Drop if(0) code.
[libav.git] / libavcodec / h264.c
1 /*
2 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file libavcodec/h264.c
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28 #include "internal.h"
29 #include "dsputil.h"
30 #include "avcodec.h"
31 #include "mpegvideo.h"
32 #include "h264.h"
33 #include "h264data.h"
34 #include "h264_mvpred.h"
35 #include "h264_parser.h"
36 #include "golomb.h"
37 #include "mathops.h"
38 #include "rectangle.h"
39 #include "vdpau_internal.h"
40
41 #include "cabac.h"
42
43 //#undef NDEBUG
44 #include <assert.h>
45
46 static const uint8_t rem6[52]={
47 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,
48 };
49
50 static const uint8_t div6[52]={
51 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,
52 };
53
54 void ff_h264_write_back_intra_pred_mode(H264Context *h){
55 const int mb_xy= h->mb_xy;
56
57 h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
58 h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
59 h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
60 h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
61 h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
62 h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
63 h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
64 }
65
66 /**
67 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
68 */
69 int ff_h264_check_intra4x4_pred_mode(H264Context *h){
70 MpegEncContext * const s = &h->s;
71 static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
72 static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
73 int i;
74
75 if(!(h->top_samples_available&0x8000)){
76 for(i=0; i<4; i++){
77 int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
78 if(status<0){
79 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);
80 return -1;
81 } else if(status){
82 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
83 }
84 }
85 }
86
87 if((h->left_samples_available&0x8888)!=0x8888){
88 static const int mask[4]={0x8000,0x2000,0x80,0x20};
89 for(i=0; i<4; i++){
90 if(!(h->left_samples_available&mask[i])){
91 int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
92 if(status<0){
93 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);
94 return -1;
95 } else if(status){
96 h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
97 }
98 }
99 }
100 }
101
102 return 0;
103 } //FIXME cleanup like ff_h264_check_intra_pred_mode
104
105 /**
106 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
107 */
108 int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
109 MpegEncContext * const s = &h->s;
110 static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
111 static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
112
113 if(mode > 6U) {
114 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);
115 return -1;
116 }
117
118 if(!(h->top_samples_available&0x8000)){
119 mode= top[ mode ];
120 if(mode<0){
121 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);
122 return -1;
123 }
124 }
125
126 if((h->left_samples_available&0x8080) != 0x8080){
127 mode= left[ mode ];
128 if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
129 mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
130 }
131 if(mode<0){
132 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);
133 return -1;
134 }
135 }
136
137 return mode;
138 }
139
140 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
141 int i, si, di;
142 uint8_t *dst;
143 int bufidx;
144
145 // src[0]&0x80; //forbidden bit
146 h->nal_ref_idc= src[0]>>5;
147 h->nal_unit_type= src[0]&0x1F;
148
149 src++; length--;
150 #if 0
151 for(i=0; i<length; i++)
152 printf("%2X ", src[i]);
153 #endif
154
155 #if HAVE_FAST_UNALIGNED
156 # if HAVE_FAST_64BIT
157 # define RS 7
158 for(i=0; i+1<length; i+=9){
159 if(!((~*(const uint64_t*)(src+i) & (*(const uint64_t*)(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
160 # else
161 # define RS 3
162 for(i=0; i+1<length; i+=5){
163 if(!((~*(const uint32_t*)(src+i) & (*(const uint32_t*)(src+i) - 0x01000101U)) & 0x80008080U))
164 # endif
165 continue;
166 if(i>0 && !src[i]) i--;
167 while(src[i]) i++;
168 #else
169 # define RS 0
170 for(i=0; i+1<length; i+=2){
171 if(src[i]) continue;
172 if(i>0 && src[i-1]==0) i--;
173 #endif
174 if(i+2<length && src[i+1]==0 && src[i+2]<=3){
175 if(src[i+2]!=3){
176 /* startcode, so we must be past the end */
177 length=i;
178 }
179 break;
180 }
181 i-= RS;
182 }
183
184 if(i>=length-1){ //no escaped 0
185 *dst_length= length;
186 *consumed= length+1; //+1 for the header
187 return src;
188 }
189
190 bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
191 av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
192 dst= h->rbsp_buffer[bufidx];
193
194 if (dst == NULL){
195 return NULL;
196 }
197
198 //printf("decoding esc\n");
199 memcpy(dst, src, i);
200 si=di=i;
201 while(si+2<length){
202 //remove escapes (very rare 1:2^22)
203 if(src[si+2]>3){
204 dst[di++]= src[si++];
205 dst[di++]= src[si++];
206 }else if(src[si]==0 && src[si+1]==0){
207 if(src[si+2]==3){ //escape
208 dst[di++]= 0;
209 dst[di++]= 0;
210 si+=3;
211 continue;
212 }else //next start code
213 goto nsc;
214 }
215
216 dst[di++]= src[si++];
217 }
218 while(si<length)
219 dst[di++]= src[si++];
220 nsc:
221
222 memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
223
224 *dst_length= di;
225 *consumed= si + 1;//+1 for the header
226 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
227 return dst;
228 }
229
230 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
231 int v= *src;
232 int r;
233
234 tprintf(h->s.avctx, "rbsp trailing %X\n", v);
235
236 for(r=1; r<9; r++){
237 if(v&1) return r;
238 v>>=1;
239 }
240 return 0;
241 }
242
243 /**
244 * IDCT transforms the 16 dc values and dequantizes them.
245 * @param qp quantization parameter
246 */
247 static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
248 #define stride 16
249 int i;
250 int temp[16]; //FIXME check if this is a good idea
251 static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride};
252 static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
253
254 //memset(block, 64, 2*256);
255 //return;
256 for(i=0; i<4; i++){
257 const int offset= y_offset[i];
258 const int z0= block[offset+stride*0] + block[offset+stride*4];
259 const int z1= block[offset+stride*0] - block[offset+stride*4];
260 const int z2= block[offset+stride*1] - block[offset+stride*5];
261 const int z3= block[offset+stride*1] + block[offset+stride*5];
262
263 temp[4*i+0]= z0+z3;
264 temp[4*i+1]= z1+z2;
265 temp[4*i+2]= z1-z2;
266 temp[4*i+3]= z0-z3;
267 }
268
269 for(i=0; i<4; i++){
270 const int offset= x_offset[i];
271 const int z0= temp[4*0+i] + temp[4*2+i];
272 const int z1= temp[4*0+i] - temp[4*2+i];
273 const int z2= temp[4*1+i] - temp[4*3+i];
274 const int z3= temp[4*1+i] + temp[4*3+i];
275
276 block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
277 block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
278 block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
279 block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
280 }
281 }
282
283 #if 0
284 /**
285 * DCT transforms the 16 dc values.
286 * @param qp quantization parameter ??? FIXME
287 */
288 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
289 // const int qmul= dequant_coeff[qp][0];
290 int i;
291 int temp[16]; //FIXME check if this is a good idea
292 static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride};
293 static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
294
295 for(i=0; i<4; i++){
296 const int offset= y_offset[i];
297 const int z0= block[offset+stride*0] + block[offset+stride*4];
298 const int z1= block[offset+stride*0] - block[offset+stride*4];
299 const int z2= block[offset+stride*1] - block[offset+stride*5];
300 const int z3= block[offset+stride*1] + block[offset+stride*5];
301
302 temp[4*i+0]= z0+z3;
303 temp[4*i+1]= z1+z2;
304 temp[4*i+2]= z1-z2;
305 temp[4*i+3]= z0-z3;
306 }
307
308 for(i=0; i<4; i++){
309 const int offset= x_offset[i];
310 const int z0= temp[4*0+i] + temp[4*2+i];
311 const int z1= temp[4*0+i] - temp[4*2+i];
312 const int z2= temp[4*1+i] - temp[4*3+i];
313 const int z3= temp[4*1+i] + temp[4*3+i];
314
315 block[stride*0 +offset]= (z0 + z3)>>1;
316 block[stride*2 +offset]= (z1 + z2)>>1;
317 block[stride*8 +offset]= (z1 - z2)>>1;
318 block[stride*10+offset]= (z0 - z3)>>1;
319 }
320 }
321 #endif
322
323 #undef xStride
324 #undef stride
325
326 static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
327 const int stride= 16*2;
328 const int xStride= 16;
329 int a,b,c,d,e;
330
331 a= block[stride*0 + xStride*0];
332 b= block[stride*0 + xStride*1];
333 c= block[stride*1 + xStride*0];
334 d= block[stride*1 + xStride*1];
335
336 e= a-b;
337 a= a+b;
338 b= c-d;
339 c= c+d;
340
341 block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
342 block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
343 block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
344 block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
345 }
346
347 #if 0
348 static void chroma_dc_dct_c(DCTELEM *block){
349 const int stride= 16*2;
350 const int xStride= 16;
351 int a,b,c,d,e;
352
353 a= block[stride*0 + xStride*0];
354 b= block[stride*0 + xStride*1];
355 c= block[stride*1 + xStride*0];
356 d= block[stride*1 + xStride*1];
357
358 e= a-b;
359 a= a+b;
360 b= c-d;
361 c= c+d;
362
363 block[stride*0 + xStride*0]= (a+c);
364 block[stride*0 + xStride*1]= (e+b);
365 block[stride*1 + xStride*0]= (a-c);
366 block[stride*1 + xStride*1]= (e-b);
367 }
368 #endif
369
370 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
371 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
372 int src_x_offset, int src_y_offset,
373 qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
374 MpegEncContext * const s = &h->s;
375 const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
376 int my= h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
377 const int luma_xy= (mx&3) + ((my&3)<<2);
378 uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
379 uint8_t * src_cb, * src_cr;
380 int extra_width= h->emu_edge_width;
381 int extra_height= h->emu_edge_height;
382 int emu=0;
383 const int full_mx= mx>>2;
384 const int full_my= my>>2;
385 const int pic_width = 16*s->mb_width;
386 const int pic_height = 16*s->mb_height >> MB_FIELD;
387
388 if(mx&7) extra_width -= 3;
389 if(my&7) extra_height -= 3;
390
391 if( full_mx < 0-extra_width
392 || full_my < 0-extra_height
393 || full_mx + 16/*FIXME*/ > pic_width + extra_width
394 || full_my + 16/*FIXME*/ > pic_height + extra_height){
395 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);
396 src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
397 emu=1;
398 }
399
400 qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
401 if(!square){
402 qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
403 }
404
405 if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
406
407 if(MB_FIELD){
408 // chroma offset when predicting from a field of opposite parity
409 my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
410 emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
411 }
412 src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
413 src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
414
415 if(emu){
416 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);
417 src_cb= s->edge_emu_buffer;
418 }
419 chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
420
421 if(emu){
422 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);
423 src_cr= s->edge_emu_buffer;
424 }
425 chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
426 }
427
428 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
429 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
430 int x_offset, int y_offset,
431 qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
432 qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
433 int list0, int list1){
434 MpegEncContext * const s = &h->s;
435 qpel_mc_func *qpix_op= qpix_put;
436 h264_chroma_mc_func chroma_op= chroma_put;
437
438 dest_y += 2*x_offset + 2*y_offset*h-> mb_linesize;
439 dest_cb += x_offset + y_offset*h->mb_uvlinesize;
440 dest_cr += x_offset + y_offset*h->mb_uvlinesize;
441 x_offset += 8*s->mb_x;
442 y_offset += 8*(s->mb_y >> MB_FIELD);
443
444 if(list0){
445 Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
446 mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
447 dest_y, dest_cb, dest_cr, x_offset, y_offset,
448 qpix_op, chroma_op);
449
450 qpix_op= qpix_avg;
451 chroma_op= chroma_avg;
452 }
453
454 if(list1){
455 Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
456 mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
457 dest_y, dest_cb, dest_cr, x_offset, y_offset,
458 qpix_op, chroma_op);
459 }
460 }
461
462 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
463 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
464 int x_offset, int y_offset,
465 qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
466 h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
467 h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
468 int list0, int list1){
469 MpegEncContext * const s = &h->s;
470
471 dest_y += 2*x_offset + 2*y_offset*h-> mb_linesize;
472 dest_cb += x_offset + y_offset*h->mb_uvlinesize;
473 dest_cr += x_offset + y_offset*h->mb_uvlinesize;
474 x_offset += 8*s->mb_x;
475 y_offset += 8*(s->mb_y >> MB_FIELD);
476
477 if(list0 && list1){
478 /* don't optimize for luma-only case, since B-frames usually
479 * use implicit weights => chroma too. */
480 uint8_t *tmp_cb = s->obmc_scratchpad;
481 uint8_t *tmp_cr = s->obmc_scratchpad + 8;
482 uint8_t *tmp_y = s->obmc_scratchpad + 8*h->mb_uvlinesize;
483 int refn0 = h->ref_cache[0][ scan8[n] ];
484 int refn1 = h->ref_cache[1][ scan8[n] ];
485
486 mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
487 dest_y, dest_cb, dest_cr,
488 x_offset, y_offset, qpix_put, chroma_put);
489 mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
490 tmp_y, tmp_cb, tmp_cr,
491 x_offset, y_offset, qpix_put, chroma_put);
492
493 if(h->use_weight == 2){
494 int weight0 = h->implicit_weight[refn0][refn1];
495 int weight1 = 64 - weight0;
496 luma_weight_avg( dest_y, tmp_y, h-> mb_linesize, 5, weight0, weight1, 0);
497 chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
498 chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
499 }else{
500 luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
501 h->luma_weight[0][refn0], h->luma_weight[1][refn1],
502 h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
503 chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
504 h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
505 h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
506 chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
507 h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
508 h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
509 }
510 }else{
511 int list = list1 ? 1 : 0;
512 int refn = h->ref_cache[list][ scan8[n] ];
513 Picture *ref= &h->ref_list[list][refn];
514 mc_dir_part(h, ref, n, square, chroma_height, delta, list,
515 dest_y, dest_cb, dest_cr, x_offset, y_offset,
516 qpix_put, chroma_put);
517
518 luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
519 h->luma_weight[list][refn], h->luma_offset[list][refn]);
520 if(h->use_weight_chroma){
521 chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
522 h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
523 chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
524 h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
525 }
526 }
527 }
528
529 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
530 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
531 int x_offset, int y_offset,
532 qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
533 qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
534 h264_weight_func *weight_op, h264_biweight_func *weight_avg,
535 int list0, int list1){
536 if((h->use_weight==2 && list0 && list1
537 && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
538 || h->use_weight==1)
539 mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
540 x_offset, y_offset, qpix_put, chroma_put,
541 weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
542 else
543 mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
544 x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
545 }
546
547 static inline void prefetch_motion(H264Context *h, int list){
548 /* fetch pixels for estimated mv 4 macroblocks ahead
549 * optimized for 64byte cache lines */
550 MpegEncContext * const s = &h->s;
551 const int refn = h->ref_cache[list][scan8[0]];
552 if(refn >= 0){
553 const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
554 const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
555 uint8_t **src= h->ref_list[list][refn].data;
556 int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
557 s->dsp.prefetch(src[0]+off, s->linesize, 4);
558 off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
559 s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
560 }
561 }
562
563 static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
564 qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
565 qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
566 h264_weight_func *weight_op, h264_biweight_func *weight_avg){
567 MpegEncContext * const s = &h->s;
568 const int mb_xy= h->mb_xy;
569 const int mb_type= s->current_picture.mb_type[mb_xy];
570
571 assert(IS_INTER(mb_type));
572
573 prefetch_motion(h, 0);
574
575 if(IS_16X16(mb_type)){
576 mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
577 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
578 weight_op, weight_avg,
579 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
580 }else if(IS_16X8(mb_type)){
581 mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
582 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
583 &weight_op[1], &weight_avg[1],
584 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
585 mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
586 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
587 &weight_op[1], &weight_avg[1],
588 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
589 }else if(IS_8X16(mb_type)){
590 mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
591 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
592 &weight_op[2], &weight_avg[2],
593 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
594 mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
595 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
596 &weight_op[2], &weight_avg[2],
597 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
598 }else{
599 int i;
600
601 assert(IS_8X8(mb_type));
602
603 for(i=0; i<4; i++){
604 const int sub_mb_type= h->sub_mb_type[i];
605 const int n= 4*i;
606 int x_offset= (i&1)<<2;
607 int y_offset= (i&2)<<1;
608
609 if(IS_SUB_8X8(sub_mb_type)){
610 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
611 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
612 &weight_op[3], &weight_avg[3],
613 IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
614 }else if(IS_SUB_8X4(sub_mb_type)){
615 mc_part(h, n , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
616 qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
617 &weight_op[4], &weight_avg[4],
618 IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
619 mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
620 qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
621 &weight_op[4], &weight_avg[4],
622 IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
623 }else if(IS_SUB_4X8(sub_mb_type)){
624 mc_part(h, n , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
625 qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
626 &weight_op[5], &weight_avg[5],
627 IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
628 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
629 qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
630 &weight_op[5], &weight_avg[5],
631 IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
632 }else{
633 int j;
634 assert(IS_SUB_4X4(sub_mb_type));
635 for(j=0; j<4; j++){
636 int sub_x_offset= x_offset + 2*(j&1);
637 int sub_y_offset= y_offset + (j&2);
638 mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
639 qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
640 &weight_op[6], &weight_avg[6],
641 IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
642 }
643 }
644 }
645 }
646
647 prefetch_motion(h, 1);
648 }
649
650
651 static void free_tables(H264Context *h){
652 int i;
653 H264Context *hx;
654 av_freep(&h->intra4x4_pred_mode);
655 av_freep(&h->chroma_pred_mode_table);
656 av_freep(&h->cbp_table);
657 av_freep(&h->mvd_table[0]);
658 av_freep(&h->mvd_table[1]);
659 av_freep(&h->direct_table);
660 av_freep(&h->non_zero_count);
661 av_freep(&h->slice_table_base);
662 h->slice_table= NULL;
663 av_freep(&h->list_counts);
664
665 av_freep(&h->mb2b_xy);
666 av_freep(&h->mb2b8_xy);
667
668 for(i = 0; i < MAX_THREADS; i++) {
669 hx = h->thread_context[i];
670 if(!hx) continue;
671 av_freep(&hx->top_borders[1]);
672 av_freep(&hx->top_borders[0]);
673 av_freep(&hx->s.obmc_scratchpad);
674 av_freep(&hx->rbsp_buffer[1]);
675 av_freep(&hx->rbsp_buffer[0]);
676 hx->rbsp_buffer_size[0] = 0;
677 hx->rbsp_buffer_size[1] = 0;
678 if (i) av_freep(&h->thread_context[i]);
679 }
680 }
681
682 static void init_dequant8_coeff_table(H264Context *h){
683 int i,q,x;
684 const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
685 h->dequant8_coeff[0] = h->dequant8_buffer[0];
686 h->dequant8_coeff[1] = h->dequant8_buffer[1];
687
688 for(i=0; i<2; i++ ){
689 if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
690 h->dequant8_coeff[1] = h->dequant8_buffer[0];
691 break;
692 }
693
694 for(q=0; q<52; q++){
695 int shift = div6[q];
696 int idx = rem6[q];
697 for(x=0; x<64; x++)
698 h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
699 ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
700 h->pps.scaling_matrix8[i][x]) << shift;
701 }
702 }
703 }
704
705 static void init_dequant4_coeff_table(H264Context *h){
706 int i,j,q,x;
707 const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
708 for(i=0; i<6; i++ ){
709 h->dequant4_coeff[i] = h->dequant4_buffer[i];
710 for(j=0; j<i; j++){
711 if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
712 h->dequant4_coeff[i] = h->dequant4_buffer[j];
713 break;
714 }
715 }
716 if(j<i)
717 continue;
718
719 for(q=0; q<52; q++){
720 int shift = div6[q] + 2;
721 int idx = rem6[q];
722 for(x=0; x<16; x++)
723 h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
724 ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
725 h->pps.scaling_matrix4[i][x]) << shift;
726 }
727 }
728 }
729
730 static void init_dequant_tables(H264Context *h){
731 int i,x;
732 init_dequant4_coeff_table(h);
733 if(h->pps.transform_8x8_mode)
734 init_dequant8_coeff_table(h);
735 if(h->sps.transform_bypass){
736 for(i=0; i<6; i++)
737 for(x=0; x<16; x++)
738 h->dequant4_coeff[i][0][x] = 1<<6;
739 if(h->pps.transform_8x8_mode)
740 for(i=0; i<2; i++)
741 for(x=0; x<64; x++)
742 h->dequant8_coeff[i][0][x] = 1<<6;
743 }
744 }
745
746
747 int ff_h264_alloc_tables(H264Context *h){
748 MpegEncContext * const s = &h->s;
749 const int big_mb_num= s->mb_stride * (s->mb_height+1);
750 int x,y;
751
752 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, big_mb_num * 8 * sizeof(uint8_t), fail)
753
754 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count , big_mb_num * 32 * sizeof(uint8_t), fail)
755 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
756 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
757
758 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
759 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t), fail);
760 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t), fail);
761 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 32*big_mb_num * sizeof(uint8_t) , fail);
762 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
763
764 memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base));
765 h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
766
767 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy , big_mb_num * sizeof(uint32_t), fail);
768 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b8_xy , big_mb_num * sizeof(uint32_t), fail);
769 for(y=0; y<s->mb_height; y++){
770 for(x=0; x<s->mb_width; x++){
771 const int mb_xy= x + y*s->mb_stride;
772 const int b_xy = 4*x + 4*y*h->b_stride;
773 const int b8_xy= 2*x + 2*y*h->b8_stride;
774
775 h->mb2b_xy [mb_xy]= b_xy;
776 h->mb2b8_xy[mb_xy]= b8_xy;
777 }
778 }
779
780 s->obmc_scratchpad = NULL;
781
782 if(!h->dequant4_coeff[0])
783 init_dequant_tables(h);
784
785 return 0;
786 fail:
787 free_tables(h);
788 return -1;
789 }
790
791 /**
792 * Mimic alloc_tables(), but for every context thread.
793 */
794 static void clone_tables(H264Context *dst, H264Context *src){
795 dst->intra4x4_pred_mode = src->intra4x4_pred_mode;
796 dst->non_zero_count = src->non_zero_count;
797 dst->slice_table = src->slice_table;
798 dst->cbp_table = src->cbp_table;
799 dst->mb2b_xy = src->mb2b_xy;
800 dst->mb2b8_xy = src->mb2b8_xy;
801 dst->chroma_pred_mode_table = src->chroma_pred_mode_table;
802 dst->mvd_table[0] = src->mvd_table[0];
803 dst->mvd_table[1] = src->mvd_table[1];
804 dst->direct_table = src->direct_table;
805 dst->list_counts = src->list_counts;
806
807 dst->s.obmc_scratchpad = NULL;
808 ff_h264_pred_init(&dst->hpc, src->s.codec_id);
809 }
810
811 /**
812 * Init context
813 * Allocate buffers which are not shared amongst multiple threads.
814 */
815 static int context_init(H264Context *h){
816 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
817 FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
818
819 return 0;
820 fail:
821 return -1; // free_tables will clean up for us
822 }
823
824 static av_cold void common_init(H264Context *h){
825 MpegEncContext * const s = &h->s;
826
827 s->width = s->avctx->width;
828 s->height = s->avctx->height;
829 s->codec_id= s->avctx->codec->id;
830
831 ff_h264_pred_init(&h->hpc, s->codec_id);
832
833 h->dequant_coeff_pps= -1;
834 s->unrestricted_mv=1;
835 s->decode=1; //FIXME
836
837 dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
838
839 memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
840 memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
841 }
842
843 av_cold int ff_h264_decode_init(AVCodecContext *avctx){
844 H264Context *h= avctx->priv_data;
845 MpegEncContext * const s = &h->s;
846
847 MPV_decode_defaults(s);
848
849 s->avctx = avctx;
850 common_init(h);
851
852 s->out_format = FMT_H264;
853 s->workaround_bugs= avctx->workaround_bugs;
854
855 // set defaults
856 // s->decode_mb= ff_h263_decode_mb;
857 s->quarter_sample = 1;
858 if(!avctx->has_b_frames)
859 s->low_delay= 1;
860
861 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
862
863 ff_h264_decode_init_vlc();
864
865 if(avctx->extradata_size > 0 && avctx->extradata &&
866 *(char *)avctx->extradata == 1){
867 h->is_avc = 1;
868 h->got_avcC = 0;
869 } else {
870 h->is_avc = 0;
871 }
872
873 h->thread_context[0] = h;
874 h->outputed_poc = INT_MIN;
875 h->prev_poc_msb= 1<<16;
876 h->x264_build = -1;
877 ff_h264_reset_sei(h);
878 if(avctx->codec_id == CODEC_ID_H264){
879 if(avctx->ticks_per_frame == 1){
880 s->avctx->time_base.den *=2;
881 }
882 avctx->ticks_per_frame = 2;
883 }
884 return 0;
885 }
886
887 int ff_h264_frame_start(H264Context *h){
888 MpegEncContext * const s = &h->s;
889 int i;
890
891 if(MPV_frame_start(s, s->avctx) < 0)
892 return -1;
893 ff_er_frame_start(s);
894 /*
895 * MPV_frame_start uses pict_type to derive key_frame.
896 * This is incorrect for H.264; IDR markings must be used.
897 * Zero here; IDR markings per slice in frame or fields are ORed in later.
898 * See decode_nal_units().
899 */
900 s->current_picture_ptr->key_frame= 0;
901 s->current_picture_ptr->mmco_reset= 0;
902
903 assert(s->linesize && s->uvlinesize);
904
905 for(i=0; i<16; i++){
906 h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
907 h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
908 }
909 for(i=0; i<4; i++){
910 h->block_offset[16+i]=
911 h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
912 h->block_offset[24+16+i]=
913 h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
914 }
915
916 /* can't be in alloc_tables because linesize isn't known there.
917 * FIXME: redo bipred weight to not require extra buffer? */
918 for(i = 0; i < s->avctx->thread_count; i++)
919 if(!h->thread_context[i]->s.obmc_scratchpad)
920 h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
921
922 /* some macroblocks will be accessed before they're available */
923 if(FRAME_MBAFF || s->avctx->thread_count > 1)
924 memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
925
926 // s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
927
928 // We mark the current picture as non-reference after allocating it, so
929 // that if we break out due to an error it can be released automatically
930 // in the next MPV_frame_start().
931 // SVQ3 as well as most other codecs have only last/next/current and thus
932 // get released even with set reference, besides SVQ3 and others do not
933 // mark frames as reference later "naturally".
934 if(s->codec_id != CODEC_ID_SVQ3)
935 s->current_picture_ptr->reference= 0;
936
937 s->current_picture_ptr->field_poc[0]=
938 s->current_picture_ptr->field_poc[1]= INT_MAX;
939 assert(s->current_picture_ptr->long_ref==0);
940
941 return 0;
942 }
943
944 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){
945 MpegEncContext * const s = &h->s;
946 uint8_t *top_border;
947 int top_idx = 1;
948
949 src_y -= linesize;
950 src_cb -= uvlinesize;
951 src_cr -= uvlinesize;
952
953 if(!simple && FRAME_MBAFF){
954 if(s->mb_y&1){
955 if(!MB_MBAFF){
956 top_border = h->top_borders[0][s->mb_x];
957 AV_COPY128(top_border, src_y + 15*linesize);
958 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
959 AV_COPY64(top_border+16, src_cb+7*uvlinesize);
960 AV_COPY64(top_border+24, src_cr+7*uvlinesize);
961 }
962 }
963 }else if(MB_MBAFF){
964 top_idx = 0;
965 }else
966 return;
967 }
968
969 top_border = h->top_borders[top_idx][s->mb_x];
970 // There are two lines saved, the line above the the top macroblock of a pair,
971 // and the line above the bottom macroblock
972 AV_COPY128(top_border, src_y + 16*linesize);
973
974 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
975 AV_COPY64(top_border+16, src_cb+8*uvlinesize);
976 AV_COPY64(top_border+24, src_cr+8*uvlinesize);
977 }
978 }
979
980 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){
981 MpegEncContext * const s = &h->s;
982 int deblock_left;
983 int deblock_top;
984 int mb_xy;
985 int top_idx = 1;
986 uint8_t *top_border_m1;
987 uint8_t *top_border;
988
989 if(!simple && FRAME_MBAFF){
990 if(s->mb_y&1){
991 if(!MB_MBAFF)
992 return;
993 }else{
994 top_idx = MB_MBAFF ? 0 : 1;
995 }
996 }
997
998 if(h->deblocking_filter == 2) {
999 mb_xy = h->mb_xy;
1000 deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
1001 deblock_top = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
1002 } else {
1003 deblock_left = (s->mb_x > 0);
1004 deblock_top = (s->mb_y > !!MB_FIELD);
1005 }
1006
1007 src_y -= linesize + 1;
1008 src_cb -= uvlinesize + 1;
1009 src_cr -= uvlinesize + 1;
1010
1011 top_border_m1 = h->top_borders[top_idx][s->mb_x-1];
1012 top_border = h->top_borders[top_idx][s->mb_x];
1013
1014 #define XCHG(a,b,xchg)\
1015 if (xchg) AV_SWAP64(b,a);\
1016 else AV_COPY64(b,a);
1017
1018 if(deblock_top){
1019 if(deblock_left){
1020 XCHG(top_border_m1+8, src_y -7, 1);
1021 }
1022 XCHG(top_border+0, src_y +1, xchg);
1023 XCHG(top_border+8, src_y +9, 1);
1024 if(s->mb_x+1 < s->mb_width){
1025 XCHG(h->top_borders[top_idx][s->mb_x+1], src_y +17, 1);
1026 }
1027 }
1028
1029 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1030 if(deblock_top){
1031 if(deblock_left){
1032 XCHG(top_border_m1+16, src_cb -7, 1);
1033 XCHG(top_border_m1+24, src_cr -7, 1);
1034 }
1035 XCHG(top_border+16, src_cb+1, 1);
1036 XCHG(top_border+24, src_cr+1, 1);
1037 }
1038 }
1039 }
1040
1041 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
1042 MpegEncContext * const s = &h->s;
1043 const int mb_x= s->mb_x;
1044 const int mb_y= s->mb_y;
1045 const int mb_xy= h->mb_xy;
1046 const int mb_type= s->current_picture.mb_type[mb_xy];
1047 uint8_t *dest_y, *dest_cb, *dest_cr;
1048 int linesize, uvlinesize /*dct_offset*/;
1049 int i;
1050 int *block_offset = &h->block_offset[0];
1051 const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
1052 /* is_h264 should always be true if SVQ3 is disabled. */
1053 const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
1054 void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
1055 void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
1056
1057 dest_y = s->current_picture.data[0] + (mb_x + mb_y * s->linesize ) * 16;
1058 dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
1059 dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
1060
1061 s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
1062 s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
1063
1064 h->list_counts[mb_xy]= h->list_count;
1065
1066 if (!simple && MB_FIELD) {
1067 linesize = h->mb_linesize = s->linesize * 2;
1068 uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
1069 block_offset = &h->block_offset[24];
1070 if(mb_y&1){ //FIXME move out of this function?
1071 dest_y -= s->linesize*15;
1072 dest_cb-= s->uvlinesize*7;
1073 dest_cr-= s->uvlinesize*7;
1074 }
1075 if(FRAME_MBAFF) {
1076 int list;
1077 for(list=0; list<h->list_count; list++){
1078 if(!USES_LIST(mb_type, list))
1079 continue;
1080 if(IS_16X16(mb_type)){
1081 int8_t *ref = &h->ref_cache[list][scan8[0]];
1082 fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
1083 }else{
1084 for(i=0; i<16; i+=4){
1085 int ref = h->ref_cache[list][scan8[i]];
1086 if(ref >= 0)
1087 fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
1088 }
1089 }
1090 }
1091 }
1092 } else {
1093 linesize = h->mb_linesize = s->linesize;
1094 uvlinesize = h->mb_uvlinesize = s->uvlinesize;
1095 // dct_offset = s->linesize * 16;
1096 }
1097
1098 if (!simple && IS_INTRA_PCM(mb_type)) {
1099 for (i=0; i<16; i++) {
1100 memcpy(dest_y + i* linesize, h->mb + i*8, 16);
1101 }
1102 for (i=0; i<8; i++) {
1103 memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4, 8);
1104 memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4, 8);
1105 }
1106 } else {
1107 if(IS_INTRA(mb_type)){
1108 if(h->deblocking_filter)
1109 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
1110
1111 if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
1112 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
1113 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
1114 }
1115
1116 if(IS_INTRA4x4(mb_type)){
1117 if(simple || !s->encoding){
1118 if(IS_8x8DCT(mb_type)){
1119 if(transform_bypass){
1120 idct_dc_add =
1121 idct_add = s->dsp.add_pixels8;
1122 }else{
1123 idct_dc_add = s->dsp.h264_idct8_dc_add;
1124 idct_add = s->dsp.h264_idct8_add;
1125 }
1126 for(i=0; i<16; i+=4){
1127 uint8_t * const ptr= dest_y + block_offset[i];
1128 const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1129 if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1130 h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
1131 }else{
1132 const int nnz = h->non_zero_count_cache[ scan8[i] ];
1133 h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
1134 (h->topright_samples_available<<i)&0x4000, linesize);
1135 if(nnz){
1136 if(nnz == 1 && h->mb[i*16])
1137 idct_dc_add(ptr, h->mb + i*16, linesize);
1138 else
1139 idct_add (ptr, h->mb + i*16, linesize);
1140 }
1141 }
1142 }
1143 }else{
1144 if(transform_bypass){
1145 idct_dc_add =
1146 idct_add = s->dsp.add_pixels4;
1147 }else{
1148 idct_dc_add = s->dsp.h264_idct_dc_add;
1149 idct_add = s->dsp.h264_idct_add;
1150 }
1151 for(i=0; i<16; i++){
1152 uint8_t * const ptr= dest_y + block_offset[i];
1153 const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
1154
1155 if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
1156 h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
1157 }else{
1158 uint8_t *topright;
1159 int nnz, tr;
1160 if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
1161 const int topright_avail= (h->topright_samples_available<<i)&0x8000;
1162 assert(mb_y || linesize <= block_offset[i]);
1163 if(!topright_avail){
1164 tr= ptr[3 - linesize]*0x01010101;
1165 topright= (uint8_t*) &tr;
1166 }else
1167 topright= ptr + 4 - linesize;
1168 }else
1169 topright= NULL;
1170
1171 h->hpc.pred4x4[ dir ](ptr, topright, linesize);
1172 nnz = h->non_zero_count_cache[ scan8[i] ];
1173 if(nnz){
1174 if(is_h264){
1175 if(nnz == 1 && h->mb[i*16])
1176 idct_dc_add(ptr, h->mb + i*16, linesize);
1177 else
1178 idct_add (ptr, h->mb + i*16, linesize);
1179 }else
1180 ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
1181 }
1182 }
1183 }
1184 }
1185 }
1186 }else{
1187 h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
1188 if(is_h264){
1189 if(!transform_bypass)
1190 h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
1191 }else
1192 ff_svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
1193 }
1194 if(h->deblocking_filter)
1195 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
1196 }else if(is_h264){
1197 hl_motion(h, dest_y, dest_cb, dest_cr,
1198 s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
1199 s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
1200 s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
1201 }
1202
1203
1204 if(!IS_INTRA4x4(mb_type)){
1205 if(is_h264){
1206 if(IS_INTRA16x16(mb_type)){
1207 if(transform_bypass){
1208 if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
1209 h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
1210 }else{
1211 for(i=0; i<16; i++){
1212 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1213 s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
1214 }
1215 }
1216 }else{
1217 s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1218 }
1219 }else if(h->cbp&15){
1220 if(transform_bypass){
1221 const int di = IS_8x8DCT(mb_type) ? 4 : 1;
1222 idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
1223 for(i=0; i<16; i+=di){
1224 if(h->non_zero_count_cache[ scan8[i] ]){
1225 idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
1226 }
1227 }
1228 }else{
1229 if(IS_8x8DCT(mb_type)){
1230 s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1231 }else{
1232 s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
1233 }
1234 }
1235 }
1236 }else{
1237 for(i=0; i<16; i++){
1238 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
1239 uint8_t * const ptr= dest_y + block_offset[i];
1240 ff_svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
1241 }
1242 }
1243 }
1244 }
1245
1246 if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
1247 uint8_t *dest[2] = {dest_cb, dest_cr};
1248 if(transform_bypass){
1249 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
1250 h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
1251 h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
1252 }else{
1253 idct_add = s->dsp.add_pixels4;
1254 for(i=16; i<16+8; i++){
1255 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
1256 idct_add (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1257 }
1258 }
1259 }else{
1260 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]);
1261 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]);
1262 if(is_h264){
1263 idct_add = s->dsp.h264_idct_add;
1264 idct_dc_add = s->dsp.h264_idct_dc_add;
1265 for(i=16; i<16+8; i++){
1266 if(h->non_zero_count_cache[ scan8[i] ])
1267 idct_add (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1268 else if(h->mb[i*16])
1269 idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
1270 }
1271 }else{
1272 for(i=16; i<16+8; i++){
1273 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
1274 uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
1275 ff_svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, ff_h264_chroma_qp[s->qscale + 12] - 12, 2);
1276 }
1277 }
1278 }
1279 }
1280 }
1281 }
1282 if(h->cbp || IS_INTRA(mb_type))
1283 s->dsp.clear_blocks(h->mb);
1284 }
1285
1286 /**
1287 * Process a macroblock; this case avoids checks for expensive uncommon cases.
1288 */
1289 static void hl_decode_mb_simple(H264Context *h){
1290 hl_decode_mb_internal(h, 1);
1291 }
1292
1293 /**
1294 * Process a macroblock; this handles edge cases, such as interlacing.
1295 */
1296 static void av_noinline hl_decode_mb_complex(H264Context *h){
1297 hl_decode_mb_internal(h, 0);
1298 }
1299
1300 void ff_h264_hl_decode_mb(H264Context *h){
1301 MpegEncContext * const s = &h->s;
1302 const int mb_xy= h->mb_xy;
1303 const int mb_type= s->current_picture.mb_type[mb_xy];
1304 int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
1305
1306 if (is_complex)
1307 hl_decode_mb_complex(h);
1308 else hl_decode_mb_simple(h);
1309 }
1310
1311 static int pred_weight_table(H264Context *h){
1312 MpegEncContext * const s = &h->s;
1313 int list, i;
1314 int luma_def, chroma_def;
1315
1316 h->use_weight= 0;
1317 h->use_weight_chroma= 0;
1318 h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
1319 h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
1320 luma_def = 1<<h->luma_log2_weight_denom;
1321 chroma_def = 1<<h->chroma_log2_weight_denom;
1322
1323 for(list=0; list<2; list++){
1324 h->luma_weight_flag[list] = 0;
1325 h->chroma_weight_flag[list] = 0;
1326 for(i=0; i<h->ref_count[list]; i++){
1327 int luma_weight_flag, chroma_weight_flag;
1328
1329 luma_weight_flag= get_bits1(&s->gb);
1330 if(luma_weight_flag){
1331 h->luma_weight[list][i]= get_se_golomb(&s->gb);
1332 h->luma_offset[list][i]= get_se_golomb(&s->gb);
1333 if( h->luma_weight[list][i] != luma_def
1334 || h->luma_offset[list][i] != 0) {
1335 h->use_weight= 1;
1336 h->luma_weight_flag[list]= 1;
1337 }
1338 }else{
1339 h->luma_weight[list][i]= luma_def;
1340 h->luma_offset[list][i]= 0;
1341 }
1342
1343 if(CHROMA){
1344 chroma_weight_flag= get_bits1(&s->gb);
1345 if(chroma_weight_flag){
1346 int j;
1347 for(j=0; j<2; j++){
1348 h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
1349 h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
1350 if( h->chroma_weight[list][i][j] != chroma_def
1351 || h->chroma_offset[list][i][j] != 0) {
1352 h->use_weight_chroma= 1;
1353 h->chroma_weight_flag[list]= 1;
1354 }
1355 }
1356 }else{
1357 int j;
1358 for(j=0; j<2; j++){
1359 h->chroma_weight[list][i][j]= chroma_def;
1360 h->chroma_offset[list][i][j]= 0;
1361 }
1362 }
1363 }
1364 }
1365 if(h->slice_type_nos != FF_B_TYPE) break;
1366 }
1367 h->use_weight= h->use_weight || h->use_weight_chroma;
1368 return 0;
1369 }
1370
1371 static void implicit_weight_table(H264Context *h){
1372 MpegEncContext * const s = &h->s;
1373 int ref0, ref1, i;
1374 int cur_poc = s->current_picture_ptr->poc;
1375
1376 for (i = 0; i < 2; i++) {
1377 h->luma_weight_flag[i] = 0;
1378 h->chroma_weight_flag[i] = 0;
1379 }
1380
1381 if( h->ref_count[0] == 1 && h->ref_count[1] == 1
1382 && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
1383 h->use_weight= 0;
1384 h->use_weight_chroma= 0;
1385 return;
1386 }
1387
1388 h->use_weight= 2;
1389 h->use_weight_chroma= 2;
1390 h->luma_log2_weight_denom= 5;
1391 h->chroma_log2_weight_denom= 5;
1392
1393 for(ref0=0; ref0 < h->ref_count[0]; ref0++){
1394 int poc0 = h->ref_list[0][ref0].poc;
1395 for(ref1=0; ref1 < h->ref_count[1]; ref1++){
1396 int poc1 = h->ref_list[1][ref1].poc;
1397 int td = av_clip(poc1 - poc0, -128, 127);
1398 if(td){
1399 int tb = av_clip(cur_poc - poc0, -128, 127);
1400 int tx = (16384 + (FFABS(td) >> 1)) / td;
1401 int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
1402 if(dist_scale_factor < -64 || dist_scale_factor > 128)
1403 h->implicit_weight[ref0][ref1] = 32;
1404 else
1405 h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
1406 }else
1407 h->implicit_weight[ref0][ref1] = 32;
1408 }
1409 }
1410 }
1411
1412 /**
1413 * instantaneous decoder refresh.
1414 */
1415 static void idr(H264Context *h){
1416 ff_h264_remove_all_refs(h);
1417 h->prev_frame_num= 0;
1418 h->prev_frame_num_offset= 0;
1419 h->prev_poc_msb=
1420 h->prev_poc_lsb= 0;
1421 }
1422
1423 /* forget old pics after a seek */
1424 static void flush_dpb(AVCodecContext *avctx){
1425 H264Context *h= avctx->priv_data;
1426 int i;
1427 for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
1428 if(h->delayed_pic[i])
1429 h->delayed_pic[i]->reference= 0;
1430 h->delayed_pic[i]= NULL;
1431 }
1432 h->outputed_poc= INT_MIN;
1433 h->prev_interlaced_frame = 1;
1434 idr(h);
1435 if(h->s.current_picture_ptr)
1436 h->s.current_picture_ptr->reference= 0;
1437 h->s.first_field= 0;
1438 ff_h264_reset_sei(h);
1439 ff_mpeg_flush(avctx);
1440 }
1441
1442 static int init_poc(H264Context *h){
1443 MpegEncContext * const s = &h->s;
1444 const int max_frame_num= 1<<h->sps.log2_max_frame_num;
1445 int field_poc[2];
1446 Picture *cur = s->current_picture_ptr;
1447
1448 h->frame_num_offset= h->prev_frame_num_offset;
1449 if(h->frame_num < h->prev_frame_num)
1450 h->frame_num_offset += max_frame_num;
1451
1452 if(h->sps.poc_type==0){
1453 const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
1454
1455 if (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
1456 h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1457 else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
1458 h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1459 else
1460 h->poc_msb = h->prev_poc_msb;
1461 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
1462 field_poc[0] =
1463 field_poc[1] = h->poc_msb + h->poc_lsb;
1464 if(s->picture_structure == PICT_FRAME)
1465 field_poc[1] += h->delta_poc_bottom;
1466 }else if(h->sps.poc_type==1){
1467 int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1468 int i;
1469
1470 if(h->sps.poc_cycle_length != 0)
1471 abs_frame_num = h->frame_num_offset + h->frame_num;
1472 else
1473 abs_frame_num = 0;
1474
1475 if(h->nal_ref_idc==0 && abs_frame_num > 0)
1476 abs_frame_num--;
1477
1478 expected_delta_per_poc_cycle = 0;
1479 for(i=0; i < h->sps.poc_cycle_length; i++)
1480 expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
1481
1482 if(abs_frame_num > 0){
1483 int poc_cycle_cnt = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1484 int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1485
1486 expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1487 for(i = 0; i <= frame_num_in_poc_cycle; i++)
1488 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
1489 } else
1490 expectedpoc = 0;
1491
1492 if(h->nal_ref_idc == 0)
1493 expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1494
1495 field_poc[0] = expectedpoc + h->delta_poc[0];
1496 field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1497
1498 if(s->picture_structure == PICT_FRAME)
1499 field_poc[1] += h->delta_poc[1];
1500 }else{
1501 int poc= 2*(h->frame_num_offset + h->frame_num);
1502
1503 if(!h->nal_ref_idc)
1504 poc--;
1505
1506 field_poc[0]= poc;
1507 field_poc[1]= poc;
1508 }
1509
1510 if(s->picture_structure != PICT_BOTTOM_FIELD)
1511 s->current_picture_ptr->field_poc[0]= field_poc[0];
1512 if(s->picture_structure != PICT_TOP_FIELD)
1513 s->current_picture_ptr->field_poc[1]= field_poc[1];
1514 cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
1515
1516 return 0;
1517 }
1518
1519
1520 /**
1521 * initialize scan tables
1522 */
1523 static void init_scan_tables(H264Context *h){
1524 MpegEncContext * const s = &h->s;
1525 int i;
1526 if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
1527 memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
1528 memcpy(h-> field_scan, field_scan, 16*sizeof(uint8_t));
1529 }else{
1530 for(i=0; i<16; i++){
1531 #define T(x) (x>>2) | ((x<<2) & 0xF)
1532 h->zigzag_scan[i] = T(zigzag_scan[i]);
1533 h-> field_scan[i] = T( field_scan[i]);
1534 #undef T
1535 }
1536 }
1537 if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
1538 memcpy(h->zigzag_scan8x8, ff_zigzag_direct, 64*sizeof(uint8_t));
1539 memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
1540 memcpy(h->field_scan8x8, field_scan8x8, 64*sizeof(uint8_t));
1541 memcpy(h->field_scan8x8_cavlc, field_scan8x8_cavlc, 64*sizeof(uint8_t));
1542 }else{
1543 for(i=0; i<64; i++){
1544 #define T(x) (x>>3) | ((x&7)<<3)
1545 h->zigzag_scan8x8[i] = T(ff_zigzag_direct[i]);
1546 h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
1547 h->field_scan8x8[i] = T(field_scan8x8[i]);
1548 h->field_scan8x8_cavlc[i] = T(field_scan8x8_cavlc[i]);
1549 #undef T
1550 }
1551 }
1552 if(h->sps.transform_bypass){ //FIXME same ugly
1553 h->zigzag_scan_q0 = zigzag_scan;
1554 h->zigzag_scan8x8_q0 = ff_zigzag_direct;
1555 h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
1556 h->field_scan_q0 = field_scan;
1557 h->field_scan8x8_q0 = field_scan8x8;
1558 h->field_scan8x8_cavlc_q0 = field_scan8x8_cavlc;
1559 }else{
1560 h->zigzag_scan_q0 = h->zigzag_scan;
1561 h->zigzag_scan8x8_q0 = h->zigzag_scan8x8;
1562 h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
1563 h->field_scan_q0 = h->field_scan;
1564 h->field_scan8x8_q0 = h->field_scan8x8;
1565 h->field_scan8x8_cavlc_q0 = h->field_scan8x8_cavlc;
1566 }
1567 }
1568
1569 static void field_end(H264Context *h){
1570 MpegEncContext * const s = &h->s;
1571 AVCodecContext * const avctx= s->avctx;
1572 s->mb_y= 0;
1573
1574 s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
1575 s->current_picture_ptr->pict_type= s->pict_type;
1576
1577 if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1578 ff_vdpau_h264_set_reference_frames(s);
1579
1580 if(!s->dropable) {
1581 ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
1582 h->prev_poc_msb= h->poc_msb;
1583 h->prev_poc_lsb= h->poc_lsb;
1584 }
1585 h->prev_frame_num_offset= h->frame_num_offset;
1586 h->prev_frame_num= h->frame_num;
1587
1588 if (avctx->hwaccel) {
1589 if (avctx->hwaccel->end_frame(avctx) < 0)
1590 av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
1591 }
1592
1593 if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
1594 ff_vdpau_h264_picture_complete(s);
1595
1596 /*
1597 * FIXME: Error handling code does not seem to support interlaced
1598 * when slices span multiple rows
1599 * The ff_er_add_slice calls don't work right for bottom
1600 * fields; they cause massive erroneous error concealing
1601 * Error marking covers both fields (top and bottom).
1602 * This causes a mismatched s->error_count
1603 * and a bad error table. Further, the error count goes to
1604 * INT_MAX when called for bottom field, because mb_y is
1605 * past end by one (callers fault) and resync_mb_y != 0
1606 * causes problems for the first MB line, too.
1607 */
1608 if (!FIELD_PICTURE)
1609 ff_er_frame_end(s);
1610
1611 MPV_frame_end(s);
1612
1613 h->current_slice=0;
1614 }
1615
1616 /**
1617 * Replicates H264 "master" context to thread contexts.
1618 */
1619 static void clone_slice(H264Context *dst, H264Context *src)
1620 {
1621 memcpy(dst->block_offset, src->block_offset, sizeof(dst->block_offset));
1622 dst->s.current_picture_ptr = src->s.current_picture_ptr;
1623 dst->s.current_picture = src->s.current_picture;
1624 dst->s.linesize = src->s.linesize;
1625 dst->s.uvlinesize = src->s.uvlinesize;
1626 dst->s.first_field = src->s.first_field;
1627
1628 dst->prev_poc_msb = src->prev_poc_msb;
1629 dst->prev_poc_lsb = src->prev_poc_lsb;
1630 dst->prev_frame_num_offset = src->prev_frame_num_offset;
1631 dst->prev_frame_num = src->prev_frame_num;
1632 dst->short_ref_count = src->short_ref_count;
1633
1634 memcpy(dst->short_ref, src->short_ref, sizeof(dst->short_ref));
1635 memcpy(dst->long_ref, src->long_ref, sizeof(dst->long_ref));
1636 memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
1637 memcpy(dst->ref_list, src->ref_list, sizeof(dst->ref_list));
1638
1639 memcpy(dst->dequant4_coeff, src->dequant4_coeff, sizeof(src->dequant4_coeff));
1640 memcpy(dst->dequant8_coeff, src->dequant8_coeff, sizeof(src->dequant8_coeff));
1641 }
1642
1643 /**
1644 * decodes a slice header.
1645 * This will also call MPV_common_init() and frame_start() as needed.
1646 *
1647 * @param h h264context
1648 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
1649 *
1650 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
1651 */
1652 static int decode_slice_header(H264Context *h, H264Context *h0){
1653 MpegEncContext * const s = &h->s;
1654 MpegEncContext * const s0 = &h0->s;
1655 unsigned int first_mb_in_slice;
1656 unsigned int pps_id;
1657 int num_ref_idx_active_override_flag;
1658 unsigned int slice_type, tmp, i, j;
1659 int default_ref_list_done = 0;
1660 int last_pic_structure;
1661
1662 s->dropable= h->nal_ref_idc == 0;
1663
1664 if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
1665 s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
1666 s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
1667 }else{
1668 s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
1669 s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
1670 }
1671
1672 first_mb_in_slice= get_ue_golomb(&s->gb);
1673
1674 if(first_mb_in_slice == 0){ //FIXME better field boundary detection
1675 if(h0->current_slice && FIELD_PICTURE){
1676 field_end(h);
1677 }
1678
1679 h0->current_slice = 0;
1680 if (!s0->first_field)
1681 s->current_picture_ptr= NULL;
1682 }
1683
1684 slice_type= get_ue_golomb_31(&s->gb);
1685 if(slice_type > 9){
1686 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);
1687 return -1;
1688 }
1689 if(slice_type > 4){
1690 slice_type -= 5;
1691 h->slice_type_fixed=1;
1692 }else
1693 h->slice_type_fixed=0;
1694
1695 slice_type= golomb_to_pict_type[ slice_type ];
1696 if (slice_type == FF_I_TYPE
1697 || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
1698 default_ref_list_done = 1;
1699 }
1700 h->slice_type= slice_type;
1701 h->slice_type_nos= slice_type & 3;
1702
1703 s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
1704
1705 pps_id= get_ue_golomb(&s->gb);
1706 if(pps_id>=MAX_PPS_COUNT){
1707 av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
1708 return -1;
1709 }
1710 if(!h0->pps_buffers[pps_id]) {
1711 av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
1712 return -1;
1713 }
1714 h->pps= *h0->pps_buffers[pps_id];
1715
1716 if(!h0->sps_buffers[h->pps.sps_id]) {
1717 av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
1718 return -1;
1719 }
1720 h->sps = *h0->sps_buffers[h->pps.sps_id];
1721
1722 if(h == h0 && h->dequant_coeff_pps != pps_id){
1723 h->dequant_coeff_pps = pps_id;
1724 init_dequant_tables(h);
1725 }
1726
1727 s->mb_width= h->sps.mb_width;
1728 s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
1729
1730 h->b_stride= s->mb_width*4;
1731 h->b8_stride= s->mb_width*2;
1732
1733 s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
1734 if(h->sps.frame_mbs_only_flag)
1735 s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
1736 else
1737 s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
1738
1739 if (s->context_initialized
1740 && ( s->width != s->avctx->width || s->height != s->avctx->height)) {
1741 if(h != h0)
1742 return -1; // width / height changed during parallelized decoding
1743 free_tables(h);
1744 flush_dpb(s->avctx);
1745 MPV_common_end(s);
1746 }
1747 if (!s->context_initialized) {
1748 if(h != h0)
1749 return -1; // we cant (re-)initialize context during parallel decoding
1750
1751 avcodec_set_dimensions(s->avctx, s->width, s->height);
1752 s->avctx->sample_aspect_ratio= h->sps.sar;
1753 if(!s->avctx->sample_aspect_ratio.den)
1754 s->avctx->sample_aspect_ratio.den = 1;
1755
1756 if(h->sps.video_signal_type_present_flag){
1757 s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
1758 if(h->sps.colour_description_present_flag){
1759 s->avctx->color_primaries = h->sps.color_primaries;
1760 s->avctx->color_trc = h->sps.color_trc;
1761 s->avctx->colorspace = h->sps.colorspace;
1762 }
1763 }
1764
1765 if(h->sps.timing_info_present_flag){
1766 int64_t den= h->sps.time_scale;
1767 if(h->x264_build < 44U)
1768 den *= 2;
1769 av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
1770 h->sps.num_units_in_tick, den, 1<<30);
1771 }
1772 s->avctx->pix_fmt = s->avctx->get_format(s->avctx, s->avctx->codec->pix_fmts);
1773 s->avctx->hwaccel = ff_find_hwaccel(s->avctx->codec->id, s->avctx->pix_fmt);
1774
1775 if (MPV_common_init(s) < 0)
1776 return -1;
1777 s->first_field = 0;
1778 h->prev_interlaced_frame = 1;
1779
1780 init_scan_tables(h);
1781 ff_h264_alloc_tables(h);
1782
1783 for(i = 1; i < s->avctx->thread_count; i++) {
1784 H264Context *c;
1785 c = h->thread_context[i] = av_malloc(sizeof(H264Context));
1786 memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
1787 memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
1788 c->sps = h->sps;
1789 c->pps = h->pps;
1790 init_scan_tables(c);
1791 clone_tables(c, h);
1792 }
1793
1794 for(i = 0; i < s->avctx->thread_count; i++)
1795 if(context_init(h->thread_context[i]) < 0)
1796 return -1;
1797 }
1798
1799 h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
1800
1801 h->mb_mbaff = 0;
1802 h->mb_aff_frame = 0;
1803 last_pic_structure = s0->picture_structure;
1804 if(h->sps.frame_mbs_only_flag){
1805 s->picture_structure= PICT_FRAME;
1806 }else{
1807 if(get_bits1(&s->gb)) { //field_pic_flag
1808 s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
1809 } else {
1810 s->picture_structure= PICT_FRAME;
1811 h->mb_aff_frame = h->sps.mb_aff;
1812 }
1813 }
1814 h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
1815
1816 if(h0->current_slice == 0){
1817 while(h->frame_num != h->prev_frame_num &&
1818 h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
1819 av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
1820 if (ff_h264_frame_start(h) < 0)
1821 return -1;
1822 h->prev_frame_num++;
1823 h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
1824 s->current_picture_ptr->frame_num= h->prev_frame_num;
1825 ff_h264_execute_ref_pic_marking(h, NULL, 0);
1826 }
1827
1828 /* See if we have a decoded first field looking for a pair... */
1829 if (s0->first_field) {
1830 assert(s0->current_picture_ptr);
1831 assert(s0->current_picture_ptr->data[0]);
1832 assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
1833
1834 /* figure out if we have a complementary field pair */
1835 if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
1836 /*
1837 * Previous field is unmatched. Don't display it, but let it
1838 * remain for reference if marked as such.
1839 */
1840 s0->current_picture_ptr = NULL;
1841 s0->first_field = FIELD_PICTURE;
1842
1843 } else {
1844 if (h->nal_ref_idc &&
1845 s0->current_picture_ptr->reference &&
1846 s0->current_picture_ptr->frame_num != h->frame_num) {
1847 /*
1848 * This and previous field were reference, but had
1849 * different frame_nums. Consider this field first in
1850 * pair. Throw away previous field except for reference
1851 * purposes.
1852 */
1853 s0->first_field = 1;
1854 s0->current_picture_ptr = NULL;
1855
1856 } else {
1857 /* Second field in complementary pair */
1858 s0->first_field = 0;
1859 }
1860 }
1861
1862 } else {
1863 /* Frame or first field in a potentially complementary pair */
1864 assert(!s0->current_picture_ptr);
1865 s0->first_field = FIELD_PICTURE;
1866 }
1867
1868 if((!FIELD_PICTURE || s0->first_field) && ff_h264_frame_start(h) < 0) {
1869 s0->first_field = 0;
1870 return -1;
1871 }
1872 }
1873 if(h != h0)
1874 clone_slice(h, h0);
1875
1876 s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
1877
1878 assert(s->mb_num == s->mb_width * s->mb_height);
1879 if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
1880 first_mb_in_slice >= s->mb_num){
1881 av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
1882 return -1;
1883 }
1884 s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
1885 s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
1886 if (s->picture_structure == PICT_BOTTOM_FIELD)
1887 s->resync_mb_y = s->mb_y = s->mb_y + 1;
1888 assert(s->mb_y < s->mb_height);
1889
1890 if(s->picture_structure==PICT_FRAME){
1891 h->curr_pic_num= h->frame_num;
1892 h->max_pic_num= 1<< h->sps.log2_max_frame_num;
1893 }else{
1894 h->curr_pic_num= 2*h->frame_num + 1;
1895 h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
1896 }
1897
1898 if(h->nal_unit_type == NAL_IDR_SLICE){
1899 get_ue_golomb(&s->gb); /* idr_pic_id */
1900 }
1901
1902 if(h->sps.poc_type==0){
1903 h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
1904
1905 if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
1906 h->delta_poc_bottom= get_se_golomb(&s->gb);
1907 }
1908 }
1909
1910 if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
1911 h->delta_poc[0]= get_se_golomb(&s->gb);
1912
1913 if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
1914 h->delta_poc[1]= get_se_golomb(&s->gb);
1915 }
1916
1917 init_poc(h);
1918
1919 if(h->pps.redundant_pic_cnt_present){
1920 h->redundant_pic_count= get_ue_golomb(&s->gb);
1921 }
1922
1923 //set defaults, might be overridden a few lines later
1924 h->ref_count[0]= h->pps.ref_count[0];
1925 h->ref_count[1]= h->pps.ref_count[1];
1926
1927 if(h->slice_type_nos != FF_I_TYPE){
1928 if(h->slice_type_nos == FF_B_TYPE){
1929 h->direct_spatial_mv_pred= get_bits1(&s->gb);
1930 }
1931 num_ref_idx_active_override_flag= get_bits1(&s->gb);
1932
1933 if(num_ref_idx_active_override_flag){
1934 h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
1935 if(h->slice_type_nos==FF_B_TYPE)
1936 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
1937
1938 if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
1939 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
1940 h->ref_count[0]= h->ref_count[1]= 1;
1941 return -1;
1942 }
1943 }
1944 if(h->slice_type_nos == FF_B_TYPE)
1945 h->list_count= 2;
1946 else
1947 h->list_count= 1;
1948 }else
1949 h->list_count= 0;
1950
1951 if(!default_ref_list_done){
1952 ff_h264_fill_default_ref_list(h);
1953 }
1954
1955 if(h->slice_type_nos!=FF_I_TYPE && ff_h264_decode_ref_pic_list_reordering(h) < 0)
1956 return -1;
1957
1958 if(h->slice_type_nos!=FF_I_TYPE){
1959 s->last_picture_ptr= &h->ref_list[0][0];
1960 ff_copy_picture(&s->last_picture, s->last_picture_ptr);
1961 }
1962 if(h->slice_type_nos==FF_B_TYPE){
1963 s->next_picture_ptr= &h->ref_list[1][0];
1964 ff_copy_picture(&s->next_picture, s->next_picture_ptr);
1965 }
1966
1967 if( (h->pps.weighted_pred && h->slice_type_nos == FF_P_TYPE )
1968 || (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
1969 pred_weight_table(h);
1970 else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
1971 implicit_weight_table(h);
1972 else {
1973 h->use_weight = 0;
1974 for (i = 0; i < 2; i++) {
1975 h->luma_weight_flag[i] = 0;
1976 h->chroma_weight_flag[i] = 0;
1977 }
1978 }
1979
1980 if(h->nal_ref_idc)
1981 ff_h264_decode_ref_pic_marking(h0, &s->gb);
1982
1983 if(FRAME_MBAFF)
1984 ff_h264_fill_mbaff_ref_list(h);
1985
1986 if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
1987 ff_h264_direct_dist_scale_factor(h);
1988 ff_h264_direct_ref_list_init(h);
1989
1990 if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
1991 tmp = get_ue_golomb_31(&s->gb);
1992 if(tmp > 2){
1993 av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
1994 return -1;
1995 }
1996 h->cabac_init_idc= tmp;
1997 }
1998
1999 h->last_qscale_diff = 0;
2000 tmp = h->pps.init_qp + get_se_golomb(&s->gb);
2001 if(tmp>51){
2002 av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
2003 return -1;
2004 }
2005 s->qscale= tmp;
2006 h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
2007 h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
2008 //FIXME qscale / qp ... stuff
2009 if(h->slice_type == FF_SP_TYPE){
2010 get_bits1(&s->gb); /* sp_for_switch_flag */
2011 }
2012 if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
2013 get_se_golomb(&s->gb); /* slice_qs_delta */
2014 }
2015
2016 h->deblocking_filter = 1;
2017 h->slice_alpha_c0_offset = 52;
2018 h->slice_beta_offset = 52;
2019 if( h->pps.deblocking_filter_parameters_present ) {
2020 tmp= get_ue_golomb_31(&s->gb);
2021 if(tmp > 2){
2022 av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
2023 return -1;
2024 }
2025 h->deblocking_filter= tmp;
2026 if(h->deblocking_filter < 2)
2027 h->deblocking_filter^= 1; // 1<->0
2028
2029 if( h->deblocking_filter ) {
2030 h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
2031 h->slice_beta_offset += get_se_golomb(&s->gb) << 1;
2032 if( h->slice_alpha_c0_offset > 104U
2033 || h->slice_beta_offset > 104U){
2034 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);
2035 return -1;
2036 }
2037 }
2038 }
2039
2040 if( s->avctx->skip_loop_filter >= AVDISCARD_ALL
2041 ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
2042 ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR && h->slice_type_nos == FF_B_TYPE)
2043 ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2044 h->deblocking_filter= 0;
2045
2046 if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
2047 if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
2048 /* Cheat slightly for speed:
2049 Do not bother to deblock across slices. */
2050 h->deblocking_filter = 2;
2051 } else {
2052 h0->max_contexts = 1;
2053 if(!h0->single_decode_warning) {
2054 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
2055 h0->single_decode_warning = 1;
2056 }
2057 if(h != h0)
2058 return 1; // deblocking switched inside frame
2059 }
2060 }
2061 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]);
2062
2063 #if 0 //FMO
2064 if( h->pps.num_slice_groups > 1 && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
2065 slice_group_change_cycle= get_bits(&s->gb, ?);
2066 #endif
2067
2068 h0->last_slice_type = slice_type;
2069 h->slice_num = ++h0->current_slice;
2070 if(h->slice_num >= MAX_SLICES){
2071 av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
2072 }
2073
2074 for(j=0; j<2; j++){
2075 int id_list[16];
2076 int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
2077 for(i=0; i<16; i++){
2078 id_list[i]= 60;
2079 if(h->ref_list[j][i].data[0]){
2080 int k;
2081 uint8_t *base= h->ref_list[j][i].base[0];
2082 for(k=0; k<h->short_ref_count; k++)
2083 if(h->short_ref[k]->base[0] == base){
2084 id_list[i]= k;
2085 break;
2086 }
2087 for(k=0; k<h->long_ref_count; k++)
2088 if(h->long_ref[k] && h->long_ref[k]->base[0] == base){
2089 id_list[i]= h->short_ref_count + k;
2090 break;
2091 }
2092 }
2093 }
2094
2095 ref2frm[0]=
2096 ref2frm[1]= -1;
2097 for(i=0; i<16; i++)
2098 ref2frm[i+2]= 4*id_list[i]
2099 +(h->ref_list[j][i].reference&3);
2100 ref2frm[18+0]=
2101 ref2frm[18+1]= -1;
2102 for(i=16; i<48; i++)
2103 ref2frm[i+4]= 4*id_list[(i-16)>>1]
2104 +(h->ref_list[j][i].reference&3);
2105 }
2106
2107 h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
2108 h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
2109
2110 s->avctx->refs= h->sps.ref_frame_count;
2111
2112 if(s->avctx->debug&FF_DEBUG_PICT_INFO){
2113 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",
2114 h->slice_num,
2115 (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
2116 first_mb_in_slice,
2117 av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
2118 pps_id, h->frame_num,
2119 s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
2120 h->ref_count[0], h->ref_count[1],
2121 s->qscale,
2122 h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
2123 h->use_weight,
2124 h->use_weight==1 && h->use_weight_chroma ? "c" : "",
2125 h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
2126 );
2127 }
2128
2129 return 0;
2130 }
2131
2132 int ff_h264_get_slice_type(const H264Context *h)
2133 {
2134 switch (h->slice_type) {
2135 case FF_P_TYPE: return 0;
2136 case FF_B_TYPE: return 1;
2137 case FF_I_TYPE: return 2;
2138 case FF_SP_TYPE: return 3;
2139 case FF_SI_TYPE: return 4;
2140 default: return -1;
2141 }
2142 }
2143
2144 static void loop_filter(H264Context *h){
2145 MpegEncContext * const s = &h->s;
2146 uint8_t *dest_y, *dest_cb, *dest_cr;
2147 int linesize, uvlinesize, mb_x, mb_y;
2148 const int end_mb_y= s->mb_y + FRAME_MBAFF;
2149 const int old_slice_type= h->slice_type;
2150
2151 if(h->deblocking_filter) {
2152 for(mb_x= 0; mb_x<s->mb_width; mb_x++){
2153 for(mb_y=end_mb_y - FRAME_MBAFF; mb_y<= end_mb_y; mb_y++){
2154 int mb_xy, mb_type;
2155 mb_xy = h->mb_xy = mb_x + mb_y*s->mb_stride;
2156 h->slice_num= h->slice_table[mb_xy];
2157 mb_type= s->current_picture.mb_type[mb_xy];
2158 h->list_count= h->list_counts[mb_xy];
2159
2160 if(FRAME_MBAFF)
2161 h->mb_mbaff = h->mb_field_decoding_flag = !!IS_INTERLACED(mb_type);
2162
2163 s->mb_x= mb_x;
2164 s->mb_y= mb_y;
2165 dest_y = s->current_picture.data[0] + (mb_x + mb_y * s->linesize ) * 16;
2166 dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2167 dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2168 //FIXME simplify above
2169
2170 if (MB_FIELD) {
2171 linesize = h->mb_linesize = s->linesize * 2;
2172 uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2173 if(mb_y&1){ //FIXME move out of this function?
2174 dest_y -= s->linesize*15;
2175 dest_cb-= s->uvlinesize*7;
2176 dest_cr-= s->uvlinesize*7;
2177 }
2178 } else {
2179 linesize = h->mb_linesize = s->linesize;
2180 uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2181 }
2182 backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0);
2183 if(fill_filter_caches(h, mb_type))
2184 continue;
2185 h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2186 h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2187
2188 if (FRAME_MBAFF) {
2189 ff_h264_filter_mb (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2190 } else {
2191 ff_h264_filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2192 }
2193 }
2194 }
2195 }
2196 h->slice_type= old_slice_type;
2197 s->mb_x= 0;
2198 s->mb_y= end_mb_y - FRAME_MBAFF;
2199 }
2200
2201 static int decode_slice(struct AVCodecContext *avctx, void *arg){
2202 H264Context *h = *(void**)arg;
2203 MpegEncContext * const s = &h->s;
2204 const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
2205
2206 s->mb_skip_run= -1;
2207
2208 h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
2209 (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
2210
2211 if( h->pps.cabac ) {
2212 /* realign */
2213 align_get_bits( &s->gb );
2214
2215 /* init cabac */
2216 ff_init_cabac_states( &h->cabac);
2217 ff_init_cabac_decoder( &h->cabac,
2218 s->gb.buffer + get_bits_count(&s->gb)/8,
2219 (get_bits_left(&s->gb) + 7)/8);
2220
2221 ff_h264_init_cabac_states(h);
2222
2223 for(;;){
2224 //START_TIMER
2225 int ret = ff_h264_decode_mb_cabac(h);
2226 int eos;
2227 //STOP_TIMER("decode_mb_cabac")
2228
2229 if(ret>=0) ff_h264_hl_decode_mb(h);
2230
2231 if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
2232 s->mb_y++;
2233
2234 ret = ff_h264_decode_mb_cabac(h);
2235
2236 if(ret>=0) ff_h264_hl_decode_mb(h);
2237 s->mb_y--;
2238 }
2239 eos = get_cabac_terminate( &h->cabac );
2240
2241 if((s->workaround_bugs & FF_BUG_TRUNCATED) && h->cabac.bytestream > h->cabac.bytestream_end + 2){
2242 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);
2243 return 0;
2244 }
2245 if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
2246 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);
2247 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);
2248 return -1;
2249 }
2250
2251 if( ++s->mb_x >= s->mb_width ) {
2252 s->mb_x = 0;
2253 loop_filter(h);
2254 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2255 ++s->mb_y;
2256 if(FIELD_OR_MBAFF_PICTURE) {
2257 ++s->mb_y;
2258 }
2259 }
2260
2261 if( eos || s->mb_y >= s->mb_height ) {
2262 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2263 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);
2264 return 0;
2265 }
2266 }
2267
2268 } else {
2269 for(;;){
2270 int ret = ff_h264_decode_mb_cavlc(h);
2271
2272 if(ret>=0) ff_h264_hl_decode_mb(h);
2273
2274 if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
2275 s->mb_y++;
2276 ret = ff_h264_decode_mb_cavlc(h);
2277
2278 if(ret>=0) ff_h264_hl_decode_mb(h);
2279 s->mb_y--;
2280 }
2281
2282 if(ret<0){
2283 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2284 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);
2285
2286 return -1;
2287 }
2288
2289 if(++s->mb_x >= s->mb_width){
2290 s->mb_x=0;
2291 loop_filter(h);
2292 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2293 ++s->mb_y;
2294 if(FIELD_OR_MBAFF_PICTURE) {
2295 ++s->mb_y;
2296 }
2297 if(s->mb_y >= s->mb_height){
2298 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2299
2300 if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
2301 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);
2302
2303 return 0;
2304 }else{
2305 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);
2306
2307 return -1;
2308 }
2309 }
2310 }
2311
2312 if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
2313 tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
2314 if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
2315 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);
2316
2317 return 0;
2318 }else{
2319 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);
2320
2321 return -1;
2322 }
2323 }
2324 }
2325 }
2326
2327 #if 0
2328 for(;s->mb_y < s->mb_height; s->mb_y++){
2329 for(;s->mb_x < s->mb_width; s->mb_x++){
2330 int ret= decode_mb(h);
2331
2332 ff_h264_hl_decode_mb(h);
2333
2334 if(ret<0){
2335 av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
2336 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);
2337
2338 return -1;
2339 }
2340
2341 if(++s->mb_x >= s->mb_width){
2342 s->mb_x=0;
2343 if(++s->mb_y >= s->mb_height){
2344 if(get_bits_count(s->gb) == s->gb.size_in_bits){
2345 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);
2346
2347 return 0;
2348 }else{
2349 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);
2350
2351 return -1;
2352 }
2353 }
2354 }
2355
2356 if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
2357 if(get_bits_count(s->gb) == s->gb.size_in_bits){
2358 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);
2359
2360 return 0;
2361 }else{
2362 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);
2363
2364 return -1;
2365 }
2366 }
2367 }
2368 s->mb_x=0;
2369 ff_draw_horiz_band(s, 16*s->mb_y, 16);
2370 }
2371 #endif
2372 return -1; //not reached
2373 }
2374
2375 /**
2376 * Call decode_slice() for each context.
2377 *
2378 * @param h h264 master context
2379 * @param context_count number of contexts to execute
2380 */
2381 static void execute_decode_slices(H264Context *h, int context_count){
2382 MpegEncContext * const s = &h->s;
2383 AVCodecContext * const avctx= s->avctx;
2384 H264Context *hx;
2385 int i;
2386
2387 if (s->avctx->hwaccel)
2388 return;
2389 if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2390 return;
2391 if(context_count == 1) {
2392 decode_slice(avctx, &h);
2393 } else {
2394 for(i = 1; i < context_count; i++) {
2395 hx = h->thread_context[i];
2396 hx->s.error_recognition = avctx->error_recognition;
2397 hx->s.error_count = 0;
2398 }
2399
2400 avctx->execute(avctx, (void *)decode_slice,
2401 h->thread_context, NULL, context_count, sizeof(void*));
2402
2403 /* pull back stuff from slices to master context */
2404 hx = h->thread_context[context_count - 1];
2405 s->mb_x = hx->s.mb_x;
2406 s->mb_y = hx->s.mb_y;
2407 s->dropable = hx->s.dropable;
2408 s->picture_structure = hx->s.picture_structure;
2409 for(i = 1; i < context_count; i++)
2410 h->s.error_count += h->thread_context[i]->s.error_count;
2411 }
2412 }
2413
2414
2415 static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
2416 MpegEncContext * const s = &h->s;
2417 AVCodecContext * const avctx= s->avctx;
2418 int buf_index=0;
2419 H264Context *hx; ///< thread context
2420 int context_count = 0;
2421 int next_avc= h->is_avc ? 0 : buf_size;
2422
2423 h->max_contexts = avctx->thread_count;
2424 #if 0
2425 int i;
2426 for(i=0; i<50; i++){
2427 av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
2428 }
2429 #endif
2430 if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
2431 h->current_slice = 0;
2432 if (!s->first_field)
2433 s->current_picture_ptr= NULL;
2434 ff_h264_reset_sei(h);
2435 }
2436
2437 for(;;){
2438 int consumed;
2439 int dst_length;
2440 int bit_length;
2441 const uint8_t *ptr;
2442 int i, nalsize = 0;
2443 int err;
2444
2445 if(buf_index >= next_avc) {
2446 if(buf_index >= buf_size) break;
2447 nalsize = 0;
2448 for(i = 0; i < h->nal_length_size; i++)
2449 nalsize = (nalsize << 8) | buf[buf_index++];
2450 if(nalsize <= 1 || nalsize > buf_size - buf_index){
2451 if(nalsize == 1){
2452 buf_index++;
2453 continue;
2454 }else{
2455 av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
2456 break;
2457 }
2458 }
2459 next_avc= buf_index + nalsize;
2460 } else {
2461 // start code prefix search
2462 for(; buf_index + 3 < next_avc; buf_index++){
2463 // This should always succeed in the first iteration.
2464 if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
2465 break;
2466 }
2467
2468 if(buf_index+3 >= buf_size) break;
2469
2470 buf_index+=3;
2471 if(buf_index >= next_avc) continue;
2472 }
2473
2474 hx = h->thread_context[context_count];
2475
2476 ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, next_avc - buf_index);
2477 if (ptr==NULL || dst_length < 0){
2478 return -1;
2479 }
2480 i= buf_index + consumed;
2481 if((s->workaround_bugs & FF_BUG_AUTODETECT) && i+3<next_avc &&
2482 buf[i]==0x00 && buf[i+1]==0x00 && buf[i+2]==0x01 && buf[i+3]==0xE0)
2483 s->workaround_bugs |= FF_BUG_TRUNCATED;
2484
2485 if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
2486 while(ptr[dst_length - 1] == 0 && dst_length > 0)
2487 dst_length--;
2488 }
2489 bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
2490
2491 if(s->avctx->debug&FF_DEBUG_STARTCODE){
2492 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);
2493 }
2494
2495 if (h->is_avc && (nalsize != consumed) && nalsize){
2496 av_log(h->s.avctx, AV_LOG_DEBUG, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
2497 }
2498
2499 buf_index += consumed;
2500
2501 if( (s->hurry_up == 1 && h->nal_ref_idc == 0) //FIXME do not discard SEI id
2502 ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
2503 continue;
2504
2505 again:
2506 err = 0;
2507 switch(hx->nal_unit_type){
2508 case NAL_IDR_SLICE:
2509 if (h->nal_unit_type != NAL_IDR_SLICE) {
2510 av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
2511 return -1;
2512 }
2513 idr(h); //FIXME ensure we don't loose some frames if there is reordering
2514 case NAL_SLICE:
2515 init_get_bits(&hx->s.gb, ptr, bit_length);
2516 hx->intra_gb_ptr=
2517 hx->inter_gb_ptr= &hx->s.gb;
2518 hx->s.data_partitioning = 0;
2519
2520 if((err = decode_slice_header(hx, h)))
2521 break;
2522
2523 avctx->profile = hx->sps.profile_idc;
2524 avctx->level = hx->sps.level_idc;
2525
2526 if (s->avctx->hwaccel && h->current_slice == 1) {
2527 if (s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
2528 return -1;
2529 }
2530
2531 s->current_picture_ptr->key_frame |=
2532 (hx->nal_unit_type == NAL_IDR_SLICE) ||
2533 (h->sei_recovery_frame_cnt >= 0);
2534 if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
2535 && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2536 && (avctx->skip_frame < AVDISCARD_BIDIR || hx->slice_type_nos!=FF_B_TYPE)
2537 && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2538 && avctx->skip_frame < AVDISCARD_ALL){
2539 if(avctx->hwaccel) {
2540 if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
2541 return -1;
2542 }else
2543 if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
2544 static const uint8_t start_code[] = {0x00, 0x00, 0x01};
2545 ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
2546 ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
2547 }else
2548 context_count++;
2549 }
2550 break;
2551 case NAL_DPA:
2552 init_get_bits(&hx->s.gb, ptr, bit_length);
2553 hx->intra_gb_ptr=
2554 hx->inter_gb_ptr= NULL;
2555
2556 if ((err = decode_slice_header(hx, h)) < 0)
2557 break;
2558
2559 avctx->profile = hx->sps.profile_idc;
2560 avctx->level = hx->sps.level_idc;
2561
2562 hx->s.data_partitioning = 1;
2563
2564 break;
2565 case NAL_DPB:
2566 init_get_bits(&hx->intra_gb, ptr, bit_length);
2567 hx->intra_gb_ptr= &hx->intra_gb;
2568 break;
2569 case NAL_DPC:
2570 init_get_bits(&hx->inter_gb, ptr, bit_length);
2571 hx->inter_gb_ptr= &hx->inter_gb;
2572
2573 if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
2574 && s->context_initialized
2575 && s->hurry_up < 5
2576 && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
2577 && (avctx->skip_frame < AVDISCARD_BIDIR || hx->slice_type_nos!=FF_B_TYPE)
2578 && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
2579 && avctx->skip_frame < AVDISCARD_ALL)
2580 context_count++;
2581 break;
2582 case NAL_SEI:
2583 init_get_bits(&s->gb, ptr, bit_length);
2584 ff_h264_decode_sei(h);
2585 break;
2586 case NAL_SPS:
2587 init_get_bits(&s->gb, ptr, bit_length);
2588 ff_h264_decode_seq_parameter_set(h);
2589
2590 if(s->flags& CODEC_FLAG_LOW_DELAY)
2591 s->low_delay=1;
2592
2593 if(avctx->has_b_frames < 2)
2594 avctx->has_b_frames= !s->low_delay;
2595 break;
2596 case NAL_PPS:
2597 init_get_bits(&s->gb, ptr, bit_length);
2598
2599 ff_h264_decode_picture_parameter_set(h, bit_length);
2600
2601 break;
2602 case NAL_AUD:
2603 case NAL_END_SEQUENCE:
2604 case NAL_END_STREAM:
2605 case NAL_FILLER_DATA:
2606 case NAL_SPS_EXT:
2607 case NAL_AUXILIARY_SLICE:
2608 break;
2609 default:
2610 av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", hx->nal_unit_type, bit_length);
2611 }
2612
2613 if(context_count == h->max_contexts) {
2614 execute_decode_slices(h, context_count);
2615 context_count = 0;
2616 }
2617
2618 if (err < 0)
2619 av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
2620 else if(err == 1) {
2621 /* Slice could not be decoded in parallel mode, copy down
2622 * NAL unit stuff to context 0 and restart. Note that
2623 * rbsp_buffer is not transferred, but since we no longer
2624 * run in parallel mode this should not be an issue. */
2625 h->nal_unit_type = hx->nal_unit_type;
2626 h->nal_ref_idc = hx->nal_ref_idc;
2627 hx = h;
2628 goto again;
2629 }
2630 }
2631 if(context_count)
2632 execute_decode_slices(h, context_count);
2633 return buf_index;
2634 }
2635
2636 /**
2637 * returns the number of bytes consumed for building the current frame
2638 */
2639 static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
2640 if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
2641 if(pos+10>buf_size) pos=buf_size; // oops ;)
2642
2643 return pos;
2644 }
2645
2646 static int decode_frame(AVCodecContext *avctx,
2647 void *data, int *data_size,
2648 AVPacket *avpkt)
2649 {
2650 const uint8_t *buf = avpkt->data;
2651 int buf_size = avpkt->size;
2652 H264Context *h = avctx->priv_data;
2653 MpegEncContext *s = &h->s;
2654 AVFrame *pict = data;
2655 int buf_index;
2656
2657 s->flags= avctx->flags;
2658 s->flags2= avctx->flags2;
2659
2660 /* end of stream, output what is still in the buffers */
2661 if (buf_size == 0) {
2662 Picture *out;
2663 int i, out_idx;
2664
2665 //FIXME factorize this with the output code below
2666 out = h->delayed_pic[0];
2667 out_idx = 0;
2668 for(i=1; h->delayed_pic[i] && !h->delayed_pic[i]->key_frame && !h->delayed_pic[i]->mmco_reset; i++)
2669 if(h->delayed_pic[i]->poc < out->poc){
2670 out = h->delayed_pic[i];
2671 out_idx = i;
2672 }
2673
2674 for(i=out_idx; h->delayed_pic[i]; i++)
2675 h->delayed_pic[i] = h->delayed_pic[i+1];
2676
2677 if(out){
2678 *data_size = sizeof(AVFrame);
2679 *pict= *(AVFrame*)out;
2680 }
2681
2682 return 0;
2683 }
2684
2685 if(h->is_avc && !h->got_avcC) {
2686 int i, cnt, nalsize;
2687 unsigned char *p = avctx->extradata;
2688 if(avctx->extradata_size < 7) {
2689 av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
2690 return -1;
2691 }
2692 if(*p != 1) {
2693 av_log(avctx, AV_LOG_ERROR, "Unknown avcC version %d\n", *p);
2694 return -1;
2695 }
2696 /* sps and pps in the avcC always have length coded with 2 bytes,
2697 so put a fake nal_length_size = 2 while parsing them */
2698 h->nal_length_size = 2;
2699 // Decode sps from avcC
2700 cnt = *(p+5) & 0x1f; // Number of sps
2701 p += 6;
2702 for (i = 0; i < cnt; i++) {
2703 nalsize = AV_RB16(p) + 2;
2704 if(decode_nal_units(h, p, nalsize) < 0) {
2705 av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
2706 return -1;
2707 }
2708 p += nalsize;
2709 }
2710 // Decode pps from avcC
2711 cnt = *(p++); // Number of pps
2712 for (i = 0; i < cnt; i++) {
2713 nalsize = AV_RB16(p) + 2;
2714 if(decode_nal_units(h, p, nalsize) != nalsize) {
2715 av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
2716 return -1;
2717 }
2718 p += nalsize;
2719 }
2720 // Now store right nal length size, that will be use to parse all other nals
2721 h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
2722 // Do not reparse avcC
2723 h->got_avcC = 1;
2724 }
2725
2726 if(!h->got_avcC && !h->is_avc && s->avctx->extradata_size){
2727 if(decode_nal_units(h, s->avctx->extradata, s->avctx->extradata_size) < 0)
2728 return -1;
2729 h->got_avcC = 1;
2730 }
2731
2732 buf_index=decode_nal_units(h, buf, buf_size);
2733 if(buf_index < 0)
2734 return -1;
2735
2736 if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
2737 if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
2738 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
2739 return -1;
2740 }
2741
2742 if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
2743 Picture *out = s->current_picture_ptr;
2744 Picture *cur = s->current_picture_ptr;
2745 int i, pics, out_of_order, out_idx;
2746
2747 field_end(h);
2748
2749 if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
2750 /* Wait for second field. */
2751 *data_size = 0;
2752
2753 } else {
2754 cur->interlaced_frame = 0;
2755 cur->repeat_pict = 0;
2756
2757 /* Signal interlacing information externally. */
2758 /* Prioritize picture timing SEI information over used decoding process if it exists. */
2759
2760 if(h->sps.pic_struct_present_flag){
2761 switch (h->sei_pic_struct)
2762 {
2763 case SEI_PIC_STRUCT_FRAME:
2764 break;
2765 case SEI_PIC_STRUCT_TOP_FIELD:
2766 case SEI_PIC_STRUCT_BOTTOM_FIELD:
2767 cur->interlaced_frame = 1;
2768 break;
2769 case SEI_PIC_STRUCT_TOP_BOTTOM:
2770 case SEI_PIC_STRUCT_BOTTOM_TOP:
2771 if (FIELD_OR_MBAFF_PICTURE)
2772 cur->interlaced_frame = 1;
2773 else
2774 // try to flag soft telecine progressive
2775 cur->interlaced_frame = h->prev_interlaced_frame;
2776 break;
2777 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
2778 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
2779 // Signal the possibility of telecined film externally (pic_struct 5,6)
2780 // From these hints, let the applications decide if they apply deinterlacing.
2781 cur->repeat_pict = 1;
2782 break;
2783 case SEI_PIC_STRUCT_FRAME_DOUBLING:
2784 // Force progressive here, as doubling interlaced frame is a bad idea.
2785 cur->repeat_pict = 2;