0 && src[si+1]==0 && src[si+2]<=3){
1421
            if(src[si+2]==3){ //escape
1422
                dst[di++]= 0;
1423
                dst[di++]= 0;
1424
                si+=3;
1425
                continue;
1426
            }else //next start code
1427
                break;
1428
        }
1429

    
1430
        dst[di++]= src[si++];
1431
    }
1432

    
1433
    *dst_length= di;
1434
    *consumed= si + 1;//+1 for the header
1435
//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
1436
    return dst;
1437
}
1438

    
1439
/**
1440
 * identifies the exact end of the bitstream
1441
 * @return the length of the trailing, or 0 if damaged
1442
 */
1443
static int decode_rbsp_trailing(H264Context *h, const uint8_t *src){
1444
    int v= *src;
1445
    int r;
1446

    
1447
    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
1448

    
1449
    for(r=1; r<9; r++){
1450
        if(v&1) return r;
1451
        v>>=1;
1452
    }
1453
    return 0;
1454
}
1455

    
1456
/**
1457
 * IDCT transforms the 16 dc values and dequantizes them.
1458
 * @param qp quantization parameter
1459
 */
1460
static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1461
#define stride 16
1462
    int i;
1463
    int temp[16]; //FIXME check if this is a good idea
1464
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1465
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1466

    
1467
//memset(block, 64, 2*256);
1468
//return;
1469
    for(i=0; i<4; i++){
1470
        const int offset= y_offset[i];
1471
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1472
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1473
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1474
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1475

    
1476
        temp[4*i+0]= z0+z3;
1477
        temp[4*i+1]= z1+z2;
1478
        temp[4*i+2]= z1-z2;
1479
        temp[4*i+3]= z0-z3;
1480
    }
1481

    
1482
    for(i=0; i<4; i++){
1483
        const int offset= x_offset[i];
1484
        const int z0= temp[4*0+i] + temp[4*2+i];
1485
        const int z1= temp[4*0+i] - temp[4*2+i];
1486
        const int z2= temp[4*1+i] - temp[4*3+i];
1487
        const int z3= temp[4*1+i] + temp[4*3+i];
1488

    
1489
        block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
1490
        block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
1491
        block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
1492
        block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
1493
    }
1494
}
1495

    
1496
#if 0
1497
/**
1498
 * DCT transforms the 16 dc values.
1499
 * @param qp quantization parameter ??? FIXME
1500
 */
1501
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
1502
//    const int qmul= dequant_coeff[qp][0];
1503
    int i;
1504
    int temp[16]; //FIXME check if this is a good idea
1505
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1506
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1507

1508
    for(i=0; i<4; i++){
1509
        const int offset= y_offset[i];
1510
        const int z0= block[offset+stride*0] + block[offset+stride*4];
1511
        const int z1= block[offset+stride*0] - block[offset+stride*4];
1512
        const int z2= block[offset+stride*1] - block[offset+stride*5];
1513
        const int z3= block[offset+stride*1] + block[offset+stride*5];
1514

1515
        temp[4*i+0]= z0+z3;
1516
        temp[4*i+1]= z1+z2;
1517
        temp[4*i+2]= z1-z2;
1518
        temp[4*i+3]= z0-z3;
1519
    }
1520

1521
    for(i=0; i<4; i++){
1522
        const int offset= x_offset[i];
1523
        const int z0= temp[4*0+i] + temp[4*2+i];
1524
        const int z1= temp[4*0+i] - temp[4*2+i];
1525
        const int z2= temp[4*1+i] - temp[4*3+i];
1526
        const int z3= temp[4*1+i] + temp[4*3+i];
1527

1528
        block[stride*0 +offset]= (z0 + z3)>>1;
1529
        block[stride*2 +offset]= (z1 + z2)>>1;
1530
        block[stride*8 +offset]= (z1 - z2)>>1;
1531
        block[stride*10+offset]= (z0 - z3)>>1;
1532
    }
1533
}
1534
#endif
1535

    
1536
#undef xStride
1537
#undef stride
1538

    
1539
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1540
    const int stride= 16*2;
1541
    const int xStride= 16;
1542
    int a,b,c,d,e;
1543

    
1544
    a= block[stride*0 + xStride*0];
1545
    b= block[stride*0 + xStride*1];
1546
    c= block[stride*1 + xStride*0];
1547
    d= block[stride*1 + xStride*1];
1548

    
1549
    e= a-b;
1550
    a= a+b;
1551
    b= c-d;
1552
    c= c+d;
1553

    
1554
    block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
1555
    block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
1556
    block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
1557
    block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
1558
}
1559

    
1560
#if 0
1561
static void chroma_dc_dct_c(DCTELEM *block){
1562
    const int stride= 16*2;
1563
    const int xStride= 16;
1564
    int a,b,c,d,e;
1565

1566
    a= block[stride*0 + xStride*0];
1567
    b= block[stride*0 + xStride*1];
1568
    c= block[stride*1 + xStride*0];
1569
    d= block[stride*1 + xStride*1];
1570

1571
    e= a-b;
1572
    a= a+b;
1573
    b= c-d;
1574
    c= c+d;
1575

1576
    block[stride*0 + xStride*0]= (a+c);
1577
    block[stride*0 + xStride*1]= (e+b);
1578
    block[stride*1 + xStride*0]= (a-c);
1579
    block[stride*1 + xStride*1]= (e-b);
1580
}
1581
#endif
1582

    
1583
/**
1584
 * gets the chroma qp.
1585
 */
1586
static inline int get_chroma_qp(H264Context *h, int t, int qscale){
1587
    return h->pps.chroma_qp_table[t][qscale];
1588
}
1589

    
1590
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
1591
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1592
                           int src_x_offset, int src_y_offset,
1593
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
1594
    MpegEncContext * const s = &h->s;
1595
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
1596
    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
1597
    const int luma_xy= (mx&3) + ((my&3)<<2);
1598
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
1599
    uint8_t * src_cb, * src_cr;
1600
    int extra_width= h->emu_edge_width;
1601
    int extra_height= h->emu_edge_height;
1602
    int emu=0;
1603
    const int full_mx= mx>>2;
1604
    const int full_my= my>>2;
1605
    const int pic_width  = 16*s->mb_width;
1606
    const int pic_height = 16*s->mb_height >> MB_FIELD;
1607

    
1608
    if(!pic->data[0]) //FIXME this is unacceptable, some sensible error concealment must be done for missing reference frames
1609
        return;
1610

    
1611
    if(mx&7) extra_width -= 3;
1612
    if(my&7) extra_height -= 3;
1613

    
1614
    if(   full_mx < 0-extra_width
1615
       || full_my < 0-extra_height
1616
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
1617
       || full_my + 16/*FIXME*/ > pic_height + extra_height){
1618
        ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->mb_linesize, h->mb_linesize, 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
1619
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
1620
        emu=1;
1621
    }
1622

    
1623
    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
1624
    if(!square){
1625
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
1626
    }
1627

    
1628
    if(ENABLE_GRAY && s->flags&CODEC_FLAG_GRAY) return;
1629

    
1630
    if(MB_FIELD){
1631
        // chroma offset when predicting from a field of opposite parity
1632
        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
1633
        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
1634
    }
1635
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1636
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1637

    
1638
    if(emu){
1639
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
1640
            src_cb= s->edge_emu_buffer;
1641
    }
1642
    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1643

    
1644
    if(emu){
1645
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
1646
            src_cr= s->edge_emu_buffer;
1647
    }
1648
    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1649
}
1650

    
1651
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
1652
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1653
                           int x_offset, int y_offset,
1654
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1655
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1656
                           int list0, int list1){
1657
    MpegEncContext * const s = &h->s;
1658
    qpel_mc_func *qpix_op=  qpix_put;
1659
    h264_chroma_mc_func chroma_op= chroma_put;
1660

    
1661
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1662
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1663
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1664
    x_offset += 8*s->mb_x;
1665
    y_offset += 8*(s->mb_y >> MB_FIELD);
1666

    
1667
    if(list0){
1668
        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
1669
        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
1670
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1671
                           qpix_op, chroma_op);
1672

    
1673
        qpix_op=  qpix_avg;
1674
        chroma_op= chroma_avg;
1675
    }
1676

    
1677
    if(list1){
1678
        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
1679
        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
1680
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
1681
                           qpix_op, chroma_op);
1682
    }
1683
}
1684

    
1685
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
1686
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1687
                           int x_offset, int y_offset,
1688
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1689
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
1690
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
1691
                           int list0, int list1){
1692
    MpegEncContext * const s = &h->s;
1693

    
1694
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1695
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1696
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1697
    x_offset += 8*s->mb_x;
1698
    y_offset += 8*(s->mb_y >> MB_FIELD);
1699

    
1700
    if(list0 && list1){
1701
        /* don't optimize for luma-only case, since B-frames usually
1702
         * use implicit weights => chroma too. */
1703
        uint8_t *tmp_cb = s->obmc_scratchpad;
1704
        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
1705
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
1706
        int refn0 = h->ref_cache[0][ scan8[n] ];
1707
        int refn1 = h->ref_cache[1][ scan8[n] ];
1708

    
1709
        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
1710
                    dest_y, dest_cb, dest_cr,
1711
                    x_offset, y_offset, qpix_put, chroma_put);
1712
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
1713
                    tmp_y, tmp_cb, tmp_cr,
1714
                    x_offset, y_offset, qpix_put, chroma_put);
1715

    
1716
        if(h->use_weight == 2){
1717
            int weight0 = h->implicit_weight[refn0][refn1];
1718
            int weight1 = 64 - weight0;
1719
            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
1720
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
1721
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
1722
        }else{
1723
            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
1724
                            h->luma_weight[0][refn0], h->luma_weight[1][refn1],
1725
                            h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
1726
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1727
                            h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
1728
                            h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
1729
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1730
                            h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
1731
                            h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
1732
        }
1733
    }else{
1734
        int list = list1 ? 1 : 0;
1735
        int refn = h->ref_cache[list][ scan8[n] ];
1736
        Picture *ref= &h->ref_list[list][refn];
1737
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
1738
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
1739
                    qpix_put, chroma_put);
1740

    
1741
        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
1742
                       h->luma_weight[list][refn], h->luma_offset[list][refn]);
1743
        if(h->use_weight_chroma){
1744
            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1745
                             h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
1746
            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1747
                             h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
1748
        }
1749
    }
1750
}
1751

    
1752
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
1753
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1754
                           int x_offset, int y_offset,
1755
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1756
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1757
                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
1758
                           int list0, int list1){
1759
    if((h->use_weight==2 && list0 && list1
1760
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
1761
       || h->use_weight==1)
1762
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1763
                         x_offset, y_offset, qpix_put, chroma_put,
1764
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
1765
    else
1766
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1767
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
1768
}
1769

    
1770
static inline void prefetch_motion(H264Context *h, int list){
1771
    /* fetch pixels for estimated mv 4 macroblocks ahead
1772
     * optimized for 64byte cache lines */
1773
    MpegEncContext * const s = &h->s;
1774
    const int refn = h->ref_cache[list][scan8[0]];
1775
    if(refn >= 0){
1776
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
1777
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
1778
        uint8_t **src= h->ref_list[list][refn].data;
1779
        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
1780
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
1781
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
1782
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
1783
    }
1784
}
1785

    
1786
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1787
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
1788
                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
1789
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
1790
    MpegEncContext * const s = &h->s;
1791
    const int mb_xy= h->mb_xy;
1792
    const int mb_type= s->current_picture.mb_type[mb_xy];
1793

    
1794
    assert(IS_INTER(mb_type));
1795

    
1796
    prefetch_motion(h, 0);
1797

    
1798
    if(IS_16X16(mb_type)){
1799
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
1800
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
1801
                &weight_op[0], &weight_avg[0],
1802
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1803
    }else if(IS_16X8(mb_type)){
1804
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
1805
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1806
                &weight_op[1], &weight_avg[1],
1807
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1808
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
1809
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1810
                &weight_op[1], &weight_avg[1],
1811
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1812
    }else if(IS_8X16(mb_type)){
1813
        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
1814
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1815
                &weight_op[2], &weight_avg[2],
1816
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1817
        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
1818
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1819
                &weight_op[2], &weight_avg[2],
1820
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1821
    }else{
1822
        int i;
1823

    
1824
        assert(IS_8X8(mb_type));
1825

    
1826
        for(i=0; i<4; i++){
1827
            const int sub_mb_type= h->sub_mb_type[i];
1828
            const int n= 4*i;
1829
            int x_offset= (i&1)<<2;
1830
            int y_offset= (i&2)<<1;
1831

    
1832
            if(IS_SUB_8X8(sub_mb_type)){
1833
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1834
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1835
                    &weight_op[3], &weight_avg[3],
1836
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1837
            }else if(IS_SUB_8X4(sub_mb_type)){
1838
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1839
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1840
                    &weight_op[4], &weight_avg[4],
1841
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1842
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
1843
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1844
                    &weight_op[4], &weight_avg[4],
1845
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1846
            }else if(IS_SUB_4X8(sub_mb_type)){
1847
                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1848
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1849
                    &weight_op[5], &weight_avg[5],
1850
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1851
                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
1852
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1853
                    &weight_op[5], &weight_avg[5],
1854
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1855
            }else{
1856
                int j;
1857
                assert(IS_SUB_4X4(sub_mb_type));
1858
                for(j=0; j<4; j++){
1859
                    int sub_x_offset= x_offset + 2*(j&1);
1860
                    int sub_y_offset= y_offset +   (j&2);
1861
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
1862
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1863
                        &weight_op[6], &weight_avg[6],
1864
                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1865
                }
1866
            }
1867
        }
1868
    }
1869

    
1870
    prefetch_motion(h, 1);
1871
}
1872

    
1873
static av_cold void decode_init_vlc(void){
1874
    static int done = 0;
1875

    
1876
    if (!done) {
1877
        int i;
1878
        int offset;
1879
        done = 1;
1880

    
1881
        chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
1882
        chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
1883
        init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
1884
                 &chroma_dc_coeff_token_len [0], 1, 1,
1885
                 &chroma_dc_coeff_token_bits[0], 1, 1,
1886
                 INIT_VLC_USE_NEW_STATIC);
1887

    
1888
        offset = 0;
1889
        for(i=0; i<4; i++){
1890
            coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
1891
            coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
1892
            init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
1893
                     &coeff_token_len [i][0], 1, 1,
1894
                     &coeff_token_bits[i][0], 1, 1,
1895
                     INIT_VLC_USE_NEW_STATIC);
1896
            offset += coeff_token_vlc_tables_size[i];
1897
        }
1898
        /*
1899
         * This is a one time safety check to make sure that
1900
         * the packed static coeff_token_vlc table sizes
1901
         * were initialized correctly.
1902
         */
1903
        assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
1904

    
1905
        for(i=0; i<3; i++){
1906
            chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
1907
            chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
1908
            init_vlc(&chroma_dc_total_zeros_vlc[i],
1909
                     CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
1910
                     &chroma_dc_total_zeros_len [i][0], 1, 1,
1911
                     &chroma_dc_total_zeros_bits[i][0], 1, 1,
1912
                     INIT_VLC_USE_NEW_STATIC);
1913
        }
1914
        for(i=0; i<15; i++){
1915
            total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
1916
            total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
1917
            init_vlc(&total_zeros_vlc[i],
1918
                     TOTAL_ZEROS_VLC_BITS, 16,
1919
                     &total_zeros_len [i][0], 1, 1,
1920
                     &total_zeros_bits[i][0], 1, 1,
1921
                     INIT_VLC_USE_NEW_STATIC);
1922
        }
1923

    
1924
        for(i=0; i<6; i++){
1925
            run_vlc[i].table = run_vlc_tables[i];
1926
            run_vlc[i].table_allocated = run_vlc_tables_size;
1927
            init_vlc(&run_vlc[i],
1928
                     RUN_VLC_BITS, 7,
1929
                     &run_len [i][0], 1, 1,
1930
                     &run_bits[i][0], 1, 1,
1931
                     INIT_VLC_USE_NEW_STATIC);
1932
        }
1933
        run7_vlc.table = run7_vlc_table,
1934
        run7_vlc.table_allocated = run7_vlc_table_size;
1935
        init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
1936
                 &run_len [6][0], 1, 1,
1937
                 &run_bits[6][0], 1, 1,
1938
                 INIT_VLC_USE_NEW_STATIC);
1939
    }
1940
}
1941

    
1942
static void free_tables(H264Context *h){
1943
    int i;
1944
    H264Context *hx;
1945
    av_freep(&h->intra4x4_pred_mode);
1946
    av_freep(&h->chroma_pred_mode_table);
1947
    av_freep(&h->cbp_table);
1948
    av_freep(&h->mvd_table[0]);
1949
    av_freep(&h->mvd_table[1]);
1950
    av_freep(&h->direct_table);
1951
    av_freep(&h->non_zero_count);
1952
    av_freep(&h->slice_table_base);
1953
    h->slice_table= NULL;
1954

    
1955
    av_freep(&h->mb2b_xy);
1956
    av_freep(&h->mb2b8_xy);
1957

    
1958
    for(i = 0; i < h->s.avctx->thread_count; i++) {
1959
        hx = h->thread_context[i];
1960
        if(!hx) continue;
1961
        av_freep(&hx->top_borders[1]);
1962
        av_freep(&hx->top_borders[0]);
1963
        av_freep(&hx->s.obmc_scratchpad);
1964
    }
1965
}
1966

    
1967
static void init_dequant8_coeff_table(H264Context *h){
1968
    int i,q,x;
1969
    const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
1970
    h->dequant8_coeff[0] = h->dequant8_buffer[0];
1971
    h->dequant8_coeff[1] = h->dequant8_buffer[1];
1972

    
1973
    for(i=0; i<2; i++ ){
1974
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
1975
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
1976
            break;
1977
        }
1978

    
1979
        for(q=0; q<52; q++){
1980
            int shift = div6[q];
1981
            int idx = rem6[q];
1982
            for(x=0; x<64; x++)
1983
                h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
1984
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
1985
                    h->pps.scaling_matrix8[i][x]) << shift;
1986
        }
1987
    }
1988
}
1989

    
1990
static void init_dequant4_coeff_table(H264Context *h){
1991
    int i,j,q,x;
1992
    const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
1993
    for(i=0; i<6; i++ ){
1994
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
1995
        for(j=0; j<i; j++){
1996
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
1997
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
1998
                break;
1999
            }
2000
        }
2001
        if(j<i)
2002
            continue;
2003

    
2004
        for(q=0; q<52; q++){
2005
            int shift = div6[q] + 2;
2006
            int idx = rem6[q];
2007
            for(x=0; x<16; x++)
2008
                h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
2009
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
2010
                    h->pps.scaling_matrix4[i][x]) << shift;
2011
        }
2012
    }
2013
}
2014

    
2015
static void init_dequant_tables(H264Context *h){
2016
    int i,x;
2017
    init_dequant4_coeff_table(h);
2018
    if(h->pps.transform_8x8_mode)
2019
        init_dequant8_coeff_table(h);
2020
    if(h->sps.transform_bypass){
2021
        for(i=0; i<6; i++)
2022
            for(x=0; x<16; x++)
2023
                h->dequant4_coeff[i][0][x] = 1<<6;
2024
        if(h->pps.transform_8x8_mode)
2025
            for(i=0; i<2; i++)
2026
                for(x=0; x<64; x++)
2027
                    h->dequant8_coeff[i][0][x] = 1<<6;
2028
    }
2029
}
2030

    
2031

    
2032
/**
2033
 * allocates tables.
2034
 * needs width/height
2035
 */
2036
static int alloc_tables(H264Context *h){
2037
    MpegEncContext * const s = &h->s;
2038
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
2039
    int x,y;
2040

    
2041
    CHECKED_ALLOCZ(h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t))
2042

    
2043
    CHECKED_ALLOCZ(h->non_zero_count    , big_mb_num * 16 * sizeof(uint8_t))
2044
    CHECKED_ALLOCZ(h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base))
2045
    CHECKED_ALLOCZ(h->cbp_table, big_mb_num * sizeof(uint16_t))
2046

    
2047
    CHECKED_ALLOCZ(h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t))
2048
    CHECKED_ALLOCZ(h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t));
2049
    CHECKED_ALLOCZ(h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t));
2050
    CHECKED_ALLOCZ(h->direct_table, 32*big_mb_num * sizeof(uint8_t));
2051

    
2052
    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
2053
    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
2054

    
2055
    CHECKED_ALLOCZ(h->mb2b_xy  , big_mb_num * sizeof(uint32_t));
2056
    CHECKED_ALLOCZ(h->mb2b8_xy , big_mb_num * sizeof(uint32_t));
2057
    for(y=0; y<s->mb_height; y++){
2058
        for(x=0; x<s->mb_width; x++){
2059
            const int mb_xy= x + y*s->mb_stride;
2060
            const int b_xy = 4*x + 4*y*h->b_stride;
2061
            const int b8_xy= 2*x + 2*y*h->b8_stride;
2062

    
2063
            h->mb2b_xy [mb_xy]= b_xy;
2064
            h->mb2b8_xy[mb_xy]= b8_xy;
2065
        }
2066
    }
2067

    
2068
    s->obmc_scratchpad = NULL;
2069

    
2070
    if(!h->dequant4_coeff[0])
2071
        init_dequant_tables(h);
2072

    
2073
    return 0;
2074
fail:
2075
    free_tables(h);
2076
    return -1;
2077
}
2078

    
2079
/**
2080
 * Mimic alloc_tables(), but for every context thread.
2081
 */
2082
static void clone_tables(H264Context *dst, H264Context *src){
2083
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
2084
    dst->non_zero_count           = src->non_zero_count;
2085
    dst->slice_table              = src->slice_table;
2086
    dst->cbp_table                = src->cbp_table;
2087
    dst->mb2b_xy                  = src->mb2b_xy;
2088
    dst->mb2b8_xy                 = src->mb2b8_xy;
2089
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
2090
    dst->mvd_table[0]             = src->mvd_table[0];
2091
    dst->mvd_table[1]             = src->mvd_table[1];
2092
    dst->direct_table             = src->direct_table;
2093

    
2094
    dst->s.obmc_scratchpad = NULL;
2095
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
2096
}
2097

    
2098
/**
2099
 * Init context
2100
 * Allocate buffers which are not shared amongst multiple threads.
2101
 */
2102
static int context_init(H264Context *h){
2103
    CHECKED_ALLOCZ(h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2104
    CHECKED_ALLOCZ(h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2105

    
2106
    return 0;
2107
fail:
2108
    return -1; // free_tables will clean up for us
2109
}
2110

    
2111
static av_cold void common_init(H264Context *h){
2112
    MpegEncContext * const s = &h->s;
2113

    
2114
    s->width = s->avctx->width;
2115
    s->height = s->avctx->height;
2116
    s->codec_id= s->avctx->codec->id;
2117

    
2118
    ff_h264_pred_init(&h->hpc, s->codec_id);
2119

    
2120
    h->dequant_coeff_pps= -1;
2121
    s->unrestricted_mv=1;
2122
    s->decode=1; //FIXME
2123

    
2124
    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
2125
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
2126
}
2127

    
2128
static av_cold int decode_init(AVCodecContext *avctx){
2129
    H264Context *h= avctx->priv_data;
2130
    MpegEncContext * const s = &h->s;
2131

    
2132
    MPV_decode_defaults(s);
2133

    
2134
    s->avctx = avctx;
2135
    common_init(h);
2136

    
2137
    s->out_format = FMT_H264;
2138
    s->workaround_bugs= avctx->workaround_bugs;
2139

    
2140
    // set defaults
2141
//    s->decode_mb= ff_h263_decode_mb;
2142
    s->quarter_sample = 1;
2143
    s->low_delay= 1;
2144

    
2145
    if(avctx->codec_id == CODEC_ID_SVQ3)
2146
        avctx->pix_fmt= PIX_FMT_YUVJ420P;
2147
    else
2148
        avctx->pix_fmt= PIX_FMT_YUV420P;
2149

    
2150
    decode_init_vlc();
2151

    
2152
    if(avctx->extradata_size > 0 && avctx->extradata &&
2153
       *(char *)avctx->extradata == 1){
2154
        h->is_avc = 1;
2155
        h->got_avcC = 0;
2156
    } else {
2157
        h->is_avc = 0;
2158
    }
2159

    
2160
    h->thread_context[0] = h;
2161
    h->outputed_poc = INT_MIN;
2162
    h->prev_poc_msb= 1<<16;
2163
    return 0;
2164
}
2165

    
2166
static int frame_start(H264Context *h){
2167
    MpegEncContext * const s = &h->s;
2168
    int i;
2169

    
2170
    if(MPV_frame_start(s, s->avctx) < 0)
2171
        return -1;
2172
    ff_er_frame_start(s);
2173
    /*
2174
     * MPV_frame_start uses pict_type to derive key_frame.
2175
     * This is incorrect for H.264; IDR markings must be used.
2176
     * Zero here; IDR markings per slice in frame or fields are ORed in later.
2177
     * See decode_nal_units().
2178
     */
2179
    s->current_picture_ptr->key_frame= 0;
2180

    
2181
    assert(s->linesize && s->uvlinesize);
2182

    
2183
    for(i=0; i<16; i++){
2184
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
2185
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
2186
    }
2187
    for(i=0; i<4; i++){
2188
        h->block_offset[16+i]=
2189
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2190
        h->block_offset[24+16+i]=
2191
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2192
    }
2193

    
2194
    /* can't be in alloc_tables because linesize isn't known there.
2195
     * FIXME: redo bipred weight to not require extra buffer? */
2196
    for(i = 0; i < s->avctx->thread_count; i++)
2197
        if(!h->thread_context[i]->s.obmc_scratchpad)
2198
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
2199

    
2200
    /* some macroblocks will be accessed before they're available */
2201
    if(FRAME_MBAFF || s->avctx->thread_count > 1)
2202
        memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
2203

    
2204
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
2205

    
2206
    // We mark the current picture as non-reference after allocating it, so
2207
    // that if we break out due to an error it can be released automatically
2208
    // in the next MPV_frame_start().
2209
    // SVQ3 as well as most other codecs have only last/next/current and thus
2210
    // get released even with set reference, besides SVQ3 and others do not
2211
    // mark frames as reference later "naturally".
2212
    if(s->codec_id != CODEC_ID_SVQ3)
2213
        s->current_picture_ptr->reference= 0;
2214

    
2215
    s->current_picture_ptr->field_poc[0]=
2216
    s->current_picture_ptr->field_poc[1]= INT_MAX;
2217
    assert(s->current_picture_ptr->long_ref==0);
2218

    
2219
    return 0;
2220
}
2221

    
2222
static inline void backup_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple){
2223
    MpegEncContext * const s = &h->s;
2224
    int i;
2225
    int step    = 1;
2226
    int offset  = 1;
2227
    int uvoffset= 1;
2228
    int top_idx = 1;
2229
    int skiplast= 0;
2230

    
2231
    src_y  -=   linesize;
2232
    src_cb -= uvlinesize;
2233
    src_cr -= uvlinesize;
2234

    
2235
    if(!simple && FRAME_MBAFF){
2236
        if(s->mb_y&1){
2237
            offset  = MB_MBAFF ? 1 : 17;
2238
            uvoffset= MB_MBAFF ? 1 : 9;
2239
            if(!MB_MBAFF){
2240
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 0)= *(uint64_t*)(src_y +  15*linesize);
2241
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 8)= *(uint64_t*)(src_y +8+15*linesize);
2242
                if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2243
                    *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+7*uvlinesize);
2244
                    *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+7*uvlinesize);
2245
                }
2246
            }
2247
        }else{
2248
            if(!MB_MBAFF){
2249
                h->left_border[0]= h->top_borders[0][s->mb_x][15];
2250
                if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2251
                    h->left_border[34   ]= h->top_borders[0][s->mb_x][16+7  ];
2252
                    h->left_border[34+18]= h->top_borders[0][s->mb_x][16+8+7];
2253
                }
2254
                skiplast= 1;
2255
            }
2256
            offset  =
2257
            uvoffset=
2258
            top_idx = MB_MBAFF ? 0 : 1;
2259
        }
2260
        step= MB_MBAFF ? 2 : 1;
2261
    }
2262

    
2263
    // There are two lines saved, the line above the the top macroblock of a pair,
2264
    // and the line above the bottom macroblock
2265
    h->left_border[offset]= h->top_borders[top_idx][s->mb_x][15];
2266
    for(i=1; i<17 - skiplast; i++){
2267
        h->left_border[offset+i*step]= src_y[15+i*  linesize];
2268
    }
2269

    
2270
    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0)= *(uint64_t*)(src_y +  16*linesize);
2271
    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8)= *(uint64_t*)(src_y +8+16*linesize);
2272

    
2273
    if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2274
        h->left_border[uvoffset+34   ]= h->top_borders[top_idx][s->mb_x][16+7];
2275
        h->left_border[uvoffset+34+18]= h->top_borders[top_idx][s->mb_x][24+7];
2276
        for(i=1; i<9 - skiplast; i++){
2277
            h->left_border[uvoffset+34   +i*step]= src_cb[7+i*uvlinesize];
2278
            h->left_border[uvoffset+34+18+i*step]= src_cr[7+i*uvlinesize];
2279
        }
2280
        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16)= *(uint64_t*)(src_cb+8*uvlinesize);
2281
        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24)= *(uint64_t*)(src_cr+8*uvlinesize);
2282
    }
2283
}
2284

    
2285
static inline void xchg_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int xchg, int simple){
2286
    MpegEncContext * const s = &h->s;
2287
    int temp8, i;
2288
    uint64_t temp64;
2289
    int deblock_left;
2290
    int deblock_top;
2291
    int mb_xy;
2292
    int step    = 1;
2293
    int offset  = 1;
2294
    int uvoffset= 1;
2295
    int top_idx = 1;
2296

    
2297
    if(!simple && FRAME_MBAFF){
2298
        if(s->mb_y&1){
2299
            offset  = MB_MBAFF ? 1 : 17;
2300
            uvoffset= MB_MBAFF ? 1 : 9;
2301
        }else{
2302
            offset  =
2303
            uvoffset=
2304
            top_idx = MB_MBAFF ? 0 : 1;
2305
        }
2306
        step= MB_MBAFF ? 2 : 1;
2307
    }
2308

    
2309
    if(h->deblocking_filter == 2) {
2310
        mb_xy = h->mb_xy;
2311
        deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
2312
        deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
2313
    } else {
2314
        deblock_left = (s->mb_x > 0);
2315
        deblock_top =  (s->mb_y > !!MB_FIELD);
2316
    }
2317

    
2318
    src_y  -=   linesize + 1;
2319
    src_cb -= uvlinesize + 1;
2320
    src_cr -= uvlinesize + 1;
2321

    
2322
#define XCHG(a,b,t,xchg)\
2323
t= a;\
2324
if(xchg)\
2325
    a= b;\
2326
b= t;
2327

    
2328
    if(deblock_left){
2329
        for(i = !deblock_top; i<16; i++){
2330
            XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, xchg);
2331
        }
2332
        XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, 1);
2333
    }
2334

    
2335
    if(deblock_top){
2336
        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2337
        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2338
        if(s->mb_x+1 < s->mb_width){
2339
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2340
        }
2341
    }
2342

    
2343
    if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2344
        if(deblock_left){
2345
            for(i = !deblock_top; i<8; i++){
2346
                XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, xchg);
2347
                XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, xchg);
2348
            }
2349
            XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, 1);
2350
            XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, 1);
2351
        }
2352
        if(deblock_top){
2353
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2354
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2355
        }
2356
    }
2357
}
2358

    
2359
static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
2360
    MpegEncContext * const s = &h->s;
2361
    const int mb_x= s->mb_x;
2362
    const int mb_y= s->mb_y;
2363
    const int mb_xy= h->mb_xy;
2364
    const int mb_type= s->current_picture.mb_type[mb_xy];
2365
    uint8_t  *dest_y, *dest_cb, *dest_cr;
2366
    int linesize, uvlinesize /*dct_offset*/;
2367
    int i;
2368
    int *block_offset = &h->block_offset[0];
2369
    const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
2370
    const int is_h264 = simple || s->codec_id == CODEC_ID_H264;
2371
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
2372
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
2373

    
2374
    dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2375
    dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2376
    dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2377

    
2378
    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
2379
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
2380

    
2381
    if (!simple && MB_FIELD) {
2382
        linesize   = h->mb_linesize   = s->linesize * 2;
2383
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2384
        block_offset = &h->block_offset[24];
2385
        if(mb_y&1){ //FIXME move out of this function?
2386
            dest_y -= s->linesize*15;
2387
            dest_cb-= s->uvlinesize*7;
2388
            dest_cr-= s->uvlinesize*7;
2389
        }
2390
        if(FRAME_MBAFF) {
2391
            int list;
2392
            for(list=0; list<h->list_count; list++){
2393
                if(!USES_LIST(mb_type, list))
2394
                    continue;
2395
                if(IS_16X16(mb_type)){
2396
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
2397
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
2398
                }else{
2399
                    for(i=0; i<16; i+=4){
2400
                        int ref = h->ref_cache[list][scan8[i]];
2401
                        if(ref >= 0)
2402
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
2403
                    }
2404
                }
2405
            }
2406
        }
2407
    } else {
2408
        linesize   = h->mb_linesize   = s->linesize;
2409
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2410
//        dct_offset = s->linesize * 16;
2411
    }
2412

    
2413
    if (!simple && IS_INTRA_PCM(mb_type)) {
2414
        for (i=0; i<16; i++) {
2415
            memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
2416
        }
2417
        for (i=0; i<8; i++) {
2418
            memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
2419
            memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
2420
        }
2421
    } else {
2422
        if(IS_INTRA(mb_type)){
2423
            if(h->deblocking_filter)
2424
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
2425

    
2426
            if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2427
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
2428
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2429
            }
2430

    
2431
            if(IS_INTRA4x4(mb_type)){
2432
                if(simple || !s->encoding){
2433
                    if(IS_8x8DCT(mb_type)){
2434
                        if(transform_bypass){
2435
                            idct_dc_add =
2436
                            idct_add    = s->dsp.add_pixels8;
2437
                        }else{
2438
                            idct_dc_add = s->dsp.h264_idct8_dc_add;
2439
                            idct_add    = s->dsp.h264_idct8_add;
2440
                        }
2441
                        for(i=0; i<16; i+=4){
2442
                            uint8_t * const ptr= dest_y + block_offset[i];
2443
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2444
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2445
                                h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
2446
                            }else{
2447
                                const int nnz = h->non_zero_count_cache[ scan8[i] ];
2448
                                h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
2449
                                                            (h->topright_samples_available<<i)&0x4000, linesize);
2450
                                if(nnz){
2451
                                    if(nnz == 1 && h->mb[i*16])
2452
                                        idct_dc_add(ptr, h->mb + i*16, linesize);
2453
                                    else
2454
                                        idct_add   (ptr, h->mb + i*16, linesize);
2455
                                }
2456
                            }
2457
                        }
2458
                    }else{
2459
                        if(transform_bypass){
2460
                            idct_dc_add =
2461
                            idct_add    = s->dsp.add_pixels4;
2462
                        }else{
2463
                            idct_dc_add = s->dsp.h264_idct_dc_add;
2464
                            idct_add    = s->dsp.h264_idct_add;
2465
                        }
2466
                        for(i=0; i<16; i++){
2467
                            uint8_t * const ptr= dest_y + block_offset[i];
2468
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2469

    
2470
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2471
                                h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
2472
                            }else{
2473
                                uint8_t *topright;
2474
                                int nnz, tr;
2475
                                if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
2476
                                    const int topright_avail= (h->topright_samples_available<<i)&0x8000;
2477
                                    assert(mb_y || linesize <= block_offset[i]);
2478
                                    if(!topright_avail){
2479
                                        tr= ptr[3 - linesize]*0x01010101;
2480
                                        topright= (uint8_t*) &tr;
2481
                                    }else
2482
                                        topright= ptr + 4 - linesize;
2483
                                }else
2484
                                    topright= NULL;
2485

    
2486
                                h->hpc.pred4x4[ dir ](ptr, topright, linesize);
2487
                                nnz = h->non_zero_count_cache[ scan8[i] ];
2488
                                if(nnz){
2489
                                    if(is_h264){
2490
                                        if(nnz == 1 && h->mb[i*16])
2491
                                            idct_dc_add(ptr, h->mb + i*16, linesize);
2492
                                        else
2493
                                            idct_add   (ptr, h->mb + i*16, linesize);
2494
                                    }else
2495
                                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
2496
                                }
2497
                            }
2498
                        }
2499
                    }
2500
                }
2501
            }else{
2502
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
2503
                if(is_h264){
2504
                    if(!transform_bypass)
2505
                        h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
2506
                }else
2507
                    svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
2508
            }
2509
            if(h->deblocking_filter)
2510
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
2511
        }else if(is_h264){
2512
            hl_motion(h, dest_y, dest_cb, dest_cr,
2513
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2514
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2515
                      s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
2516
        }
2517

    
2518

    
2519
        if(!IS_INTRA4x4(mb_type)){
2520
            if(is_h264){
2521
                if(IS_INTRA16x16(mb_type)){
2522
                    if(transform_bypass){
2523
                        if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
2524
                            h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
2525
                        }else{
2526
                            for(i=0; i<16; i++){
2527
                                if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2528
                                    s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
2529
                            }
2530
                        }
2531
                    }else{
2532
                         s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2533
                    }
2534
                }else if(h->cbp&15){
2535
                    if(transform_bypass){
2536
                        const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2537
                        idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
2538
                        for(i=0; i<16; i+=di){
2539
                            if(h->non_zero_count_cache[ scan8[i] ]){
2540
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2541
                            }
2542
                        }
2543
                    }else{
2544
                        if(IS_8x8DCT(mb_type)){
2545
                            s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2546
                        }else{
2547
                            s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2548
                        }
2549
                    }
2550
                }
2551
            }else{
2552
                for(i=0; i<16; i++){
2553
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
2554
                        uint8_t * const ptr= dest_y + block_offset[i];
2555
                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
2556
                    }
2557
                }
2558
            }
2559
        }
2560

    
2561
        if((simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
2562
            uint8_t *dest[2] = {dest_cb, dest_cr};
2563
            if(transform_bypass){
2564
                idct_add = s->dsp.add_pixels4;
2565
                if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
2566
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
2567
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
2568
                }else{
2569
                    for(i=16; i<16+8; i++){
2570
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2571
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2572
                    }
2573
                }
2574
            }else{
2575
                idct_add = s->dsp.h264_idct_add;
2576
                idct_dc_add = s->dsp.h264_idct_dc_add;
2577
                chroma_dc_dequant_idct_c(h->mb + 16*16, h->chroma_qp[0], h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
2578
                chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->chroma_qp[1], h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
2579
                if(is_h264){
2580
                    for(i=16; i<16+8; i++){
2581
                        if(h->non_zero_count_cache[ scan8[i] ])
2582
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2583
                        else if(h->mb[i*16])
2584
                            idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2585
                    }
2586
                }else{
2587
                    for(i=16; i<16+8; i++){
2588
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
2589
                            uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
2590
                            svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, chroma_qp[s->qscale + 12] - 12, 2);
2591
                        }
2592
                    }
2593
                }
2594
            }
2595
        }
2596
    }
2597
    if(h->deblocking_filter) {
2598
        backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
2599
        fill_caches(h, mb_type, 1); //FIXME don't fill stuff which isn't used by filter_mb
2600
        h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2601
        h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2602
        if (!simple && FRAME_MBAFF) {
2603
            filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2604
        } else {
2605
            filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2606
        }
2607
    }
2608
}
2609

    
2610
/**
2611
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
2612
 */
2613
static void hl_decode_mb_simple(H264Context *h){
2614
    hl_decode_mb_internal(h, 1);
2615
}
2616

    
2617
/**
2618
 * Process a macroblock; this handles edge cases, such as interlacing.
2619
 */
2620
static void av_noinline hl_decode_mb_complex(H264Context *h){
2621
    hl_decode_mb_internal(h, 0);
2622
}
2623

    
2624
static void hl_decode_mb(H264Context *h){
2625
    MpegEncContext * const s = &h->s;
2626
    const int mb_xy= h->mb_xy;
2627
    const int mb_type= s->current_picture.mb_type[mb_xy];
2628
    int is_complex = ENABLE_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
2629

    
2630
    if(ENABLE_H264_ENCODER && !s->decode)
2631
        return;
2632

    
2633
    if (is_complex)
2634
        hl_decode_mb_complex(h);
2635
    else hl_decode_mb_simple(h);
2636
}
2637

    
2638
static void pic_as_field(Picture *pic, const int parity){
2639
    int i;
2640
    for (i = 0; i < 4; ++i) {
2641
        if (parity == PICT_BOTTOM_FIELD)
2642
            pic->data[i] += pic->linesize[i];
2643
        pic->reference = parity;
2644
        pic->linesize[i] *= 2;
2645
    }
2646
    pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD];
2647
}
2648

    
2649
static int split_field_copy(Picture *dest, Picture *src,
2650
                            int parity, int id_add){
2651
    int match = !!(src->reference & parity);
2652

    
2653
    if (match) {
2654
        *dest = *src;
2655
        if(parity != PICT_FRAME){
2656
            pic_as_field(dest, parity);
2657
            dest->pic_id *= 2;
2658
            dest->pic_id += id_add;
2659
        }
2660
    }
2661

    
2662
    return match;
2663
}
2664

    
2665
static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){
2666
    int i[2]={0};
2667
    int index=0;
2668

    
2669
    while(i[0]<len || i[1]<len){
2670
        while(i[0]<len && !(in[ i[0] ] && (in[ i[0] ]->reference & sel)))
2671
            i[0]++;
2672
        while(i[1]<len && !(in[ i[1] ] && (in[ i[1] ]->reference & (sel^3))))
2673
            i[1]++;
2674
        if(i[0] < len){
2675
            in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num;
2676
            split_field_copy(&def[index++], in[ i[0]++ ], sel  , 1);
2677
        }
2678
        if(i[1] < len){
2679
            in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num;
2680
            split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0);
2681
        }
2682
    }
2683

    
2684
    return index;
2685
}
2686

    
2687
static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){
2688
    int i, best_poc;
2689
    int out_i= 0;
2690

    
2691
    for(;;){
2692
        best_poc= dir ? INT_MIN : INT_MAX;
2693

    
2694
        for(i=0; i<len; i++){
2695
            const int poc= src[i]->poc;
2696
            if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){
2697
                best_poc= poc;
2698
                sorted[out_i]= src[i];
2699
            }
2700
        }
2701
        if(best_poc == (dir ? INT_MIN : INT_MAX))
2702
            break;
2703
        limit= sorted[out_i++]->poc - dir;
2704
    }
2705
    return out_i;
2706
}
2707

    
2708
/**
2709
 * fills the default_ref_list.
2710
 */
2711
static int fill_default_ref_list(H264Context *h){
2712
    MpegEncContext * const s = &h->s;
2713
    int i, len;
2714

    
2715
    if(h->slice_type_nos==FF_B_TYPE){
2716
        Picture *sorted[32];
2717
        int cur_poc, list;
2718
        int lens[2];
2719

    
2720
        if(FIELD_PICTURE)
2721
            cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
2722
        else
2723
            cur_poc= s->current_picture_ptr->poc;
2724

    
2725
        for(list= 0; list<2; list++){
2726
            len= add_sorted(sorted    , h->short_ref, h->short_ref_count, cur_poc, 1^list);
2727
            len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list);
2728
            assert(len<=32);
2729
            len= build_def_list(h->default_ref_list[list]    , sorted     , len, 0, s->picture_structure);
2730
            len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
2731
            assert(len<=32);
2732

    
2733
            if(len < h->ref_count[list])
2734
                memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len));
2735
            lens[list]= len;
2736
        }
2737

    
2738
        if(lens[0] == lens[1] && lens[1] > 1){
2739
            for(i=0; h->default_ref_list[0][i].data[0] == h->default_ref_list[1][i].data[0] && i<lens[0]; i++);
2740
            if(i == lens[0])
2741
                FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
2742
        }
2743
    }else{
2744
        len = build_def_list(h->default_ref_list[0]    , h->short_ref, h->short_ref_count, 0, s->picture_structure);
2745
        len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16                , 1, s->picture_structure);
2746
        assert(len <= 32);
2747
        if(len < h->ref_count[0])
2748
            memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len));
2749
    }
2750
#ifdef TRACE
2751
    for (i=0; i<h->ref_count[0]; i++) {
2752
        tprintf(h->s.avctx, "List0: %s fn:%d 0x%p\n", (h->default_ref_list[0][i].long_ref ? "LT" : "ST"), h->default_ref_list[0][i].pic_id, h->default_ref_list[0][i].data[0]);
2753
    }
2754
    if(h->slice_type_nos==FF_B_TYPE){
2755
        for (i=0; i<h->ref_count[1]; i++) {
2756
            tprintf(h->s.avctx, "List1: %s fn:%d 0x%p\n", (h->default_ref_list[1][i].long_ref ? "LT" : "ST"), h->default_ref_list[1][i].pic_id, h->default_ref_list[1][i].data[0]);
2757
        }
2758
    }
2759
#endif
2760
    return 0;
2761
}
2762

    
2763
static void print_short_term(H264Context *h);
2764
static void print_long_term(H264Context *h);
2765

    
2766
/**
2767
 * Extract structure information about the picture described by pic_num in
2768
 * the current decoding context (frame or field). Note that pic_num is
2769
 * picture number without wrapping (so, 0<=pic_num<max_pic_num).
2770
 * @param pic_num picture number for which to extract structure information
2771
 * @param structure one of PICT_XXX describing structure of picture
2772
 *                      with pic_num
2773
 * @return frame number (short term) or long term index of picture
2774
 *         described by pic_num
2775
 */
2776
static int pic_num_extract(H264Context *h, int pic_num, int *structure){
2777
    MpegEncContext * const s = &h->s;
2778

    
2779
    *structure = s->picture_structure;
2780
    if(FIELD_PICTURE){
2781
        if (!(pic_num & 1))
2782
            /* opposite field */
2783
            *structure ^= PICT_FRAME;
2784
        pic_num >>= 1;
2785
    }
2786

    
2787
    return pic_num;
2788
}
2789

    
2790
static int decode_ref_pic_list_reordering(H264Context *h){
2791
    MpegEncContext * const s = &h->s;
2792
    int list, index, pic_structure;
2793

    
2794
    print_short_term(h);
2795
    print_long_term(h);
2796

    
2797
    for(list=0; list<h->list_count; list++){
2798
        memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
2799

    
2800
        if(get_bits1(&s->gb)){
2801
            int pred= h->curr_pic_num;
2802

    
2803
            for(index=0; ; index++){
2804
                unsigned int reordering_of_pic_nums_idc= get_ue_golomb(&s->gb);
2805
                unsigned int pic_id;
2806
                int i;
2807
                Picture *ref = NULL;
2808

    
2809
                if(reordering_of_pic_nums_idc==3)
2810
                    break;
2811

    
2812
                if(index >= h->ref_count[list]){
2813
                    av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
2814
                    return -1;
2815
                }
2816

    
2817
                if(reordering_of_pic_nums_idc<3){
2818
                    if(reordering_of_pic_nums_idc<2){
2819
                        const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
2820
                        int frame_num;
2821

    
2822
                        if(abs_diff_pic_num > h->max_pic_num){
2823
                            av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
2824
                            return -1;
2825
                        }
2826

    
2827
                        if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
2828
                        else                                pred+= abs_diff_pic_num;
2829
                        pred &= h->max_pic_num - 1;
2830

    
2831
                        frame_num = pic_num_extract(h, pred, &pic_structure);
2832

    
2833
                        for(i= h->short_ref_count-1; i>=0; i--){
2834
                            ref = h->short_ref[i];
2835
                            assert(ref->reference);
2836
                            assert(!ref->long_ref);
2837
                            if(
2838
                                   ref->frame_num == frame_num &&
2839
                                   (ref->reference & pic_structure)
2840
                              )
2841
                                break;
2842
                        }
2843
                        if(i>=0)
2844
                            ref->pic_id= pred;
2845
                    }else{
2846
                        int long_idx;
2847
                        pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx
2848

    
2849
                        long_idx= pic_num_extract(h, pic_id, &pic_structure);
2850

    
2851
                        if(long_idx>31){
2852
                            av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
2853
                            return -1;
2854
                        }
2855
                        ref = h->long_ref[long_idx];
2856
                        assert(!(ref && !ref->reference));
2857
                        if(ref && (ref->reference & pic_structure)){
2858
                            ref->pic_id= pic_id;
2859
                            assert(ref->long_ref);
2860
                            i=0;
2861
                        }else{
2862
                            i=-1;
2863
                        }
2864
                    }
2865

    
2866
                    if (i < 0) {
2867
                        av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
2868
                        memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME
2869
                    } else {
2870
                        for(i=index; i+1<h->ref_count[list]; i++){
2871
                            if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
2872
                                break;
2873
                        }
2874
                        for(; i > index; i--){
2875
                            h->ref_list[list][i]= h->ref_list[list][i-1];
2876
                        }
2877
                        h->ref_list[list][index]= *ref;
2878
                        if (FIELD_PICTURE){
2879
                            pic_as_field(&h->ref_list[list][index], pic_structure);
2880
                        }
2881
                    }
2882
                }else{
2883
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
2884
                    return -1;
2885
                }
2886
            }
2887
        }
2888
    }
2889
    for(list=0; list<h->list_count; list++){
2890
        for(index= 0; index < h->ref_count[list]; index++){
2891
            if(!h->ref_list[list][index].data[0]){
2892
                av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
2893
                h->ref_list[list][index]= s->current_picture; //FIXME this is not a sensible solution
2894
            }
2895
        }
2896
    }
2897

    
2898
    return 0;
2899
}
2900

    
2901
static void fill_mbaff_ref_list(H264Context *h){
2902
    int list, i, j;
2903
    for(list=0; list<2; list++){ //FIXME try list_count
2904
        for(i=0; i<h->ref_count[list]; i++){
2905
            Picture *frame = &h->ref_list[list][i];
2906
            Picture *field = &h->ref_list[list][16+2*i];
2907
            field[0] = *frame;
2908
            for(j=0; j<3; j++)
2909
                field[0].linesize[j] <<= 1;
2910
            field[0].reference = PICT_TOP_FIELD;
2911
            field[0].poc= field[0].field_poc[0];
2912
            field[1] = field[0];
2913
            for(j=0; j<3; j++)
2914
                field[1].data[j] += frame->linesize[j];
2915
            field[1].reference = PICT_BOTTOM_FIELD;
2916
            field[1].poc= field[1].field_poc[1];
2917

    
2918
            h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
2919
            h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
2920
            for(j=0; j<2; j++){
2921
                h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
2922
                h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
2923
            }
2924
        }
2925
    }
2926
    for(j=0; j<h->ref_count[1]; j++){
2927
        for(i=0; i<h->ref_count[0]; i++)
2928
            h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
2929
        memcpy(h->implicit_weight[16+2*j],   h->implicit_weight[j], sizeof(*h->implicit_weight));
2930
        memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
2931
    }
2932
}
2933

    
2934
static int pred_weight_table(H264Context *h){
2935
    MpegEncContext * const s = &h->s;
2936
    int list, i;
2937
    int luma_def, chroma_def;
2938

    
2939
    h->use_weight= 0;
2940
    h->use_weight_chroma= 0;
2941
    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
2942
    h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
2943
    luma_def = 1<<h->luma_log2_weight_denom;
2944
    chroma_def = 1<<h->chroma_log2_weight_denom;
2945

    
2946
    for(list=0; list<2; list++){
2947
        for(i=0; i<h->ref_count[list]; i++){
2948
            int luma_weight_flag, chroma_weight_flag;
2949

    
2950
            luma_weight_flag= get_bits1(&s->gb);
2951
            if(luma_weight_flag){
2952
                h->luma_weight[list][i]= get_se_golomb(&s->gb);
2953
                h->luma_offset[list][i]= get_se_golomb(&s->gb);
2954
                if(   h->luma_weight[list][i] != luma_def
2955
                   || h->luma_offset[list][i] != 0)
2956
                    h->use_weight= 1;
2957
            }else{
2958
                h->luma_weight[list][i]= luma_def;
2959
                h->luma_offset[list][i]= 0;
2960
            }
2961

    
2962
            if(CHROMA){
2963
                chroma_weight_flag= get_bits1(&s->gb);
2964
                if(chroma_weight_flag){
2965
                    int j;
2966
                    for(j=0; j<2; j++){
2967
                        h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
2968
                        h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
2969
                        if(   h->chroma_weight[list][i][j] != chroma_def
2970
                        || h->chroma_offset[list][i][j] != 0)
2971
                            h->use_weight_chroma= 1;
2972
                    }
2973
                }else{
2974
                    int j;
2975
                    for(j=0; j<2; j++){
2976
                        h->chroma_weight[list][i][j]= chroma_def;
2977
                        h->chroma_offset[list][i][j]= 0;
2978
                    }
2979
                }
2980
            }
2981
        }
2982
        if(h->slice_type_nos != FF_B_TYPE) break;
2983
    }
2984
    h->use_weight= h->use_weight || h->use_weight_chroma;
2985
    return 0;
2986
}
2987

    
2988
static void implicit_weight_table(H264Context *h){
2989
    MpegEncContext * const s = &h->s;
2990
    int ref0, ref1;
2991
    int cur_poc = s->current_picture_ptr->poc;
2992

    
2993
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
2994
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
2995
        h->use_weight= 0;
2996
        h->use_weight_chroma= 0;
2997
        return;
2998
    }
2999

    
3000
    h->use_weight= 2;
3001
    h->use_weight_chroma= 2;
3002
    h->luma_log2_weight_denom= 5;
3003
    h->chroma_log2_weight_denom= 5;
3004

    
3005
    for(ref0=0; ref0 < h->ref_count[0]; ref0++){
3006
        int poc0 = h->ref_list[0][ref0].poc;
3007
        for(ref1=0; ref1 < h->ref_count[1]; ref1++){
3008
            int poc1 = h->ref_list[1][ref1].poc;
3009
            int td = av_clip(poc1 - poc0, -128, 127);
3010
            if(td){
3011
                int tb = av_clip(cur_poc - poc0, -128, 127);
3012
                int tx = (16384 + (FFABS(td) >> 1)) / td;
3013
                int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
3014
                if(dist_scale_factor < -64 || dist_scale_factor > 128)
3015
                    h->implicit_weight[ref0][ref1] = 32;
3016
                else
3017
                    h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
3018
            }else
3019
                h->implicit_weight[ref0][ref1] = 32;
3020
        }
3021
    }
3022
}
3023

    
3024
/**
3025
 * Mark a picture as no longer needed for reference. The refmask
3026
 * argument allows unreferencing of individual fields or the whole frame.
3027
 * If the picture becomes entirely unreferenced, but is being held for
3028
 * display purposes, it is marked as such.
3029
 * @param refmask mask of fields to unreference; the mask is bitwise
3030
 *                anded with the reference marking of pic
3031
 * @return non-zero if pic becomes entirely unreferenced (except possibly
3032
 *         for display purposes) zero if one of the fields remains in
3033
 *         reference
3034
 */
3035
static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){
3036
    int i;
3037
    if (pic->reference &= refmask) {
3038
        return 0;
3039
    } else {
3040
        for(i = 0; h->delayed_pic[i]; i++)
3041
            if(pic == h->delayed_pic[i]){
3042
                pic->reference=DELAYED_PIC_REF;
3043
                break;
3044
            }
3045
        return 1;
3046
    }
3047
}
3048

    
3049
/**
3050
 * instantaneous decoder refresh.
3051
 */
3052
static void idr(H264Context *h){
3053
    int i;
3054

    
3055
    for(i=0; i<16; i++){
3056
        remove_long(h, i, 0);
3057
    }
3058
    assert(h->long_ref_count==0);
3059

    
3060
    for(i=0; i<h->short_ref_count; i++){
3061
        unreference_pic(h, h->short_ref[i], 0);
3062
        h->short_ref[i]= NULL;
3063
    }
3064
    h->short_ref_count=0;
3065
    h->prev_frame_num= 0;
3066
    h->prev_frame_num_offset= 0;
3067
    h->prev_poc_msb=
3068
    h->prev_poc_lsb= 0;
3069
}
3070

    
3071
/* forget old pics after a seek */
3072
static void flush_dpb(AVCodecContext *avctx){
3073
    H264Context *h= avctx->priv_data;
3074
    int i;
3075
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
3076
        if(h->delayed_pic[i])
3077
            h->delayed_pic[i]->reference= 0;
3078
        h->delayed_pic[i]= NULL;
3079
    }
3080
    h->outputed_poc= INT_MIN;
3081
    idr(h);
3082
    if(h->s.current_picture_ptr)
3083
        h->s.current_picture_ptr->reference= 0;
3084
    h->s.first_field= 0;
3085
    ff_mpeg_flush(avctx);
3086
}
3087

    
3088
/**
3089
 * Find a Picture in the short term reference list by frame number.
3090
 * @param frame_num frame number to search for
3091
 * @param idx the index into h->short_ref where returned picture is found
3092
 *            undefined if no picture found.
3093
 * @return pointer to the found picture, or NULL if no pic with the provided
3094
 *                 frame number is found
3095
 */
3096
static Picture * find_short(H264Context *h, int frame_num, int *idx){
3097
    MpegEncContext * const s = &h->s;
3098
    int i;
3099

    
3100
    for(i=0; i<h->short_ref_count; i++){
3101
        Picture *pic= h->short_ref[i];
3102
        if(s->avctx->debug&FF_DEBUG_MMCO)
3103
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
3104
        if(pic->frame_num == frame_num) {
3105
            *idx = i;
3106
            return pic;
3107
        }
3108
    }
3109
    return NULL;
3110
}
3111

    
3112
/**
3113
 * Remove a picture from the short term reference list by its index in
3114
 * that list.  This does no checking on the provided index; it is assumed
3115
 * to be valid. Other list entries are shifted down.
3116
 * @param i index into h->short_ref of picture to remove.
3117
 */
3118
static void remove_short_at_index(H264Context *h, int i){
3119
    assert(i >= 0 && i < h->short_ref_count);
3120
    h->short_ref[i]= NULL;
3121
    if (--h->short_ref_count)
3122
        memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*));
3123
}
3124

    
3125
/**
3126
 *
3127
 * @return the removed picture or NULL if an error occurs
3128
 */
3129
static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){
3130
    MpegEncContext * const s = &h->s;
3131
    Picture *pic;
3132
    int i;
3133

    
3134
    if(s->avctx->debug&FF_DEBUG_MMCO)
3135
        av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
3136

    
3137
    pic = find_short(h, frame_num, &i);
3138
    if (pic){
3139
        if(unreference_pic(h, pic, ref_mask))
3140
        remove_short_at_index(h, i);
3141
    }
3142

    
3143
    return pic;
3144
}
3145

    
3146
/**
3147
 * Remove a picture from the long term reference list by its index in
3148
 * that list.
3149
 * @return the removed picture or NULL if an error occurs
3150
 */
3151
static Picture * remove_long(H264Context *h, int i, int ref_mask){
3152
    Picture *pic;
3153

    
3154
    pic= h->long_ref[i];
3155
    if (pic){
3156
        if(unreference_pic(h, pic, ref_mask)){
3157
            assert(h->long_ref[i]->long_ref == 1);
3158
            h->long_ref[i]->long_ref= 0;
3159
            h->long_ref[i]= NULL;
3160
            h->long_ref_count--;
3161
        }
3162
    }
3163

    
3164
    return pic;
3165
}
3166

    
3167
/**
3168
 * print short term list
3169
 */
3170
static void print_short_term(H264Context *h) {
3171
    uint32_t i;
3172
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3173
        av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
3174
        for(i=0; i<h->short_ref_count; i++){
3175
            Picture *pic= h->short_ref[i];
3176
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3177
        }
3178
    }
3179
}
3180

    
3181
/**
3182
 * print long term list
3183
 */
3184
static void print_long_term(H264Context *h) {
3185
    uint32_t i;
3186
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3187
        av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
3188
        for(i = 0; i < 16; i++){
3189
            Picture *pic= h->long_ref[i];
3190
            if (pic) {
3191
                av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3192
            }
3193
        }
3194
    }
3195
}
3196

    
3197
/**
3198
 * Executes the reference picture marking (memory management control operations).
3199
 */
3200
static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
3201
    MpegEncContext * const s = &h->s;
3202
    int i, j;
3203
    int current_ref_assigned=0;
3204
    Picture *pic;
3205

    
3206
    if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
3207
        av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
3208

    
3209
    for(i=0; i<mmco_count; i++){
3210
        int structure, frame_num;
3211
        if(s->avctx->debug&FF_DEBUG_MMCO)
3212
            av_log(h->s.avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode, h->mmco[i].short_pic_num, h->mmco[i].long_arg);
3213

    
3214
        if(   mmco[i].opcode == MMCO_SHORT2UNUSED
3215
           || mmco[i].opcode == MMCO_SHORT2LONG){
3216
            frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
3217
            pic = find_short(h, frame_num, &j);
3218
            if(!pic){
3219
                if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg]
3220
                   || h->long_ref[mmco[i].long_arg]->frame_num != frame_num)
3221
                av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
3222
                continue;
3223
            }
3224
        }
3225

    
3226
        switch(mmco[i].opcode){
3227
        case MMCO_SHORT2UNUSED:
3228
            if(s->avctx->debug&FF_DEBUG_MMCO)
3229
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n", h->mmco[i].short_pic_num, h->short_ref_count);
3230
            remove_short(h, frame_num, structure ^ PICT_FRAME);
3231
            break;
3232
        case MMCO_SHORT2LONG:
3233
                if (h->long_ref[mmco[i].long_arg] != pic)
3234
                    remove_long(h, mmco[i].long_arg, 0);
3235

    
3236
                remove_short_at_index(h, j);
3237
                h->long_ref[ mmco[i].long_arg ]= pic;
3238
                if (h->long_ref[ mmco[i].long_arg ]){
3239
                    h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3240
                    h->long_ref_count++;
3241
                }
3242
            break;
3243
        case MMCO_LONG2UNUSED:
3244
            j = pic_num_extract(h, mmco[i].long_arg, &structure);
3245
            pic = h->long_ref[j];
3246
            if (pic) {
3247
                remove_long(h, j, structure ^ PICT_FRAME);
3248
            } else if(s->avctx->debug&FF_DEBUG_MMCO)
3249
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
3250
            break;
3251
        case MMCO_LONG:
3252
                    // Comment below left from previous code as it is an interresting note.
3253
                    /* First field in pair is in short term list or
3254
                     * at a different long term index.
3255
                     * This is not allowed; see 7.4.3.3, notes 2 and 3.
3256
                     * Report the problem and keep the pair where it is,
3257
                     * and mark this field valid.
3258
                     */
3259

    
3260
            if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) {
3261
                remove_long(h, mmco[i].long_arg, 0);
3262

    
3263
                h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
3264
                h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3265
                h->long_ref_count++;
3266
            }
3267

    
3268
            s->current_picture_ptr->reference |= s->picture_structure;
3269
            current_ref_assigned=1;
3270
            break;
3271
        case MMCO_SET_MAX_LONG:
3272
            assert(mmco[i].long_arg <= 16);
3273
            // just remove the long term which index is greater than new max
3274
            for(j = mmco[i].long_arg; j<16; j++){
3275
                remove_long(h, j, 0);
3276
            }
3277
            break;
3278
        case MMCO_RESET:
3279
            while(h->short_ref_count){
3280
                remove_short(h, h->short_ref[0]->frame_num, 0);
3281
            }
3282
            for(j = 0; j < 16; j++) {
3283
                remove_long(h, j, 0);
3284
            }
3285
            s->current_picture_ptr->poc=
3286
            s->current_picture_ptr->field_poc[0]=
3287
            s->current_picture_ptr->field_poc[1]=
3288
            h->poc_lsb=
3289
            h->poc_msb=
3290
            h->frame_num=
3291
            s->current_picture_ptr->frame_num= 0;
3292
            break;
3293
        default: assert(0);
3294
        }
3295
    }
3296

    
3297
    if (!current_ref_assigned) {
3298
        /* Second field of complementary field pair; the first field of
3299
         * which is already referenced. If short referenced, it
3300
         * should be first entry in short_ref. If not, it must exist
3301
         * in long_ref; trying to put it on the short list here is an
3302
         * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3).
3303
         */
3304
        if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) {
3305
            /* Just mark the second field valid */
3306
            s->current_picture_ptr->reference = PICT_FRAME;
3307
        } else if (s->current_picture_ptr->long_ref) {
3308
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
3309
                                             "assignment for second field "
3310
                                             "in complementary field pair "
3311
                                             "(first field is long term)\n");
3312
        } else {
3313
            pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
3314
            if(pic){
3315
                av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
3316
            }
3317

    
3318
            if(h->short_ref_count)
3319
                memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
3320

    
3321
            h->short_ref[0]= s->current_picture_ptr;
3322
            h->short_ref_count++;
3323
            s->current_picture_ptr->reference |= s->picture_structure;
3324
        }
3325
    }
3326

    
3327
    if (h->long_ref_count + h->short_ref_count > h->sps.ref_frame_count){
3328

    
3329
        /* We have too many reference frames, probably due to corrupted
3330
         * stream. Need to discard one frame. Prevents overrun of the
3331
         * short_ref and long_ref buffers.
3332
         */
3333
        av_log(h->s.avctx, AV_LOG_ERROR,
3334
               "number of reference frames exceeds max (probably "
3335
               "corrupt input), discarding one\n");
3336

    
3337
        if (h->long_ref_count && !h->short_ref_count) {
3338
            for (i = 0; i < 16; ++i)
3339
                if (h->long_ref[i])
3340
                    break;
3341

    
3342
            assert(i < 16);
3343
            remove_long(h, i, 0);
3344
        } else {
3345
            pic = h->short_ref[h->short_ref_count - 1];
3346
            remove_short(h, pic->frame_num, 0);
3347
        }
3348
    }
3349

    
3350
    print_short_term(h);
3351
    print_long_term(h);
3352
    return 0;
3353
}
3354

    
3355
static int decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
3356
    MpegEncContext * const s = &h->s;
3357
    int i;
3358

    
3359
    h->mmco_index= 0;
3360
    if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
3361
        s->broken_link= get_bits1(gb) -1;
3362
        if(get_bits1(gb)){
3363
            h->mmco[0].opcode= MMCO_LONG;
3364
            h->mmco[0].long_arg= 0;
3365
            h->mmco_index= 1;
3366
        }
3367
    }else{
3368
        if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag
3369
            for(i= 0; i<MAX_MMCO_COUNT; i++) {
3370
                MMCOOpcode opcode= get_ue_golomb(gb);
3371

    
3372
                h->mmco[i].opcode= opcode;
3373
                if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
3374
                    h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
3375
/*                    if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_pic_num ] == NULL){
3376
                        av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco);
3377
                        return -1;
3378
                    }*/
3379
                }
3380
                if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
3381
                    unsigned int long_arg= get_ue_golomb(gb);
3382
                    if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){
3383
                        av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
3384
                        return -1;
3385
                    }
3386
                    h->mmco[i].long_arg= long_arg;
3387
                }
3388

    
3389
                if(opcode > (unsigned)MMCO_LONG){
3390
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
3391
                    return -1;
3392
                }
3393
                if(opcode == MMCO_END)
3394
                    break;
3395
            }
3396
            h->mmco_index= i;
3397
        }else{
3398
            assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
3399

    
3400
            if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
3401
                    !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
3402
                h->mmco[0].opcode= MMCO_SHORT2UNUSED;
3403
                h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
3404
                h->mmco_index= 1;
3405
                if (FIELD_PICTURE) {
3406
                    h->mmco[0].short_pic_num *= 2;
3407
                    h->mmco[1].opcode= MMCO_SHORT2UNUSED;
3408
                    h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
3409
                    h->mmco_index= 2;
3410
                }
3411
            }
3412
        }
3413
    }
3414

    
3415
    return 0;
3416
}
3417

    
3418
static int init_poc(H264Context *h){
3419
    MpegEncContext * const s = &h->s;
3420
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
3421
    int field_poc[2];
3422
    Picture *cur = s->current_picture_ptr;
3423

    
3424
    h->frame_num_offset= h->prev_frame_num_offset;
3425
    if(h->frame_num < h->prev_frame_num)
3426
        h->frame_num_offset += max_frame_num;
3427

    
3428
    if(h->sps.poc_type==0){
3429
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
3430

    
3431
        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
3432
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
3433
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
3434
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
3435
        else
3436
            h->poc_msb = h->prev_poc_msb;
3437
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
3438
        field_poc[0] =
3439
        field_poc[1] = h->poc_msb + h->poc_lsb;
3440
        if(s->picture_structure == PICT_FRAME)
3441
            field_poc[1] += h->delta_poc_bottom;
3442
    }else if(h->sps.poc_type==1){
3443
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
3444
        int i;
3445

    
3446
        if(h->sps.poc_cycle_length != 0)
3447
            abs_frame_num = h->frame_num_offset + h->frame_num;
3448
        else
3449
            abs_frame_num = 0;
3450

    
3451
        if(h->nal_ref_idc==0 && abs_frame_num > 0)
3452
            abs_frame_num--;
3453

    
3454
        expected_delta_per_poc_cycle = 0;
3455
        for(i=0; i < h->sps.poc_cycle_length; i++)
3456
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
3457

    
3458
        if(abs_frame_num > 0){
3459
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
3460
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
3461

    
3462
            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
3463
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
3464
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
3465
        } else
3466
            expectedpoc = 0;
3467

    
3468
        if(h->nal_ref_idc == 0)
3469
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
3470

    
3471
        field_poc[0] = expectedpoc + h->delta_poc[0];
3472
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
3473

    
3474
        if(s->picture_structure == PICT_FRAME)
3475
            field_poc[1] += h->delta_poc[1];
3476
    }else{
3477
        int poc= 2*(h->frame_num_offset + h->frame_num);
3478

    
3479
        if(!h->nal_ref_idc)
3480
            poc--;
3481

    
3482
        field_poc[0]= poc;
3483
        field_poc[1]= poc;
3484
    }
3485

    
3486
    if(s->picture_structure != PICT_BOTTOM_FIELD)
3487
        s->current_picture_ptr->field_poc[0]= field_poc[0];
3488
    if(s->picture_structure != PICT_TOP_FIELD)
3489
        s->current_picture_ptr->field_poc[1]= field_poc[1];
3490
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
3491

    
3492
    return 0;
3493
}
3494

    
3495

    
3496
/**
3497
 * initialize scan tables
3498
 */
3499
static void init_scan_tables(H264Context *h){
3500
    MpegEncContext * const s = &h->s;
3501
    int i;
3502
    if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
3503
        memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
3504
        memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
3505
    }else{
3506
        for(i=0; i<16; i++){
3507
#define T(x) (x>>2) | ((x<<2) & 0xF)
3508
            h->zigzag_scan[i] = T(zigzag_scan[i]);
3509
            h-> field_scan[i] = T( field_scan[i]);
3510
#undef T
3511
        }
3512
    }
3513
    if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
3514
        memcpy(h->zigzag_scan8x8,       zigzag_scan8x8,       64*sizeof(uint8_t));
3515
        memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
3516
        memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
3517
        memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
3518
    }else{
3519
        for(i=0; i<64; i++){
3520
#define T(x) (x>>3) | ((x&7)<<3)
3521
            h->zigzag_scan8x8[i]       = T(zigzag_scan8x8[i]);
3522
            h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
3523
            h->field_scan8x8[i]        = T(field_scan8x8[i]);
3524
            h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
3525
#undef T
3526
        }
3527
    }
3528
    if(h->sps.transform_bypass){ //FIXME same ugly
3529
        h->zigzag_scan_q0          = zigzag_scan;
3530
        h->zigzag_scan8x8_q0       = zigzag_scan8x8;
3531
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
3532
        h->field_scan_q0           = field_scan;
3533
        h->field_scan8x8_q0        = field_scan8x8;
3534
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
3535
    }else{
3536
        h->zigzag_scan_q0          = h->zigzag_scan;
3537
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
3538
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
3539
        h->field_scan_q0           = h->field_scan;
3540
        h->field_scan8x8_q0        = h->field_scan8x8;
3541
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
3542
    }
3543
}
3544

    
3545
/**
3546
 * Replicates H264 "master" context to thread contexts.
3547
 */
3548
static void clone_slice(H264Context *dst, H264Context *src)
3549
{
3550
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
3551
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
3552
    dst->s.current_picture      = src->s.current_picture;
3553
    dst->s.linesize             = src->s.linesize;
3554
    dst->s.uvlinesize           = src->s.uvlinesize;
3555
    dst->s.first_field          = src->s.first_field;
3556

    
3557
    dst->prev_poc_msb           = src->prev_poc_msb;
3558
    dst->prev_poc_lsb           = src->prev_poc_lsb;
3559
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
3560
    dst->prev_frame_num         = src->prev_frame_num;
3561
    dst->short_ref_count        = src->short_ref_count;
3562

    
3563
    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
3564
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
3565
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
3566
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
3567

    
3568
    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
3569
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
3570
}
3571

    
3572
/**
3573
 * decodes a slice header.
3574
 * This will also call MPV_common_init() and frame_start() as needed.
3575
 *
3576
 * @param h h264context
3577
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
3578
 *
3579
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
3580
 */
3581
static int decode_slice_header(H264Context *h, H264Context *h0){
3582
    MpegEncContext * const s = &h->s;
3583
    MpegEncContext * const s0 = &h0->s;
3584
    unsigned int first_mb_in_slice;
3585
    unsigned int pps_id;
3586
    int num_ref_idx_active_override_flag;
3587
    unsigned int slice_type, tmp, i, j;
3588
    int default_ref_list_done = 0;
3589
    int last_pic_structure;
3590

    
3591
    s->dropable= h->nal_ref_idc == 0;
3592

    
3593
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
3594
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
3595
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
3596
    }else{
3597
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
3598
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
3599
    }
3600

    
3601
    first_mb_in_slice= get_ue_golomb(&s->gb);
3602

    
3603
    if((s->flags2 & CODEC_FLAG2_CHUNKS) && first_mb_in_slice == 0){
3604
        h0->current_slice = 0;
3605
        if (!s0->first_field)
3606
            s->current_picture_ptr= NULL;
3607
    }
3608

    
3609
    slice_type= get_ue_golomb(&s->gb);
3610
    if(slice_type > 9){
3611
        av_log(h->s.avctx, AV_LOG_ERROR, "slice type too large (%d) at %d %d\n", h->slice_type, s->mb_x, s->mb_y);
3612
        return -1;
3613
    }
3614
    if(slice_type > 4){
3615
        slice_type -= 5;
3616
        h->slice_type_fixed=1;
3617
    }else
3618
        h->slice_type_fixed=0;
3619

    
3620
    slice_type= golomb_to_pict_type[ slice_type ];
3621
    if (slice_type == FF_I_TYPE
3622
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
3623
        default_ref_list_done = 1;
3624
    }
3625
    h->slice_type= slice_type;
3626
    h->slice_type_nos= slice_type & 3;
3627

    
3628
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
3629
    if (s->pict_type == FF_B_TYPE && s0->last_picture_ptr == NULL) {
3630
        av_log(h->s.avctx, AV_LOG_ERROR,
3631
               "B picture before any references, skipping\n");
3632
        return -1;
3633
    }
3634

    
3635
    pps_id= get_ue_golomb(&s->gb);
3636
    if(pps_id>=MAX_PPS_COUNT){
3637
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
3638
        return -1;
3639
    }
3640
    if(!h0->pps_buffers[pps_id]) {
3641
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS referenced\n");
3642
        return -1;
3643
    }
3644
    h->pps= *h0->pps_buffers[pps_id];
3645

    
3646
    if(!h0->sps_buffers[h->pps.sps_id]) {
3647
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS referenced\n");
3648
        return -1;
3649
    }
3650
    h->sps = *h0->sps_buffers[h->pps.sps_id];
3651

    
3652
    if(h == h0 && h->dequant_coeff_pps != pps_id){
3653
        h->dequant_coeff_pps = pps_id;
3654
        init_dequant_tables(h);
3655
    }
3656

    
3657
    s->mb_width= h->sps.mb_width;
3658
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3659

    
3660
    h->b_stride=  s->mb_width*4;
3661
    h->b8_stride= s->mb_width*2;
3662

    
3663
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
3664
    if(h->sps.frame_mbs_only_flag)
3665
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
3666
    else
3667
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
3668

    
3669
    if (s->context_initialized
3670
        && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
3671
        if(h != h0)
3672
            return -1;   // width / height changed during parallelized decoding
3673
        free_tables(h);
3674
        flush_dpb(s->avctx);
3675
        MPV_common_end(s);
3676
    }
3677
    if (!s->context_initialized) {
3678
        if(h != h0)
3679
            return -1;  // we cant (re-)initialize context during parallel decoding
3680
        if (MPV_common_init(s) < 0)
3681
            return -1;
3682
        s->first_field = 0;
3683

    
3684
        init_scan_tables(h);
3685
        alloc_tables(h);
3686

    
3687
        for(i = 1; i < s->avctx->thread_count; i++) {
3688
            H264Context *c;
3689
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
3690
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
3691
            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
3692
            c->sps = h->sps;
3693
            c->pps = h->pps;
3694
            init_scan_tables(c);
3695
            clone_tables(c, h);
3696
        }
3697

    
3698
        for(i = 0; i < s->avctx->thread_count; i++)
3699
            if(context_init(h->thread_context[i]) < 0)
3700
                return -1;
3701

    
3702
        s->avctx->width = s->width;
3703
        s->avctx->height = s->height;
3704
        s->avctx->sample_aspect_ratio= h->sps.sar;
3705
        if(!s->avctx->sample_aspect_ratio.den)
3706
            s->avctx->sample_aspect_ratio.den = 1;
3707

    
3708
        if(h->sps.timing_info_present_flag){
3709
            s->avctx->time_base= (AVRational){h->sps.num_units_in_tick * 2, h->sps.time_scale};
3710
            if(h->x264_build > 0 && h->x264_build < 44)
3711
                s->avctx->time_base.den *= 2;
3712
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
3713
                      s->avctx->time_base.num, s->avctx->time_base.den, 1<<30);
3714
        }
3715
    }
3716

    
3717
    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
3718

    
3719
    h->mb_mbaff = 0;
3720
    h->mb_aff_frame = 0;
3721
    last_pic_structure = s0->picture_structure;
3722
    if(h->sps.frame_mbs_only_flag){
3723
        s->picture_structure= PICT_FRAME;
3724
    }else{
3725
        if(get_bits1(&s->gb)) { //field_pic_flag
3726
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
3727
        } else {
3728
            s->picture_structure= PICT_FRAME;
3729
            h->mb_aff_frame = h->sps.mb_aff;
3730
        }
3731
    }
3732
    h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
3733

    
3734
    if(h0->current_slice == 0){
3735
        while(h->frame_num !=  h->prev_frame_num &&
3736
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
3737
            av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
3738
            frame_start(h);
3739
            h->prev_frame_num++;
3740
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
3741
            s->current_picture_ptr->frame_num= h->prev_frame_num;
3742
            execute_ref_pic_marking(h, NULL, 0);
3743
        }
3744

    
3745
        /* See if we have a decoded first field looking for a pair... */
3746
        if (s0->first_field) {
3747
            assert(s0->current_picture_ptr);
3748
            assert(s0->current_picture_ptr->data[0]);
3749
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
3750

    
3751
            /* figure out if we have a complementary field pair */
3752
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
3753
                /*
3754
                 * Previous field is unmatched. Don't display it, but let it
3755
                 * remain for reference if marked as such.
3756
                 */
3757
                s0->current_picture_ptr = NULL;
3758
                s0->first_field = FIELD_PICTURE;
3759

    
3760
            } else {
3761
                if (h->nal_ref_idc &&
3762
                        s0->current_picture_ptr->reference &&
3763
                        s0->current_picture_ptr->frame_num != h->frame_num) {
3764
                    /*
3765
                     * This and previous field were reference, but had
3766
                     * different frame_nums. Consider this field first in
3767
                     * pair. Throw away previous field except for reference
3768
                     * purposes.
3769
                     */
3770
                    s0->first_field = 1;
3771
                    s0->current_picture_ptr = NULL;
3772

    
3773
                } else {
3774
                    /* Second field in complementary pair */
3775
                    s0->first_field = 0;
3776
                }
3777
            }
3778

    
3779
        } else {
3780
            /* Frame or first field in a potentially complementary pair */
3781
            assert(!s0->current_picture_ptr);
3782
            s0->first_field = FIELD_PICTURE;
3783
        }
3784

    
3785
        if((!FIELD_PICTURE || s0->first_field) && frame_start(h) < 0) {
3786
            s0->first_field = 0;
3787
            return -1;
3788
        }
3789
    }
3790
    if(h != h0)
3791
        clone_slice(h, h0);
3792

    
3793
    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
3794

    
3795
    assert(s->mb_num == s->mb_width * s->mb_height);
3796
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
3797
       first_mb_in_slice                    >= s->mb_num){
3798
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
3799
        return -1;
3800
    }
3801
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
3802
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
3803
    if (s->picture_structure == PICT_BOTTOM_FIELD)
3804
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
3805
    assert(s->mb_y < s->mb_height);
3806

    
3807
    if(s->picture_structure==PICT_FRAME){
3808
        h->curr_pic_num=   h->frame_num;
3809
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
3810
    }else{
3811
        h->curr_pic_num= 2*h->frame_num + 1;
3812
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
3813
    }
3814

    
3815
    if(h->nal_unit_type == NAL_IDR_SLICE){
3816
        get_ue_golomb(&s->gb); /* idr_pic_id */
3817
    }
3818

    
3819
    if(h->sps.poc_type==0){
3820
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3821

    
3822
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
3823
            h->delta_poc_bottom= get_se_golomb(&s->gb);
3824
        }
3825
    }
3826

    
3827
    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
3828
        h->delta_poc[0]= get_se_golomb(&s->gb);
3829

    
3830
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
3831
            h->delta_poc[1]= get_se_golomb(&s->gb);
3832
    }
3833

    
3834
    init_poc(h);
3835

    
3836
    if(h->pps.redundant_pic_cnt_present){
3837
        h->redundant_pic_count= get_ue_golomb(&s->gb);
3838
    }
3839

    
3840
    //set defaults, might be overridden a few lines later
3841
    h->ref_count[0]= h->pps.ref_count[0];
3842
    h->ref_count[1]= h->pps.ref_count[1];
3843

    
3844
    if(h->slice_type_nos != FF_I_TYPE){
3845
        if(h->slice_type_nos == FF_B_TYPE){
3846
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
3847
        }
3848
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
3849

    
3850
        if(num_ref_idx_active_override_flag){
3851
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3852
            if(h->slice_type_nos==FF_B_TYPE)
3853
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
3854

    
3855
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
3856
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3857
                h->ref_count[0]= h->ref_count[1]= 1;
3858
                return -1;
3859
            }
3860
        }
3861
        if(h->slice_type_nos == FF_B_TYPE)
3862
            h->list_count= 2;
3863
        else
3864
            h->list_count= 1;
3865
    }else
3866
        h->list_count= 0;
3867

    
3868
    if(!default_ref_list_done){
3869
        fill_default_ref_list(h);
3870
    }
3871

    
3872
    if(h->slice_type_nos!=FF_I_TYPE && decode_ref_pic_list_reordering(h) < 0)
3873
        return -1;
3874

    
3875
    if(h->slice_type_nos!=FF_I_TYPE){
3876
        s->last_picture_ptr= &h->ref_list[0][0];
3877
        ff_copy_picture(&s->last_picture, s->last_picture_ptr);
3878
    }
3879
    if(h->slice_type_nos==FF_B_TYPE){
3880
        s->next_picture_ptr= &h->ref_list[1][0];
3881
        ff_copy_picture(&s->next_picture, s->next_picture_ptr);
3882
    }
3883

    
3884
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
3885
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
3886
        pred_weight_table(h);
3887
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
3888
        implicit_weight_table(h);
3889
    else
3890
        h->use_weight = 0;
3891

    
3892
    if(h->nal_ref_idc)
3893
        decode_ref_pic_marking(h0, &s->gb);
3894

    
3895
    if(FRAME_MBAFF)
3896
        fill_mbaff_ref_list(h);
3897

    
3898
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
3899
        direct_dist_scale_factor(h);
3900
    direct_ref_list_init(h);
3901

    
3902
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
3903
        tmp = get_ue_golomb(&s->gb);
3904
        if(tmp > 2){
3905
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3906
            return -1;
3907
        }
3908
        h->cabac_init_idc= tmp;
3909
    }
3910

    
3911
    h->last_qscale_diff = 0;
3912
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
3913
    if(tmp>51){
3914
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3915
        return -1;
3916
    }
3917
    s->qscale= tmp;
3918
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3919
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3920
    //FIXME qscale / qp ... stuff
3921
    if(h->slice_type == FF_SP_TYPE){
3922
        get_bits1(&s->gb); /* sp_for_switch_flag */
3923
    }
3924
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
3925
        get_se_golomb(&s->gb); /* slice_qs_delta */
3926
    }
3927

    
3928
    h->deblocking_filter = 1;
3929
    h->slice_alpha_c0_offset = 0;
3930
    h->slice_beta_offset = 0;
3931
    if( h->pps.deblocking_filter_parameters_present ) {
3932
        tmp= get_ue_golomb(&s->gb);
3933
        if(tmp > 2){
3934
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
3935
            return -1;
3936
        }
3937
        h->deblocking_filter= tmp;
3938
        if(h->deblocking_filter < 2)
3939
            h->deblocking_filter^= 1; // 1<->0
3940

    
3941
        if( h->deblocking_filter ) {
3942
            h->slice_alpha_c0_offset = get_se_golomb(&s->gb) << 1;
3943
            h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
3944
        }
3945
    }
3946

    
3947
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
3948
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
3949
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
3950
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
3951
        h->deblocking_filter= 0;
3952

    
3953
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
3954
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
3955
            /* Cheat slightly for speed:
3956
               Do not bother to deblock across slices. */
3957
            h->deblocking_filter = 2;
3958
        } else {
3959
            h0->max_contexts = 1;
3960
            if(!h0->single_decode_warning) {
3961
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
3962
                h0->single_decode_warning = 1;
3963
            }
3964
            if(h != h0)
3965
                return 1; // deblocking switched inside frame
3966
        }
3967
    }
3968

    
3969
#if 0 //FMO
3970
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
3971
        slice_group_change_cycle= get_bits(&s->gb, ?);
3972
#endif
3973

    
3974
    h0->last_slice_type = slice_type;
3975
    h->slice_num = ++h0->current_slice;
3976
    if(h->slice_num >= MAX_SLICES){
3977
        av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
3978
    }
3979

    
3980
    for(j=0; j<2; j++){
3981
        int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
3982
        ref2frm[0]=
3983
        ref2frm[1]= -1;
3984
        for(i=0; i<16; i++)
3985
            ref2frm[i+2]= 4*h->ref_list[j][i].frame_num
3986
                          +(h->ref_list[j][i].reference&3);
3987
        ref2frm[18+0]=
3988
        ref2frm[18+1]= -1;
3989
        for(i=16; i<48; i++)
3990
            ref2frm[i+4]= 4*h->ref_list[j][i].frame_num
3991
                          +(h->ref_list[j][i].reference&3);
3992
    }
3993

    
3994
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
3995
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
3996

    
3997
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
3998
        av_log(h->s.avctx, AV_LOG_DEBUG, "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
3999
               h->slice_num,
4000
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
4001
               first_mb_in_slice,
4002
               av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
4003
               pps_id, h->frame_num,
4004
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
4005
               h->ref_count[0], h->ref_count[1],
4006
               s->qscale,
4007
               h->deblocking_filter, h->slice_alpha_c0_offset/2, h->slice_beta_offset/2,
4008
               h->use_weight,
4009
               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
4010
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
4011
               );
4012
    }
4013

    
4014
    return 0;
4015
}
4016

    
4017
/**
4018
 *
4019
 */
4020
static inline int get_level_prefix(GetBitContext *gb){
4021
    unsigned int buf;
4022
    int log;
4023

    
4024
    OPEN_READER(re, gb);
4025
    UPDATE_CACHE(re, gb);
4026
    buf=GET_CACHE(re, gb);
4027

    
4028
    log= 32 - av_log2(buf);
4029
#ifdef TRACE
4030
    print_bin(buf>>(32-log), log);
4031
    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
4032
#endif
4033

    
4034
    LAST_SKIP_BITS(re, gb, log);
4035
    CLOSE_READER(re, gb);
4036

    
4037
    return log-1;
4038
}
4039

    
4040
static inline int get_dct8x8_allowed(H264Context *h){
4041
    int i;
4042
    for(i=0; i<4; i++){
4043
        if(!IS_SUB_8X8(h->sub_mb_type[i])
4044
           || (!h->sps.direct_8x8_inference_flag && IS_DIRECT(h->sub_mb_type[i])))
4045
            return 0;
4046
    }
4047
    return 1;
4048
}
4049

    
4050
/**
4051
 * decodes a residual block.
4052
 * @param n block index
4053
 * @param scantable scantable
4054
 * @param max_coeff number of coefficients in the block
4055
 * @return <0 if an error occurred
4056
 */
4057
static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
4058
    MpegEncContext * const s = &h->s;
4059
    static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3};
4060
    int level[16];
4061
    int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before;
4062

    
4063
    //FIXME put trailing_onex into the context
4064

    
4065
    if(n == CHROMA_DC_BLOCK_INDEX){
4066
        coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
4067
        total_coeff= coeff_token>>2;
4068
    }else{
4069
        if(n == LUMA_DC_BLOCK_INDEX){
4070
            total_coeff= pred_non_zero_count(h, 0);
4071
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4072
            total_coeff= coeff_token>>2;
4073
        }else{
4074
            total_coeff= pred_non_zero_count(h, n);
4075
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
4076
            total_coeff= coeff_token>>2;
4077
            h->non_zero_count_cache[ scan8[n] ]= total_coeff;
4078
        }
4079
    }
4080

    
4081
    //FIXME set last_non_zero?
4082

    
4083
    if(total_coeff==0)
4084
        return 0;
4085
    if(total_coeff > (unsigned)max_coeff) {
4086
        av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
4087
        return -1;
4088
    }
4089

    
4090
    trailing_ones= coeff_token&3;
4091
    tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
4092
    assert(total_coeff<=16);
4093

    
4094
    i = show_bits(gb, 3);
4095
    skip_bits(gb, trailing_ones);
4096
    level[0] = 1-((i&4)>>1);
4097
    level[1] = 1-((i&2)   );
4098
    level[2] = 1-((i&1)<<1);
4099

    
4100
    if(trailing_ones<total_coeff) {
4101
        int level_code, mask;
4102
        int suffix_length = total_coeff > 10 && trailing_ones < 3;
4103
        int prefix= get_level_prefix(gb);
4104

    
4105
        //first coefficient has suffix_length equal to 0 or 1
4106
        if(prefix<14){ //FIXME try to build a large unified VLC table for all this
4107
            if(suffix_length)
4108
                level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4109
            else
4110
                level_code= (prefix<<suffix_length); //part
4111
        }else if(prefix==14){
4112
            if(suffix_length)
4113
                level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
4114
            else
4115
                level_code= prefix + get_bits(gb, 4); //part
4116
        }else{
4117
            level_code= (15<<suffix_length) + get_bits(gb, prefix-3); //part
4118
            if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense
4119
            if(prefix>=16)
4120
                level_code += (1<<(prefix-3))-4096;
4121
        }
4122

    
4123
        if(trailing_ones < 3) level_code += 2;
4124

    
4125
        suffix_length = 1;
4126
        if(level_code > 5)
4127
            suffix_length++;
4128
        mask= -(level_code&1);
4129
        level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
4130

    
4131
        //remaining coefficients have suffix_length > 0
4132
        for(i=trailing_ones+1;i<total_coeff;i++) {
4133
            static const int suffix_limit[7] = {0,5,11,23,47,95,INT_MAX };
4134
            prefix = get_level_prefix(gb);
4135
            if(prefix<15){
4136
                level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
4137
            }else{
4138
                level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
4139
                if(prefix>=16)
4140
                    level_code += (1<<(prefix-3))-4096;
4141
            }
4142
            mask= -(level_code&1);
4143
            level[i]= (((2+level_code)>>1) ^ mask) - mask;
4144
            if(level_code > suffix_limit[suffix_length])
4145
                suffix_length++;
4146
        }
4147
    }
4148

    
4149
    if(total_coeff == max_coeff)
4150
        zeros_left=0;
4151
    else{
4152
        if(n == CHROMA_DC_BLOCK_INDEX)
4153
            zeros_left= get_vlc2(gb, chroma_dc_total_zeros_vlc[ total_coeff-1 ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
4154
        else
4155
            zeros_left= get_vlc2(gb, total_zeros_vlc[ total_coeff-1 ].table, TOTAL_ZEROS_VLC_BITS, 1);
4156
    }
4157

    
4158
    coeff_num = zeros_left + total_coeff - 1;
4159
    j = scantable[coeff_num];
4160
    if(n > 24){
4161
        block[j] = level[0];
4162
        for(i=1;i<total_coeff;i++) {
4163
            if(zeros_left <= 0)
4164
                run_before = 0;
4165
            else if(zeros_left < 7){
4166
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4167
            }else{
4168
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4169
            }
4170
            zeros_left -= run_before;
4171
            coeff_num -= 1 + run_before;
4172
            j= scantable[ coeff_num ];
4173

    
4174
            block[j]= level[i];
4175
        }
4176
    }else{
4177
        block[j] = (level[0] * qmul[j] + 32)>>6;
4178
        for(i=1;i<total_coeff;i++) {
4179
            if(zeros_left <= 0)
4180
                run_before = 0;
4181
            else if(zeros_left < 7){
4182
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4183
            }else{
4184
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4185
            }
4186
            zeros_left -= run_before;
4187
            coeff_num -= 1 + run_before;
4188
            j= scantable[ coeff_num ];
4189

    
4190
            block[j]= (level[i] * qmul[j] + 32)>>6;
4191
        }
4192
    }
4193

    
4194
    if(zeros_left<0){
4195
        av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
4196
        return -1;
4197
    }
4198

    
4199
    return 0;
4200
}
4201

    
4202
static void predict_field_decoding_flag(H264Context *h){
4203
    MpegEncContext * const s = &h->s;
4204
    const int mb_xy= h->mb_xy;
4205
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
4206
                ? s->current_picture.mb_type[mb_xy-1]
4207
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
4208
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
4209
                : 0;
4210
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
4211
}
4212

    
4213
/**
4214
 * decodes a P_SKIP or B_SKIP macroblock
4215
 */
4216
static void decode_mb_skip(H264Context *h){
4217
    MpegEncContext * const s = &h->s;
4218
    const int mb_xy= h->mb_xy;
4219
    int mb_type=0;
4220

    
4221
    memset(h->non_zero_count[mb_xy], 0, 16);
4222
    memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
4223

    
4224
    if(MB_FIELD)
4225
        mb_type|= MB_TYPE_INTERLACED;
4226

    
4227
    if( h->slice_type_nos == FF_B_TYPE )
4228
    {
4229
        // just for fill_caches. pred_direct_motion will set the real mb_type
4230
        mb_type|= MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
4231

    
4232
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4233
        pred_direct_motion(h, &mb_type);
4234
        mb_type|= MB_TYPE_SKIP;
4235
    }
4236
    else
4237
    {
4238
        int mx, my;
4239
        mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
4240

    
4241
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4242
        pred_pskip_motion(h, &mx, &my);
4243
        fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
4244
        fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
4245
    }
4246

    
4247
    write_back_motion(h, mb_type);
4248
    s->current_picture.mb_type[mb_xy]= mb_type;
4249
    s->current_picture.qscale_table[mb_xy]= s->qscale;
4250
    h->slice_table[ mb_xy ]= h->slice_num;
4251
    h->prev_mb_skipped= 1;
4252
}
4253

    
4254
/**
4255
 * decodes a macroblock
4256
 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
4257
 */
4258
static int decode_mb_cavlc(H264Context *h){
4259
    MpegEncContext * const s = &h->s;
4260
    int mb_xy;
4261
    int partition_count;
4262
    unsigned int mb_type, cbp;
4263
    int dct8x8_allowed= h->pps.transform_8x8_mode;
4264

    
4265
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
4266

    
4267
    s->dsp.clear_blocks(h->mb); //FIXME avoid if already clear (move after skip handlong?
4268

    
4269
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
4270
    cbp = 0; /* avoid warning. FIXME: find a solution without slowing
4271
                down the code */
4272
    if(h->slice_type_nos != FF_I_TYPE){
4273
        if(s->mb_skip_run==-1)
4274
            s->mb_skip_run= get_ue_golomb(&s->gb);
4275

    
4276
        if (s->mb_skip_run--) {
4277
            if(FRAME_MBAFF && (s->mb_y&1) == 0){
4278
                if(s->mb_skip_run==0)
4279
                    h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4280
                else
4281
                    predict_field_decoding_flag(h);
4282
            }
4283
            decode_mb_skip(h);
4284
            return 0;
4285
        }
4286
    }
4287
    if(FRAME_MBAFF){
4288
        if( (s->mb_y&1) == 0 )
4289
            h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4290
    }
4291

    
4292
    h->prev_mb_skipped= 0;
4293

    
4294
    mb_type= get_ue_golomb(&s->gb);
4295
    if(h->slice_type_nos == FF_B_TYPE){
4296
        if(mb_type < 23){
4297
            partition_count= b_mb_type_info[mb_type].partition_count;
4298
            mb_type=         b_mb_type_info[mb_type].type;
4299
        }else{
4300
            mb_type -= 23;
4301
            goto decode_intra_mb;
4302
        }
4303
    }else if(h->slice_type_nos == FF_P_TYPE){
4304
        if(mb_type < 5){
4305
            partition_count= p_mb_type_info[mb_type].partition_count;
4306
            mb_type=         p_mb_type_info[mb_type].type;
4307
        }else{
4308
            mb_type -= 5;
4309
            goto decode_intra_mb;
4310
        }
4311
    }else{
4312
       assert(h->slice_type_nos == FF_I_TYPE);
4313
        if(h->slice_type == FF_SI_TYPE && mb_type)
4314
            mb_type--;
4315
decode_intra_mb:
4316
        if(mb_type > 25){
4317
            av_log(h->s.avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_pict_type_char(h->slice_type), s->mb_x, s->mb_y);
4318
            return -1;
4319
        }
4320
        partition_count=0;
4321
        cbp= i_mb_type_info[mb_type].cbp;
4322
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
4323
        mb_type= i_mb_type_info[mb_type].type;
4324
    }
4325

    
4326
    if(MB_FIELD)
4327
        mb_type |= MB_TYPE_INTERLACED;
4328

    
4329
    h->slice_table[ mb_xy ]= h->slice_num;
4330

    
4331
    if(IS_INTRA_PCM(mb_type)){
4332
        unsigned int x;
4333

    
4334
        // We assume these blocks are very rare so we do not optimize it.
4335
        align_get_bits(&s->gb);
4336

    
4337
        // The pixels are stored in the same order as levels in h->mb array.
4338
        for(x=0; x < (CHROMA ? 384 : 256); x++){
4339
            ((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
4340
        }
4341

    
4342
        // In deblocking, the quantizer is 0
4343
        s->current_picture.qscale_table[mb_xy]= 0;
4344
        // All coeffs are present
4345
        memset(h->non_zero_count[mb_xy], 16, 16);
4346

    
4347
        s->current_picture.mb_type[mb_xy]= mb_type;
4348
        return 0;
4349
    }
4350

    
4351
    if(MB_MBAFF){
4352
        h->ref_count[0] <<= 1;
4353
        h->ref_count[1] <<= 1;
4354
    }
4355

    
4356
    fill_caches(h, mb_type, 0);
4357

    
4358
    //mb_pred
4359
    if(IS_INTRA(mb_type)){
4360
        int pred_mode;
4361
//            init_top_left_availability(h);
4362
        if(IS_INTRA4x4(mb_type)){
4363
            int i;
4364
            int di = 1;
4365
            if(dct8x8_allowed && get_bits1(&s->gb)){
4366
                mb_type |= MB_TYPE_8x8DCT;
4367
                di = 4;
4368
            }
4369

    
4370
//                fill_intra4x4_pred_table(h);
4371
            for(i=0; i<16; i+=di){
4372
                int mode= pred_intra_mode(h, i);
4373

    
4374
                if(!get_bits1(&s->gb)){
4375
                    const int rem_mode= get_bits(&s->gb, 3);
4376
                    mode = rem_mode + (rem_mode >= mode);
4377
                }
4378

    
4379
                if(di==4)
4380
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
4381
                else
4382
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
4383
            }
4384
            write_back_intra_pred_mode(h);
4385
            if( check_intra4x4_pred_mode(h) < 0)
4386
                return -1;
4387
        }else{
4388
            h->intra16x16_pred_mode= check_intra_pred_mode(h, h->intra16x16_pred_mode);
4389
            if(h->intra16x16_pred_mode < 0)
4390
                return -1;
4391
        }
4392
        if(CHROMA){
4393
            pred_mode= check_intra_pred_mode(h, get_ue_golomb(&s->gb));
4394
            if(pred_mode < 0)
4395
                return -1;
4396
            h->chroma_pred_mode= pred_mode;
4397
        }
4398
    }else if(partition_count==4){
4399
        int i, j, sub_partition_count[4], list, ref[2][4];
4400

    
4401
        if(h->slice_type_nos == FF_B_TYPE){
4402
            for(i=0; i<4; i++){
4403
                h->sub_mb_type[i]= get_ue_golomb(&s->gb);
4404
                if(h->sub_mb_type[i] >=13){
4405
                    av_log(h->s.avctx, AV_LOG_ERROR, "B sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y);
4406
                    return -1;
4407
                }
4408
                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
4409
                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
4410
            }
4411
            if(   IS_DIRECT(h->sub_mb_type[0]) || IS_DIRECT(h->sub_mb_type[1])
4412
               || IS_DIRECT(h->sub_mb_type[2]) || IS_DIRECT(h->sub_mb_type[3])) {
4413
                pred_direct_motion(h, &mb_type);
4414
                h->ref_cache[0][scan8[4]] =
4415
                h->ref_cache[1][scan8[4]] =
4416
                h->ref_cache[0][scan8[12]] =
4417
                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
4418
            }
4419
        }else{
4420
            assert(h->slice_type_nos == FF_P_TYPE); //FIXME SP correct ?
4421
            for(i=0; i<4; i++){
4422
                h->sub_mb_type[i]= get_ue_golomb(&s->gb);
4423
                if(h->sub_mb_type[i] >=4){
4424
                    av_log(h->s.avctx, AV_LOG_ERROR, "P sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y);
4425
                    return -1;
4426
                }
4427
                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
4428
                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
4429
            }
4430
        }
4431

    
4432
        for(list=0; list<h->list_count; list++){
4433
            int ref_count= IS_REF0(mb_type) ? 1 : h->ref_count[list];
4434
            for(i=0; i<4; i++){
4435
                if(IS_DIRECT(h->sub_mb_type[i])) continue;
4436
                if(IS_DIR(h->sub_mb_type[i], 0, list)){
4437
                    unsigned int tmp = get_te0_golomb(&s->gb, ref_count); //FIXME init to 0 before and skip?
4438
                    if(tmp>=ref_count){
4439
                        av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
4440
                        return -1;
4441
                    }
4442
                    ref[list][i]= tmp;
4443
                }else{
4444
                 //FIXME
4445
                    ref[list][i] = -1;
4446
                }
4447
            }
4448
        }
4449

    
4450
        if(dct8x8_allowed)
4451
            dct8x8_allowed = get_dct8x8_allowed(h);
4452

    
4453
        for(list=0; list<h->list_count; list++){
4454
            for(i=0; i<4; i++){
4455
                if(IS_DIRECT(h->sub_mb_type[i])) {
4456
                    h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ];
4457
                    continue;
4458
                }
4459
                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ]=
4460
                h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
4461

    
4462
                if(IS_DIR(h->sub_mb_type[i], 0, list)){
4463
                    const int sub_mb_type= h->sub_mb_type[i];
4464
                    const