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1
/*
2
 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
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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
20
 */
21

    
22
/**
23
 * @file
24
 * 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]={
49
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,
58
    PIX_FMT_VAAPI_VLD,
59
    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
/**
237
 * Identify the exact end of the bitstream
238
 * @return the length of the trailing, or 0 if damaged
239
 */
240
static int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
241
    int v= *src;
242
    int r;
243

    
244
    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
245

    
246
    for(r=1; r<9; r++){
247
        if(v&1) return r;
248
        v>>=1;
249
    }
250
    return 0;
251
}
252

    
253
#if 0
254
/**
255
 * DCT transforms the 16 dc values.
256
 * @param qp quantization parameter ??? FIXME
257
 */
258
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
259
//    const int qmul= dequant_coeff[qp][0];
260
    int i;
261
    int temp[16]; //FIXME check if this is a good idea
262
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
263
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
264

265
    for(i=0; i<4; i++){
266
        const int offset= y_offset[i];
267
        const int z0= block[offset+stride*0] + block[offset+stride*4];
268
        const int z1= block[offset+stride*0] - block[offset+stride*4];
269
        const int z2= block[offset+stride*1] - block[offset+stride*5];
270
        const int z3= block[offset+stride*1] + block[offset+stride*5];
271

272
        temp[4*i+0]= z0+z3;
273
        temp[4*i+1]= z1+z2;
274
        temp[4*i+2]= z1-z2;
275
        temp[4*i+3]= z0-z3;
276
    }
277

278
    for(i=0; i<4; i++){
279
        const int offset= x_offset[i];
280
        const int z0= temp[4*0+i] + temp[4*2+i];
281
        const int z1= temp[4*0+i] - temp[4*2+i];
282
        const int z2= temp[4*1+i] - temp[4*3+i];
283
        const int z3= temp[4*1+i] + temp[4*3+i];
284

285
        block[stride*0 +offset]= (z0 + z3)>>1;
286
        block[stride*2 +offset]= (z1 + z2)>>1;
287
        block[stride*8 +offset]= (z1 - z2)>>1;
288
        block[stride*10+offset]= (z0 - z3)>>1;
289
    }
290
}
291
#endif
292

    
293
#undef xStride
294
#undef stride
295

    
296
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qmul){
297
    const int stride= 16*2;
298
    const int xStride= 16;
299
    int a,b,c,d,e;
300

    
301
    a= block[stride*0 + xStride*0];
302
    b= block[stride*0 + xStride*1];
303
    c= block[stride*1 + xStride*0];
304
    d= block[stride*1 + xStride*1];
305

    
306
    e= a-b;
307
    a= a+b;
308
    b= c-d;
309
    c= c+d;
310

    
311
    block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
312
    block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
313
    block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
314
    block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
315
}
316

    
317
#if 0
318
static void chroma_dc_dct_c(DCTELEM *block){
319
    const int stride= 16*2;
320
    const int xStride= 16;
321
    int a,b,c,d,e;
322

323
    a= block[stride*0 + xStride*0];
324
    b= block[stride*0 + xStride*1];
325
    c= block[stride*1 + xStride*0];
326
    d= block[stride*1 + xStride*1];
327

328
    e= a-b;
329
    a= a+b;
330
    b= c-d;
331
    c= c+d;
332

333
    block[stride*0 + xStride*0]= (a+c);
334
    block[stride*0 + xStride*1]= (e+b);
335
    block[stride*1 + xStride*0]= (a-c);
336
    block[stride*1 + xStride*1]= (e-b);
337
}
338
#endif
339

    
340
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
341
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
342
                           int src_x_offset, int src_y_offset,
343
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
344
    MpegEncContext * const s = &h->s;
345
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
346
    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
347
    const int luma_xy= (mx&3) + ((my&3)<<2);
348
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
349
    uint8_t * src_cb, * src_cr;
350
    int extra_width= h->emu_edge_width;
351
    int extra_height= h->emu_edge_height;
352
    int emu=0;
353
    const int full_mx= mx>>2;
354
    const int full_my= my>>2;
355
    const int pic_width  = 16*s->mb_width;
356
    const int pic_height = 16*s->mb_height >> MB_FIELD;
357

    
358
    if(mx&7) extra_width -= 3;
359
    if(my&7) extra_height -= 3;
360

    
361
    if(   full_mx < 0-extra_width
362
       || full_my < 0-extra_height
363
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
364
       || full_my + 16/*FIXME*/ > pic_height + extra_height){
365
        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);
366
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
367
        emu=1;
368
    }
369

    
370
    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
371
    if(!square){
372
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
373
    }
374

    
375
    if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
376

    
377
    if(MB_FIELD){
378
        // chroma offset when predicting from a field of opposite parity
379
        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
380
        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
381
    }
382
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
383
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
384

    
385
    if(emu){
386
        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);
387
            src_cb= s->edge_emu_buffer;
388
    }
389
    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
390

    
391
    if(emu){
392
        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);
393
            src_cr= s->edge_emu_buffer;
394
    }
395
    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
396
}
397

    
398
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
399
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
400
                           int x_offset, int y_offset,
401
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
402
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
403
                           int list0, int list1){
404
    MpegEncContext * const s = &h->s;
405
    qpel_mc_func *qpix_op=  qpix_put;
406
    h264_chroma_mc_func chroma_op= chroma_put;
407

    
408
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
409
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
410
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
411
    x_offset += 8*s->mb_x;
412
    y_offset += 8*(s->mb_y >> MB_FIELD);
413

    
414
    if(list0){
415
        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
416
        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
417
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
418
                           qpix_op, chroma_op);
419

    
420
        qpix_op=  qpix_avg;
421
        chroma_op= chroma_avg;
422
    }
423

    
424
    if(list1){
425
        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
426
        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
427
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
428
                           qpix_op, chroma_op);
429
    }
430
}
431

    
432
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
433
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
434
                           int x_offset, int y_offset,
435
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
436
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
437
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
438
                           int list0, int list1){
439
    MpegEncContext * const s = &h->s;
440

    
441
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
442
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
443
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
444
    x_offset += 8*s->mb_x;
445
    y_offset += 8*(s->mb_y >> MB_FIELD);
446

    
447
    if(list0 && list1){
448
        /* don't optimize for luma-only case, since B-frames usually
449
         * use implicit weights => chroma too. */
450
        uint8_t *tmp_cb = s->obmc_scratchpad;
451
        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
452
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
453
        int refn0 = h->ref_cache[0][ scan8[n] ];
454
        int refn1 = h->ref_cache[1][ scan8[n] ];
455

    
456
        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
457
                    dest_y, dest_cb, dest_cr,
458
                    x_offset, y_offset, qpix_put, chroma_put);
459
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
460
                    tmp_y, tmp_cb, tmp_cr,
461
                    x_offset, y_offset, qpix_put, chroma_put);
462

    
463
        if(h->use_weight == 2){
464
            int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
465
            int weight1 = 64 - weight0;
466
            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
467
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
468
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
469
        }else{
470
            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
471
                            h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
472
                            h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
473
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
474
                            h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
475
                            h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
476
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
477
                            h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
478
                            h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
479
        }
480
    }else{
481
        int list = list1 ? 1 : 0;
482
        int refn = h->ref_cache[list][ scan8[n] ];
483
        Picture *ref= &h->ref_list[list][refn];
484
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
485
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
486
                    qpix_put, chroma_put);
487

    
488
        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
489
                       h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
490
        if(h->use_weight_chroma){
491
            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
492
                             h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
493
            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
494
                             h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
495
        }
496
    }
497
}
498

    
499
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
500
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
501
                           int x_offset, int y_offset,
502
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
503
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
504
                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
505
                           int list0, int list1){
506
    if((h->use_weight==2 && list0 && list1
507
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
508
       || h->use_weight==1)
509
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
510
                         x_offset, y_offset, qpix_put, chroma_put,
511
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
512
    else
513
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
514
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
515
}
516

    
517
static inline void prefetch_motion(H264Context *h, int list){
518
    /* fetch pixels for estimated mv 4 macroblocks ahead
519
     * optimized for 64byte cache lines */
520
    MpegEncContext * const s = &h->s;
521
    const int refn = h->ref_cache[list][scan8[0]];
522
    if(refn >= 0){
523
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
524
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
525
        uint8_t **src= h->ref_list[list][refn].data;
526
        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
527
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
528
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
529
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
530
    }
531
}
532

    
533
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
534
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
535
                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
536
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
537
    MpegEncContext * const s = &h->s;
538
    const int mb_xy= h->mb_xy;
539
    const int mb_type= s->current_picture.mb_type[mb_xy];
540

    
541
    assert(IS_INTER(mb_type));
542

    
543
    prefetch_motion(h, 0);
544

    
545
    if(IS_16X16(mb_type)){
546
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
547
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
548
                weight_op, weight_avg,
549
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
550
    }else if(IS_16X8(mb_type)){
551
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
552
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
553
                &weight_op[1], &weight_avg[1],
554
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
555
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
556
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
557
                &weight_op[1], &weight_avg[1],
558
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
559
    }else if(IS_8X16(mb_type)){
560
        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
561
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
562
                &weight_op[2], &weight_avg[2],
563
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
564
        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
565
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
566
                &weight_op[2], &weight_avg[2],
567
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
568
    }else{
569
        int i;
570

    
571
        assert(IS_8X8(mb_type));
572

    
573
        for(i=0; i<4; i++){
574
            const int sub_mb_type= h->sub_mb_type[i];
575
            const int n= 4*i;
576
            int x_offset= (i&1)<<2;
577
            int y_offset= (i&2)<<1;
578

    
579
            if(IS_SUB_8X8(sub_mb_type)){
580
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
581
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
582
                    &weight_op[3], &weight_avg[3],
583
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
584
            }else if(IS_SUB_8X4(sub_mb_type)){
585
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
586
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
587
                    &weight_op[4], &weight_avg[4],
588
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
589
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
590
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
591
                    &weight_op[4], &weight_avg[4],
592
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
593
            }else if(IS_SUB_4X8(sub_mb_type)){
594
                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
595
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
596
                    &weight_op[5], &weight_avg[5],
597
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
598
                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
599
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
600
                    &weight_op[5], &weight_avg[5],
601
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
602
            }else{
603
                int j;
604
                assert(IS_SUB_4X4(sub_mb_type));
605
                for(j=0; j<4; j++){
606
                    int sub_x_offset= x_offset + 2*(j&1);
607
                    int sub_y_offset= y_offset +   (j&2);
608
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
609
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
610
                        &weight_op[6], &weight_avg[6],
611
                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
612
                }
613
            }
614
        }
615
    }
616

    
617
    prefetch_motion(h, 1);
618
}
619

    
620

    
621
static void free_tables(H264Context *h, int free_rbsp){
622
    int i;
623
    H264Context *hx;
624
    av_freep(&h->intra4x4_pred_mode);
625
    av_freep(&h->chroma_pred_mode_table);
626
    av_freep(&h->cbp_table);
627
    av_freep(&h->mvd_table[0]);
628
    av_freep(&h->mvd_table[1]);
629
    av_freep(&h->direct_table);
630
    av_freep(&h->non_zero_count);
631
    av_freep(&h->slice_table_base);
632
    h->slice_table= NULL;
633
    av_freep(&h->list_counts);
634

    
635
    av_freep(&h->mb2b_xy);
636
    av_freep(&h->mb2br_xy);
637

    
638
    for(i = 0; i < MAX_THREADS; i++) {
639
        hx = h->thread_context[i];
640
        if(!hx) continue;
641
        av_freep(&hx->top_borders[1]);
642
        av_freep(&hx->top_borders[0]);
643
        av_freep(&hx->s.obmc_scratchpad);
644
        if (free_rbsp){
645
            av_freep(&hx->rbsp_buffer[1]);
646
            av_freep(&hx->rbsp_buffer[0]);
647
            hx->rbsp_buffer_size[0] = 0;
648
            hx->rbsp_buffer_size[1] = 0;
649
        }
650
        if (i) av_freep(&h->thread_context[i]);
651
    }
652
}
653

    
654
static void init_dequant8_coeff_table(H264Context *h){
655
    int i,q,x;
656
    h->dequant8_coeff[0] = h->dequant8_buffer[0];
657
    h->dequant8_coeff[1] = h->dequant8_buffer[1];
658

    
659
    for(i=0; i<2; i++ ){
660
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
661
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
662
            break;
663
        }
664

    
665
        for(q=0; q<52; q++){
666
            int shift = div6[q];
667
            int idx = rem6[q];
668
            for(x=0; x<64; x++)
669
                h->dequant8_coeff[i][q][(x>>3)|((x&7)<<3)] =
670
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
671
                    h->pps.scaling_matrix8[i][x]) << shift;
672
        }
673
    }
674
}
675

    
676
static void init_dequant4_coeff_table(H264Context *h){
677
    int i,j,q,x;
678
    for(i=0; i<6; i++ ){
679
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
680
        for(j=0; j<i; j++){
681
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
682
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
683
                break;
684
            }
685
        }
686
        if(j<i)
687
            continue;
688

    
689
        for(q=0; q<52; q++){
690
            int shift = div6[q] + 2;
691
            int idx = rem6[q];
692
            for(x=0; x<16; x++)
693
                h->dequant4_coeff[i][q][(x>>2)|((x<<2)&0xF)] =
694
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
695
                    h->pps.scaling_matrix4[i][x]) << shift;
696
        }
697
    }
698
}
699

    
700
static void init_dequant_tables(H264Context *h){
701
    int i,x;
702
    init_dequant4_coeff_table(h);
703
    if(h->pps.transform_8x8_mode)
704
        init_dequant8_coeff_table(h);
705
    if(h->sps.transform_bypass){
706
        for(i=0; i<6; i++)
707
            for(x=0; x<16; x++)
708
                h->dequant4_coeff[i][0][x] = 1<<6;
709
        if(h->pps.transform_8x8_mode)
710
            for(i=0; i<2; i++)
711
                for(x=0; x<64; x++)
712
                    h->dequant8_coeff[i][0][x] = 1<<6;
713
    }
714
}
715

    
716

    
717
int ff_h264_alloc_tables(H264Context *h){
718
    MpegEncContext * const s = &h->s;
719
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
720
    const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
721
    int x,y;
722

    
723
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
724

    
725
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 32 * sizeof(uint8_t), fail)
726
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
727
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
728

    
729
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
730
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
731
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
732
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
733
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
734

    
735
    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
736
    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
737

    
738
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
739
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
740
    for(y=0; y<s->mb_height; y++){
741
        for(x=0; x<s->mb_width; x++){
742
            const int mb_xy= x + y*s->mb_stride;
743
            const int b_xy = 4*x + 4*y*h->b_stride;
744

    
745
            h->mb2b_xy [mb_xy]= b_xy;
746
            h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
747
        }
748
    }
749

    
750
    s->obmc_scratchpad = NULL;
751

    
752
    if(!h->dequant4_coeff[0])
753
        init_dequant_tables(h);
754

    
755
    return 0;
756
fail:
757
    free_tables(h, 1);
758
    return -1;
759
}
760

    
761
/**
762
 * Mimic alloc_tables(), but for every context thread.
763
 */
764
static void clone_tables(H264Context *dst, H264Context *src, int i){
765
    MpegEncContext * const s = &src->s;
766
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
767
    dst->non_zero_count           = src->non_zero_count;
768
    dst->slice_table              = src->slice_table;
769
    dst->cbp_table                = src->cbp_table;
770
    dst->mb2b_xy                  = src->mb2b_xy;
771
    dst->mb2br_xy                 = src->mb2br_xy;
772
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
773
    dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
774
    dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
775
    dst->direct_table             = src->direct_table;
776
    dst->list_counts              = src->list_counts;
777

    
778
    dst->s.obmc_scratchpad = NULL;
779
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
780
}
781

    
782
/**
783
 * Init context
784
 * Allocate buffers which are not shared amongst multiple threads.
785
 */
786
static int context_init(H264Context *h){
787
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
788
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
789

    
790
    h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
791
    h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
792

    
793
    return 0;
794
fail:
795
    return -1; // free_tables will clean up for us
796
}
797

    
798
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
799

    
800
static av_cold void common_init(H264Context *h){
801
    MpegEncContext * const s = &h->s;
802

    
803
    s->width = s->avctx->width;
804
    s->height = s->avctx->height;
805
    s->codec_id= s->avctx->codec->id;
806

    
807
    ff_h264dsp_init(&h->h264dsp);
808
    ff_h264_pred_init(&h->hpc, s->codec_id);
809

    
810
    h->dequant_coeff_pps= -1;
811
    s->unrestricted_mv=1;
812
    s->decode=1; //FIXME
813

    
814
    dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
815

    
816
    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
817
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
818
}
819

    
820
int ff_h264_decode_extradata(H264Context *h)
821
{
822
    AVCodecContext *avctx = h->s.avctx;
823

    
824
    if(*(char *)avctx->extradata == 1){
825
        int i, cnt, nalsize;
826
        unsigned char *p = avctx->extradata;
827

    
828
        h->is_avc = 1;
829

    
830
        if(avctx->extradata_size < 7) {
831
            av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
832
            return -1;
833
        }
834
        /* sps and pps in the avcC always have length coded with 2 bytes,
835
           so put a fake nal_length_size = 2 while parsing them */
836
        h->nal_length_size = 2;
837
        // Decode sps from avcC
838
        cnt = *(p+5) & 0x1f; // Number of sps
839
        p += 6;
840
        for (i = 0; i < cnt; i++) {
841
            nalsize = AV_RB16(p) + 2;
842
            if(decode_nal_units(h, p, nalsize) < 0) {
843
                av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
844
                return -1;
845
            }
846
            p += nalsize;
847
        }
848
        // Decode pps from avcC
849
        cnt = *(p++); // Number of pps
850
        for (i = 0; i < cnt; i++) {
851
            nalsize = AV_RB16(p) + 2;
852
            if(decode_nal_units(h, p, nalsize)  != nalsize) {
853
                av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
854
                return -1;
855
            }
856
            p += nalsize;
857
        }
858
        // Now store right nal length size, that will be use to parse all other nals
859
        h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
860
    } else {
861
        h->is_avc = 0;
862
        if(decode_nal_units(h, avctx->extradata, avctx->extradata_size) < 0)
863
            return -1;
864
    }
865
    return 0;
866
}
867

    
868
av_cold int ff_h264_decode_init(AVCodecContext *avctx){
869
    H264Context *h= avctx->priv_data;
870
    MpegEncContext * const s = &h->s;
871

    
872
    MPV_decode_defaults(s);
873

    
874
    s->avctx = avctx;
875
    common_init(h);
876

    
877
    s->out_format = FMT_H264;
878
    s->workaround_bugs= avctx->workaround_bugs;
879

    
880
    // set defaults
881
//    s->decode_mb= ff_h263_decode_mb;
882
    s->quarter_sample = 1;
883
    if(!avctx->has_b_frames)
884
    s->low_delay= 1;
885

    
886
    avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
887

    
888
    ff_h264_decode_init_vlc();
889

    
890
    h->thread_context[0] = h;
891
    h->outputed_poc = INT_MIN;
892
    h->prev_poc_msb= 1<<16;
893
    h->x264_build = -1;
894
    ff_h264_reset_sei(h);
895
    if(avctx->codec_id == CODEC_ID_H264){
896
        if(avctx->ticks_per_frame == 1){
897
            s->avctx->time_base.den *=2;
898
        }
899
        avctx->ticks_per_frame = 2;
900
    }
901

    
902
    if(avctx->extradata_size > 0 && avctx->extradata &&
903
        ff_h264_decode_extradata(h))
904
        return -1;
905

    
906
    if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
907
        s->avctx->has_b_frames = h->sps.num_reorder_frames;
908
        s->low_delay = 0;
909
    }
910

    
911
    return 0;
912
}
913

    
914
int ff_h264_frame_start(H264Context *h){
915
    MpegEncContext * const s = &h->s;
916
    int i;
917

    
918
    if(MPV_frame_start(s, s->avctx) < 0)
919
        return -1;
920
    ff_er_frame_start(s);
921
    /*
922
     * MPV_frame_start uses pict_type to derive key_frame.
923
     * This is incorrect for H.264; IDR markings must be used.
924
     * Zero here; IDR markings per slice in frame or fields are ORed in later.
925
     * See decode_nal_units().
926
     */
927
    s->current_picture_ptr->key_frame= 0;
928
    s->current_picture_ptr->mmco_reset= 0;
929

    
930
    assert(s->linesize && s->uvlinesize);
931

    
932
    for(i=0; i<16; i++){
933
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
934
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
935
    }
936
    for(i=0; i<4; i++){
937
        h->block_offset[16+i]=
938
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
939
        h->block_offset[24+16+i]=
940
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
941
    }
942

    
943
    /* can't be in alloc_tables because linesize isn't known there.
944
     * FIXME: redo bipred weight to not require extra buffer? */
945
    for(i = 0; i < s->avctx->thread_count; i++)
946
        if(h->thread_context[i] && !h->thread_context[i]->s.obmc_scratchpad)
947
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
948

    
949
    /* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
950
    memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
951

    
952
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
953

    
954
    // We mark the current picture as non-reference after allocating it, so
955
    // that if we break out due to an error it can be released automatically
956
    // in the next MPV_frame_start().
957
    // SVQ3 as well as most other codecs have only last/next/current and thus
958
    // get released even with set reference, besides SVQ3 and others do not
959
    // mark frames as reference later "naturally".
960
    if(s->codec_id != CODEC_ID_SVQ3)
961
        s->current_picture_ptr->reference= 0;
962

    
963
    s->current_picture_ptr->field_poc[0]=
964
    s->current_picture_ptr->field_poc[1]= INT_MAX;
965
    assert(s->current_picture_ptr->long_ref==0);
966

    
967
    return 0;
968
}
969

    
970
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){
971
    MpegEncContext * const s = &h->s;
972
    uint8_t *top_border;
973
    int top_idx = 1;
974

    
975
    src_y  -=   linesize;
976
    src_cb -= uvlinesize;
977
    src_cr -= uvlinesize;
978

    
979
    if(!simple && FRAME_MBAFF){
980
        if(s->mb_y&1){
981
            if(!MB_MBAFF){
982
                top_border = h->top_borders[0][s->mb_x];
983
                AV_COPY128(top_border, src_y + 15*linesize);
984
                if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
985
                    AV_COPY64(top_border+16, src_cb+7*uvlinesize);
986
                    AV_COPY64(top_border+24, src_cr+7*uvlinesize);
987
                }
988
            }
989
        }else if(MB_MBAFF){
990
            top_idx = 0;
991
        }else
992
            return;
993
    }
994

    
995
    top_border = h->top_borders[top_idx][s->mb_x];
996
    // There are two lines saved, the line above the the top macroblock of a pair,
997
    // and the line above the bottom macroblock
998
    AV_COPY128(top_border, src_y + 16*linesize);
999

    
1000
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1001
        AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1002
        AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1003
    }
1004
}
1005

    
1006
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){
1007
    MpegEncContext * const s = &h->s;
1008
    int deblock_left;
1009
    int deblock_top;
1010
    int top_idx = 1;
1011
    uint8_t *top_border_m1;
1012
    uint8_t *top_border;
1013

    
1014
    if(!simple && FRAME_MBAFF){
1015
        if(s->mb_y&1){
1016
            if(!MB_MBAFF)
1017
                return;
1018
        }else{
1019
            top_idx = MB_MBAFF ? 0 : 1;
1020
        }
1021
    }
1022

    
1023
    if(h->deblocking_filter == 2) {
1024
        deblock_left = h->left_type[0];
1025
        deblock_top  = h->top_type;
1026
    } else {
1027
        deblock_left = (s->mb_x > 0);
1028
        deblock_top =  (s->mb_y > !!MB_FIELD);
1029
    }
1030

    
1031
    src_y  -=   linesize + 1;
1032
    src_cb -= uvlinesize + 1;
1033
    src_cr -= uvlinesize + 1;
1034

    
1035
    top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1036
    top_border    = h->top_borders[top_idx][s->mb_x];
1037

    
1038
#define XCHG(a,b,xchg)\
1039
if (xchg) AV_SWAP64(b,a);\
1040
else      AV_COPY64(b,a);
1041

    
1042
    if(deblock_top){
1043
        if(deblock_left){
1044
            XCHG(top_border_m1+8, src_y -7, 1);
1045
        }
1046
        XCHG(top_border+0, src_y +1, xchg);
1047
        XCHG(top_border+8, src_y +9, 1);
1048
        if(s->mb_x+1 < s->mb_width){
1049
            XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
1050
        }
1051
    }
1052

    
1053
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1054
        if(deblock_top){
1055
            if(deblock_left){
1056
                XCHG(top_border_m1+16, src_cb -7, 1);
1057
                XCHG(top_border_m1+24, src_cr -7, 1);
1058
            }
1059
            XCHG(top_border+16, src_cb+1, 1);
1060
            XCHG(top_border+24, src_cr+1, 1);
1061
        }
1062
    }
1063
}
1064

    
1065
static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
1066
    MpegEncContext * const s = &h->s;
1067
    const int mb_x= s->mb_x;
1068
    const int mb_y= s->mb_y;
1069
    const int mb_xy= h->mb_xy;
1070
    const int mb_type= s->current_picture.mb_type[mb_xy];
1071
    uint8_t  *dest_y, *dest_cb, *dest_cr;
1072
    int linesize, uvlinesize /*dct_offset*/;
1073
    int i;
1074
    int *block_offset = &h->block_offset[0];
1075
    const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1076
    /* is_h264 should always be true if SVQ3 is disabled. */
1077
    const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1078
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1079
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1080

    
1081
    dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
1082
    dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
1083
    dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
1084

    
1085
    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1086
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
1087

    
1088
    h->list_counts[mb_xy]= h->list_count;
1089

    
1090
    if (!simple && MB_FIELD) {
1091
        linesize   = h->mb_linesize   = s->linesize * 2;
1092
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1093
        block_offset = &h->block_offset[24];
1094
        if(mb_y&1){ //FIXME move out of this function?
1095
            dest_y -= s->linesize*15;
1096
            dest_cb-= s->uvlinesize*7;
1097
            dest_cr-= s->uvlinesize*7;
1098
        }
1099
        if(FRAME_MBAFF) {
1100
            int list;
1101
            for(list=0; list<h->list_count; list++){
1102
                if(!USES_LIST(mb_type, list))
1103
                    continue;
1104
                if(IS_16X16(mb_type)){
1105
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
1106
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1107
                }else{
1108
                    for(i=0; i<16; i+=4){
1109
                        int ref = h->ref_cache[list][scan8[i]];
1110
                        if(ref >= 0)
1111
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1112
                    }
1113
                }
1114
            }
1115
        }
1116
    } else {
1117
        linesize   = h->mb_linesize   = s->linesize;
1118
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1119
//        dct_offset = s->linesize * 16;
1120
    }
1121

    
1122
    if (!simple && IS_INTRA_PCM(mb_type)) {
1123
        for (i=0; i<16; i++) {
1124
            memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1125
        }
1126
        for (i=0; i<8; i++) {
1127
            memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1128
            memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1129
        }
1130
    } else {
1131
        if(IS_INTRA(mb_type)){
1132
            if(h->deblocking_filter)
1133
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1134

    
1135
            if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1136
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1137
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1138
            }
1139

    
1140
            if(IS_INTRA4x4(mb_type)){
1141
                if(simple || !s->encoding){
1142
                    if(IS_8x8DCT(mb_type)){
1143
                        if(transform_bypass){
1144
                            idct_dc_add =
1145
                            idct_add    = s->dsp.add_pixels8;
1146
                        }else{
1147
                            idct_dc_add = h->h264dsp.h264_idct8_dc_add;
1148
                            idct_add    = h->h264dsp.h264_idct8_add;
1149
                        }
1150
                        for(i=0; i<16; i+=4){
1151
                            uint8_t * const ptr= dest_y + block_offset[i];
1152
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1153
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1154
                                h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1155
                            }else{
1156
                                const int nnz = h->non_zero_count_cache[ scan8[i] ];
1157
                                h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1158
                                                            (h->topright_samples_available<<i)&0x4000, linesize);
1159
                                if(nnz){
1160
                                    if(nnz == 1 && h->mb[i*16])
1161
                                        idct_dc_add(ptr, h->mb + i*16, linesize);
1162
                                    else
1163
                                        idct_add   (ptr, h->mb + i*16, linesize);
1164
                                }
1165
                            }
1166
                        }
1167
                    }else{
1168
                        if(transform_bypass){
1169
                            idct_dc_add =
1170
                            idct_add    = s->dsp.add_pixels4;
1171
                        }else{
1172
                            idct_dc_add = h->h264dsp.h264_idct_dc_add;
1173
                            idct_add    = h->h264dsp.h264_idct_add;
1174
                        }
1175
                        for(i=0; i<16; i++){
1176
                            uint8_t * const ptr= dest_y + block_offset[i];
1177
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1178

    
1179
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1180
                                h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1181
                            }else{
1182
                                uint8_t *topright;
1183
                                int nnz, tr;
1184
                                if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1185
                                    const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1186
                                    assert(mb_y || linesize <= block_offset[i]);
1187
                                    if(!topright_avail){
1188
                                        tr= ptr[3 - linesize]*0x01010101;
1189
                                        topright= (uint8_t*) &tr;
1190
                                    }else
1191
                                        topright= ptr + 4 - linesize;
1192
                                }else
1193
                                    topright= NULL;
1194

    
1195
                                h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1196
                                nnz = h->non_zero_count_cache[ scan8[i] ];
1197
                                if(nnz){
1198
                                    if(is_h264){
1199
                                        if(nnz == 1 && h->mb[i*16])
1200
                                            idct_dc_add(ptr, h->mb + i*16, linesize);
1201
                                        else
1202
                                            idct_add   (ptr, h->mb + i*16, linesize);
1203
                                    }else
1204
                                        ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1205
                                }
1206
                            }
1207
                        }
1208
                    }
1209
                }
1210
            }else{
1211
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1212
                if(is_h264){
1213
                    if(h->non_zero_count_cache[ scan8[LUMA_DC_BLOCK_INDEX] ]){
1214
                        if(!transform_bypass)
1215
                            h->h264dsp.h264_luma_dc_dequant_idct(h->mb, h->mb_luma_dc, h->dequant4_coeff[0][s->qscale][0]);
1216
                        else{
1217
                            static const uint8_t dc_mapping[16] = { 0*16, 1*16, 4*16, 5*16, 2*16, 3*16, 6*16, 7*16,
1218
                                                                    8*16, 9*16,12*16,13*16,10*16,11*16,14*16,15*16};
1219
                            for(i = 0; i < 16; i++)
1220
                                h->mb[dc_mapping[i]] = h->mb_luma_dc[i];
1221
                        }
1222
                    }
1223
                }else
1224
                    ff_svq3_luma_dc_dequant_idct_c(h->mb, h->mb_luma_dc, s->qscale);
1225
            }
1226
            if(h->deblocking_filter)
1227
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1228
        }else if(is_h264){
1229
            hl_motion(h, dest_y, dest_cb, dest_cr,
1230
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1231
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1232
                      h->h264dsp.weight_h264_pixels_tab, h->h264dsp.biweight_h264_pixels_tab);
1233
        }
1234

    
1235

    
1236
        if(!IS_INTRA4x4(mb_type)){
1237
            if(is_h264){
1238
                if(IS_INTRA16x16(mb_type)){
1239
                    if(transform_bypass){
1240
                        if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1241
                            h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1242
                        }else{
1243
                            for(i=0; i<16; i++){
1244
                                if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1245
                                    s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1246
                            }
1247
                        }
1248
                    }else{
1249
                         h->h264dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1250
                    }
1251
                }else if(h->cbp&15){
1252
                    if(transform_bypass){
1253
                        const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1254
                        idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1255
                        for(i=0; i<16; i+=di){
1256
                            if(h->non_zero_count_cache[ scan8[i] ]){
1257
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1258
                            }
1259
                        }
1260
                    }else{
1261
                        if(IS_8x8DCT(mb_type)){
1262
                            h->h264dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1263
                        }else{
1264
                            h->h264dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1265
                        }
1266
                    }
1267
                }
1268
            }else{
1269
                for(i=0; i<16; i++){
1270
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1271
                        uint8_t * const ptr= dest_y + block_offset[i];
1272
                        ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1273
                    }
1274
                }
1275
            }
1276
        }
1277

    
1278
        if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1279
            uint8_t *dest[2] = {dest_cb, dest_cr};
1280
            if(transform_bypass){
1281
                if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1282
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1283
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1284
                }else{
1285
                    idct_add = s->dsp.add_pixels4;
1286
                    for(i=16; i<16+8; i++){
1287
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1288
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1289
                    }
1290
                }
1291
            }else{
1292
                if(is_h264){
1293
                    if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+0] ])
1294
                        chroma_dc_dequant_idct_c(h->mb + 16*16     , h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
1295
                    if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+1] ])
1296
                        chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
1297
                    h->h264dsp.h264_idct_add8(dest, block_offset,
1298
                                              h->mb, uvlinesize,
1299
                                              h->non_zero_count_cache);
1300
                }else{
1301
                    chroma_dc_dequant_idct_c(h->mb + 16*16     , h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
1302
                    chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
1303
                    for(i=16; i<16+8; i++){
1304
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1305
                            uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1306
                            ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1307
                        }
1308
                    }
1309
                }
1310
            }
1311
        }
1312
    }
1313
    if(h->cbp || IS_INTRA(mb_type))
1314
        s->dsp.clear_blocks(h->mb);
1315
}
1316

    
1317
/**
1318
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
1319
 */
1320
static void hl_decode_mb_simple(H264Context *h){
1321
    hl_decode_mb_internal(h, 1);
1322
}
1323

    
1324
/**
1325
 * Process a macroblock; this handles edge cases, such as interlacing.
1326
 */
1327
static void av_noinline hl_decode_mb_complex(H264Context *h){
1328
    hl_decode_mb_internal(h, 0);
1329
}
1330

    
1331
void ff_h264_hl_decode_mb(H264Context *h){
1332
    MpegEncContext * const s = &h->s;
1333
    const int mb_xy= h->mb_xy;
1334
    const int mb_type= s->current_picture.mb_type[mb_xy];
1335
    int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1336

    
1337
    if (is_complex)
1338
        hl_decode_mb_complex(h);
1339
    else hl_decode_mb_simple(h);
1340
}
1341

    
1342
static int pred_weight_table(H264Context *h){
1343
    MpegEncContext * const s = &h->s;
1344
    int list, i;
1345
    int luma_def, chroma_def;
1346

    
1347
    h->use_weight= 0;
1348
    h->use_weight_chroma= 0;
1349
    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1350
    if(CHROMA)
1351
        h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1352
    luma_def = 1<<h->luma_log2_weight_denom;
1353
    chroma_def = 1<<h->chroma_log2_weight_denom;
1354

    
1355
    for(list=0; list<2; list++){
1356
        h->luma_weight_flag[list]   = 0;
1357
        h->chroma_weight_flag[list] = 0;
1358
        for(i=0; i<h->ref_count[list]; i++){
1359
            int luma_weight_flag, chroma_weight_flag;
1360

    
1361
            luma_weight_flag= get_bits1(&s->gb);
1362
            if(luma_weight_flag){
1363
                h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
1364
                h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
1365
                if(   h->luma_weight[i][list][0] != luma_def
1366
                   || h->luma_weight[i][list][1] != 0) {
1367
                    h->use_weight= 1;
1368
                    h->luma_weight_flag[list]= 1;
1369
                }
1370
            }else{
1371
                h->luma_weight[i][list][0]= luma_def;
1372
                h->luma_weight[i][list][1]= 0;
1373
            }
1374

    
1375
            if(CHROMA){
1376
                chroma_weight_flag= get_bits1(&s->gb);
1377
                if(chroma_weight_flag){
1378
                    int j;
1379
                    for(j=0; j<2; j++){
1380
                        h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
1381
                        h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
1382
                        if(   h->chroma_weight[i][list][j][0] != chroma_def
1383
                           || h->chroma_weight[i][list][j][1] != 0) {
1384
                            h->use_weight_chroma= 1;
1385
                            h->chroma_weight_flag[list]= 1;
1386
                        }
1387
                    }
1388
                }else{
1389
                    int j;
1390
                    for(j=0; j<2; j++){
1391
                        h->chroma_weight[i][list][j][0]= chroma_def;
1392
                        h->chroma_weight[i][list][j][1]= 0;
1393
                    }
1394
                }
1395
            }
1396
        }
1397
        if(h->slice_type_nos != FF_B_TYPE) break;
1398
    }
1399
    h->use_weight= h->use_weight || h->use_weight_chroma;
1400
    return 0;
1401
}
1402

    
1403
/**
1404
 * Initialize implicit_weight table.
1405
 * @param field  0/1 initialize the weight for interlaced MBAFF
1406
 *                -1 initializes the rest
1407
 */
1408
static void implicit_weight_table(H264Context *h, int field){
1409
    MpegEncContext * const s = &h->s;
1410
    int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
1411

    
1412
    for (i = 0; i < 2; i++) {
1413
        h->luma_weight_flag[i]   = 0;
1414
        h->chroma_weight_flag[i] = 0;
1415
    }
1416

    
1417
    if(field < 0){
1418
        cur_poc = s->current_picture_ptr->poc;
1419
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF
1420
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1421
        h->use_weight= 0;
1422
        h->use_weight_chroma= 0;
1423
        return;
1424
    }
1425
        ref_start= 0;
1426
        ref_count0= h->ref_count[0];
1427
        ref_count1= h->ref_count[1];
1428
    }else{
1429
        cur_poc = s->current_picture_ptr->field_poc[field];
1430
        ref_start= 16;
1431
        ref_count0= 16+2*h->ref_count[0];
1432
        ref_count1= 16+2*h->ref_count[1];
1433
    }
1434

    
1435
    h->use_weight= 2;
1436
    h->use_weight_chroma= 2;
1437
    h->luma_log2_weight_denom= 5;
1438
    h->chroma_log2_weight_denom= 5;
1439

    
1440
    for(ref0=ref_start; ref0 < ref_count0; ref0++){
1441
        int poc0 = h->ref_list[0][ref0].poc;
1442
        for(ref1=ref_start; ref1 < ref_count1; ref1++){
1443
            int poc1 = h->ref_list[1][ref1].poc;
1444
            int td = av_clip(poc1 - poc0, -128, 127);
1445
            int w= 32;
1446
            if(td){
1447
                int tb = av_clip(cur_poc - poc0, -128, 127);
1448
                int tx = (16384 + (FFABS(td) >> 1)) / td;
1449
                int dist_scale_factor = (tb*tx + 32) >> 8;
1450
                if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
1451
                    w = 64 - dist_scale_factor;
1452
            }
1453
            if(field<0){
1454
                h->implicit_weight[ref0][ref1][0]=
1455
                h->implicit_weight[ref0][ref1][1]= w;
1456
            }else{
1457
                h->implicit_weight[ref0][ref1][field]=w;
1458
            }
1459
        }
1460
    }
1461
}
1462

    
1463
/**
1464
 * instantaneous decoder refresh.
1465
 */
1466
static void idr(H264Context *h){
1467
    ff_h264_remove_all_refs(h);
1468
    h->prev_frame_num= 0;
1469
    h->prev_frame_num_offset= 0;
1470
    h->prev_poc_msb=
1471
    h->prev_poc_lsb= 0;
1472
}
1473

    
1474
/* forget old pics after a seek */
1475
static void flush_dpb(AVCodecContext *avctx){
1476
    H264Context *h= avctx->priv_data;
1477
    int i;
1478
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1479
        if(h->delayed_pic[i])
1480
            h->delayed_pic[i]->reference= 0;
1481
        h->delayed_pic[i]= NULL;
1482
    }
1483
    h->outputed_poc= INT_MIN;
1484
    h->prev_interlaced_frame = 1;
1485
    idr(h);
1486
    if(h->s.current_picture_ptr)
1487
        h->s.current_picture_ptr->reference= 0;
1488
    h->s.first_field= 0;
1489
    ff_h264_reset_sei(h);
1490
    ff_mpeg_flush(avctx);
1491
}
1492

    
1493
static int init_poc(H264Context *h){
1494
    MpegEncContext * const s = &h->s;
1495
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1496
    int field_poc[2];
1497
    Picture *cur = s->current_picture_ptr;
1498

    
1499
    h->frame_num_offset= h->prev_frame_num_offset;
1500
    if(h->frame_num < h->prev_frame_num)
1501
        h->frame_num_offset += max_frame_num;
1502

    
1503
    if(h->sps.poc_type==0){
1504
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1505

    
1506
        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1507
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1508
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1509
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1510
        else
1511
            h->poc_msb = h->prev_poc_msb;
1512
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1513
        field_poc[0] =
1514
        field_poc[1] = h->poc_msb + h->poc_lsb;
1515
        if(s->picture_structure == PICT_FRAME)
1516
            field_poc[1] += h->delta_poc_bottom;
1517
    }else if(h->sps.poc_type==1){
1518
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1519
        int i;
1520

    
1521
        if(h->sps.poc_cycle_length != 0)
1522
            abs_frame_num = h->frame_num_offset + h->frame_num;
1523
        else
1524
            abs_frame_num = 0;
1525

    
1526
        if(h->nal_ref_idc==0 && abs_frame_num > 0)
1527
            abs_frame_num--;
1528

    
1529
        expected_delta_per_poc_cycle = 0;
1530
        for(i=0; i < h->sps.poc_cycle_length; i++)
1531
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1532

    
1533
        if(abs_frame_num > 0){
1534
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1535
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1536

    
1537
            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1538
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
1539
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1540
        } else
1541
            expectedpoc = 0;
1542

    
1543
        if(h->nal_ref_idc == 0)
1544
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1545

    
1546
        field_poc[0] = expectedpoc + h->delta_poc[0];
1547
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1548

    
1549
        if(s->picture_structure == PICT_FRAME)
1550
            field_poc[1] += h->delta_poc[1];
1551
    }else{
1552
        int poc= 2*(h->frame_num_offset + h->frame_num);
1553

    
1554
        if(!h->nal_ref_idc)
1555
            poc--;
1556

    
1557
        field_poc[0]= poc;
1558
        field_poc[1]= poc;
1559
    }
1560

    
1561
    if(s->picture_structure != PICT_BOTTOM_FIELD)
1562
        s->current_picture_ptr->field_poc[0]= field_poc[0];
1563
    if(s->picture_structure != PICT_TOP_FIELD)
1564
        s->current_picture_ptr->field_poc[1]= field_poc[1];
1565
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1566

    
1567
    return 0;
1568
}
1569

    
1570

    
1571
/**
1572
 * initialize scan tables
1573
 */
1574
static void init_scan_tables(H264Context *h){
1575
    int i;
1576
    for(i=0; i<16; i++){
1577
#define T(x) (x>>2) | ((x<<2) & 0xF)
1578
        h->zigzag_scan[i] = T(zigzag_scan[i]);
1579
        h-> field_scan[i] = T( field_scan[i]);
1580
#undef T
1581
    }
1582
    for(i=0; i<64; i++){
1583
#define T(x) (x>>3) | ((x&7)<<3)
1584
        h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
1585
        h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1586
        h->field_scan8x8[i]        = T(field_scan8x8[i]);
1587
        h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
1588
#undef T
1589
    }
1590
    if(h->sps.transform_bypass){ //FIXME same ugly
1591
        h->zigzag_scan_q0          = zigzag_scan;
1592
        h->zigzag_scan8x8_q0       = ff_zigzag_direct;
1593
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1594
        h->field_scan_q0           = field_scan;
1595
        h->field_scan8x8_q0        = field_scan8x8;
1596
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
1597
    }else{
1598
        h->zigzag_scan_q0          = h->zigzag_scan;
1599
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
1600
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1601
        h->field_scan_q0           = h->field_scan;
1602
        h->field_scan8x8_q0        = h->field_scan8x8;
1603
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
1604
    }
1605
}
1606

    
1607
static void field_end(H264Context *h){
1608
    MpegEncContext * const s = &h->s;
1609
    AVCodecContext * const avctx= s->avctx;
1610
    s->mb_y= 0;
1611

    
1612
    s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1613
    s->current_picture_ptr->pict_type= s->pict_type;
1614

    
1615
    if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1616
        ff_vdpau_h264_set_reference_frames(s);
1617

    
1618
    if(!s->dropable) {
1619
        ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1620
        h->prev_poc_msb= h->poc_msb;
1621
        h->prev_poc_lsb= h->poc_lsb;
1622
    }
1623
    h->prev_frame_num_offset= h->frame_num_offset;
1624
    h->prev_frame_num= h->frame_num;
1625

    
1626
    if (avctx->hwaccel) {
1627
        if (avctx->hwaccel->end_frame(avctx) < 0)
1628
            av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1629
    }
1630

    
1631
    if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1632
        ff_vdpau_h264_picture_complete(s);
1633

    
1634
    /*
1635
     * FIXME: Error handling code does not seem to support interlaced
1636
     * when slices span multiple rows
1637
     * The ff_er_add_slice calls don't work right for bottom
1638
     * fields; they cause massive erroneous error concealing
1639
     * Error marking covers both fields (top and bottom).
1640
     * This causes a mismatched s->error_count
1641
     * and a bad error table. Further, the error count goes to
1642
     * INT_MAX when called for bottom field, because mb_y is
1643
     * past end by one (callers fault) and resync_mb_y != 0
1644
     * causes problems for the first MB line, too.
1645
     */
1646
    if (!FIELD_PICTURE)
1647
        ff_er_frame_end(s);
1648

    
1649
    MPV_frame_end(s);
1650

    
1651
    h->current_slice=0;
1652
}
1653

    
1654
/**
1655
 * Replicate H264 "master" context to thread contexts.
1656
 */
1657
static void clone_slice(H264Context *dst, H264Context *src)
1658
{
1659
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
1660
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
1661
    dst->s.current_picture      = src->s.current_picture;
1662
    dst->s.linesize             = src->s.linesize;
1663
    dst->s.uvlinesize           = src->s.uvlinesize;
1664
    dst->s.first_field          = src->s.first_field;
1665

    
1666
    dst->prev_poc_msb           = src->prev_poc_msb;
1667
    dst->prev_poc_lsb           = src->prev_poc_lsb;
1668
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
1669
    dst->prev_frame_num         = src->prev_frame_num;
1670
    dst->short_ref_count        = src->short_ref_count;
1671

    
1672
    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
1673
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
1674
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1675
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
1676

    
1677
    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
1678
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
1679
}
1680

    
1681
/**
1682
 * decodes a slice header.
1683
 * This will also call MPV_common_init() and frame_start() as needed.
1684
 *
1685
 * @param h h264context
1686
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1687
 *
1688
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1689
 */
1690
static int decode_slice_header(H264Context *h, H264Context *h0){
1691
    MpegEncContext * const s = &h->s;
1692
    MpegEncContext * const s0 = &h0->s;
1693
    unsigned int first_mb_in_slice;
1694
    unsigned int pps_id;
1695
    int num_ref_idx_active_override_flag;
1696
    unsigned int slice_type, tmp, i, j;
1697
    int default_ref_list_done = 0;
1698
    int last_pic_structure;
1699

    
1700
    s->dropable= h->nal_ref_idc == 0;
1701

    
1702
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1703
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1704
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1705
    }else{
1706
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1707
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1708
    }
1709

    
1710
    first_mb_in_slice= get_ue_golomb(&s->gb);
1711

    
1712
    if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1713
        if(h0->current_slice && FIELD_PICTURE){
1714
            field_end(h);
1715
        }
1716

    
1717
        h0->current_slice = 0;
1718
        if (!s0->first_field)
1719
            s->current_picture_ptr= NULL;
1720
    }
1721

    
1722
    slice_type= get_ue_golomb_31(&s->gb);
1723
    if(slice_type > 9){
1724
        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);
1725
        return -1;
1726
    }
1727
    if(slice_type > 4){
1728
        slice_type -= 5;
1729
        h->slice_type_fixed=1;
1730
    }else
1731
        h->slice_type_fixed=0;
1732

    
1733
    slice_type= golomb_to_pict_type[ slice_type ];
1734
    if (slice_type == FF_I_TYPE
1735
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1736
        default_ref_list_done = 1;
1737
    }
1738
    h->slice_type= slice_type;
1739
    h->slice_type_nos= slice_type & 3;
1740

    
1741
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1742

    
1743
    pps_id= get_ue_golomb(&s->gb);
1744
    if(pps_id>=MAX_PPS_COUNT){
1745
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1746
        return -1;
1747
    }
1748
    if(!h0->pps_buffers[pps_id]) {
1749
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1750
        return -1;
1751
    }
1752
    h->pps= *h0->pps_buffers[pps_id];
1753

    
1754
    if(!h0->sps_buffers[h->pps.sps_id]) {
1755
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1756
        return -1;
1757
    }
1758
    h->sps = *h0->sps_buffers[h->pps.sps_id];
1759

    
1760
    s->avctx->profile = h->sps.profile_idc;
1761
    s->avctx->level   = h->sps.level_idc;
1762
    s->avctx->refs    = h->sps.ref_frame_count;
1763

    
1764
    if(h == h0 && h->dequant_coeff_pps != pps_id){
1765
        h->dequant_coeff_pps = pps_id;
1766
        init_dequant_tables(h);
1767
    }
1768

    
1769
    s->mb_width= h->sps.mb_width;
1770
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1771

    
1772
    h->b_stride=  s->mb_width*4;
1773

    
1774
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1775
    if(h->sps.frame_mbs_only_flag)
1776
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1777
    else
1778
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 7);
1779

    
1780
    if (s->context_initialized
1781
        && (   s->width != s->avctx->width || s->height != s->avctx->height
1782
            || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
1783
        if(h != h0)
1784
            return -1;   // width / height changed during parallelized decoding
1785
        free_tables(h, 0);
1786
        flush_dpb(s->avctx);
1787
        MPV_common_end(s);
1788
    }
1789
    if (!s->context_initialized) {
1790
        if(h != h0)
1791
            return -1;  // we cant (re-)initialize context during parallel decoding
1792

    
1793
        avcodec_set_dimensions(s->avctx, s->width, s->height);
1794
        s->avctx->sample_aspect_ratio= h->sps.sar;
1795
        av_assert0(s->avctx->sample_aspect_ratio.den);
1796

    
1797
        if(h->sps.video_signal_type_present_flag){
1798
            s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1799
            if(h->sps.colour_description_present_flag){
1800
                s->avctx->color_primaries = h->sps.color_primaries;
1801
                s->avctx->color_trc       = h->sps.color_trc;
1802
                s->avctx->colorspace      = h->sps.colorspace;
1803
            }
1804
        }
1805

    
1806
        if(h->sps.timing_info_present_flag){
1807
            int64_t den= h->sps.time_scale;
1808
            if(h->x264_build < 44U)
1809
                den *= 2;
1810
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1811
                      h->sps.num_units_in_tick, den, 1<<30);
1812
        }
1813
        s->avctx->pix_fmt = s->avctx->get_format(s->avctx,
1814
                                                 s->avctx->codec->pix_fmts ?
1815
                                                 s->avctx->codec->pix_fmts :
1816
                                                 s->avctx->color_range == AVCOL_RANGE_JPEG ?
1817
                                                 hwaccel_pixfmt_list_h264_jpeg_420 :
1818
                                                 ff_hwaccel_pixfmt_list_420);
1819
        s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1820

    
1821
        if (MPV_common_init(s) < 0)
1822
            return -1;
1823
        s->first_field = 0;
1824
        h->prev_interlaced_frame = 1;
1825

    
1826
        init_scan_tables(h);
1827
        ff_h264_alloc_tables(h);
1828

    
1829
        for(i = 1; i < s->avctx->thread_count; i++) {
1830
            H264Context *c;
1831
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1832
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1833
            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1834
            c->h264dsp = h->h264dsp;
1835
            c->sps = h->sps;
1836
            c->pps = h->pps;
1837
            init_scan_tables(c);
1838
            clone_tables(c, h, i);
1839
        }
1840

    
1841
        for(i = 0; i < s->avctx->thread_count; i++)
1842
            if(context_init(h->thread_context[i]) < 0)
1843
                return -1;
1844
    }
1845

    
1846
    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1847

    
1848
    h->mb_mbaff = 0;
1849
    h->mb_aff_frame = 0;
1850
    last_pic_structure = s0->picture_structure;
1851
    if(h->sps.frame_mbs_only_flag){
1852
        s->picture_structure= PICT_FRAME;
1853
    }else{
1854
        if(get_bits1(&s->gb)) { //field_pic_flag
1855
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1856
        } else {
1857
            s->picture_structure= PICT_FRAME;
1858
            h->mb_aff_frame = h->sps.mb_aff;
1859
        }
1860
    }
1861
    h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1862

    
1863
    if(h0->current_slice == 0){
1864
        while(h->frame_num !=  h->prev_frame_num &&
1865
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1866
            Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1867
            av_log(h->s.avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1868
            if (ff_h264_frame_start(h) < 0)
1869
                return -1;
1870
            h->prev_frame_num++;
1871
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1872
            s->current_picture_ptr->frame_num= h->prev_frame_num;
1873
            ff_generate_sliding_window_mmcos(h);
1874
            ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1875
            /* Error concealment: if a ref is missing, copy the previous ref in its place.
1876
             * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
1877
             * about there being no actual duplicates.
1878
             * FIXME: this doesn't copy padding for out-of-frame motion vectors.  Given we're
1879
             * concealing a lost frame, this probably isn't noticable by comparison, but it should
1880
             * be fixed. */
1881
            if (h->short_ref_count) {
1882
                if (prev) {
1883
                    av_image_copy(h->short_ref[0]->data, h->short_ref[0]->linesize,
1884
                                  (const uint8_t**)prev->data, prev->linesize,
1885
                                  s->avctx->pix_fmt, s->mb_width*16, s->mb_height*16);
1886
                    h->short_ref[0]->poc = prev->poc+2;
1887
                }
1888
                h->short_ref[0]->frame_num = h->prev_frame_num;
1889
            }
1890
        }
1891

    
1892
        /* See if we have a decoded first field looking for a pair... */
1893
        if (s0->first_field) {
1894
            assert(s0->current_picture_ptr);
1895
            assert(s0->current_picture_ptr->data[0]);
1896
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1897

    
1898
            /* figure out if we have a complementary field pair */
1899
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1900
                /*
1901
                 * Previous field is unmatched. Don't display it, but let it
1902
                 * remain for reference if marked as such.
1903
                 */
1904
                s0->current_picture_ptr = NULL;
1905
                s0->first_field = FIELD_PICTURE;
1906

    
1907
            } else {
1908
                if (h->nal_ref_idc &&
1909
                        s0->current_picture_ptr->reference &&
1910
                        s0->current_picture_ptr->frame_num != h->frame_num) {
1911
                    /*
1912
                     * This and previous field were reference, but had
1913
                     * different frame_nums. Consider this field first in
1914
                     * pair. Throw away previous field except for reference
1915
                     * purposes.
1916
                     */
1917
                    s0->first_field = 1;
1918
                    s0->current_picture_ptr = NULL;
1919

    
1920
                } else {
1921
                    /* Second field in complementary pair */
1922
                    s0->first_field = 0;
1923
                }
1924
            }
1925

    
1926
        } else {
1927
            /* Frame or first field in a potentially complementary pair */
1928
            assert(!s0->current_picture_ptr);
1929
            s0->first_field = FIELD_PICTURE;
1930
        }
1931

    
1932
        if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1933
            s0->first_field = 0;
1934
            return -1;
1935
        }
1936
    }
1937
    if(h != h0)
1938
        clone_slice(h, h0);
1939

    
1940
    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1941

    
1942
    assert(s->mb_num == s->mb_width * s->mb_height);
1943
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1944
       first_mb_in_slice                    >= s->mb_num){
1945
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1946
        return -1;
1947
    }
1948
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1949
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1950
    if (s->picture_structure == PICT_BOTTOM_FIELD)
1951
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
1952
    assert(s->mb_y < s->mb_height);
1953

    
1954
    if(s->picture_structure==PICT_FRAME){
1955
        h->curr_pic_num=   h->frame_num;
1956
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1957
    }else{
1958
        h->curr_pic_num= 2*h->frame_num + 1;
1959
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1960
    }
1961

    
1962
    if(h->nal_unit_type == NAL_IDR_SLICE){
1963
        get_ue_golomb(&s->gb); /* idr_pic_id */
1964
    }
1965

    
1966
    if(h->sps.poc_type==0){
1967
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
1968

    
1969
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
1970
            h->delta_poc_bottom= get_se_golomb(&s->gb);
1971
        }
1972
    }
1973

    
1974
    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
1975
        h->delta_poc[0]= get_se_golomb(&s->gb);
1976

    
1977
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
1978
            h->delta_poc[1]= get_se_golomb(&s->gb);
1979
    }
1980

    
1981
    init_poc(h);
1982

    
1983
    if(h->pps.redundant_pic_cnt_present){
1984
        h->redundant_pic_count= get_ue_golomb(&s->gb);
1985
    }
1986

    
1987
    //set defaults, might be overridden a few lines later
1988
    h->ref_count[0]= h->pps.ref_count[0];
1989
    h->ref_count[1]= h->pps.ref_count[1];
1990

    
1991
    if(h->slice_type_nos != FF_I_TYPE){
1992
        if(h->slice_type_nos == FF_B_TYPE){
1993
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
1994
        }
1995
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
1996

    
1997
        if(num_ref_idx_active_override_flag){
1998
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
1999
            if(h->slice_type_nos==FF_B_TYPE)
2000
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
2001

    
2002
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
2003
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
2004
                h->ref_count[0]= h->ref_count[1]= 1;
2005
                return -1;
2006
            }
2007
        }
2008
        if(h->slice_type_nos == FF_B_TYPE)
2009
            h->list_count= 2;
2010
        else
2011
            h->list_count= 1;
2012
    }else
2013
        h->list_count= 0;
2014

    
2015
    if(!default_ref_list_done){
2016
        ff_h264_fill_default_ref_list(h);
2017
    }
2018

    
2019
    if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
2020
        return -1;
2021

    
2022
    if(h->slice_type_nos!=FF_I_TYPE){
2023
        s->last_picture_ptr= &h->ref_list[0][0];
2024
        ff_copy_picture(&s->last_picture, s->last_picture_ptr);
2025
    }
2026
    if(h->slice_type_nos==FF_B_TYPE){
2027
        s->next_picture_ptr= &h->ref_list[1][0];
2028
        ff_copy_picture(&s->next_picture, s->next_picture_ptr);
2029
    }
2030

    
2031
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
2032
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
2033
        pred_weight_table(h);
2034
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
2035
        implicit_weight_table(h, -1);
2036
    }else {
2037
        h->use_weight = 0;
2038
        for (i = 0; i < 2; i++) {
2039
            h->luma_weight_flag[i]   = 0;
2040
            h->chroma_weight_flag[i] = 0;
2041
        }
2042
    }
2043

    
2044
    if(h->nal_ref_idc)
2045
        ff_h264_decode_ref_pic_marking(h0, &s->gb);
2046

    
2047
    if(FRAME_MBAFF){
2048
        ff_h264_fill_mbaff_ref_list(h);
2049

    
2050
        if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
2051
            implicit_weight_table(h, 0);
2052
            implicit_weight_table(h, 1);
2053
        }
2054
    }
2055

    
2056
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
2057
        ff_h264_direct_dist_scale_factor(h);
2058
    ff_h264_direct_ref_list_init(h);
2059

    
2060
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
2061
        tmp = get_ue_golomb_31(&s->gb);
2062
        if(tmp > 2){
2063
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
2064
            return -1;
2065
        }
2066
        h->cabac_init_idc= tmp;
2067
    }
2068

    
2069
    h->last_qscale_diff = 0;
2070
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2071
    if(tmp>51){
2072
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2073
        return -1;
2074
    }
2075
    s->qscale= tmp;
2076
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2077
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2078
    //FIXME qscale / qp ... stuff
2079
    if(h->slice_type == FF_SP_TYPE){
2080
        get_bits1(&s->gb); /* sp_for_switch_flag */
2081
    }
2082
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
2083
        get_se_golomb(&s->gb); /* slice_qs_delta */
2084
    }
2085

    
2086
    h->deblocking_filter = 1;
2087
    h->slice_alpha_c0_offset = 52;
2088
    h->slice_beta_offset = 52;
2089
    if( h->pps.deblocking_filter_parameters_present ) {
2090
        tmp= get_ue_golomb_31(&s->gb);
2091
        if(tmp > 2){
2092
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2093
            return -1;
2094
        }
2095
        h->deblocking_filter= tmp;
2096
        if(h->deblocking_filter < 2)
2097
            h->deblocking_filter^= 1; // 1<->0
2098

    
2099
        if( h->deblocking_filter ) {
2100
            h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2101
            h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2102
            if(   h->slice_alpha_c0_offset > 104U
2103
               || h->slice_beta_offset     > 104U){
2104
                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);
2105
                return -1;
2106
            }
2107
        }
2108
    }
2109

    
2110
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2111
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2112
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
2113
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2114
        h->deblocking_filter= 0;
2115

    
2116
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2117
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2118
            /* Cheat slightly for speed:
2119
               Do not bother to deblock across slices. */
2120
            h->deblocking_filter = 2;
2121
        } else {
2122
            h0->max_contexts = 1;
2123
            if(!h0->single_decode_warning) {
2124
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2125
                h0->single_decode_warning = 1;
2126
            }
2127
            if(h != h0)
2128
                return 1; // deblocking switched inside frame
2129
        }
2130
    }
2131
    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]);
2132

    
2133
#if 0 //FMO
2134
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2135
        slice_group_change_cycle= get_bits(&s->gb, ?);
2136
#endif
2137

    
2138
    h0->last_slice_type = slice_type;
2139
    h->slice_num = ++h0->current_slice;
2140
    if(h->slice_num >= MAX_SLICES){
2141
        av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2142
    }
2143

    
2144
    for(j=0; j<2; j++){
2145
        int id_list[16];
2146
        int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2147
        for(i=0; i<16; i++){
2148
            id_list[i]= 60;
2149
            if(h->ref_list[j][i].data[0]){
2150
                int k;
2151
                uint8_t *base= h->ref_list[j][i].base[0];
2152
                for(k=0; k<h->short_ref_count; k++)
2153
                    if(h->short_ref[k]->base[0] == base){
2154
                        id_list[i]= k;
2155
                        break;
2156
                    }
2157
                for(k=0; k<h->long_ref_count; k++)
2158
                    if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2159
                        id_list[i]= h->short_ref_count + k;
2160
                        break;
2161
                    }
2162
            }
2163
        }
2164

    
2165
        ref2frm[0]=
2166
        ref2frm[1]= -1;
2167
        for(i=0; i<16; i++)
2168
            ref2frm[i+2]= 4*id_list[i]
2169
                          +(h->ref_list[j][i].reference&3);
2170
        ref2frm[18+0]=
2171
        ref2frm[18+1]= -1;
2172
        for(i=16; i<48; i++)
2173
            ref2frm[i+4]= 4*id_list[(i-16)>>1]
2174
                          +(h->ref_list[j][i].reference&3);
2175
    }
2176

    
2177
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2178
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2179

    
2180
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2181
        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",
2182
               h->slice_num,
2183
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2184
               first_mb_in_slice,
2185
               av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2186
               pps_id, h->frame_num,
2187
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2188
               h->ref_count[0], h->ref_count[1],
2189
               s->qscale,
2190
               h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2191
               h->use_weight,
2192
               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2193
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2194
               );
2195
    }
2196

    
2197
    return 0;
2198
}
2199

    
2200
int ff_h264_get_slice_type(const H264Context *h)
2201
{
2202
    switch (h->slice_type) {
2203
    case FF_P_TYPE:  return 0;
2204
    case FF_B_TYPE:  return 1;
2205
    case FF_I_TYPE:  return 2;
2206
    case FF_SP_TYPE: return 3;
2207
    case FF_SI_TYPE: return 4;
2208
    default:         return -1;
2209
    }
2210
}
2211

    
2212
/**
2213
 *
2214
 * @return non zero if the loop filter can be skiped
2215
 */
2216
static int fill_filter_caches(H264Context *h, int mb_type){
2217
    MpegEncContext * const s = &h->s;
2218
    const int mb_xy= h->mb_xy;
2219
    int top_xy, left_xy[2];
2220
    int top_type, left_type[2];
2221

    
2222
    top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
2223

    
2224
    //FIXME deblocking could skip the intra and nnz parts.
2225

    
2226
    /* Wow, what a mess, why didn't they simplify the interlacing & intra
2227
     * stuff, I can't imagine that these complex rules are worth it. */
2228

    
2229
    left_xy[1] = left_xy[0] = mb_xy-1;
2230
    if(FRAME_MBAFF){
2231
        const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
2232
        const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
2233
        if(s->mb_y&1){
2234
            if (left_mb_field_flag != curr_mb_field_flag) {
2235
                left_xy[0] -= s->mb_stride;
2236
            }
2237
        }else{
2238
            if(curr_mb_field_flag){
2239
                top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
2240
            }
2241
            if (left_mb_field_flag != curr_mb_field_flag) {
2242
                left_xy[1] += s->mb_stride;
2243
            }
2244
        }
2245
    }
2246

    
2247
    h->top_mb_xy = top_xy;
2248
    h->left_mb_xy[0] = left_xy[0];
2249
    h->left_mb_xy[1] = left_xy[1];
2250
    {
2251
        //for sufficiently low qp, filtering wouldn't do anything
2252
        //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
2253
        int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
2254
        int qp = s->current_picture.qscale_table[mb_xy];
2255
        if(qp <= qp_thresh
2256
           && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
2257
           && (top_xy   < 0 || ((qp + s->current_picture.qscale_table[top_xy    ] + 1)>>1) <= qp_thresh)){
2258
            if(!FRAME_MBAFF)
2259
                return 1;
2260
            if(   (left_xy[0]< 0            || ((qp + s->current_picture.qscale_table[left_xy[1]             ] + 1)>>1) <= qp_thresh)
2261
               && (top_xy    < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy    -s->mb_stride] + 1)>>1) <= qp_thresh))
2262
                return 1;
2263
        }
2264
    }
2265

    
2266
    top_type     = s->current_picture.mb_type[top_xy]    ;
2267
    left_type[0] = s->current_picture.mb_type[left_xy[0]];
2268
    left_type[1] = s->current_picture.mb_type[left_xy[1]];
2269
    if(h->deblocking_filter == 2){
2270
        if(h->slice_table[top_xy     ] != h->slice_num) top_type= 0;
2271
        if(h->slice_table[left_xy[0] ] != h->slice_num) left_type[0]= left_type[1]= 0;
2272
    }else{
2273
        if(h->slice_table[top_xy     ] == 0xFFFF) top_type= 0;
2274
        if(h->slice_table[left_xy[0] ] == 0xFFFF) left_type[0]= left_type[1] =0;
2275
    }
2276
    h->top_type    = top_type    ;
2277
    h->left_type[0]= left_type[0];
2278
    h->left_type[1]= left_type[1];
2279

    
2280
    if(IS_INTRA(mb_type))
2281
        return 0;
2282

    
2283
    AV_COPY64(&h->non_zero_count_cache[0+8*1], &h->non_zero_count[mb_xy][ 0]);
2284
    AV_COPY64(&h->non_zero_count_cache[0+8*2], &h->non_zero_count[mb_xy][ 8]);
2285
    AV_COPY32(&h->non_zero_count_cache[0+8*5], &h->non_zero_count[mb_xy][16]);
2286
    AV_COPY32(&h->non_zero_count_cache[4+8*3], &h->non_zero_count[mb_xy][20]);
2287
    AV_COPY64(&h->non_zero_count_cache[0+8*4], &h->non_zero_count[mb_xy][24]);
2288

    
2289
    h->cbp= h->cbp_table[mb_xy];
2290

    
2291
    {
2292
        int list;
2293
        for(list=0; list<h->list_count; list++){
2294
            int8_t *ref;
2295
            int y, b_stride;
2296
            int16_t (*mv_dst)[2];
2297
            int16_t (*mv_src)[2];
2298

    
2299
            if(!USES_LIST(mb_type, list)){
2300
                fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
2301
                AV_WN32A(&h->ref_cache[list][scan8[ 0]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2302
                AV_WN32A(&h->ref_cache[list][scan8[ 2]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2303
                AV_WN32A(&h->ref_cache[list][scan8[ 8]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2304
                AV_WN32A(&h->ref_cache[list][scan8[10]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2305
                continue;
2306
            }
2307

    
2308
            ref = &s->current_picture.ref_index[list][4*mb_xy];
2309
            {
2310
                int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2311
                AV_WN32A(&h->ref_cache[list][scan8[ 0]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2312
                AV_WN32A(&h->ref_cache[list][scan8[ 2]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2313
                ref += 2;
2314
                AV_WN32A(&h->ref_cache[list][scan8[ 8]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2315
                AV_WN32A(&h->ref_cache[list][scan8[10]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2316
            }
2317

    
2318
            b_stride = h->b_stride;
2319
            mv_dst   = &h->mv_cache[list][scan8[0]];
2320
            mv_src   = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
2321
            for(y=0; y<4; y++){
2322
                AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
2323
            }
2324

    
2325
        }
2326
    }
2327

    
2328

    
2329
/*
2330
0 . T T. T T T T
2331
1 L . .L . . . .
2332
2 L . .L . . . .
2333
3 . T TL . . . .
2334
4 L . .L . . . .
2335
5 L . .. . . . .
2336
*/
2337
//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
2338
    if(top_type){
2339
        AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][4+3*8]);
2340
    }
2341

    
2342
    if(left_type[0]){
2343
        h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][7+0*8];
2344
        h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][7+1*8];
2345
        h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][7+2*8];
2346
        h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][7+3*8];
2347
    }
2348

    
2349
    // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
2350
    if(!CABAC && h->pps.transform_8x8_mode){
2351
        if(IS_8x8DCT(top_type)){
2352
            h->non_zero_count_cache[4+8*0]=
2353
            h->non_zero_count_cache[5+8*0]= h->cbp_table[top_xy] & 4;
2354
            h->non_zero_count_cache[6+8*0]=
2355
            h->non_zero_count_cache[7+8*0]= h->cbp_table[top_xy] & 8;
2356
        }
2357
        if(IS_8x8DCT(left_type[0])){
2358
            h->non_zero_count_cache[3+8*1]=
2359
            h->non_zero_count_cache[3+8*2]= h->cbp_table[left_xy[0]]&2; //FIXME check MBAFF
2360
        }
2361
        if(IS_8x8DCT(left_type[1])){
2362
            h->non_zero_count_cache[3+8*3]=
2363
            h->non_zero_count_cache[3+8*4]= h->cbp_table[left_xy[1]]&8; //FIXME check MBAFF
2364
        }
2365

    
2366
        if(IS_8x8DCT(mb_type)){
2367
            h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
2368
            h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= h->cbp & 1;
2369

    
2370
            h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
2371
            h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
2372

    
2373
            h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
2374
            h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
2375

    
2376
            h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
2377
            h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
2378
        }
2379
    }
2380

    
2381
    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
2382
        int list;
2383
        for(list=0; list<h->list_count; list++){
2384
            if(USES_LIST(top_type, list)){
2385
                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
2386
                const int b8_xy= 4*top_xy + 2;
2387
                int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2388
                AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
2389
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
2390
                h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
2391
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
2392
                h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
2393
            }else{
2394
                AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
2395
                AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2396
            }
2397

    
2398
            if(!IS_INTERLACED(mb_type^left_type[0])){
2399
                if(USES_LIST(left_type[0], list)){
2400
                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
2401
                    const int b8_xy= 4*left_xy[0] + 1;
2402
                    int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2403
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 0 ], s->current_picture.motion_val[list][b_xy + h->b_stride*0]);
2404
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 8 ], s->current_picture.motion_val[list][b_xy + h->b_stride*1]);
2405
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 +16 ], s->current_picture.motion_val[list][b_xy + h->b_stride*2]);
2406
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 +24 ], s->current_picture.motion_val[list][b_xy + h->b_stride*3]);
2407
                    h->ref_cache[list][scan8[0] - 1 + 0 ]=
2408
                    h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*0]];
2409
                    h->ref_cache[list][scan8[0] - 1 +16 ]=
2410
                    h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*1]];
2411
                }else{
2412
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 0 ]);
2413
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 8 ]);
2414
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +16 ]);
2415
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +24 ]);
2416
                    h->ref_cache[list][scan8[0] - 1 + 0  ]=
2417
                    h->ref_cache[list][scan8[0] - 1 + 8  ]=
2418
                    h->ref_cache[list][scan8[0] - 1 + 16 ]=
2419
                    h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
2420
                }
2421
            }
2422
        }
2423
    }
2424

    
2425
    return 0;
2426
}
2427

    
2428
static void loop_filter(H264Context *h){
2429
    MpegEncContext * const s = &h->s;
2430
    uint8_t  *dest_y, *dest_cb, *dest_cr;
2431
    int linesize, uvlinesize, mb_x, mb_y;
2432
    const int end_mb_y= s->mb_y + FRAME_MBAFF;
2433
    const int old_slice_type= h->slice_type;
2434

    
2435
    if(h->deblocking_filter) {
2436
        for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2437
            for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2438
                int mb_xy, mb_type;
2439
                mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2440
                h->slice_num= h->slice_table[mb_xy];
2441
                mb_type= s->current_picture.mb_type[mb_xy];
2442
                h->list_count= h->list_counts[mb_xy];
2443

    
2444
                if(FRAME_MBAFF)
2445
                    h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2446

    
2447
                s->mb_x= mb_x;
2448
                s->mb_y= mb_y;
2449
                dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2450
                dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2451
                dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2452
                    //FIXME simplify above
2453

    
2454
                if (MB_FIELD) {
2455
                    linesize   = h->mb_linesize   = s->linesize * 2;
2456
                    uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2457
                    if(mb_y&1){ //FIXME move out of this function?
2458
                        dest_y -= s->linesize*15;
2459
                        dest_cb-= s->uvlinesize*7;
2460
                        dest_cr-= s->uvlinesize*7;
2461
                    }
2462
                } else {
2463
                    linesize   = h->mb_linesize   = s->linesize;
2464
                    uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2465
                }
2466
                backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2467
                if(fill_filter_caches(h, mb_type))
2468
                    continue;
2469
                h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2470
                h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2471

    
2472
                if (FRAME_MBAFF) {
2473
                    ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2474
                } else {
2475
                    ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2476
                }
2477
            }
2478
        }
2479
    }
2480
    h->slice_type= old_slice_type;
2481
    s->mb_x= 0;
2482
    s->mb_y= end_mb_y - FRAME_MBAFF;
2483
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2484
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2485
}
2486

    
2487
static void predict_field_decoding_flag(H264Context *h){
2488
    MpegEncContext * const s = &h->s;
2489
    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2490
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
2491
                ? s->current_picture.mb_type[mb_xy-1]
2492
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
2493
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
2494
                : 0;
2495
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2496
}
2497

    
2498
static int decode_slice(struct AVCodecContext *avctx, void *arg){
2499
    H264Context *h = *(void**)arg;
2500
    MpegEncContext * const s = &h->s;
2501
    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2502

    
2503
    s->mb_skip_run= -1;
2504

    
2505
    h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2506
                    (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2507

    
2508
    if( h->pps.cabac ) {
2509
        /* realign */
2510
        align_get_bits( &s->gb );
2511

    
2512
        /* init cabac */
2513
        ff_init_cabac_states( &h->cabac);
2514
        ff_init_cabac_decoder( &h->cabac,
2515
                               s->gb.buffer + get_bits_count(&s->gb)/8,
2516
                               (get_bits_left(&s->gb) + 7)/8);
2517

    
2518
        ff_h264_init_cabac_states(h);
2519

    
2520
        for(;;){
2521
//START_TIMER
2522
            int ret = ff_h264_decode_mb_cabac(h);
2523
            int eos;
2524
//STOP_TIMER("decode_mb_cabac")
2525

    
2526
            if(ret>=0) ff_h264_hl_decode_mb(h);
2527

    
2528
            if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2529
                s->mb_y++;
2530

    
2531
                ret = ff_h264_decode_mb_cabac(h);
2532

    
2533
                if(ret>=0) ff_h264_hl_decode_mb(h);
2534
                s->mb_y--;
2535
            }
2536
            eos = get_cabac_terminate( &h->cabac );
2537

    
2538
            if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2539
                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);
2540
                return 0;
2541
            }
2542
            if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2543
                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);
2544
                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);
2545
                return -1;
2546
            }
2547

    
2548
            if( ++s->mb_x >= s->mb_width ) {
2549
                s->mb_x = 0;
2550
                loop_filter(h);
2551
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
2552
                ++s->mb_y;
2553
                if(FIELD_OR_MBAFF_PICTURE) {
2554
                    ++s->mb_y;
2555
                    if(FRAME_MBAFF && s->mb_y < s->mb_height)
2556
                        predict_field_decoding_flag(h);
2557
                }
2558
            }
2559

    
2560
            if( eos || s->mb_y >= s->mb_height ) {
2561
                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2562
                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);
2563
                return 0;
2564
            }
2565
        }
2566

    
2567
    } else {
2568
        for(;;){
2569
            int ret = ff_h264_decode_mb_cavlc(h);
2570

    
2571
            if(ret>=0) ff_h264_hl_decode_mb(h);
2572

    
2573
            if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2574
                s->mb_y++;
2575
                ret = ff_h264_decode_mb_cavlc(h);
2576

    
2577
                if(ret>=0) ff_h264_hl_decode_mb(h);
2578
                s->mb_y--;
2579
            }
2580

    
2581
            if(ret<0){
2582
                av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2583
                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);
2584

    
2585
                return -1;
2586
            }
2587

    
2588
            if(++s->mb_x >= s->mb_width){
2589
                s->mb_x=0;
2590
                loop_filter(h);
2591
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
2592
                ++s->mb_y;
2593
                if(FIELD_OR_MBAFF_PICTURE) {
2594
                    ++s->mb_y;
2595
                    if(FRAME_MBAFF && s->mb_y < s->mb_height)
2596
                        predict_field_decoding_flag(h);
2597
                }
2598
                if(s->mb_y >= s->mb_height){
2599
                    tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2600

    
2601
                    if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2602
                        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);
2603

    
2604
                        return 0;
2605
                    }else{
2606
                        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);
2607

    
2608
                        return -1;
2609
                    }
2610
                }
2611
            }
2612

    
2613
            if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2614
                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2615
                if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2616
                    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);
2617

    
2618
                    return 0;
2619
                }else{
2620
                    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);
2621

    
2622
                    return -1;
2623
                }
2624
            }
2625
        }
2626
    }
2627

    
2628
#if 0
2629
    for(;s->mb_y < s->mb_height; s->mb_y++){
2630
        for(;s->mb_x < s->mb_width; s->mb_x++){
2631
            int ret= decode_mb(h);
2632

2633
            ff_h264_hl_decode_mb(h);
2634

2635
            if(ret<0){
2636
                av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2637
                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);
2638

2639
                return -1;
2640
            }
2641

2642
            if(++s->mb_x >= s->mb_width){
2643
                s->mb_x=0;
2644
                if(++s->mb_y >= s->mb_height){
2645
                    if(get_bits_count(s->gb) == s->gb.size_in_bits){
2646
                        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);
2647

2648
                        return 0;
2649
                    }else{
2650
                        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);
2651

2652
                        return -1;
2653
                    }
2654
                }
2655
            }
2656

2657
            if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2658
                if(get_bits_count(s->gb) == s->gb.size_in_bits){
2659
                    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);
2660

2661
                    return 0;
2662
                }else{
2663
                    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);
2664

2665
                    return -1;
2666
                }
2667
            }
2668
        }
2669
        s->mb_x=0;
2670
        ff_draw_horiz_band(s, 16*s->mb_y, 16);
2671
    }
2672
#endif
2673
    return -1; //not reached
2674
}
2675

    
2676
/**
2677
 * Call decode_slice() for each context.
2678
 *
2679
 * @param h h264 master context
2680
 * @param context_count number of contexts to execute
2681
 */
2682
static void execute_decode_slices(H264Context *h, int context_count){
2683
    MpegEncContext * const s = &h->s;
2684
    AVCodecContext * const avctx= s->avctx;
2685
    H264Context *hx;
2686
    int i;
2687

    
2688
    if (s->avctx->hwaccel)
2689
        return;
2690
    if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2691
        return;
2692
    if(context_count == 1) {
2693
        decode_slice(avctx, &h);
2694
    } else {
2695
        for(i = 1; i < context_count; i++) {
2696
            hx = h->thread_context[i];
2697
            hx->s.error_recognition = avctx->error_recognition;
2698
            hx->s.error_count = 0;
2699
        }
2700

    
2701
        avctx->execute(avctx, (void *)decode_slice,
2702
                       h->thread_context, NULL, context_count, sizeof(void*));
2703

    
2704
        /* pull back stuff from slices to master context */
2705
        hx = h->thread_context[context_count - 1];
2706
        s->mb_x = hx->s.mb_x;
2707
        s->mb_y = hx->s.mb_y;
2708
        s->dropable = hx->s.dropable;
2709
        s->picture_structure = hx->s.picture_structure;
2710
        for(i = 1; i < context_count; i++)
2711
            h->s.error_count += h->thread_context[i]->s.error_count;
2712
    }
2713
}
2714

    
2715

    
2716
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2717
    MpegEncContext * const s = &h->s;
2718
    AVCodecContext * const avctx= s->avctx;
2719
    int buf_index=0;
2720
    H264Context *hx; ///< thread context
2721
    int context_count = 0;
2722
    int next_avc= h->is_avc ? 0 : buf_size;
2723

    
2724
    h->max_contexts = avctx->thread_count;
2725
#if 0
2726
    int i;
2727
    for(i=0; i<50; i++){
2728
        av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2729
    }
2730
#endif
2731
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2732
        h->current_slice = 0;
2733
        if (!s->first_field)
2734
            s->current_picture_ptr= NULL;
2735
        ff_h264_reset_sei(h);
2736
    }
2737

    
2738
    for(;;){
2739
        int consumed;
2740
        int dst_length;
2741
        int bit_length;
2742
        const uint8_t *ptr;
2743
        int i, nalsize = 0;
2744
        int err;
2745

    
2746
        if(buf_index >= next_avc) {
2747
            if(buf_index >= buf_size) break;
2748
            nalsize = 0;
2749
            for(i = 0; i < h->nal_length_size; i++)
2750
                nalsize = (nalsize << 8) | buf[buf_index++];
2751
            if(nalsize <= 0 || nalsize > buf_size - buf_index){
2752
                av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2753
                break;
2754
            }
2755
            next_avc= buf_index + nalsize;
2756
        } else {
2757
            // start code prefix search
2758
            for(; buf_index + 3 < next_avc; buf_index++){
2759
                // This should always succeed in the first iteration.
2760
                if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2761
                    break;
2762
            }
2763

    
2764
            if(buf_index+3 >= buf_size) break;
2765

    
2766
            buf_index+=3;
2767
            if(buf_index >= next_avc) continue;
2768
        }
2769

    
2770
        hx = h->thread_context[context_count];
2771

    
2772
        ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2773
        if (ptr==NULL || dst_length < 0){
2774
            return -1;
2775
        }
2776
        i= buf_index + consumed;
2777
        if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2778
           buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2779
            s->workaround_bugs |= FF_BUG_TRUNCATED;
2780

    
2781
        if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2782
        while(ptr[dst_length - 1] == 0 && dst_length > 0)
2783
            dst_length--;
2784
        }
2785
        bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2786

    
2787
        if(s->avctx->debug&FF_DEBUG_STARTCODE){
2788
            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);
2789
        }
2790

    
2791
        if (h->is_avc && (nalsize != consumed) && nalsize){
2792
            av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2793
        }
2794

    
2795
        buf_index += consumed;
2796

    
2797
        if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
2798
           ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
2799
            continue;
2800

    
2801
      again:
2802
        err = 0;
2803
        switch(hx->nal_unit_type){
2804
        case NAL_IDR_SLICE:
2805
            if (h->nal_unit_type != NAL_IDR_SLICE) {
2806
                av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2807
                return -1;
2808
            }
2809
            idr(h); //FIXME ensure we don't loose some frames if there is reordering
2810
        case NAL_SLICE:
2811
            init_get_bits(&hx->s.gb, ptr, bit_length);
2812
            hx->intra_gb_ptr=
2813
            hx->inter_gb_ptr= &hx->s.gb;
2814
            hx->s.data_partitioning = 0;
2815

    
2816
            if((err = decode_slice_header(hx, h)))
2817
               break;
2818

    
2819
            if (h->current_slice == 1) {
2820
                if (s->avctx->hwaccel && s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2821
                    return -1;
2822
                if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2823
                    ff_vdpau_h264_picture_start(s);
2824
            }
2825

    
2826
            s->current_picture_ptr->key_frame |=
2827
                    (hx->nal_unit_type == NAL_IDR_SLICE) ||
2828
                    (h->sei_recovery_frame_cnt >= 0);
2829
            if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2830
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2831
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2832
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2833
               && avctx->skip_frame < AVDISCARD_ALL){
2834
                if(avctx->hwaccel) {
2835
                    if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2836
                        return -1;
2837
                }else
2838
                if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2839
                    static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2840
                    ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2841
                    ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2842
                }else
2843
                    context_count++;
2844
            }
2845
            break;
2846
        case NAL_DPA:
2847
            init_get_bits(&hx->s.gb, ptr, bit_length);
2848
            hx->intra_gb_ptr=
2849
            hx->inter_gb_ptr= NULL;
2850

    
2851
            if ((err = decode_slice_header(hx, h)) < 0)
2852
                break;
2853

    
2854
            hx->s.data_partitioning = 1;
2855

    
2856
            break;
2857
        case NAL_DPB:
2858
            init_get_bits(&hx->intra_gb, ptr, bit_length);
2859
            hx->intra_gb_ptr= &hx->intra_gb;
2860
            break;
2861
        case NAL_DPC:
2862
            init_get_bits(&hx->inter_gb, ptr, bit_length);
2863
            hx->inter_gb_ptr= &hx->inter_gb;
2864

    
2865
            if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2866
               && s->context_initialized
2867
               && s->hurry_up < 5
2868
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2869
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2870
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2871
               && avctx->skip_frame < AVDISCARD_ALL)
2872
                context_count++;
2873
            break;
2874
        case NAL_SEI:
2875
            init_get_bits(&s->gb, ptr, bit_length);
2876
            ff_h264_decode_sei(h);
2877
            break;
2878
        case NAL_SPS:
2879
            init_get_bits(&s->gb, ptr, bit_length);
2880
            ff_h264_decode_seq_parameter_set(h);
2881

    
2882
            if(s->flags& CODEC_FLAG_LOW_DELAY)
2883
                s->low_delay=1;
2884

    
2885
            if(avctx->has_b_frames < 2)
2886
                avctx->has_b_frames= !s->low_delay;
2887
            break;
2888
        case NAL_PPS:
2889
            init_get_bits(&s->gb, ptr, bit_length);
2890

    
2891
            ff_h264_decode_picture_parameter_set(h, bit_length);
2892

    
2893
            break;
2894
        case NAL_AUD:
2895
        case NAL_END_SEQUENCE:
2896
        case NAL_END_STREAM:
2897
        case NAL_FILLER_DATA:
2898
        case NAL_SPS_EXT:
2899
        case NAL_AUXILIARY_SLICE:
2900
            break;
2901
        default:
2902
            av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2903
        }
2904

    
2905
        if(context_count == h->max_contexts) {
2906
            execute_decode_slices(h, context_count);
2907
            context_count = 0;
2908
        }
2909

    
2910
        if (err < 0)
2911
            av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2912
        else if(err == 1) {
2913
            /* Slice could not be decoded in parallel mode, copy down
2914
             * NAL unit stuff to context 0 and restart. Note that
2915
             * rbsp_buffer is not transferred, but since we no longer
2916
             * run in parallel mode this should not be an issue. */
2917
            h->nal_unit_type = hx->nal_unit_type;
2918
            h->nal_ref_idc   = hx->nal_ref_idc;
2919
            hx = h;
2920
            goto again;
2921
        }
2922
    }
2923
    if(context_count)
2924
        execute_decode_slices(h, context_count);
2925
    return buf_index;
2926
}
2927

    
2928
/**
2929
 * returns the number of bytes consumed for building the current frame
2930
 */
2931
static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2932
        if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2933
        if(pos+10>buf_size) pos=buf_size; // oops ;)
2934

    
2935
        return pos;
2936
}
2937

    
2938
static int decode_frame(AVCodecContext *avctx,
2939
                             void *data, int *data_size,
2940
                             AVPacket *avpkt)
2941
{
2942
    const uint8_t *buf = avpkt->data;
2943
    int buf_size = avpkt->size;
2944
    H264Context *h = avctx->priv_data;
2945
    MpegEncContext *s = &h->s;
2946
    AVFrame *pict = data;
2947
    int buf_index;
2948

    
2949
    s->flags= avctx->flags;
2950
    s->flags2= avctx->flags2;
2951

    
2952
   /* end of stream, output what is still in the buffers */
2953
 out:
2954
    if (buf_size == 0) {
2955
        Picture *out;
2956
        int i, out_idx;
2957

    
2958
//FIXME factorize this with the output code below
2959
        out = h->delayed_pic[0];
2960
        out_idx = 0;
2961
        for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2962
            if(h->delayed_pic[i]->poc < out->poc){
2963
                out = h->delayed_pic[i];
2964
                out_idx = i;
2965
            }
2966

    
2967
        for(i=out_idx; h->delayed_pic[i]; i++)
2968
            h->delayed_pic[i] = h->delayed_pic[i+1];
2969

    
2970
        if(out){
2971
            *data_size = sizeof(AVFrame);
2972
            *pict= *(AVFrame*)out;
2973
        }
2974

    
2975
        return 0;
2976
    }
2977

    
2978
    buf_index=decode_nal_units(h, buf, buf_size);
2979
    if(buf_index < 0)
2980
        return -1;
2981

    
2982
    if (!s->current_picture_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
2983
        buf_size = 0;
2984
        goto out;
2985
    }
2986

    
2987
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
2988
        if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
2989
        av_log(avctx, AV_LOG_ERROR, "no frame!\n");
2990
        return -1;
2991
    }
2992

    
2993
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
2994
        Picture *out = s->current_picture_ptr;
2995
        Picture *cur = s->current_picture_ptr;
2996
        int i, pics, out_of_order, out_idx;
2997

    
2998
        field_end(h);
2999

    
3000
        if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
3001
            /* Wait for second field. */
3002
            *data_size = 0;
3003

    
3004
        } else {
3005
            cur->interlaced_frame = 0;
3006
            cur->repeat_pict = 0;
3007

    
3008
            /* Signal interlacing information externally. */
3009
            /* Prioritize picture timing SEI information over used decoding process if it exists. */
3010

    
3011
            if(h->sps.pic_struct_present_flag){
3012
                switch (h->sei_pic_struct)
3013
                {
3014
                case SEI_PIC_STRUCT_FRAME:
3015
                    break;
3016
                case SEI_PIC_STRUCT_TOP_FIELD:
3017
                case SEI_PIC_STRUCT_BOTTOM_FIELD:
3018
                    cur->interlaced_frame = 1;
3019
                    break;
3020
                case SEI_PIC_STRUCT_TOP_BOTTOM:
3021
                case SEI_PIC_STRUCT_BOTTOM_TOP:
3022
                    if (FIELD_OR_MBAFF_PICTURE)
3023
                        cur->interlaced_frame = 1;
3024
                    else
3025
                        // try to flag soft telecine progressive
3026
                        cur->interlaced_frame = h->prev_interlaced_frame;
3027
                    break;
3028
                case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
3029
                case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
3030
                    // Signal the possibility of telecined film externally (pic_struct 5,6)
3031
                    // From these hints, let the applications decide if they apply deinterlacing.
3032
                    cur->repeat_pict = 1;
3033
                    break;
3034
                case SEI_PIC_STRUCT_FRAME_DOUBLING:
3035
                    // Force progressive here, as doubling interlaced frame is a bad idea.
3036
                    cur->repeat_pict = 2;
3037
                    break;
3038
                case SEI_PIC_STRUCT_FRAME_TRIPLING:
3039
                    cur->repeat_pict = 4;
3040
                    break;
3041
                }
3042

    
3043
                if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
3044
                    cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
3045
            }else{
3046
                /* Derive interlacing flag from used decoding process. */
3047
                cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
3048
            }
3049
            h->prev_interlaced_frame = cur->interlaced_frame;
3050

    
3051
            if (cur->field_poc[0] != cur->field_poc[1]){
3052
                /* Derive top_field_first from field pocs. */
3053
                cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
3054
            }else{
3055
                if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
3056
                    /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
3057
                    if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
3058
                      || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
3059
                        cur->top_field_first = 1;
3060
                    else
3061
                        cur->top_field_first = 0;
3062
                }else{
3063
                    /* Most likely progressive */
3064
                    cur->top_field_first = 0;
3065
                }
3066
            }
3067

    
3068
        //FIXME do something with unavailable reference frames
3069

    
3070
            /* Sort B-frames into display order */
3071

    
3072
            if(h->sps.bitstream_restriction_flag
3073
               && s->avctx->has_b_frames < h->sps.num_reorder_frames){
3074
                s->avctx->has_b_frames = h->sps.num_reorder_frames;
3075
                s->low_delay = 0;
3076
            }
3077

    
3078
            if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
3079
               && !h->sps.bitstream_restriction_flag){
3080
                s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
3081
                s->low_delay= 0;
3082
            }
3083

    
3084
            pics = 0;
3085
            while(h->delayed_pic[pics]) pics++;
3086

    
3087
            assert(pics <= MAX_DELAYED_PIC_COUNT);
3088

    
3089
            h->delayed_pic[pics++] = cur;
3090
            if(cur->reference == 0)
3091
                cur->reference = DELAYED_PIC_REF;
3092

    
3093
            out = h->delayed_pic[0];
3094
            out_idx = 0;
3095
            for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
3096
                if(h->delayed_pic[i]->poc < out->poc){
3097
                    out = h->delayed_pic[i];
3098
                    out_idx = i;
3099
                }
3100
            if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
3101
                h->outputed_poc= INT_MIN;
3102
            out_of_order = out->poc < h->outputed_poc;
3103

    
3104
            if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
3105
                { }
3106
            else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
3107
               || (s->low_delay &&
3108
                ((h->outputed_poc != INT_MIN && out->poc > h->outputed_poc + 2)
3109
                 || cur->pict_type == FF_B_TYPE)))
3110
            {
3111
                s->low_delay = 0;
3112
                s->avctx->has_b_frames++;
3113
            }
3114

    
3115
            if(out_of_order || pics > s->avctx->has_b_frames){
3116
                out->reference &= ~DELAYED_PIC_REF;
3117
                for(i=out_idx; h->delayed_pic[i]; i++)
3118
                    h->delayed_pic[i] = h->delayed_pic[i+1];
3119
            }
3120
            if(!out_of_order && pics > s->avctx->has_b_frames){
3121
                *data_size = sizeof(AVFrame);
3122

    
3123
                if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
3124
                    h->outputed_poc = INT_MIN;
3125
                } else
3126
                    h->outputed_poc = out->poc;
3127
                *pict= *(AVFrame*)out;
3128
            }else{
3129
                av_log(avctx, AV_LOG_DEBUG, "no picture\n");
3130
            }
3131
        }
3132
    }
3133

    
3134
    assert(pict->data[0] || !*data_size);
3135
    ff_print_debug_info(s, pict);
3136
//printf("out %d\n", (int)pict->data[0]);
3137

    
3138
    return get_consumed_bytes(s, buf_index, buf_size);
3139
}
3140
#if 0
3141
static inline void fill_mb_avail(H264Context *h){
3142
    MpegEncContext * const s = &h->s;
3143
    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3144

3145
    if(s->mb_y){
3146
        h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
3147
        h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
3148
        h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
3149
    }else{
3150
        h->mb_avail[0]=
3151
        h->mb_avail[1]=
3152
        h->mb_avail[2]= 0;
3153
    }
3154
    h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
3155
    h->mb_avail[4]= 1; //FIXME move out
3156
    h->mb_avail[5]= 0; //FIXME move out
3157
}
3158
#endif
3159

    
3160
#ifdef TEST
3161
#undef printf
3162
#undef random
3163
#define COUNT 8000
3164
#define SIZE (COUNT*40)
3165
int main(void){
3166
    int i;
3167
    uint8_t temp[SIZE];
3168
    PutBitContext pb;
3169
    GetBitContext gb;
3170
//    int int_temp[10000];
3171
    DSPContext dsp;
3172
    AVCodecContext avctx;
3173

    
3174
    dsputil_init(&dsp, &avctx);
3175

    
3176
    init_put_bits(&pb, temp, SIZE);
3177
    printf("testing unsigned exp golomb\n");
3178
    for(i=0; i<COUNT; i++){
3179
        START_TIMER
3180
        set_ue_golomb(&pb, i);
3181
        STOP_TIMER("set_ue_golomb");
3182
    }
3183
    flush_put_bits(&pb);
3184

    
3185
    init_get_bits(&gb, temp, 8*SIZE);
3186
    for(i=0; i<COUNT; i++){
3187
        int j, s;
3188

    
3189
        s= show_bits(&gb, 24);
3190

    
3191
        START_TIMER
3192
        j= get_ue_golomb(&gb);
3193
        if(j != i){
3194
            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3195
//            return -1;
3196
        }
3197
        STOP_TIMER("get_ue_golomb");
3198
    }
3199

    
3200

    
3201
    init_put_bits(&pb, temp, SIZE);
3202
    printf("testing signed exp golomb\n");
3203
    for(i=0; i<COUNT; i++){
3204
        START_TIMER
3205
        set_se_golomb(&pb, i - COUNT/2);
3206
        STOP_TIMER("set_se_golomb");
3207
    }
3208
    flush_put_bits(&pb);
3209

    
3210
    init_get_bits(&gb, temp, 8*SIZE);
3211
    for(i=0; i<COUNT; i++){
3212
        int j, s;
3213

    
3214
        s= show_bits(&gb, 24);
3215

    
3216
        START_TIMER
3217
        j= get_se_golomb(&gb);
3218
        if(j != i - COUNT/2){
3219
            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3220
//            return -1;
3221
        }
3222
        STOP_TIMER("get_se_golomb");
3223
    }
3224

    
3225
#if 0
3226
    printf("testing 4x4 (I)DCT\n");
3227

3228
    DCTELEM block[16];
3229
    uint8_t src[16], ref[16];
3230
    uint64_t error= 0, max_error=0;
3231

3232
    for(i=0; i<COUNT; i++){
3233
        int j;
3234
//        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
3235
        for(j=0; j<16; j++){
3236
            ref[j]= random()%255;
3237
            src[j]= random()%255;
3238
        }
3239

3240
        h264_diff_dct_c(block, src, ref, 4);
3241

3242
        //normalize
3243
        for(j=0; j<16; j++){
3244
//            printf("%d ", block[j]);
3245
            block[j]= block[j]*4;
3246
            if(j&1) block[j]= (block[j]*4 + 2)/5;
3247
            if(j&4) block[j]= (block[j]*4 + 2)/5;
3248
        }
3249
//        printf("\n");
3250

3251
        h->h264dsp.h264_idct_add(ref, block, 4);
3252
/*        for(j=0; j<16; j++){
3253
            printf("%d ", ref[j]);
3254
        }
3255
        printf("\n");*/
3256

3257
        for(j=0; j<16; j++){
3258
            int diff= FFABS(src[j] - ref[j]);
3259

3260
            error+= diff*diff;
3261
            max_error= FFMAX(max_error, diff);
3262
        }
3263
    }
3264
    printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
3265
    printf("testing quantizer\n");
3266
    for(qp=0; qp<52; qp++){
3267
        for(i=0; i<16; i++)
3268
            src1_block[i]= src2_block[i]= random()%255;
3269

3270
    }
3271
    printf("Testing NAL layer\n");
3272

3273
    uint8_t bitstream[COUNT];
3274
    uint8_t nal[COUNT*2];
3275
    H264Context h;
3276
    memset(&h, 0, sizeof(H264Context));
3277

3278
    for(i=0; i<COUNT; i++){
3279
        int zeros= i;
3280
        int nal_length;
3281
        int consumed;
3282
        int out_length;
3283
        uint8_t *out;
3284
        int j;
3285

3286
        for(j=0; j<COUNT; j++){
3287
            bitstream[j]= (random() % 255) + 1;
3288
        }
3289

3290
        for(j=0; j<zeros; j++){
3291
            int pos= random() % COUNT;
3292
            while(bitstream[pos] == 0){
3293
                pos++;
3294
                pos %= COUNT;
3295
            }
3296
            bitstream[pos]=0;
3297
        }
3298

3299
        START_TIMER
3300

3301
        nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
3302
        if(nal_length<0){
3303
            printf("encoding failed\n");
3304
            return -1;
3305
        }
3306

3307
        out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
3308

3309
        STOP_TIMER("NAL")
3310

3311
        if(out_length != COUNT){
3312
            printf("incorrect length %d %d\n", out_length, COUNT);
3313
            return -1;
3314
        }
3315

3316
        if(consumed != nal_length){
3317
            printf("incorrect consumed length %d %d\n", nal_length, consumed);
3318
            return -1;
3319
        }
3320

3321
        if(memcmp(bitstream, out, COUNT)){
3322
            printf("mismatch\n");
3323
            return -1;
3324
        }
3325
    }
3326
#endif
3327

    
3328
    printf("Testing RBSP\n");
3329

    
3330

    
3331
    return 0;
3332
}
3333
#endif /* TEST */
3334

    
3335

    
3336
av_cold void ff_h264_free_context(H264Context *h)
3337
{
3338
    int i;
3339

    
3340
    free_tables(h, 1); //FIXME cleanup init stuff perhaps
3341

    
3342
    for(i = 0; i < MAX_SPS_COUNT; i++)
3343
        av_freep(h->sps_buffers + i);
3344

    
3345
    for(i = 0; i < MAX_PPS_COUNT; i++)
3346
        av_freep(h->pps_buffers + i);
3347
}
3348

    
3349
av_cold int ff_h264_decode_end(AVCodecContext *avctx)
3350
{
3351
    H264Context *h = avctx->priv_data;
3352
    MpegEncContext *s = &h->s;
3353

    
3354
    ff_h264_free_context(h);
3355

    
3356
    MPV_common_end(s);
3357

    
3358
//    memset(h, 0, sizeof(H264Context));
3359

    
3360
    return 0;
3361
}
3362

    
3363

    
3364
AVCodec h264_decoder = {
3365
    "h264",
3366
    AVMEDIA_TYPE_VIDEO,
3367
    CODEC_ID_H264,
3368
    sizeof(H264Context),
3369
    ff_h264_decode_init,
3370
    NULL,
3371
    ff_h264_decode_end,
3372
    decode_frame,
3373
    /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
3374
    .flush= flush_dpb,
3375
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
3376
};
3377

    
3378
#if CONFIG_H264_VDPAU_DECODER
3379
AVCodec h264_vdpau_decoder = {
3380
    "h264_vdpau",
3381
    AVMEDIA_TYPE_VIDEO,
3382
    CODEC_ID_H264,
3383
    sizeof(H264Context),
3384
    ff_h264_decode_init,
3385
    NULL,
3386
    ff_h264_decode_end,
3387
    decode_frame,
3388
    CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
3389
    .flush= flush_dpb,
3390
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
3391
    .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
3392
};
3393
#endif