FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/h264_parser.c
Date: 2025-10-10 03:51:19
Exec Total Coverage
Lines: 337 387 87.1%
Functions: 7 7 100.0%
Branches: 243 291 83.5%
Line Branch Exec Source
1 /*
2 * H.26L/H.264/AVC/JVT/14496-10/... parser
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 / MPEG-4 part10 parser.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
28 #define UNCHECKED_BITSTREAM_READER 1
29
30 #include <stdint.h>
31
32 #include "libavutil/attributes.h"
33 #include "libavutil/avutil.h"
34 #include "libavutil/error.h"
35 #include "libavutil/log.h"
36 #include "libavutil/mem.h"
37 #include "libavutil/pixfmt.h"
38
39 #include "avcodec.h"
40 #include "get_bits.h"
41 #include "golomb.h"
42 #include "h264.h"
43 #include "h264dsp.h"
44 #include "h264_parse.h"
45 #include "h264_sei.h"
46 #include "h264_ps.h"
47 #include "h2645_parse.h"
48 #include "h264data.h"
49 #include "mpegutils.h"
50 #include "parser.h"
51 #include "libavutil/refstruct.h"
52 #include "startcode.h"
53
54 typedef struct H264ParseContext {
55 ParseContext pc;
56 H264ParamSets ps;
57 H264DSPContext h264dsp;
58 H264POCContext poc;
59 H264SEIContext sei;
60 int is_avc;
61 int nal_length_size;
62 int got_first;
63 int picture_structure;
64 uint8_t parse_history[6];
65 int parse_history_count;
66 int parse_last_mb;
67 int64_t reference_dts;
68 int last_frame_num, last_picture_structure;
69 } H264ParseContext;
70
71 39547 static int find_start_code(const uint8_t *buf, int buf_size,
72 int buf_index, int next_avc)
73 {
74 39547 uint32_t state = -1;
75
76 39547 buf_index = avpriv_find_start_code(buf + buf_index, buf + next_avc + 1, &state) - buf - 1;
77
78 39547 return FFMIN(buf_index, buf_size);
79 }
80
81 186424 static int h264_find_frame_end(H264ParseContext *p, const uint8_t *buf,
82 int buf_size, void *logctx)
83 {
84 int i, j;
85 uint32_t state;
86 186424 ParseContext *pc = &p->pc;
87
88
1/2
✓ Branch 0 taken 186424 times.
✗ Branch 1 not taken.
 186424 int next_avc = p->is_avc ? 0 : buf_size;
89 // mb_addr= pc->mb_addr - 1;
90 186424 state = pc->state;
91
2/2
✓ Branch 0 taken 96 times.
✓ Branch 1 taken 186328 times.
 186424 if (state > 13)
92 96 state = 7;
93
94
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 186424 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 186424 if (p->is_avc && !p->nal_length_size)
95 ✗ av_log(logctx, AV_LOG_ERROR, "AVC-parser: nal length size invalid\n");
96
97
2/2
✓ Branch 0 taken 2573588 times.
✓ Branch 1 taken 159795 times.
 2733383 for (i = 0; i < buf_size; i++) {
98
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2573588 times.
 2573588 if (i >= next_avc) {
99 ✗ int64_t nalsize = 0;
100 ✗ i = next_avc;
101 ✗ for (j = 0; j < p->nal_length_size; j++)
102 ✗ nalsize = (nalsize << 8) | buf[i++];
103 ✗ if (!nalsize || nalsize > buf_size - i) {
104 ✗ av_log(logctx, AV_LOG_ERROR, "AVC-parser: nal size %"PRId64" "
105 "remaining %d\n", nalsize, buf_size - i);
106 ✗ return buf_size;
107 }
108 ✗ next_avc = i + nalsize;
109 ✗ state = 5;
110 }
111
112
2/2
✓ Branch 0 taken 1208147 times.
✓ Branch 1 taken 1365441 times.
 2573588 if (state == 7) {
113 1208147 i += p->h264dsp.startcode_find_candidate(buf + i, next_avc - i);
114
2/2
✓ Branch 0 taken 1051144 times.
✓ Branch 1 taken 157003 times.
 1208147 if (i < next_avc)
115 1051144 state = 2;
116
2/2
✓ Branch 0 taken 1225015 times.
✓ Branch 1 taken 140426 times.
 1365441 } else if (state <= 2) {
117
2/2
✓ Branch 0 taken 100173 times.
✓ Branch 1 taken 1124842 times.
 1225015 if (buf[i] == 1)
118 100173 state ^= 5; // 2->7, 1->4, 0->5
119
2/2
✓ Branch 0 taken 951225 times.
✓ Branch 1 taken 173617 times.
 1124842 else if (buf[i])
120 951225 state = 7;
121 else
122 173617 state >>= 1; // 2->1, 1->0, 0->0
123
2/2
✓ Branch 0 taken 75218 times.
✓ Branch 1 taken 65208 times.
 140426 } else if (state <= 5) {
124 75218 int nalu_type = buf[i] & 0x1F;
125
6/6
✓ Branch 0 taken 72975 times.
✓ Branch 1 taken 2243 times.
✓ Branch 2 taken 71549 times.
✓ Branch 3 taken 1426 times.
✓ Branch 4 taken 58649 times.
✓ Branch 5 taken 12900 times.
 75218 if (nalu_type == H264_NAL_SEI || nalu_type == H264_NAL_SPS ||
126
2/2
✓ Branch 0 taken 4620 times.
✓ Branch 1 taken 54029 times.
 58649 nalu_type == H264_NAL_PPS || nalu_type == H264_NAL_AUD) {
127
2/2
✓ Branch 0 taken 8780 times.
✓ Branch 1 taken 12409 times.
 21189 if (pc->frame_start_found) {
128 8780 i++;
129 8780 goto found;
130 }
131
5/6
✓ Branch 0 taken 1842 times.
✓ Branch 1 taken 52187 times.
✓ Branch 2 taken 1842 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 1308 times.
✓ Branch 5 taken 534 times.
 54029 } else if (nalu_type == H264_NAL_SLICE || nalu_type == H264_NAL_DPA ||
132 nalu_type == H264_NAL_IDR_SLICE) {
133 53495 state += 8;
134 53495 continue;
135 }
136 12943 state = 7;
137 } else {
138 65208 unsigned int mb, last_mb = p->parse_last_mb;
139 GetBitContext gb;
140 65208 p->parse_history[p->parse_history_count++] = buf[i];
141
142 65208 init_get_bits(&gb, p->parse_history, 8*p->parse_history_count);
143 65208 mb= get_ue_golomb_long(&gb);
144
3/4
✓ Branch 1 taken 11713 times.
✓ Branch 2 taken 53495 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 11713 times.
 65208 if (get_bits_left(&gb) > 0 || p->parse_history_count > 5) {
145 53495 p->parse_last_mb = mb;
146
2/2
✓ Branch 0 taken 26630 times.
✓ Branch 1 taken 26865 times.
 53495 if (pc->frame_start_found) {
147
2/2
✓ Branch 0 taken 17849 times.
✓ Branch 1 taken 8781 times.
 26630 if (mb <= last_mb) {
148 17849 i -= p->parse_history_count - 1;
149 17849 p->parse_history_count = 0;
150 17849 goto found;
151 }
152 } else
153 26865 pc->frame_start_found = 1;
154 35646 p->parse_history_count = 0;
155 35646 state = 7;
156 }
157 }
158 }
159 159795 pc->state = state;
160
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 159795 times.
 159795 if (p->is_avc)
161 ✗ return next_avc;
162 159795 return END_NOT_FOUND;
163
164 26629 found:
165 26629 pc->state = 7;
166 26629 pc->frame_start_found = 0;
167
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 26629 times.
 26629 if (p->is_avc)
168 ✗ return next_avc;
169 26629 return i - (state & 5);
170 }
171
172 20681 static int scan_mmco_reset(AVCodecParserContext *s, GetBitContext *gb,
173 void *logctx)
174 {
175 H264PredWeightTable pwt;
176 20681 int slice_type_nos = s->pict_type & 3;
177 20681 H264ParseContext *p = s->priv_data;
178 int list_count, ref_count[2];
179
180
181
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 20681 times.
 20681 if (p->ps.pps->redundant_pic_cnt_present)
182 ✗ get_ue_golomb(gb); // redundant_pic_count
183
184
2/2
✓ Branch 0 taken 1134 times.
✓ Branch 1 taken 19547 times.
 20681 if (slice_type_nos == AV_PICTURE_TYPE_B)
185 1134 get_bits1(gb); // direct_spatial_mv_pred
186
187
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 20681 times.
 20681 if (ff_h264_parse_ref_count(&list_count, ref_count, gb, p->ps.pps,
188 slice_type_nos, p->picture_structure, logctx) < 0)
189 ✗ return AVERROR_INVALIDDATA;
190
191
2/2
✓ Branch 0 taken 18854 times.
✓ Branch 1 taken 1827 times.
 20681 if (slice_type_nos != AV_PICTURE_TYPE_I) {
192 int list;
193
2/2
✓ Branch 0 taken 19988 times.
✓ Branch 1 taken 18854 times.
 38842 for (list = 0; list < list_count; list++) {
194
2/2
✓ Branch 1 taken 3149 times.
✓ Branch 2 taken 16839 times.
 19988 if (get_bits1(gb)) {
195 int index;
196 15108 for (index = 0; ; index++) {
197 15108 unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(gb);
198
199
2/2
✓ Branch 0 taken 11959 times.
✓ Branch 1 taken 3149 times.
 15108 if (reordering_of_pic_nums_idc < 3)
200 11959 get_ue_golomb_long(gb);
201
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3149 times.
 3149 else if (reordering_of_pic_nums_idc > 3) {
202 ✗ av_log(logctx, AV_LOG_ERROR,
203 "illegal reordering_of_pic_nums_idc %d\n",
204 reordering_of_pic_nums_idc);
205 ✗ return AVERROR_INVALIDDATA;
206 } else
207 3149 break;
208
209
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 11959 times.
 11959 if (index >= ref_count[list]) {
210 ✗ av_log(logctx, AV_LOG_ERROR,
211 "reference count %d overflow\n", index);
212 ✗ return AVERROR_INVALIDDATA;
213 }
214 }
215 }
216 }
217 }
218
219
4/4
✓ Branch 0 taken 4008 times.
✓ Branch 1 taken 16673 times.
✓ Branch 2 taken 562 times.
✓ Branch 3 taken 3446 times.
 20681 if ((p->ps.pps->weighted_pred && slice_type_nos == AV_PICTURE_TYPE_P) ||
220
3/4
✓ Branch 0 taken 24 times.
✓ Branch 1 taken 17211 times.
✓ Branch 2 taken 24 times.
✗ Branch 3 not taken.
 17235 (p->ps.pps->weighted_bipred_idc == 1 && slice_type_nos == AV_PICTURE_TYPE_B))
221 3470 ff_h264_pred_weight_table(gb, p->ps.sps, ref_count, slice_type_nos,
222 &pwt, p->picture_structure, logctx);
223
224
2/2
✓ Branch 1 taken 2148 times.
✓ Branch 2 taken 18533 times.
 20681 if (get_bits1(gb)) { // adaptive_ref_pic_marking_mode_flag
225 int i;
226
1/2
✓ Branch 0 taken 6221 times.
✗ Branch 1 not taken.
 6221 for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {
227 6221 MMCOOpcode opcode = get_ue_golomb_31(gb);
228
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6221 times.
 6221 if (opcode > (unsigned) MMCO_LONG) {
229 ✗ av_log(logctx, AV_LOG_ERROR,
230 "illegal memory management control operation %d\n",
231 opcode);
232 ✗ return AVERROR_INVALIDDATA;
233 }
234
2/2
✓ Branch 0 taken 2098 times.
✓ Branch 1 taken 4123 times.
 6221 if (opcode == MMCO_END)
235 2098 return 0;
236
2/2
✓ Branch 0 taken 50 times.
✓ Branch 1 taken 4073 times.
 4123 else if (opcode == MMCO_RESET)
237 50 return 1;
238
239
4/4
✓ Branch 0 taken 808 times.
✓ Branch 1 taken 3265 times.
✓ Branch 2 taken 333 times.
✓ Branch 3 taken 475 times.
 4073 if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG)
240 3598 get_ue_golomb_long(gb); // difference_of_pic_nums_minus1
241
6/6
✓ Branch 0 taken 3740 times.
✓ Branch 1 taken 333 times.
✓ Branch 2 taken 3660 times.
✓ Branch 3 taken 80 times.
✓ Branch 4 taken 3644 times.
✓ Branch 5 taken 16 times.
 4073 if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
242
2/2
✓ Branch 0 taken 379 times.
✓ Branch 1 taken 3265 times.
 3644 opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG)
243 808 get_ue_golomb_31(gb);
244 }
245 }
246
247 18533 return 0;
248 }
249
250 /**
251 * Parse NAL units of found picture and decode some basic information.
252 *
253 * @param s parser context.
254 * @param avctx codec context.
255 * @param buf buffer with field/frame data.
256 * @param buf_size size of the buffer.
257 */
258 34106 static inline int parse_nal_units(AVCodecParserContext *s,
259 AVCodecContext *avctx,
260 const uint8_t * const buf, int buf_size)
261 {
262 34106 H264ParseContext *p = s->priv_data;
263 34106 H2645RBSP rbsp = { NULL };
264 34106 H2645NAL nal = { NULL };
265 int buf_index, next_avc;
266 unsigned int pps_id;
267 unsigned int slice_type;
268 34106 int state = -1, got_reset = 0;
269
3/4
✓ Branch 0 taken 33773 times.
✓ Branch 1 taken 333 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 33773 times.
 34106 int q264 = buf_size >=4 && !memcmp("Q264", buf, 4);
270 int field_poc[2];
271 int ret;
272
273 /* set some sane default values */
274 34106 s->pict_type = AV_PICTURE_TYPE_I;
275 34106 s->key_frame = 0;
276 34106 s->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
277
278 34106 ff_h264_sei_uninit(&p->sei);
279 34106 p->sei.common.frame_packing.arrangement_cancel_flag = -1;
280 34106 p->sei.common.unregistered.x264_build = -1;
281
282
2/2
✓ Branch 0 taken 333 times.
✓ Branch 1 taken 33773 times.
 34106 if (!buf_size)
283 333 return 0;
284
285 33773 av_fast_padded_malloc(&rbsp.rbsp_buffer, &rbsp.rbsp_buffer_alloc_size, buf_size);
286
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 33773 times.
 33773 if (!rbsp.rbsp_buffer)
287 ✗ return AVERROR(ENOMEM);
288
289 33773 buf_index = 0;
290
2/2
✓ Branch 0 taken 26949 times.
✓ Branch 1 taken 6824 times.
 33773 next_avc = p->is_avc ? 0 : buf_size;
291 16672 for (;;) {
292 const SPS *sps;
293 50445 int src_length, consumed, nalsize = 0;
294
295
2/2
✓ Branch 0 taken 10898 times.
✓ Branch 1 taken 39547 times.
 50445 if (buf_index >= next_avc) {
296 10898 nalsize = get_nalsize(p->nal_length_size, buf, buf_size, &buf_index, avctx);
297
2/2
✓ Branch 0 taken 332 times.
✓ Branch 1 taken 10566 times.
 10898 if (nalsize < 0)
298 332 break;
299 10566 next_avc = buf_index + nalsize;
300 } else {
301 39547 buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
302
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 39547 times.
 39547 if (buf_index >= buf_size)
303 ✗ break;
304
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 39547 times.
 39547 if (buf_index >= next_avc)
305 ✗ continue;
306 }
307 50113 src_length = next_avc - buf_index;
308
309 50113 state = buf[buf_index];
310
2/2
✓ Branch 0 taken 33441 times.
✓ Branch 1 taken 16672 times.
 50113 switch (state & 0x1f) {
311 33441 case H264_NAL_SLICE:
312 case H264_NAL_IDR_SLICE:
313 // Do not walk the whole buffer just to decode slice header
314
4/4
✓ Branch 0 taken 32573 times.
✓ Branch 1 taken 868 times.
✓ Branch 2 taken 11350 times.
✓ Branch 3 taken 21223 times.
 33441 if ((state & 0x1f) == H264_NAL_IDR_SLICE || ((state >> 5) & 0x3) == 0) {
315 /* IDR or disposable slice
316 * No need to decode many bytes because MMCOs shall not be present. */
317
2/2
✓ Branch 0 taken 11814 times.
✓ Branch 1 taken 404 times.
 12218 if (src_length > 60)
318 11814 src_length = 60;
319 } else {
320 /* To decode up to MMCOs */
321
2/2
✓ Branch 0 taken 11913 times.
✓ Branch 1 taken 9310 times.
 21223 if (src_length > 1000)
322 11913 src_length = 1000;
323 }
324 33441 break;
325 }
326 50113 consumed = ff_h2645_extract_rbsp(buf + buf_index, src_length, &rbsp, &nal, 1);
327
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 50113 times.
 50113 if (consumed < 0)
328 ✗ break;
329
330 50113 buf_index += consumed;
331
332 50113 ret = init_get_bits8(&nal.gb, nal.data, nal.size);
333
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 50113 times.
 50113 if (ret < 0)
334 ✗ goto fail;
335 50113 get_bits1(&nal.gb);
336 50113 nal.ref_idc = get_bits(&nal.gb, 2);
337 50113 nal.type = get_bits(&nal.gb, 5);
338
339
6/6
✓ Branch 0 taken 932 times.
✓ Branch 1 taken 7635 times.
✓ Branch 2 taken 4230 times.
✓ Branch 3 taken 868 times.
✓ Branch 4 taken 32573 times.
✓ Branch 5 taken 3875 times.
 50113 switch (nal.type) {
340 932 case H264_NAL_SPS:
341 932 ff_h264_decode_seq_parameter_set(&nal.gb, avctx, &p->ps, 0);
342 932 break;
343 7635 case H264_NAL_PPS:
344 7635 ff_h264_decode_picture_parameter_set(&nal.gb, avctx, &p->ps,
345 nal.size_bits);
346 7635 break;
347 4230 case H264_NAL_SEI:
348 4230 ff_h264_sei_decode(&p->sei, &nal.gb, &p->ps, avctx);
349 4230 break;
350 868 case H264_NAL_IDR_SLICE:
351 868 s->key_frame = 1;
352
353 868 p->poc.prev_frame_num = 0;
354 868 p->poc.prev_frame_num_offset = 0;
355 868 p->poc.prev_poc_msb =
356 868 p->poc.prev_poc_lsb = 0;
357 /* fall through */
358 33441 case H264_NAL_SLICE:
359 33441 get_ue_golomb_long(&nal.gb); // skip first_mb_in_slice
360 33441 slice_type = get_ue_golomb_31(&nal.gb);
361 33441 s->pict_type = ff_h264_golomb_to_pict_type[slice_type % 5];
362
2/2
✓ Branch 0 taken 205 times.
✓ Branch 1 taken 33236 times.
 33441 if (p->sei.recovery_point.recovery_frame_cnt >= 0) {
363 /* key frame, since recovery_frame_cnt is set */
364 205 s->key_frame = 1;
365 }
366 33441 pps_id = get_ue_golomb(&nal.gb);
367
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 33441 times.
 33441 if (pps_id >= MAX_PPS_COUNT) {
368 ✗ av_log(avctx, AV_LOG_ERROR,
369 "pps_id %u out of range\n", pps_id);
370 ✗ goto fail;
371 }
372
2/2
✓ Branch 0 taken 568 times.
✓ Branch 1 taken 32873 times.
 33441 if (!p->ps.pps_list[pps_id]) {
373 568 av_log(avctx, AV_LOG_ERROR,
374 "non-existing PPS %u referenced\n", pps_id);
375 568 goto fail;
376 }
377
378 32873 av_refstruct_replace(&p->ps.pps, p->ps.pps_list[pps_id]);
379 32873 p->ps.sps = p->ps.pps->sps;
380 32873 sps = p->ps.sps;
381
382 // heuristic to detect non marked keyframes
383
6/6
✓ Branch 0 taken 8643 times.
✓ Branch 1 taken 24230 times.
✓ Branch 2 taken 8509 times.
✓ Branch 3 taken 134 times.
✓ Branch 4 taken 1029 times.
✓ Branch 5 taken 7480 times.
 32873 if (p->ps.sps->ref_frame_count <= 1 && p->ps.pps->ref_count[0] <= 1 && s->pict_type == AV_PICTURE_TYPE_I)
384 1029 s->key_frame = 1;
385
386 32873 p->poc.frame_num = get_bits(&nal.gb, sps->log2_max_frame_num);
387
388 32873 s->coded_width = 16 * sps->mb_width;
389 32873 s->coded_height = 16 * sps->mb_height;
390 32873 s->width = s->coded_width - (sps->crop_right + sps->crop_left);
391 32873 s->height = s->coded_height - (sps->crop_top + sps->crop_bottom);
392
2/4
✓ Branch 0 taken 32873 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 32873 times.
 32873 if (s->width <= 0 || s->height <= 0) {
393 ✗ s->width = s->coded_width;
394 ✗ s->height = s->coded_height;
395 }
396
397
3/4
✓ Branch 0 taken 150 times.
✓ Branch 1 taken 285 times.
✓ Branch 2 taken 32438 times.
✗ Branch 3 not taken.
 32873 switch (sps->bit_depth_luma) {
398 150 case 9:
399
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 150 times.
 150 if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P9;
400
2/2
✓ Branch 0 taken 50 times.
✓ Branch 1 taken 100 times.
 150 else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P9;
401 100 else s->format = AV_PIX_FMT_YUV420P9;
402 150 break;
403 285 case 10:
404
2/2
✓ Branch 0 taken 50 times.
✓ Branch 1 taken 235 times.
 285 if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P10;
405
2/2
✓ Branch 0 taken 87 times.
✓ Branch 1 taken 148 times.
 235 else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P10;
406 148 else s->format = AV_PIX_FMT_YUV420P10;
407 285 break;
408 32438 case 8:
409
2/2
✓ Branch 0 taken 889 times.
✓ Branch 1 taken 31549 times.
 32438 if (sps->chroma_format_idc == 3) s->format = AV_PIX_FMT_YUV444P;
410
2/2
✓ Branch 0 taken 10 times.
✓ Branch 1 taken 31539 times.
 31549 else if (sps->chroma_format_idc == 2) s->format = AV_PIX_FMT_YUV422P;
411 31539 else s->format = AV_PIX_FMT_YUV420P;
412 32438 break;
413 ✗ default:
414 ✗ s->format = AV_PIX_FMT_NONE;
415 }
416
417 32873 avctx->profile = ff_h264_get_profile(sps);
418 32873 avctx->level = sps->level_idc;
419
420
2/2
✓ Branch 0 taken 23425 times.
✓ Branch 1 taken 9448 times.
 32873 if (sps->frame_mbs_only_flag) {
421 23425 p->picture_structure = PICT_FRAME;
422 } else {
423
2/2
✓ Branch 1 taken 6487 times.
✓ Branch 2 taken 2961 times.
 9448 if (get_bits1(&nal.gb)) { // field_pic_flag
424 6487 p->picture_structure = PICT_TOP_FIELD + get_bits1(&nal.gb); // bottom_field_flag
425 } else {
426 2961 p->picture_structure = PICT_FRAME;
427 }
428 }
429
430
2/2
✓ Branch 0 taken 866 times.
✓ Branch 1 taken 32007 times.
 32873 if (nal.type == H264_NAL_IDR_SLICE)
431 866 get_ue_golomb_long(&nal.gb); /* idr_pic_id */
432
2/2
✓ Branch 0 taken 24929 times.
✓ Branch 1 taken 7944 times.
 32873 if (sps->poc_type == 0) {
433 24929 p->poc.poc_lsb = get_bits(&nal.gb, sps->log2_max_poc_lsb);
434
435
2/2
✓ Branch 0 taken 4228 times.
✓ Branch 1 taken 20701 times.
 24929 if (p->ps.pps->pic_order_present == 1 &&
436
2/2
✓ Branch 0 taken 3273 times.
✓ Branch 1 taken 955 times.
 4228 p->picture_structure == PICT_FRAME)
437 3273 p->poc.delta_poc_bottom = get_se_golomb(&nal.gb);
438 }
439
440
2/2
✓ Branch 0 taken 3245 times.
✓ Branch 1 taken 29628 times.
 32873 if (sps->poc_type == 1 &&
441
2/2
✓ Branch 0 taken 3071 times.
✓ Branch 1 taken 174 times.
 3245 !sps->delta_pic_order_always_zero_flag) {
442 3071 p->poc.delta_poc[0] = get_se_golomb(&nal.gb);
443
444
2/2
✓ Branch 0 taken 692 times.
✓ Branch 1 taken 2379 times.
 3071 if (p->ps.pps->pic_order_present == 1 &&
445
2/2
✓ Branch 0 taken 406 times.
✓ Branch 1 taken 286 times.
 692 p->picture_structure == PICT_FRAME)
446 406 p->poc.delta_poc[1] = get_se_golomb(&nal.gb);
447 }
448
449 /* Decode POC of this picture.
450 * The prev_ values needed for decoding POC of the next picture are not set here. */
451 32873 field_poc[0] = field_poc[1] = INT_MAX;
452 32873 ret = ff_h264_init_poc(field_poc, &s->output_picture_number, sps,
453 &p->poc, p->picture_structure, nal.ref_idc);
454
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 32873 times.
 32873 if (ret < 0)
455 ✗ goto fail;
456
457 /* Continue parsing to check if MMCO_RESET is present.
458 * FIXME: MMCO_RESET could appear in non-first slice.
459 * Maybe, we should parse all undisposable non-IDR slice of this
460 * picture until encountering MMCO_RESET in a slice of it. */
461
4/4
✓ Branch 0 taken 21547 times.
✓ Branch 1 taken 11326 times.
✓ Branch 2 taken 20681 times.
✓ Branch 3 taken 866 times.
 32873 if (nal.ref_idc && nal.type != H264_NAL_IDR_SLICE) {
462 20681 got_reset = scan_mmco_reset(s, &nal.gb, avctx);
463
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 20681 times.
 20681 if (got_reset < 0)
464 ✗ goto fail;
465 }
466
467 /* Set up the prev_ values for decoding POC of the next picture. */
468
2/2
✓ Branch 0 taken 32823 times.
✓ Branch 1 taken 50 times.
 32873 p->poc.prev_frame_num = got_reset ? 0 : p->poc.frame_num;
469
2/2
✓ Branch 0 taken 32823 times.
✓ Branch 1 taken 50 times.
 32873 p->poc.prev_frame_num_offset = got_reset ? 0 : p->poc.frame_num_offset;
470
2/2
✓ Branch 0 taken 21547 times.
✓ Branch 1 taken 11326 times.
 32873 if (nal.ref_idc != 0) {
471
2/2
✓ Branch 0 taken 21497 times.
✓ Branch 1 taken 50 times.
 21547 if (!got_reset) {
472 21497 p->poc.prev_poc_msb = p->poc.poc_msb;
473 21497 p->poc.prev_poc_lsb = p->poc.poc_lsb;
474 } else {
475 50 p->poc.prev_poc_msb = 0;
476 50 p->poc.prev_poc_lsb =
477
1/2
✓ Branch 0 taken 50 times.
✗ Branch 1 not taken.
 50 p->picture_structure == PICT_BOTTOM_FIELD ? 0 : field_poc[0];
478 }
479 }
480
481
2/2
✓ Branch 0 taken 2989 times.
✓ Branch 1 taken 29884 times.
 32873 if (p->sei.picture_timing.present) {
482 2989 ret = ff_h264_sei_process_picture_timing(&p->sei.picture_timing,
483 sps, avctx);
484
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2989 times.
 2989 if (ret < 0) {
485 ✗ av_log(avctx, AV_LOG_ERROR, "Error processing the picture timing SEI\n");
486 ✗ p->sei.picture_timing.present = 0;
487 }
488 }
489
490
4/4
✓ Branch 0 taken 3385 times.
✓ Branch 1 taken 29488 times.
✓ Branch 2 taken 2977 times.
✓ Branch 3 taken 408 times.
 32873 if (sps->pic_struct_present_flag && p->sei.picture_timing.present) {
491
3/6
✓ Branch 0 taken 831 times.
✓ Branch 1 taken 2008 times.
✓ Branch 2 taken 138 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 2977 switch (p->sei.picture_timing.pic_struct) {
492 831 case H264_SEI_PIC_STRUCT_TOP_FIELD:
493 case H264_SEI_PIC_STRUCT_BOTTOM_FIELD:
494 831 s->repeat_pict = 0;
495 831 break;
496 2008 case H264_SEI_PIC_STRUCT_FRAME:
497 case H264_SEI_PIC_STRUCT_TOP_BOTTOM:
498 case H264_SEI_PIC_STRUCT_BOTTOM_TOP:
499 2008 s->repeat_pict = 1;
500 2008 break;
501 138 case H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
502 case H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
503 138 s->repeat_pict = 2;
504 138 break;
505 ✗ case H264_SEI_PIC_STRUCT_FRAME_DOUBLING:
506 ✗ s->repeat_pict = 3;
507 ✗ break;
508 ✗ case H264_SEI_PIC_STRUCT_FRAME_TRIPLING:
509 ✗ s->repeat_pict = 5;
510 ✗ break;
511 ✗ default:
512 ✗ s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
513 ✗ break;
514 }
515 } else {
516 29896 s->repeat_pict = p->picture_structure == PICT_FRAME ? 1 : 0;
517 }
518
519
2/2
✓ Branch 0 taken 26386 times.
✓ Branch 1 taken 6487 times.
 32873 if (p->picture_structure == PICT_FRAME) {
520 26386 s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
521
4/4
✓ Branch 0 taken 2225 times.
✓ Branch 1 taken 24161 times.
✓ Branch 2 taken 2146 times.
✓ Branch 3 taken 79 times.
 26386 if (sps->pic_struct_present_flag && p->sei.picture_timing.present) {
522
3/3
✓ Branch 0 taken 1421 times.
✓ Branch 1 taken 150 times.
✓ Branch 2 taken 575 times.
 2146 switch (p->sei.picture_timing.pic_struct) {
523 1421 case H264_SEI_PIC_STRUCT_TOP_BOTTOM:
524 case H264_SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
525 1421 s->field_order = AV_FIELD_TT;
526 1421 break;
527 150 case H264_SEI_PIC_STRUCT_BOTTOM_TOP:
528 case H264_SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
529 150 s->field_order = AV_FIELD_BB;
530 150 break;
531 575 default:
532 575 s->field_order = AV_FIELD_PROGRESSIVE;
533 575 break;
534 }
535 } else {
536
2/2
✓ Branch 0 taken 1041 times.
✓ Branch 1 taken 23199 times.
 24240 if (field_poc[0] < field_poc[1])
537 1041 s->field_order = AV_FIELD_TT;
538
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 23196 times.
 23199 else if (field_poc[0] > field_poc[1])
539 3 s->field_order = AV_FIELD_BB;
540 else
541 23196 s->field_order = AV_FIELD_PROGRESSIVE;
542 }
543 } else {
544
2/2
✓ Branch 0 taken 3341 times.
✓ Branch 1 taken 3146 times.
 6487 if (p->picture_structure == PICT_TOP_FIELD)
545 3341 s->picture_structure = AV_PICTURE_STRUCTURE_TOP_FIELD;
546 else
547 3146 s->picture_structure = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
548
2/2
✓ Branch 0 taken 4884 times.
✓ Branch 1 taken 1603 times.
 6487 if (p->poc.frame_num == p->last_frame_num &&
549
1/2
✓ Branch 0 taken 4884 times.
✗ Branch 1 not taken.
 4884 p->last_picture_structure != AV_PICTURE_STRUCTURE_UNKNOWN &&
550
1/2
✓ Branch 0 taken 4884 times.
✗ Branch 1 not taken.
 4884 p->last_picture_structure != AV_PICTURE_STRUCTURE_FRAME &&
551
2/2
✓ Branch 0 taken 4760 times.
✓ Branch 1 taken 124 times.
 4884 p->last_picture_structure != s->picture_structure) {
552
2/2
✓ Branch 0 taken 3140 times.
✓ Branch 1 taken 1620 times.
 4760 if (p->last_picture_structure == AV_PICTURE_STRUCTURE_TOP_FIELD)
553 3140 s->field_order = AV_FIELD_TT;
554 else
555 1620 s->field_order = AV_FIELD_BB;
556 } else {
557 1727 s->field_order = AV_FIELD_UNKNOWN;
558 }
559 6487 p->last_picture_structure = s->picture_structure;
560 6487 p->last_frame_num = p->poc.frame_num;
561 }
562
2/2
✓ Branch 0 taken 9775 times.
✓ Branch 1 taken 23098 times.
 32873 if (sps->timing_info_present_flag) {
563 9775 int64_t den = sps->time_scale;
564
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 9775 times.
 9775 if (p->sei.common.unregistered.x264_build < 44U)
565 ✗ den *= 2;
566 9775 av_reduce(&avctx->framerate.den, &avctx->framerate.num,
567 9775 sps->num_units_in_tick * 2, den, 1 << 30);
568 }
569
570 32873 av_freep(&rbsp.rbsp_buffer);
571 32873 return 0; /* no need to evaluate the rest */
572 }
573 }
574
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 332 times.
 332 if (q264) {
575 ✗ av_freep(&rbsp.rbsp_buffer);
576 ✗ return 0;
577 }
578 /* didn't find a picture! */
579 332 av_log(avctx, AV_LOG_ERROR, "missing picture in access unit with size %d\n", buf_size);
580 900 fail:
581 900 av_freep(&rbsp.rbsp_buffer);
582 900 return -1;
583 }
584
585 193313 static int h264_parse(AVCodecParserContext *s,
586 AVCodecContext *avctx,
587 const uint8_t **poutbuf, int *poutbuf_size,
588 const uint8_t *buf, int buf_size)
589 {
590 193313 H264ParseContext *p = s->priv_data;
591 193313 ParseContext *pc = &p->pc;
592 193313 AVRational time_base = { 0, 1 };
593 int next;
594
595
2/2
✓ Branch 0 taken 448 times.
✓ Branch 1 taken 192865 times.
 193313 if (!p->got_first) {
596 448 p->got_first = 1;
597
2/2
✓ Branch 0 taken 216 times.
✓ Branch 1 taken 232 times.
 448 if (avctx->extradata_size) {
598 216 ff_h264_decode_extradata(avctx->extradata, avctx->extradata_size,
599 &p->ps, &p->is_avc, &p->nal_length_size,
600 avctx->err_recognition, avctx);
601 }
602 }
603
604
2/2
✓ Branch 0 taken 7009 times.
✓ Branch 1 taken 186304 times.
 193313 if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
605 7009 next = buf_size;
606 } else {
607 186304 next = h264_find_frame_end(p, buf, buf_size, avctx);
608
609
2/2
✓ Branch 1 taken 159207 times.
✓ Branch 2 taken 27097 times.
 186304 if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
610 159207 *poutbuf = NULL;
611 159207 *poutbuf_size = 0;
612 159207 return buf_size;
613 }
614
615
4/4
✓ Branch 0 taken 588 times.
✓ Branch 1 taken 26509 times.
✓ Branch 2 taken 120 times.
✓ Branch 3 taken 468 times.
 27097 if (next < 0 && next != END_NOT_FOUND) {
616 av_assert1(pc->last_index + next >= 0);
617 120 h264_find_frame_end(p, &pc->buffer[pc->last_index + next], -next, avctx); // update state
618 }
619 }
620
621 34106 parse_nal_units(s, avctx, buf, buf_size);
622
623
2/2
✓ Branch 0 taken 10215 times.
✓ Branch 1 taken 23891 times.
 34106 if (avctx->framerate.num)
624 10215 time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){2, 1}));
625
2/2
✓ Branch 0 taken 1957 times.
✓ Branch 1 taken 32149 times.
 34106 if (p->sei.picture_timing.cpb_removal_delay >= 0) {
626 1957 s->dts_sync_point = p->sei.buffering_period.present;
627 1957 s->dts_ref_dts_delta = p->sei.picture_timing.cpb_removal_delay;
628 1957 s->pts_dts_delta = p->sei.picture_timing.dpb_output_delay;
629 } else {
630 32149 s->dts_sync_point = INT_MIN;
631 32149 s->dts_ref_dts_delta = INT_MIN;
632 32149 s->pts_dts_delta = INT_MIN;
633 }
634
635
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 34106 times.
 34106 if (s->flags & PARSER_FLAG_ONCE) {
636 ✗ s->flags &= PARSER_FLAG_COMPLETE_FRAMES;
637 }
638
639
2/2
✓ Branch 0 taken 1957 times.
✓ Branch 1 taken 32149 times.
 34106 if (s->dts_sync_point >= 0) {
640 1957 int64_t den = time_base.den * (int64_t)avctx->pkt_timebase.num;
641
1/2
✓ Branch 0 taken 1957 times.
✗ Branch 1 not taken.
 1957 if (den > 0) {
642 1957 int64_t num = time_base.num * (int64_t)avctx->pkt_timebase.den;
643
2/2
✓ Branch 0 taken 1555 times.
✓ Branch 1 taken 402 times.
 1957 if (s->dts != AV_NOPTS_VALUE) {
644 // got DTS from the stream, update reference timestamp
645 1555 p->reference_dts = av_sat_sub64(s->dts, av_rescale(s->dts_ref_dts_delta, num, den));
646
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 402 times.
 402 } else if (p->reference_dts != AV_NOPTS_VALUE) {
647 // compute DTS based on reference timestamp
648 ✗ s->dts = av_sat_add64(p->reference_dts, av_rescale(s->dts_ref_dts_delta, num, den));
649 }
650
651
3/4
✓ Branch 0 taken 1555 times.
✓ Branch 1 taken 402 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 1555 times.
 1957 if (p->reference_dts != AV_NOPTS_VALUE && s->pts == AV_NOPTS_VALUE)
652 ✗ s->pts = s->dts + av_rescale(s->pts_dts_delta, num, den);
653
654
2/2
✓ Branch 0 taken 135 times.
✓ Branch 1 taken 1822 times.
 1957 if (s->dts_sync_point > 0)
655 135 p->reference_dts = s->dts; // new reference
656 }
657 }
658
659 34106 *poutbuf = buf;
660 34106 *poutbuf_size = buf_size;
661 34106 return next;
662 }
663
664 451 static av_cold void h264_close(AVCodecParserContext *s)
665 {
666 451 H264ParseContext *p = s->priv_data;
667 451 ParseContext *pc = &p->pc;
668
669 451 av_freep(&pc->buffer);
670
671 451 ff_h264_sei_uninit(&p->sei);
672 451 ff_h264_ps_uninit(&p->ps);
673 451 }
674
675 451 static av_cold int init(AVCodecParserContext *s)
676 {
677 451 H264ParseContext *p = s->priv_data;
678
679 451 p->reference_dts = AV_NOPTS_VALUE;
680 451 p->last_frame_num = INT_MAX;
681 451 ff_h264dsp_init(&p->h264dsp, 8, 1);
682 451 return 0;
683 }
684
685 const AVCodecParser ff_h264_parser = {
686 .codec_ids = { AV_CODEC_ID_H264 },
687 .priv_data_size = sizeof(H264ParseContext),
688 .parser_init = init,
689 .parser_parse = h264_parse,
690 .parser_close = h264_close,
691 };
692