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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
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

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

    
28
#include "libavcore/imgutils.h"
29
#include "internal.h"
30
#include "dsputil.h"
31
#include "avcodec.h"
32
#include "mpegvideo.h"
33
#include "h264.h"
34
#include "h264data.h"
35
#include "h264_mvpred.h"
36
#include "h264_parser.h"
37
#include "golomb.h"
38
#include "mathops.h"
39
#include "rectangle.h"
40
#include "vdpau_internal.h"
41
#include "libavutil/avassert.h"
42

    
43
#include "cabac.h"
44

    
45
//#undef NDEBUG
46
#include <assert.h>
47

    
48
static const uint8_t rem6[52]={
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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,
50
};
51

    
52
static const uint8_t div6[52]={
53
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,
54
};
55

    
56
static const enum PixelFormat hwaccel_pixfmt_list_h264_jpeg_420[] = {
57
    PIX_FMT_DXVA2_VLD,
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    PIX_FMT_VAAPI_VLD,
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    PIX_FMT_YUVJ420P,
60
    PIX_FMT_NONE
61
};
62

    
63
void ff_h264_write_back_intra_pred_mode(H264Context *h){
64
    int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
65

    
66
    AV_COPY32(mode, h->intra4x4_pred_mode_cache + 4 + 8*4);
67
    mode[4]= h->intra4x4_pred_mode_cache[7+8*3];
68
    mode[5]= h->intra4x4_pred_mode_cache[7+8*2];
69
    mode[6]= h->intra4x4_pred_mode_cache[7+8*1];
70
}
71

    
72
/**
73
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
74
 */
75
int ff_h264_check_intra4x4_pred_mode(H264Context *h){
76
    MpegEncContext * const s = &h->s;
77
    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
78
    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
79
    int i;
80

    
81
    if(!(h->top_samples_available&0x8000)){
82
        for(i=0; i<4; i++){
83
            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
84
            if(status<0){
85
                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);
86
                return -1;
87
            } else if(status){
88
                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
89
            }
90
        }
91
    }
92

    
93
    if((h->left_samples_available&0x8888)!=0x8888){
94
        static const int mask[4]={0x8000,0x2000,0x80,0x20};
95
        for(i=0; i<4; i++){
96
            if(!(h->left_samples_available&mask[i])){
97
                int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
98
                if(status<0){
99
                    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);
100
                    return -1;
101
                } else if(status){
102
                    h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
103
                }
104
            }
105
        }
106
    }
107

    
108
    return 0;
109
} //FIXME cleanup like ff_h264_check_intra_pred_mode
110

    
111
/**
112
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
113
 */
114
int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
115
    MpegEncContext * const s = &h->s;
116
    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
117
    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
118

    
119
    if(mode > 6U) {
120
        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);
121
        return -1;
122
    }
123

    
124
    if(!(h->top_samples_available&0x8000)){
125
        mode= top[ mode ];
126
        if(mode<0){
127
            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);
128
            return -1;
129
        }
130
    }
131

    
132
    if((h->left_samples_available&0x8080) != 0x8080){
133
        mode= left[ mode ];
134
        if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
135
            mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
136
        }
137
        if(mode<0){
138
            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);
139
            return -1;
140
        }
141
    }
142

    
143
    return mode;
144
}
145

    
146
const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
147
    int i, si, di;
148
    uint8_t *dst;
149
    int bufidx;
150

    
151
//    src[0]&0x80;                //forbidden bit
152
    h->nal_ref_idc= src[0]>>5;
153
    h->nal_unit_type= src[0]&0x1F;
154

    
155
    src++; length--;
156
#if 0
157
    for(i=0; i<length; i++)
158
        printf("%2X ", src[i]);
159
#endif
160

    
161
#if HAVE_FAST_UNALIGNED
162
# if HAVE_FAST_64BIT
163
#   define RS 7
164
    for(i=0; i+1<length; i+=9){
165
        if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
166
# else
167
#   define RS 3
168
    for(i=0; i+1<length; i+=5){
169
        if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
170
# endif
171
            continue;
172
        if(i>0 && !src[i]) i--;
173
        while(src[i]) i++;
174
#else
175
#   define RS 0
176
    for(i=0; i+1<length; i+=2){
177
        if(src[i]) continue;
178
        if(i>0 && src[i-1]==0) i--;
179
#endif
180
        if(i+2<length && src[i+1]==0 && src[i+2]<=3){
181
            if(src[i+2]!=3){
182
                /* startcode, so we must be past the end */
183
                length=i;
184
            }
185
            break;
186
        }
187
        i-= RS;
188
    }
189

    
190
    if(i>=length-1){ //no escaped 0
191
        *dst_length= length;
192
        *consumed= length+1; //+1 for the header
193
        return src;
194
    }
195

    
196
    bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
197
    av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
198
    dst= h->rbsp_buffer[bufidx];
199

    
200
    if (dst == NULL){
201
        return NULL;
202
    }
203

    
204
//printf("decoding esc\n");
205
    memcpy(dst, src, i);
206
    si=di=i;
207
    while(si+2<length){
208
        //remove escapes (very rare 1:2^22)
209
        if(src[si+2]>3){
210
            dst[di++]= src[si++];
211
            dst[di++]= src[si++];
212
        }else if(src[si]==0 && src[si+1]==0){
213
            if(src[si+2]==3){ //escape
214
                dst[di++]= 0;
215
                dst[di++]= 0;
216
                si+=3;
217
                continue;
218
            }else //next start code
219
                goto nsc;
220
        }
221

    
222
        dst[di++]= src[si++];
223
    }
224
    while(si<length)
225
        dst[di++]= src[si++];
226
nsc:
227

    
228
    memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
229

    
230
    *dst_length= di;
231
    *consumed= si + 1;//+1 for the header
232
//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
233
    return dst;
234
}
235

    
236
int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
237
    int v= *src;
238
    int r;
239

    
240
    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
241

    
242
    for(r=1; r<9; r++){
243
        if(v&1) return r;
244
        v>>=1;
245
    }
246
    return 0;
247
}
248

    
249
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
250
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
251
                           int src_x_offset, int src_y_offset,
252
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
253
    MpegEncContext * const s = &h->s;
254
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
255
    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
256
    const int luma_xy= (mx&3) + ((my&3)<<2);
257
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
258
    uint8_t * src_cb, * src_cr;
259
    int extra_width= h->emu_edge_width;
260
    int extra_height= h->emu_edge_height;
261
    int emu=0;
262
    const int full_mx= mx>>2;
263
    const int full_my= my>>2;
264
    const int pic_width  = 16*s->mb_width;
265
    const int pic_height = 16*s->mb_height >> MB_FIELD;
266

    
267
    if(mx&7) extra_width -= 3;
268
    if(my&7) extra_height -= 3;
269

    
270
    if(   full_mx < 0-extra_width
271
       || full_my < 0-extra_height
272
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
273
       || full_my + 16/*FIXME*/ > pic_height + extra_height){
274
        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);
275
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
276
        emu=1;
277
    }
278

    
279
    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
280
    if(!square){
281
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
282
    }
283

    
284
    if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
285

    
286
    if(MB_FIELD){
287
        // chroma offset when predicting from a field of opposite parity
288
        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
289
        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
290
    }
291
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
292
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
293

    
294
    if(emu){
295
        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);
296
            src_cb= s->edge_emu_buffer;
297
    }
298
    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
299

    
300
    if(emu){
301
        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);
302
            src_cr= s->edge_emu_buffer;
303
    }
304
    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
305
}
306

    
307
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
308
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
309
                           int x_offset, int y_offset,
310
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
311
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
312
                           int list0, int list1){
313
    MpegEncContext * const s = &h->s;
314
    qpel_mc_func *qpix_op=  qpix_put;
315
    h264_chroma_mc_func chroma_op= chroma_put;
316

    
317
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
318
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
319
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
320
    x_offset += 8*s->mb_x;
321
    y_offset += 8*(s->mb_y >> MB_FIELD);
322

    
323
    if(list0){
324
        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
325
        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
326
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
327
                           qpix_op, chroma_op);
328

    
329
        qpix_op=  qpix_avg;
330
        chroma_op= chroma_avg;
331
    }
332

    
333
    if(list1){
334
        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
335
        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
336
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
337
                           qpix_op, chroma_op);
338
    }
339
}
340

    
341
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
342
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
343
                           int x_offset, int y_offset,
344
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
345
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
346
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
347
                           int list0, int list1){
348
    MpegEncContext * const s = &h->s;
349

    
350
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
351
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
352
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
353
    x_offset += 8*s->mb_x;
354
    y_offset += 8*(s->mb_y >> MB_FIELD);
355

    
356
    if(list0 && list1){
357
        /* don't optimize for luma-only case, since B-frames usually
358
         * use implicit weights => chroma too. */
359
        uint8_t *tmp_cb = s->obmc_scratchpad;
360
        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
361
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
362
        int refn0 = h->ref_cache[0][ scan8[n] ];
363
        int refn1 = h->ref_cache[1][ scan8[n] ];
364

    
365
        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
366
                    dest_y, dest_cb, dest_cr,
367
                    x_offset, y_offset, qpix_put, chroma_put);
368
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
369
                    tmp_y, tmp_cb, tmp_cr,
370
                    x_offset, y_offset, qpix_put, chroma_put);
371

    
372
        if(h->use_weight == 2){
373
            int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
374
            int weight1 = 64 - weight0;
375
            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
376
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
377
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
378
        }else{
379
            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
380
                            h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
381
                            h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
382
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
383
                            h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
384
                            h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
385
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
386
                            h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
387
                            h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
388
        }
389
    }else{
390
        int list = list1 ? 1 : 0;
391
        int refn = h->ref_cache[list][ scan8[n] ];
392
        Picture *ref= &h->ref_list[list][refn];
393
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
394
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
395
                    qpix_put, chroma_put);
396

    
397
        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
398
                       h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
399
        if(h->use_weight_chroma){
400
            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
401
                             h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
402
            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
403
                             h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
404
        }
405
    }
406
}
407

    
408
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
409
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
410
                           int x_offset, int y_offset,
411
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
412
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
413
                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
414
                           int list0, int list1){
415
    if((h->use_weight==2 && list0 && list1
416
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
417
       || h->use_weight==1)
418
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
419
                         x_offset, y_offset, qpix_put, chroma_put,
420
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
421
    else
422
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
423
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
424
}
425

    
426
static inline void prefetch_motion(H264Context *h, int list){
427
    /* fetch pixels for estimated mv 4 macroblocks ahead
428
     * optimized for 64byte cache lines */
429
    MpegEncContext * const s = &h->s;
430
    const int refn = h->ref_cache[list][scan8[0]];
431
    if(refn >= 0){
432
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
433
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
434
        uint8_t **src= h->ref_list[list][refn].data;
435
        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
436
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
437
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
438
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
439
    }
440
}
441

    
442
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
443
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
444
                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
445
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
446
    MpegEncContext * const s = &h->s;
447
    const int mb_xy= h->mb_xy;
448
    const int mb_type= s->current_picture.mb_type[mb_xy];
449

    
450
    assert(IS_INTER(mb_type));
451

    
452
    prefetch_motion(h, 0);
453

    
454
    if(IS_16X16(mb_type)){
455
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
456
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
457
                weight_op, weight_avg,
458
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
459
    }else if(IS_16X8(mb_type)){
460
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
461
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
462
                &weight_op[1], &weight_avg[1],
463
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
464
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
465
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
466
                &weight_op[1], &weight_avg[1],
467
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
468
    }else if(IS_8X16(mb_type)){
469
        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
470
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
471
                &weight_op[2], &weight_avg[2],
472
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
473
        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
474
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
475
                &weight_op[2], &weight_avg[2],
476
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
477
    }else{
478
        int i;
479

    
480
        assert(IS_8X8(mb_type));
481

    
482
        for(i=0; i<4; i++){
483
            const int sub_mb_type= h->sub_mb_type[i];
484
            const int n= 4*i;
485
            int x_offset= (i&1)<<2;
486
            int y_offset= (i&2)<<1;
487

    
488
            if(IS_SUB_8X8(sub_mb_type)){
489
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
490
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
491
                    &weight_op[3], &weight_avg[3],
492
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
493
            }else if(IS_SUB_8X4(sub_mb_type)){
494
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
495
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
496
                    &weight_op[4], &weight_avg[4],
497
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
498
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
499
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
500
                    &weight_op[4], &weight_avg[4],
501
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
502
            }else if(IS_SUB_4X8(sub_mb_type)){
503
                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
504
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
505
                    &weight_op[5], &weight_avg[5],
506
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
507
                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
508
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
509
                    &weight_op[5], &weight_avg[5],
510
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
511
            }else{
512
                int j;
513
                assert(IS_SUB_4X4(sub_mb_type));
514
                for(j=0; j<4; j++){
515
                    int sub_x_offset= x_offset + 2*(j&1);
516
                    int sub_y_offset= y_offset +   (j&2);
517
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
518
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
519
                        &weight_op[6], &weight_avg[6],
520
                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
521
                }
522
            }
523
        }
524
    }
525

    
526
    prefetch_motion(h, 1);
527
}
528

    
529

    
530
static void free_tables(H264Context *h){
531
    int i;
532
    H264Context *hx;
533
    av_freep(&h->intra4x4_pred_mode);
534
    av_freep(&h->chroma_pred_mode_table);
535
    av_freep(&h->cbp_table);
536
    av_freep(&h->mvd_table[0]);
537
    av_freep(&h->mvd_table[1]);
538
    av_freep(&h->direct_table);
539
    av_freep(&h->non_zero_count);
540
    av_freep(&h->slice_table_base);
541
    h->slice_table= NULL;
542
    av_freep(&h->list_counts);
543

    
544
    av_freep(&h->mb2b_xy);
545
    av_freep(&h->mb2br_xy);
546

    
547
    for(i = 0; i < MAX_THREADS; i++) {
548
        hx = h->thread_context[i];
549
        if(!hx) continue;
550
        av_freep(&hx->top_borders[1]);
551
        av_freep(&hx->top_borders[0]);
552
        av_freep(&hx->s.obmc_scratchpad);
553
        av_freep(&hx->rbsp_buffer[1]);
554
        av_freep(&hx->rbsp_buffer[0]);
555
        hx->rbsp_buffer_size[0] = 0;
556
        hx->rbsp_buffer_size[1] = 0;
557
        if (i) av_freep(&h->thread_context[i]);
558
    }
559
}
560

    
561
static void init_dequant8_coeff_table(H264Context *h){
562
    int i,q,x;
563
    h->dequant8_coeff[0] = h->dequant8_buffer[0];
564
    h->dequant8_coeff[1] = h->dequant8_buffer[1];
565

    
566
    for(i=0; i<2; i++ ){
567
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
568
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
569
            break;
570
        }
571

    
572
        for(q=0; q<52; q++){
573
            int shift = div6[q];
574
            int idx = rem6[q];
575
            for(x=0; x<64; x++)
576
                h->dequant8_coeff[i][q][(x>>3)|((x&7)<<3)] =
577
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
578
                    h->pps.scaling_matrix8[i][x]) << shift;
579
        }
580
    }
581
}
582

    
583
static void init_dequant4_coeff_table(H264Context *h){
584
    int i,j,q,x;
585
    for(i=0; i<6; i++ ){
586
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
587
        for(j=0; j<i; j++){
588
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
589
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
590
                break;
591
            }
592
        }
593
        if(j<i)
594
            continue;
595

    
596
        for(q=0; q<52; q++){
597
            int shift = div6[q] + 2;
598
            int idx = rem6[q];
599
            for(x=0; x<16; x++)
600
                h->dequant4_coeff[i][q][(x>>2)|((x<<2)&0xF)] =
601
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
602
                    h->pps.scaling_matrix4[i][x]) << shift;
603
        }
604
    }
605
}
606

    
607
static void init_dequant_tables(H264Context *h){
608
    int i,x;
609
    init_dequant4_coeff_table(h);
610
    if(h->pps.transform_8x8_mode)
611
        init_dequant8_coeff_table(h);
612
    if(h->sps.transform_bypass){
613
        for(i=0; i<6; i++)
614
            for(x=0; x<16; x++)
615
                h->dequant4_coeff[i][0][x] = 1<<6;
616
        if(h->pps.transform_8x8_mode)
617
            for(i=0; i<2; i++)
618
                for(x=0; x<64; x++)
619
                    h->dequant8_coeff[i][0][x] = 1<<6;
620
    }
621
}
622

    
623

    
624
int ff_h264_alloc_tables(H264Context *h){
625
    MpegEncContext * const s = &h->s;
626
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
627
    const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
628
    int x,y;
629

    
630
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
631

    
632
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 32 * sizeof(uint8_t), fail)
633
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
634
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
635

    
636
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
637
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
638
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
639
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
640
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
641

    
642
    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
643
    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
644

    
645
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
646
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
647
    for(y=0; y<s->mb_height; y++){
648
        for(x=0; x<s->mb_width; x++){
649
            const int mb_xy= x + y*s->mb_stride;
650
            const int b_xy = 4*x + 4*y*h->b_stride;
651

    
652
            h->mb2b_xy [mb_xy]= b_xy;
653
            h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
654
        }
655
    }
656

    
657
    s->obmc_scratchpad = NULL;
658

    
659
    if(!h->dequant4_coeff[0])
660
        init_dequant_tables(h);
661

    
662
    return 0;
663
fail:
664
    free_tables(h);
665
    return -1;
666
}
667

    
668
/**
669
 * Mimic alloc_tables(), but for every context thread.
670
 */
671
static void clone_tables(H264Context *dst, H264Context *src, int i){
672
    MpegEncContext * const s = &src->s;
673
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
674
    dst->non_zero_count           = src->non_zero_count;
675
    dst->slice_table              = src->slice_table;
676
    dst->cbp_table                = src->cbp_table;
677
    dst->mb2b_xy                  = src->mb2b_xy;
678
    dst->mb2br_xy                 = src->mb2br_xy;
679
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
680
    dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
681
    dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
682
    dst->direct_table             = src->direct_table;
683
    dst->list_counts              = src->list_counts;
684

    
685
    dst->s.obmc_scratchpad = NULL;
686
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
687
}
688

    
689
/**
690
 * Init context
691
 * Allocate buffers which are not shared amongst multiple threads.
692
 */
693
static int context_init(H264Context *h){
694
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
695
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
696

    
697
    h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
698
    h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
699

    
700
    return 0;
701
fail:
702
    return -1; // free_tables will clean up for us
703
}
704

    
705
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
706

    
707
static av_cold void common_init(H264Context *h){
708
    MpegEncContext * const s = &h->s;
709

    
710
    s->width = s->avctx->width;
711
    s->height = s->avctx->height;
712
    s->codec_id= s->avctx->codec->id;
713

    
714
    ff_h264dsp_init(&h->h264dsp);
715
    ff_h264_pred_init(&h->hpc, s->codec_id);
716

    
717
    h->dequant_coeff_pps= -1;
718
    s->unrestricted_mv=1;
719
    s->decode=1; //FIXME
720

    
721
    dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
722

    
723
    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
724
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
725
}
726

    
727
int ff_h264_decode_extradata(H264Context *h)
728
{
729
    AVCodecContext *avctx = h->s.avctx;
730

    
731
    if(*(char *)avctx->extradata == 1){
732
        int i, cnt, nalsize;
733
        unsigned char *p = avctx->extradata;
734

    
735
        h->is_avc = 1;
736

    
737
        if(avctx->extradata_size < 7) {
738
            av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
739
            return -1;
740
        }
741
        /* sps and pps in the avcC always have length coded with 2 bytes,
742
           so put a fake nal_length_size = 2 while parsing them */
743
        h->nal_length_size = 2;
744
        // Decode sps from avcC
745
        cnt = *(p+5) & 0x1f; // Number of sps
746
        p += 6;
747
        for (i = 0; i < cnt; i++) {
748
            nalsize = AV_RB16(p) + 2;
749
            if(decode_nal_units(h, p, nalsize) < 0) {
750
                av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
751
                return -1;
752
            }
753
            p += nalsize;
754
        }
755
        // Decode pps from avcC
756
        cnt = *(p++); // Number of pps
757
        for (i = 0; i < cnt; i++) {
758
            nalsize = AV_RB16(p) + 2;
759
            if(decode_nal_units(h, p, nalsize)  != nalsize) {
760
                av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
761
                return -1;
762
            }
763
            p += nalsize;
764
        }
765
        // Now store right nal length size, that will be use to parse all other nals
766
        h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
767
    } else {
768
        h->is_avc = 0;
769
        if(decode_nal_units(h, avctx->extradata, avctx->extradata_size) < 0)
770
            return -1;
771
    }
772
    return 0;
773
}
774

    
775
av_cold int ff_h264_decode_init(AVCodecContext *avctx){
776
    H264Context *h= avctx->priv_data;
777
    MpegEncContext * const s = &h->s;
778

    
779
    MPV_decode_defaults(s);
780

    
781
    s->avctx = avctx;
782
    common_init(h);
783

    
784
    s->out_format = FMT_H264;
785
    s->workaround_bugs= avctx->workaround_bugs;
786

    
787
    // set defaults
788
//    s->decode_mb= ff_h263_decode_mb;
789
    s->quarter_sample = 1;
790
    if(!avctx->has_b_frames)
791
    s->low_delay= 1;
792

    
793
    avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
794

    
795
    ff_h264_decode_init_vlc();
796

    
797
    h->thread_context[0] = h;
798
    h->outputed_poc = INT_MIN;
799
    h->prev_poc_msb= 1<<16;
800
    h->x264_build = -1;
801
    ff_h264_reset_sei(h);
802
    if(avctx->codec_id == CODEC_ID_H264){
803
        if(avctx->ticks_per_frame == 1){
804
            s->avctx->time_base.den *=2;
805
        }
806
        avctx->ticks_per_frame = 2;
807
    }
808

    
809
    if(avctx->extradata_size > 0 && avctx->extradata &&
810
        ff_h264_decode_extradata(h))
811
        return -1;
812

    
813
    if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
814
        s->avctx->has_b_frames = h->sps.num_reorder_frames;
815
        s->low_delay = 0;
816
    }
817

    
818
    return 0;
819
}
820

    
821
int ff_h264_frame_start(H264Context *h){
822
    MpegEncContext * const s = &h->s;
823
    int i;
824

    
825
    if(MPV_frame_start(s, s->avctx) < 0)
826
        return -1;
827
    ff_er_frame_start(s);
828
    /*
829
     * MPV_frame_start uses pict_type to derive key_frame.
830
     * This is incorrect for H.264; IDR markings must be used.
831
     * Zero here; IDR markings per slice in frame or fields are ORed in later.
832
     * See decode_nal_units().
833
     */
834
    s->current_picture_ptr->key_frame= 0;
835
    s->current_picture_ptr->mmco_reset= 0;
836

    
837
    assert(s->linesize && s->uvlinesize);
838

    
839
    for(i=0; i<16; i++){
840
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
841
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
842
    }
843
    for(i=0; i<4; i++){
844
        h->block_offset[16+i]=
845
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
846
        h->block_offset[24+16+i]=
847
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
848
    }
849

    
850
    /* can't be in alloc_tables because linesize isn't known there.
851
     * FIXME: redo bipred weight to not require extra buffer? */
852
    for(i = 0; i < s->avctx->thread_count; i++)
853
        if(h->thread_context[i] && !h->thread_context[i]->s.obmc_scratchpad)
854
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
855

    
856
    /* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
857
    memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
858

    
859
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
860

    
861
    // We mark the current picture as non-reference after allocating it, so
862
    // that if we break out due to an error it can be released automatically
863
    // in the next MPV_frame_start().
864
    // SVQ3 as well as most other codecs have only last/next/current and thus
865
    // get released even with set reference, besides SVQ3 and others do not
866
    // mark frames as reference later "naturally".
867
    if(s->codec_id != CODEC_ID_SVQ3)
868
        s->current_picture_ptr->reference= 0;
869

    
870
    s->current_picture_ptr->field_poc[0]=
871
    s->current_picture_ptr->field_poc[1]= INT_MAX;
872
    assert(s->current_picture_ptr->long_ref==0);
873

    
874
    return 0;
875
}
876

    
877
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){
878
    MpegEncContext * const s = &h->s;
879
    uint8_t *top_border;
880
    int top_idx = 1;
881

    
882
    src_y  -=   linesize;
883
    src_cb -= uvlinesize;
884
    src_cr -= uvlinesize;
885

    
886
    if(!simple && FRAME_MBAFF){
887
        if(s->mb_y&1){
888
            if(!MB_MBAFF){
889
                top_border = h->top_borders[0][s->mb_x];
890
                AV_COPY128(top_border, src_y + 15*linesize);
891
                if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
892
                    AV_COPY64(top_border+16, src_cb+7*uvlinesize);
893
                    AV_COPY64(top_border+24, src_cr+7*uvlinesize);
894
                }
895
            }
896
        }else if(MB_MBAFF){
897
            top_idx = 0;
898
        }else
899
            return;
900
    }
901

    
902
    top_border = h->top_borders[top_idx][s->mb_x];
903
    // There are two lines saved, the line above the the top macroblock of a pair,
904
    // and the line above the bottom macroblock
905
    AV_COPY128(top_border, src_y + 16*linesize);
906

    
907
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
908
        AV_COPY64(top_border+16, src_cb+8*uvlinesize);
909
        AV_COPY64(top_border+24, src_cr+8*uvlinesize);
910
    }
911
}
912

    
913
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){
914
    MpegEncContext * const s = &h->s;
915
    int deblock_left;
916
    int deblock_top;
917
    int top_idx = 1;
918
    uint8_t *top_border_m1;
919
    uint8_t *top_border;
920

    
921
    if(!simple && FRAME_MBAFF){
922
        if(s->mb_y&1){
923
            if(!MB_MBAFF)
924
                return;
925
        }else{
926
            top_idx = MB_MBAFF ? 0 : 1;
927
        }
928
    }
929

    
930
    if(h->deblocking_filter == 2) {
931
        deblock_left = h->left_type[0];
932
        deblock_top  = h->top_type;
933
    } else {
934
        deblock_left = (s->mb_x > 0);
935
        deblock_top =  (s->mb_y > !!MB_FIELD);
936
    }
937

    
938
    src_y  -=   linesize + 1;
939
    src_cb -= uvlinesize + 1;
940
    src_cr -= uvlinesize + 1;
941

    
942
    top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
943
    top_border    = h->top_borders[top_idx][s->mb_x];
944

    
945
#define XCHG(a,b,xchg)\
946
if (xchg) AV_SWAP64(b,a);\
947
else      AV_COPY64(b,a);
948

    
949
    if(deblock_top){
950
        if(deblock_left){
951
            XCHG(top_border_m1+8, src_y -7, 1);
952
        }
953
        XCHG(top_border+0, src_y +1, xchg);
954
        XCHG(top_border+8, src_y +9, 1);
955
        if(s->mb_x+1 < s->mb_width){
956
            XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
957
        }
958
    }
959

    
960
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
961
        if(deblock_top){
962
            if(deblock_left){
963
                XCHG(top_border_m1+16, src_cb -7, 1);
964
                XCHG(top_border_m1+24, src_cr -7, 1);
965
            }
966
            XCHG(top_border+16, src_cb+1, 1);
967
            XCHG(top_border+24, src_cr+1, 1);
968
        }
969
    }
970
}
971

    
972
static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
973
    MpegEncContext * const s = &h->s;
974
    const int mb_x= s->mb_x;
975
    const int mb_y= s->mb_y;
976
    const int mb_xy= h->mb_xy;
977
    const int mb_type= s->current_picture.mb_type[mb_xy];
978
    uint8_t  *dest_y, *dest_cb, *dest_cr;
979
    int linesize, uvlinesize /*dct_offset*/;
980
    int i;
981
    int *block_offset = &h->block_offset[0];
982
    const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
983
    /* is_h264 should always be true if SVQ3 is disabled. */
984
    const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
985
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
986
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
987

    
988
    dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
989
    dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
990
    dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
991

    
992
    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
993
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
994

    
995
    h->list_counts[mb_xy]= h->list_count;
996

    
997
    if (!simple && MB_FIELD) {
998
        linesize   = h->mb_linesize   = s->linesize * 2;
999
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1000
        block_offset = &h->block_offset[24];
1001
        if(mb_y&1){ //FIXME move out of this function?
1002
            dest_y -= s->linesize*15;
1003
            dest_cb-= s->uvlinesize*7;
1004
            dest_cr-= s->uvlinesize*7;
1005
        }
1006
        if(FRAME_MBAFF) {
1007
            int list;
1008
            for(list=0; list<h->list_count; list++){
1009
                if(!USES_LIST(mb_type, list))
1010
                    continue;
1011
                if(IS_16X16(mb_type)){
1012
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
1013
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1014
                }else{
1015
                    for(i=0; i<16; i+=4){
1016
                        int ref = h->ref_cache[list][scan8[i]];
1017
                        if(ref >= 0)
1018
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1019
                    }
1020
                }
1021
            }
1022
        }
1023
    } else {
1024
        linesize   = h->mb_linesize   = s->linesize;
1025
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1026
//        dct_offset = s->linesize * 16;
1027
    }
1028

    
1029
    if (!simple && IS_INTRA_PCM(mb_type)) {
1030
        for (i=0; i<16; i++) {
1031
            memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1032
        }
1033
        for (i=0; i<8; i++) {
1034
            memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1035
            memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1036
        }
1037
    } else {
1038
        if(IS_INTRA(mb_type)){
1039
            if(h->deblocking_filter)
1040
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1041

    
1042
            if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1043
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1044
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1045
            }
1046

    
1047
            if(IS_INTRA4x4(mb_type)){
1048
                if(simple || !s->encoding){
1049
                    if(IS_8x8DCT(mb_type)){
1050
                        if(transform_bypass){
1051
                            idct_dc_add =
1052
                            idct_add    = s->dsp.add_pixels8;
1053
                        }else{
1054
                            idct_dc_add = h->h264dsp.h264_idct8_dc_add;
1055
                            idct_add    = h->h264dsp.h264_idct8_add;
1056
                        }
1057
                        for(i=0; i<16; i+=4){
1058
                            uint8_t * const ptr= dest_y + block_offset[i];
1059
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1060
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1061
                                h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1062
                            }else{
1063
                                const int nnz = h->non_zero_count_cache[ scan8[i] ];
1064
                                h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1065
                                                            (h->topright_samples_available<<i)&0x4000, linesize);
1066
                                if(nnz){
1067
                                    if(nnz == 1 && h->mb[i*16])
1068
                                        idct_dc_add(ptr, h->mb + i*16, linesize);
1069
                                    else
1070
                                        idct_add   (ptr, h->mb + i*16, linesize);
1071
                                }
1072
                            }
1073
                        }
1074
                    }else{
1075
                        if(transform_bypass){
1076
                            idct_dc_add =
1077
                            idct_add    = s->dsp.add_pixels4;
1078
                        }else{
1079
                            idct_dc_add = h->h264dsp.h264_idct_dc_add;
1080
                            idct_add    = h->h264dsp.h264_idct_add;
1081
                        }
1082
                        for(i=0; i<16; i++){
1083
                            uint8_t * const ptr= dest_y + block_offset[i];
1084
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1085

    
1086
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1087
                                h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1088
                            }else{
1089
                                uint8_t *topright;
1090
                                int nnz, tr;
1091
                                if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1092
                                    const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1093
                                    assert(mb_y || linesize <= block_offset[i]);
1094
                                    if(!topright_avail){
1095
                                        tr= ptr[3 - linesize]*0x01010101;
1096
                                        topright= (uint8_t*) &tr;
1097
                                    }else
1098
                                        topright= ptr + 4 - linesize;
1099
                                }else
1100
                                    topright= NULL;
1101

    
1102
                                h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1103
                                nnz = h->non_zero_count_cache[ scan8[i] ];
1104
                                if(nnz){
1105
                                    if(is_h264){
1106
                                        if(nnz == 1 && h->mb[i*16])
1107
                                            idct_dc_add(ptr, h->mb + i*16, linesize);
1108
                                        else
1109
                                            idct_add   (ptr, h->mb + i*16, linesize);
1110
                                    }else
1111
                                        ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1112
                                }
1113
                            }
1114
                        }
1115
                    }
1116
                }
1117
            }else{
1118
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1119
                if(is_h264){
1120
                    if(h->non_zero_count_cache[ scan8[LUMA_DC_BLOCK_INDEX] ]){
1121
                        if(!transform_bypass)
1122
                            h->h264dsp.h264_luma_dc_dequant_idct(h->mb, h->mb_luma_dc, h->dequant4_coeff[0][s->qscale][0]);
1123
                        else{
1124
                            static const uint8_t dc_mapping[16] = { 0*16, 1*16, 4*16, 5*16, 2*16, 3*16, 6*16, 7*16,
1125
                                                                    8*16, 9*16,12*16,13*16,10*16,11*16,14*16,15*16};
1126
                            for(i = 0; i < 16; i++)
1127
                                h->mb[dc_mapping[i]] = h->mb_luma_dc[i];
1128
                        }
1129
                    }
1130
                }else
1131
                    ff_svq3_luma_dc_dequant_idct_c(h->mb, h->mb_luma_dc, s->qscale);
1132
            }
1133
            if(h->deblocking_filter)
1134
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1135
        }else if(is_h264){
1136
            hl_motion(h, dest_y, dest_cb, dest_cr,
1137
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1138
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1139
                      h->h264dsp.weight_h264_pixels_tab, h->h264dsp.biweight_h264_pixels_tab);
1140
        }
1141

    
1142

    
1143
        if(!IS_INTRA4x4(mb_type)){
1144
            if(is_h264){
1145
                if(IS_INTRA16x16(mb_type)){
1146
                    if(transform_bypass){
1147
                        if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1148
                            h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1149
                        }else{
1150
                            for(i=0; i<16; i++){
1151
                                if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1152
                                    s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1153
                            }
1154
                        }
1155
                    }else{
1156
                         h->h264dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1157
                    }
1158
                }else if(h->cbp&15){
1159
                    if(transform_bypass){
1160
                        const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1161
                        idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1162
                        for(i=0; i<16; i+=di){
1163
                            if(h->non_zero_count_cache[ scan8[i] ]){
1164
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1165
                            }
1166
                        }
1167
                    }else{
1168
                        if(IS_8x8DCT(mb_type)){
1169
                            h->h264dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1170
                        }else{
1171
                            h->h264dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1172
                        }
1173
                    }
1174
                }
1175
            }else{
1176
                for(i=0; i<16; i++){
1177
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1178
                        uint8_t * const ptr= dest_y + block_offset[i];
1179
                        ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1180
                    }
1181
                }
1182
            }
1183
        }
1184

    
1185
        if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1186
            uint8_t *dest[2] = {dest_cb, dest_cr};
1187
            if(transform_bypass){
1188
                if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1189
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1190
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1191
                }else{
1192
                    idct_add = s->dsp.add_pixels4;
1193
                    for(i=16; i<16+8; i++){
1194
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1195
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1196
                    }
1197
                }
1198
            }else{
1199
                int chroma_qpu = h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0];
1200
                int chroma_qpv = h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0];
1201
                if(is_h264){
1202
                    if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+0] ])
1203
                        h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+0*16, &h->mb_chroma_dc[0], chroma_qpu );
1204
                    if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+1] ])
1205
                        h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+4*16, &h->mb_chroma_dc[1], chroma_qpv );
1206
                    h->h264dsp.h264_idct_add8(dest, block_offset,
1207
                                              h->mb, uvlinesize,
1208
                                              h->non_zero_count_cache);
1209
                }else{
1210
                    h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+0*16, &h->mb_chroma_dc[0], chroma_qpu );
1211
                    h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+4*16, &h->mb_chroma_dc[1], chroma_qpv );
1212
                    for(i=16; i<16+8; i++){
1213
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1214
                            uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1215
                            ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1216
                        }
1217
                    }
1218
                }
1219
            }
1220
        }
1221
    }
1222
    if(h->cbp || IS_INTRA(mb_type))
1223
        s->dsp.clear_blocks(h->mb);
1224
}
1225

    
1226
/**
1227
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
1228
 */
1229
static void hl_decode_mb_simple(H264Context *h){
1230
    hl_decode_mb_internal(h, 1);
1231
}
1232

    
1233
/**
1234
 * Process a macroblock; this handles edge cases, such as interlacing.
1235
 */
1236
static void av_noinline hl_decode_mb_complex(H264Context *h){
1237
    hl_decode_mb_internal(h, 0);
1238
}
1239

    
1240
void ff_h264_hl_decode_mb(H264Context *h){
1241
    MpegEncContext * const s = &h->s;
1242
    const int mb_xy= h->mb_xy;
1243
    const int mb_type= s->current_picture.mb_type[mb_xy];
1244
    int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1245

    
1246
    if (is_complex)
1247
        hl_decode_mb_complex(h);
1248
    else hl_decode_mb_simple(h);
1249
}
1250

    
1251
static int pred_weight_table(H264Context *h){
1252
    MpegEncContext * const s = &h->s;
1253
    int list, i;
1254
    int luma_def, chroma_def;
1255

    
1256
    h->use_weight= 0;
1257
    h->use_weight_chroma= 0;
1258
    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1259
    if(CHROMA)
1260
        h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1261
    luma_def = 1<<h->luma_log2_weight_denom;
1262
    chroma_def = 1<<h->chroma_log2_weight_denom;
1263

    
1264
    for(list=0; list<2; list++){
1265
        h->luma_weight_flag[list]   = 0;
1266
        h->chroma_weight_flag[list] = 0;
1267
        for(i=0; i<h->ref_count[list]; i++){
1268
            int luma_weight_flag, chroma_weight_flag;
1269

    
1270
            luma_weight_flag= get_bits1(&s->gb);
1271
            if(luma_weight_flag){
1272
                h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
1273
                h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
1274
                if(   h->luma_weight[i][list][0] != luma_def
1275
                   || h->luma_weight[i][list][1] != 0) {
1276
                    h->use_weight= 1;
1277
                    h->luma_weight_flag[list]= 1;
1278
                }
1279
            }else{
1280
                h->luma_weight[i][list][0]= luma_def;
1281
                h->luma_weight[i][list][1]= 0;
1282
            }
1283

    
1284
            if(CHROMA){
1285
                chroma_weight_flag= get_bits1(&s->gb);
1286
                if(chroma_weight_flag){
1287
                    int j;
1288
                    for(j=0; j<2; j++){
1289
                        h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
1290
                        h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
1291
                        if(   h->chroma_weight[i][list][j][0] != chroma_def
1292
                           || h->chroma_weight[i][list][j][1] != 0) {
1293
                            h->use_weight_chroma= 1;
1294
                            h->chroma_weight_flag[list]= 1;
1295
                        }
1296
                    }
1297
                }else{
1298
                    int j;
1299
                    for(j=0; j<2; j++){
1300
                        h->chroma_weight[i][list][j][0]= chroma_def;
1301
                        h->chroma_weight[i][list][j][1]= 0;
1302
                    }
1303
                }
1304
            }
1305
        }
1306
        if(h->slice_type_nos != FF_B_TYPE) break;
1307
    }
1308
    h->use_weight= h->use_weight || h->use_weight_chroma;
1309
    return 0;
1310
}
1311

    
1312
/**
1313
 * Initialize implicit_weight table.
1314
 * @param field  0/1 initialize the weight for interlaced MBAFF
1315
 *                -1 initializes the rest
1316
 */
1317
static void implicit_weight_table(H264Context *h, int field){
1318
    MpegEncContext * const s = &h->s;
1319
    int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
1320

    
1321
    for (i = 0; i < 2; i++) {
1322
        h->luma_weight_flag[i]   = 0;
1323
        h->chroma_weight_flag[i] = 0;
1324
    }
1325

    
1326
    if(field < 0){
1327
        cur_poc = s->current_picture_ptr->poc;
1328
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF
1329
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1330
        h->use_weight= 0;
1331
        h->use_weight_chroma= 0;
1332
        return;
1333
    }
1334
        ref_start= 0;
1335
        ref_count0= h->ref_count[0];
1336
        ref_count1= h->ref_count[1];
1337
    }else{
1338
        cur_poc = s->current_picture_ptr->field_poc[field];
1339
        ref_start= 16;
1340
        ref_count0= 16+2*h->ref_count[0];
1341
        ref_count1= 16+2*h->ref_count[1];
1342
    }
1343

    
1344
    h->use_weight= 2;
1345
    h->use_weight_chroma= 2;
1346
    h->luma_log2_weight_denom= 5;
1347
    h->chroma_log2_weight_denom= 5;
1348

    
1349
    for(ref0=ref_start; ref0 < ref_count0; ref0++){
1350
        int poc0 = h->ref_list[0][ref0].poc;
1351
        for(ref1=ref_start; ref1 < ref_count1; ref1++){
1352
            int poc1 = h->ref_list[1][ref1].poc;
1353
            int td = av_clip(poc1 - poc0, -128, 127);
1354
            int w= 32;
1355
            if(td){
1356
                int tb = av_clip(cur_poc - poc0, -128, 127);
1357
                int tx = (16384 + (FFABS(td) >> 1)) / td;
1358
                int dist_scale_factor = (tb*tx + 32) >> 8;
1359
                if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
1360
                    w = 64 - dist_scale_factor;
1361
            }
1362
            if(field<0){
1363
                h->implicit_weight[ref0][ref1][0]=
1364
                h->implicit_weight[ref0][ref1][1]= w;
1365
            }else{
1366
                h->implicit_weight[ref0][ref1][field]=w;
1367
            }
1368
        }
1369
    }
1370
}
1371

    
1372
/**
1373
 * instantaneous decoder refresh.
1374
 */
1375
static void idr(H264Context *h){
1376
    ff_h264_remove_all_refs(h);
1377
    h->prev_frame_num= 0;
1378
    h->prev_frame_num_offset= 0;
1379
    h->prev_poc_msb=
1380
    h->prev_poc_lsb= 0;
1381
}
1382

    
1383
/* forget old pics after a seek */
1384
static void flush_dpb(AVCodecContext *avctx){
1385
    H264Context *h= avctx->priv_data;
1386
    int i;
1387
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1388
        if(h->delayed_pic[i])
1389
            h->delayed_pic[i]->reference= 0;
1390
        h->delayed_pic[i]= NULL;
1391
    }
1392
    h->outputed_poc= INT_MIN;
1393
    h->prev_interlaced_frame = 1;
1394
    idr(h);
1395
    if(h->s.current_picture_ptr)
1396
        h->s.current_picture_ptr->reference= 0;
1397
    h->s.first_field= 0;
1398
    ff_h264_reset_sei(h);
1399
    ff_mpeg_flush(avctx);
1400
}
1401

    
1402
static int init_poc(H264Context *h){
1403
    MpegEncContext * const s = &h->s;
1404
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1405
    int field_poc[2];
1406
    Picture *cur = s->current_picture_ptr;
1407

    
1408
    h->frame_num_offset= h->prev_frame_num_offset;
1409
    if(h->frame_num < h->prev_frame_num)
1410
        h->frame_num_offset += max_frame_num;
1411

    
1412
    if(h->sps.poc_type==0){
1413
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1414

    
1415
        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1416
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1417
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1418
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1419
        else
1420
            h->poc_msb = h->prev_poc_msb;
1421
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1422
        field_poc[0] =
1423
        field_poc[1] = h->poc_msb + h->poc_lsb;
1424
        if(s->picture_structure == PICT_FRAME)
1425
            field_poc[1] += h->delta_poc_bottom;
1426
    }else if(h->sps.poc_type==1){
1427
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1428
        int i;
1429

    
1430
        if(h->sps.poc_cycle_length != 0)
1431
            abs_frame_num = h->frame_num_offset + h->frame_num;
1432
        else
1433
            abs_frame_num = 0;
1434

    
1435
        if(h->nal_ref_idc==0 && abs_frame_num > 0)
1436
            abs_frame_num--;
1437

    
1438
        expected_delta_per_poc_cycle = 0;
1439
        for(i=0; i < h->sps.poc_cycle_length; i++)
1440
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1441

    
1442
        if(abs_frame_num > 0){
1443
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1444
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1445

    
1446
            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1447
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
1448
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1449
        } else
1450
            expectedpoc = 0;
1451

    
1452
        if(h->nal_ref_idc == 0)
1453
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1454

    
1455
        field_poc[0] = expectedpoc + h->delta_poc[0];
1456
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1457

    
1458
        if(s->picture_structure == PICT_FRAME)
1459
            field_poc[1] += h->delta_poc[1];
1460
    }else{
1461
        int poc= 2*(h->frame_num_offset + h->frame_num);
1462

    
1463
        if(!h->nal_ref_idc)
1464
            poc--;
1465

    
1466
        field_poc[0]= poc;
1467
        field_poc[1]= poc;
1468
    }
1469

    
1470
    if(s->picture_structure != PICT_BOTTOM_FIELD)
1471
        s->current_picture_ptr->field_poc[0]= field_poc[0];
1472
    if(s->picture_structure != PICT_TOP_FIELD)
1473
        s->current_picture_ptr->field_poc[1]= field_poc[1];
1474
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1475

    
1476
    return 0;
1477
}
1478

    
1479

    
1480
/**
1481
 * initialize scan tables
1482
 */
1483
static void init_scan_tables(H264Context *h){
1484
    int i;
1485
    for(i=0; i<16; i++){
1486
#define T(x) (x>>2) | ((x<<2) & 0xF)
1487
        h->zigzag_scan[i] = T(zigzag_scan[i]);
1488
        h-> field_scan[i] = T( field_scan[i]);
1489
#undef T
1490
    }
1491
    for(i=0; i<64; i++){
1492
#define T(x) (x>>3) | ((x&7)<<3)
1493
        h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
1494
        h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1495
        h->field_scan8x8[i]        = T(field_scan8x8[i]);
1496
        h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
1497
#undef T
1498
    }
1499
    if(h->sps.transform_bypass){ //FIXME same ugly
1500
        h->zigzag_scan_q0          = zigzag_scan;
1501
        h->zigzag_scan8x8_q0       = ff_zigzag_direct;
1502
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1503
        h->field_scan_q0           = field_scan;
1504
        h->field_scan8x8_q0        = field_scan8x8;
1505
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
1506
    }else{
1507
        h->zigzag_scan_q0          = h->zigzag_scan;
1508
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
1509
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1510
        h->field_scan_q0           = h->field_scan;
1511
        h->field_scan8x8_q0        = h->field_scan8x8;
1512
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
1513
    }
1514
}
1515

    
1516
static void field_end(H264Context *h){
1517
    MpegEncContext * const s = &h->s;
1518
    AVCodecContext * const avctx= s->avctx;
1519
    s->mb_y= 0;
1520

    
1521
    s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1522
    s->current_picture_ptr->pict_type= s->pict_type;
1523

    
1524
    if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1525
        ff_vdpau_h264_set_reference_frames(s);
1526

    
1527
    if(!s->dropable) {
1528
        ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1529
        h->prev_poc_msb= h->poc_msb;
1530
        h->prev_poc_lsb= h->poc_lsb;
1531
    }
1532
    h->prev_frame_num_offset= h->frame_num_offset;
1533
    h->prev_frame_num= h->frame_num;
1534

    
1535
    if (avctx->hwaccel) {
1536
        if (avctx->hwaccel->end_frame(avctx) < 0)
1537
            av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1538
    }
1539

    
1540
    if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1541
        ff_vdpau_h264_picture_complete(s);
1542

    
1543
    /*
1544
     * FIXME: Error handling code does not seem to support interlaced
1545
     * when slices span multiple rows
1546
     * The ff_er_add_slice calls don't work right for bottom
1547
     * fields; they cause massive erroneous error concealing
1548
     * Error marking covers both fields (top and bottom).
1549
     * This causes a mismatched s->error_count
1550
     * and a bad error table. Further, the error count goes to
1551
     * INT_MAX when called for bottom field, because mb_y is
1552
     * past end by one (callers fault) and resync_mb_y != 0
1553
     * causes problems for the first MB line, too.
1554
     */
1555
    if (!FIELD_PICTURE)
1556
        ff_er_frame_end(s);
1557

    
1558
    MPV_frame_end(s);
1559

    
1560
    h->current_slice=0;
1561
}
1562

    
1563
/**
1564
 * Replicate H264 "master" context to thread contexts.
1565
 */
1566
static void clone_slice(H264Context *dst, H264Context *src)
1567
{
1568
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
1569
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
1570
    dst->s.current_picture      = src->s.current_picture;
1571
    dst->s.linesize             = src->s.linesize;
1572
    dst->s.uvlinesize           = src->s.uvlinesize;
1573
    dst->s.first_field          = src->s.first_field;
1574

    
1575
    dst->prev_poc_msb           = src->prev_poc_msb;
1576
    dst->prev_poc_lsb           = src->prev_poc_lsb;
1577
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
1578
    dst->prev_frame_num         = src->prev_frame_num;
1579
    dst->short_ref_count        = src->short_ref_count;
1580

    
1581
    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
1582
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
1583
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1584
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
1585

    
1586
    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
1587
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
1588
}
1589

    
1590
/**
1591
 * decodes a slice header.
1592
 * This will also call MPV_common_init() and frame_start() as needed.
1593
 *
1594
 * @param h h264context
1595
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1596
 *
1597
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1598
 */
1599
static int decode_slice_header(H264Context *h, H264Context *h0){
1600
    MpegEncContext * const s = &h->s;
1601
    MpegEncContext * const s0 = &h0->s;
1602
    unsigned int first_mb_in_slice;
1603
    unsigned int pps_id;
1604
    int num_ref_idx_active_override_flag;
1605
    unsigned int slice_type, tmp, i, j;
1606
    int default_ref_list_done = 0;
1607
    int last_pic_structure;
1608

    
1609
    s->dropable= h->nal_ref_idc == 0;
1610

    
1611
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1612
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1613
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1614
    }else{
1615
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1616
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1617
    }
1618

    
1619
    first_mb_in_slice= get_ue_golomb(&s->gb);
1620

    
1621
    if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1622
        if(h0->current_slice && FIELD_PICTURE){
1623
            field_end(h);
1624
        }
1625

    
1626
        h0->current_slice = 0;
1627
        if (!s0->first_field)
1628
            s->current_picture_ptr= NULL;
1629
    }
1630

    
1631
    slice_type= get_ue_golomb_31(&s->gb);
1632
    if(slice_type > 9){
1633
        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);
1634
        return -1;
1635
    }
1636
    if(slice_type > 4){
1637
        slice_type -= 5;
1638
        h->slice_type_fixed=1;
1639
    }else
1640
        h->slice_type_fixed=0;
1641

    
1642
    slice_type= golomb_to_pict_type[ slice_type ];
1643
    if (slice_type == FF_I_TYPE
1644
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1645
        default_ref_list_done = 1;
1646
    }
1647
    h->slice_type= slice_type;
1648
    h->slice_type_nos= slice_type & 3;
1649

    
1650
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1651

    
1652
    pps_id= get_ue_golomb(&s->gb);
1653
    if(pps_id>=MAX_PPS_COUNT){
1654
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1655
        return -1;
1656
    }
1657
    if(!h0->pps_buffers[pps_id]) {
1658
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1659
        return -1;
1660
    }
1661
    h->pps= *h0->pps_buffers[pps_id];
1662

    
1663
    if(!h0->sps_buffers[h->pps.sps_id]) {
1664
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1665
        return -1;
1666
    }
1667
    h->sps = *h0->sps_buffers[h->pps.sps_id];
1668

    
1669
    s->avctx->profile = h->sps.profile_idc;
1670
    s->avctx->level   = h->sps.level_idc;
1671
    s->avctx->refs    = h->sps.ref_frame_count;
1672

    
1673
    if(h == h0 && h->dequant_coeff_pps != pps_id){
1674
        h->dequant_coeff_pps = pps_id;
1675
        init_dequant_tables(h);
1676
    }
1677

    
1678
    s->mb_width= h->sps.mb_width;
1679
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1680

    
1681
    h->b_stride=  s->mb_width*4;
1682

    
1683
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1684
    if(h->sps.frame_mbs_only_flag)
1685
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1686
    else
1687
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 7);
1688

    
1689
    if (s->context_initialized
1690
        && (   s->width != s->avctx->width || s->height != s->avctx->height
1691
            || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
1692
        if(h != h0)
1693
            return -1;   // width / height changed during parallelized decoding
1694
        free_tables(h);
1695
        flush_dpb(s->avctx);
1696
        MPV_common_end(s);
1697
    }
1698
    if (!s->context_initialized) {
1699
        if(h != h0)
1700
            return -1;  // we cant (re-)initialize context during parallel decoding
1701

    
1702
        avcodec_set_dimensions(s->avctx, s->width, s->height);
1703
        s->avctx->sample_aspect_ratio= h->sps.sar;
1704
        av_assert0(s->avctx->sample_aspect_ratio.den);
1705

    
1706
        if(h->sps.video_signal_type_present_flag){
1707
            s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1708
            if(h->sps.colour_description_present_flag){
1709
                s->avctx->color_primaries = h->sps.color_primaries;
1710
                s->avctx->color_trc       = h->sps.color_trc;
1711
                s->avctx->colorspace      = h->sps.colorspace;
1712
            }
1713
        }
1714

    
1715
        if(h->sps.timing_info_present_flag){
1716
            int64_t den= h->sps.time_scale;
1717
            if(h->x264_build < 44U)
1718
                den *= 2;
1719
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1720
                      h->sps.num_units_in_tick, den, 1<<30);
1721
        }
1722
        s->avctx->pix_fmt = s->avctx->get_format(s->avctx,
1723
                                                 s->avctx->codec->pix_fmts ?
1724
                                                 s->avctx->codec->pix_fmts :
1725
                                                 s->avctx->color_range == AVCOL_RANGE_JPEG ?
1726
                                                 hwaccel_pixfmt_list_h264_jpeg_420 :
1727
                                                 ff_hwaccel_pixfmt_list_420);
1728
        s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1729

    
1730
        if (MPV_common_init(s) < 0)
1731
            return -1;
1732
        s->first_field = 0;
1733
        h->prev_interlaced_frame = 1;
1734

    
1735
        init_scan_tables(h);
1736
        ff_h264_alloc_tables(h);
1737

    
1738
        for(i = 1; i < s->avctx->thread_count; i++) {
1739
            H264Context *c;
1740
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1741
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1742
            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1743
            c->h264dsp = h->h264dsp;
1744
            c->sps = h->sps;
1745
            c->pps = h->pps;
1746
            init_scan_tables(c);
1747
            clone_tables(c, h, i);
1748
        }
1749

    
1750
        for(i = 0; i < s->avctx->thread_count; i++)
1751
            if(context_init(h->thread_context[i]) < 0)
1752
                return -1;
1753
    }
1754

    
1755
    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1756

    
1757
    h->mb_mbaff = 0;
1758
    h->mb_aff_frame = 0;
1759
    last_pic_structure = s0->picture_structure;
1760
    if(h->sps.frame_mbs_only_flag){
1761
        s->picture_structure= PICT_FRAME;
1762
    }else{
1763
        if(get_bits1(&s->gb)) { //field_pic_flag
1764
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1765
        } else {
1766
            s->picture_structure= PICT_FRAME;
1767
            h->mb_aff_frame = h->sps.mb_aff;
1768
        }
1769
    }
1770
    h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1771

    
1772
    if(h0->current_slice == 0){
1773
        while(h->frame_num !=  h->prev_frame_num &&
1774
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1775
            Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1776
            av_log(h->s.avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1777
            if (ff_h264_frame_start(h) < 0)
1778
                return -1;
1779
            h->prev_frame_num++;
1780
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1781
            s->current_picture_ptr->frame_num= h->prev_frame_num;
1782
            ff_generate_sliding_window_mmcos(h);
1783
            ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1784
            /* Error concealment: if a ref is missing, copy the previous ref in its place.
1785
             * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
1786
             * about there being no actual duplicates.
1787
             * FIXME: this doesn't copy padding for out-of-frame motion vectors.  Given we're
1788
             * concealing a lost frame, this probably isn't noticable by comparison, but it should
1789
             * be fixed. */
1790
            if (h->short_ref_count) {
1791
                if (prev) {
1792
                    av_image_copy(h->short_ref[0]->data, h->short_ref[0]->linesize,
1793
                                  (const uint8_t**)prev->data, prev->linesize,
1794
                                  s->avctx->pix_fmt, s->mb_width*16, s->mb_height*16);
1795
                    h->short_ref[0]->poc = prev->poc+2;
1796
                }
1797
                h->short_ref[0]->frame_num = h->prev_frame_num;
1798
            }
1799
        }
1800

    
1801
        /* See if we have a decoded first field looking for a pair... */
1802
        if (s0->first_field) {
1803
            assert(s0->current_picture_ptr);
1804
            assert(s0->current_picture_ptr->data[0]);
1805
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1806

    
1807
            /* figure out if we have a complementary field pair */
1808
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1809
                /*
1810
                 * Previous field is unmatched. Don't display it, but let it
1811
                 * remain for reference if marked as such.
1812
                 */
1813
                s0->current_picture_ptr = NULL;
1814
                s0->first_field = FIELD_PICTURE;
1815

    
1816
            } else {
1817
                if (h->nal_ref_idc &&
1818
                        s0->current_picture_ptr->reference &&
1819
                        s0->current_picture_ptr->frame_num != h->frame_num) {
1820
                    /*
1821
                     * This and previous field were reference, but had
1822
                     * different frame_nums. Consider this field first in
1823
                     * pair. Throw away previous field except for reference
1824
                     * purposes.
1825
                     */
1826
                    s0->first_field = 1;
1827
                    s0->current_picture_ptr = NULL;
1828

    
1829
                } else {
1830
                    /* Second field in complementary pair */
1831
                    s0->first_field = 0;
1832
                }
1833
            }
1834

    
1835
        } else {
1836
            /* Frame or first field in a potentially complementary pair */
1837
            assert(!s0->current_picture_ptr);
1838
            s0->first_field = FIELD_PICTURE;
1839
        }
1840

    
1841
        if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1842
            s0->first_field = 0;
1843
            return -1;
1844
        }
1845
    }
1846
    if(h != h0)
1847
        clone_slice(h, h0);
1848

    
1849
    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1850

    
1851
    assert(s->mb_num == s->mb_width * s->mb_height);
1852
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1853
       first_mb_in_slice                    >= s->mb_num){
1854
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1855
        return -1;
1856
    }
1857
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1858
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1859
    if (s->picture_structure == PICT_BOTTOM_FIELD)
1860
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
1861
    assert(s->mb_y < s->mb_height);
1862

    
1863
    if(s->picture_structure==PICT_FRAME){
1864
        h->curr_pic_num=   h->frame_num;
1865
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1866
    }else{
1867
        h->curr_pic_num= 2*h->frame_num + 1;
1868
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1869
    }
1870

    
1871
    if(h->nal_unit_type == NAL_IDR_SLICE){
1872
        get_ue_golomb(&s->gb); /* idr_pic_id */
1873
    }
1874

    
1875
    if(h->sps.poc_type==0){
1876
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
1877

    
1878
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
1879
            h->delta_poc_bottom= get_se_golomb(&s->gb);
1880
        }
1881
    }
1882

    
1883
    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
1884
        h->delta_poc[0]= get_se_golomb(&s->gb);
1885

    
1886
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
1887
            h->delta_poc[1]= get_se_golomb(&s->gb);
1888
    }
1889

    
1890
    init_poc(h);
1891

    
1892
    if(h->pps.redundant_pic_cnt_present){
1893
        h->redundant_pic_count= get_ue_golomb(&s->gb);
1894
    }
1895

    
1896
    //set defaults, might be overridden a few lines later
1897
    h->ref_count[0]= h->pps.ref_count[0];
1898
    h->ref_count[1]= h->pps.ref_count[1];
1899

    
1900
    if(h->slice_type_nos != FF_I_TYPE){
1901
        if(h->slice_type_nos == FF_B_TYPE){
1902
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
1903
        }
1904
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
1905

    
1906
        if(num_ref_idx_active_override_flag){
1907
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
1908
            if(h->slice_type_nos==FF_B_TYPE)
1909
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
1910

    
1911
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
1912
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
1913
                h->ref_count[0]= h->ref_count[1]= 1;
1914
                return -1;
1915
            }
1916
        }
1917
        if(h->slice_type_nos == FF_B_TYPE)
1918
            h->list_count= 2;
1919
        else
1920
            h->list_count= 1;
1921
    }else
1922
        h->list_count= 0;
1923

    
1924
    if(!default_ref_list_done){
1925
        ff_h264_fill_default_ref_list(h);
1926
    }
1927

    
1928
    if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
1929
        return -1;
1930

    
1931
    if(h->slice_type_nos!=FF_I_TYPE){
1932
        s->last_picture_ptr= &h->ref_list[0][0];
1933
        ff_copy_picture(&s->last_picture, s->last_picture_ptr);
1934
    }
1935
    if(h->slice_type_nos==FF_B_TYPE){
1936
        s->next_picture_ptr= &h->ref_list[1][0];
1937
        ff_copy_picture(&s->next_picture, s->next_picture_ptr);
1938
    }
1939

    
1940
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
1941
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
1942
        pred_weight_table(h);
1943
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
1944
        implicit_weight_table(h, -1);
1945
    }else {
1946
        h->use_weight = 0;
1947
        for (i = 0; i < 2; i++) {
1948
            h->luma_weight_flag[i]   = 0;
1949
            h->chroma_weight_flag[i] = 0;
1950
        }
1951
    }
1952

    
1953
    if(h->nal_ref_idc)
1954
        ff_h264_decode_ref_pic_marking(h0, &s->gb);
1955

    
1956
    if(FRAME_MBAFF){
1957
        ff_h264_fill_mbaff_ref_list(h);
1958

    
1959
        if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
1960
            implicit_weight_table(h, 0);
1961
            implicit_weight_table(h, 1);
1962
        }
1963
    }
1964

    
1965
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
1966
        ff_h264_direct_dist_scale_factor(h);
1967
    ff_h264_direct_ref_list_init(h);
1968

    
1969
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
1970
        tmp = get_ue_golomb_31(&s->gb);
1971
        if(tmp > 2){
1972
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
1973
            return -1;
1974
        }
1975
        h->cabac_init_idc= tmp;
1976
    }
1977

    
1978
    h->last_qscale_diff = 0;
1979
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
1980
    if(tmp>51){
1981
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
1982
        return -1;
1983
    }
1984
    s->qscale= tmp;
1985
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
1986
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
1987
    //FIXME qscale / qp ... stuff
1988
    if(h->slice_type == FF_SP_TYPE){
1989
        get_bits1(&s->gb); /* sp_for_switch_flag */
1990
    }
1991
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
1992
        get_se_golomb(&s->gb); /* slice_qs_delta */
1993
    }
1994

    
1995
    h->deblocking_filter = 1;
1996
    h->slice_alpha_c0_offset = 52;
1997
    h->slice_beta_offset = 52;
1998
    if( h->pps.deblocking_filter_parameters_present ) {
1999
        tmp= get_ue_golomb_31(&s->gb);
2000
        if(tmp > 2){
2001
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2002
            return -1;
2003
        }
2004
        h->deblocking_filter= tmp;
2005
        if(h->deblocking_filter < 2)
2006
            h->deblocking_filter^= 1; // 1<->0
2007

    
2008
        if( h->deblocking_filter ) {
2009
            h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2010
            h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2011
            if(   h->slice_alpha_c0_offset > 104U
2012
               || h->slice_beta_offset     > 104U){
2013
                av_log(s->avctx, AV_LOG_ERROR, "deblocking filter parameters %d %d out of range\n", h->slice_alpha_c0_offset, h->slice_beta_offset);
2014
                return -1;
2015
            }
2016
        }
2017
    }
2018

    
2019
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2020
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2021
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
2022
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2023
        h->deblocking_filter= 0;
2024

    
2025
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2026
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2027
            /* Cheat slightly for speed:
2028
               Do not bother to deblock across slices. */
2029
            h->deblocking_filter = 2;
2030
        } else {
2031
            h0->max_contexts = 1;
2032
            if(!h0->single_decode_warning) {
2033
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2034
                h0->single_decode_warning = 1;
2035
            }
2036
            if(h != h0)
2037
                return 1; // deblocking switched inside frame
2038
        }
2039
    }
2040
    h->qp_thresh= 15 + 52 - FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) - FFMAX3(0, h->pps.chroma_qp_index_offset[0], h->pps.chroma_qp_index_offset[1]);
2041

    
2042
#if 0 //FMO
2043
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2044
        slice_group_change_cycle= get_bits(&s->gb, ?);
2045
#endif
2046

    
2047
    h0->last_slice_type = slice_type;
2048
    h->slice_num = ++h0->current_slice;
2049
    if(h->slice_num >= MAX_SLICES){
2050
        av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2051
    }
2052

    
2053
    for(j=0; j<2; j++){
2054
        int id_list[16];
2055
        int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2056
        for(i=0; i<16; i++){
2057
            id_list[i]= 60;
2058
            if(h->ref_list[j][i].data[0]){
2059
                int k;
2060
                uint8_t *base= h->ref_list[j][i].base[0];
2061
                for(k=0; k<h->short_ref_count; k++)
2062
                    if(h->short_ref[k]->base[0] == base){
2063
                        id_list[i]= k;
2064
                        break;
2065
                    }
2066
                for(k=0; k<h->long_ref_count; k++)
2067
                    if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2068
                        id_list[i]= h->short_ref_count + k;
2069
                        break;
2070
                    }
2071
            }
2072
        }
2073

    
2074
        ref2frm[0]=
2075
        ref2frm[1]= -1;
2076
        for(i=0; i<16; i++)
2077
            ref2frm[i+2]= 4*id_list[i]
2078
                          +(h->ref_list[j][i].reference&3);
2079
        ref2frm[18+0]=
2080
        ref2frm[18+1]= -1;
2081
        for(i=16; i<48; i++)
2082
            ref2frm[i+4]= 4*id_list[(i-16)>>1]
2083
                          +(h->ref_list[j][i].reference&3);
2084
    }
2085

    
2086
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2087
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2088

    
2089
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2090
        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",
2091
               h->slice_num,
2092
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2093
               first_mb_in_slice,
2094
               av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2095
               pps_id, h->frame_num,
2096
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2097
               h->ref_count[0], h->ref_count[1],
2098
               s->qscale,
2099
               h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2100
               h->use_weight,
2101
               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2102
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2103
               );
2104
    }
2105

    
2106
    return 0;
2107
}
2108

    
2109
int ff_h264_get_slice_type(const H264Context *h)
2110
{
2111
    switch (h->slice_type) {
2112
    case FF_P_TYPE:  return 0;
2113
    case FF_B_TYPE:  return 1;
2114
    case FF_I_TYPE:  return 2;
2115
    case FF_SP_TYPE: return 3;
2116
    case FF_SI_TYPE: return 4;
2117
    default:         return -1;
2118
    }
2119
}
2120

    
2121
/**
2122
 *
2123
 * @return non zero if the loop filter can be skiped
2124
 */
2125
static int fill_filter_caches(H264Context *h, int mb_type){
2126
    MpegEncContext * const s = &h->s;
2127
    const int mb_xy= h->mb_xy;
2128
    int top_xy, left_xy[2];
2129
    int top_type, left_type[2];
2130

    
2131
    top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
2132

    
2133
    //FIXME deblocking could skip the intra and nnz parts.
2134

    
2135
    /* Wow, what a mess, why didn't they simplify the interlacing & intra
2136
     * stuff, I can't imagine that these complex rules are worth it. */
2137

    
2138
    left_xy[1] = left_xy[0] = mb_xy-1;
2139
    if(FRAME_MBAFF){
2140
        const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
2141
        const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
2142
        if(s->mb_y&1){
2143
            if (left_mb_field_flag != curr_mb_field_flag) {
2144
                left_xy[0] -= s->mb_stride;
2145
            }
2146
        }else{
2147
            if(curr_mb_field_flag){
2148
                top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
2149
            }
2150
            if (left_mb_field_flag != curr_mb_field_flag) {
2151
                left_xy[1] += s->mb_stride;
2152
            }
2153
        }
2154
    }
2155

    
2156
    h->top_mb_xy = top_xy;
2157
    h->left_mb_xy[0] = left_xy[0];
2158
    h->left_mb_xy[1] = left_xy[1];
2159
    {
2160
        //for sufficiently low qp, filtering wouldn't do anything
2161
        //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
2162
        int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
2163
        int qp = s->current_picture.qscale_table[mb_xy];
2164
        if(qp <= qp_thresh
2165
           && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
2166
           && (top_xy   < 0 || ((qp + s->current_picture.qscale_table[top_xy    ] + 1)>>1) <= qp_thresh)){
2167
            if(!FRAME_MBAFF)
2168
                return 1;
2169
            if(   (left_xy[0]< 0            || ((qp + s->current_picture.qscale_table[left_xy[1]             ] + 1)>>1) <= qp_thresh)
2170
               && (top_xy    < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy    -s->mb_stride] + 1)>>1) <= qp_thresh))
2171
                return 1;
2172
        }
2173
    }
2174

    
2175
    top_type     = s->current_picture.mb_type[top_xy]    ;
2176
    left_type[0] = s->current_picture.mb_type[left_xy[0]];
2177
    left_type[1] = s->current_picture.mb_type[left_xy[1]];
2178
    if(h->deblocking_filter == 2){
2179
        if(h->slice_table[top_xy     ] != h->slice_num) top_type= 0;
2180
        if(h->slice_table[left_xy[0] ] != h->slice_num) left_type[0]= left_type[1]= 0;
2181
    }else{
2182
        if(h->slice_table[top_xy     ] == 0xFFFF) top_type= 0;
2183
        if(h->slice_table[left_xy[0] ] == 0xFFFF) left_type[0]= left_type[1] =0;
2184
    }
2185
    h->top_type    = top_type    ;
2186
    h->left_type[0]= left_type[0];
2187
    h->left_type[1]= left_type[1];
2188

    
2189
    if(IS_INTRA(mb_type))
2190
        return 0;
2191

    
2192
    AV_COPY64(&h->non_zero_count_cache[0+8*1], &h->non_zero_count[mb_xy][ 0]);
2193
    AV_COPY64(&h->non_zero_count_cache[0+8*2], &h->non_zero_count[mb_xy][ 8]);
2194
    AV_COPY32(&h->non_zero_count_cache[0+8*5], &h->non_zero_count[mb_xy][16]);
2195
    AV_COPY32(&h->non_zero_count_cache[4+8*3], &h->non_zero_count[mb_xy][20]);
2196
    AV_COPY64(&h->non_zero_count_cache[0+8*4], &h->non_zero_count[mb_xy][24]);
2197

    
2198
    h->cbp= h->cbp_table[mb_xy];
2199

    
2200
    {
2201
        int list;
2202
        for(list=0; list<h->list_count; list++){
2203
            int8_t *ref;
2204
            int y, b_stride;
2205
            int16_t (*mv_dst)[2];
2206
            int16_t (*mv_src)[2];
2207

    
2208
            if(!USES_LIST(mb_type, list)){
2209
                fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
2210
                AV_WN32A(&h->ref_cache[list][scan8[ 0]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2211
                AV_WN32A(&h->ref_cache[list][scan8[ 2]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2212
                AV_WN32A(&h->ref_cache[list][scan8[ 8]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2213
                AV_WN32A(&h->ref_cache[list][scan8[10]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2214
                continue;
2215
            }
2216

    
2217
            ref = &s->current_picture.ref_index[list][4*mb_xy];
2218
            {
2219
                int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2220
                AV_WN32A(&h->ref_cache[list][scan8[ 0]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2221
                AV_WN32A(&h->ref_cache[list][scan8[ 2]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2222
                ref += 2;
2223
                AV_WN32A(&h->ref_cache[list][scan8[ 8]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2224
                AV_WN32A(&h->ref_cache[list][scan8[10]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2225
            }
2226

    
2227
            b_stride = h->b_stride;
2228
            mv_dst   = &h->mv_cache[list][scan8[0]];
2229
            mv_src   = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
2230
            for(y=0; y<4; y++){
2231
                AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
2232
            }
2233

    
2234
        }
2235
    }
2236

    
2237

    
2238
/*
2239
0 . T T. T T T T
2240
1 L . .L . . . .
2241
2 L . .L . . . .
2242
3 . T TL . . . .
2243
4 L . .L . . . .
2244
5 L . .. . . . .
2245
*/
2246
//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
2247
    if(top_type){
2248
        AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][4+3*8]);
2249
    }
2250

    
2251
    if(left_type[0]){
2252
        h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][7+0*8];
2253
        h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][7+1*8];
2254
        h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][7+2*8];
2255
        h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][7+3*8];
2256
    }
2257

    
2258
    // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
2259
    if(!CABAC && h->pps.transform_8x8_mode){
2260
        if(IS_8x8DCT(top_type)){
2261
            h->non_zero_count_cache[4+8*0]=
2262
            h->non_zero_count_cache[5+8*0]= h->cbp_table[top_xy] & 4;
2263
            h->non_zero_count_cache[6+8*0]=
2264
            h->non_zero_count_cache[7+8*0]= h->cbp_table[top_xy] & 8;
2265
        }
2266
        if(IS_8x8DCT(left_type[0])){
2267
            h->non_zero_count_cache[3+8*1]=
2268
            h->non_zero_count_cache[3+8*2]= h->cbp_table[left_xy[0]]&2; //FIXME check MBAFF
2269
        }
2270
        if(IS_8x8DCT(left_type[1])){
2271
            h->non_zero_count_cache[3+8*3]=
2272
            h->non_zero_count_cache[3+8*4]= h->cbp_table[left_xy[1]]&8; //FIXME check MBAFF
2273
        }
2274

    
2275
        if(IS_8x8DCT(mb_type)){
2276
            h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
2277
            h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= h->cbp & 1;
2278

    
2279
            h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
2280
            h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
2281

    
2282
            h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
2283
            h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
2284

    
2285
            h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
2286
            h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
2287
        }
2288
    }
2289

    
2290
    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
2291
        int list;
2292
        for(list=0; list<h->list_count; list++){
2293
            if(USES_LIST(top_type, list)){
2294
                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
2295
                const int b8_xy= 4*top_xy + 2;
2296
                int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2297
                AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
2298
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
2299
                h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
2300
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
2301
                h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
2302
            }else{
2303
                AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
2304
                AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2305
            }
2306

    
2307
            if(!IS_INTERLACED(mb_type^left_type[0])){
2308
                if(USES_LIST(left_type[0], list)){
2309
                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
2310
                    const int b8_xy= 4*left_xy[0] + 1;
2311
                    int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2312
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 0 ], s->current_picture.motion_val[list][b_xy + h->b_stride*0]);
2313
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 8 ], s->current_picture.motion_val[list][b_xy + h->b_stride*1]);
2314
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 +16 ], s->current_picture.motion_val[list][b_xy + h->b_stride*2]);
2315
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 +24 ], s->current_picture.motion_val[list][b_xy + h->b_stride*3]);
2316
                    h->ref_cache[list][scan8[0] - 1 + 0 ]=
2317
                    h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*0]];
2318
                    h->ref_cache[list][scan8[0] - 1 +16 ]=
2319
                    h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*1]];
2320
                }else{
2321
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 0 ]);
2322
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 8 ]);
2323
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +16 ]);
2324
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +24 ]);
2325
                    h->ref_cache[list][scan8[0] - 1 + 0  ]=
2326
                    h->ref_cache[list][scan8[0] - 1 + 8  ]=
2327
                    h->ref_cache[list][scan8[0] - 1 + 16 ]=
2328
                    h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
2329
                }
2330
            }
2331
        }
2332
    }
2333

    
2334
    return 0;
2335
}
2336

    
2337
static void loop_filter(H264Context *h){
2338
    MpegEncContext * const s = &h->s;
2339
    uint8_t  *dest_y, *dest_cb, *dest_cr;
2340
    int linesize, uvlinesize, mb_x, mb_y;
2341
    const int end_mb_y= s->mb_y + FRAME_MBAFF;
2342
    const int old_slice_type= h->slice_type;
2343

    
2344
    if(h->deblocking_filter) {
2345
        for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2346
            for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2347
                int mb_xy, mb_type;
2348
                mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2349
                h->slice_num= h->slice_table[mb_xy];
2350
                mb_type= s->current_picture.mb_type[mb_xy];
2351
                h->list_count= h->list_counts[mb_xy];
2352

    
2353
                if(FRAME_MBAFF)
2354
                    h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2355

    
2356
                s->mb_x= mb_x;
2357
                s->mb_y= mb_y;
2358
                dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2359
                dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2360
                dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2361
                    //FIXME simplify above
2362

    
2363
                if (MB_FIELD) {
2364
                    linesize   = h->mb_linesize   = s->linesize * 2;
2365
                    uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2366
                    if(mb_y&1){ //FIXME move out of this function?
2367
                        dest_y -= s->linesize*15;
2368
                        dest_cb-= s->uvlinesize*7;
2369
                        dest_cr-= s->uvlinesize*7;
2370
                    }
2371
                } else {
2372
                    linesize   = h->mb_linesize   = s->linesize;
2373
                    uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2374
                }
2375
                backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2376
                if(fill_filter_caches(h, mb_type))
2377
                    continue;
2378
                h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2379
                h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2380

    
2381
                if (FRAME_MBAFF) {
2382
                    ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2383
                } else {
2384
                    ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2385
                }
2386
            }
2387
        }
2388
    }
2389
    h->slice_type= old_slice_type;
2390
    s->mb_x= 0;
2391
    s->mb_y= end_mb_y - FRAME_MBAFF;
2392
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2393
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2394
}
2395

    
2396
static void predict_field_decoding_flag(H264Context *h){
2397
    MpegEncContext * const s = &h->s;
2398
    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2399
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
2400
                ? s->current_picture.mb_type[mb_xy-1]
2401
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
2402
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
2403
                : 0;
2404
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2405
}
2406

    
2407
static int decode_slice(struct AVCodecContext *avctx, void *arg){
2408
    H264Context *h = *(void**)arg;
2409
    MpegEncContext * const s = &h->s;
2410
    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2411

    
2412
    s->mb_skip_run= -1;
2413

    
2414
    h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2415
                    (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2416

    
2417
    if( h->pps.cabac ) {
2418
        /* realign */
2419
        align_get_bits( &s->gb );
2420

    
2421
        /* init cabac */
2422
        ff_init_cabac_states( &h->cabac);
2423
        ff_init_cabac_decoder( &h->cabac,
2424
                               s->gb.buffer + get_bits_count(&s->gb)/8,
2425
                               (get_bits_left(&s->gb) + 7)/8);
2426

    
2427
        ff_h264_init_cabac_states(h);
2428

    
2429
        for(;;){
2430
//START_TIMER
2431
            int ret = ff_h264_decode_mb_cabac(h);
2432
            int eos;
2433
//STOP_TIMER("decode_mb_cabac")
2434

    
2435
            if(ret>=0) ff_h264_hl_decode_mb(h);
2436

    
2437
            if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2438
                s->mb_y++;
2439

    
2440
                ret = ff_h264_decode_mb_cabac(h);
2441

    
2442
                if(ret>=0) ff_h264_hl_decode_mb(h);
2443
                s->mb_y--;
2444
            }
2445
            eos = get_cabac_terminate( &h->cabac );
2446

    
2447
            if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2448
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2449
                return 0;
2450
            }
2451
            if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2452
                av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d, bytestream (%td)\n", s->mb_x, s->mb_y, h->cabac.bytestream_end - h->cabac.bytestream);
2453
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2454
                return -1;
2455
            }
2456

    
2457
            if( ++s->mb_x >= s->mb_width ) {
2458
                s->mb_x = 0;
2459
                loop_filter(h);
2460
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
2461
                ++s->mb_y;
2462
                if(FIELD_OR_MBAFF_PICTURE) {
2463
                    ++s->mb_y;
2464
                    if(FRAME_MBAFF && s->mb_y < s->mb_height)
2465
                        predict_field_decoding_flag(h);
2466
                }
2467
            }
2468

    
2469
            if( eos || s->mb_y >= s->mb_height ) {
2470
                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2471
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2472
                return 0;
2473
            }
2474
        }
2475

    
2476
    } else {
2477
        for(;;){
2478
            int ret = ff_h264_decode_mb_cavlc(h);
2479

    
2480
            if(ret>=0) ff_h264_hl_decode_mb(h);
2481

    
2482
            if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2483
                s->mb_y++;
2484
                ret = ff_h264_decode_mb_cavlc(h);
2485

    
2486
                if(ret>=0) ff_h264_hl_decode_mb(h);
2487
                s->mb_y--;
2488
            }
2489

    
2490
            if(ret<0){
2491
                av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2492
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2493

    
2494
                return -1;
2495
            }
2496

    
2497
            if(++s->mb_x >= s->mb_width){
2498
                s->mb_x=0;
2499
                loop_filter(h);
2500
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
2501
                ++s->mb_y;
2502
                if(FIELD_OR_MBAFF_PICTURE) {
2503
                    ++s->mb_y;
2504
                    if(FRAME_MBAFF && s->mb_y < s->mb_height)
2505
                        predict_field_decoding_flag(h);
2506
                }
2507
                if(s->mb_y >= s->mb_height){
2508
                    tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2509

    
2510
                    if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2511
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2512

    
2513
                        return 0;
2514
                    }else{
2515
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2516

    
2517
                        return -1;
2518
                    }
2519
                }
2520
            }
2521

    
2522
            if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2523
                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2524
                if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2525
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2526

    
2527
                    return 0;
2528
                }else{
2529
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2530

    
2531
                    return -1;
2532
                }
2533
            }
2534
        }
2535
    }
2536

    
2537
#if 0
2538
    for(;s->mb_y < s->mb_height; s->mb_y++){
2539
        for(;s->mb_x < s->mb_width; s->mb_x++){
2540
            int ret= decode_mb(h);
2541

2542
            ff_h264_hl_decode_mb(h);
2543

2544
            if(ret<0){
2545
                av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2546
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2547

2548
                return -1;
2549
            }
2550

2551
            if(++s->mb_x >= s->mb_width){
2552
                s->mb_x=0;
2553
                if(++s->mb_y >= s->mb_height){
2554
                    if(get_bits_count(s->gb) == s->gb.size_in_bits){
2555
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2556

2557
                        return 0;
2558
                    }else{
2559
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2560

2561
                        return -1;
2562
                    }
2563
                }
2564
            }
2565

2566
            if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2567
                if(get_bits_count(s->gb) == s->gb.size_in_bits){
2568
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
2569

2570
                    return 0;
2571
                }else{
2572
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
2573

2574
                    return -1;
2575
                }
2576
            }
2577
        }
2578
        s->mb_x=0;
2579
        ff_draw_horiz_band(s, 16*s->mb_y, 16);
2580
    }
2581
#endif
2582
    return -1; //not reached
2583
}
2584

    
2585
/**
2586
 * Call decode_slice() for each context.
2587
 *
2588
 * @param h h264 master context
2589
 * @param context_count number of contexts to execute
2590
 */
2591
static void execute_decode_slices(H264Context *h, int context_count){
2592
    MpegEncContext * const s = &h->s;
2593
    AVCodecContext * const avctx= s->avctx;
2594
    H264Context *hx;
2595
    int i;
2596

    
2597
    if (s->avctx->hwaccel)
2598
        return;
2599
    if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2600
        return;
2601
    if(context_count == 1) {
2602
        decode_slice(avctx, &h);
2603
    } else {
2604
        for(i = 1; i < context_count; i++) {
2605
            hx = h->thread_context[i];
2606
            hx->s.error_recognition = avctx->error_recognition;
2607
            hx->s.error_count = 0;
2608
        }
2609

    
2610
        avctx->execute(avctx, (void *)decode_slice,
2611
                       h->thread_context, NULL, context_count, sizeof(void*));
2612

    
2613
        /* pull back stuff from slices to master context */
2614
        hx = h->thread_context[context_count - 1];
2615
        s->mb_x = hx->s.mb_x;
2616
        s->mb_y = hx->s.mb_y;
2617
        s->dropable = hx->s.dropable;
2618
        s->picture_structure = hx->s.picture_structure;
2619
        for(i = 1; i < context_count; i++)
2620
            h->s.error_count += h->thread_context[i]->s.error_count;
2621
    }
2622
}
2623

    
2624

    
2625
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2626
    MpegEncContext * const s = &h->s;
2627
    AVCodecContext * const avctx= s->avctx;
2628
    int buf_index=0;
2629
    H264Context *hx; ///< thread context
2630
    int context_count = 0;
2631
    int next_avc= h->is_avc ? 0 : buf_size;
2632

    
2633
    h->max_contexts = avctx->thread_count;
2634
#if 0
2635
    int i;
2636
    for(i=0; i<50; i++){
2637
        av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2638
    }
2639
#endif
2640
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2641
        h->current_slice = 0;
2642
        if (!s->first_field)
2643
            s->current_picture_ptr= NULL;
2644
        ff_h264_reset_sei(h);
2645
    }
2646

    
2647
    for(;;){
2648
        int consumed;
2649
        int dst_length;
2650
        int bit_length;
2651
        const uint8_t *ptr;
2652
        int i, nalsize = 0;
2653
        int err;
2654

    
2655
        if(buf_index >= next_avc) {
2656
            if(buf_index >= buf_size) break;
2657
            nalsize = 0;
2658
            for(i = 0; i < h->nal_length_size; i++)
2659
                nalsize = (nalsize << 8) | buf[buf_index++];
2660
            if(nalsize <= 0 || nalsize > buf_size - buf_index){
2661
                av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2662
                break;
2663
            }
2664
            next_avc= buf_index + nalsize;
2665
        } else {
2666
            // start code prefix search
2667
            for(; buf_index + 3 < next_avc; buf_index++){
2668
                // This should always succeed in the first iteration.
2669
                if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2670
                    break;
2671
            }
2672

    
2673
            if(buf_index+3 >= buf_size) break;
2674

    
2675
            buf_index+=3;
2676
            if(buf_index >= next_avc) continue;
2677
        }
2678

    
2679
        hx = h->thread_context[context_count];
2680

    
2681
        ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2682
        if (ptr==NULL || dst_length < 0){
2683
            return -1;
2684
        }
2685
        i= buf_index + consumed;
2686
        if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2687
           buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2688
            s->workaround_bugs |= FF_BUG_TRUNCATED;
2689

    
2690
        if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2691
        while(ptr[dst_length - 1] == 0 && dst_length > 0)
2692
            dst_length--;
2693
        }
2694
        bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2695

    
2696
        if(s->avctx->debug&FF_DEBUG_STARTCODE){
2697
            av_log(h->s.avctx, AV_LOG_DEBUG, "NAL %d at %d/%d length %d\n", hx->nal_unit_type, buf_index, buf_size, dst_length);
2698
        }
2699

    
2700
        if (h->is_avc && (nalsize != consumed) && nalsize){
2701
            av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2702
        }
2703

    
2704
        buf_index += consumed;
2705

    
2706
        if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
2707
           ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
2708
            continue;
2709

    
2710
      again:
2711
        err = 0;
2712
        switch(hx->nal_unit_type){
2713
        case NAL_IDR_SLICE:
2714
            if (h->nal_unit_type != NAL_IDR_SLICE) {
2715
                av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2716
                return -1;
2717
            }
2718
            idr(h); //FIXME ensure we don't loose some frames if there is reordering
2719
        case NAL_SLICE:
2720
            init_get_bits(&hx->s.gb, ptr, bit_length);
2721
            hx->intra_gb_ptr=
2722
            hx->inter_gb_ptr= &hx->s.gb;
2723
            hx->s.data_partitioning = 0;
2724

    
2725
            if((err = decode_slice_header(hx, h)))
2726
               break;
2727

    
2728
            if (h->current_slice == 1) {
2729
                if (s->avctx->hwaccel && s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2730
                    return -1;
2731
                if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2732
                    ff_vdpau_h264_picture_start(s);
2733
            }
2734

    
2735
            s->current_picture_ptr->key_frame |=
2736
                    (hx->nal_unit_type == NAL_IDR_SLICE) ||
2737
                    (h->sei_recovery_frame_cnt >= 0);
2738
            if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2739
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2740
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2741
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2742
               && avctx->skip_frame < AVDISCARD_ALL){
2743
                if(avctx->hwaccel) {
2744
                    if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2745
                        return -1;
2746
                }else
2747
                if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2748
                    static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2749
                    ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2750
                    ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2751
                }else
2752
                    context_count++;
2753
            }
2754
            break;
2755
        case NAL_DPA:
2756
            init_get_bits(&hx->s.gb, ptr, bit_length);
2757
            hx->intra_gb_ptr=
2758
            hx->inter_gb_ptr= NULL;
2759

    
2760
            if ((err = decode_slice_header(hx, h)) < 0)
2761
                break;
2762

    
2763
            hx->s.data_partitioning = 1;
2764

    
2765
            break;
2766
        case NAL_DPB:
2767
            init_get_bits(&hx->intra_gb, ptr, bit_length);
2768
            hx->intra_gb_ptr= &hx->intra_gb;
2769
            break;
2770
        case NAL_DPC:
2771
            init_get_bits(&hx->inter_gb, ptr, bit_length);
2772
            hx->inter_gb_ptr= &hx->inter_gb;
2773

    
2774
            if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2775
               && s->context_initialized
2776
               && s->hurry_up < 5
2777
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2778
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2779
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2780
               && avctx->skip_frame < AVDISCARD_ALL)
2781
                context_count++;
2782
            break;
2783
        case NAL_SEI:
2784
            init_get_bits(&s->gb, ptr, bit_length);
2785
            ff_h264_decode_sei(h);
2786
            break;
2787
        case NAL_SPS:
2788
            init_get_bits(&s->gb, ptr, bit_length);
2789
            ff_h264_decode_seq_parameter_set(h);
2790

    
2791
            if(s->flags& CODEC_FLAG_LOW_DELAY)
2792
                s->low_delay=1;
2793

    
2794
            if(avctx->has_b_frames < 2)
2795
                avctx->has_b_frames= !s->low_delay;
2796
            break;
2797
        case NAL_PPS:
2798
            init_get_bits(&s->gb, ptr, bit_length);
2799

    
2800
            ff_h264_decode_picture_parameter_set(h, bit_length);
2801

    
2802
            break;
2803
        case NAL_AUD:
2804
        case NAL_END_SEQUENCE:
2805
        case NAL_END_STREAM:
2806
        case NAL_FILLER_DATA:
2807
        case NAL_SPS_EXT:
2808
        case NAL_AUXILIARY_SLICE:
2809
            break;
2810
        default:
2811
            av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2812
        }
2813

    
2814
        if(context_count == h->max_contexts) {
2815
            execute_decode_slices(h, context_count);
2816
            context_count = 0;
2817
        }
2818

    
2819
        if (err < 0)
2820
            av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2821
        else if(err == 1) {
2822
            /* Slice could not be decoded in parallel mode, copy down
2823
             * NAL unit stuff to context 0 and restart. Note that
2824
             * rbsp_buffer is not transferred, but since we no longer
2825
             * run in parallel mode this should not be an issue. */
2826
            h->nal_unit_type = hx->nal_unit_type;
2827
            h->nal_ref_idc   = hx->nal_ref_idc;
2828
            hx = h;
2829
            goto again;
2830
        }
2831
    }
2832
    if(context_count)
2833
        execute_decode_slices(h, context_count);
2834
    return buf_index;
2835
}
2836

    
2837
/**
2838
 * returns the number of bytes consumed for building the current frame
2839
 */
2840
static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2841
        if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2842
        if(pos+10>buf_size) pos=buf_size; // oops ;)
2843

    
2844
        return pos;
2845
}
2846

    
2847
static int decode_frame(AVCodecContext *avctx,
2848
                             void *data, int *data_size,
2849
                             AVPacket *avpkt)
2850
{
2851
    const uint8_t *buf = avpkt->data;
2852
    int buf_size = avpkt->size;
2853
    H264Context *h = avctx->priv_data;
2854
    MpegEncContext *s = &h->s;
2855
    AVFrame *pict = data;
2856
    int buf_index;
2857

    
2858
    s->flags= avctx->flags;
2859
    s->flags2= avctx->flags2;
2860

    
2861
   /* end of stream, output what is still in the buffers */
2862
 out:
2863
    if (buf_size == 0) {
2864
        Picture *out;
2865
        int i, out_idx;
2866

    
2867
//FIXME factorize this with the output code below
2868
        out = h->delayed_pic[0];
2869
        out_idx = 0;
2870
        for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2871
            if(h->delayed_pic[i]->poc < out->poc){
2872
                out = h->delayed_pic[i];
2873
                out_idx = i;
2874
            }
2875

    
2876
        for(i=out_idx; h->delayed_pic[i]; i++)
2877
            h->delayed_pic[i] = h->delayed_pic[i+1];
2878

    
2879
        if(out){
2880
            *data_size = sizeof(AVFrame);
2881
            *pict= *(AVFrame*)out;
2882
        }
2883

    
2884
        return 0;
2885
    }
2886

    
2887
    buf_index=decode_nal_units(h, buf, buf_size);
2888
    if(buf_index < 0)
2889
        return -1;
2890

    
2891
    if (!s->current_picture_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
2892
        buf_size = 0;
2893
        goto out;
2894
    }
2895

    
2896
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
2897
        if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
2898
        av_log(avctx, AV_LOG_ERROR, "no frame!\n");
2899
        return -1;
2900
    }
2901

    
2902
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
2903
        Picture *out = s->current_picture_ptr;
2904
        Picture *cur = s->current_picture_ptr;
2905
        int i, pics, out_of_order, out_idx;
2906

    
2907
        field_end(h);
2908

    
2909
        if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
2910
            /* Wait for second field. */
2911
            *data_size = 0;
2912

    
2913
        } else {
2914
            cur->interlaced_frame = 0;
2915
            cur->repeat_pict = 0;
2916

    
2917
            /* Signal interlacing information externally. */
2918
            /* Prioritize picture timing SEI information over used decoding process if it exists. */
2919

    
2920
            if(h->sps.pic_struct_present_flag){
2921
                switch (h->sei_pic_struct)
2922
                {
2923
                case SEI_PIC_STRUCT_FRAME:
2924
                    break;
2925
                case SEI_PIC_STRUCT_TOP_FIELD:
2926
                case SEI_PIC_STRUCT_BOTTOM_FIELD:
2927
                    cur->interlaced_frame = 1;
2928
                    break;
2929
                case SEI_PIC_STRUCT_TOP_BOTTOM:
2930
                case SEI_PIC_STRUCT_BOTTOM_TOP:
2931
                    if (FIELD_OR_MBAFF_PICTURE)
2932
                        cur->interlaced_frame = 1;
2933
                    else
2934
                        // try to flag soft telecine progressive
2935
                        cur->interlaced_frame = h->prev_interlaced_frame;
2936
                    break;
2937
                case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
2938
                case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
2939
                    // Signal the possibility of telecined film externally (pic_struct 5,6)
2940
                    // From these hints, let the applications decide if they apply deinterlacing.
2941
                    cur->repeat_pict = 1;
2942
                    break;
2943
                case SEI_PIC_STRUCT_FRAME_DOUBLING:
2944
                    // Force progressive here, as doubling interlaced frame is a bad idea.
2945
                    cur->repeat_pict = 2;
2946
                    break;
2947
                case SEI_PIC_STRUCT_FRAME_TRIPLING:
2948
                    cur->repeat_pict = 4;
2949
                    break;
2950
                }
2951

    
2952
                if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
2953
                    cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
2954
            }else{
2955
                /* Derive interlacing flag from used decoding process. */
2956
                cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
2957
            }
2958
            h->prev_interlaced_frame = cur->interlaced_frame;
2959

    
2960
            if (cur->field_poc[0] != cur->field_poc[1]){
2961
                /* Derive top_field_first from field pocs. */
2962
                cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
2963
            }else{
2964
                if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
2965
                    /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
2966
                    if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
2967
                      || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
2968
                        cur->top_field_first = 1;
2969
                    else
2970
                        cur->top_field_first = 0;
2971
                }else{
2972
                    /* Most likely progressive */
2973
                    cur->top_field_first = 0;
2974
                }
2975
            }
2976

    
2977
        //FIXME do something with unavailable reference frames
2978

    
2979
            /* Sort B-frames into display order */
2980

    
2981
            if(h->sps.bitstream_restriction_flag
2982
               && s->avctx->has_b_frames < h->sps.num_reorder_frames){
2983
                s->avctx->has_b_frames = h->sps.num_reorder_frames;
2984
                s->low_delay = 0;
2985
            }
2986

    
2987
            if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
2988
               && !h->sps.bitstream_restriction_flag){
2989
                s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
2990
                s->low_delay= 0;
2991
            }
2992

    
2993
            pics = 0;
2994
            while(h->delayed_pic[pics]) pics++;
2995

    
2996
            assert(pics <= MAX_DELAYED_PIC_COUNT);
2997

    
2998
            h->delayed_pic[pics++] = cur;
2999
            if(cur->reference == 0)
3000
                cur->reference = DELAYED_PIC_REF;
3001

    
3002
            out = h->delayed_pic[0];
3003
            out_idx = 0;
3004
            for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
3005
                if(h->delayed_pic[i]->poc < out->poc){
3006
                    out = h->delayed_pic[i];
3007
                    out_idx = i;
3008
                }
3009
            if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
3010
                h->outputed_poc= INT_MIN;
3011
            out_of_order = out->poc < h->outputed_poc;
3012

    
3013
            if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
3014
                { }
3015
            else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
3016
               || (s->low_delay &&
3017
                ((h->outputed_poc != INT_MIN && out->poc > h->outputed_poc + 2)
3018
                 || cur->pict_type == FF_B_TYPE)))
3019
            {
3020
                s->low_delay = 0;
3021
                s->avctx->has_b_frames++;
3022
            }
3023

    
3024
            if(out_of_order || pics > s->avctx->has_b_frames){
3025
                out->reference &= ~DELAYED_PIC_REF;
3026
                for(i=out_idx; h->delayed_pic[i]; i++)
3027
                    h->delayed_pic[i] = h->delayed_pic[i+1];
3028
            }
3029
            if(!out_of_order && pics > s->avctx->has_b_frames){
3030
                *data_size = sizeof(AVFrame);
3031

    
3032
                if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
3033
                    h->outputed_poc = INT_MIN;
3034
                } else
3035
                    h->outputed_poc = out->poc;
3036
                *pict= *(AVFrame*)out;
3037
            }else{
3038
                av_log(avctx, AV_LOG_DEBUG, "no picture\n");
3039
            }
3040
        }
3041
    }
3042

    
3043
    assert(pict->data[0] || !*data_size);
3044
    ff_print_debug_info(s, pict);
3045
//printf("out %d\n", (int)pict->data[0]);
3046

    
3047
    return get_consumed_bytes(s, buf_index, buf_size);
3048
}
3049
#if 0
3050
static inline void fill_mb_avail(H264Context *h){
3051
    MpegEncContext * const s = &h->s;
3052
    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3053

3054
    if(s->mb_y){
3055
        h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
3056
        h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
3057
        h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
3058
    }else{
3059
        h->mb_avail[0]=
3060
        h->mb_avail[1]=
3061
        h->mb_avail[2]= 0;
3062
    }
3063
    h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
3064
    h->mb_avail[4]= 1; //FIXME move out
3065
    h->mb_avail[5]= 0; //FIXME move out
3066
}
3067
#endif
3068

    
3069
#ifdef TEST
3070
#undef printf
3071
#undef random
3072
#define COUNT 8000
3073
#define SIZE (COUNT*40)
3074
int main(void){
3075
    int i;
3076
    uint8_t temp[SIZE];
3077
    PutBitContext pb;
3078
    GetBitContext gb;
3079
//    int int_temp[10000];
3080
    DSPContext dsp;
3081
    AVCodecContext avctx;
3082

    
3083
    dsputil_init(&dsp, &avctx);
3084

    
3085
    init_put_bits(&pb, temp, SIZE);
3086
    printf("testing unsigned exp golomb\n");
3087
    for(i=0; i<COUNT; i++){
3088
        START_TIMER
3089
        set_ue_golomb(&pb, i);
3090
        STOP_TIMER("set_ue_golomb");
3091
    }
3092
    flush_put_bits(&pb);
3093

    
3094
    init_get_bits(&gb, temp, 8*SIZE);
3095
    for(i=0; i<COUNT; i++){
3096
        int j, s;
3097

    
3098
        s= show_bits(&gb, 24);
3099

    
3100
        START_TIMER
3101
        j= get_ue_golomb(&gb);
3102
        if(j != i){
3103
            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3104
//            return -1;
3105
        }
3106
        STOP_TIMER("get_ue_golomb");
3107
    }
3108

    
3109

    
3110
    init_put_bits(&pb, temp, SIZE);
3111
    printf("testing signed exp golomb\n");
3112
    for(i=0; i<COUNT; i++){
3113
        START_TIMER
3114
        set_se_golomb(&pb, i - COUNT/2);
3115
        STOP_TIMER("set_se_golomb");
3116
    }
3117
    flush_put_bits(&pb);
3118

    
3119
    init_get_bits(&gb, temp, 8*SIZE);
3120
    for(i=0; i<COUNT; i++){
3121
        int j, s;
3122

    
3123
        s= show_bits(&gb, 24);
3124

    
3125
        START_TIMER
3126
        j= get_se_golomb(&gb);
3127
        if(j != i - COUNT/2){
3128
            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3129
//            return -1;
3130
        }
3131
        STOP_TIMER("get_se_golomb");
3132
    }
3133

    
3134
#if 0
3135
    printf("testing 4x4 (I)DCT\n");
3136

3137
    DCTELEM block[16];
3138
    uint8_t src[16], ref[16];
3139
    uint64_t error= 0, max_error=0;
3140

3141
    for(i=0; i<COUNT; i++){
3142
        int j;
3143
//        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
3144
        for(j=0; j<16; j++){
3145
            ref[j]= random()%255;
3146
            src[j]= random()%255;
3147
        }
3148

3149
        h264_diff_dct_c(block, src, ref, 4);
3150

3151
        //normalize
3152
        for(j=0; j<16; j++){
3153
//            printf("%d ", block[j]);
3154
            block[j]= block[j]*4;
3155
            if(j&1) block[j]= (block[j]*4 + 2)/5;
3156
            if(j&4) block[j]= (block[j]*4 + 2)/5;
3157
        }
3158
//        printf("\n");
3159

3160
        h->h264dsp.h264_idct_add(ref, block, 4);
3161
/*        for(j=0; j<16; j++){
3162
            printf("%d ", ref[j]);
3163
        }
3164
        printf("\n");*/
3165

3166
        for(j=0; j<16; j++){
3167
            int diff= FFABS(src[j] - ref[j]);
3168

3169
            error+= diff*diff;
3170
            max_error= FFMAX(max_error, diff);
3171
        }
3172
    }
3173
    printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
3174
    printf("testing quantizer\n");
3175
    for(qp=0; qp<52; qp++){
3176
        for(i=0; i<16; i++)
3177
            src1_block[i]= src2_block[i]= random()%255;
3178

3179
    }
3180
    printf("Testing NAL layer\n");
3181

3182
    uint8_t bitstream[COUNT];
3183
    uint8_t nal[COUNT*2];
3184
    H264Context h;
3185
    memset(&h, 0, sizeof(H264Context));
3186

3187
    for(i=0; i<COUNT; i++){
3188
        int zeros= i;
3189
        int nal_length;
3190
        int consumed;
3191
        int out_length;
3192
        uint8_t *out;
3193
        int j;
3194

3195
        for(j=0; j<COUNT; j++){
3196
            bitstream[j]= (random() % 255) + 1;
3197
        }
3198

3199
        for(j=0; j<zeros; j++){
3200
            int pos= random() % COUNT;
3201
            while(bitstream[pos] == 0){
3202
                pos++;
3203
                pos %= COUNT;
3204
            }
3205
            bitstream[pos]=0;
3206
        }
3207

3208
        START_TIMER
3209

3210
        nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
3211
        if(nal_length<0){
3212
            printf("encoding failed\n");
3213
            return -1;
3214
        }
3215

3216
        out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
3217

3218
        STOP_TIMER("NAL")
3219

3220
        if(out_length != COUNT){
3221
            printf("incorrect length %d %d\n", out_length, COUNT);
3222
            return -1;
3223
        }
3224

3225
        if(consumed != nal_length){
3226
            printf("incorrect consumed length %d %d\n", nal_length, consumed);
3227
            return -1;
3228
        }
3229

3230
        if(memcmp(bitstream, out, COUNT)){
3231
            printf("mismatch\n");
3232
            return -1;
3233
        }
3234
    }
3235
#endif
3236

    
3237
    printf("Testing RBSP\n");
3238

    
3239

    
3240
    return 0;
3241
}
3242
#endif /* TEST */
3243

    
3244

    
3245
av_cold void ff_h264_free_context(H264Context *h)
3246
{
3247
    int i;
3248

    
3249
    free_tables(h); //FIXME cleanup init stuff perhaps
3250

    
3251
    for(i = 0; i < MAX_SPS_COUNT; i++)
3252
        av_freep(h->sps_buffers + i);
3253

    
3254
    for(i = 0; i < MAX_PPS_COUNT; i++)
3255
        av_freep(h->pps_buffers + i);
3256
}
3257

    
3258
av_cold int ff_h264_decode_end(AVCodecContext *avctx)
3259
{
3260
    H264Context *h = avctx->priv_data;
3261
    MpegEncContext *s = &h->s;
3262

    
3263
    ff_h264_free_context(h);
3264

    
3265
    MPV_common_end(s);
3266

    
3267
//    memset(h, 0, sizeof(H264Context));
3268

    
3269
    return 0;
3270
}
3271

    
3272

    
3273
AVCodec h264_decoder = {
3274
    "h264",
3275
    AVMEDIA_TYPE_VIDEO,
3276
    CODEC_ID_H264,
3277
    sizeof(H264Context),
3278
    ff_h264_decode_init,
3279
    NULL,
3280
    ff_h264_decode_end,
3281
    decode_frame,
3282
    /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
3283
    .flush= flush_dpb,
3284
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
3285
};
3286

    
3287
#if CONFIG_H264_VDPAU_DECODER
3288
AVCodec h264_vdpau_decoder = {
3289
    "h264_vdpau",
3290
    AVMEDIA_TYPE_VIDEO,
3291
    CODEC_ID_H264,
3292
    sizeof(H264Context),
3293
    ff_h264_decode_init,
3294
    NULL,
3295
    ff_h264_decode_end,
3296
    decode_frame,
3297
    CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
3298
    .flush= flush_dpb,
3299
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
3300
    .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
3301
};
3302
#endif