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

    
42
#include "cabac.h"
43

    
44
//#undef NDEBUG
45
#include <assert.h>
46

    
47
static const uint8_t rem6[52]={
48
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,
49
};
50

    
51
static const uint8_t div6[52]={
52
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,
53
};
54

    
55
static const enum PixelFormat hwaccel_pixfmt_list_h264_jpeg_420[] = {
56
    PIX_FMT_DXVA2_VLD,
57
    PIX_FMT_VAAPI_VLD,
58
    PIX_FMT_YUVJ420P,
59
    PIX_FMT_NONE
60
};
61

    
62
void ff_h264_write_back_intra_pred_mode(H264Context *h){
63
    int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
64

    
65
    AV_COPY32(mode, h->intra4x4_pred_mode_cache + 4 + 8*4);
66
    mode[4]= h->intra4x4_pred_mode_cache[7+8*3];
67
    mode[5]= h->intra4x4_pred_mode_cache[7+8*2];
68
    mode[6]= h->intra4x4_pred_mode_cache[7+8*1];
69
}
70

    
71
/**
72
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
73
 */
74
int ff_h264_check_intra4x4_pred_mode(H264Context *h){
75
    MpegEncContext * const s = &h->s;
76
    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
77
    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
78
    int i;
79

    
80
    if(!(h->top_samples_available&0x8000)){
81
        for(i=0; i<4; i++){
82
            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
83
            if(status<0){
84
                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);
85
                return -1;
86
            } else if(status){
87
                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
88
            }
89
        }
90
    }
91

    
92
    if((h->left_samples_available&0x8888)!=0x8888){
93
        static const int mask[4]={0x8000,0x2000,0x80,0x20};
94
        for(i=0; i<4; i++){
95
            if(!(h->left_samples_available&mask[i])){
96
                int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
97
                if(status<0){
98
                    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);
99
                    return -1;
100
                } else if(status){
101
                    h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
102
                }
103
            }
104
        }
105
    }
106

    
107
    return 0;
108
} //FIXME cleanup like ff_h264_check_intra_pred_mode
109

    
110
/**
111
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
112
 */
113
int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
114
    MpegEncContext * const s = &h->s;
115
    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
116
    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
117

    
118
    if(mode > 6U) {
119
        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);
120
        return -1;
121
    }
122

    
123
    if(!(h->top_samples_available&0x8000)){
124
        mode= top[ mode ];
125
        if(mode<0){
126
            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);
127
            return -1;
128
        }
129
    }
130

    
131
    if((h->left_samples_available&0x8080) != 0x8080){
132
        mode= left[ mode ];
133
        if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
134
            mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
135
        }
136
        if(mode<0){
137
            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);
138
            return -1;
139
        }
140
    }
141

    
142
    return mode;
143
}
144

    
145
const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
146
    int i, si, di;
147
    uint8_t *dst;
148
    int bufidx;
149

    
150
//    src[0]&0x80;                //forbidden bit
151
    h->nal_ref_idc= src[0]>>5;
152
    h->nal_unit_type= src[0]&0x1F;
153

    
154
    src++; length--;
155
#if 0
156
    for(i=0; i<length; i++)
157
        printf("%2X ", src[i]);
158
#endif
159

    
160
#if HAVE_FAST_UNALIGNED
161
# if HAVE_FAST_64BIT
162
#   define RS 7
163
    for(i=0; i+1<length; i+=9){
164
        if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
165
# else
166
#   define RS 3
167
    for(i=0; i+1<length; i+=5){
168
        if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
169
# endif
170
            continue;
171
        if(i>0 && !src[i]) i--;
172
        while(src[i]) i++;
173
#else
174
#   define RS 0
175
    for(i=0; i+1<length; i+=2){
176
        if(src[i]) continue;
177
        if(i>0 && src[i-1]==0) i--;
178
#endif
179
        if(i+2<length && src[i+1]==0 && src[i+2]<=3){
180
            if(src[i+2]!=3){
181
                /* startcode, so we must be past the end */
182
                length=i;
183
            }
184
            break;
185
        }
186
        i-= RS;
187
    }
188

    
189
    if(i>=length-1){ //no escaped 0
190
        *dst_length= length;
191
        *consumed= length+1; //+1 for the header
192
        return src;
193
    }
194

    
195
    bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
196
    av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
197
    dst= h->rbsp_buffer[bufidx];
198

    
199
    if (dst == NULL){
200
        return NULL;
201
    }
202

    
203
//printf("decoding esc\n");
204
    memcpy(dst, src, i);
205
    si=di=i;
206
    while(si+2<length){
207
        //remove escapes (very rare 1:2^22)
208
        if(src[si+2]>3){
209
            dst[di++]= src[si++];
210
            dst[di++]= src[si++];
211
        }else if(src[si]==0 && src[si+1]==0){
212
            if(src[si+2]==3){ //escape
213
                dst[di++]= 0;
214
                dst[di++]= 0;
215
                si+=3;
216
                continue;
217
            }else //next start code
218
                goto nsc;
219
        }
220

    
221
        dst[di++]= src[si++];
222
    }
223
    while(si<length)
224
        dst[di++]= src[si++];
225
nsc:
226

    
227
    memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
228

    
229
    *dst_length= di;
230
    *consumed= si + 1;//+1 for the header
231
//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
232
    return dst;
233
}
234

    
235
int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
236
    int v= *src;
237
    int r;
238

    
239
    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
240

    
241
    for(r=1; r<9; r++){
242
        if(v&1) return r;
243
        v>>=1;
244
    }
245
    return 0;
246
}
247

    
248
/**
249
 * IDCT transforms the 16 dc values and dequantizes them.
250
 * @param qp quantization parameter
251
 */
252
static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
253
#define stride 16
254
    int i;
255
    int temp[16]; //FIXME check if this is a good idea
256
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
257
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
258

    
259
//memset(block, 64, 2*256);
260
//return;
261
    for(i=0; i<4; i++){
262
        const int offset= y_offset[i];
263
        const int z0= block[offset+stride*0] + block[offset+stride*4];
264
        const int z1= block[offset+stride*0] - block[offset+stride*4];
265
        const int z2= block[offset+stride*1] - block[offset+stride*5];
266
        const int z3= block[offset+stride*1] + block[offset+stride*5];
267

    
268
        temp[4*i+0]= z0+z3;
269
        temp[4*i+1]= z1+z2;
270
        temp[4*i+2]= z1-z2;
271
        temp[4*i+3]= z0-z3;
272
    }
273

    
274
    for(i=0; i<4; i++){
275
        const int offset= x_offset[i];
276
        const int z0= temp[4*0+i] + temp[4*2+i];
277
        const int z1= temp[4*0+i] - temp[4*2+i];
278
        const int z2= temp[4*1+i] - temp[4*3+i];
279
        const int z3= temp[4*1+i] + temp[4*3+i];
280

    
281
        block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
282
        block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
283
        block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
284
        block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
285
    }
286
}
287

    
288
#if 0
289
/**
290
 * DCT transforms the 16 dc values.
291
 * @param qp quantization parameter ??? FIXME
292
 */
293
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
294
//    const int qmul= dequant_coeff[qp][0];
295
    int i;
296
    int temp[16]; //FIXME check if this is a good idea
297
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
298
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
299

300
    for(i=0; i<4; i++){
301
        const int offset= y_offset[i];
302
        const int z0= block[offset+stride*0] + block[offset+stride*4];
303
        const int z1= block[offset+stride*0] - block[offset+stride*4];
304
        const int z2= block[offset+stride*1] - block[offset+stride*5];
305
        const int z3= block[offset+stride*1] + block[offset+stride*5];
306

307
        temp[4*i+0]= z0+z3;
308
        temp[4*i+1]= z1+z2;
309
        temp[4*i+2]= z1-z2;
310
        temp[4*i+3]= z0-z3;
311
    }
312

313
    for(i=0; i<4; i++){
314
        const int offset= x_offset[i];
315
        const int z0= temp[4*0+i] + temp[4*2+i];
316
        const int z1= temp[4*0+i] - temp[4*2+i];
317
        const int z2= temp[4*1+i] - temp[4*3+i];
318
        const int z3= temp[4*1+i] + temp[4*3+i];
319

320
        block[stride*0 +offset]= (z0 + z3)>>1;
321
        block[stride*2 +offset]= (z1 + z2)>>1;
322
        block[stride*8 +offset]= (z1 - z2)>>1;
323
        block[stride*10+offset]= (z0 - z3)>>1;
324
    }
325
}
326
#endif
327

    
328
#undef xStride
329
#undef stride
330

    
331
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
332
    const int stride= 16*2;
333
    const int xStride= 16;
334
    int a,b,c,d,e;
335

    
336
    a= block[stride*0 + xStride*0];
337
    b= block[stride*0 + xStride*1];
338
    c= block[stride*1 + xStride*0];
339
    d= block[stride*1 + xStride*1];
340

    
341
    e= a-b;
342
    a= a+b;
343
    b= c-d;
344
    c= c+d;
345

    
346
    block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
347
    block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
348
    block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
349
    block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
350
}
351

    
352
#if 0
353
static void chroma_dc_dct_c(DCTELEM *block){
354
    const int stride= 16*2;
355
    const int xStride= 16;
356
    int a,b,c,d,e;
357

358
    a= block[stride*0 + xStride*0];
359
    b= block[stride*0 + xStride*1];
360
    c= block[stride*1 + xStride*0];
361
    d= block[stride*1 + xStride*1];
362

363
    e= a-b;
364
    a= a+b;
365
    b= c-d;
366
    c= c+d;
367

368
    block[stride*0 + xStride*0]= (a+c);
369
    block[stride*0 + xStride*1]= (e+b);
370
    block[stride*1 + xStride*0]= (a-c);
371
    block[stride*1 + xStride*1]= (e-b);
372
}
373
#endif
374

    
375
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
376
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
377
                           int src_x_offset, int src_y_offset,
378
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
379
    MpegEncContext * const s = &h->s;
380
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
381
    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
382
    const int luma_xy= (mx&3) + ((my&3)<<2);
383
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
384
    uint8_t * src_cb, * src_cr;
385
    int extra_width= h->emu_edge_width;
386
    int extra_height= h->emu_edge_height;
387
    int emu=0;
388
    const int full_mx= mx>>2;
389
    const int full_my= my>>2;
390
    const int pic_width  = 16*s->mb_width;
391
    const int pic_height = 16*s->mb_height >> MB_FIELD;
392

    
393
    if(mx&7) extra_width -= 3;
394
    if(my&7) extra_height -= 3;
395

    
396
    if(   full_mx < 0-extra_width
397
       || full_my < 0-extra_height
398
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
399
       || full_my + 16/*FIXME*/ > pic_height + extra_height){
400
        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);
401
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
402
        emu=1;
403
    }
404

    
405
    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
406
    if(!square){
407
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
408
    }
409

    
410
    if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
411

    
412
    if(MB_FIELD){
413
        // chroma offset when predicting from a field of opposite parity
414
        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
415
        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
416
    }
417
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
418
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
419

    
420
    if(emu){
421
        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);
422
            src_cb= s->edge_emu_buffer;
423
    }
424
    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
425

    
426
    if(emu){
427
        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);
428
            src_cr= s->edge_emu_buffer;
429
    }
430
    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
431
}
432

    
433
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
434
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
435
                           int x_offset, int y_offset,
436
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
437
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
438
                           int list0, int list1){
439
    MpegEncContext * const s = &h->s;
440
    qpel_mc_func *qpix_op=  qpix_put;
441
    h264_chroma_mc_func chroma_op= chroma_put;
442

    
443
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
444
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
445
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
446
    x_offset += 8*s->mb_x;
447
    y_offset += 8*(s->mb_y >> MB_FIELD);
448

    
449
    if(list0){
450
        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
451
        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
452
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
453
                           qpix_op, chroma_op);
454

    
455
        qpix_op=  qpix_avg;
456
        chroma_op= chroma_avg;
457
    }
458

    
459
    if(list1){
460
        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
461
        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
462
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
463
                           qpix_op, chroma_op);
464
    }
465
}
466

    
467
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
468
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
469
                           int x_offset, int y_offset,
470
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
471
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
472
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
473
                           int list0, int list1){
474
    MpegEncContext * const s = &h->s;
475

    
476
    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
477
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
478
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
479
    x_offset += 8*s->mb_x;
480
    y_offset += 8*(s->mb_y >> MB_FIELD);
481

    
482
    if(list0 && list1){
483
        /* don't optimize for luma-only case, since B-frames usually
484
         * use implicit weights => chroma too. */
485
        uint8_t *tmp_cb = s->obmc_scratchpad;
486
        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
487
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
488
        int refn0 = h->ref_cache[0][ scan8[n] ];
489
        int refn1 = h->ref_cache[1][ scan8[n] ];
490

    
491
        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
492
                    dest_y, dest_cb, dest_cr,
493
                    x_offset, y_offset, qpix_put, chroma_put);
494
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
495
                    tmp_y, tmp_cb, tmp_cr,
496
                    x_offset, y_offset, qpix_put, chroma_put);
497

    
498
        if(h->use_weight == 2){
499
            int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
500
            int weight1 = 64 - weight0;
501
            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
502
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
503
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
504
        }else{
505
            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
506
                            h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
507
                            h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
508
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
509
                            h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
510
                            h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
511
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
512
                            h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
513
                            h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
514
        }
515
    }else{
516
        int list = list1 ? 1 : 0;
517
        int refn = h->ref_cache[list][ scan8[n] ];
518
        Picture *ref= &h->ref_list[list][refn];
519
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
520
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
521
                    qpix_put, chroma_put);
522

    
523
        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
524
                       h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
525
        if(h->use_weight_chroma){
526
            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
527
                             h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
528
            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
529
                             h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
530
        }
531
    }
532
}
533

    
534
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
535
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
536
                           int x_offset, int y_offset,
537
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
538
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
539
                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
540
                           int list0, int list1){
541
    if((h->use_weight==2 && list0 && list1
542
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
543
       || h->use_weight==1)
544
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
545
                         x_offset, y_offset, qpix_put, chroma_put,
546
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
547
    else
548
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
549
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
550
}
551

    
552
static inline void prefetch_motion(H264Context *h, int list){
553
    /* fetch pixels for estimated mv 4 macroblocks ahead
554
     * optimized for 64byte cache lines */
555
    MpegEncContext * const s = &h->s;
556
    const int refn = h->ref_cache[list][scan8[0]];
557
    if(refn >= 0){
558
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
559
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
560
        uint8_t **src= h->ref_list[list][refn].data;
561
        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
562
        s->dsp.prefetch(src[0]+off, s->linesize, 4);
563
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
564
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
565
    }
566
}
567

    
568
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
569
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
570
                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
571
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
572
    MpegEncContext * const s = &h->s;
573
    const int mb_xy= h->mb_xy;
574
    const int mb_type= s->current_picture.mb_type[mb_xy];
575

    
576
    assert(IS_INTER(mb_type));
577

    
578
    prefetch_motion(h, 0);
579

    
580
    if(IS_16X16(mb_type)){
581
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
582
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
583
                weight_op, weight_avg,
584
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
585
    }else if(IS_16X8(mb_type)){
586
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
587
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
588
                &weight_op[1], &weight_avg[1],
589
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
590
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
591
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
592
                &weight_op[1], &weight_avg[1],
593
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
594
    }else if(IS_8X16(mb_type)){
595
        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
596
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
597
                &weight_op[2], &weight_avg[2],
598
                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
599
        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
600
                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
601
                &weight_op[2], &weight_avg[2],
602
                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
603
    }else{
604
        int i;
605

    
606
        assert(IS_8X8(mb_type));
607

    
608
        for(i=0; i<4; i++){
609
            const int sub_mb_type= h->sub_mb_type[i];
610
            const int n= 4*i;
611
            int x_offset= (i&1)<<2;
612
            int y_offset= (i&2)<<1;
613

    
614
            if(IS_SUB_8X8(sub_mb_type)){
615
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
616
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
617
                    &weight_op[3], &weight_avg[3],
618
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
619
            }else if(IS_SUB_8X4(sub_mb_type)){
620
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
621
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
622
                    &weight_op[4], &weight_avg[4],
623
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
624
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
625
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
626
                    &weight_op[4], &weight_avg[4],
627
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
628
            }else if(IS_SUB_4X8(sub_mb_type)){
629
                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
630
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
631
                    &weight_op[5], &weight_avg[5],
632
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
633
                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
634
                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
635
                    &weight_op[5], &weight_avg[5],
636
                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
637
            }else{
638
                int j;
639
                assert(IS_SUB_4X4(sub_mb_type));
640
                for(j=0; j<4; j++){
641
                    int sub_x_offset= x_offset + 2*(j&1);
642
                    int sub_y_offset= y_offset +   (j&2);
643
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
644
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
645
                        &weight_op[6], &weight_avg[6],
646
                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
647
                }
648
            }
649
        }
650
    }
651

    
652
    prefetch_motion(h, 1);
653
}
654

    
655

    
656
static void free_tables(H264Context *h){
657
    int i;
658
    H264Context *hx;
659
    av_freep(&h->intra4x4_pred_mode);
660
    av_freep(&h->chroma_pred_mode_table);
661
    av_freep(&h->cbp_table);
662
    av_freep(&h->mvd_table[0]);
663
    av_freep(&h->mvd_table[1]);
664
    av_freep(&h->direct_table);
665
    av_freep(&h->non_zero_count);
666
    av_freep(&h->slice_table_base);
667
    h->slice_table= NULL;
668
    av_freep(&h->list_counts);
669

    
670
    av_freep(&h->mb2b_xy);
671
    av_freep(&h->mb2br_xy);
672

    
673
    for(i = 0; i < MAX_THREADS; i++) {
674
        hx = h->thread_context[i];
675
        if(!hx) continue;
676
        av_freep(&hx->top_borders[1]);
677
        av_freep(&hx->top_borders[0]);
678
        av_freep(&hx->s.obmc_scratchpad);
679
        av_freep(&hx->rbsp_buffer[1]);
680
        av_freep(&hx->rbsp_buffer[0]);
681
        hx->rbsp_buffer_size[0] = 0;
682
        hx->rbsp_buffer_size[1] = 0;
683
        if (i) av_freep(&h->thread_context[i]);
684
    }
685
}
686

    
687
static void init_dequant8_coeff_table(H264Context *h){
688
    int i,q,x;
689
    const int transpose = (h->h264dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
690
    h->dequant8_coeff[0] = h->dequant8_buffer[0];
691
    h->dequant8_coeff[1] = h->dequant8_buffer[1];
692

    
693
    for(i=0; i<2; i++ ){
694
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
695
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
696
            break;
697
        }
698

    
699
        for(q=0; q<52; q++){
700
            int shift = div6[q];
701
            int idx = rem6[q];
702
            for(x=0; x<64; x++)
703
                h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
704
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
705
                    h->pps.scaling_matrix8[i][x]) << shift;
706
        }
707
    }
708
}
709

    
710
static void init_dequant4_coeff_table(H264Context *h){
711
    int i,j,q,x;
712
    const int transpose = (h->h264dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
713
    for(i=0; i<6; i++ ){
714
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
715
        for(j=0; j<i; j++){
716
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
717
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
718
                break;
719
            }
720
        }
721
        if(j<i)
722
            continue;
723

    
724
        for(q=0; q<52; q++){
725
            int shift = div6[q] + 2;
726
            int idx = rem6[q];
727
            for(x=0; x<16; x++)
728
                h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
729
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
730
                    h->pps.scaling_matrix4[i][x]) << shift;
731
        }
732
    }
733
}
734

    
735
static void init_dequant_tables(H264Context *h){
736
    int i,x;
737
    init_dequant4_coeff_table(h);
738
    if(h->pps.transform_8x8_mode)
739
        init_dequant8_coeff_table(h);
740
    if(h->sps.transform_bypass){
741
        for(i=0; i<6; i++)
742
            for(x=0; x<16; x++)
743
                h->dequant4_coeff[i][0][x] = 1<<6;
744
        if(h->pps.transform_8x8_mode)
745
            for(i=0; i<2; i++)
746
                for(x=0; x<64; x++)
747
                    h->dequant8_coeff[i][0][x] = 1<<6;
748
    }
749
}
750

    
751

    
752
int ff_h264_alloc_tables(H264Context *h){
753
    MpegEncContext * const s = &h->s;
754
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
755
    const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
756
    int x,y;
757

    
758
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8  * sizeof(uint8_t), fail)
759

    
760
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count    , big_mb_num * 32 * sizeof(uint8_t), fail)
761
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
762
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
763

    
764
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
765
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
766
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
767
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
768
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
769

    
770
    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
771
    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
772

    
773
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy  , big_mb_num * sizeof(uint32_t), fail);
774
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
775
    for(y=0; y<s->mb_height; y++){
776
        for(x=0; x<s->mb_width; x++){
777
            const int mb_xy= x + y*s->mb_stride;
778
            const int b_xy = 4*x + 4*y*h->b_stride;
779

    
780
            h->mb2b_xy [mb_xy]= b_xy;
781
            h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
782
        }
783
    }
784

    
785
    s->obmc_scratchpad = NULL;
786

    
787
    if(!h->dequant4_coeff[0])
788
        init_dequant_tables(h);
789

    
790
    return 0;
791
fail:
792
    free_tables(h);
793
    return -1;
794
}
795

    
796
/**
797
 * Mimic alloc_tables(), but for every context thread.
798
 */
799
static void clone_tables(H264Context *dst, H264Context *src, int i){
800
    MpegEncContext * const s = &src->s;
801
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
802
    dst->non_zero_count           = src->non_zero_count;
803
    dst->slice_table              = src->slice_table;
804
    dst->cbp_table                = src->cbp_table;
805
    dst->mb2b_xy                  = src->mb2b_xy;
806
    dst->mb2br_xy                 = src->mb2br_xy;
807
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
808
    dst->mvd_table[0]             = src->mvd_table[0] + i*8*2*s->mb_stride;
809
    dst->mvd_table[1]             = src->mvd_table[1] + i*8*2*s->mb_stride;
810
    dst->direct_table             = src->direct_table;
811
    dst->list_counts              = src->list_counts;
812

    
813
    dst->s.obmc_scratchpad = NULL;
814
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
815
}
816

    
817
/**
818
 * Init context
819
 * Allocate buffers which are not shared amongst multiple threads.
820
 */
821
static int context_init(H264Context *h){
822
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
823
    FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
824

    
825
    h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
826
    h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
827

    
828
    return 0;
829
fail:
830
    return -1; // free_tables will clean up for us
831
}
832

    
833
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
834

    
835
static av_cold void common_init(H264Context *h){
836
    MpegEncContext * const s = &h->s;
837

    
838
    s->width = s->avctx->width;
839
    s->height = s->avctx->height;
840
    s->codec_id= s->avctx->codec->id;
841

    
842
    ff_h264dsp_init(&h->h264dsp);
843
    ff_h264_pred_init(&h->hpc, s->codec_id);
844

    
845
    h->dequant_coeff_pps= -1;
846
    s->unrestricted_mv=1;
847
    s->decode=1; //FIXME
848

    
849
    dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
850

    
851
    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
852
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
853
}
854

    
855
int ff_h264_decode_extradata(H264Context *h)
856
{
857
    AVCodecContext *avctx = h->s.avctx;
858

    
859
    if(*(char *)avctx->extradata == 1){
860
        int i, cnt, nalsize;
861
        unsigned char *p = avctx->extradata;
862

    
863
        h->is_avc = 1;
864

    
865
        if(avctx->extradata_size < 7) {
866
            av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
867
            return -1;
868
        }
869
        /* sps and pps in the avcC always have length coded with 2 bytes,
870
           so put a fake nal_length_size = 2 while parsing them */
871
        h->nal_length_size = 2;
872
        // Decode sps from avcC
873
        cnt = *(p+5) & 0x1f; // Number of sps
874
        p += 6;
875
        for (i = 0; i < cnt; i++) {
876
            nalsize = AV_RB16(p) + 2;
877
            if(decode_nal_units(h, p, nalsize) < 0) {
878
                av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
879
                return -1;
880
            }
881
            p += nalsize;
882
        }
883
        // Decode pps from avcC
884
        cnt = *(p++); // Number of pps
885
        for (i = 0; i < cnt; i++) {
886
            nalsize = AV_RB16(p) + 2;
887
            if(decode_nal_units(h, p, nalsize)  != nalsize) {
888
                av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
889
                return -1;
890
            }
891
            p += nalsize;
892
        }
893
        // Now store right nal length size, that will be use to parse all other nals
894
        h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
895
    } else {
896
        h->is_avc = 0;
897
        if(decode_nal_units(h, avctx->extradata, avctx->extradata_size) < 0)
898
            return -1;
899
    }
900
    return 0;
901
}
902

    
903
av_cold int ff_h264_decode_init(AVCodecContext *avctx){
904
    H264Context *h= avctx->priv_data;
905
    MpegEncContext * const s = &h->s;
906

    
907
    MPV_decode_defaults(s);
908

    
909
    s->avctx = avctx;
910
    common_init(h);
911

    
912
    s->out_format = FMT_H264;
913
    s->workaround_bugs= avctx->workaround_bugs;
914

    
915
    // set defaults
916
//    s->decode_mb= ff_h263_decode_mb;
917
    s->quarter_sample = 1;
918
    if(!avctx->has_b_frames)
919
    s->low_delay= 1;
920

    
921
    avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
922

    
923
    ff_h264_decode_init_vlc();
924

    
925
    h->thread_context[0] = h;
926
    h->outputed_poc = INT_MIN;
927
    h->prev_poc_msb= 1<<16;
928
    h->x264_build = -1;
929
    ff_h264_reset_sei(h);
930
    if(avctx->codec_id == CODEC_ID_H264){
931
        if(avctx->ticks_per_frame == 1){
932
            s->avctx->time_base.den *=2;
933
        }
934
        avctx->ticks_per_frame = 2;
935
    }
936

    
937
    if(avctx->extradata_size > 0 && avctx->extradata &&
938
        ff_h264_decode_extradata(h))
939
        return -1;
940

    
941
    if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
942
        s->avctx->has_b_frames = h->sps.num_reorder_frames;
943
        s->low_delay = 0;
944
    }
945

    
946
    return 0;
947
}
948

    
949
int ff_h264_frame_start(H264Context *h){
950
    MpegEncContext * const s = &h->s;
951
    int i;
952

    
953
    if(MPV_frame_start(s, s->avctx) < 0)
954
        return -1;
955
    ff_er_frame_start(s);
956
    /*
957
     * MPV_frame_start uses pict_type to derive key_frame.
958
     * This is incorrect for H.264; IDR markings must be used.
959
     * Zero here; IDR markings per slice in frame or fields are ORed in later.
960
     * See decode_nal_units().
961
     */
962
    s->current_picture_ptr->key_frame= 0;
963
    s->current_picture_ptr->mmco_reset= 0;
964

    
965
    assert(s->linesize && s->uvlinesize);
966

    
967
    for(i=0; i<16; i++){
968
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
969
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
970
    }
971
    for(i=0; i<4; i++){
972
        h->block_offset[16+i]=
973
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
974
        h->block_offset[24+16+i]=
975
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
976
    }
977

    
978
    /* can't be in alloc_tables because linesize isn't known there.
979
     * FIXME: redo bipred weight to not require extra buffer? */
980
    for(i = 0; i < s->avctx->thread_count; i++)
981
        if(!h->thread_context[i]->s.obmc_scratchpad)
982
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
983

    
984
    /* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
985
    memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
986

    
987
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
988

    
989
    // We mark the current picture as non-reference after allocating it, so
990
    // that if we break out due to an error it can be released automatically
991
    // in the next MPV_frame_start().
992
    // SVQ3 as well as most other codecs have only last/next/current and thus
993
    // get released even with set reference, besides SVQ3 and others do not
994
    // mark frames as reference later "naturally".
995
    if(s->codec_id != CODEC_ID_SVQ3)
996
        s->current_picture_ptr->reference= 0;
997

    
998
    s->current_picture_ptr->field_poc[0]=
999
    s->current_picture_ptr->field_poc[1]= INT_MAX;
1000
    assert(s->current_picture_ptr->long_ref==0);
1001

    
1002
    return 0;
1003
}
1004

    
1005
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){
1006
    MpegEncContext * const s = &h->s;
1007
    uint8_t *top_border;
1008
    int top_idx = 1;
1009

    
1010
    src_y  -=   linesize;
1011
    src_cb -= uvlinesize;
1012
    src_cr -= uvlinesize;
1013

    
1014
    if(!simple && FRAME_MBAFF){
1015
        if(s->mb_y&1){
1016
            if(!MB_MBAFF){
1017
                top_border = h->top_borders[0][s->mb_x];
1018
                AV_COPY128(top_border, src_y + 15*linesize);
1019
                if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1020
                    AV_COPY64(top_border+16, src_cb+7*uvlinesize);
1021
                    AV_COPY64(top_border+24, src_cr+7*uvlinesize);
1022
                }
1023
            }
1024
        }else if(MB_MBAFF){
1025
            top_idx = 0;
1026
        }else
1027
            return;
1028
    }
1029

    
1030
    top_border = h->top_borders[top_idx][s->mb_x];
1031
    // There are two lines saved, the line above the the top macroblock of a pair,
1032
    // and the line above the bottom macroblock
1033
    AV_COPY128(top_border, src_y + 16*linesize);
1034

    
1035
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1036
        AV_COPY64(top_border+16, src_cb+8*uvlinesize);
1037
        AV_COPY64(top_border+24, src_cr+8*uvlinesize);
1038
    }
1039
}
1040

    
1041
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){
1042
    MpegEncContext * const s = &h->s;
1043
    int deblock_left;
1044
    int deblock_top;
1045
    int top_idx = 1;
1046
    uint8_t *top_border_m1;
1047
    uint8_t *top_border;
1048

    
1049
    if(!simple && FRAME_MBAFF){
1050
        if(s->mb_y&1){
1051
            if(!MB_MBAFF)
1052
                return;
1053
        }else{
1054
            top_idx = MB_MBAFF ? 0 : 1;
1055
        }
1056
    }
1057

    
1058
    if(h->deblocking_filter == 2) {
1059
        deblock_left = h->left_type[0];
1060
        deblock_top  = h->top_type;
1061
    } else {
1062
        deblock_left = (s->mb_x > 0);
1063
        deblock_top =  (s->mb_y > !!MB_FIELD);
1064
    }
1065

    
1066
    src_y  -=   linesize + 1;
1067
    src_cb -= uvlinesize + 1;
1068
    src_cr -= uvlinesize + 1;
1069

    
1070
    top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1071
    top_border    = h->top_borders[top_idx][s->mb_x];
1072

    
1073
#define XCHG(a,b,xchg)\
1074
if (xchg) AV_SWAP64(b,a);\
1075
else      AV_COPY64(b,a);
1076

    
1077
    if(deblock_top){
1078
        if(deblock_left){
1079
            XCHG(top_border_m1+8, src_y -7, 1);
1080
        }
1081
        XCHG(top_border+0, src_y +1, xchg);
1082
        XCHG(top_border+8, src_y +9, 1);
1083
        if(s->mb_x+1 < s->mb_width){
1084
            XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
1085
        }
1086
    }
1087

    
1088
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1089
        if(deblock_top){
1090
            if(deblock_left){
1091
                XCHG(top_border_m1+16, src_cb -7, 1);
1092
                XCHG(top_border_m1+24, src_cr -7, 1);
1093
            }
1094
            XCHG(top_border+16, src_cb+1, 1);
1095
            XCHG(top_border+24, src_cr+1, 1);
1096
        }
1097
    }
1098
}
1099

    
1100
static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
1101
    MpegEncContext * const s = &h->s;
1102
    const int mb_x= s->mb_x;
1103
    const int mb_y= s->mb_y;
1104
    const int mb_xy= h->mb_xy;
1105
    const int mb_type= s->current_picture.mb_type[mb_xy];
1106
    uint8_t  *dest_y, *dest_cb, *dest_cr;
1107
    int linesize, uvlinesize /*dct_offset*/;
1108
    int i;
1109
    int *block_offset = &h->block_offset[0];
1110
    const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1111
    /* is_h264 should always be true if SVQ3 is disabled. */
1112
    const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1113
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1114
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1115

    
1116
    dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
1117
    dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
1118
    dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
1119

    
1120
    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1121
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
1122

    
1123
    h->list_counts[mb_xy]= h->list_count;
1124

    
1125
    if (!simple && MB_FIELD) {
1126
        linesize   = h->mb_linesize   = s->linesize * 2;
1127
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1128
        block_offset = &h->block_offset[24];
1129
        if(mb_y&1){ //FIXME move out of this function?
1130
            dest_y -= s->linesize*15;
1131
            dest_cb-= s->uvlinesize*7;
1132
            dest_cr-= s->uvlinesize*7;
1133
        }
1134
        if(FRAME_MBAFF) {
1135
            int list;
1136
            for(list=0; list<h->list_count; list++){
1137
                if(!USES_LIST(mb_type, list))
1138
                    continue;
1139
                if(IS_16X16(mb_type)){
1140
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
1141
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1142
                }else{
1143
                    for(i=0; i<16; i+=4){
1144
                        int ref = h->ref_cache[list][scan8[i]];
1145
                        if(ref >= 0)
1146
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1147
                    }
1148
                }
1149
            }
1150
        }
1151
    } else {
1152
        linesize   = h->mb_linesize   = s->linesize;
1153
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1154
//        dct_offset = s->linesize * 16;
1155
    }
1156

    
1157
    if (!simple && IS_INTRA_PCM(mb_type)) {
1158
        for (i=0; i<16; i++) {
1159
            memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
1160
        }
1161
        for (i=0; i<8; i++) {
1162
            memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
1163
            memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
1164
        }
1165
    } else {
1166
        if(IS_INTRA(mb_type)){
1167
            if(h->deblocking_filter)
1168
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1169

    
1170
            if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1171
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1172
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1173
            }
1174

    
1175
            if(IS_INTRA4x4(mb_type)){
1176
                if(simple || !s->encoding){
1177
                    if(IS_8x8DCT(mb_type)){
1178
                        if(transform_bypass){
1179
                            idct_dc_add =
1180
                            idct_add    = s->dsp.add_pixels8;
1181
                        }else{
1182
                            idct_dc_add = h->h264dsp.h264_idct8_dc_add;
1183
                            idct_add    = h->h264dsp.h264_idct8_add;
1184
                        }
1185
                        for(i=0; i<16; i+=4){
1186
                            uint8_t * const ptr= dest_y + block_offset[i];
1187
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1188
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1189
                                h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1190
                            }else{
1191
                                const int nnz = h->non_zero_count_cache[ scan8[i] ];
1192
                                h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1193
                                                            (h->topright_samples_available<<i)&0x4000, linesize);
1194
                                if(nnz){
1195
                                    if(nnz == 1 && h->mb[i*16])
1196
                                        idct_dc_add(ptr, h->mb + i*16, linesize);
1197
                                    else
1198
                                        idct_add   (ptr, h->mb + i*16, linesize);
1199
                                }
1200
                            }
1201
                        }
1202
                    }else{
1203
                        if(transform_bypass){
1204
                            idct_dc_add =
1205
                            idct_add    = s->dsp.add_pixels4;
1206
                        }else{
1207
                            idct_dc_add = h->h264dsp.h264_idct_dc_add;
1208
                            idct_add    = h->h264dsp.h264_idct_add;
1209
                        }
1210
                        for(i=0; i<16; i++){
1211
                            uint8_t * const ptr= dest_y + block_offset[i];
1212
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1213

    
1214
                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1215
                                h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1216
                            }else{
1217
                                uint8_t *topright;
1218
                                int nnz, tr;
1219
                                if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1220
                                    const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1221
                                    assert(mb_y || linesize <= block_offset[i]);
1222
                                    if(!topright_avail){
1223
                                        tr= ptr[3 - linesize]*0x01010101;
1224
                                        topright= (uint8_t*) &tr;
1225
                                    }else
1226
                                        topright= ptr + 4 - linesize;
1227
                                }else
1228
                                    topright= NULL;
1229

    
1230
                                h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1231
                                nnz = h->non_zero_count_cache[ scan8[i] ];
1232
                                if(nnz){
1233
                                    if(is_h264){
1234
                                        if(nnz == 1 && h->mb[i*16])
1235
                                            idct_dc_add(ptr, h->mb + i*16, linesize);
1236
                                        else
1237
                                            idct_add   (ptr, h->mb + i*16, linesize);
1238
                                    }else
1239
                                        ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1240
                                }
1241
                            }
1242
                        }
1243
                    }
1244
                }
1245
            }else{
1246
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1247
                if(is_h264){
1248
                    if(!transform_bypass)
1249
                        h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
1250
                }else
1251
                    ff_svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
1252
            }
1253
            if(h->deblocking_filter)
1254
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1255
        }else if(is_h264){
1256
            hl_motion(h, dest_y, dest_cb, dest_cr,
1257
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1258
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1259
                      h->h264dsp.weight_h264_pixels_tab, h->h264dsp.biweight_h264_pixels_tab);
1260
        }
1261

    
1262

    
1263
        if(!IS_INTRA4x4(mb_type)){
1264
            if(is_h264){
1265
                if(IS_INTRA16x16(mb_type)){
1266
                    if(transform_bypass){
1267
                        if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1268
                            h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1269
                        }else{
1270
                            for(i=0; i<16; i++){
1271
                                if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1272
                                    s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1273
                            }
1274
                        }
1275
                    }else{
1276
                         h->h264dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1277
                    }
1278
                }else if(h->cbp&15){
1279
                    if(transform_bypass){
1280
                        const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1281
                        idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1282
                        for(i=0; i<16; i+=di){
1283
                            if(h->non_zero_count_cache[ scan8[i] ]){
1284
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1285
                            }
1286
                        }
1287
                    }else{
1288
                        if(IS_8x8DCT(mb_type)){
1289
                            h->h264dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1290
                        }else{
1291
                            h->h264dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1292
                        }
1293
                    }
1294
                }
1295
            }else{
1296
                for(i=0; i<16; i++){
1297
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1298
                        uint8_t * const ptr= dest_y + block_offset[i];
1299
                        ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1300
                    }
1301
                }
1302
            }
1303
        }
1304

    
1305
        if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1306
            uint8_t *dest[2] = {dest_cb, dest_cr};
1307
            if(transform_bypass){
1308
                if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1309
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1310
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1311
                }else{
1312
                    idct_add = s->dsp.add_pixels4;
1313
                    for(i=16; i<16+8; i++){
1314
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1315
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1316
                    }
1317
                }
1318
            }else{
1319
                chroma_dc_dequant_idct_c(h->mb + 16*16, h->chroma_qp[0], h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
1320
                chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->chroma_qp[1], h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
1321
                if(is_h264){
1322
                    h->h264dsp.h264_idct_add8(dest, block_offset,
1323
                                              h->mb, uvlinesize,
1324
                                              h->non_zero_count_cache);
1325
                }else{
1326
                    for(i=16; i<16+8; i++){
1327
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1328
                            uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1329
                            ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1330
                        }
1331
                    }
1332
                }
1333
            }
1334
        }
1335
    }
1336
    if(h->cbp || IS_INTRA(mb_type))
1337
        s->dsp.clear_blocks(h->mb);
1338
}
1339

    
1340
/**
1341
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
1342
 */
1343
static void hl_decode_mb_simple(H264Context *h){
1344
    hl_decode_mb_internal(h, 1);
1345
}
1346

    
1347
/**
1348
 * Process a macroblock; this handles edge cases, such as interlacing.
1349
 */
1350
static void av_noinline hl_decode_mb_complex(H264Context *h){
1351
    hl_decode_mb_internal(h, 0);
1352
}
1353

    
1354
void ff_h264_hl_decode_mb(H264Context *h){
1355
    MpegEncContext * const s = &h->s;
1356
    const int mb_xy= h->mb_xy;
1357
    const int mb_type= s->current_picture.mb_type[mb_xy];
1358
    int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1359

    
1360
    if (is_complex)
1361
        hl_decode_mb_complex(h);
1362
    else hl_decode_mb_simple(h);
1363
}
1364

    
1365
static int pred_weight_table(H264Context *h){
1366
    MpegEncContext * const s = &h->s;
1367
    int list, i;
1368
    int luma_def, chroma_def;
1369

    
1370
    h->use_weight= 0;
1371
    h->use_weight_chroma= 0;
1372
    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1373
    h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1374
    luma_def = 1<<h->luma_log2_weight_denom;
1375
    chroma_def = 1<<h->chroma_log2_weight_denom;
1376

    
1377
    for(list=0; list<2; list++){
1378
        h->luma_weight_flag[list]   = 0;
1379
        h->chroma_weight_flag[list] = 0;
1380
        for(i=0; i<h->ref_count[list]; i++){
1381
            int luma_weight_flag, chroma_weight_flag;
1382

    
1383
            luma_weight_flag= get_bits1(&s->gb);
1384
            if(luma_weight_flag){
1385
                h->luma_weight[i][list][0]= get_se_golomb(&s->gb);
1386
                h->luma_weight[i][list][1]= get_se_golomb(&s->gb);
1387
                if(   h->luma_weight[i][list][0] != luma_def
1388
                   || h->luma_weight[i][list][1] != 0) {
1389
                    h->use_weight= 1;
1390
                    h->luma_weight_flag[list]= 1;
1391
                }
1392
            }else{
1393
                h->luma_weight[i][list][0]= luma_def;
1394
                h->luma_weight[i][list][1]= 0;
1395
            }
1396

    
1397
            if(CHROMA){
1398
                chroma_weight_flag= get_bits1(&s->gb);
1399
                if(chroma_weight_flag){
1400
                    int j;
1401
                    for(j=0; j<2; j++){
1402
                        h->chroma_weight[i][list][j][0]= get_se_golomb(&s->gb);
1403
                        h->chroma_weight[i][list][j][1]= get_se_golomb(&s->gb);
1404
                        if(   h->chroma_weight[i][list][j][0] != chroma_def
1405
                           || h->chroma_weight[i][list][j][1] != 0) {
1406
                            h->use_weight_chroma= 1;
1407
                            h->chroma_weight_flag[list]= 1;
1408
                        }
1409
                    }
1410
                }else{
1411
                    int j;
1412
                    for(j=0; j<2; j++){
1413
                        h->chroma_weight[i][list][j][0]= chroma_def;
1414
                        h->chroma_weight[i][list][j][1]= 0;
1415
                    }
1416
                }
1417
            }
1418
        }
1419
        if(h->slice_type_nos != FF_B_TYPE) break;
1420
    }
1421
    h->use_weight= h->use_weight || h->use_weight_chroma;
1422
    return 0;
1423
}
1424

    
1425
/**
1426
 * Initialize implicit_weight table.
1427
 * @param field  0/1 initialize the weight for interlaced MBAFF
1428
 *                -1 initializes the rest
1429
 */
1430
static void implicit_weight_table(H264Context *h, int field){
1431
    MpegEncContext * const s = &h->s;
1432
    int ref0, ref1, i, cur_poc, ref_start, ref_count0, ref_count1;
1433

    
1434
    for (i = 0; i < 2; i++) {
1435
        h->luma_weight_flag[i]   = 0;
1436
        h->chroma_weight_flag[i] = 0;
1437
    }
1438

    
1439
    if(field < 0){
1440
        cur_poc = s->current_picture_ptr->poc;
1441
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1 && !FRAME_MBAFF
1442
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1443
        h->use_weight= 0;
1444
        h->use_weight_chroma= 0;
1445
        return;
1446
    }
1447
        ref_start= 0;
1448
        ref_count0= h->ref_count[0];
1449
        ref_count1= h->ref_count[1];
1450
    }else{
1451
        cur_poc = s->current_picture_ptr->field_poc[field];
1452
        ref_start= 16;
1453
        ref_count0= 16+2*h->ref_count[0];
1454
        ref_count1= 16+2*h->ref_count[1];
1455
    }
1456

    
1457
    h->use_weight= 2;
1458
    h->use_weight_chroma= 2;
1459
    h->luma_log2_weight_denom= 5;
1460
    h->chroma_log2_weight_denom= 5;
1461

    
1462
    for(ref0=ref_start; ref0 < ref_count0; ref0++){
1463
        int poc0 = h->ref_list[0][ref0].poc;
1464
        for(ref1=ref_start; ref1 < ref_count1; ref1++){
1465
            int poc1 = h->ref_list[1][ref1].poc;
1466
            int td = av_clip(poc1 - poc0, -128, 127);
1467
            int w= 32;
1468
            if(td){
1469
                int tb = av_clip(cur_poc - poc0, -128, 127);
1470
                int tx = (16384 + (FFABS(td) >> 1)) / td;
1471
                int dist_scale_factor = (tb*tx + 32) >> 8;
1472
                if(dist_scale_factor >= -64 && dist_scale_factor <= 128)
1473
                    w = 64 - dist_scale_factor;
1474
            }
1475
            if(field<0){
1476
                h->implicit_weight[ref0][ref1][0]=
1477
                h->implicit_weight[ref0][ref1][1]= w;
1478
            }else{
1479
                h->implicit_weight[ref0][ref1][field]=w;
1480
            }
1481
        }
1482
    }
1483
}
1484

    
1485
/**
1486
 * instantaneous decoder refresh.
1487
 */
1488
static void idr(H264Context *h){
1489
    ff_h264_remove_all_refs(h);
1490
    h->prev_frame_num= 0;
1491
    h->prev_frame_num_offset= 0;
1492
    h->prev_poc_msb=
1493
    h->prev_poc_lsb= 0;
1494
}
1495

    
1496
/* forget old pics after a seek */
1497
static void flush_dpb(AVCodecContext *avctx){
1498
    H264Context *h= avctx->priv_data;
1499
    int i;
1500
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1501
        if(h->delayed_pic[i])
1502
            h->delayed_pic[i]->reference= 0;
1503
        h->delayed_pic[i]= NULL;
1504
    }
1505
    h->outputed_poc= INT_MIN;
1506
    h->prev_interlaced_frame = 1;
1507
    idr(h);
1508
    if(h->s.current_picture_ptr)
1509
        h->s.current_picture_ptr->reference= 0;
1510
    h->s.first_field= 0;
1511
    ff_h264_reset_sei(h);
1512
    ff_mpeg_flush(avctx);
1513
}
1514

    
1515
static int init_poc(H264Context *h){
1516
    MpegEncContext * const s = &h->s;
1517
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1518
    int field_poc[2];
1519
    Picture *cur = s->current_picture_ptr;
1520

    
1521
    h->frame_num_offset= h->prev_frame_num_offset;
1522
    if(h->frame_num < h->prev_frame_num)
1523
        h->frame_num_offset += max_frame_num;
1524

    
1525
    if(h->sps.poc_type==0){
1526
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1527

    
1528
        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1529
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1530
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1531
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1532
        else
1533
            h->poc_msb = h->prev_poc_msb;
1534
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1535
        field_poc[0] =
1536
        field_poc[1] = h->poc_msb + h->poc_lsb;
1537
        if(s->picture_structure == PICT_FRAME)
1538
            field_poc[1] += h->delta_poc_bottom;
1539
    }else if(h->sps.poc_type==1){
1540
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1541
        int i;
1542

    
1543
        if(h->sps.poc_cycle_length != 0)
1544
            abs_frame_num = h->frame_num_offset + h->frame_num;
1545
        else
1546
            abs_frame_num = 0;
1547

    
1548
        if(h->nal_ref_idc==0 && abs_frame_num > 0)
1549
            abs_frame_num--;
1550

    
1551
        expected_delta_per_poc_cycle = 0;
1552
        for(i=0; i < h->sps.poc_cycle_length; i++)
1553
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1554

    
1555
        if(abs_frame_num > 0){
1556
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1557
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1558

    
1559
            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1560
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
1561
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1562
        } else
1563
            expectedpoc = 0;
1564

    
1565
        if(h->nal_ref_idc == 0)
1566
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1567

    
1568
        field_poc[0] = expectedpoc + h->delta_poc[0];
1569
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1570

    
1571
        if(s->picture_structure == PICT_FRAME)
1572
            field_poc[1] += h->delta_poc[1];
1573
    }else{
1574
        int poc= 2*(h->frame_num_offset + h->frame_num);
1575

    
1576
        if(!h->nal_ref_idc)
1577
            poc--;
1578

    
1579
        field_poc[0]= poc;
1580
        field_poc[1]= poc;
1581
    }
1582

    
1583
    if(s->picture_structure != PICT_BOTTOM_FIELD)
1584
        s->current_picture_ptr->field_poc[0]= field_poc[0];
1585
    if(s->picture_structure != PICT_TOP_FIELD)
1586
        s->current_picture_ptr->field_poc[1]= field_poc[1];
1587
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1588

    
1589
    return 0;
1590
}
1591

    
1592

    
1593
/**
1594
 * initialize scan tables
1595
 */
1596
static void init_scan_tables(H264Context *h){
1597
    int i;
1598
    if(h->h264dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
1599
        memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
1600
        memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
1601
    }else{
1602
        for(i=0; i<16; i++){
1603
#define T(x) (x>>2) | ((x<<2) & 0xF)
1604
            h->zigzag_scan[i] = T(zigzag_scan[i]);
1605
            h-> field_scan[i] = T( field_scan[i]);
1606
#undef T
1607
        }
1608
    }
1609
    if(h->h264dsp.h264_idct8_add == ff_h264_idct8_add_c){
1610
        memcpy(h->zigzag_scan8x8,       ff_zigzag_direct,     64*sizeof(uint8_t));
1611
        memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
1612
        memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
1613
        memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
1614
    }else{
1615
        for(i=0; i<64; i++){
1616
#define T(x) (x>>3) | ((x&7)<<3)
1617
            h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
1618
            h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1619
            h->field_scan8x8[i]        = T(field_scan8x8[i]);
1620
            h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
1621
#undef T
1622
        }
1623
    }
1624
    if(h->sps.transform_bypass){ //FIXME same ugly
1625
        h->zigzag_scan_q0          = zigzag_scan;
1626
        h->zigzag_scan8x8_q0       = ff_zigzag_direct;
1627
        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1628
        h->field_scan_q0           = field_scan;
1629
        h->field_scan8x8_q0        = field_scan8x8;
1630
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
1631
    }else{
1632
        h->zigzag_scan_q0          = h->zigzag_scan;
1633
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
1634
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1635
        h->field_scan_q0           = h->field_scan;
1636
        h->field_scan8x8_q0        = h->field_scan8x8;
1637
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
1638
    }
1639
}
1640

    
1641
static void field_end(H264Context *h){
1642
    MpegEncContext * const s = &h->s;
1643
    AVCodecContext * const avctx= s->avctx;
1644
    s->mb_y= 0;
1645

    
1646
    s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1647
    s->current_picture_ptr->pict_type= s->pict_type;
1648

    
1649
    if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1650
        ff_vdpau_h264_set_reference_frames(s);
1651

    
1652
    if(!s->dropable) {
1653
        ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1654
        h->prev_poc_msb= h->poc_msb;
1655
        h->prev_poc_lsb= h->poc_lsb;
1656
    }
1657
    h->prev_frame_num_offset= h->frame_num_offset;
1658
    h->prev_frame_num= h->frame_num;
1659

    
1660
    if (avctx->hwaccel) {
1661
        if (avctx->hwaccel->end_frame(avctx) < 0)
1662
            av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1663
    }
1664

    
1665
    if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1666
        ff_vdpau_h264_picture_complete(s);
1667

    
1668
    /*
1669
     * FIXME: Error handling code does not seem to support interlaced
1670
     * when slices span multiple rows
1671
     * The ff_er_add_slice calls don't work right for bottom
1672
     * fields; they cause massive erroneous error concealing
1673
     * Error marking covers both fields (top and bottom).
1674
     * This causes a mismatched s->error_count
1675
     * and a bad error table. Further, the error count goes to
1676
     * INT_MAX when called for bottom field, because mb_y is
1677
     * past end by one (callers fault) and resync_mb_y != 0
1678
     * causes problems for the first MB line, too.
1679
     */
1680
    if (!FIELD_PICTURE)
1681
        ff_er_frame_end(s);
1682

    
1683
    MPV_frame_end(s);
1684

    
1685
    h->current_slice=0;
1686
}
1687

    
1688
/**
1689
 * Replicate H264 "master" context to thread contexts.
1690
 */
1691
static void clone_slice(H264Context *dst, H264Context *src)
1692
{
1693
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
1694
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
1695
    dst->s.current_picture      = src->s.current_picture;
1696
    dst->s.linesize             = src->s.linesize;
1697
    dst->s.uvlinesize           = src->s.uvlinesize;
1698
    dst->s.first_field          = src->s.first_field;
1699

    
1700
    dst->prev_poc_msb           = src->prev_poc_msb;
1701
    dst->prev_poc_lsb           = src->prev_poc_lsb;
1702
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
1703
    dst->prev_frame_num         = src->prev_frame_num;
1704
    dst->short_ref_count        = src->short_ref_count;
1705

    
1706
    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
1707
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
1708
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1709
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
1710

    
1711
    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
1712
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
1713
}
1714

    
1715
/**
1716
 * decodes a slice header.
1717
 * This will also call MPV_common_init() and frame_start() as needed.
1718
 *
1719
 * @param h h264context
1720
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1721
 *
1722
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1723
 */
1724
static int decode_slice_header(H264Context *h, H264Context *h0){
1725
    MpegEncContext * const s = &h->s;
1726
    MpegEncContext * const s0 = &h0->s;
1727
    unsigned int first_mb_in_slice;
1728
    unsigned int pps_id;
1729
    int num_ref_idx_active_override_flag;
1730
    unsigned int slice_type, tmp, i, j;
1731
    int default_ref_list_done = 0;
1732
    int last_pic_structure;
1733

    
1734
    s->dropable= h->nal_ref_idc == 0;
1735

    
1736
    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1737
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1738
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1739
    }else{
1740
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1741
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1742
    }
1743

    
1744
    first_mb_in_slice= get_ue_golomb(&s->gb);
1745

    
1746
    if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1747
        if(h0->current_slice && FIELD_PICTURE){
1748
            field_end(h);
1749
        }
1750

    
1751
        h0->current_slice = 0;
1752
        if (!s0->first_field)
1753
            s->current_picture_ptr= NULL;
1754
    }
1755

    
1756
    slice_type= get_ue_golomb_31(&s->gb);
1757
    if(slice_type > 9){
1758
        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);
1759
        return -1;
1760
    }
1761
    if(slice_type > 4){
1762
        slice_type -= 5;
1763
        h->slice_type_fixed=1;
1764
    }else
1765
        h->slice_type_fixed=0;
1766

    
1767
    slice_type= golomb_to_pict_type[ slice_type ];
1768
    if (slice_type == FF_I_TYPE
1769
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1770
        default_ref_list_done = 1;
1771
    }
1772
    h->slice_type= slice_type;
1773
    h->slice_type_nos= slice_type & 3;
1774

    
1775
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1776

    
1777
    pps_id= get_ue_golomb(&s->gb);
1778
    if(pps_id>=MAX_PPS_COUNT){
1779
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1780
        return -1;
1781
    }
1782
    if(!h0->pps_buffers[pps_id]) {
1783
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1784
        return -1;
1785
    }
1786
    h->pps= *h0->pps_buffers[pps_id];
1787

    
1788
    if(!h0->sps_buffers[h->pps.sps_id]) {
1789
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1790
        return -1;
1791
    }
1792
    h->sps = *h0->sps_buffers[h->pps.sps_id];
1793

    
1794
    s->avctx->profile = h->sps.profile_idc;
1795
    s->avctx->level   = h->sps.level_idc;
1796
    s->avctx->refs    = h->sps.ref_frame_count;
1797

    
1798
    if(h == h0 && h->dequant_coeff_pps != pps_id){
1799
        h->dequant_coeff_pps = pps_id;
1800
        init_dequant_tables(h);
1801
    }
1802

    
1803
    s->mb_width= h->sps.mb_width;
1804
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1805

    
1806
    h->b_stride=  s->mb_width*4;
1807

    
1808
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1809
    if(h->sps.frame_mbs_only_flag)
1810
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1811
    else
1812
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
1813

    
1814
    if (s->context_initialized
1815
        && (   s->width != s->avctx->width || s->height != s->avctx->height
1816
            || av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
1817
        if(h != h0)
1818
            return -1;   // width / height changed during parallelized decoding
1819
        free_tables(h);
1820
        flush_dpb(s->avctx);
1821
        MPV_common_end(s);
1822
    }
1823
    if (!s->context_initialized) {
1824
        if(h != h0)
1825
            return -1;  // we cant (re-)initialize context during parallel decoding
1826

    
1827
        avcodec_set_dimensions(s->avctx, s->width, s->height);
1828
        s->avctx->sample_aspect_ratio= h->sps.sar;
1829
        if(!s->avctx->sample_aspect_ratio.den)
1830
            s->avctx->sample_aspect_ratio.den = 1;
1831

    
1832
        if(h->sps.video_signal_type_present_flag){
1833
            s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1834
            if(h->sps.colour_description_present_flag){
1835
                s->avctx->color_primaries = h->sps.color_primaries;
1836
                s->avctx->color_trc       = h->sps.color_trc;
1837
                s->avctx->colorspace      = h->sps.colorspace;
1838
            }
1839
        }
1840

    
1841
        if(h->sps.timing_info_present_flag){
1842
            int64_t den= h->sps.time_scale;
1843
            if(h->x264_build < 44U)
1844
                den *= 2;
1845
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1846
                      h->sps.num_units_in_tick, den, 1<<30);
1847
        }
1848
        s->avctx->pix_fmt = s->avctx->get_format(s->avctx,
1849
                                                 s->avctx->codec->pix_fmts ?
1850
                                                 s->avctx->codec->pix_fmts :
1851
                                                 s->avctx->color_range == AVCOL_RANGE_JPEG ?
1852
                                                 hwaccel_pixfmt_list_h264_jpeg_420 :
1853
                                                 ff_hwaccel_pixfmt_list_420);
1854
        s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1855

    
1856
        if (MPV_common_init(s) < 0)
1857
            return -1;
1858
        s->first_field = 0;
1859
        h->prev_interlaced_frame = 1;
1860

    
1861
        init_scan_tables(h);
1862
        ff_h264_alloc_tables(h);
1863

    
1864
        for(i = 1; i < s->avctx->thread_count; i++) {
1865
            H264Context *c;
1866
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1867
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1868
            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1869
            c->h264dsp = h->h264dsp;
1870
            c->sps = h->sps;
1871
            c->pps = h->pps;
1872
            init_scan_tables(c);
1873
            clone_tables(c, h, i);
1874
        }
1875

    
1876
        for(i = 0; i < s->avctx->thread_count; i++)
1877
            if(context_init(h->thread_context[i]) < 0)
1878
                return -1;
1879
    }
1880

    
1881
    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1882

    
1883
    h->mb_mbaff = 0;
1884
    h->mb_aff_frame = 0;
1885
    last_pic_structure = s0->picture_structure;
1886
    if(h->sps.frame_mbs_only_flag){
1887
        s->picture_structure= PICT_FRAME;
1888
    }else{
1889
        if(get_bits1(&s->gb)) { //field_pic_flag
1890
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1891
        } else {
1892
            s->picture_structure= PICT_FRAME;
1893
            h->mb_aff_frame = h->sps.mb_aff;
1894
        }
1895
    }
1896
    h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1897

    
1898
    if(h0->current_slice == 0){
1899
        while(h->frame_num !=  h->prev_frame_num &&
1900
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1901
            Picture *prev = h->short_ref_count ? h->short_ref[0] : NULL;
1902
            av_log(h->s.avctx, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1903
            if (ff_h264_frame_start(h) < 0)
1904
                return -1;
1905
            h->prev_frame_num++;
1906
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1907
            s->current_picture_ptr->frame_num= h->prev_frame_num;
1908
            ff_generate_sliding_window_mmcos(h);
1909
            ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1910
            /* Error concealment: if a ref is missing, copy the previous ref in its place.
1911
             * FIXME: avoiding a memcpy would be nice, but ref handling makes many assumptions
1912
             * about there being no actual duplicates.
1913
             * FIXME: this doesn't copy padding for out-of-frame motion vectors.  Given we're
1914
             * concealing a lost frame, this probably isn't noticable by comparison, but it should
1915
             * be fixed. */
1916
            if (h->short_ref_count) {
1917
                if (prev) {
1918
                    av_image_copy(h->short_ref[0]->data, h->short_ref[0]->linesize,
1919
                                  (const uint8_t**)prev->data, prev->linesize,
1920
                                  PIX_FMT_YUV420P, s->mb_width*16, s->mb_height*16);
1921
                    h->short_ref[0]->poc = prev->poc+2;
1922
                }
1923
                h->short_ref[0]->frame_num = h->prev_frame_num;
1924
            }
1925
        }
1926

    
1927
        /* See if we have a decoded first field looking for a pair... */
1928
        if (s0->first_field) {
1929
            assert(s0->current_picture_ptr);
1930
            assert(s0->current_picture_ptr->data[0]);
1931
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1932

    
1933
            /* figure out if we have a complementary field pair */
1934
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1935
                /*
1936
                 * Previous field is unmatched. Don't display it, but let it
1937
                 * remain for reference if marked as such.
1938
                 */
1939
                s0->current_picture_ptr = NULL;
1940
                s0->first_field = FIELD_PICTURE;
1941

    
1942
            } else {
1943
                if (h->nal_ref_idc &&
1944
                        s0->current_picture_ptr->reference &&
1945
                        s0->current_picture_ptr->frame_num != h->frame_num) {
1946
                    /*
1947
                     * This and previous field were reference, but had
1948
                     * different frame_nums. Consider this field first in
1949
                     * pair. Throw away previous field except for reference
1950
                     * purposes.
1951
                     */
1952
                    s0->first_field = 1;
1953
                    s0->current_picture_ptr = NULL;
1954

    
1955
                } else {
1956
                    /* Second field in complementary pair */
1957
                    s0->first_field = 0;
1958
                }
1959
            }
1960

    
1961
        } else {
1962
            /* Frame or first field in a potentially complementary pair */
1963
            assert(!s0->current_picture_ptr);
1964
            s0->first_field = FIELD_PICTURE;
1965
        }
1966

    
1967
        if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1968
            s0->first_field = 0;
1969
            return -1;
1970
        }
1971
    }
1972
    if(h != h0)
1973
        clone_slice(h, h0);
1974

    
1975
    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1976

    
1977
    assert(s->mb_num == s->mb_width * s->mb_height);
1978
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1979
       first_mb_in_slice                    >= s->mb_num){
1980
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1981
        return -1;
1982
    }
1983
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1984
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1985
    if (s->picture_structure == PICT_BOTTOM_FIELD)
1986
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
1987
    assert(s->mb_y < s->mb_height);
1988

    
1989
    if(s->picture_structure==PICT_FRAME){
1990
        h->curr_pic_num=   h->frame_num;
1991
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1992
    }else{
1993
        h->curr_pic_num= 2*h->frame_num + 1;
1994
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1995
    }
1996

    
1997
    if(h->nal_unit_type == NAL_IDR_SLICE){
1998
        get_ue_golomb(&s->gb); /* idr_pic_id */
1999
    }
2000

    
2001
    if(h->sps.poc_type==0){
2002
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
2003

    
2004
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
2005
            h->delta_poc_bottom= get_se_golomb(&s->gb);
2006
        }
2007
    }
2008

    
2009
    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
2010
        h->delta_poc[0]= get_se_golomb(&s->gb);
2011

    
2012
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
2013
            h->delta_poc[1]= get_se_golomb(&s->gb);
2014
    }
2015

    
2016
    init_poc(h);
2017

    
2018
    if(h->pps.redundant_pic_cnt_present){
2019
        h->redundant_pic_count= get_ue_golomb(&s->gb);
2020
    }
2021

    
2022
    //set defaults, might be overridden a few lines later
2023
    h->ref_count[0]= h->pps.ref_count[0];
2024
    h->ref_count[1]= h->pps.ref_count[1];
2025

    
2026
    if(h->slice_type_nos != FF_I_TYPE){
2027
        if(h->slice_type_nos == FF_B_TYPE){
2028
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
2029
        }
2030
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
2031

    
2032
        if(num_ref_idx_active_override_flag){
2033
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
2034
            if(h->slice_type_nos==FF_B_TYPE)
2035
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
2036

    
2037
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
2038
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
2039
                h->ref_count[0]= h->ref_count[1]= 1;
2040
                return -1;
2041
            }
2042
        }
2043
        if(h->slice_type_nos == FF_B_TYPE)
2044
            h->list_count= 2;
2045
        else
2046
            h->list_count= 1;
2047
    }else
2048
        h->list_count= 0;
2049

    
2050
    if(!default_ref_list_done){
2051
        ff_h264_fill_default_ref_list(h);
2052
    }
2053

    
2054
    if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
2055
        return -1;
2056

    
2057
    if(h->slice_type_nos!=FF_I_TYPE){
2058
        s->last_picture_ptr= &h->ref_list[0][0];
2059
        ff_copy_picture(&s->last_picture, s->last_picture_ptr);
2060
    }
2061
    if(h->slice_type_nos==FF_B_TYPE){
2062
        s->next_picture_ptr= &h->ref_list[1][0];
2063
        ff_copy_picture(&s->next_picture, s->next_picture_ptr);
2064
    }
2065

    
2066
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
2067
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
2068
        pred_weight_table(h);
2069
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
2070
        implicit_weight_table(h, -1);
2071
    }else {
2072
        h->use_weight = 0;
2073
        for (i = 0; i < 2; i++) {
2074
            h->luma_weight_flag[i]   = 0;
2075
            h->chroma_weight_flag[i] = 0;
2076
        }
2077
    }
2078

    
2079
    if(h->nal_ref_idc)
2080
        ff_h264_decode_ref_pic_marking(h0, &s->gb);
2081

    
2082
    if(FRAME_MBAFF){
2083
        ff_h264_fill_mbaff_ref_list(h);
2084

    
2085
        if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE){
2086
            implicit_weight_table(h, 0);
2087
            implicit_weight_table(h, 1);
2088
        }
2089
    }
2090

    
2091
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
2092
        ff_h264_direct_dist_scale_factor(h);
2093
    ff_h264_direct_ref_list_init(h);
2094

    
2095
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
2096
        tmp = get_ue_golomb_31(&s->gb);
2097
        if(tmp > 2){
2098
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
2099
            return -1;
2100
        }
2101
        h->cabac_init_idc= tmp;
2102
    }
2103

    
2104
    h->last_qscale_diff = 0;
2105
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2106
    if(tmp>51){
2107
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2108
        return -1;
2109
    }
2110
    s->qscale= tmp;
2111
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2112
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2113
    //FIXME qscale / qp ... stuff
2114
    if(h->slice_type == FF_SP_TYPE){
2115
        get_bits1(&s->gb); /* sp_for_switch_flag */
2116
    }
2117
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
2118
        get_se_golomb(&s->gb); /* slice_qs_delta */
2119
    }
2120

    
2121
    h->deblocking_filter = 1;
2122
    h->slice_alpha_c0_offset = 52;
2123
    h->slice_beta_offset = 52;
2124
    if( h->pps.deblocking_filter_parameters_present ) {
2125
        tmp= get_ue_golomb_31(&s->gb);
2126
        if(tmp > 2){
2127
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2128
            return -1;
2129
        }
2130
        h->deblocking_filter= tmp;
2131
        if(h->deblocking_filter < 2)
2132
            h->deblocking_filter^= 1; // 1<->0
2133

    
2134
        if( h->deblocking_filter ) {
2135
            h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2136
            h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
2137
            if(   h->slice_alpha_c0_offset > 104U
2138
               || h->slice_beta_offset     > 104U){
2139
                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);
2140
                return -1;
2141
            }
2142
        }
2143
    }
2144

    
2145
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
2146
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2147
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
2148
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2149
        h->deblocking_filter= 0;
2150

    
2151
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2152
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2153
            /* Cheat slightly for speed:
2154
               Do not bother to deblock across slices. */
2155
            h->deblocking_filter = 2;
2156
        } else {
2157
            h0->max_contexts = 1;
2158
            if(!h0->single_decode_warning) {
2159
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2160
                h0->single_decode_warning = 1;
2161
            }
2162
            if(h != h0)
2163
                return 1; // deblocking switched inside frame
2164
        }
2165
    }
2166
    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]);
2167

    
2168
#if 0 //FMO
2169
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2170
        slice_group_change_cycle= get_bits(&s->gb, ?);
2171
#endif
2172

    
2173
    h0->last_slice_type = slice_type;
2174
    h->slice_num = ++h0->current_slice;
2175
    if(h->slice_num >= MAX_SLICES){
2176
        av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2177
    }
2178

    
2179
    for(j=0; j<2; j++){
2180
        int id_list[16];
2181
        int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2182
        for(i=0; i<16; i++){
2183
            id_list[i]= 60;
2184
            if(h->ref_list[j][i].data[0]){
2185
                int k;
2186
                uint8_t *base= h->ref_list[j][i].base[0];
2187
                for(k=0; k<h->short_ref_count; k++)
2188
                    if(h->short_ref[k]->base[0] == base){
2189
                        id_list[i]= k;
2190
                        break;
2191
                    }
2192
                for(k=0; k<h->long_ref_count; k++)
2193
                    if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2194
                        id_list[i]= h->short_ref_count + k;
2195
                        break;
2196
                    }
2197
            }
2198
        }
2199

    
2200
        ref2frm[0]=
2201
        ref2frm[1]= -1;
2202
        for(i=0; i<16; i++)
2203
            ref2frm[i+2]= 4*id_list[i]
2204
                          +(h->ref_list[j][i].reference&3);
2205
        ref2frm[18+0]=
2206
        ref2frm[18+1]= -1;
2207
        for(i=16; i<48; i++)
2208
            ref2frm[i+4]= 4*id_list[(i-16)>>1]
2209
                          +(h->ref_list[j][i].reference&3);
2210
    }
2211

    
2212
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2213
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2214

    
2215
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2216
        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",
2217
               h->slice_num,
2218
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2219
               first_mb_in_slice,
2220
               av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2221
               pps_id, h->frame_num,
2222
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2223
               h->ref_count[0], h->ref_count[1],
2224
               s->qscale,
2225
               h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2226
               h->use_weight,
2227
               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2228
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2229
               );
2230
    }
2231

    
2232
    return 0;
2233
}
2234

    
2235
int ff_h264_get_slice_type(const H264Context *h)
2236
{
2237
    switch (h->slice_type) {
2238
    case FF_P_TYPE:  return 0;
2239
    case FF_B_TYPE:  return 1;
2240
    case FF_I_TYPE:  return 2;
2241
    case FF_SP_TYPE: return 3;
2242
    case FF_SI_TYPE: return 4;
2243
    default:         return -1;
2244
    }
2245
}
2246

    
2247
/**
2248
 *
2249
 * @return non zero if the loop filter can be skiped
2250
 */
2251
static int fill_filter_caches(H264Context *h, int mb_type){
2252
    MpegEncContext * const s = &h->s;
2253
    const int mb_xy= h->mb_xy;
2254
    int top_xy, left_xy[2];
2255
    int top_type, left_type[2];
2256

    
2257
    top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
2258

    
2259
    //FIXME deblocking could skip the intra and nnz parts.
2260

    
2261
    /* Wow, what a mess, why didn't they simplify the interlacing & intra
2262
     * stuff, I can't imagine that these complex rules are worth it. */
2263

    
2264
    left_xy[1] = left_xy[0] = mb_xy-1;
2265
    if(FRAME_MBAFF){
2266
        const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
2267
        const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
2268
        if(s->mb_y&1){
2269
            if (left_mb_field_flag != curr_mb_field_flag) {
2270
                left_xy[0] -= s->mb_stride;
2271
            }
2272
        }else{
2273
            if(curr_mb_field_flag){
2274
                top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
2275
            }
2276
            if (left_mb_field_flag != curr_mb_field_flag) {
2277
                left_xy[1] += s->mb_stride;
2278
            }
2279
        }
2280
    }
2281

    
2282
    h->top_mb_xy = top_xy;
2283
    h->left_mb_xy[0] = left_xy[0];
2284
    h->left_mb_xy[1] = left_xy[1];
2285
    {
2286
        //for sufficiently low qp, filtering wouldn't do anything
2287
        //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
2288
        int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
2289
        int qp = s->current_picture.qscale_table[mb_xy];
2290
        if(qp <= qp_thresh
2291
           && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
2292
           && (top_xy   < 0 || ((qp + s->current_picture.qscale_table[top_xy    ] + 1)>>1) <= qp_thresh)){
2293
            if(!FRAME_MBAFF)
2294
                return 1;
2295
            if(   (left_xy[0]< 0            || ((qp + s->current_picture.qscale_table[left_xy[1]             ] + 1)>>1) <= qp_thresh)
2296
               && (top_xy    < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy    -s->mb_stride] + 1)>>1) <= qp_thresh))
2297
                return 1;
2298
        }
2299
    }
2300

    
2301
    top_type     = s->current_picture.mb_type[top_xy]    ;
2302
    left_type[0] = s->current_picture.mb_type[left_xy[0]];
2303
    left_type[1] = s->current_picture.mb_type[left_xy[1]];
2304
    if(h->deblocking_filter == 2){
2305
        if(h->slice_table[top_xy     ] != h->slice_num) top_type= 0;
2306
        if(h->slice_table[left_xy[0] ] != h->slice_num) left_type[0]= left_type[1]= 0;
2307
    }else{
2308
        if(h->slice_table[top_xy     ] == 0xFFFF) top_type= 0;
2309
        if(h->slice_table[left_xy[0] ] == 0xFFFF) left_type[0]= left_type[1] =0;
2310
    }
2311
    h->top_type    = top_type    ;
2312
    h->left_type[0]= left_type[0];
2313
    h->left_type[1]= left_type[1];
2314

    
2315
    if(IS_INTRA(mb_type))
2316
        return 0;
2317

    
2318
    AV_COPY64(&h->non_zero_count_cache[0+8*1], &h->non_zero_count[mb_xy][ 0]);
2319
    AV_COPY64(&h->non_zero_count_cache[0+8*2], &h->non_zero_count[mb_xy][ 8]);
2320
    AV_COPY32(&h->non_zero_count_cache[0+8*5], &h->non_zero_count[mb_xy][16]);
2321
    AV_COPY32(&h->non_zero_count_cache[4+8*3], &h->non_zero_count[mb_xy][20]);
2322
    AV_COPY64(&h->non_zero_count_cache[0+8*4], &h->non_zero_count[mb_xy][24]);
2323

    
2324
    h->cbp= h->cbp_table[mb_xy];
2325

    
2326
    {
2327
        int list;
2328
        for(list=0; list<h->list_count; list++){
2329
            int8_t *ref;
2330
            int y, b_stride;
2331
            int16_t (*mv_dst)[2];
2332
            int16_t (*mv_src)[2];
2333

    
2334
            if(!USES_LIST(mb_type, list)){
2335
                fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
2336
                AV_WN32A(&h->ref_cache[list][scan8[ 0]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2337
                AV_WN32A(&h->ref_cache[list][scan8[ 2]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2338
                AV_WN32A(&h->ref_cache[list][scan8[ 8]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2339
                AV_WN32A(&h->ref_cache[list][scan8[10]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2340
                continue;
2341
            }
2342

    
2343
            ref = &s->current_picture.ref_index[list][4*mb_xy];
2344
            {
2345
                int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2346
                AV_WN32A(&h->ref_cache[list][scan8[ 0]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2347
                AV_WN32A(&h->ref_cache[list][scan8[ 2]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2348
                ref += 2;
2349
                AV_WN32A(&h->ref_cache[list][scan8[ 8]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2350
                AV_WN32A(&h->ref_cache[list][scan8[10]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
2351
            }
2352

    
2353
            b_stride = h->b_stride;
2354
            mv_dst   = &h->mv_cache[list][scan8[0]];
2355
            mv_src   = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
2356
            for(y=0; y<4; y++){
2357
                AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
2358
            }
2359

    
2360
        }
2361
    }
2362

    
2363

    
2364
/*
2365
0 . T T. T T T T
2366
1 L . .L . . . .
2367
2 L . .L . . . .
2368
3 . T TL . . . .
2369
4 L . .L . . . .
2370
5 L . .. . . . .
2371
*/
2372
//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
2373
    if(top_type){
2374
        AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][4+3*8]);
2375
    }
2376

    
2377
    if(left_type[0]){
2378
        h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][7+0*8];
2379
        h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][7+1*8];
2380
        h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][7+2*8];
2381
        h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][7+3*8];
2382
    }
2383

    
2384
    // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
2385
    if(!CABAC && h->pps.transform_8x8_mode){
2386
        if(IS_8x8DCT(top_type)){
2387
            h->non_zero_count_cache[4+8*0]=
2388
            h->non_zero_count_cache[5+8*0]= h->cbp_table[top_xy] & 4;
2389
            h->non_zero_count_cache[6+8*0]=
2390
            h->non_zero_count_cache[7+8*0]= h->cbp_table[top_xy] & 8;
2391
        }
2392
        if(IS_8x8DCT(left_type[0])){
2393
            h->non_zero_count_cache[3+8*1]=
2394
            h->non_zero_count_cache[3+8*2]= h->cbp_table[left_xy[0]]&2; //FIXME check MBAFF
2395
        }
2396
        if(IS_8x8DCT(left_type[1])){
2397
            h->non_zero_count_cache[3+8*3]=
2398
            h->non_zero_count_cache[3+8*4]= h->cbp_table[left_xy[1]]&8; //FIXME check MBAFF
2399
        }
2400

    
2401
        if(IS_8x8DCT(mb_type)){
2402
            h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
2403
            h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= h->cbp & 1;
2404

    
2405
            h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
2406
            h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
2407

    
2408
            h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
2409
            h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
2410

    
2411
            h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
2412
            h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
2413
        }
2414
    }
2415

    
2416
    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
2417
        int list;
2418
        for(list=0; list<h->list_count; list++){
2419
            if(USES_LIST(top_type, list)){
2420
                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
2421
                const int b8_xy= 4*top_xy + 2;
2422
                int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2423
                AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
2424
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
2425
                h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
2426
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
2427
                h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
2428
            }else{
2429
                AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
2430
                AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
2431
            }
2432

    
2433
            if(!IS_INTERLACED(mb_type^left_type[0])){
2434
                if(USES_LIST(left_type[0], list)){
2435
                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
2436
                    const int b8_xy= 4*left_xy[0] + 1;
2437
                    int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
2438
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 0 ], s->current_picture.motion_val[list][b_xy + h->b_stride*0]);
2439
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 8 ], s->current_picture.motion_val[list][b_xy + h->b_stride*1]);
2440
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 +16 ], s->current_picture.motion_val[list][b_xy + h->b_stride*2]);
2441
                    AV_COPY32(h->mv_cache[list][scan8[0] - 1 +24 ], s->current_picture.motion_val[list][b_xy + h->b_stride*3]);
2442
                    h->ref_cache[list][scan8[0] - 1 + 0 ]=
2443
                    h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*0]];
2444
                    h->ref_cache[list][scan8[0] - 1 +16 ]=
2445
                    h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*1]];
2446
                }else{
2447
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 0 ]);
2448
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 8 ]);
2449
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +16 ]);
2450
                    AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +24 ]);
2451
                    h->ref_cache[list][scan8[0] - 1 + 0  ]=
2452
                    h->ref_cache[list][scan8[0] - 1 + 8  ]=
2453
                    h->ref_cache[list][scan8[0] - 1 + 16 ]=
2454
                    h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
2455
                }
2456
            }
2457
        }
2458
    }
2459

    
2460
    return 0;
2461
}
2462

    
2463
static void loop_filter(H264Context *h){
2464
    MpegEncContext * const s = &h->s;
2465
    uint8_t  *dest_y, *dest_cb, *dest_cr;
2466
    int linesize, uvlinesize, mb_x, mb_y;
2467
    const int end_mb_y= s->mb_y + FRAME_MBAFF;
2468
    const int old_slice_type= h->slice_type;
2469

    
2470
    if(h->deblocking_filter) {
2471
        for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2472
            for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2473
                int mb_xy, mb_type;
2474
                mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2475
                h->slice_num= h->slice_table[mb_xy];
2476
                mb_type= s->current_picture.mb_type[mb_xy];
2477
                h->list_count= h->list_counts[mb_xy];
2478

    
2479
                if(FRAME_MBAFF)
2480
                    h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2481

    
2482
                s->mb_x= mb_x;
2483
                s->mb_y= mb_y;
2484
                dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2485
                dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2486
                dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2487
                    //FIXME simplify above
2488

    
2489
                if (MB_FIELD) {
2490
                    linesize   = h->mb_linesize   = s->linesize * 2;
2491
                    uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2492
                    if(mb_y&1){ //FIXME move out of this function?
2493
                        dest_y -= s->linesize*15;
2494
                        dest_cb-= s->uvlinesize*7;
2495
                        dest_cr-= s->uvlinesize*7;
2496
                    }
2497
                } else {
2498
                    linesize   = h->mb_linesize   = s->linesize;
2499
                    uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2500
                }
2501
                backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2502
                if(fill_filter_caches(h, mb_type))
2503
                    continue;
2504
                h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2505
                h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2506

    
2507
                if (FRAME_MBAFF) {
2508
                    ff_h264_filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2509
                } else {
2510
                    ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2511
                }
2512
            }
2513
        }
2514
    }
2515
    h->slice_type= old_slice_type;
2516
    s->mb_x= 0;
2517
    s->mb_y= end_mb_y - FRAME_MBAFF;
2518
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2519
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2520
}
2521

    
2522
static void predict_field_decoding_flag(H264Context *h){
2523
    MpegEncContext * const s = &h->s;
2524
    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
2525
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
2526
                ? s->current_picture.mb_type[mb_xy-1]
2527
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
2528
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
2529
                : 0;
2530
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
2531
}
2532

    
2533
static int decode_slice(struct AVCodecContext *avctx, void *arg){
2534
    H264Context *h = *(void**)arg;
2535
    MpegEncContext * const s = &h->s;
2536
    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2537

    
2538
    s->mb_skip_run= -1;
2539

    
2540
    h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2541
                    (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2542

    
2543
    if( h->pps.cabac ) {
2544
        /* realign */
2545
        align_get_bits( &s->gb );
2546

    
2547
        /* init cabac */
2548
        ff_init_cabac_states( &h->cabac);
2549
        ff_init_cabac_decoder( &h->cabac,
2550
                               s->gb.buffer + get_bits_count(&s->gb)/8,
2551
                               (get_bits_left(&s->gb) + 7)/8);
2552

    
2553
        ff_h264_init_cabac_states(h);
2554

    
2555
        for(;;){
2556
//START_TIMER
2557
            int ret = ff_h264_decode_mb_cabac(h);
2558
            int eos;
2559
//STOP_TIMER("decode_mb_cabac")
2560

    
2561
            if(ret>=0) ff_h264_hl_decode_mb(h);
2562

    
2563
            if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2564
                s->mb_y++;
2565

    
2566
                ret = ff_h264_decode_mb_cabac(h);
2567

    
2568
                if(ret>=0) ff_h264_hl_decode_mb(h);
2569
                s->mb_y--;
2570
            }
2571
            eos = get_cabac_terminate( &h->cabac );
2572

    
2573
            if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2574
                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);
2575
                return 0;
2576
            }
2577
            if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2578
                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);
2579
                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);
2580
                return -1;
2581
            }
2582

    
2583
            if( ++s->mb_x >= s->mb_width ) {
2584
                s->mb_x = 0;
2585
                loop_filter(h);
2586
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
2587
                ++s->mb_y;
2588
                if(FIELD_OR_MBAFF_PICTURE) {
2589
                    ++s->mb_y;
2590
                    if(FRAME_MBAFF && s->mb_y < s->mb_height)
2591
                        predict_field_decoding_flag(h);
2592
                }
2593
            }
2594

    
2595
            if( eos || s->mb_y >= s->mb_height ) {
2596
                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2597
                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);
2598
                return 0;
2599
            }
2600
        }
2601

    
2602
    } else {
2603
        for(;;){
2604
            int ret = ff_h264_decode_mb_cavlc(h);
2605

    
2606
            if(ret>=0) ff_h264_hl_decode_mb(h);
2607

    
2608
            if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2609
                s->mb_y++;
2610
                ret = ff_h264_decode_mb_cavlc(h);
2611

    
2612
                if(ret>=0) ff_h264_hl_decode_mb(h);
2613
                s->mb_y--;
2614
            }
2615

    
2616
            if(ret<0){
2617
                av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2618
                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);
2619

    
2620
                return -1;
2621
            }
2622

    
2623
            if(++s->mb_x >= s->mb_width){
2624
                s->mb_x=0;
2625
                loop_filter(h);
2626
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
2627
                ++s->mb_y;
2628
                if(FIELD_OR_MBAFF_PICTURE) {
2629
                    ++s->mb_y;
2630
                    if(FRAME_MBAFF && s->mb_y < s->mb_height)
2631
                        predict_field_decoding_flag(h);
2632
                }
2633
                if(s->mb_y >= s->mb_height){
2634
                    tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2635

    
2636
                    if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2637
                        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);
2638

    
2639
                        return 0;
2640
                    }else{
2641
                        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);
2642

    
2643
                        return -1;
2644
                    }
2645
                }
2646
            }
2647

    
2648
            if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2649
                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2650
                if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2651
                    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);
2652

    
2653
                    return 0;
2654
                }else{
2655
                    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);
2656

    
2657
                    return -1;
2658
                }
2659
            }
2660
        }
2661
    }
2662

    
2663
#if 0
2664
    for(;s->mb_y < s->mb_height; s->mb_y++){
2665
        for(;s->mb_x < s->mb_width; s->mb_x++){
2666
            int ret= decode_mb(h);
2667

2668
            ff_h264_hl_decode_mb(h);
2669

2670
            if(ret<0){
2671
                av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2672
                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);
2673

2674
                return -1;
2675
            }
2676

2677
            if(++s->mb_x >= s->mb_width){
2678
                s->mb_x=0;
2679
                if(++s->mb_y >= s->mb_height){
2680
                    if(get_bits_count(s->gb) == s->gb.size_in_bits){
2681
                        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);
2682

2683
                        return 0;
2684
                    }else{
2685
                        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);
2686

2687
                        return -1;
2688
                    }
2689
                }
2690
            }
2691

2692
            if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2693
                if(get_bits_count(s->gb) == s->gb.size_in_bits){
2694
                    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);
2695

2696
                    return 0;
2697
                }else{
2698
                    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);
2699

2700
                    return -1;
2701
                }
2702
            }
2703
        }
2704
        s->mb_x=0;
2705
        ff_draw_horiz_band(s, 16*s->mb_y, 16);
2706
    }
2707
#endif
2708
    return -1; //not reached
2709
}
2710

    
2711
/**
2712
 * Call decode_slice() for each context.
2713
 *
2714
 * @param h h264 master context
2715
 * @param context_count number of contexts to execute
2716
 */
2717
static void execute_decode_slices(H264Context *h, int context_count){
2718
    MpegEncContext * const s = &h->s;
2719
    AVCodecContext * const avctx= s->avctx;
2720
    H264Context *hx;
2721
    int i;
2722

    
2723
    if (s->avctx->hwaccel)
2724
        return;
2725
    if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2726
        return;
2727
    if(context_count == 1) {
2728
        decode_slice(avctx, &h);
2729
    } else {
2730
        for(i = 1; i < context_count; i++) {
2731
            hx = h->thread_context[i];
2732
            hx->s.error_recognition = avctx->error_recognition;
2733
            hx->s.error_count = 0;
2734
        }
2735

    
2736
        avctx->execute(avctx, (void *)decode_slice,
2737
                       h->thread_context, NULL, context_count, sizeof(void*));
2738

    
2739
        /* pull back stuff from slices to master context */
2740
        hx = h->thread_context[context_count - 1];
2741
        s->mb_x = hx->s.mb_x;
2742
        s->mb_y = hx->s.mb_y;
2743
        s->dropable = hx->s.dropable;
2744
        s->picture_structure = hx->s.picture_structure;
2745
        for(i = 1; i < context_count; i++)
2746
            h->s.error_count += h->thread_context[i]->s.error_count;
2747
    }
2748
}
2749

    
2750

    
2751
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2752
    MpegEncContext * const s = &h->s;
2753
    AVCodecContext * const avctx= s->avctx;
2754
    int buf_index=0;
2755
    H264Context *hx; ///< thread context
2756
    int context_count = 0;
2757
    int next_avc= h->is_avc ? 0 : buf_size;
2758

    
2759
    h->max_contexts = avctx->thread_count;
2760
#if 0
2761
    int i;
2762
    for(i=0; i<50; i++){
2763
        av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2764
    }
2765
#endif
2766
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2767
        h->current_slice = 0;
2768
        if (!s->first_field)
2769
            s->current_picture_ptr= NULL;
2770
        ff_h264_reset_sei(h);
2771
    }
2772

    
2773
    for(;;){
2774
        int consumed;
2775
        int dst_length;
2776
        int bit_length;
2777
        const uint8_t *ptr;
2778
        int i, nalsize = 0;
2779
        int err;
2780

    
2781
        if(buf_index >= next_avc) {
2782
            if(buf_index >= buf_size) break;
2783
            nalsize = 0;
2784
            for(i = 0; i < h->nal_length_size; i++)
2785
                nalsize = (nalsize << 8) | buf[buf_index++];
2786
            if(nalsize <= 1 || nalsize > buf_size - buf_index){
2787
                if(nalsize == 1){
2788
                    buf_index++;
2789
                    continue;
2790
                }else{
2791
                    av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2792
                    break;
2793
                }
2794
            }
2795
            next_avc= buf_index + nalsize;
2796
        } else {
2797
            // start code prefix search
2798
            for(; buf_index + 3 < next_avc; buf_index++){
2799
                // This should always succeed in the first iteration.
2800
                if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2801
                    break;
2802
            }
2803

    
2804
            if(buf_index+3 >= buf_size) break;
2805

    
2806
            buf_index+=3;
2807
            if(buf_index >= next_avc) continue;
2808
        }
2809

    
2810
        hx = h->thread_context[context_count];
2811

    
2812
        ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2813
        if (ptr==NULL || dst_length < 0){
2814
            return -1;
2815
        }
2816
        i= buf_index + consumed;
2817
        if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2818
           buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2819
            s->workaround_bugs |= FF_BUG_TRUNCATED;
2820

    
2821
        if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2822
        while(ptr[dst_length - 1] == 0 && dst_length > 0)
2823
            dst_length--;
2824
        }
2825
        bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2826

    
2827
        if(s->avctx->debug&FF_DEBUG_STARTCODE){
2828
            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);
2829
        }
2830

    
2831
        if (h->is_avc && (nalsize != consumed) && nalsize){
2832
            av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2833
        }
2834

    
2835
        buf_index += consumed;
2836

    
2837
        if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
2838
           ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
2839
            continue;
2840

    
2841
      again:
2842
        err = 0;
2843
        switch(hx->nal_unit_type){
2844
        case NAL_IDR_SLICE:
2845
            if (h->nal_unit_type != NAL_IDR_SLICE) {
2846
                av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2847
                return -1;
2848
            }
2849
            idr(h); //FIXME ensure we don't loose some frames if there is reordering
2850
        case NAL_SLICE:
2851
            init_get_bits(&hx->s.gb, ptr, bit_length);
2852
            hx->intra_gb_ptr=
2853
            hx->inter_gb_ptr= &hx->s.gb;
2854
            hx->s.data_partitioning = 0;
2855

    
2856
            if((err = decode_slice_header(hx, h)))
2857
               break;
2858

    
2859
            if (h->current_slice == 1) {
2860
                if (s->avctx->hwaccel && s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2861
                    return -1;
2862
                if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2863
                    ff_vdpau_h264_picture_start(s);
2864
            }
2865

    
2866
            s->current_picture_ptr->key_frame |=
2867
                    (hx->nal_unit_type == NAL_IDR_SLICE) ||
2868
                    (h->sei_recovery_frame_cnt >= 0);
2869
            if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2870
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2871
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2872
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2873
               && avctx->skip_frame < AVDISCARD_ALL){
2874
                if(avctx->hwaccel) {
2875
                    if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2876
                        return -1;
2877
                }else
2878
                if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2879
                    static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2880
                    ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2881
                    ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2882
                }else
2883
                    context_count++;
2884
            }
2885
            break;
2886
        case NAL_DPA:
2887
            init_get_bits(&hx->s.gb, ptr, bit_length);
2888
            hx->intra_gb_ptr=
2889
            hx->inter_gb_ptr= NULL;
2890

    
2891
            if ((err = decode_slice_header(hx, h)) < 0)
2892
                break;
2893

    
2894
            hx->s.data_partitioning = 1;
2895

    
2896
            break;
2897
        case NAL_DPB:
2898
            init_get_bits(&hx->intra_gb, ptr, bit_length);
2899
            hx->intra_gb_ptr= &hx->intra_gb;
2900
            break;
2901
        case NAL_DPC:
2902
            init_get_bits(&hx->inter_gb, ptr, bit_length);
2903
            hx->inter_gb_ptr= &hx->inter_gb;
2904

    
2905
            if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2906
               && s->context_initialized
2907
               && s->hurry_up < 5
2908
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2909
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
2910
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2911
               && avctx->skip_frame < AVDISCARD_ALL)
2912
                context_count++;
2913
            break;
2914
        case NAL_SEI:
2915
            init_get_bits(&s->gb, ptr, bit_length);
2916
            ff_h264_decode_sei(h);
2917
            break;
2918
        case NAL_SPS:
2919
            init_get_bits(&s->gb, ptr, bit_length);
2920
            ff_h264_decode_seq_parameter_set(h);
2921

    
2922
            if(s->flags& CODEC_FLAG_LOW_DELAY)
2923
                s->low_delay=1;
2924

    
2925
            if(avctx->has_b_frames < 2)
2926
                avctx->has_b_frames= !s->low_delay;
2927
            break;
2928
        case NAL_PPS:
2929
            init_get_bits(&s->gb, ptr, bit_length);
2930

    
2931
            ff_h264_decode_picture_parameter_set(h, bit_length);
2932

    
2933
            break;
2934
        case NAL_AUD:
2935
        case NAL_END_SEQUENCE:
2936
        case NAL_END_STREAM:
2937
        case NAL_FILLER_DATA:
2938
        case NAL_SPS_EXT:
2939
        case NAL_AUXILIARY_SLICE:
2940
            break;
2941
        default:
2942
            av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2943
        }
2944

    
2945
        if(context_count == h->max_contexts) {
2946
            execute_decode_slices(h, context_count);
2947
            context_count = 0;
2948
        }
2949

    
2950
        if (err < 0)
2951
            av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2952
        else if(err == 1) {
2953
            /* Slice could not be decoded in parallel mode, copy down
2954
             * NAL unit stuff to context 0 and restart. Note that
2955
             * rbsp_buffer is not transferred, but since we no longer
2956
             * run in parallel mode this should not be an issue. */
2957
            h->nal_unit_type = hx->nal_unit_type;
2958
            h->nal_ref_idc   = hx->nal_ref_idc;
2959
            hx = h;
2960
            goto again;
2961
        }
2962
    }
2963
    if(context_count)
2964
        execute_decode_slices(h, context_count);
2965
    return buf_index;
2966
}
2967

    
2968
/**
2969
 * returns the number of bytes consumed for building the current frame
2970
 */
2971
static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2972
        if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2973
        if(pos+10>buf_size) pos=buf_size; // oops ;)
2974

    
2975
        return pos;
2976
}
2977

    
2978
static int decode_frame(AVCodecContext *avctx,
2979
                             void *data, int *data_size,
2980
                             AVPacket *avpkt)
2981
{
2982
    const uint8_t *buf = avpkt->data;
2983
    int buf_size = avpkt->size;
2984
    H264Context *h = avctx->priv_data;
2985
    MpegEncContext *s = &h->s;
2986
    AVFrame *pict = data;
2987
    int buf_index;
2988

    
2989
    s->flags= avctx->flags;
2990
    s->flags2= avctx->flags2;
2991

    
2992
   /* end of stream, output what is still in the buffers */
2993
    if (buf_size == 0) {
2994
        Picture *out;
2995
        int i, out_idx;
2996

    
2997
//FIXME factorize this with the output code below
2998
        out = h->delayed_pic[0];
2999
        out_idx = 0;
3000
        for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
3001
            if(h->delayed_pic[i]->poc < out->poc){
3002
                out = h->delayed_pic[i];
3003
                out_idx = i;
3004
            }
3005

    
3006
        for(i=out_idx; h->delayed_pic[i]; i++)
3007
            h->delayed_pic[i] = h->delayed_pic[i+1];
3008

    
3009
        if(out){
3010
            *data_size = sizeof(AVFrame);
3011
            *pict= *(AVFrame*)out;
3012
        }
3013

    
3014
        return 0;
3015
    }
3016

    
3017
    buf_index=decode_nal_units(h, buf, buf_size);
3018
    if(buf_index < 0)
3019
        return -1;
3020

    
3021
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
3022
        if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
3023
        av_log(avctx, AV_LOG_ERROR, "no frame!\n");
3024
        return -1;
3025
    }
3026

    
3027
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
3028
        Picture *out = s->current_picture_ptr;
3029
        Picture *cur = s->current_picture_ptr;
3030
        int i, pics, out_of_order, out_idx;
3031

    
3032
        field_end(h);
3033

    
3034
        if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
3035
            /* Wait for second field. */
3036
            *data_size = 0;
3037

    
3038
        } else {
3039
            cur->interlaced_frame = 0;
3040
            cur->repeat_pict = 0;
3041

    
3042
            /* Signal interlacing information externally. */
3043
            /* Prioritize picture timing SEI information over used decoding process if it exists. */
3044

    
3045
            if(h->sps.pic_struct_present_flag){
3046
                switch (h->sei_pic_struct)
3047
                {
3048
                case SEI_PIC_STRUCT_FRAME:
3049
                    break;
3050
                case SEI_PIC_STRUCT_TOP_FIELD:
3051
                case SEI_PIC_STRUCT_BOTTOM_FIELD:
3052
                    cur->interlaced_frame = 1;
3053
                    break;
3054
                case SEI_PIC_STRUCT_TOP_BOTTOM:
3055
                case SEI_PIC_STRUCT_BOTTOM_TOP:
3056
                    if (FIELD_OR_MBAFF_PICTURE)
3057
                        cur->interlaced_frame = 1;
3058
                    else
3059
                        // try to flag soft telecine progressive
3060
                        cur->interlaced_frame = h->prev_interlaced_frame;
3061
                    break;
3062
                case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
3063
                case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
3064
                    // Signal the possibility of telecined film externally (pic_struct 5,6)
3065
                    // From these hints, let the applications decide if they apply deinterlacing.
3066
                    cur->repeat_pict = 1;
3067
                    break;
3068
                case SEI_PIC_STRUCT_FRAME_DOUBLING:
3069
                    // Force progressive here, as doubling interlaced frame is a bad idea.
3070
                    cur->repeat_pict = 2;
3071
                    break;
3072
                case SEI_PIC_STRUCT_FRAME_TRIPLING:
3073
                    cur->repeat_pict = 4;
3074
                    break;
3075
                }
3076

    
3077
                if ((h->sei_ct_type & 3) && h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
3078
                    cur->interlaced_frame = (h->sei_ct_type & (1<<1)) != 0;
3079
            }else{
3080
                /* Derive interlacing flag from used decoding process. */
3081
                cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
3082
            }
3083
            h->prev_interlaced_frame = cur->interlaced_frame;
3084

    
3085
            if (cur->field_poc[0] != cur->field_poc[1]){
3086
                /* Derive top_field_first from field pocs. */
3087
                cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
3088
            }else{
3089
                if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
3090
                    /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
3091
                    if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
3092
                      || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
3093
                        cur->top_field_first = 1;
3094
                    else
3095
                        cur->top_field_first = 0;
3096
                }else{
3097
                    /* Most likely progressive */
3098
                    cur->top_field_first = 0;
3099
                }
3100
            }
3101

    
3102
        //FIXME do something with unavailable reference frames
3103

    
3104
            /* Sort B-frames into display order */
3105

    
3106
            if(h->sps.bitstream_restriction_flag
3107
               && s->avctx->has_b_frames < h->sps.num_reorder_frames){
3108
                s->avctx->has_b_frames = h->sps.num_reorder_frames;
3109
                s->low_delay = 0;
3110
            }
3111

    
3112
            if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
3113
               && !h->sps.bitstream_restriction_flag){
3114
                s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
3115
                s->low_delay= 0;
3116
            }
3117

    
3118
            pics = 0;
3119
            while(h->delayed_pic[pics]) pics++;
3120

    
3121
            assert(pics <= MAX_DELAYED_PIC_COUNT);
3122

    
3123
            h->delayed_pic[pics++] = cur;
3124
            if(cur->reference == 0)
3125
                cur->reference = DELAYED_PIC_REF;
3126

    
3127
            out = h->delayed_pic[0];
3128
            out_idx = 0;
3129
            for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
3130
                if(h->delayed_pic[i]->poc < out->poc){
3131
                    out = h->delayed_pic[i];
3132
                    out_idx = i;
3133
                }
3134
            if(s->avctx->has_b_frames == 0 && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset))
3135
                h->outputed_poc= INT_MIN;
3136
            out_of_order = out->poc < h->outputed_poc;
3137

    
3138
            if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
3139
                { }
3140
            else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
3141
               || (s->low_delay &&
3142
                ((h->outputed_poc != INT_MIN && out->poc > h->outputed_poc + 2)
3143
                 || cur->pict_type == FF_B_TYPE)))
3144
            {
3145
                s->low_delay = 0;
3146
                s->avctx->has_b_frames++;
3147
            }
3148

    
3149
            if(out_of_order || pics > s->avctx->has_b_frames){
3150
                out->reference &= ~DELAYED_PIC_REF;
3151
                for(i=out_idx; h->delayed_pic[i]; i++)
3152
                    h->delayed_pic[i] = h->delayed_pic[i+1];
3153
            }
3154
            if(!out_of_order && pics > s->avctx->has_b_frames){
3155
                *data_size = sizeof(AVFrame);
3156

    
3157
                if(out_idx==0 && h->delayed_pic[0] && (h->delayed_pic[0]->key_frame || h->delayed_pic[0]->mmco_reset)) {
3158
                    h->outputed_poc = INT_MIN;
3159
                } else
3160
                    h->outputed_poc = out->poc;
3161
                *pict= *(AVFrame*)out;
3162
            }else{
3163
                av_log(avctx, AV_LOG_DEBUG, "no picture\n");
3164
            }
3165
        }
3166
    }
3167

    
3168
    assert(pict->data[0] || !*data_size);
3169
    ff_print_debug_info(s, pict);
3170
//printf("out %d\n", (int)pict->data[0]);
3171

    
3172
    return get_consumed_bytes(s, buf_index, buf_size);
3173
}
3174
#if 0
3175
static inline void fill_mb_avail(H264Context *h){
3176
    MpegEncContext * const s = &h->s;
3177
    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
3178

3179
    if(s->mb_y){
3180
        h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
3181
        h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
3182
        h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
3183
    }else{
3184
        h->mb_avail[0]=
3185
        h->mb_avail[1]=
3186
        h->mb_avail[2]= 0;
3187
    }
3188
    h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
3189
    h->mb_avail[4]= 1; //FIXME move out
3190
    h->mb_avail[5]= 0; //FIXME move out
3191
}
3192
#endif
3193

    
3194
#ifdef TEST
3195
#undef printf
3196
#undef random
3197
#define COUNT 8000
3198
#define SIZE (COUNT*40)
3199
int main(void){
3200
    int i;
3201
    uint8_t temp[SIZE];
3202
    PutBitContext pb;
3203
    GetBitContext gb;
3204
//    int int_temp[10000];
3205
    DSPContext dsp;
3206
    AVCodecContext avctx;
3207

    
3208
    dsputil_init(&dsp, &avctx);
3209

    
3210
    init_put_bits(&pb, temp, SIZE);
3211
    printf("testing unsigned exp golomb\n");
3212
    for(i=0; i<COUNT; i++){
3213
        START_TIMER
3214
        set_ue_golomb(&pb, i);
3215
        STOP_TIMER("set_ue_golomb");
3216
    }
3217
    flush_put_bits(&pb);
3218

    
3219
    init_get_bits(&gb, temp, 8*SIZE);
3220
    for(i=0; i<COUNT; i++){
3221
        int j, s;
3222

    
3223
        s= show_bits(&gb, 24);
3224

    
3225
        START_TIMER
3226
        j= get_ue_golomb(&gb);
3227
        if(j != i){
3228
            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3229
//            return -1;
3230
        }
3231
        STOP_TIMER("get_ue_golomb");
3232
    }
3233

    
3234

    
3235
    init_put_bits(&pb, temp, SIZE);
3236
    printf("testing signed exp golomb\n");
3237
    for(i=0; i<COUNT; i++){
3238
        START_TIMER
3239
        set_se_golomb(&pb, i - COUNT/2);
3240
        STOP_TIMER("set_se_golomb");
3241
    }
3242
    flush_put_bits(&pb);
3243

    
3244
    init_get_bits(&gb, temp, 8*SIZE);
3245
    for(i=0; i<COUNT; i++){
3246
        int j, s;
3247

    
3248
        s= show_bits(&gb, 24);
3249

    
3250
        START_TIMER
3251
        j= get_se_golomb(&gb);
3252
        if(j != i - COUNT/2){
3253
            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
3254
//            return -1;
3255
        }
3256
        STOP_TIMER("get_se_golomb");
3257
    }
3258

    
3259
#if 0
3260
    printf("testing 4x4 (I)DCT\n");
3261

3262
    DCTELEM block[16];
3263
    uint8_t src[16], ref[16];
3264
    uint64_t error= 0, max_error=0;
3265

3266
    for(i=0; i<COUNT; i++){
3267
        int j;
3268
//        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
3269
        for(j=0; j<16; j++){
3270
            ref[j]= random()%255;
3271
            src[j]= random()%255;
3272
        }
3273

3274
        h264_diff_dct_c(block, src, ref, 4);
3275

3276
        //normalize
3277
        for(j=0; j<16; j++){
3278
//            printf("%d ", block[j]);
3279
            block[j]= block[j]*4;
3280
            if(j&1) block[j]= (block[j]*4 + 2)/5;
3281
            if(j&4) block[j]= (block[j]*4 + 2)/5;
3282
        }
3283
//        printf("\n");
3284

3285
        h->h264dsp.h264_idct_add(ref, block, 4);
3286
/*        for(j=0; j<16; j++){
3287
            printf("%d ", ref[j]);
3288
        }
3289
        printf("\n");*/
3290

3291
        for(j=0; j<16; j++){
3292
            int diff= FFABS(src[j] - ref[j]);
3293

3294
            error+= diff*diff;
3295
            max_error= FFMAX(max_error, diff);
3296
        }
3297
    }
3298
    printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
3299
    printf("testing quantizer\n");
3300
    for(qp=0; qp<52; qp++){
3301
        for(i=0; i<16; i++)
3302
            src1_block[i]= src2_block[i]= random()%255;
3303

3304
    }
3305
    printf("Testing NAL layer\n");
3306

3307
    uint8_t bitstream[COUNT];
3308
    uint8_t nal[COUNT*2];
3309
    H264Context h;
3310
    memset(&h, 0, sizeof(H264Context));
3311

3312
    for(i=0; i<COUNT; i++){
3313
        int zeros= i;
3314
        int nal_length;
3315
        int consumed;
3316
        int out_length;
3317
        uint8_t *out;
3318
        int j;
3319

3320
        for(j=0; j<COUNT; j++){
3321
            bitstream[j]= (random() % 255) + 1;
3322
        }
3323

3324
        for(j=0; j<zeros; j++){
3325
            int pos= random() % COUNT;
3326
            while(bitstream[pos] == 0){
3327
                pos++;
3328
                pos %= COUNT;
3329
            }
3330
            bitstream[pos]=0;
3331
        }
3332

3333
        START_TIMER
3334

3335
        nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
3336
        if(nal_length<0){
3337
            printf("encoding failed\n");
3338
            return -1;
3339
        }
3340

3341
        out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
3342

3343
        STOP_TIMER("NAL")
3344

3345
        if(out_length != COUNT){
3346
            printf("incorrect length %d %d\n", out_length, COUNT);
3347
            return -1;
3348
        }
3349

3350
        if(consumed != nal_length){
3351
            printf("incorrect consumed length %d %d\n", nal_length, consumed);
3352
            return -1;
3353
        }
3354

3355
        if(memcmp(bitstream, out, COUNT)){
3356
            printf("mismatch\n");
3357
            return -1;
3358
        }
3359
    }
3360
#endif
3361

    
3362
    printf("Testing RBSP\n");
3363

    
3364

    
3365
    return 0;
3366
}
3367
#endif /* TEST */
3368

    
3369

    
3370
av_cold void ff_h264_free_context(H264Context *h)
3371
{
3372
    int i;
3373

    
3374
    free_tables(h); //FIXME cleanup init stuff perhaps
3375

    
3376
    for(i = 0; i < MAX_SPS_COUNT; i++)
3377
        av_freep(h->sps_buffers + i);
3378

    
3379
    for(i = 0; i < MAX_PPS_COUNT; i++)
3380
        av_freep(h->pps_buffers + i);
3381
}
3382

    
3383
av_cold int ff_h264_decode_end(AVCodecContext *avctx)
3384
{
3385
    H264Context *h = avctx->priv_data;
3386
    MpegEncContext *s = &h->s;
3387

    
3388
    ff_h264_free_context(h);
3389

    
3390
    MPV_common_end(s);
3391

    
3392
//    memset(h, 0, sizeof(H264Context));
3393

    
3394
    return 0;
3395
}
3396

    
3397

    
3398
AVCodec h264_decoder = {
3399
    "h264",
3400
    AVMEDIA_TYPE_VIDEO,
3401
    CODEC_ID_H264,
3402
    sizeof(H264Context),
3403
    ff_h264_decode_init,
3404
    NULL,
3405
    ff_h264_decode_end,
3406
    decode_frame,
3407
    /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
3408
    .flush= flush_dpb,
3409
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
3410
};
3411

    
3412
#if CONFIG_H264_VDPAU_DECODER
3413
AVCodec h264_vdpau_decoder = {
3414
    "h264_vdpau",
3415
    AVMEDIA_TYPE_VIDEO,
3416
    CODEC_ID_H264,
3417
    sizeof(H264Context),
3418
    ff_h264_decode_init,
3419
    NULL,
3420
    ff_h264_decode_end,
3421
    decode_frame,
3422
    CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
3423
    .flush= flush_dpb,
3424
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
3425
    .pix_fmts = (const enum PixelFormat[]){PIX_FMT_VDPAU_H264, PIX_FMT_NONE},
3426
};
3427
#endif