h264_sei: Add namespace prefix to all SEI values
[libav.git] / libavcodec / h264_parser.c
CommitLineData
26b4fe82
AJ
1/*
2 * H.26L/H.264/AVC/JVT/14496-10/... parser
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
2912e87a 5 * This file is part of Libav.
26b4fe82 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
26b4fe82
AJ
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 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
26b4fe82
AJ
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
2912e87a 18 * License along with Libav; if not, write to the Free Software
26b4fe82 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26b4fe82
AJ
20 */
21
22/**
ba87f080 23 * @file
41ed7ab4 24 * H.264 / AVC / MPEG-4 part10 parser.
26b4fe82
AJ
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
02cd8bb9
DB
28#include <assert.h>
29#include <stdint.h>
30
31#include "libavutil/avutil.h"
32#include "libavutil/error.h"
33#include "libavutil/log.h"
34#include "libavutil/mem.h"
35#include "libavutil/pixfmt.h"
36
b24dafe1 37#include "avcodec.h"
02cd8bb9 38#include "get_bits.h"
d4c2103b 39#include "golomb_legacy.h"
251cbb44 40#include "h264.h"
728d90a0 41#include "h264_sei.h"
f638b67e 42#include "h264_ps.h"
02cd8bb9 43#include "h264data.h"
f1e93986 44#include "internal.h"
e0c16e4e 45#include "mpegutils.h"
02cd8bb9 46#include "parser.h"
26b4fe82 47
9404a47a 48typedef struct H264ParseContext {
9404a47a 49 ParseContext pc;
3176217c 50 H264ParamSets ps;
113aeee6 51 H264DSPContext h264dsp;
c8dcff0c 52 H264POCContext poc;
728d90a0 53 H264SEIContext sei;
98c97994
AK
54 int is_avc;
55 int nal_length_size;
9404a47a 56 int got_first;
72da8d9b 57 int picture_structure;
9404a47a 58} H264ParseContext;
26b4fe82 59
9404a47a
AK
60
61static int h264_find_frame_end(H264ParseContext *p, const uint8_t *buf,
f8a4d5e9 62 int buf_size)
26b4fe82
AJ
63{
64 int i;
65 uint32_t state;
9404a47a 66 ParseContext *pc = &p->pc;
26b4fe82 67// mb_addr= pc->mb_addr - 1;
f8a4d5e9
LB
68 state = pc->state;
69 if (state > 13)
70 state = 7;
26b4fe82 71
f8a4d5e9
LB
72 for (i = 0; i < buf_size; i++) {
73 if (state == 7) {
113aeee6 74 i += p->h264dsp.startcode_find_candidate(buf + i, buf_size - i);
218d6844
BA
75 if (i < buf_size)
76 state = 2;
f8a4d5e9
LB
77 } else if (state <= 2) {
78 if (buf[i] == 1)
79 state ^= 5; // 2->7, 1->4, 0->5
80 else if (buf[i])
81 state = 7;
82 else
83 state >>= 1; // 2->1, 1->0, 0->0
84 } else if (state <= 5) {
dc971acf 85 int nalu_type = buf[i] & 0x1F;
5c2fb561
AK
86 if (nalu_type == H264_NAL_SEI || nalu_type == H264_NAL_SPS ||
87 nalu_type == H264_NAL_PPS || nalu_type == H264_NAL_AUD) {
f8a4d5e9 88 if (pc->frame_start_found) {
26b4fe82 89 i++;
9aa1cfec 90 goto found;
26b4fe82 91 }
5c2fb561
AK
92 } else if (nalu_type == H264_NAL_SLICE || nalu_type == H264_NAL_DPA ||
93 nalu_type == H264_NAL_IDR_SLICE) {
f8a4d5e9
LB
94 if (pc->frame_start_found) {
95 state += 8;
26b4fe82 96 continue;
f8a4d5e9 97 } else
26b4fe82
AJ
98 pc->frame_start_found = 1;
99 }
f8a4d5e9
LB
100 state = 7;
101 } else {
58ae8d59 102 // first_mb_in_slice is 0, probably the first nal of a new slice
f8a4d5e9 103 if (buf[i] & 0x80)
26b4fe82 104 goto found;
f8a4d5e9 105 state = 7;
26b4fe82
AJ
106 }
107 }
f8a4d5e9 108 pc->state = state;
26b4fe82 109 return END_NOT_FOUND;
9aa1cfec
DP
110
111found:
f8a4d5e9
LB
112 pc->state = 7;
113 pc->frame_start_found = 0;
114 return i - (state & 5);
26b4fe82
AJ
115}
116
72da8d9b
AK
117static int scan_mmco_reset(AVCodecParserContext *s, GetBitContext *gb,
118 AVCodecContext *avctx)
4baba6c8 119{
44d16df4
AK
120 H264PredWeightTable pwt;
121 int slice_type_nos = s->pict_type & 3;
9404a47a 122 H264ParseContext *p = s->priv_data;
a6e27f7a 123 int list_count, ref_count[2];
4baba6c8 124
4baba6c8 125
3176217c 126 if (p->ps.pps->redundant_pic_cnt_present)
44d16df4 127 get_ue_golomb(gb); // redundant_pic_count
4baba6c8 128
44d16df4
AK
129 if (slice_type_nos == AV_PICTURE_TYPE_B)
130 get_bits1(gb); // direct_spatial_mv_pred
e9f88441 131
3176217c 132 if (ff_h264_parse_ref_count(&list_count, ref_count, gb, p->ps.pps,
72da8d9b 133 slice_type_nos, p->picture_structure) < 0)
4baba6c8
YN
134 return AVERROR_INVALIDDATA;
135
44d16df4 136 if (slice_type_nos != AV_PICTURE_TYPE_I) {
4baba6c8 137 int list;
a6e27f7a 138 for (list = 0; list < list_count; list++) {
44d16df4 139 if (get_bits1(gb)) {
4baba6c8
YN
140 int index;
141 for (index = 0; ; index++) {
44d16df4 142 unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(gb);
4baba6c8
YN
143
144 if (reordering_of_pic_nums_idc < 3)
44d16df4 145 get_ue_golomb(gb);
4baba6c8 146 else if (reordering_of_pic_nums_idc > 3) {
72da8d9b 147 av_log(avctx, AV_LOG_ERROR,
4baba6c8
YN
148 "illegal reordering_of_pic_nums_idc %d\n",
149 reordering_of_pic_nums_idc);
150 return AVERROR_INVALIDDATA;
151 } else
152 break;
153
a6e27f7a 154 if (index >= ref_count[list]) {
72da8d9b 155 av_log(avctx, AV_LOG_ERROR,
73e8fab3 156 "reference count %d overflow\n", index);
4baba6c8
YN
157 return AVERROR_INVALIDDATA;
158 }
159 }
160 }
161 }
162 }
163
3176217c
AK
164 if ((p->ps.pps->weighted_pred && slice_type_nos == AV_PICTURE_TYPE_P) ||
165 (p->ps.pps->weighted_bipred_idc == 1 && slice_type_nos == AV_PICTURE_TYPE_B))
166 ff_h264_pred_weight_table(gb, p->ps.sps, ref_count, slice_type_nos,
44d16df4 167 &pwt);
4baba6c8 168
44d16df4 169 if (get_bits1(gb)) { // adaptive_ref_pic_marking_mode_flag
4baba6c8
YN
170 int i;
171 for (i = 0; i < MAX_MMCO_COUNT; i++) {
44d16df4 172 MMCOOpcode opcode = get_ue_golomb_31(gb);
4baba6c8 173 if (opcode > (unsigned) MMCO_LONG) {
72da8d9b 174 av_log(avctx, AV_LOG_ERROR,
4baba6c8
YN
175 "illegal memory management control operation %d\n",
176 opcode);
177 return AVERROR_INVALIDDATA;
178 }
179 if (opcode == MMCO_END)
180 return 0;
181 else if (opcode == MMCO_RESET)
182 return 1;
183
184 if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG)
44d16df4 185 get_ue_golomb(gb);
4baba6c8
YN
186 if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
187 opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG)
44d16df4 188 get_ue_golomb_31(gb);
4baba6c8
YN
189 }
190 }
191
192 return 0;
193}
194
adbfc605 195/**
ff6474dd
IS
196 * Parse NAL units of found picture and decode some basic information.
197 *
198 * @param s parser context.
199 * @param avctx codec context.
200 * @param buf buffer with field/frame data.
201 * @param buf_size size of the buffer.
202 */
203static inline int parse_nal_units(AVCodecParserContext *s,
204 AVCodecContext *avctx,
205 const uint8_t *buf, int buf_size)
206{
9404a47a 207 H264ParseContext *p = s->priv_data;
ff6474dd 208 const uint8_t *buf_end = buf + buf_size;
8d0cc8ca
AK
209
210 H2645NAL nal = { NULL };
211
96c3da93 212 unsigned int pps_id;
ff6474dd 213 unsigned int slice_type;
4baba6c8 214 int state = -1, got_reset = 0;
3f1a7ceb 215 int field_poc[2];
8d0cc8ca 216 int ret;
ff6474dd
IS
217
218 /* set some sane default values */
f8a4d5e9
LB
219 s->pict_type = AV_PICTURE_TYPE_I;
220 s->key_frame = 0;
3f1a7ceb 221 s->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
ff6474dd 222
728d90a0 223 ff_h264_sei_uninit(&p->sei);
ff6474dd 224
9479415e
BC
225 if (!buf_size)
226 return 0;
227
f8a4d5e9 228 for (;;) {
3176217c 229 const SPS *sps;
8d0cc8ca 230 int src_length, consumed;
f1e93986 231 buf = avpriv_find_start_code(buf, buf_end, &state);
f8a4d5e9 232 if (buf >= buf_end)
ff6474dd
IS
233 break;
234 --buf;
235 src_length = buf_end - buf;
236 switch (state & 0x1f) {
5c2fb561
AK
237 case H264_NAL_SLICE:
238 case H264_NAL_IDR_SLICE:
ff6474dd 239 // Do not walk the whole buffer just to decode slice header
5c2fb561 240 if ((state & 0x1f) == H264_NAL_IDR_SLICE || ((state >> 5) & 0x3) == 0) {
4baba6c8
YN
241 /* IDR or disposable slice
242 * No need to decode many bytes because MMCOs shall not be present. */
243 if (src_length > 60)
244 src_length = 60;
245 } else {
246 /* To decode up to MMCOs */
247 if (src_length > 1000)
248 src_length = 1000;
249 }
ff6474dd
IS
250 break;
251 }
8d0cc8ca
AK
252
253 consumed = ff_h2645_extract_rbsp(buf, src_length, &nal);
254 if (consumed < 0)
ff6474dd
IS
255 break;
256
8d0cc8ca
AK
257 ret = init_get_bits(&nal.gb, nal.data, nal.size * 8);
258 if (ret < 0)
259 goto fail;
260 get_bits1(&nal.gb);
261 nal.ref_idc = get_bits(&nal.gb, 2);
262 nal.type = get_bits(&nal.gb, 5);
263
72da8d9b 264 switch (nal.type) {
5c2fb561 265 case H264_NAL_SPS:
3176217c 266 ff_h264_decode_seq_parameter_set(&nal.gb, avctx, &p->ps);
ff6474dd 267 break;
5c2fb561 268 case H264_NAL_PPS:
3176217c
AK
269 ff_h264_decode_picture_parameter_set(&nal.gb, avctx, &p->ps,
270 nal.size_bits);
ff6474dd 271 break;
5c2fb561 272 case H264_NAL_SEI:
728d90a0 273 ff_h264_sei_decode(&p->sei, &nal.gb, &p->ps, avctx);
ff6474dd 274 break;
5c2fb561 275 case H264_NAL_IDR_SLICE:
0ed260c7 276 s->key_frame = 1;
3f1a7ceb 277
c8dcff0c
AK
278 p->poc.prev_frame_num = 0;
279 p->poc.prev_frame_num_offset = 0;
280 p->poc.prev_poc_msb =
281 p->poc.prev_poc_lsb = 0;
f8a4d5e9 282 /* fall through */
5c2fb561 283 case H264_NAL_SLICE:
44d16df4
AK
284 get_ue_golomb(&nal.gb); // skip first_mb_in_slice
285 slice_type = get_ue_golomb_31(&nal.gb);
a7da517f 286 s->pict_type = ff_h264_golomb_to_pict_type[slice_type % 5];
728d90a0 287 if (p->sei.recovery_point.recovery_frame_cnt >= 0) {
0ed260c7
IS
288 /* key frame, since recovery_frame_cnt is set */
289 s->key_frame = 1;
290 }
44d16df4 291 pps_id = get_ue_golomb(&nal.gb);
f8a4d5e9 292 if (pps_id >= MAX_PPS_COUNT) {
72da8d9b 293 av_log(avctx, AV_LOG_ERROR,
73e8fab3 294 "pps_id %u out of range\n", pps_id);
8d0cc8ca 295 goto fail;
96c3da93 296 }
3176217c 297 if (!p->ps.pps_list[pps_id]) {
72da8d9b 298 av_log(avctx, AV_LOG_ERROR,
73e8fab3 299 "non-existing PPS %u referenced\n", pps_id);
8d0cc8ca 300 goto fail;
96c3da93 301 }
3176217c
AK
302 p->ps.pps = (const PPS*)p->ps.pps_list[pps_id]->data;
303 if (!p->ps.sps_list[p->ps.pps->sps_id]) {
72da8d9b 304 av_log(avctx, AV_LOG_ERROR,
3176217c 305 "non-existing SPS %u referenced\n", p->ps.pps->sps_id);
8d0cc8ca 306 goto fail;
96c3da93 307 }
3176217c 308 p->ps.sps = (SPS*)p->ps.sps_list[p->ps.pps->sps_id]->data;
96c3da93 309
3176217c
AK
310 sps = p->ps.sps;
311
c8dcff0c 312 p->poc.frame_num = get_bits(&nal.gb, sps->log2_max_frame_num);
3176217c
AK
313
314 s->coded_width = 16 * sps->mb_width;
315 s->coded_height = 16 * sps->mb_height;
316 s->width = s->coded_width - (sps->crop_right + sps->crop_left);
317 s->height = s->coded_height - (sps->crop_top + sps->crop_bottom);
31d2039c
AK
318 if (s->width <= 0 || s->height <= 0) {
319 s->width = s->coded_width;
320 s->height = s->coded_height;
321 }
322
3176217c 323 switch (sps->bit_depth_luma) {
31d2039c 324 case 9:
72da8d9b
AK
325 if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P9;
326 else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P9;
327 else s->format = AV_PIX_FMT_YUV420P9;
31d2039c
AK
328 break;
329 case 10:
72da8d9b
AK
330 if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P10;
331 else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P10;
332 else s->format = AV_PIX_FMT_YUV420P10;
31d2039c
AK
333 break;
334 case 8:
72da8d9b
AK
335 if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P;
336 else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P;
337 else s->format = AV_PIX_FMT_YUV420P;
31d2039c
AK
338 break;
339 default:
340 s->format = AV_PIX_FMT_NONE;
341 }
342
3176217c
AK
343 avctx->profile = ff_h264_get_profile(sps);
344 avctx->level = sps->level_idc;
dd0cd3d2 345
3176217c 346 if (sps->frame_mbs_only_flag) {
72da8d9b 347 p->picture_structure = PICT_FRAME;
f8a4d5e9 348 } else {
44d16df4 349 if (get_bits1(&nal.gb)) { // field_pic_flag
72da8d9b 350 p->picture_structure = PICT_TOP_FIELD + get_bits1(&nal.gb); // bottom_field_flag
96c3da93 351 } else {
72da8d9b 352 p->picture_structure = PICT_FRAME;
96c3da93
IS
353 }
354 }
355
5c2fb561 356 if (nal.type == H264_NAL_IDR_SLICE)
44d16df4 357 get_ue_golomb(&nal.gb); /* idr_pic_id */
3176217c 358 if (sps->poc_type == 0) {
c8dcff0c 359 p->poc.poc_lsb = get_bits(&nal.gb, sps->log2_max_poc_lsb);
3f1a7ceb 360
3176217c 361 if (p->ps.pps->pic_order_present == 1 &&
72da8d9b 362 p->picture_structure == PICT_FRAME)
c8dcff0c 363 p->poc.delta_poc_bottom = get_se_golomb(&nal.gb);
3f1a7ceb
YN
364 }
365
3176217c
AK
366 if (sps->poc_type == 1 &&
367 !sps->delta_pic_order_always_zero_flag) {
c8dcff0c 368 p->poc.delta_poc[0] = get_se_golomb(&nal.gb);
3f1a7ceb 369
3176217c 370 if (p->ps.pps->pic_order_present == 1 &&
72da8d9b 371 p->picture_structure == PICT_FRAME)
c8dcff0c 372 p->poc.delta_poc[1] = get_se_golomb(&nal.gb);
3f1a7ceb
YN
373 }
374
4baba6c8
YN
375 /* Decode POC of this picture.
376 * The prev_ values needed for decoding POC of the next picture are not set here. */
b81dbd6c 377 field_poc[0] = field_poc[1] = INT_MAX;
c8dcff0c 378 ff_h264_init_poc(field_poc, &s->output_picture_number, sps,
72da8d9b 379 &p->poc, p->picture_structure, nal.ref_idc);
3f1a7ceb 380
4baba6c8
YN
381 /* Continue parsing to check if MMCO_RESET is present.
382 * FIXME: MMCO_RESET could appear in non-first slice.
383 * Maybe, we should parse all undisposable non-IDR slice of this
384 * picture until encountering MMCO_RESET in a slice of it. */
5c2fb561 385 if (nal.ref_idc && nal.type != H264_NAL_IDR_SLICE) {
72da8d9b 386 got_reset = scan_mmco_reset(s, &nal.gb, avctx);
4baba6c8 387 if (got_reset < 0)
8d0cc8ca 388 goto fail;
4baba6c8
YN
389 }
390
b81dbd6c 391 /* Set up the prev_ values for decoding POC of the next picture. */
c8dcff0c
AK
392 p->poc.prev_frame_num = got_reset ? 0 : p->poc.frame_num;
393 p->poc.prev_frame_num_offset = got_reset ? 0 : p->poc.frame_num_offset;
72da8d9b 394 if (nal.ref_idc != 0) {
4baba6c8 395 if (!got_reset) {
c8dcff0c
AK
396 p->poc.prev_poc_msb = p->poc.poc_msb;
397 p->poc.prev_poc_lsb = p->poc.poc_lsb;
4baba6c8 398 } else {
c8dcff0c
AK
399 p->poc.prev_poc_msb = 0;
400 p->poc.prev_poc_lsb =
72da8d9b 401 p->picture_structure == PICT_BOTTOM_FIELD ? 0 : field_poc[0];
4baba6c8 402 }
b81dbd6c
YN
403 }
404
d7b2bb53 405 if (sps->pic_struct_present_flag && p->sei.picture_timing.present) {
728d90a0 406 switch (p->sei.picture_timing.pic_struct) {
6ea220cb
MT
407 case H264_SEI_PIC_STRUCT_TOP_FIELD:
408 case H264_SEI_PIC_STRUCT_BOTTOM_FIELD:
f8a4d5e9
LB
409 s->repeat_pict = 0;
410 break;
6ea220cb
MT
411 case H264_SEI_PIC_STRUCT_FRAME:
412 case H264_SEI_PIC_STRUCT_TOP_BOTTOM:
413 case H264_SEI_PIC_STRUCT_BOTTOM_TOP:
f8a4d5e9
LB
414 s->repeat_pict = 1;
415 break;
6ea220cb
MT
416 case H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
417 case H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
f8a4d5e9
LB
418 s->repeat_pict = 2;
419 break;
6ea220cb 420 case H264_SEI_PIC_STRUCT_FRAME_DOUBLING:
f8a4d5e9
LB
421 s->repeat_pict = 3;
422 break;
6ea220cb 423 case H264_SEI_PIC_STRUCT_FRAME_TRIPLING:
f8a4d5e9
LB
424 s->repeat_pict = 5;
425 break;
426 default:
72da8d9b 427 s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
f8a4d5e9 428 break;
346db3ef
IS
429 }
430 } else {
72da8d9b 431 s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
346db3ef
IS
432 }
433
72da8d9b 434 if (p->picture_structure == PICT_FRAME) {
3f1a7ceb 435 s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
d7b2bb53 436 if (sps->pic_struct_present_flag && p->sei.picture_timing.present) {
728d90a0 437 switch (p->sei.picture_timing.pic_struct) {
6ea220cb
MT
438 case H264_SEI_PIC_STRUCT_TOP_BOTTOM:
439 case H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
f8a4d5e9
LB
440 s->field_order = AV_FIELD_TT;
441 break;
6ea220cb
MT
442 case H264_SEI_PIC_STRUCT_BOTTOM_TOP:
443 case H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
f8a4d5e9
LB
444 s->field_order = AV_FIELD_BB;
445 break;
446 default:
447 s->field_order = AV_FIELD_PROGRESSIVE;
448 break;
3f1a7ceb
YN
449 }
450 } else {
451 if (field_poc[0] < field_poc[1])
452 s->field_order = AV_FIELD_TT;
453 else if (field_poc[0] > field_poc[1])
454 s->field_order = AV_FIELD_BB;
455 else
456 s->field_order = AV_FIELD_PROGRESSIVE;
457 }
458 } else {
72da8d9b 459 if (p->picture_structure == PICT_TOP_FIELD)
3f1a7ceb
YN
460 s->picture_structure = AV_PICTURE_STRUCTURE_TOP_FIELD;
461 else
462 s->picture_structure = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
463 s->field_order = AV_FIELD_UNKNOWN;
464 }
465
8d0cc8ca 466 av_freep(&nal.rbsp_buffer);
ff6474dd
IS
467 return 0; /* no need to evaluate the rest */
468 }
469 buf += consumed;
470 }
471 /* didn't find a picture! */
72da8d9b 472 av_log(avctx, AV_LOG_ERROR, "missing picture in access unit\n");
8d0cc8ca
AK
473fail:
474 av_freep(&nal.rbsp_buffer);
ff6474dd
IS
475 return -1;
476}
477
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AJ
478static int h264_parse(AVCodecParserContext *s,
479 AVCodecContext *avctx,
480 const uint8_t **poutbuf, int *poutbuf_size,
481 const uint8_t *buf, int buf_size)
482{
9404a47a 483 H264ParseContext *p = s->priv_data;
9404a47a 484 ParseContext *pc = &p->pc;
26b4fe82
AJ
485 int next;
486
9404a47a
AK
487 if (!p->got_first) {
488 p->got_first = 1;
23584bec 489 if (avctx->extradata_size) {
98c97994
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490 ff_h264_decode_extradata(avctx->extradata, avctx->extradata_size,
491 &p->ps, &p->is_avc, &p->nal_length_size,
492 avctx->err_recognition, avctx);
23584bec
HC
493 }
494 }
495
f8a4d5e9
LB
496 if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
497 next = buf_size;
498 } else {
9404a47a 499 next = h264_find_frame_end(p, buf, buf_size);
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AJ
500
501 if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
f8a4d5e9 502 *poutbuf = NULL;
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AJ
503 *poutbuf_size = 0;
504 return buf_size;
505 }
506
f8a4d5e9
LB
507 if (next < 0 && next != END_NOT_FOUND) {
508 assert(pc->last_index + next >= 0);
9404a47a 509 h264_find_frame_end(p, &pc->buffer[pc->last_index + next], -next); // update state
26b4fe82 510 }
a26ce1e2 511 }
ff6474dd 512
25f05ddb 513 parse_nal_units(s, avctx, buf, buf_size);
c733922e 514
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515 if (p->sei.picture_timing.cpb_removal_delay >= 0) {
516 s->dts_sync_point = p->sei.buffering_period.present;
517 s->dts_ref_dts_delta = p->sei.picture_timing.cpb_removal_delay;
518 s->pts_dts_delta = p->sei.picture_timing.dpb_output_delay;
25f05ddb
PL
519 } else {
520 s->dts_sync_point = INT_MIN;
521 s->dts_ref_dts_delta = INT_MIN;
522 s->pts_dts_delta = INT_MIN;
523 }
524
525 if (s->flags & PARSER_FLAG_ONCE) {
526 s->flags &= PARSER_FLAG_COMPLETE_FRAMES;
527 }
26b4fe82 528
f8a4d5e9 529 *poutbuf = buf;
26b4fe82
AJ
530 *poutbuf_size = buf_size;
531 return next;
532}
533
534static int h264_split(AVCodecContext *avctx,
535 const uint8_t *buf, int buf_size)
536{
537 int i;
538 uint32_t state = -1;
f8a4d5e9
LB
539 int has_sps = 0;
540
541 for (i = 0; i <= buf_size; i++) {
542 if ((state & 0xFFFFFF1F) == 0x107)
543 has_sps = 1;
544 /* if((state&0xFFFFFF1F) == 0x101 ||
545 * (state&0xFFFFFF1F) == 0x102 ||
546 * (state&0xFFFFFF1F) == 0x105) {
547 * }
548 */
1b667269
JS
549 if ((state & 0xFFFFFF00) == 0x100 && (state & 0xFFFFFF1F) != 0x106 &&
550 (state & 0xFFFFFF1F) != 0x107 && (state & 0xFFFFFF1F) != 0x108 &&
551 (state & 0xFFFFFF1F) != 0x109 && (state & 0xFFFFFF1F) != 0x10d &&
552 (state & 0xFFFFFF1F) != 0x10f) {
f8a4d5e9
LB
553 if (has_sps) {
554 while (i > 4 && buf[i - 5] == 0)
555 i--;
556 return i - 4;
26b4fe82
AJ
557 }
558 }
f8a4d5e9
LB
559 if (i < buf_size)
560 state = (state << 8) | buf[i];
26b4fe82
AJ
561 }
562 return 0;
563}
564
8161220e 565static void h264_close(AVCodecParserContext *s)
3ee4f5e4 566{
9404a47a 567 H264ParseContext *p = s->priv_data;
9404a47a 568 ParseContext *pc = &p->pc;
3176217c 569 int i;
3ee4f5e4
MN
570
571 av_free(pc->buffer);
3176217c 572
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573 ff_h264_sei_uninit(&p->sei);
574
3176217c
AK
575 for (i = 0; i < FF_ARRAY_ELEMS(p->ps.sps_list); i++)
576 av_buffer_unref(&p->ps.sps_list[i]);
577
578 for (i = 0; i < FF_ARRAY_ELEMS(p->ps.pps_list); i++)
579 av_buffer_unref(&p->ps.pps_list[i]);
3ee4f5e4
MN
580}
581
6fee1b90 582static av_cold int init(AVCodecParserContext *s)
e9ca315d 583{
9404a47a 584 H264ParseContext *p = s->priv_data;
92c6c2a6 585
113aeee6 586 ff_h264dsp_init(&p->h264dsp, 8, 1);
e9ca315d
RC
587 return 0;
588}
26b4fe82 589
d36beb3f 590AVCodecParser ff_h264_parser = {
36ef5369 591 .codec_ids = { AV_CODEC_ID_H264 },
9404a47a 592 .priv_data_size = sizeof(H264ParseContext),
5511ad14
AK
593 .parser_init = init,
594 .parser_parse = h264_parse,
8161220e 595 .parser_close = h264_close,
5511ad14 596 .split = h264_split,
26b4fe82 597};