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Imported Debian version 2.5.2~trusty
[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]);
092a9121 394 memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
2ba45a60
DM		 395 av_freep(&h->DPB);
396 } else if (h->DPB) {
397 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
398 h->DPB[i].needs_realloc = 1;
399 }
400
401 h->cur_pic_ptr = NULL;
402
403 for (i = 0; i < H264_MAX_THREADS; i++) {
404 hx = h->thread_context[i];
405 if (!hx)
406 continue;
407 av_freep(&hx->top_borders[1]);
408 av_freep(&hx->top_borders[0]);
409 av_freep(&hx->bipred_scratchpad);
410 av_freep(&hx->edge_emu_buffer);
411 av_freep(&hx->dc_val_base);
412 av_freep(&hx->er.mb_index2xy);
413 av_freep(&hx->er.error_status_table);
414 av_freep(&hx->er.er_temp_buffer);
415 av_freep(&hx->er.mbintra_table);
416 av_freep(&hx->er.mbskip_table);
417
418 if (free_rbsp) {
419 av_freep(&hx->rbsp_buffer[1]);
420 av_freep(&hx->rbsp_buffer[0]);
421 hx->rbsp_buffer_size[0] = 0;
422 hx->rbsp_buffer_size[1] = 0;
423 }
424 if (i)
425 av_freep(&h->thread_context[i]);
426 }
427}
428
429int ff_h264_alloc_tables(H264Context *h)
430{
431 const int big_mb_num = h->mb_stride * (h->mb_height + 1);
432 const int row_mb_num = 2*h->mb_stride*FFMAX(h->avctx->thread_count, 1);
433 int x, y, i;
434
435 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
436 row_mb_num, 8 * sizeof(uint8_t), fail)
437 FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
438 big_mb_num * 48 * sizeof(uint8_t), fail)
439 FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
440 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
441 FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
442 big_mb_num * sizeof(uint16_t), fail)
443 FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
444 big_mb_num * sizeof(uint8_t), fail)
445 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[0],
446 row_mb_num, 16 * sizeof(uint8_t), fail);
447 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->mvd_table[1],
448 row_mb_num, 16 * sizeof(uint8_t), fail);
449 FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
450 4 * big_mb_num * sizeof(uint8_t), fail);
451 FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
452 big_mb_num * sizeof(uint8_t), fail)
453
454 memset(h->slice_table_base, -1,
455 (big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
456 h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
457
458 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
459 big_mb_num * sizeof(uint32_t), fail);
460 FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
461 big_mb_num * sizeof(uint32_t), fail);
462 for (y = 0; y < h->mb_height; y++)
463 for (x = 0; x < h->mb_width; x++) {
464 const int mb_xy = x + y * h->mb_stride;
465 const int b_xy = 4 * x + 4 * y * h->b_stride;
466
467 h->mb2b_xy[mb_xy] = b_xy;
468 h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
469 }
470
471 if (!h->dequant4_coeff[0])
472 h264_init_dequant_tables(h);
473
474 if (!h->DPB) {
475 h->DPB = av_mallocz_array(H264_MAX_PICTURE_COUNT, sizeof(*h->DPB));
476 if (!h->DPB)
477 goto fail;
478 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
479 av_frame_unref(&h->DPB[i].f);
480 av_frame_unref(&h->cur_pic.f);
481 }
482
483 return 0;
484
485fail:
486 ff_h264_free_tables(h, 1);
487 return AVERROR(ENOMEM);
488}
489
490/**
491 * Init context
492 * Allocate buffers which are not shared amongst multiple threads.
493 */
494int ff_h264_context_init(H264Context *h)
495{
496 ERContext *er = &h->er;
497 int mb_array_size = h->mb_height * h->mb_stride;
498 int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
499 int c_size = h->mb_stride * (h->mb_height + 1);
500 int yc_size = y_size + 2 * c_size;
501 int x, y, i;
502
503 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->top_borders[0],
504 h->mb_width, 16 * 3 * sizeof(uint8_t) * 2, fail)
505 FF_ALLOCZ_ARRAY_OR_GOTO(h->avctx, h->top_borders[1],
506 h->mb_width, 16 * 3 * sizeof(uint8_t) * 2, fail)
507
508 h->ref_cache[0][scan8[5] + 1] =
509 h->ref_cache[0][scan8[7] + 1] =
510 h->ref_cache[0][scan8[13] + 1] =
511 h->ref_cache[1][scan8[5] + 1] =
512 h->ref_cache[1][scan8[7] + 1] =
513 h->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
514
515 if (CONFIG_ERROR_RESILIENCE) {
516 /* init ER */
517 er->avctx = h->avctx;
518 er->mecc = &h->mecc;
519 er->decode_mb = h264_er_decode_mb;
520 er->opaque = h;
521 er->quarter_sample = 1;
522
523 er->mb_num = h->mb_num;
524 er->mb_width = h->mb_width;
525 er->mb_height = h->mb_height;
526 er->mb_stride = h->mb_stride;
527 er->b8_stride = h->mb_width * 2 + 1;
528
529 // error resilience code looks cleaner with this
530 FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
531 (h->mb_num + 1) * sizeof(int), fail);
532
533 for (y = 0; y < h->mb_height; y++)
534 for (x = 0; x < h->mb_width; x++)
535 er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
536
537 er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
538 h->mb_stride + h->mb_width;
539
540 FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
541 mb_array_size * sizeof(uint8_t), fail);
542
543 FF_ALLOC_OR_GOTO(h->avctx, er->mbintra_table, mb_array_size, fail);
544 memset(er->mbintra_table, 1, mb_array_size);
545
546 FF_ALLOCZ_OR_GOTO(h->avctx, er->mbskip_table, mb_array_size + 2, fail);
547
548 FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
549 h->mb_height * h->mb_stride, fail);
550
551 FF_ALLOCZ_OR_GOTO(h->avctx, h->dc_val_base,
552 yc_size * sizeof(int16_t), fail);
553 er->dc_val[0] = h->dc_val_base + h->mb_width * 2 + 2;
554 er->dc_val[1] = h->dc_val_base + y_size + h->mb_stride + 1;
555 er->dc_val[2] = er->dc_val[1] + c_size;
556 for (i = 0; i < yc_size; i++)
557 h->dc_val_base[i] = 1024;
558 }
559
560 return 0;
561
562fail:
563 return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
564}
565
566static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
567 int parse_extradata);
568
569int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size)
570{
571 AVCodecContext *avctx = h->avctx;
572 int ret;
573
574 if (!buf || size <= 0)
575 return -1;
576
577 if (buf[0] == 1) {
578 int i, cnt, nalsize;
579 const unsigned char *p = buf;
580
581 h->is_avc = 1;
582
583 if (size < 7) {
584 av_log(avctx, AV_LOG_ERROR,
585 "avcC %d too short\n", size);
586 return AVERROR_INVALIDDATA;
587 }
588 /* sps and pps in the avcC always have length coded with 2 bytes,
589 * so put a fake nal_length_size = 2 while parsing them */
590 h->nal_length_size = 2;
591 // Decode sps from avcC
592 cnt = *(p + 5) & 0x1f; // Number of sps
593 p += 6;
594 for (i = 0; i < cnt; i++) {
595 nalsize = AV_RB16(p) + 2;
596 if(nalsize > size - (p-buf))
597 return AVERROR_INVALIDDATA;
598 ret = decode_nal_units(h, p, nalsize, 1);
599 if (ret < 0) {
600 av_log(avctx, AV_LOG_ERROR,
601 "Decoding sps %d from avcC failed\n", i);
602 return ret;
603 }
604 p += nalsize;
605 }
606 // Decode pps from avcC
607 cnt = *(p++); // Number of pps
608 for (i = 0; i < cnt; i++) {
609 nalsize = AV_RB16(p) + 2;
610 if(nalsize > size - (p-buf))
611 return AVERROR_INVALIDDATA;
612 ret = decode_nal_units(h, p, nalsize, 1);
613 if (ret < 0) {
614 av_log(avctx, AV_LOG_ERROR,
615 "Decoding pps %d from avcC failed\n", i);
616 return ret;
617 }
618 p += nalsize;
619 }
620 // Store right nal length size that will be used to parse all other nals
621 h->nal_length_size = (buf[4] & 0x03) + 1;
622 } else {
623 h->is_avc = 0;
624 ret = decode_nal_units(h, buf, size, 1);
625 if (ret < 0)
626 return ret;
627 }
628 return size;
629}
630
631av_cold int ff_h264_decode_init(AVCodecContext *avctx)
632{
633 H264Context *h = avctx->priv_data;
634 int i;
635 int ret;
636
637 h->avctx = avctx;
638
639 h->bit_depth_luma = 8;
640 h->chroma_format_idc = 1;
641
642 h->avctx->bits_per_raw_sample = 8;
643 h->cur_chroma_format_idc = 1;
644
645 ff_h264dsp_init(&h->h264dsp, 8, 1);
646 av_assert0(h->sps.bit_depth_chroma == 0);
647 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
648 ff_h264qpel_init(&h->h264qpel, 8);
649 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, 8, 1);
650
651 h->dequant_coeff_pps = -1;
652 h->current_sps_id = -1;
653
654 /* needed so that IDCT permutation is known early */
655 if (CONFIG_ERROR_RESILIENCE)
656 ff_me_cmp_init(&h->mecc, h->avctx);
657 ff_videodsp_init(&h->vdsp, 8);
658
659 memset(h->pps.scaling_matrix4, 16, 6 * 16 * sizeof(uint8_t));
660 memset(h->pps.scaling_matrix8, 16, 2 * 64 * sizeof(uint8_t));
661
662 h->picture_structure = PICT_FRAME;
663 h->slice_context_count = 1;
664 h->workaround_bugs = avctx->workaround_bugs;
665 h->flags = avctx->flags;
666
667 /* set defaults */
668 // s->decode_mb = ff_h263_decode_mb;
669 if (!avctx->has_b_frames)
670 h->low_delay = 1;
671
672 avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
673
674 ff_h264_decode_init_vlc();
675
676 ff_init_cabac_states();
677
678 h->pixel_shift = 0;
679 h->sps.bit_depth_luma = avctx->bits_per_raw_sample = 8;
680
681 h->thread_context[0] = h;
682 h->outputed_poc = h->next_outputed_poc = INT_MIN;
683 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
684 h->last_pocs[i] = INT_MIN;
685 h->prev_poc_msb = 1 << 16;
686 h->prev_frame_num = -1;
687 h->x264_build = -1;
688 h->sei_fpa.frame_packing_arrangement_cancel_flag = -1;
689 ff_h264_reset_sei(h);
690 if (avctx->codec_id == AV_CODEC_ID_H264) {
691 if (avctx->ticks_per_frame == 1) {
692 if(h->avctx->time_base.den < INT_MAX/2) {
693 h->avctx->time_base.den *= 2;
694 } else
695 h->avctx->time_base.num /= 2;
696 }
697 avctx->ticks_per_frame = 2;
698 }
699
700 if (avctx->extradata_size > 0 && avctx->extradata) {
701 ret = ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size);
702 if (ret < 0) {
703 ff_h264_free_context(h);
704 return ret;
705 }
706 }
707
708 if (h->sps.bitstream_restriction_flag &&
709 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
710 h->avctx->has_b_frames = h->sps.num_reorder_frames;
711 h->low_delay = 0;
712 }
713
714 avctx->internal->allocate_progress = 1;
715
716 ff_h264_flush_change(h);
717
718 return 0;
719}
720
721static int decode_init_thread_copy(AVCodecContext *avctx)
722{
723 H264Context *h = avctx->priv_data;
724
725 if (!avctx->internal->is_copy)
726 return 0;
727 memset(h->sps_buffers, 0, sizeof(h->sps_buffers));
728 memset(h->pps_buffers, 0, sizeof(h->pps_buffers));
729
730 h->rbsp_buffer[0] = NULL;
731 h->rbsp_buffer[1] = NULL;
732 h->rbsp_buffer_size[0] = 0;
733 h->rbsp_buffer_size[1] = 0;
734 h->context_initialized = 0;
735
736 return 0;
737}
738
739/**
740 * Run setup operations that must be run after slice header decoding.
741 * This includes finding the next displayed frame.
742 *
743 * @param h h264 master context
744 * @param setup_finished enough NALs have been read that we can call
745 * ff_thread_finish_setup()
746 */
747static void decode_postinit(H264Context *h, int setup_finished)
748{
749 H264Picture *out = h->cur_pic_ptr;
750 H264Picture *cur = h->cur_pic_ptr;
751 int i, pics, out_of_order, out_idx;
752
753 h->cur_pic_ptr->f.pict_type = h->pict_type;
754
755 if (h->next_output_pic)
756 return;
757
758 if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
759 /* FIXME: if we have two PAFF fields in one packet, we can't start
760 * the next thread here. If we have one field per packet, we can.
761 * The check in decode_nal_units() is not good enough to find this
762 * yet, so we assume the worst for now. */
763 // if (setup_finished)
764 // ff_thread_finish_setup(h->avctx);
765 return;
766 }
767
768 cur->f.interlaced_frame = 0;
769 cur->f.repeat_pict = 0;
770
771 /* Signal interlacing information externally. */
772 /* Prioritize picture timing SEI information over used
773 * decoding process if it exists. */
774
775 if (h->sps.pic_struct_present_flag) {
776 switch (h->sei_pic_struct) {
777 case SEI_PIC_STRUCT_FRAME:
778 break;
779 case SEI_PIC_STRUCT_TOP_FIELD:
780 case SEI_PIC_STRUCT_BOTTOM_FIELD:
781 cur->f.interlaced_frame = 1;
782 break;
783 case SEI_PIC_STRUCT_TOP_BOTTOM:
784 case SEI_PIC_STRUCT_BOTTOM_TOP:
785 if (FIELD_OR_MBAFF_PICTURE(h))
786 cur->f.interlaced_frame = 1;
787 else
788 // try to flag soft telecine progressive
789 cur->f.interlaced_frame = h->prev_interlaced_frame;
790 break;
791 case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
792 case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
793 /* Signal the possibility of telecined film externally
794 * (pic_struct 5,6). From these hints, let the applications
795 * decide if they apply deinterlacing. */
796 cur->f.repeat_pict = 1;
797 break;
798 case SEI_PIC_STRUCT_FRAME_DOUBLING:
799 cur->f.repeat_pict = 2;
800 break;
801 case SEI_PIC_STRUCT_FRAME_TRIPLING:
802 cur->f.repeat_pict = 4;
803 break;
804 }
805
806 if ((h->sei_ct_type & 3) &&
807 h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
808 cur->f.interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
809 } else {
810 /* Derive interlacing flag from used decoding process. */
811 cur->f.interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
812 }
813 h->prev_interlaced_frame = cur->f.interlaced_frame;
814
815 if (cur->field_poc[0] != cur->field_poc[1]) {
816 /* Derive top_field_first from field pocs. */
817 cur->f.top_field_first = cur->field_poc[0] < cur->field_poc[1];
818 } else {
819 if (cur->f.interlaced_frame || h->sps.pic_struct_present_flag) {
820 /* Use picture timing SEI information. Even if it is a
821 * information of a past frame, better than nothing. */
822 if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
823 h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
824 cur->f.top_field_first = 1;
825 else
826 cur->f.top_field_first = 0;
827 } else {
828 /* Most likely progressive */
829 cur->f.top_field_first = 0;
830 }
831 }
832
833 if (h->sei_frame_packing_present &&
834 h->frame_packing_arrangement_type >= 0 &&
835 h->frame_packing_arrangement_type <= 6 &&
836 h->content_interpretation_type > 0 &&
837 h->content_interpretation_type < 3) {
838 AVStereo3D *stereo = av_stereo3d_create_side_data(&cur->f);
839 if (stereo) {
840 switch (h->frame_packing_arrangement_type) {
841 case 0:
842 stereo->type = AV_STEREO3D_CHECKERBOARD;
843 break;
844 case 1:
845 stereo->type = AV_STEREO3D_COLUMNS;
846 break;
847 case 2:
848 stereo->type = AV_STEREO3D_LINES;
849 break;
850 case 3:
851 if (h->quincunx_subsampling)
852 stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
853 else
854 stereo->type = AV_STEREO3D_SIDEBYSIDE;
855 break;
856 case 4:
857 stereo->type = AV_STEREO3D_TOPBOTTOM;
858 break;
859 case 5:
860 stereo->type = AV_STEREO3D_FRAMESEQUENCE;
861 break;
862 case 6:
863 stereo->type = AV_STEREO3D_2D;
864 break;
865 }
866
867 if (h->content_interpretation_type == 2)
868 stereo->flags = AV_STEREO3D_FLAG_INVERT;
869 }
870 }
871
872 if (h->sei_display_orientation_present &&
873 (h->sei_anticlockwise_rotation || h->sei_hflip || h->sei_vflip)) {
874 double angle = h->sei_anticlockwise_rotation * 360 / (double) (1 << 16);
875 AVFrameSideData *rotation = av_frame_new_side_data(&cur->f,
876 AV_FRAME_DATA_DISPLAYMATRIX,
877 sizeof(int32_t) * 9);
878 if (rotation) {
879 av_display_rotation_set((int32_t *)rotation->data, angle);
880 av_display_matrix_flip((int32_t *)rotation->data,
f6fa7814 881 h->sei_hflip, h->sei_vflip);
2ba45a60
DM		 882 }
883 }
884
885 cur->mmco_reset = h->mmco_reset;
886 h->mmco_reset = 0;
887
888 // FIXME do something with unavailable reference frames
889
890 /* Sort B-frames into display order */
891
892 if (h->sps.bitstream_restriction_flag &&
893 h->avctx->has_b_frames < h->sps.num_reorder_frames) {
894 h->avctx->has_b_frames = h->sps.num_reorder_frames;
895 h->low_delay = 0;
896 }
897
898 if (h->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT &&
899 !h->sps.bitstream_restriction_flag) {
900 h->avctx->has_b_frames = MAX_DELAYED_PIC_COUNT - 1;
901 h->low_delay = 0;
902 }
903
904 for (i = 0; 1; i++) {
905 if(i == MAX_DELAYED_PIC_COUNT || cur->poc < h->last_pocs[i]){
906 if(i)
907 h->last_pocs[i-1] = cur->poc;
908 break;
909 } else if(i) {
910 h->last_pocs[i-1]= h->last_pocs[i];
911 }
912 }
913 out_of_order = MAX_DELAYED_PIC_COUNT - i;
914 if( cur->f.pict_type == AV_PICTURE_TYPE_B
915 || (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))
916 out_of_order = FFMAX(out_of_order, 1);
917 if (out_of_order == MAX_DELAYED_PIC_COUNT) {
918 av_log(h->avctx, AV_LOG_VERBOSE, "Invalid POC %d<%d\n", cur->poc, h->last_pocs[0]);
919 for (i = 1; i < MAX_DELAYED_PIC_COUNT; i++)
920 h->last_pocs[i] = INT_MIN;
921 h->last_pocs[0] = cur->poc;
922 cur->mmco_reset = 1;
923 } else if(h->avctx->has_b_frames < out_of_order && !h->sps.bitstream_restriction_flag){
924 av_log(h->avctx, AV_LOG_VERBOSE, "Increasing reorder buffer to %d\n", out_of_order);
925 h->avctx->has_b_frames = out_of_order;
926 h->low_delay = 0;
927 }
928
929 pics = 0;
930 while (h->delayed_pic[pics])
931 pics++;
932
933 av_assert0(pics <= MAX_DELAYED_PIC_COUNT);
934
935 h->delayed_pic[pics++] = cur;
936 if (cur->reference == 0)
937 cur->reference = DELAYED_PIC_REF;
938
939 out = h->delayed_pic[0];
940 out_idx = 0;
941 for (i = 1; h->delayed_pic[i] &&
942 !h->delayed_pic[i]->f.key_frame &&
943 !h->delayed_pic[i]->mmco_reset;
944 i++)
945 if (h->delayed_pic[i]->poc < out->poc) {
946 out = h->delayed_pic[i];
947 out_idx = i;
948 }
949 if (h->avctx->has_b_frames == 0 &&
950 (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset))
951 h->next_outputed_poc = INT_MIN;
952 out_of_order = out->poc < h->next_outputed_poc;
953
954 if (out_of_order || pics > h->avctx->has_b_frames) {
955 out->reference &= ~DELAYED_PIC_REF;
956 // for frame threading, the owner must be the second field's thread or
957 // else the first thread can release the picture and reuse it unsafely
958 for (i = out_idx; h->delayed_pic[i]; i++)
959 h->delayed_pic[i] = h->delayed_pic[i + 1];
960 }
961 if (!out_of_order && pics > h->avctx->has_b_frames) {
962 h->next_output_pic = out;
963 if (out_idx == 0 && h->delayed_pic[0] && (h->delayed_pic[0]->f.key_frame || h->delayed_pic[0]->mmco_reset)) {
964 h->next_outputed_poc = INT_MIN;
965 } else
966 h->next_outputed_poc = out->poc;
967 } else {
968 av_log(h->avctx, AV_LOG_DEBUG, "no picture %s\n", out_of_order ? "ooo" : "");
969 }
970
971 if (h->next_output_pic) {
972 if (h->next_output_pic->recovered) {
973 // We have reached an recovery point and all frames after it in
974 // display order are "recovered".
975 h->frame_recovered |= FRAME_RECOVERED_SEI;
976 }
977 h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
978 }
979
980 if (setup_finished && !h->avctx->hwaccel)
981 ff_thread_finish_setup(h->avctx);
982}
983
984int ff_pred_weight_table(H264Context *h)
985{
986 int list, i;
987 int luma_def, chroma_def;
988
989 h->use_weight = 0;
990 h->use_weight_chroma = 0;
991 h->luma_log2_weight_denom = get_ue_golomb(&h->gb);
992 if (h->sps.chroma_format_idc)
993 h->chroma_log2_weight_denom = get_ue_golomb(&h->gb);
092a9121
DM		 994
995 if (h->luma_log2_weight_denom > 7U) {
996 av_log(h->avctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", h->luma_log2_weight_denom);
997 h->luma_log2_weight_denom = 0;
998 }
999 if (h->chroma_log2_weight_denom > 7U) {
1000 av_log(h->avctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", h->chroma_log2_weight_denom);
1001 h->chroma_log2_weight_denom = 0;
1002 }
1003
2ba45a60
DM		 1004 luma_def = 1 << h->luma_log2_weight_denom;
1005 chroma_def = 1 << h->chroma_log2_weight_denom;
1006
1007 for (list = 0; list < 2; list++) {
1008 h->luma_weight_flag[list] = 0;
1009 h->chroma_weight_flag[list] = 0;
1010 for (i = 0; i < h->ref_count[list]; i++) {
1011 int luma_weight_flag, chroma_weight_flag;
1012
1013 luma_weight_flag = get_bits1(&h->gb);
1014 if (luma_weight_flag) {
1015 h->luma_weight[i][list][0] = get_se_golomb(&h->gb);
1016 h->luma_weight[i][list][1] = get_se_golomb(&h->gb);
1017 if (h->luma_weight[i][list][0] != luma_def ||
1018 h->luma_weight[i][list][1] != 0) {
1019 h->use_weight = 1;
1020 h->luma_weight_flag[list] = 1;
1021 }
1022 } else {
1023 h->luma_weight[i][list][0] = luma_def;
1024 h->luma_weight[i][list][1] = 0;
1025 }
1026
1027 if (h->sps.chroma_format_idc) {
1028 chroma_weight_flag = get_bits1(&h->gb);
1029 if (chroma_weight_flag) {
1030 int j;
1031 for (j = 0; j < 2; j++) {
1032 h->chroma_weight[i][list][j][0] = get_se_golomb(&h->gb);
1033 h->chroma_weight[i][list][j][1] = get_se_golomb(&h->gb);
1034 if (h->chroma_weight[i][list][j][0] != chroma_def ||
1035 h->chroma_weight[i][list][j][1] != 0) {
1036 h->use_weight_chroma = 1;
1037 h->chroma_weight_flag[list] = 1;
1038 }
1039 }
1040 } else {
1041 int j;
1042 for (j = 0; j < 2; j++) {
1043 h->chroma_weight[i][list][j][0] = chroma_def;
1044 h->chroma_weight[i][list][j][1] = 0;
1045 }
1046 }
1047 }
1048 }
1049 if (h->slice_type_nos != AV_PICTURE_TYPE_B)
1050 break;
1051 }
1052 h->use_weight = h->use_weight || h->use_weight_chroma;
1053 return 0;
1054}
1055
1056/**
1057 * instantaneous decoder refresh.
1058 */
1059static void idr(H264Context *h)
1060{
1061 int i;
1062 ff_h264_remove_all_refs(h);
1063 h->prev_frame_num =
1064 h->prev_frame_num_offset = 0;
1065 h->prev_poc_msb = 1<<16;
1066 h->prev_poc_lsb = 0;
1067 for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
1068 h->last_pocs[i] = INT_MIN;
1069}
1070
1071/* forget old pics after a seek */
1072void ff_h264_flush_change(H264Context *h)
1073{
1074 int i, j;
1075
1076 h->outputed_poc = h->next_outputed_poc = INT_MIN;
1077 h->prev_interlaced_frame = 1;
1078 idr(h);
1079
1080 h->prev_frame_num = -1;
1081 if (h->cur_pic_ptr) {
1082 h->cur_pic_ptr->reference = 0;
1083 for (j=i=0; h->delayed_pic[i]; i++)
1084 if (h->delayed_pic[i] != h->cur_pic_ptr)
1085 h->delayed_pic[j++] = h->delayed_pic[i];
1086 h->delayed_pic[j] = NULL;
1087 }
1088 h->first_field = 0;
1089 memset(h->ref_list[0], 0, sizeof(h->ref_list[0]));
1090 memset(h->ref_list[1], 0, sizeof(h->ref_list[1]));
1091 memset(h->default_ref_list[0], 0, sizeof(h->default_ref_list[0]));
1092 memset(h->default_ref_list[1], 0, sizeof(h->default_ref_list[1]));
1093 ff_h264_reset_sei(h);
1094 h->recovery_frame = -1;
1095 h->frame_recovered = 0;
1096 h->list_count = 0;
1097 h->current_slice = 0;
1098 h->mmco_reset = 1;
1099}
1100
1101/* forget old pics after a seek */
1102static void flush_dpb(AVCodecContext *avctx)
1103{
1104 H264Context *h = avctx->priv_data;
1105 int i;
1106
1107 for (i = 0; i <= MAX_DELAYED_PIC_COUNT; i++) {
1108 if (h->delayed_pic[i])
1109 h->delayed_pic[i]->reference = 0;
1110 h->delayed_pic[i] = NULL;
1111 }
1112
1113 ff_h264_flush_change(h);
1114
1115 if (h->DPB)
1116 for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
1117 ff_h264_unref_picture(h, &h->DPB[i]);
1118 h->cur_pic_ptr = NULL;
1119 ff_h264_unref_picture(h, &h->cur_pic);
1120
1121 h->mb_x = h->mb_y = 0;
1122
1123 h->parse_context.state = -1;
1124 h->parse_context.frame_start_found = 0;
1125 h->parse_context.overread = 0;
1126 h->parse_context.overread_index = 0;
1127 h->parse_context.index = 0;
1128 h->parse_context.last_index = 0;
1129
1130 ff_h264_free_tables(h, 1);
1131 h->context_initialized = 0;
1132}
1133
1134int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
1135{
1136 const int max_frame_num = 1 << h->sps.log2_max_frame_num;
1137 int field_poc[2];
1138
1139 h->frame_num_offset = h->prev_frame_num_offset;
1140 if (h->frame_num < h->prev_frame_num)
1141 h->frame_num_offset += max_frame_num;
1142
1143 if (h->sps.poc_type == 0) {
1144 const int max_poc_lsb = 1 << h->sps.log2_max_poc_lsb;
1145
1146 if (h->poc_lsb < h->prev_poc_lsb &&
1147 h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb / 2)
1148 h->poc_msb = h->prev_poc_msb + max_poc_lsb;
1149 else if (h->poc_lsb > h->prev_poc_lsb &&
1150 h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb / 2)
1151 h->poc_msb = h->prev_poc_msb - max_poc_lsb;
1152 else
1153 h->poc_msb = h->prev_poc_msb;
1154 field_poc[0] =
1155 field_poc[1] = h->poc_msb + h->poc_lsb;
1156 if (h->picture_structure == PICT_FRAME)
1157 field_poc[1] += h->delta_poc_bottom;
1158 } else if (h->sps.poc_type == 1) {
1159 int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
1160 int i;
1161
1162 if (h->sps.poc_cycle_length != 0)
1163 abs_frame_num = h->frame_num_offset + h->frame_num;
1164 else
1165 abs_frame_num = 0;
1166
1167 if (h->nal_ref_idc == 0 && abs_frame_num > 0)
1168 abs_frame_num--;
1169
1170 expected_delta_per_poc_cycle = 0;
1171 for (i = 0; i < h->sps.poc_cycle_length; i++)
1172 // FIXME integrate during sps parse
1173 expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[i];
1174
1175 if (abs_frame_num > 0) {
1176 int poc_cycle_cnt = (abs_frame_num - 1) / h->sps.poc_cycle_length;
1177 int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
1178
1179 expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
1180 for (i = 0; i <= frame_num_in_poc_cycle; i++)
1181 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[i];
1182 } else
1183 expectedpoc = 0;
1184
1185 if (h->nal_ref_idc == 0)
1186 expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
1187
1188 field_poc[0] = expectedpoc + h->delta_poc[0];
1189 field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
1190
1191 if (h->picture_structure == PICT_FRAME)
1192 field_poc[1] += h->delta_poc[1];
1193 } else {
1194 int poc = 2 * (h->frame_num_offset + h->frame_num);
1195
1196 if (!h->nal_ref_idc)
1197 poc--;
1198
1199 field_poc[0] = poc;
1200 field_poc[1] = poc;
1201 }
1202
1203 if (h->picture_structure != PICT_BOTTOM_FIELD)
1204 pic_field_poc[0] = field_poc[0];
1205 if (h->picture_structure != PICT_TOP_FIELD)
1206 pic_field_poc[1] = field_poc[1];
1207 *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
1208
1209 return 0;
1210}
1211
1212/**
1213 * Compute profile from profile_idc and constraint_set?_flags.
1214 *
1215 * @param sps SPS
1216 *
1217 * @return profile as defined by FF_PROFILE_H264_*
1218 */
1219int ff_h264_get_profile(SPS *sps)
1220{
1221 int profile = sps->profile_idc;
1222
1223 switch (sps->profile_idc) {
1224 case FF_PROFILE_H264_BASELINE:
1225 // constraint_set1_flag set to 1
1226 profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
1227 break;
1228 case FF_PROFILE_H264_HIGH_10:
1229 case FF_PROFILE_H264_HIGH_422:
1230 case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
1231 // constraint_set3_flag set to 1
1232 profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
1233 break;
1234 }
1235
1236 return profile;
1237}
1238
1239int ff_h264_set_parameter_from_sps(H264Context *h)
1240{
1241 if (h->flags & CODEC_FLAG_LOW_DELAY ||
1242 (h->sps.bitstream_restriction_flag &&
1243 !h->sps.num_reorder_frames)) {
1244 if (h->avctx->has_b_frames > 1 || h->delayed_pic[0])
1245 av_log(h->avctx, AV_LOG_WARNING, "Delayed frames seen. "
1246 "Reenabling low delay requires a codec flush.\n");
1247 else
1248 h->low_delay = 1;
1249 }
1250
1251 if (h->avctx->has_b_frames < 2)
1252 h->avctx->has_b_frames = !h->low_delay;
1253
1254 if (h->avctx->bits_per_raw_sample != h->sps.bit_depth_luma ||
1255 h->cur_chroma_format_idc != h->sps.chroma_format_idc) {
1256 if (h->avctx->codec &&
1257 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU &&
1258 (h->sps.bit_depth_luma != 8 || h->sps.chroma_format_idc > 1)) {
1259 av_log(h->avctx, AV_LOG_ERROR,
1260 "VDPAU decoding does not support video colorspace.\n");
1261 return AVERROR_INVALIDDATA;
1262 }
1263 if (h->sps.bit_depth_luma >= 8 && h->sps.bit_depth_luma <= 14 &&
1264 h->sps.bit_depth_luma != 11 && h->sps.bit_depth_luma != 13) {
1265 h->avctx->bits_per_raw_sample = h->sps.bit_depth_luma;
1266 h->cur_chroma_format_idc = h->sps.chroma_format_idc;
1267 h->pixel_shift = h->sps.bit_depth_luma > 8;
1268
1269 ff_h264dsp_init(&h->h264dsp, h->sps.bit_depth_luma,
1270 h->sps.chroma_format_idc);
1271 ff_h264chroma_init(&h->h264chroma, h->sps.bit_depth_chroma);
1272 ff_h264qpel_init(&h->h264qpel, h->sps.bit_depth_luma);
1273 ff_h264_pred_init(&h->hpc, h->avctx->codec_id, h->sps.bit_depth_luma,
1274 h->sps.chroma_format_idc);
1275
1276 if (CONFIG_ERROR_RESILIENCE)
1277 ff_me_cmp_init(&h->mecc, h->avctx);
1278 ff_videodsp_init(&h->vdsp, h->sps.bit_depth_luma);
1279 } else {
1280 av_log(h->avctx, AV_LOG_ERROR, "Unsupported bit depth %d\n",
1281 h->sps.bit_depth_luma);
1282 return AVERROR_INVALIDDATA;
1283 }
1284 }
1285 return 0;
1286}
1287
1288int ff_set_ref_count(H264Context *h)
1289{
1290 int ref_count[2], list_count;
1291 int num_ref_idx_active_override_flag;
1292
1293 // set defaults, might be overridden a few lines later
1294 ref_count[0] = h->pps.ref_count[0];
1295 ref_count[1] = h->pps.ref_count[1];
1296
1297 if (h->slice_type_nos != AV_PICTURE_TYPE_I) {
1298 unsigned max[2];
1299 max[0] = max[1] = h->picture_structure == PICT_FRAME ? 15 : 31;
1300
1301 if (h->slice_type_nos == AV_PICTURE_TYPE_B)
1302 h->direct_spatial_mv_pred = get_bits1(&h->gb);
1303 num_ref_idx_active_override_flag = get_bits1(&h->gb);
1304
1305 if (num_ref_idx_active_override_flag) {
1306 ref_count[0] = get_ue_golomb(&h->gb) + 1;
1307 if (h->slice_type_nos == AV_PICTURE_TYPE_B) {
1308 ref_count[1] = get_ue_golomb(&h->gb) + 1;
1309 } else
1310 // full range is spec-ok in this case, even for frames
1311 ref_count[1] = 1;
1312 }
1313
1314 if (ref_count[0]-1 > max[0] || ref_count[1]-1 > max[1]){
1315 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]);
1316 h->ref_count[0] = h->ref_count[1] = 0;
1317 h->list_count = 0;
1318 return AVERROR_INVALIDDATA;
1319 }
1320
1321 if (h->slice_type_nos == AV_PICTURE_TYPE_B)
1322 list_count = 2;
1323 else
1324 list_count = 1;
1325 } else {
1326 list_count = 0;
1327 ref_count[0] = ref_count[1] = 0;
1328 }
1329
1330 if (list_count != h->list_count ||
1331 ref_count[0] != h->ref_count[0] ||
1332 ref_count[1] != h->ref_count[1]) {
1333 h->ref_count[0] = ref_count[0];
1334 h->ref_count[1] = ref_count[1];
1335 h->list_count = list_count;
1336 return 1;
1337 }
1338
1339 return 0;
1340}
1341
1342static const uint8_t start_code[] = { 0x00, 0x00, 0x01 };
1343
1344static int get_bit_length(H264Context *h, const uint8_t *buf,
1345 const uint8_t *ptr, int dst_length,
1346 int i, int next_avc)
1347{
1348 if ((h->workaround_bugs & FF_BUG_AUTODETECT) && i + 3 < next_avc &&
1349 buf[i] == 0x00 && buf[i + 1] == 0x00 &&
1350 buf[i + 2] == 0x01 && buf[i + 3] == 0xE0)
1351 h->workaround_bugs |= FF_BUG_TRUNCATED;
1352
1353 if (!(h->workaround_bugs & FF_BUG_TRUNCATED))
1354 while (dst_length > 0 && ptr[dst_length - 1] == 0)
1355 dst_length--;
1356
1357 if (!dst_length)
1358 return 0;
1359
1360 return 8 * dst_length - decode_rbsp_trailing(h, ptr + dst_length - 1);
1361}
1362
1363static int get_last_needed_nal(H264Context *h, const uint8_t *buf, int buf_size)
1364{
1365 int next_avc = h->is_avc ? 0 : buf_size;
1366 int nal_index = 0;
1367 int buf_index = 0;
1368 int nals_needed = 0;
1369 int first_slice = 0;
1370
1371 while(1) {
1372 int nalsize = 0;
1373 int dst_length, bit_length, consumed;
1374 const uint8_t *ptr;
1375
1376 if (buf_index >= next_avc) {
1377 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1378 if (nalsize < 0)
1379 break;
1380 next_avc = buf_index + nalsize;
1381 } else {
1382 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1383 if (buf_index >= buf_size)
1384 break;
1385 if (buf_index >= next_avc)
1386 continue;
1387 }
1388
1389 ptr = ff_h264_decode_nal(h, buf + buf_index, &dst_length, &consumed,
1390 next_avc - buf_index);
1391
1392 if (!ptr || dst_length < 0)
1393 return AVERROR_INVALIDDATA;
1394
1395 buf_index += consumed;
1396
1397 bit_length = get_bit_length(h, buf, ptr, dst_length,
1398 buf_index, next_avc);
1399 nal_index++;
1400
1401 /* packets can sometimes contain multiple PPS/SPS,
1402 * e.g. two PAFF field pictures in one packet, or a demuxer
1403 * which splits NALs strangely if so, when frame threading we
1404 * can't start the next thread until we've read all of them */
1405 switch (h->nal_unit_type) {
1406 case NAL_SPS:
1407 case NAL_PPS:
1408 nals_needed = nal_index;
1409 break;
1410 case NAL_DPA:
1411 case NAL_IDR_SLICE:
1412 case NAL_SLICE:
1413 init_get_bits(&h->gb, ptr, bit_length);
1414 if (!get_ue_golomb(&h->gb) ||
1415 !first_slice ||
1416 first_slice != h->nal_unit_type)
1417 nals_needed = nal_index;
1418 if (!first_slice)
1419 first_slice = h->nal_unit_type;
1420 }
1421 }
1422
1423 return nals_needed;
1424}
1425
1426static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
1427 int parse_extradata)
1428{
1429 AVCodecContext *const avctx = h->avctx;
1430 H264Context *hx; ///< thread context
1431 int buf_index;
1432 unsigned context_count;
1433 int next_avc;
1434 int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
1435 int nal_index;
1436 int idr_cleared=0;
1437 int ret = 0;
1438
1439 h->nal_unit_type= 0;
1440
1441 if(!h->slice_context_count)
1442 h->slice_context_count= 1;
1443 h->max_contexts = h->slice_context_count;
1444 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS)) {
1445 h->current_slice = 0;
1446 if (!h->first_field)
1447 h->cur_pic_ptr = NULL;
1448 ff_h264_reset_sei(h);
1449 }
1450
1451 if (h->nal_length_size == 4) {
1452 if (buf_size > 8 && AV_RB32(buf) == 1 && AV_RB32(buf+5) > (unsigned)buf_size) {
1453 h->is_avc = 0;
1454 }else if(buf_size > 3 && AV_RB32(buf) > 1 && AV_RB32(buf) <= (unsigned)buf_size)
1455 h->is_avc = 1;
1456 }
1457
1458 if (avctx->active_thread_type & FF_THREAD_FRAME)
1459 nals_needed = get_last_needed_nal(h, buf, buf_size);
1460
1461 {
1462 buf_index = 0;
1463 context_count = 0;
1464 next_avc = h->is_avc ? 0 : buf_size;
1465 nal_index = 0;
1466 for (;;) {
1467 int consumed;
1468 int dst_length;
1469 int bit_length;
1470 const uint8_t *ptr;
1471 int nalsize = 0;
1472 int err;
1473
1474 if (buf_index >= next_avc) {
1475 nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
1476 if (nalsize < 0)
1477 break;
1478 next_avc = buf_index + nalsize;
1479 } else {
1480 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
1481 if (buf_index >= buf_size)
1482 break;
1483 if (buf_index >= next_avc)
1484 continue;
1485 }
1486
1487 hx = h->thread_context[context_count];
1488
1489 ptr = ff_h264_decode_nal(hx, buf + buf_index, &dst_length,
1490 &consumed, next_avc - buf_index);
1491 if (!ptr || dst_length < 0) {
1492 ret = -1;
1493 goto end;
1494 }
1495
1496 bit_length = get_bit_length(h, buf, ptr, dst_length,
1497 buf_index + consumed, next_avc);
1498
1499 if (h->avctx->debug & FF_DEBUG_STARTCODE)
1500 av_log(h->avctx, AV_LOG_DEBUG,
1501 "NAL %d/%d at %d/%d length %d\n",
1502 hx->nal_unit_type, hx->nal_ref_idc, buf_index, buf_size, dst_length);
1503
1504 if (h->is_avc && (nalsize != consumed) && nalsize)
1505 av_log(h->avctx, AV_LOG_DEBUG,
1506 "AVC: Consumed only %d bytes instead of %d\n",
1507 consumed, nalsize);
1508
1509 buf_index += consumed;
1510 nal_index++;
1511
1512 if (avctx->skip_frame >= AVDISCARD_NONREF &&
1513 h->nal_ref_idc == 0 &&
1514 h->nal_unit_type != NAL_SEI)
1515 continue;
1516
1517again:
1518 if ( !(avctx->active_thread_type & FF_THREAD_FRAME)
1519 || nals_needed >= nal_index)
1520 h->au_pps_id = -1;
1521 /* Ignore per frame NAL unit type during extradata
1522 * parsing. Decoding slices is not possible in codec init
1523 * with frame-mt */
1524 if (parse_extradata) {
1525 switch (hx->nal_unit_type) {
1526 case NAL_IDR_SLICE:
1527 case NAL_SLICE:
1528 case NAL_DPA:
1529 case NAL_DPB:
1530 case NAL_DPC:
1531 av_log(h->avctx, AV_LOG_WARNING,
1532 "Ignoring NAL %d in global header/extradata\n",
1533 hx->nal_unit_type);
1534 // fall through to next case
1535 case NAL_AUXILIARY_SLICE:
1536 hx->nal_unit_type = NAL_FF_IGNORE;
1537 }
1538 }
1539
1540 err = 0;
1541
1542 switch (hx->nal_unit_type) {
1543 case NAL_IDR_SLICE:
1544 if ((ptr[0] & 0xFC) == 0x98) {
1545 av_log(h->avctx, AV_LOG_ERROR, "Invalid inter IDR frame\n");
1546 h->next_outputed_poc = INT_MIN;
1547 ret = -1;
1548 goto end;
1549 }
1550 if (h->nal_unit_type != NAL_IDR_SLICE) {
1551 av_log(h->avctx, AV_LOG_ERROR,
1552 "Invalid mix of idr and non-idr slices\n");
1553 ret = -1;
1554 goto end;
1555 }
1556 if(!idr_cleared)
1557 idr(h); // FIXME ensure we don't lose some frames if there is reordering
1558 idr_cleared = 1;
1559 h->has_recovery_point = 1;
1560 case NAL_SLICE:
1561 init_get_bits(&hx->gb, ptr, bit_length);
1562 hx->intra_gb_ptr =
1563 hx->inter_gb_ptr = &hx->gb;
1564 hx->data_partitioning = 0;
1565
1566 if ((err = ff_h264_decode_slice_header(hx, h)))
1567 break;
1568
1569 if (h->sei_recovery_frame_cnt >= 0) {
1570 if (h->frame_num != h->sei_recovery_frame_cnt || hx->slice_type_nos != AV_PICTURE_TYPE_I)
1571 h->valid_recovery_point = 1;
1572
1573 if ( h->recovery_frame < 0
1574 || ((h->recovery_frame - h->frame_num) & ((1 << h->sps.log2_max_frame_num)-1)) > h->sei_recovery_frame_cnt) {
1575 h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) &
1576 ((1 << h->sps.log2_max_frame_num) - 1);
1577
1578 if (!h->valid_recovery_point)
1579 h->recovery_frame = h->frame_num;
1580 }
1581 }
1582
1583 h->cur_pic_ptr->f.key_frame |=
1584 (hx->nal_unit_type == NAL_IDR_SLICE);
1585
1586 if (hx->nal_unit_type == NAL_IDR_SLICE ||
1587 h->recovery_frame == h->frame_num) {
1588 h->recovery_frame = -1;
1589 h->cur_pic_ptr->recovered = 1;
1590 }
1591 // If we have an IDR, all frames after it in decoded order are
1592 // "recovered".
1593 if (hx->nal_unit_type == NAL_IDR_SLICE)
1594 h->frame_recovered |= FRAME_RECOVERED_IDR;
1595 h->frame_recovered |= 3*!!(avctx->flags2 & CODEC_FLAG2_SHOW_ALL);
1596 h->frame_recovered |= 3*!!(avctx->flags & CODEC_FLAG_OUTPUT_CORRUPT);
1597#if 1
1598 h->cur_pic_ptr->recovered |= h->frame_recovered;
1599#else
1600 h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
1601#endif
1602
1603 if (h->current_slice == 1) {
1604 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS))
1605 decode_postinit(h, nal_index >= nals_needed);
1606
1607 if (h->avctx->hwaccel &&
1608 (ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0)) < 0)
1609 return ret;
1610 if (CONFIG_H264_VDPAU_DECODER &&
1611 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
1612 ff_vdpau_h264_picture_start(h);
1613 }
1614
1615 if (hx->redundant_pic_count == 0) {
1616 if (avctx->hwaccel) {
1617 ret = avctx->hwaccel->decode_slice(avctx,
1618 &buf[buf_index - consumed],
1619 consumed);
1620 if (ret < 0)
1621 return ret;
1622 } else if (CONFIG_H264_VDPAU_DECODER &&
1623 h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU) {
1624 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0],
1625 start_code,
1626 sizeof(start_code));
1627 ff_vdpau_add_data_chunk(h->cur_pic_ptr->f.data[0],
1628 &buf[buf_index - consumed],
1629 consumed);
1630 } else
1631 context_count++;
1632 }
1633 break;
1634 case NAL_DPA:
1635 if (h->avctx->flags & CODEC_FLAG2_CHUNKS) {
1636 av_log(h->avctx, AV_LOG_ERROR,
1637 "Decoding in chunks is not supported for "
1638 "partitioned slices.\n");
1639 return AVERROR(ENOSYS);
1640 }
1641
1642 init_get_bits(&hx->gb, ptr, bit_length);
1643 hx->intra_gb_ptr =
1644 hx->inter_gb_ptr = NULL;
1645
1646 if ((err = ff_h264_decode_slice_header(hx, h))) {
1647 /* make sure data_partitioning is cleared if it was set
1648 * before, so we don't try decoding a slice without a valid
1649 * slice header later */
1650 h->data_partitioning = 0;
1651 break;
1652 }
1653
1654 hx->data_partitioning = 1;
1655 break;
1656 case NAL_DPB:
1657 init_get_bits(&hx->intra_gb, ptr, bit_length);
1658 hx->intra_gb_ptr = &hx->intra_gb;
1659 break;
1660 case NAL_DPC:
1661 init_get_bits(&hx->inter_gb, ptr, bit_length);
1662 hx->inter_gb_ptr = &hx->inter_gb;
1663
1664 av_log(h->avctx, AV_LOG_ERROR, "Partitioned H.264 support is incomplete\n");
1665 break;
1666
1667 if (hx->redundant_pic_count == 0 &&
1668 hx->intra_gb_ptr &&
1669 hx->data_partitioning &&
1670 h->cur_pic_ptr && h->context_initialized &&
1671 (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc) &&
1672 (avctx->skip_frame < AVDISCARD_BIDIR ||
1673 hx->slice_type_nos != AV_PICTURE_TYPE_B) &&
1674 (avctx->skip_frame < AVDISCARD_NONINTRA ||
1675 hx->slice_type_nos == AV_PICTURE_TYPE_I) &&
1676 avctx->skip_frame < AVDISCARD_ALL)
1677 context_count++;
1678 break;
1679 case NAL_SEI:
1680 init_get_bits(&h->gb, ptr, bit_length);
1681 ret = ff_h264_decode_sei(h);
1682 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1683 goto end;
1684 break;
1685 case NAL_SPS:
1686 init_get_bits(&h->gb, ptr, bit_length);
1687 if (ff_h264_decode_seq_parameter_set(h) < 0 && (h->is_avc ? nalsize : 1)) {
1688 av_log(h->avctx, AV_LOG_DEBUG,
1689 "SPS decoding failure, trying again with the complete NAL\n");
1690 if (h->is_avc)
1691 av_assert0(next_avc - buf_index + consumed == nalsize);
1692 if ((next_avc - buf_index + consumed - 1) >= INT_MAX/8)
1693 break;
1694 init_get_bits(&h->gb, &buf[buf_index + 1 - consumed],
1695 8*(next_avc - buf_index + consumed - 1));
1696 ff_h264_decode_seq_parameter_set(h);
1697 }
1698
1699 break;
1700 case NAL_PPS:
1701 init_get_bits(&h->gb, ptr, bit_length);
1702 ret = ff_h264_decode_picture_parameter_set(h, bit_length);
1703 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1704 goto end;
1705 break;
1706 case NAL_AUD:
1707 case NAL_END_SEQUENCE:
1708 case NAL_END_STREAM:
1709 case NAL_FILLER_DATA:
1710 case NAL_SPS_EXT:
1711 case NAL_AUXILIARY_SLICE:
1712 break;
1713 case NAL_FF_IGNORE:
1714 break;
1715 default:
1716 av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
1717 hx->nal_unit_type, bit_length);
1718 }
1719
1720 if (context_count == h->max_contexts) {
1721 ret = ff_h264_execute_decode_slices(h, context_count);
1722 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1723 goto end;
1724 context_count = 0;
1725 }
1726
1727 if (err < 0 || err == SLICE_SKIPED) {
1728 if (err < 0)
1729 av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
1730 h->ref_count[0] = h->ref_count[1] = h->list_count = 0;
1731 } else if (err == SLICE_SINGLETHREAD) {
1732 /* Slice could not be decoded in parallel mode, copy down
1733 * NAL unit stuff to context 0 and restart. Note that
1734 * rbsp_buffer is not transferred, but since we no longer
1735 * run in parallel mode this should not be an issue. */
1736 h->nal_unit_type = hx->nal_unit_type;
1737 h->nal_ref_idc = hx->nal_ref_idc;
1738 hx = h;
1739 goto again;
1740 }
1741 }
1742 }
1743 if (context_count) {
1744 ret = ff_h264_execute_decode_slices(h, context_count);
1745 if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
1746 goto end;
1747 }
1748
1749 ret = 0;
1750end:
1751 /* clean up */
1752 if (h->cur_pic_ptr && !h->droppable) {
1753 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
1754 h->picture_structure == PICT_BOTTOM_FIELD);
1755 }
1756
1757 return (ret < 0) ? ret : buf_index;
1758}
1759
1760/**
1761 * Return the number of bytes consumed for building the current frame.
1762 */
1763static int get_consumed_bytes(int pos, int buf_size)
1764{
1765 if (pos == 0)
1766 pos = 1; // avoid infinite loops (I doubt that is needed but...)
1767 if (pos + 10 > buf_size)
1768 pos = buf_size; // oops ;)
1769
1770 return pos;
1771}
1772
1773static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
1774{
1775 AVFrame *src = &srcp->f;
1776 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
1777 int i;
1778 int ret = av_frame_ref(dst, src);
1779 if (ret < 0)
1780 return ret;
1781
1782 av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(h), 0);
1783
1784 if (srcp->sei_recovery_frame_cnt == 0)
1785 dst->key_frame = 1;
1786 if (!srcp->crop)
1787 return 0;
1788
1789 for (i = 0; i < desc->nb_components; i++) {
1790 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
1791 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
1792 int off = ((srcp->crop_left >> hshift) << h->pixel_shift) +
1793 (srcp->crop_top >> vshift) * dst->linesize[i];
1794 dst->data[i] += off;
1795 }
1796 return 0;
1797}
1798
1799static int is_extra(const uint8_t *buf, int buf_size)
1800{
1801 int cnt= buf[5]&0x1f;
1802 const uint8_t *p= buf+6;
1803 while(cnt--){
1804 int nalsize= AV_RB16(p) + 2;
1805 if(nalsize > buf_size - (p-buf) || p[2]!=0x67)
1806 return 0;
1807 p += nalsize;
1808 }
1809 cnt = *(p++);
1810 if(!cnt)
1811 return 0;
1812 while(cnt--){
1813 int nalsize= AV_RB16(p) + 2;
1814 if(nalsize > buf_size - (p-buf) || p[2]!=0x68)
1815 return 0;
1816 p += nalsize;
1817 }
1818 return 1;
1819}
1820
1821static int h264_decode_frame(AVCodecContext *avctx, void *data,
1822 int *got_frame, AVPacket *avpkt)
1823{
1824 const uint8_t *buf = avpkt->data;
1825 int buf_size = avpkt->size;
1826 H264Context *h = avctx->priv_data;
1827 AVFrame *pict = data;
1828 int buf_index = 0;
1829 H264Picture *out;
1830 int i, out_idx;
1831 int ret;
1832
1833 h->flags = avctx->flags;
1834 /* reset data partitioning here, to ensure GetBitContexts from previous
1835 * packets do not get used. */
1836 h->data_partitioning = 0;
1837
1838 /* end of stream, output what is still in the buffers */
1839 if (buf_size == 0) {
1840 out:
1841
1842 h->cur_pic_ptr = NULL;
1843 h->first_field = 0;
1844
1845 // FIXME factorize this with the output code below
1846 out = h->delayed_pic[0];
1847 out_idx = 0;
1848 for (i = 1;
1849 h->delayed_pic[i] &&
1850 !h->delayed_pic[i]->f.key_frame &&
1851 !h->delayed_pic[i]->mmco_reset;
1852 i++)
1853 if (h->delayed_pic[i]->poc < out->poc) {
1854 out = h->delayed_pic[i];
1855 out_idx = i;
1856 }
1857
1858 for (i = out_idx; h->delayed_pic[i]; i++)
1859 h->delayed_pic[i] = h->delayed_pic[i + 1];
1860
1861 if (out) {
1862 out->reference &= ~DELAYED_PIC_REF;
1863 ret = output_frame(h, pict, out);
1864 if (ret < 0)
1865 return ret;
1866 *got_frame = 1;
1867 }
1868
1869 return buf_index;
1870 }
1871 if (h->is_avc && av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, NULL)) {
1872 int side_size;
1873 uint8_t *side = av_packet_get_side_data(avpkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
1874 if (is_extra(side, side_size))
1875 ff_h264_decode_extradata(h, side, side_size);
1876 }
1877 if(h->is_avc && buf_size >= 9 && buf[0]==1 && buf[2]==0 && (buf[4]&0xFC)==0xFC && (buf[5]&0x1F) && buf[8]==0x67){
1878 if (is_extra(buf, buf_size))
1879 return ff_h264_decode_extradata(h, buf, buf_size);
1880 }
1881
1882 buf_index = decode_nal_units(h, buf, buf_size, 0);
1883 if (buf_index < 0)
1884 return AVERROR_INVALIDDATA;
1885
1886 if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
1887 av_assert0(buf_index <= buf_size);
1888 goto out;
1889 }
1890
1891 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
1892 if (avctx->skip_frame >= AVDISCARD_NONREF ||
1893 buf_size >= 4 && !memcmp("Q264", buf, 4))
1894 return buf_size;
1895 av_log(avctx, AV_LOG_ERROR, "no frame!\n");
1896 return AVERROR_INVALIDDATA;
1897 }
1898
1899 if (!(avctx->flags2 & CODEC_FLAG2_CHUNKS) ||
1900 (h->mb_y >= h->mb_height && h->mb_height)) {
1901 if (avctx->flags2 & CODEC_FLAG2_CHUNKS)
1902 decode_postinit(h, 1);
1903
1904 ff_h264_field_end(h, 0);
1905
1906 /* Wait for second field. */
1907 *got_frame = 0;
1908 if (h->next_output_pic && (
1909 h->next_output_pic->recovered)) {
1910 if (!h->next_output_pic->recovered)
1911 h->next_output_pic->f.flags |= AV_FRAME_FLAG_CORRUPT;
1912
1913 ret = output_frame(h, pict, h->next_output_pic);
1914 if (ret < 0)
1915 return ret;
1916 *got_frame = 1;
1917 if (CONFIG_MPEGVIDEO) {
1918 ff_print_debug_info2(h->avctx, pict, h->er.mbskip_table,
1919 h->next_output_pic->mb_type,
1920 h->next_output_pic->qscale_table,
1921 h->next_output_pic->motion_val,
1922 &h->low_delay,
1923 h->mb_width, h->mb_height, h->mb_stride, 1);
1924 }
1925 }
1926 }
1927
1928 assert(pict->buf[0] || !*got_frame);
1929
1930 return get_consumed_bytes(buf_index, buf_size);
1931}
1932
1933av_cold void ff_h264_free_context(H264Context *h)
1934{
1935 int i;
1936
1937 ff_h264_free_tables(h, 1); // FIXME cleanup init stuff perhaps
1938
1939 for (i = 0; i < MAX_SPS_COUNT; i++)
1940 av_freep(h->sps_buffers + i);
1941
1942 for (i = 0; i < MAX_PPS_COUNT; i++)
1943 av_freep(h->pps_buffers + i);
1944}
1945
1946static av_cold int h264_decode_end(AVCodecContext *avctx)
1947{
1948 H264Context *h = avctx->priv_data;
1949
1950 ff_h264_remove_all_refs(h);
1951 ff_h264_free_context(h);
1952
1953 ff_h264_unref_picture(h, &h->cur_pic);
1954
1955 return 0;
1956}
1957
1958static const AVProfile profiles[] = {
1959 { FF_PROFILE_H264_BASELINE, "Baseline" },
1960 { FF_PROFILE_H264_CONSTRAINED_BASELINE, "Constrained Baseline" },
1961 { FF_PROFILE_H264_MAIN, "Main" },
1962 { FF_PROFILE_H264_EXTENDED, "Extended" },
1963 { FF_PROFILE_H264_HIGH, "High" },
1964 { FF_PROFILE_H264_HIGH_10, "High 10" },
1965 { FF_PROFILE_H264_HIGH_10_INTRA, "High 10 Intra" },
1966 { FF_PROFILE_H264_HIGH_422, "High 4:2:2" },
1967 { FF_PROFILE_H264_HIGH_422_INTRA, "High 4:2:2 Intra" },
1968 { FF_PROFILE_H264_HIGH_444, "High 4:4:4" },
1969 { FF_PROFILE_H264_HIGH_444_PREDICTIVE, "High 4:4:4 Predictive" },
1970 { FF_PROFILE_H264_HIGH_444_INTRA, "High 4:4:4 Intra" },
1971 { FF_PROFILE_H264_CAVLC_444, "CAVLC 4:4:4" },
1972 { FF_PROFILE_UNKNOWN },
1973};
1974
1975static const AVOption h264_options[] = {
1976 {"is_avc", "is avc", offsetof(H264Context, is_avc), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0},
1977 {"nal_length_size", "nal_length_size", offsetof(H264Context, nal_length_size), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 4, 0},
1978 {NULL}
1979};
1980
1981static const AVClass h264_class = {
1982 .class_name = "H264 Decoder",
1983 .item_name = av_default_item_name,
1984 .option = h264_options,
1985 .version = LIBAVUTIL_VERSION_INT,
1986};
1987
1988AVCodec ff_h264_decoder = {
1989 .name = "h264",
1990 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
1991 .type = AVMEDIA_TYPE_VIDEO,
1992 .id = AV_CODEC_ID_H264,
1993 .priv_data_size = sizeof(H264Context),
1994 .init = ff_h264_decode_init,
1995 .close = h264_decode_end,
1996 .decode = h264_decode_frame,
1997 .capabilities = /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 |
1998 CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS |
1999 CODEC_CAP_FRAME_THREADS,
2000 .flush = flush_dpb,
2001 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
2002 .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
2003 .profiles = NULL_IF_CONFIG_SMALL(profiles),
2004 .priv_class = &h264_class,
2005};
2006
2007#if CONFIG_H264_VDPAU_DECODER
2008static const AVClass h264_vdpau_class = {
2009 .class_name = "H264 VDPAU Decoder",
2010 .item_name = av_default_item_name,
2011 .option = h264_options,
2012 .version = LIBAVUTIL_VERSION_INT,
2013};
2014
2015AVCodec ff_h264_vdpau_decoder = {
2016 .name = "h264_vdpau",
2017 .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
2018 .type = AVMEDIA_TYPE_VIDEO,
2019 .id = AV_CODEC_ID_H264,
2020 .priv_data_size = sizeof(H264Context),
2021 .init = ff_h264_decode_init,
2022 .close = h264_decode_end,
2023 .decode = h264_decode_frame,
2024 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
2025 .flush = flush_dpb,
2026 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_H264,
2027 AV_PIX_FMT_NONE},
2028 .profiles = NULL_IF_CONFIG_SMALL(profiles),
2029 .priv_class = &h264_vdpau_class,
2030};
2031#endif
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