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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / h264.c
CommitLineData
2ba45a60
DM		 1/*
2 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
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
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28#define UNCHECKED_BITSTREAM_READER 1
29
30#include "libavutil/avassert.h"
31#include "libavutil/display.h"
32#include "libavutil/imgutils.h"
33#include "libavutil/opt.h"
34#include "libavutil/stereo3d.h"
35#include "libavutil/timer.h"
36#include "internal.h"
37#include "cabac.h"
38#include "cabac_functions.h"
39#include "error_resilience.h"
40#include "avcodec.h"
41#include "h264.h"
42#include "h264data.h"
43#include "h264chroma.h"
44#include "h264_mvpred.h"
45#include "golomb.h"
46#include "mathops.h"
47#include "me_cmp.h"
48#include "mpegutils.h"
49#include "rectangle.h"
50#include "svq3.h"
51#include "thread.h"
52#include "vdpau_internal.h"
53
54#include <assert.h>
55
56const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
57
58int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx)
59{
60 H264Context *h = avctx->priv_data;
61 return h ? h->sps.num_reorder_frames : 0;
62}
63
64static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
65 int (*mv)[2][4][2],
66 int mb_x, int mb_y, int mb_intra, int mb_skipped)
67{
68 H264Context *h = opaque;
69
70 h->mb_x = mb_x;
71 h->mb_y = mb_y;
72 h->mb_xy = mb_x + mb_y * h->mb_stride;
73 memset(h->non_zero_count_cache, 0, sizeof(h->non_zero_count_cache));
74 av_assert1(ref >= 0);
75 /* FIXME: It is possible albeit uncommon that slice references
76 * differ between slices. We take the easy approach and ignore
77 * it for now. If this turns out to have any relevance in
78 * practice then correct remapping should be added. */
79 if (ref >= h->ref_count[0])
80 ref = 0;
81 if (!h->ref_list[0][ref].f.data[0]) {
82 av_log(h->avctx, AV_LOG_DEBUG, "Reference not available for error concealing\n");
83 ref = 0;
84 }
85 if ((h->ref_list[0][ref].reference&3) != 3) {
86 av_log(h->avctx, AV_LOG_DEBUG, "Reference invalid\n");
87 return;
88 }
89 fill_rectangle(&h->cur_pic.ref_index[0][4 * h->mb_xy],
90 2, 2, 2, ref, 1);
91 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
92 fill_rectangle(h->mv_cache[0][scan8[0]], 4, 4, 8,
93 pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
94 h->mb_mbaff =
95 h->mb_field_decoding_flag = 0;
96 ff_h264_hl_decode_mb(h);
97}
98
99void ff_h264_draw_horiz_band(H264Context *h, int y, int height)
100{
101 AVCodecContext *avctx = h->avctx;
102 AVFrame *cur = &h->cur_pic.f;
103 AVFrame *last = h->ref_list[0][0].f.data[0] ? &h->ref_list[0][0].f : NULL;
104 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
105 int vshift = desc->log2_chroma_h;
106 const int field_pic = h->picture_structure != PICT_FRAME;
107 if (field_pic) {
108 height <<= 1;
109 y <<= 1;
110 }
111
112 height = FFMIN(height, avctx->height - y);
113
114 if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
115 return;
116
117 if (avctx->draw_horiz_band) {
118 AVFrame *src;
119 int offset[AV_NUM_DATA_POINTERS];
120 int i;
121
122 if (cur->pict_type == AV_PICTURE_TYPE_B || h->low_delay ||
123 (avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
124 src = cur;
125 else if (last)
126 src = last;
127 else
128 return;
129
130 offset[0] = y * src->linesize[0];
131 offset[1] =
132 offset[2] = (y >> vshift) * src->linesize[1];
133 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
134 offset[i] = 0;
135
136 emms_c();
137
138 avctx->draw_horiz_band(avctx, src, offset,
139 y, h->picture_structure, height);
140 }
141}
142
143/**
144 * Check if the top & left blocks are available if needed and
145 * change the dc mode so it only uses the available blocks.
146 */
147int ff_h264_check_intra4x4_pred_mode(H264Context *h)
148{
149 static const int8_t top[12] = {
150 -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
151 };
152 static const int8_t left[12] = {
153 0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
154 };
155 int i;
156
157 if (!(h->top_samples_available & 0x8000)) {
158 for (i = 0; i < 4; i++) {
159 int status = top[h->intra4x4_pred_mode_cache[scan8[0] + i]];
160 if (status < 0) {
161 av_log(h->avctx, AV_LOG_ERROR,
162 "top block unavailable for requested intra4x4 mode %d at %d %d\n",
163 status, h->mb_x, h->mb_y);
164 return AVERROR_INVALIDDATA;
165 } else if (status) {
166 h->intra4x4_pred_mode_cache[scan8[0] + i] = status;
167 }
168 }
169 }
170
171 if ((h->left_samples_available & 0x8888) != 0x8888) {
172 static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
173 for (i = 0; i < 4; i++)
174 if (!(h->left_samples_available & mask[i])) {
175 int status = left[h->intra4x4_pred_mode_cache[scan8[0] + 8 * i]];
176 if (status < 0) {
177 av_log(h->avctx, AV_LOG_ERROR,
178 "left block unavailable for requested intra4x4 mode %d at %d %d\n",
179 status, h->mb_x, h->mb_y);
180 return AVERROR_INVALIDDATA;
181 } else if (status) {
182 h->intra4x4_pred_mode_cache[scan8[0] + 8 * i] = status;
183 }
184 }
185 }
186
187 return 0;
188} // FIXME cleanup like ff_h264_check_intra_pred_mode
189
190/**
191 * Check if the top & left blocks are available if needed and
192 * change the dc mode so it only uses the available blocks.
193 */
194int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma)
195{
196 static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 };
197 static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
198
199 if (mode > 3U) {
200 av_log(h->avctx, AV_LOG_ERROR,
201 "out of range intra chroma pred mode at %d %d\n",
202 h->mb_x, h->mb_y);
203 return AVERROR_INVALIDDATA;
204 }
205
206 if (!(h->top_samples_available & 0x8000)) {
207 mode = top[mode];
208 if (mode < 0) {
209 av_log(h->avctx, AV_LOG_ERROR,
210 "top block unavailable for requested intra mode at %d %d\n",
211 h->mb_x, h->mb_y);
212 return AVERROR_INVALIDDATA;
213 }
214 }
215
216 if ((h->left_samples_available & 0x8080) != 0x8080) {
217 mode = left[mode];
218 if (mode < 0) {
219 av_log(h->avctx, AV_LOG_ERROR,
220 "left block unavailable for requested intra mode at %d %d\n",
221 h->mb_x, h->mb_y);
222 return AVERROR_INVALIDDATA;
223 }
224 if (is_chroma && (h->left_samples_available & 0x8080)) {
225 // mad cow disease mode, aka MBAFF + constrained_intra_pred
226 mode = ALZHEIMER_DC_L0T_PRED8x8 +
227 (!(h->left_samples_available & 0x8000)) +
228 2 * (mode == DC_128_PRED8x8);
229 }
230 }
231
232 return mode;
233}
234
235const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
236 int *dst_length, int *consumed, int length)
237{
238 int i, si, di;
239 uint8_t *dst;
240 int bufidx;
241
242 // src[0]&0x80; // forbidden bit
243 h->nal_ref_idc = src[0] >> 5;
244 h->nal_unit_type = src[0] & 0x1F;
245
246 src++;
247 length--;
248
249#define STARTCODE_TEST \
250 if (i + 2 < length && src[i + 1] == 0 && src[i + 2] <= 3) { \
251 if (src[i + 2] != 3 && src[i + 2] != 0) { \
252 /* startcode, so we must be past the end */ \
253 length = i; \
254 } \
255 break; \
256 }
257
258#if HAVE_FAST_UNALIGNED
259#define FIND_FIRST_ZERO \
260 if (i > 0 && !src[i]) \
261 i--; \
262 while (src[i]) \
263 i++
264
265#if HAVE_FAST_64BIT
266 for (i = 0; i + 1 < length; i += 9) {
267 if (!((~AV_RN64A(src + i) &
268 (AV_RN64A(src + i) - 0x0100010001000101ULL)) &
269 0x8000800080008080ULL))
270 continue;
271 FIND_FIRST_ZERO;
272 STARTCODE_TEST;
273 i -= 7;
274 }
275#else
276 for (i = 0; i + 1 < length; i += 5) {
277 if (!((~AV_RN32A(src + i) &
278 (AV_RN32A(src + i) - 0x01000101U)) &
279 0x80008080U))
280 continue;
281 FIND_FIRST_ZERO;
282 STARTCODE_TEST;
283 i -= 3;
284 }
285#endif
286#else
287 for (i = 0; i + 1 < length; i += 2) {
288 if (src[i])
289 continue;
290 if (i > 0 && src[i - 1] == 0)
291 i--;
292 STARTCODE_TEST;
293 }
294#endif
295
296 // use second escape buffer for inter data
297 bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0;
298
299 av_fast_padded_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+MAX_MBPAIR_SIZE);
300 dst = h->rbsp_buffer[bufidx];
301
302 if (!dst)
303 return NULL;
304
305 if(i>=length-1){ //no escaped 0
306 *dst_length= length;
307 *consumed= length+1; //+1 for the header
308 if(h->avctx->flags2 & CODEC_FLAG2_FAST){
309 return src;
310 }else{
311 memcpy(dst, src, length);
312 return dst;
313 }
314 }
315
316 memcpy(dst, src, i);
317 si = di = i;
318 while (si + 2 < length) {
319 // remove escapes (very rare 1:2^22)
320 if (src[si + 2] > 3) {
321 dst[di++] = src[si++];
322 dst[di++] = src[si++];
323 } else if (src[si] == 0 && src[si + 1] == 0 && src[si + 2] != 0) {
324 if (src[si + 2] == 3) { // escape
325 dst[di++] = 0;
326 dst[di++] = 0;
327 si += 3;
328 continue;
329 } else // next start code
330 goto nsc;
331 }
332
333 dst[di++] = src[si++];
334 }
335 while (si < length)
336 dst[di++] = src[si++];
337
338nsc:
339 memset(dst + di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
340
341 *dst_length = di;
342 *consumed = si + 1; // +1 for the header
343 /* FIXME store exact number of bits in the getbitcontext
344 * (it is needed for decoding) */
345 return dst;
346}
347
348/**
349 * Identify the exact end of the bitstream
350 * @return the length of the trailing, or 0 if damaged
351 */
352static int decode_rbsp_trailing(H264Context *h, const uint8_t *src)
353{
354 int v = *src;
355 int r;
356
357 tprintf(h->avctx, "rbsp trailing %X\n", v);
358
359 for (r = 1; r < 9; r++) {
360 if (v & 1)
361 return r;
362 v >>= 1;
363 }
364 return 0;
365}
366
367void ff_h264_free_tables(H264Context *h, int free_rbsp)
368{
369 int i;
370 H264Context *hx;
371
372 av_freep(&h->intra4x4_pred_mode);
373 av_freep(&h->chroma_pred_mode_table);
374 av_freep(&h->cbp_table);
375 av_freep(&h->mvd_table[0]);
376 av_freep(&h->mvd_table[1]);
377 av_freep(&h->direct_table);
378 av_freep(&h->non_zero_count);
379 av_freep(&h->slice_table_base);
380 h->slice_table = NULL;
381 av_freep(&h->list_counts);
382
383 av_freep(&h->mb2b_xy);
384 av_freep(&h->mb2br_xy);
385
386 av_buffer_pool_uninit(&h->qscale_table_pool);
387 av_buffer_pool_uninit(&h->mb_type_pool);
388 av_buffer_pool_uninit(&h->motion_val_pool);
389 av_buffer_pool_uninit(&h->ref_index_pool);
390
391 if (free_rbsp && h->DPB) {
392 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
393 ff_h264_unref_picture(h, &h->DPB[i]);
394 av_freep(&h->DPB);
395 } else if (h->DPB) {
396 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
397 h->DPB[i].needs_realloc = 1;
398 }
399
400 h->cur_pic_ptr = NULL;
401
402 for (i = 0; i < H264_MAX_THREADS; i++) {
403 hx = h->thread_context[i];
404 if (!hx)
405 continue;
406 av_freep(&hx->top_borders[1]);
407 av_freep(&hx->top_borders[0]);
408 av_freep(&hx->bipred_scratchpad);
409 av_freep(&hx->edge_emu_buffer);
410 av_freep(&hx->dc_val_base);
411 av_freep(&hx->er.mb_index2xy);
412 av_freep(&hx->er.error_status_table);
413 av_freep(&hx->er.er_temp_buffer);
414 av_freep(&hx->er.mbintra_table);
415 av_freep(&hx->er.mbskip_table);
416
417 if (free_rbsp) {
418 av_freep(&hx->rbsp_buffer[1]);
419 av_freep(&hx->rbsp_buffer[0]);
420 hx->rbsp_buffer_size[0] = 0;
421 hx->rbsp_buffer_size[1] = 0;
422 }
423 if (i)
424 av_freep(&h->thread_context[i]);
425 }
426}
427
428int ff_h264_alloc_tables(H264Context *h)
429{
430 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
431 const int row_mb_num = 2*h->mb_stride*FFMAX(h->avctx->thread_count, 1);
432 int x, y, i;
433
434 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
435 row_mb_num, 8 * sizeof(uint8_t), fail)
436 FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
437 big_mb_num * 48 * sizeof(uint8_t), fail)
438 FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
439 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
440 FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
441 big_mb_num * sizeof(uint16_t), fail)
442 FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
443 big_mb_num * sizeof(uint8_t), fail)
444 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[0],
445 row_mb_num, 16 * sizeof(uint8_t), fail);
446 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[1],
447 row_mb_num, 16 * sizeof(uint8_t), fail);
448 FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
449 4 * big_mb_num * sizeof(uint8_t), fail);
450 FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
451 big_mb_num * sizeof(uint8_t), fail)
452
453 memset(h->slice_table_base, -1,
454 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
455 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
456
457 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
458 big_mb_num * sizeof(uint32_t), fail);
459 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
460 big_mb_num * sizeof(uint32_t), fail);
461 for (y = 0; y < h->mb_height; y++)
462 for (x = 0; x < h->mb_width; x++) {
463 const int mb_xy = x + y * h->mb_stride;
464 const int b_xy = 4 * x + 4 * y * h->b_stride;
465
466 h->mb2b_xy[mb_xy] = b_xy;
467 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
468 }
469
470 if (!h->dequant4_coeff[0])
471 h264_init_dequant_tables(h);
472
473 if (!h->DPB) {
474 h->DPB = av_mallocz_array(H264_MAX_PICTURE_COUNT, sizeof(*h->DPB));
475 if (!h->DPB)
476 goto fail;
477 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
478 av_frame_unref(&h->DPB[i].f);
479 av_frame_unref(&h->cur_pic.f);
480 }
481
482 return 0;
483
484fail:
485 ff_h264_free_tables(h, 1);
486 return AVERROR(ENOMEM);
487}
488
489/**
490 * Init context
491 * Allocate buffers which are not shared amongst multiple threads.
492 */
493int ff_h264_context_init(H264Context *h)
494{
495 ERContext *er = &h->er;
496 int mb_array_size = h->mb_height * h->mb_stride;
497 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
498 int c_size = h->mb_stride * (h->mb_height + 1);
499 int yc_size = y_size + 2 * c_size;
500 int x, y, i;
501
502 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->top_borders[0],
503 h->mb_width, 16 * 3 * sizeof(uint8_t) * 2, fail)
504 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->top_borders[1],
505 h->mb_width, 16 * 3 * sizeof(uint8_t) * 2, fail)
506
507 h->ref_cache[0][scan8[5] + 1] =
508 h->ref_cache[0][scan8[7] + 1] =
509 h->ref_cache[0][scan8[13] + 1] =
510 h->ref_cache[1][scan8[5] + 1] =
511 h->ref_cache[1][scan8[7] + 1] =
512 h->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
513
514 if (CONFIG_ERROR_RESILIENCE) {
515 /* init ER */
516 er->avctx = h->avctx;
517 er->mecc = &h->mecc;
518 er->decode_mb = h264_er_decode_mb;
519 er->opaque = h;
520 er->quarter_sample = 1;
521
522 er->mb_num = h->mb_num;
523 er->mb_width = h->mb_width;
524 er->mb_height = h->mb_height;
525 er->mb_stride = h->mb_stride;
526 er->b8_stride = h->mb_width * 2 + 1;
527
528 // error resilience code looks cleaner with this
529 FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
530 (h->mb_num + 1) * sizeof(int), fail);
531
532 for (y = 0; y < h->mb_height; y++)
533 for (x = 0; x < h->mb_width; x++)
534 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
535
536 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
537 h->mb_stride + h->mb_width;
538
539 FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
540 mb_array_size * sizeof(uint8_t), fail);
541
542 FF_ALLOC_OR_GOTO(h->avctx, er->mbintra_table, mb_array_size, fail);
543 memset(er->mbintra_table, 1, mb_array_size);
544
545 FF_ALLOCZ_OR_GOTO(h->avctx, er->mbskip_table, mb_array_size + 2, fail);
546
547 FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
548 h->mb_height * h->mb_stride, fail);
549
550 FF_ALLOCZ_OR_GOTO(h->avctx, h->dc_val_base,
551 yc_size * sizeof(int16_t), fail);
552 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
553 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
554 er->dc_val[2] = er->dc_val[1] + c_size;
555 for (i = 0; i < yc_size; i++)
556 h->dc_val_base[i] = 1024;
557 }
558
559 return 0;
560
561fail:
562 return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
563}
564
565static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
566 int parse_extradata);
567
568int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size)
569{
570 AVCodecContext *avctx = h->avctx;
571 int ret;
572
573 if (!buf || size <= 0)
574 return -1;
575
576 if (buf[0] == 1) {
577 int i, cnt, nalsize;
578 const unsigned char *p = buf;
579
580 h->is_avc = 1;
581
582 if (size < 7) {
583 av_log(avctx, AV_LOG_ERROR,
584 "avcC %d too short\n", size);
585 return AVERROR_INVALIDDATA;
586 }
587 /* sps and pps in the avcC always have length coded with 2 bytes,
588 * so put a fake nal_length_size = 2 while parsing them */
589 h->nal_length_size = 2;
590 // Decode sps from avcC
591 cnt = *(p + 5) & 0x1f; // Number of sps
592 p += 6;
593 for (i = 0; i < cnt; i++) {
594 nalsize = AV_RB16(p) + 2;
595 if(nalsize > size - (p-buf))
596 return AVERROR_INVALIDDATA;
597 ret = decode_nal_units(h, p, nalsize, 1);
598 if (ret < 0) {
599 av_log(avctx, AV_LOG_ERROR,
600 "Decoding sps %d from avcC failed\n", i);
601 return ret;
602 }
603 p += nalsize;
604 }
605 // Decode pps from avcC
606 cnt = *(p++); // Number of pps
607 for (i = 0; i < cnt; i++) {
608 nalsize = AV_RB16(p) + 2;
609 if(nalsize > size - (p-buf))
610 return AVERROR_INVALIDDATA;
611 ret = decode_nal_units(h, p, nalsize, 1);
612 if (ret < 0) {
613 av_log(avctx, AV_LOG_ERROR,
614 "Decoding pps %d from avcC failed\n", i);
615 return ret;
616 }
617 p += nalsize;
618 }
619 // Store right nal length size that will be used to parse all other nals
620 h->nal_length_size = (buf[4] & 0x03) + 1;
621 } else {
622 h->is_avc = 0;
623 ret = decode_nal_units(h, buf, size, 1);
624 if (ret < 0)
625 return ret;
626 }
627 return size;
628}
629
630av_cold int ff_h264_decode_init(AVCodecContext *avctx)
631{
632 H264Context *h = avctx->priv_data;
633 int i;
634 int ret;
635
636 h->avctx = avctx;
637
638 h->bit_depth_luma = 8;
639 h->chroma_format_idc = 1;
640
641 h->avctx->bits_per_raw_sample = 8;
642 h->cur_chroma_format_idc = 1;
643
644 ff_h264dsp_init(&h->h264dsp, 8, 1);
645 av_assert0(h->sps.bit_depth_chroma == 0);
646 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
647 ff_h264qpel_init(&h->h264qpel, 8);
648 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, 8, 1);
649
650 h->dequant_coeff_pps = -1;
651 h->current_sps_id = -1;
652
653 /* needed so that IDCT permutation is known early */
654 if (CONFIG_ERROR_RESILIENCE)
655 ff_me_cmp_init(&h->mecc, h->avctx);
656 ff_videodsp_init(&h->vdsp, 8);
657
658 memset(h->pps.scaling_matrix4, 16, 6 * 16 * sizeof(uint8_t));
659 memset(h->pps.scaling_matrix8, 16, 2 * 64 * sizeof(uint8_t));
660
661 h->picture_structure = PICT_FRAME;
662 h->slice_context_count = 1;
663 h->workaround_bugs = avctx->workaround_bugs;
664 h->flags = avctx->flags;
665
666 /* set defaults */
667 // s->decode_mb = ff_h263_decode_mb;
668 if (!avctx->has_b_frames)
669 h->low_delay = 1;
670
671 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
672
673 ff_h264_decode_init_vlc();
674
675 ff_init_cabac_states();
676
677 h->pixel_shift = 0;
678 h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
679
680 h->thread_context[0] = h;
681 h->outputed_poc = h->next_outputed_poc = INT_MIN;
682 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
683 h->last_pocs[i] = INT_MIN;
684 h->prev_poc_msb = 1 << 16;
685 h->prev_frame_num = -1;
686 h->x264_build = -1;
687 h->sei_fpa.frame_packing_arrangement_cancel_flag = -1;
688 ff_h264_reset_sei(h);
689 if (avctx->codec_id == AV_CODEC_ID_H264) {
690 if (avctx->ticks_per_frame == 1) {
691 if(h->avctx->time_base.den < INT_MAX/2) {
692 h->avctx->time_base.den *= 2;
693 } else
694 h->avctx->time_base.num /= 2;
695 }
696 avctx->ticks_per_frame = 2;
697 }
698
699 if (avctx->extradata_size > 0 && avctx->extradata) {
700 ret = ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size);
701 if (ret < 0) {
702 ff_h264_free_context(h);
703 return ret;
704 }
705 }
706
707 if (h->sps.bitstream_restriction_flag &&
708 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
709 h->avctx->has_b_frames = h->sps.num_reorder_frames;
710 h->low_delay = 0;
711 }
712
713 avctx->internal->allocate_progress = 1;
714
715 ff_h264_flush_change(h);
716
717 return 0;
718}
719
720static int decode_init_thread_copy(AVCodecContext *avctx)
721{
722 H264Context *h = avctx->priv_data;
723
724 if (!avctx->internal->is_copy)
725 return 0;
726 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
727 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
728
729 h->rbsp_buffer[0] = NULL;
730 h->rbsp_buffer[1] = NULL;
731 h->rbsp_buffer_size[0] = 0;
732 h->rbsp_buffer_size[1] = 0;
733 h->context_initialized = 0;
734
735 return 0;
736}
737
738/**
739 * Run setup operations that must be run after slice header decoding.
740 * This includes finding the next displayed frame.
741 *
742 * @param h h264 master context
743 * @param setup_finished enough NALs have been read that we can call
744 * ff_thread_finish_setup()
745 */
746static void decode_postinit(H264Context *h, int setup_finished)
747{
748 H264Picture *out = h->cur_pic_ptr;
749 H264Picture *cur = h->cur_pic_ptr;
750 int i, pics, out_of_order, out_idx;
751
752 h->cur_pic_ptr->f.pict_type = h->pict_type;
753
754 if (h->next_output_pic)
755 return;
756
757 if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
758 /* FIXME: if we have two PAFF fields in one packet, we can't start
759 * the next thread here. If we have one field per packet, we can.
760 * The check in decode_nal_units() is not good enough to find this
761 * yet, so we assume the worst for now. */
762 // if (setup_finished)
763 // ff_thread_finish_setup(h->avctx);
764 return;
765 }
766
767 cur->f.interlaced_frame = 0;
768 cur->f.repeat_pict = 0;
769
770 /* Signal interlacing information externally. */
771 /* Prioritize picture timing SEI information over used
772 * decoding process if it exists. */
773
774 if (h->sps.pic_struct_present_flag) {
775 switch (h->sei_pic_struct) {
776 case SEI_PIC_STRUCT_FRAME:
777 break;
778 case SEI_PIC_STRUCT_TOP_FIELD:
779 case SEI_PIC_STRUCT_BOTTOM_FIELD:
780 cur->f.interlaced_frame = 1;
781 break;
782 case SEI_PIC_STRUCT_TOP_BOTTOM:
783 case SEI_PIC_STRUCT_BOTTOM_TOP:
784 if (FIELD_OR_MBAFF_PICTURE(h))
785 cur->f.interlaced_frame = 1;
786 else
787 // try to flag soft telecine progressive
788 cur->f.interlaced_frame = h->prev_interlaced_frame;
789 break;
790 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
791 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
792 /* Signal the possibility of telecined film externally
793 * (pic_struct 5,6). From these hints, let the applications
794 * decide if they apply deinterlacing. */
795 cur->f.repeat_pict = 1;
796 break;
797 case SEI_PIC_STRUCT_FRAME_DOUBLING:
798 cur->f.repeat_pict = 2;
799 break;
800 case SEI_PIC_STRUCT_FRAME_TRIPLING:
801 cur->f.repeat_pict = 4;
802 break;
803 }
804
805 if ((h->sei_ct_type & 3) &&
806 h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
807 cur->f.interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
808 } else {
809 /* Derive interlacing flag from used decoding process. */
810 cur->f.interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
811 }
812 h->prev_interlaced_frame = cur->f.interlaced_frame;
813
814 if (cur->field_poc[0] != cur->field_poc[1]) {
815 /* Derive top_field_first from field pocs. */
816 cur->f.top_field_first = cur->field_poc[0] < cur->field_poc[1];
817 } else {
818 if (cur->f.interlaced_frame || h->sps.pic_struct_present_flag) {
819 /* Use picture timing SEI information. Even if it is a
820 * information of a past frame, better than nothing. */
821 if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
822 h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
823 cur->f.top_field_first = 1;
824 else
825 cur->f.top_field_first = 0;
826 } else {
827 /* Most likely progressive */
828 cur->f.top_field_first = 0;
829 }
830 }
831
832 if (h->sei_frame_packing_present &&
833 h->frame_packing_arrangement_type >= 0 &&
834 h->frame_packing_arrangement_type <= 6 &&
835 h->content_interpretation_type > 0 &&
836 h->content_interpretation_type < 3) {
837 AVStereo3D *stereo = av_stereo3d_create_side_data(&cur->f);
838 if (stereo) {
839 switch (h->frame_packing_arrangement_type) {
840 case 0:
841 stereo->type = AV_STEREO3D_CHECKERBOARD;
842 break;
843 case 1:
844 stereo->type = AV_STEREO3D_COLUMNS;
845 break;
846 case 2:
847 stereo->type = AV_STEREO3D_LINES;
848 break;
849 case 3:
850 if (h->quincunx_subsampling)
851 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
852 else
853 stereo->type = AV_STEREO3D_SIDEBYSIDE;
854 break;
855 case 4:
856 stereo->type = AV_STEREO3D_TOPBOTTOM;
857 break;
858 case 5:
859 stereo->type = AV_STEREO3D_FRAMESEQUENCE;
860 break;
861 case 6:
862 stereo->type = AV_STEREO3D_2D;
863 break;
864 }
865
866 if (h->content_interpretation_type == 2)
867 stereo->flags = AV_STEREO3D_FLAG_INVERT;
868 }
869 }
870
871 if (h->sei_display_orientation_present &&
872 (h->sei_anticlockwise_rotation || h->sei_hflip || h->sei_vflip)) {
873 double angle = h->sei_anticlockwise_rotation * 360 / (double) (1 << 16);
874 AVFrameSideData *rotation = av_frame_new_side_data(&cur->f,
875 AV_FRAME_DATA_DISPLAYMATRIX,
876 sizeof(int32_t) * 9);
877 if (rotation) {
878 av_display_rotation_set((int32_t *)rotation->data, angle);
879 av_display_matrix_flip((int32_t *)rotation->data,
880 h->sei_vflip, h->sei_hflip);
881 }
882 }
883
884 cur->mmco_reset = h->mmco_reset;
885 h->mmco_reset = 0;
886
887 // FIXME do something with unavailable reference frames
888
889 /* Sort B-frames into display order */
890
891 if (h->sps.bitstream_restriction_flag &&
892 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
893 h->avctx->has_b_frames = h->sps.num_reorder_frames;
894 h->low_delay = 0;
895 }
896
897 if (h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
898 !h->sps.bitstream_restriction_flag) {
899 h->avctx->has_b_frames = MAX_DELAYED_PIC_COUNT - 1;
900 h->low_delay = 0;
901 }
902
903 for (i = 0; 1; i++) {
904 if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
905 if(i)
906 h->last_pocs[i-1] = cur->poc;
907 break;
908 } else if(i) {
909 h->last_pocs[i-1]= h->last_pocs[i];
910 }
911 }
912 out_of_order = MAX_DELAYED_PIC_COUNT - i;
913 if( cur->f.pict_type == AV_PICTURE_TYPE_B
914 || (h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > INT_MIN && h->last_pocs[MAX_DELAYED_PIC_COUNT-1] - h->last_pocs[MAX_DELAYED_PIC_COUNT-2] > 2))
915 out_of_order = FFMAX(out_of_order, 1);
916 if (out_of_order == MAX_DELAYED_PIC_COUNT) {
917 av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
918 for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
919 h->last_pocs[i] = INT_MIN;
920 h->last_pocs[0] = cur->poc;
921 cur->mmco_reset = 1;
922 } else if(h->avctx->has_b_frames < out_of_order && !h->sps.bitstream_restriction_flag){
923 av_log(h->avctx, AV_LOG_VERBOSE, "Increasing reorder buffer to %d\n", out_of_order);
924 h->avctx->has_b_frames = out_of_order;
925 h->low_delay = 0;
926 }
927
928 pics = 0;
929 while (h->delayed_pic[pics])
930 pics++;
931
932 av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
933
934 h->delayed_pic[pics++] = cur;
935 if (cur->reference == 0)
936 cur->reference = DELAYED_PIC_REF;
937
938 out = h->delayed_pic[0];
939 out_idx = 0;
940 for (i = 1; h->delayed_pic[i] &&
941 !h->delayed_pic[i]->f.key_frame &&
942 !h->delayed_pic[i]->mmco_reset;
943 i++)
944 if (h->delayed_pic[i]->poc < out->poc) {
945 out = h->delayed_pic[i];
946 out_idx = i;
947 }
948 if (h->avctx->has_b_frames == 0 &&
949 (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset))
950 h->next_outputed_poc = INT_MIN;
951 out_of_order = out->poc < h->next_outputed_poc;
952
953 if (out_of_order || pics > h->avctx->has_b_frames) {
954 out->reference &= ~DELAYED_PIC_REF;
955 // for frame threading, the owner must be the second field's thread or
956 // else the first thread can release the picture and reuse it unsafely
957 for (i = out_idx; h->delayed_pic[i]; i++)
958 h->delayed_pic[i] = h->delayed_pic[i + 1];
959 }
960 if (!out_of_order && pics > h->avctx->has_b_frames) {
961 h->next_output_pic = out;
962 if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset)) {
963 h->next_outputed_poc = INT_MIN;
964 } else
965 h->next_outputed_poc = out->poc;
966 } else {
967 av_log(h->avctx, AV_LOG_DEBUG, "no picture %s\n", out_of_order ? "ooo" : "");
968 }
969
970 if (h->next_output_pic) {
971 if (h->next_output_pic->recovered) {
972 // We have reached an recovery point and all frames after it in
973 // display order are "recovered".
974 h->frame_recovered |= FRAME_RECOVERED_SEI;
975 }
976 h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
977 }
978
979 if (setup_finished && !h->avctx->hwaccel)
980 ff_thread_finish_setup(h->avctx);
981}
982
983int ff_pred_weight_table(H264Context *h)
984{
985 int list, i;
986 int luma_def, chroma_def;
987
988 h->use_weight = 0;
989 h->use_weight_chroma = 0;
990 h->luma_log2_weight_denom = get_ue_golomb(&h->gb);
991 if (h->sps.chroma_format_idc)
992 h->chroma_log2_weight_denom = get_ue_golomb(&h->gb);
993 luma_def = 1 << h->luma_log2_weight_denom;
994 chroma_def = 1 << h->chroma_log2_weight_denom;
995
996 for (list = 0; list < 2; list++) {
997 h->luma_weight_flag[list] = 0;
998 h->chroma_weight_flag[list] = 0;
999 for (i = 0; i < h->ref_count[list]; i++) {
1000 int luma_weight_flag, chroma_weight_flag;
1001
1002 luma_weight_flag = get_bits1(&h->gb);
1003 if (luma_weight_flag) {
1004 h->luma_weight[i][list][0] = get_se_golomb(&h->gb);
1005 h->luma_weight[i][list][1] = get_se_golomb(&h->gb);
1006 if (h->luma_weight[i][list][0] != luma_def ||
1007 h->luma_weight[i][list][1] != 0) {
1008 h->use_weight = 1;
1009 h->luma_weight_flag[list] = 1;
1010 }
1011 } else {
1012 h->luma_weight[i][list][0] = luma_def;
1013 h->luma_weight[i][list][1] = 0;
1014 }
1015
1016 if (h->sps.chroma_format_idc) {
1017 chroma_weight_flag = get_bits1(&h->gb);
1018 if (chroma_weight_flag) {
1019 int j;
1020 for (j = 0; j < 2; j++) {
1021 h->chroma_weight[i][list][j][0] = get_se_golomb(&h->gb);
1022 h->chroma_weight[i][list][j][1] = get_se_golomb(&h->gb);
1023 if (h->chroma_weight[i][list][j][0] != chroma_def ||
1024 h->chroma_weight[i][list][j][1] != 0) {
1025 h->use_weight_chroma = 1;
1026 h->chroma_weight_flag[list] = 1;
1027 }
1028 }
1029 } else {
1030 int j;
1031 for (j = 0; j < 2; j++) {
1032 h->chroma_weight[i][list][j][0] = chroma_def;
1033 h->chroma_weight[i][list][j][1] = 0;
1034 }
1035 }
1036 }
1037 }
1038 if (h->slice_type_nos != AV_PICTURE_TYPE_B)
1039 break;
1040 }
1041 h->use_weight = h->use_weight || h->use_weight_chroma;
1042 return 0;
1043}
1044
1045/**
1046 * instantaneous decoder refresh.
1047 */
1048static void idr(H264Context *h)
1049{
1050 int i;
1051 ff_h264_remove_all_refs(h);
1052 h->prev_frame_num =
1053 h->prev_frame_num_offset = 0;
1054 h->prev_poc_msb = 1<<16;
1055 h->prev_poc_lsb = 0;
1056 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1057 h->last_pocs[i] = INT_MIN;
1058}
1059
1060/* forget old pics after a seek */
1061void ff_h264_flush_change(H264Context *h)
1062{
1063 int i, j;
1064
1065 h->outputed_poc = h->next_outputed_poc = INT_MIN;
1066 h->prev_interlaced_frame = 1;
1067 idr(h);
1068
1069 h->prev_frame_num = -1;
1070 if (h->cur_pic_ptr) {
1071 h->cur_pic_ptr->reference = 0;
1072 for (j=i=0; h->delayed_pic[i]; i++)
1073 if (h->delayed_pic[i] != h->cur_pic_ptr)
1074 h->delayed_pic[j++] = h->delayed_pic[i];
1075 h->delayed_pic[j] = NULL;
1076 }
1077 h->first_field = 0;
1078 memset(h->ref_list[0], 0, sizeof(h->ref_list[0]));
1079 memset(h->ref_list[1], 0, sizeof(h->ref_list[1]));
1080 memset(h->default_ref_list[0], 0, sizeof(h->default_ref_list[0]));
1081 memset(h->default_ref_list[1], 0, sizeof(h->default_ref_list[1]));
1082 ff_h264_reset_sei(h);
1083 h->recovery_frame = -1;
1084 h->frame_recovered = 0;
1085 h->list_count = 0;
1086 h->current_slice = 0;
1087 h->mmco_reset = 1;
1088}
1089
1090/* forget old pics after a seek */
1091static void flush_dpb(AVCodecContext *avctx)
1092{
1093 H264Context *h = avctx->priv_data;
1094 int i;
1095
1096 for (i = 0; i <= MAX_DELAYED_PIC_COUNT; i++) {
1097 if (h->delayed_pic[i])
1098 h->delayed_pic[i]->reference = 0;
1099 h->delayed_pic[i] = NULL;
1100 }
1101
1102 ff_h264_flush_change(h);
1103
1104 if (h->DPB)
1105 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
1106 ff_h264_unref_picture(h, &h->DPB[i]);
1107 h->cur_pic_ptr = NULL;
1108 ff_h264_unref_picture(h, &h->cur_pic);
1109
1110 h->mb_x = h->mb_y = 0;
1111
1112 h->parse_context.state = -1;
1113 h->parse_context.frame_start_found = 0;
1114 h->parse_context.overread = 0;
1115 h->parse_context.overread_index = 0;
1116 h->parse_context.index = 0;
1117 h->parse_context.last_index = 0;
1118
1119 ff_h264_free_tables(h, 1);
1120 h->context_initialized = 0;
1121}
1122
1123int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
1124{
1125 const int max_frame_num = 1 << h->sps.log2_max_frame_num;
1126 int field_poc[2];
1127
1128 h->frame_num_offset = h->prev_frame_num_offset;
1129 if (h->frame_num < h->prev_frame_num)
1130 h->frame_num_offset += max_frame_num;
1131
1132 if (h->sps.poc_type == 0) {
1133 const int max_poc_lsb = 1 << h->sps.log2_max_poc_lsb;
1134
1135 if (h->poc_lsb < h->prev_poc_lsb &&
1136 h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb / 2)
1137 h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1138 else if (h->poc_lsb > h->prev_poc_lsb &&
1139 h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb / 2)
1140 h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1141 else
1142 h->poc_msb = h->prev_poc_msb;
1143 field_poc[0] =
1144 field_poc[1] = h->poc_msb + h->poc_lsb;
1145 if (h->picture_structure == PICT_FRAME)
1146 field_poc[1] += h->delta_poc_bottom;
1147 } else if (h->sps.poc_type == 1) {
1148 int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1149 int i;
1150
1151 if (h->sps.poc_cycle_length != 0)
1152 abs_frame_num = h->frame_num_offset + h->frame_num;
1153 else
1154 abs_frame_num = 0;
1155
1156 if (h->nal_ref_idc == 0 && abs_frame_num > 0)
1157 abs_frame_num--;
1158
1159 expected_delta_per_poc_cycle = 0;
1160 for (i = 0; i < h->sps.poc_cycle_length; i++)
1161 // FIXME integrate during sps parse
1162 expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[i];
1163
1164 if (abs_frame_num > 0) {
1165 int poc_cycle_cnt = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1166 int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1167
1168 expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1169 for (i = 0; i <= frame_num_in_poc_cycle; i++)
1170 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[i];
1171 } else
1172 expectedpoc = 0;
1173
1174 if (h->nal_ref_idc == 0)
1175 expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1176
1177 field_poc[0] = expectedpoc + h->delta_poc[0];
1178 field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1179
1180 if (h->picture_structure == PICT_FRAME)
1181 field_poc[1] += h->delta_poc[1];
1182 } else {
1183 int poc = 2 * (h->frame_num_offset + h->frame_num);
1184
1185 if (!h->nal_ref_idc)
1186 poc--;
1187
1188 field_poc[0] = poc;
1189 field_poc[1] = poc;
1190 }
1191
1192 if (h->picture_structure != PICT_BOTTOM_FIELD)
1193 pic_field_poc[0] = field_poc[0];
1194 if (h->picture_structure != PICT_TOP_FIELD)
1195 pic_field_poc[1] = field_poc[1];
1196 *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
1197
1198 return 0;
1199}
1200
1201/**
1202 * Compute profile from profile_idc and constraint_set?_flags.
1203 *
1204 * @param sps SPS
1205 *
1206 * @return profile as defined by FF_PROFILE_H264_*
1207 */
1208int ff_h264_get_profile(SPS *sps)
1209{
1210 int profile = sps->profile_idc;
1211
1212 switch (sps->profile_idc) {
1213 case FF_PROFILE_H264_BASELINE:
1214 // constraint_set1_flag set to 1
1215 profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
1216 break;
1217 case FF_PROFILE_H264_HIGH_10:
1218 case FF_PROFILE_H264_HIGH_422:
1219 case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1220 // constraint_set3_flag set to 1
1221 profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
1222 break;
1223 }
1224
1225 return profile;
1226}
1227
1228int ff_h264_set_parameter_from_sps(H264Context *h)
1229{
1230 if (h->flags & CODEC_FLAG_LOW_DELAY ||
1231 (h->sps.bitstream_restriction_flag &&
1232 !h->sps.num_reorder_frames)) {
1233 if (h->avctx->has_b_frames > 1 || h->delayed_pic[0])
1234 av_log(h->avctx, AV_LOG_WARNING, "Delayed frames seen. "
1235 "Reenabling low delay requires a codec flush.\n");
1236 else
1237 h->low_delay = 1;
1238 }
1239
1240 if (h->avctx->has_b_frames < 2)
1241 h->avctx->has_b_frames = !h->low_delay;
1242
1243 if (h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
1244 h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
1245 if (h->avctx->codec &&
1246 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU &&
1247 (h->sps.bit_depth_luma != 8 || h->sps.chroma_format_idc > 1)) {
1248 av_log(h->avctx, AV_LOG_ERROR,
1249 "VDPAU decoding does not support video colorspace.\n");
1250 return AVERROR_INVALIDDATA;
1251 }
1252 if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 14 &&
1253 h->sps.bit_depth_luma != 11 && h->sps.bit_depth_luma != 13) {
1254 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
1255 h->cur_chroma_format_idc = h->sps.chroma_format_idc;
1256 h->pixel_shift = h->sps.bit_depth_luma > 8;
1257
1258 ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma,
1259 h->sps.chroma_format_idc);
1260 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
1261 ff_h264qpel_init(&h->h264qpel, h->sps.bit_depth_luma);
1262 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
1263 h->sps.chroma_format_idc);
1264
1265 if (CONFIG_ERROR_RESILIENCE)
1266 ff_me_cmp_init(&h->mecc, h->avctx);
1267 ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);
1268 } else {
1269 av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth %d\n",
1270 h->sps.bit_depth_luma);
1271 return AVERROR_INVALIDDATA;
1272 }
1273 }
1274 return 0;
1275}
1276
1277int ff_set_ref_count(H264Context *h)
1278{
1279 int ref_count[2], list_count;
1280 int num_ref_idx_active_override_flag;
1281
1282 // set defaults, might be overridden a few lines later
1283 ref_count[0] = h->pps.ref_count[0];
1284 ref_count[1] = h->pps.ref_count[1];
1285
1286 if (h->slice_type_nos != AV_PICTURE_TYPE_I) {
1287 unsigned max[2];
1288 max[0] = max[1] = h->picture_structure == PICT_FRAME ? 15 : 31;
1289
1290 if (h->slice_type_nos == AV_PICTURE_TYPE_B)
1291 h->direct_spatial_mv_pred = get_bits1(&h->gb);
1292 num_ref_idx_active_override_flag = get_bits1(&h->gb);
1293
1294 if (num_ref_idx_active_override_flag) {
1295 ref_count[0] = get_ue_golomb(&h->gb) + 1;
1296 if (h->slice_type_nos == AV_PICTURE_TYPE_B) {
1297 ref_count[1] = get_ue_golomb(&h->gb) + 1;
1298 } else
1299 // full range is spec-ok in this case, even for frames
1300 ref_count[1] = 1;
1301 }
1302
1303 if (ref_count[0]-1 > max[0] || ref_count[1]-1 > max[1]){
1304 av_log(h->avctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n", ref_count[0]-1, max[0], ref_count[1]-1, max[1]);
1305 h->ref_count[0] = h->ref_count[1] = 0;
1306 h->list_count = 0;
1307 return AVERROR_INVALIDDATA;
1308 }
1309
1310 if (h->slice_type_nos == AV_PICTURE_TYPE_B)
1311 list_count = 2;
1312 else
1313 list_count = 1;
1314 } else {
1315 list_count = 0;
1316 ref_count[0] = ref_count[1] = 0;
1317 }
1318
1319 if (list_count != h->list_count ||
1320 ref_count[0] != h->ref_count[0] ||
1321 ref_count[1] != h->ref_count[1]) {
1322 h->ref_count[0] = ref_count[0];
1323 h->ref_count[1] = ref_count[1];
1324 h->list_count = list_count;
1325 return 1;
1326 }
1327
1328 return 0;
1329}
1330
1331static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
1332
1333static int get_bit_length(H264Context *h, const uint8_t *buf,
1334 const uint8_t *ptr, int dst_length,
1335 int i, int next_avc)
1336{
1337 if ((h->workaround_bugs & FF_BUG_AUTODETECT) && i + 3 < next_avc &&
1338 buf[i] == 0x00 && buf[i + 1] == 0x00 &&
1339 buf[i + 2] == 0x01 && buf[i + 3] == 0xE0)
1340 h->workaround_bugs |= FF_BUG_TRUNCATED;
1341
1342 if (!(h->workaround_bugs & FF_BUG_TRUNCATED))
1343 while (dst_length > 0 && ptr[dst_length - 1] == 0)
1344 dst_length--;
1345
1346 if (!dst_length)
1347 return 0;
1348
1349 return 8 * dst_length - decode_rbsp_trailing(h, ptr + dst_length - 1);
1350}
1351
1352static int get_last_needed_nal(H264Context *h, const uint8_t *buf, int buf_size)
1353{
1354 int next_avc = h->is_avc ? 0 : buf_size;
1355 int nal_index = 0;
1356 int buf_index = 0;
1357 int nals_needed = 0;
1358 int first_slice = 0;
1359
1360 while(1) {
1361 int nalsize = 0;
1362 int dst_length, bit_length, consumed;
1363 const uint8_t *ptr;
1364
1365 if (buf_index >= next_avc) {
1366 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1367 if (nalsize < 0)
1368 break;
1369 next_avc = buf_index + nalsize;
1370 } else {
1371 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1372 if (buf_index >= buf_size)
1373 break;
1374 if (buf_index >= next_avc)
1375 continue;
1376 }
1377
1378 ptr = ff_h264_decode_nal(h, buf + buf_index, &dst_length, &consumed,
1379 next_avc - buf_index);
1380
1381 if (!ptr || dst_length < 0)
1382 return AVERROR_INVALIDDATA;
1383
1384 buf_index += consumed;
1385
1386 bit_length = get_bit_length(h, buf, ptr, dst_length,
1387 buf_index, next_avc);
1388 nal_index++;
1389
1390 /* packets can sometimes contain multiple PPS/SPS,
1391 * e.g. two PAFF field pictures in one packet, or a demuxer
1392 * which splits NALs strangely if so, when frame threading we
1393 * can't start the next thread until we've read all of them */
1394 switch (h->nal_unit_type) {
1395 case NAL_SPS:
1396 case NAL_PPS:
1397 nals_needed = nal_index;
1398 break;
1399 case NAL_DPA:
1400 case NAL_IDR_SLICE:
1401 case NAL_SLICE:
1402 init_get_bits(&h->gb, ptr, bit_length);
1403 if (!get_ue_golomb(&h->gb) ||
1404 !first_slice ||
1405 first_slice != h->nal_unit_type)
1406 nals_needed = nal_index;
1407 if (!first_slice)
1408 first_slice = h->nal_unit_type;
1409 }
1410 }
1411
1412 return nals_needed;
1413}
1414
1415static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
1416 int parse_extradata)
1417{
1418 AVCodecContext *const avctx = h->avctx;
1419 H264Context *hx; ///< thread context
1420 int buf_index;
1421 unsigned context_count;
1422 int next_avc;
1423 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
1424 int nal_index;
1425 int idr_cleared=0;
1426 int ret = 0;
1427
1428 h->nal_unit_type= 0;
1429
1430 if(!h->slice_context_count)
1431 h->slice_context_count= 1;
1432 h->max_contexts = h->slice_context_count;
1433 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS)) {
1434 h->current_slice = 0;
1435 if (!h->first_field)
1436 h->cur_pic_ptr = NULL;
1437 ff_h264_reset_sei(h);
1438 }
1439
1440 if (h->nal_length_size == 4) {
1441 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
1442 h->is_avc = 0;
1443 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
1444 h->is_avc = 1;
1445 }
1446
1447 if (avctx->active_thread_type & FF_THREAD_FRAME)
1448 nals_needed = get_last_needed_nal(h, buf, buf_size);
1449
1450 {
1451 buf_index = 0;
1452 context_count = 0;
1453 next_avc = h->is_avc ? 0 : buf_size;
1454 nal_index = 0;
1455 for (;;) {
1456 int consumed;
1457 int dst_length;
1458 int bit_length;
1459 const uint8_t *ptr;
1460 int nalsize = 0;
1461 int err;
1462
1463 if (buf_index >= next_avc) {
1464 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1465 if (nalsize < 0)
1466 break;
1467 next_avc = buf_index + nalsize;
1468 } else {
1469 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1470 if (buf_index >= buf_size)
1471 break;
1472 if (buf_index >= next_avc)
1473 continue;
1474 }
1475
1476 hx = h->thread_context[context_count];
1477
1478 ptr = ff_h264_decode_nal(hx, buf + buf_index, &dst_length,
1479 &consumed, next_avc - buf_index);
1480 if (!ptr || dst_length < 0) {
1481 ret = -1;
1482 goto end;
1483 }
1484
1485 bit_length = get_bit_length(h, buf, ptr, dst_length,
1486 buf_index + consumed, next_avc);
1487
1488 if (h->avctx->debug & FF_DEBUG_STARTCODE)
1489 av_log(h->avctx, AV_LOG_DEBUG,
1490 "NAL %d/%d at %d/%d length %d\n",
1491 hx->nal_unit_type, hx->nal_ref_idc, buf_index, buf_size, dst_length);
1492
1493 if (h->is_avc && (nalsize != consumed) && nalsize)
1494 av_log(h->avctx, AV_LOG_DEBUG,
1495 "AVC: Consumed only %d bytes instead of %d\n",
1496 consumed, nalsize);
1497
1498 buf_index += consumed;
1499 nal_index++;
1500
1501 if (avctx->skip_frame >= AVDISCARD_NONREF &&
1502 h->nal_ref_idc == 0 &&
1503 h->nal_unit_type != NAL_SEI)
1504 continue;
1505
1506again:
1507 if ( !(avctx->active_thread_type & FF_THREAD_FRAME)
1508 || nals_needed >= nal_index)
1509 h->au_pps_id = -1;
1510 /* Ignore per frame NAL unit type during extradata
1511 * parsing. Decoding slices is not possible in codec init
1512 * with frame-mt */
1513 if (parse_extradata) {
1514 switch (hx->nal_unit_type) {
1515 case NAL_IDR_SLICE:
1516 case NAL_SLICE:
1517 case NAL_DPA:
1518 case NAL_DPB:
1519 case NAL_DPC:
1520 av_log(h->avctx, AV_LOG_WARNING,
1521 "Ignoring NAL %d in global header/extradata\n",
1522 hx->nal_unit_type);
1523 // fall through to next case
1524 case NAL_AUXILIARY_SLICE:
1525 hx->nal_unit_type = NAL_FF_IGNORE;
1526 }
1527 }
1528
1529 err = 0;
1530
1531 switch (hx->nal_unit_type) {
1532 case NAL_IDR_SLICE:
1533 if ((ptr[0] & 0xFC) == 0x98) {
1534 av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
1535 h->next_outputed_poc = INT_MIN;
1536 ret = -1;
1537 goto end;
1538 }
1539 if (h->nal_unit_type != NAL_IDR_SLICE) {
1540 av_log(h->avctx, AV_LOG_ERROR,
1541 "Invalid mix of idr and non-idr slices\n");
1542 ret = -1;
1543 goto end;
1544 }
1545 if(!idr_cleared)
1546 idr(h); // FIXME ensure we don't lose some frames if there is reordering
1547 idr_cleared = 1;
1548 h->has_recovery_point = 1;
1549 case NAL_SLICE:
1550 init_get_bits(&hx->gb, ptr, bit_length);
1551 hx->intra_gb_ptr =
1552 hx->inter_gb_ptr = &hx->gb;
1553 hx->data_partitioning = 0;
1554
1555 if ((err = ff_h264_decode_slice_header(hx, h)))
1556 break;
1557
1558 if (h->sei_recovery_frame_cnt >= 0) {
1559 if (h->frame_num != h->sei_recovery_frame_cnt || hx->slice_type_nos != AV_PICTURE_TYPE_I)
1560 h->valid_recovery_point = 1;
1561
1562 if ( h->recovery_frame < 0
1563 || ((h->recovery_frame - h->frame_num) & ((1 << h->sps.log2_max_frame_num)-1)) > h->sei_recovery_frame_cnt) {
1564 h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) &
1565 ((1 << h->sps.log2_max_frame_num) - 1);
1566
1567 if (!h->valid_recovery_point)
1568 h->recovery_frame = h->frame_num;
1569 }
1570 }
1571
1572 h->cur_pic_ptr->f.key_frame |=
1573 (hx->nal_unit_type == NAL_IDR_SLICE);
1574
1575 if (hx->nal_unit_type == NAL_IDR_SLICE ||
1576 h->recovery_frame == h->frame_num) {
1577 h->recovery_frame = -1;
1578 h->cur_pic_ptr->recovered = 1;
1579 }
1580 // If we have an IDR, all frames after it in decoded order are
1581 // "recovered".
1582 if (hx->nal_unit_type == NAL_IDR_SLICE)
1583 h->frame_recovered |= FRAME_RECOVERED_IDR;
1584 h->frame_recovered |= 3*!!(avctx->flags2 & CODEC_FLAG2_SHOW_ALL);
1585 h->frame_recovered |= 3*!!(avctx->flags & CODEC_FLAG_OUTPUT_CORRUPT);
1586#if 1
1587 h->cur_pic_ptr->recovered |= h->frame_recovered;
1588#else
1589 h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
1590#endif
1591
1592 if (h->current_slice == 1) {
1593 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS))
1594 decode_postinit(h, nal_index >= nals_needed);
1595
1596 if (h->avctx->hwaccel &&
1597 (ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0)) < 0)
1598 return ret;
1599 if (CONFIG_H264_VDPAU_DECODER &&
1600 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
1601 ff_vdpau_h264_picture_start(h);
1602 }
1603
1604 if (hx->redundant_pic_count == 0) {
1605 if (avctx->hwaccel) {
1606 ret = avctx->hwaccel->decode_slice(avctx,
1607 &buf[buf_index - consumed],
1608 consumed);
1609 if (ret < 0)
1610 return ret;
1611 } else if (CONFIG_H264_VDPAU_DECODER &&
1612 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
1613 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0],
1614 start_code,
1615 sizeof(start_code));
1616 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0],
1617 &buf[buf_index - consumed],
1618 consumed);
1619 } else
1620 context_count++;
1621 }
1622 break;
1623 case NAL_DPA:
1624 if (h->avctx->flags & CODEC_FLAG2_CHUNKS) {
1625 av_log(h->avctx, AV_LOG_ERROR,
1626 "Decoding in chunks is not supported for "
1627 "partitioned slices.\n");
1628 return AVERROR(ENOSYS);
1629 }
1630
1631 init_get_bits(&hx->gb, ptr, bit_length);
1632 hx->intra_gb_ptr =
1633 hx->inter_gb_ptr = NULL;
1634
1635 if ((err = ff_h264_decode_slice_header(hx, h))) {
1636 /* make sure data_partitioning is cleared if it was set
1637 * before, so we don't try decoding a slice without a valid
1638 * slice header later */
1639 h->data_partitioning = 0;
1640 break;
1641 }
1642
1643 hx->data_partitioning = 1;
1644 break;
1645 case NAL_DPB:
1646 init_get_bits(&hx->intra_gb, ptr, bit_length);
1647 hx->intra_gb_ptr = &hx->intra_gb;
1648 break;
1649 case NAL_DPC:
1650 init_get_bits(&hx->inter_gb, ptr, bit_length);
1651 hx->inter_gb_ptr = &hx->inter_gb;
1652
1653 av_log(h->avctx, AV_LOG_ERROR, "Partitioned H.264 support is incomplete\n");
1654 break;
1655
1656 if (hx->redundant_pic_count == 0 &&
1657 hx->intra_gb_ptr &&
1658 hx->data_partitioning &&
1659 h->cur_pic_ptr && h->context_initialized &&
1660 (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc) &&
1661 (avctx->skip_frame < AVDISCARD_BIDIR ||
1662 hx->slice_type_nos != AV_PICTURE_TYPE_B) &&
1663 (avctx->skip_frame < AVDISCARD_NONINTRA ||
1664 hx->slice_type_nos == AV_PICTURE_TYPE_I) &&
1665 avctx->skip_frame < AVDISCARD_ALL)
1666 context_count++;
1667 break;
1668 case NAL_SEI:
1669 init_get_bits(&h->gb, ptr, bit_length);
1670 ret = ff_h264_decode_sei(h);
1671 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1672 goto end;
1673 break;
1674 case NAL_SPS:
1675 init_get_bits(&h->gb, ptr, bit_length);
1676 if (ff_h264_decode_seq_parameter_set(h) < 0 && (h->is_avc ? nalsize : 1)) {
1677 av_log(h->avctx, AV_LOG_DEBUG,
1678 "SPS decoding failure, trying again with the complete NAL\n");
1679 if (h->is_avc)
1680 av_assert0(next_avc - buf_index + consumed == nalsize);
1681 if ((next_avc - buf_index + consumed - 1) >= INT_MAX/8)
1682 break;
1683 init_get_bits(&h->gb, &buf[buf_index + 1 - consumed],
1684 8*(next_avc - buf_index + consumed - 1));
1685 ff_h264_decode_seq_parameter_set(h);
1686 }
1687
1688 break;
1689 case NAL_PPS:
1690 init_get_bits(&h->gb, ptr, bit_length);
1691 ret = ff_h264_decode_picture_parameter_set(h, bit_length);
1692 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1693 goto end;
1694 break;
1695 case NAL_AUD:
1696 case NAL_END_SEQUENCE:
1697 case NAL_END_STREAM:
1698 case NAL_FILLER_DATA:
1699 case NAL_SPS_EXT:
1700 case NAL_AUXILIARY_SLICE:
1701 break;
1702 case NAL_FF_IGNORE:
1703 break;
1704 default:
1705 av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
1706 hx->nal_unit_type, bit_length);
1707 }
1708
1709 if (context_count == h->max_contexts) {
1710 ret = ff_h264_execute_decode_slices(h, context_count);
1711 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1712 goto end;
1713 context_count = 0;
1714 }
1715
1716 if (err < 0 || err == SLICE_SKIPED) {
1717 if (err < 0)
1718 av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
1719 h->ref_count[0] = h->ref_count[1] = h->list_count = 0;
1720 } else if (err == SLICE_SINGLETHREAD) {
1721 /* Slice could not be decoded in parallel mode, copy down
1722 * NAL unit stuff to context 0 and restart. Note that
1723 * rbsp_buffer is not transferred, but since we no longer
1724 * run in parallel mode this should not be an issue. */
1725 h->nal_unit_type = hx->nal_unit_type;
1726 h->nal_ref_idc = hx->nal_ref_idc;
1727 hx = h;
1728 goto again;
1729 }
1730 }
1731 }
1732 if (context_count) {
1733 ret = ff_h264_execute_decode_slices(h, context_count);
1734 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1735 goto end;
1736 }
1737
1738 ret = 0;
1739end:
1740 /* clean up */
1741 if (h->cur_pic_ptr && !h->droppable) {
1742 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1743 h->picture_structure == PICT_BOTTOM_FIELD);
1744 }
1745
1746 return (ret < 0) ? ret : buf_index;
1747}
1748
1749/**
1750 * Return the number of bytes consumed for building the current frame.
1751 */
1752static int get_consumed_bytes(int pos, int buf_size)
1753{
1754 if (pos == 0)
1755 pos = 1; // avoid infinite loops (I doubt that is needed but...)
1756 if (pos + 10 > buf_size)
1757 pos = buf_size; // oops ;)
1758
1759 return pos;
1760}
1761
1762static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
1763{
1764 AVFrame *src = &srcp->f;
1765 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
1766 int i;
1767 int ret = av_frame_ref(dst, src);
1768 if (ret < 0)
1769 return ret;
1770
1771 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(h), 0);
1772
1773 if (srcp->sei_recovery_frame_cnt == 0)
1774 dst->key_frame = 1;
1775 if (!srcp->crop)
1776 return 0;
1777
1778 for (i = 0; i < desc->nb_components; i++) {
1779 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
1780 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
1781 int off = ((srcp->crop_left >> hshift) << h->pixel_shift) +
1782 (srcp->crop_top >> vshift) * dst->linesize[i];
1783 dst->data[i] += off;
1784 }
1785 return 0;
1786}
1787
1788static int is_extra(const uint8_t *buf, int buf_size)
1789{
1790 int cnt= buf[5]&0x1f;
1791 const uint8_t *p= buf+6;
1792 while(cnt--){
1793 int nalsize= AV_RB16(p) + 2;
1794 if(nalsize > buf_size - (p-buf) || p[2]!=0x67)
1795 return 0;
1796 p += nalsize;
1797 }
1798 cnt = *(p++);
1799 if(!cnt)
1800 return 0;
1801 while(cnt--){
1802 int nalsize= AV_RB16(p) + 2;
1803 if(nalsize > buf_size - (p-buf) || p[2]!=0x68)
1804 return 0;
1805 p += nalsize;
1806 }
1807 return 1;
1808}
1809
1810static int h264_decode_frame(AVCodecContext *avctx, void *data,
1811 int *got_frame, AVPacket *avpkt)
1812{
1813 const uint8_t *buf = avpkt->data;
1814 int buf_size = avpkt->size;
1815 H264Context *h = avctx->priv_data;
1816 AVFrame *pict = data;
1817 int buf_index = 0;
1818 H264Picture *out;
1819 int i, out_idx;
1820 int ret;
1821
1822 h->flags = avctx->flags;
1823 /* reset data partitioning here, to ensure GetBitContexts from previous
1824 * packets do not get used. */
1825 h->data_partitioning = 0;
1826
1827 /* end of stream, output what is still in the buffers */
1828 if (buf_size == 0) {
1829 out:
1830
1831 h->cur_pic_ptr = NULL;
1832 h->first_field = 0;
1833
1834 // FIXME factorize this with the output code below
1835 out = h->delayed_pic[0];
1836 out_idx = 0;
1837 for (i = 1;
1838 h->delayed_pic[i] &&
1839 !h->delayed_pic[i]->f.key_frame &&
1840 !h->delayed_pic[i]->mmco_reset;
1841 i++)
1842 if (h->delayed_pic[i]->poc < out->poc) {
1843 out = h->delayed_pic[i];
1844 out_idx = i;
1845 }
1846
1847 for (i = out_idx; h->delayed_pic[i]; i++)
1848 h->delayed_pic[i] = h->delayed_pic[i + 1];
1849
1850 if (out) {
1851 out->reference &= ~DELAYED_PIC_REF;
1852 ret = output_frame(h, pict, out);
1853 if (ret < 0)
1854 return ret;
1855 *got_frame = 1;
1856 }
1857
1858 return buf_index;
1859 }
1860 if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1861 int side_size;
1862 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1863 if (is_extra(side, side_size))
1864 ff_h264_decode_extradata(h, side, side_size);
1865 }
1866 if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
1867 if (is_extra(buf, buf_size))
1868 return ff_h264_decode_extradata(h, buf, buf_size);
1869 }
1870
1871 buf_index = decode_nal_units(h, buf, buf_size, 0);
1872 if (buf_index < 0)
1873 return AVERROR_INVALIDDATA;
1874
1875 if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
1876 av_assert0(buf_index <= buf_size);
1877 goto out;
1878 }
1879
1880 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
1881 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1882 buf_size >= 4 && !memcmp("Q264", buf, 4))
1883 return buf_size;
1884 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1885 return AVERROR_INVALIDDATA;
1886 }
1887
1888 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) ||
1889 (h->mb_y >= h->mb_height && h->mb_height)) {
1890 if (avctx->flags2 & CODEC_FLAG2_CHUNKS)
1891 decode_postinit(h, 1);
1892
1893 ff_h264_field_end(h, 0);
1894
1895 /* Wait for second field. */
1896 *got_frame = 0;
1897 if (h->next_output_pic && (
1898 h->next_output_pic->recovered)) {
1899 if (!h->next_output_pic->recovered)
1900 h->next_output_pic->f.flags |= AV_FRAME_FLAG_CORRUPT;
1901
1902 ret = output_frame(h, pict, h->next_output_pic);
1903 if (ret < 0)
1904 return ret;
1905 *got_frame = 1;
1906 if (CONFIG_MPEGVIDEO) {
1907 ff_print_debug_info2(h->avctx, pict, h->er.mbskip_table,
1908 h->next_output_pic->mb_type,
1909 h->next_output_pic->qscale_table,
1910 h->next_output_pic->motion_val,
1911 &h->low_delay,
1912 h->mb_width, h->mb_height, h->mb_stride, 1);
1913 }
1914 }
1915 }
1916
1917 assert(pict->buf[0] || !*got_frame);
1918
1919 return get_consumed_bytes(buf_index, buf_size);
1920}
1921
1922av_cold void ff_h264_free_context(H264Context *h)
1923{
1924 int i;
1925
1926 ff_h264_free_tables(h, 1); // FIXME cleanup init stuff perhaps
1927
1928 for (i = 0; i < MAX_SPS_COUNT; i++)
1929 av_freep(h->sps_buffers + i);
1930
1931 for (i = 0; i < MAX_PPS_COUNT; i++)
1932 av_freep(h->pps_buffers + i);
1933}
1934
1935static av_cold int h264_decode_end(AVCodecContext *avctx)
1936{
1937 H264Context *h = avctx->priv_data;
1938
1939 ff_h264_remove_all_refs(h);
1940 ff_h264_free_context(h);
1941
1942 ff_h264_unref_picture(h, &h->cur_pic);
1943
1944 return 0;
1945}
1946
1947static const AVProfile profiles[] = {
1948 { FF_PROFILE_H264_BASELINE, "Baseline" },
1949 { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline" },
1950 { FF_PROFILE_H264_MAIN, "Main" },
1951 { FF_PROFILE_H264_EXTENDED, "Extended" },
1952 { FF_PROFILE_H264_HIGH, "High" },
1953 { FF_PROFILE_H264_HIGH_10, "High 10" },
1954 { FF_PROFILE_H264_HIGH_10_INTRA, "High 10 Intra" },
1955 { FF_PROFILE_H264_HIGH_422, "High 4:2:2" },
1956 { FF_PROFILE_H264_HIGH_422_INTRA, "High 4:2:2 Intra" },
1957 { FF_PROFILE_H264_HIGH_444, "High 4:4:4" },
1958 { FF_PROFILE_H264_HIGH_444_PREDICTIVE, "High 4:4:4 Predictive" },
1959 { FF_PROFILE_H264_HIGH_444_INTRA, "High 4:4:4 Intra" },
1960 { FF_PROFILE_H264_CAVLC_444, "CAVLC 4:4:4" },
1961 { FF_PROFILE_UNKNOWN },
1962};
1963
1964static const AVOption h264_options[] = {
1965 {"is_avc", "is avc", offsetof(H264Context, is_avc), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0},
1966 {"nal_length_size", "nal_length_size", offsetof(H264Context, nal_length_size), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0},
1967 {NULL}
1968};
1969
1970static const AVClass h264_class = {
1971 .class_name = "H264 Decoder",
1972 .item_name = av_default_item_name,
1973 .option = h264_options,
1974 .version = LIBAVUTIL_VERSION_INT,
1975};
1976
1977AVCodec ff_h264_decoder = {
1978 .name = "h264",
1979 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1980 .type = AVMEDIA_TYPE_VIDEO,
1981 .id = AV_CODEC_ID_H264,
1982 .priv_data_size = sizeof(H264Context),
1983 .init = ff_h264_decode_init,
1984 .close = h264_decode_end,
1985 .decode = h264_decode_frame,
1986 .capabilities = /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 |
1987 CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS |
1988 CODEC_CAP_FRAME_THREADS,
1989 .flush = flush_dpb,
1990 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1991 .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
1992 .profiles = NULL_IF_CONFIG_SMALL(profiles),
1993 .priv_class = &h264_class,
1994};
1995
1996#if CONFIG_H264_VDPAU_DECODER
1997static const AVClass h264_vdpau_class = {
1998 .class_name = "H264 VDPAU Decoder",
1999 .item_name = av_default_item_name,
2000 .option = h264_options,
2001 .version = LIBAVUTIL_VERSION_INT,
2002};
2003
2004AVCodec ff_h264_vdpau_decoder = {
2005 .name = "h264_vdpau",
2006 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
2007 .type = AVMEDIA_TYPE_VIDEO,
2008 .id = AV_CODEC_ID_H264,
2009 .priv_data_size = sizeof(H264Context),
2010 .init = ff_h264_decode_init,
2011 .close = h264_decode_end,
2012 .decode = h264_decode_frame,
2013 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
2014 .flush = flush_dpb,
2015 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
2016 AV_PIX_FMT_NONE},
2017 .profiles = NULL_IF_CONFIG_SMALL(profiles),
2018 .priv_class = &h264_vdpau_class,
2019};
2020#endif
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