FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/h264_parse.c
Date: 2025-05-15 14:57:22
Exec Total Coverage
Lines: 219 295 74.2%
Functions: 9 9 100.0%
Branches: 153 202 75.7%
Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "libavutil/mem.h"
20 #include "bytestream.h"
21 #include "get_bits.h"
22 #include "golomb.h"
23 #include "h264.h"
24 #include "h264pred.h"
25 #include "h264_parse.h"
26 #include "h264_ps.h"
27 #include "h2645_parse.h"
28 #include "mpegutils.h"
29
30 6532 int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps,
31 const int *ref_count, int slice_type_nos,
32 H264PredWeightTable *pwt,
33 int picture_structure, void *logctx)
34 {
35 int list, i, j;
36 int luma_def, chroma_def;
37
38 6532 pwt->use_weight = 0;
39 6532 pwt->use_weight_chroma = 0;
40
41 6532 pwt->luma_log2_weight_denom = get_ue_golomb_31(gb);
42
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6532 times.
 6532 if (pwt->luma_log2_weight_denom > 7U) {
43 ✗ av_log(logctx, AV_LOG_ERROR, "luma_log2_weight_denom %d is out of range\n", pwt->luma_log2_weight_denom);
44 ✗ pwt->luma_log2_weight_denom = 0;
45 }
46 6532 luma_def = 1 << pwt->luma_log2_weight_denom;
47
48
1/2
✓ Branch 0 taken 6532 times.
✗ Branch 1 not taken.
 6532 if (sps->chroma_format_idc) {
49 6532 pwt->chroma_log2_weight_denom = get_ue_golomb_31(gb);
50
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6532 times.
 6532 if (pwt->chroma_log2_weight_denom > 7U) {
51 ✗ av_log(logctx, AV_LOG_ERROR, "chroma_log2_weight_denom %d is out of range\n", pwt->chroma_log2_weight_denom);
52 ✗ pwt->chroma_log2_weight_denom = 0;
53 }
54 6532 chroma_def = 1 << pwt->chroma_log2_weight_denom;
55 }
56
57
2/2
✓ Branch 0 taken 6942 times.
✓ Branch 1 taken 410 times.
 7352 for (list = 0; list < 2; list++) {
58 6942 pwt->luma_weight_flag[list] = 0;
59 6942 pwt->chroma_weight_flag[list] = 0;
60
2/2
✓ Branch 0 taken 21349 times.
✓ Branch 1 taken 6942 times.
 28291 for (i = 0; i < ref_count[list]; i++) {
61 int luma_weight_flag, chroma_weight_flag;
62
63 21349 luma_weight_flag = get_bits1(gb);
64
2/2
✓ Branch 0 taken 6826 times.
✓ Branch 1 taken 14523 times.
 21349 if (luma_weight_flag) {
65 6826 pwt->luma_weight[i][list][0] = get_se_golomb(gb);
66 6826 pwt->luma_weight[i][list][1] = get_se_golomb(gb);
67
1/2
✓ Branch 0 taken 6826 times.
✗ Branch 1 not taken.
 6826 if ((int8_t)pwt->luma_weight[i][list][0] != pwt->luma_weight[i][list][0] ||
68
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6826 times.
 6826 (int8_t)pwt->luma_weight[i][list][1] != pwt->luma_weight[i][list][1])
69 ✗ goto out_range_weight;
70
2/2
✓ Branch 0 taken 2530 times.
✓ Branch 1 taken 4296 times.
 6826 if (pwt->luma_weight[i][list][0] != luma_def ||
71
2/2
✓ Branch 0 taken 1750 times.
✓ Branch 1 taken 780 times.
 2530 pwt->luma_weight[i][list][1] != 0) {
72 6046 pwt->use_weight = 1;
73 6046 pwt->luma_weight_flag[list] = 1;
74 }
75 } else {
76 14523 pwt->luma_weight[i][list][0] = luma_def;
77 14523 pwt->luma_weight[i][list][1] = 0;
78 }
79
80
1/2
✓ Branch 0 taken 21349 times.
✗ Branch 1 not taken.
 21349 if (sps->chroma_format_idc) {
81 21349 chroma_weight_flag = get_bits1(gb);
82
2/2
✓ Branch 0 taken 2899 times.
✓ Branch 1 taken 18450 times.
 21349 if (chroma_weight_flag) {
83 int j;
84
2/2
✓ Branch 0 taken 5798 times.
✓ Branch 1 taken 2899 times.
 8697 for (j = 0; j < 2; j++) {
85 5798 pwt->chroma_weight[i][list][j][0] = get_se_golomb(gb);
86 5798 pwt->chroma_weight[i][list][j][1] = get_se_golomb(gb);
87
1/2
✓ Branch 0 taken 5798 times.
✗ Branch 1 not taken.
 5798 if ((int8_t)pwt->chroma_weight[i][list][j][0] != pwt->chroma_weight[i][list][j][0] ||
88
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5798 times.
 5798 (int8_t)pwt->chroma_weight[i][list][j][1] != pwt->chroma_weight[i][list][j][1]) {
89 ✗ pwt->chroma_weight[i][list][j][0] = chroma_def;
90 ✗ pwt->chroma_weight[i][list][j][1] = 0;
91 ✗ goto out_range_weight;
92 }
93
2/2
✓ Branch 0 taken 629 times.
✓ Branch 1 taken 5169 times.
 5798 if (pwt->chroma_weight[i][list][j][0] != chroma_def ||
94
2/2
✓ Branch 0 taken 582 times.
✓ Branch 1 taken 47 times.
 629 pwt->chroma_weight[i][list][j][1] != 0) {
95 5751 pwt->use_weight_chroma = 1;
96 5751 pwt->chroma_weight_flag[list] = 1;
97 }
98 }
99 } else {
100 int j;
101
2/2
✓ Branch 0 taken 36900 times.
✓ Branch 1 taken 18450 times.
 55350 for (j = 0; j < 2; j++) {
102 36900 pwt->chroma_weight[i][list][j][0] = chroma_def;
103 36900 pwt->chroma_weight[i][list][j][1] = 0;
104 }
105 }
106 }
107
108 // for MBAFF
109
2/2
✓ Branch 0 taken 19143 times.
✓ Branch 1 taken 2206 times.
 21349 if (picture_structure == PICT_FRAME) {
110 19143 pwt->luma_weight[16 + 2 * i][list][0] = pwt->luma_weight[16 + 2 * i + 1][list][0] = pwt->luma_weight[i][list][0];
111 19143 pwt->luma_weight[16 + 2 * i][list][1] = pwt->luma_weight[16 + 2 * i + 1][list][1] = pwt->luma_weight[i][list][1];
112
1/2
✓ Branch 0 taken 19143 times.
✗ Branch 1 not taken.
 19143 if (sps->chroma_format_idc) {
113
2/2
✓ Branch 0 taken 38286 times.
✓ Branch 1 taken 19143 times.
 57429 for (j = 0; j < 2; j++) {
114 38286 pwt->chroma_weight[16 + 2 * i][list][j][0] = pwt->chroma_weight[16 + 2 * i + 1][list][j][0] = pwt->chroma_weight[i][list][j][0];
115 38286 pwt->chroma_weight[16 + 2 * i][list][j][1] = pwt->chroma_weight[16 + 2 * i + 1][list][j][1] = pwt->chroma_weight[i][list][j][1];
116 }
117 }
118 }
119 }
120
2/2
✓ Branch 0 taken 6122 times.
✓ Branch 1 taken 820 times.
 6942 if (slice_type_nos != AV_PICTURE_TYPE_B)
121 6122 break;
122 }
123
4/4
✓ Branch 0 taken 3364 times.
✓ Branch 1 taken 3168 times.
✓ Branch 2 taken 5 times.
✓ Branch 3 taken 3359 times.
 6532 pwt->use_weight = pwt->use_weight || pwt->use_weight_chroma;
124 6532 return 0;
125 ✗ out_range_weight:
126 ✗ avpriv_request_sample(logctx, "Out of range weight");
127 ✗ return AVERROR_INVALIDDATA;
128 }
129
130 /**
131 * Check if the top & left blocks are available if needed and
132 * change the dc mode so it only uses the available blocks.
133 */
134 3112362 int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx,
135 int top_samples_available, int left_samples_available)
136 {
137 static const int8_t top[12] = {
138 -1, 0, LEFT_DC_PRED, -1, -1, -1, -1, -1, 0
139 };
140 static const int8_t left[12] = {
141 0, -1, TOP_DC_PRED, 0, -1, -1, -1, 0, -1, DC_128_PRED
142 };
143 int i;
144
145
2/2
✓ Branch 0 taken 214686 times.
✓ Branch 1 taken 2897676 times.
 3112362 if (!(top_samples_available & 0x8000)) {
146
2/2
✓ Branch 0 taken 858744 times.
✓ Branch 1 taken 214686 times.
 1073430 for (i = 0; i < 4; i++) {
147 858744 int status = top[pred_mode_cache[scan8[0] + i]];
148
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 858744 times.
 858744 if (status < 0) {
149 ✗ av_log(logctx, AV_LOG_ERROR,
150 "top block unavailable for requested intra mode %d\n",
151 status);
152 ✗ return AVERROR_INVALIDDATA;
153
2/2
✓ Branch 0 taken 556191 times.
✓ Branch 1 taken 302553 times.
 858744 } else if (status) {
154 556191 pred_mode_cache[scan8[0] + i] = status;
155 }
156 }
157 }
158
159
2/2
✓ Branch 0 taken 68322 times.
✓ Branch 1 taken 3044040 times.
 3112362 if ((left_samples_available & 0x8888) != 0x8888) {
160 static const int mask[4] = { 0x8000, 0x2000, 0x80, 0x20 };
161
2/2
✓ Branch 0 taken 273288 times.
✓ Branch 1 taken 68322 times.
 341610 for (i = 0; i < 4; i++)
162
2/2
✓ Branch 0 taken 273234 times.
✓ Branch 1 taken 54 times.
 273288 if (!(left_samples_available & mask[i])) {
163 273234 int status = left[pred_mode_cache[scan8[0] + 8 * i]];
164
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 273234 times.
 273234 if (status < 0) {
165 ✗ av_log(logctx, AV_LOG_ERROR,
166 "left block unavailable for requested intra4x4 mode %d\n",
167 status);
168 ✗ return AVERROR_INVALIDDATA;
169
2/2
✓ Branch 0 taken 100867 times.
✓ Branch 1 taken 172367 times.
 273234 } else if (status) {
170 100867 pred_mode_cache[scan8[0] + 8 * i] = status;
171 }
172 }
173 }
174
175 3112362 return 0;
176 }
177
178 /**
179 * Check if the top & left blocks are available if needed and
180 * change the dc mode so it only uses the available blocks.
181 */
182 5099710 int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available,
183 int left_samples_available,
184 int mode, int is_chroma)
185 {
186 static const int8_t top[4] = { LEFT_DC_PRED8x8, 1, -1, -1 };
187 static const int8_t left[5] = { TOP_DC_PRED8x8, -1, 2, -1, DC_128_PRED8x8 };
188
189
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5099710 times.
 5099710 if (mode > 3U) {
190 ✗ av_log(logctx, AV_LOG_ERROR,
191 "out of range intra chroma pred mode\n");
192 ✗ return AVERROR_INVALIDDATA;
193 }
194
195
2/2
✓ Branch 0 taken 389371 times.
✓ Branch 1 taken 4710339 times.
 5099710 if (!(top_samples_available & 0x8000)) {
196 389371 mode = top[mode];
197
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 389371 times.
 389371 if (mode < 0) {
198 ✗ av_log(logctx, AV_LOG_ERROR,
199 "top block unavailable for requested intra mode\n");
200 ✗ return AVERROR_INVALIDDATA;
201 }
202 }
203
204
2/2
✓ Branch 0 taken 107501 times.
✓ Branch 1 taken 4992209 times.
 5099710 if ((left_samples_available & 0x8080) != 0x8080) {
205 107501 mode = left[mode];
206
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 107501 times.
 107501 if (mode < 0) {
207 ✗ av_log(logctx, AV_LOG_ERROR,
208 "left block unavailable for requested intra mode\n");
209 ✗ return AVERROR_INVALIDDATA;
210 }
211
4/4
✓ Branch 0 taken 86757 times.
✓ Branch 1 taken 20744 times.
✓ Branch 2 taken 27 times.
✓ Branch 3 taken 86730 times.
 107501 if (is_chroma && (left_samples_available & 0x8080)) {
212 // mad cow disease mode, aka MBAFF + constrained_intra_pred
213 54 mode = ALZHEIMER_DC_L0T_PRED8x8 +
214
2/2
✓ Branch 0 taken 11 times.
✓ Branch 1 taken 16 times.
 27 (!(left_samples_available & 0x8000)) +
215
2/2
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 20 times.
 27 2 * (mode == DC_128_PRED8x8);
216 }
217 }
218
219 5099710 return mode;
220 }
221
222 58342 int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
223 GetBitContext *gb, const PPS *pps,
224 int slice_type_nos, int picture_structure, void *logctx)
225 {
226 int list_count;
227 int num_ref_idx_active_override_flag;
228
229 // set defaults, might be overridden a few lines later
230 58342 ref_count[0] = pps->ref_count[0];
231 58342 ref_count[1] = pps->ref_count[1];
232
233
2/2
✓ Branch 0 taken 52037 times.
✓ Branch 1 taken 6305 times.
 58342 if (slice_type_nos != AV_PICTURE_TYPE_I) {
234 unsigned max[2];
235
2/2
✓ Branch 0 taken 40684 times.
✓ Branch 1 taken 11353 times.
 52037 max[0] = max[1] = picture_structure == PICT_FRAME ? 15 : 31;
236
237 52037 num_ref_idx_active_override_flag = get_bits1(gb);
238
239
2/2
✓ Branch 0 taken 22008 times.
✓ Branch 1 taken 30029 times.
 52037 if (num_ref_idx_active_override_flag) {
240 22008 ref_count[0] = get_ue_golomb(gb) + 1;
241
2/2
✓ Branch 0 taken 6826 times.
✓ Branch 1 taken 15182 times.
 22008 if (slice_type_nos == AV_PICTURE_TYPE_B) {
242 6826 ref_count[1] = get_ue_golomb(gb) + 1;
243 } else
244 // full range is spec-ok in this case, even for frames
245 15182 ref_count[1] = 1;
246 }
247
248
2/2
✓ Branch 0 taken 14470 times.
✓ Branch 1 taken 37567 times.
 52037 if (slice_type_nos == AV_PICTURE_TYPE_B)
249 14470 list_count = 2;
250 else
251 37567 list_count = 1;
252
253
4/6
✓ Branch 0 taken 52037 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 14470 times.
✓ Branch 3 taken 37567 times.
✗ Branch 4 not taken.
✓ Branch 5 taken 14470 times.
 52037 if (ref_count[0] - 1 > max[0] || (list_count == 2 && (ref_count[1] - 1 > max[1]))) {
254 ✗ av_log(logctx, AV_LOG_ERROR, "reference overflow %u > %u or %u > %u\n",
255 ✗ ref_count[0] - 1, max[0], ref_count[1] - 1, max[1]);
256 ✗ ref_count[0] = ref_count[1] = 0;
257 ✗ *plist_count = 0;
258 ✗ goto fail;
259
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 52037 times.
 52037 } else if (ref_count[1] - 1 > max[1]) {
260 ✗ av_log(logctx, AV_LOG_DEBUG, "reference overflow %u > %u \n",
261 ✗ ref_count[1] - 1, max[1]);
262 ✗ ref_count[1] = 0;
263 }
264
265 } else {
266 6305 list_count = 0;
267 6305 ref_count[0] = ref_count[1] = 0;
268 }
269
270 58342 *plist_count = list_count;
271
272 58342 return 0;
273 ✗ fail:
274 ✗ *plist_count = 0;
275 ✗ ref_count[0] = 0;
276 ✗ ref_count[1] = 0;
277 ✗ return AVERROR_INVALIDDATA;
278 }
279
280 61356 int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc,
281 const SPS *sps, H264POCContext *pc,
282 int picture_structure, int nal_ref_idc)
283 {
284 61356 const int max_frame_num = 1 << sps->log2_max_frame_num;
285 int64_t field_poc[2];
286
287 61356 pc->frame_num_offset = pc->prev_frame_num_offset;
288
2/2
✓ Branch 0 taken 488 times.
✓ Branch 1 taken 60868 times.
 61356 if (pc->frame_num < pc->prev_frame_num)
289 488 pc->frame_num_offset += max_frame_num;
290
291
2/2
✓ Branch 0 taken 46422 times.
✓ Branch 1 taken 14934 times.
 61356 if (sps->poc_type == 0) {
292 46422 const int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
293
2/2
✓ Branch 0 taken 815 times.
✓ Branch 1 taken 45607 times.
 46422 if (pc->prev_poc_lsb < 0)
294 815 pc->prev_poc_lsb = pc->poc_lsb;
295
296
2/2
✓ Branch 0 taken 21393 times.
✓ Branch 1 taken 25029 times.
 46422 if (pc->poc_lsb < pc->prev_poc_lsb &&
297
2/2
✓ Branch 0 taken 473 times.
✓ Branch 1 taken 20920 times.
 21393 pc->prev_poc_lsb - pc->poc_lsb >= max_poc_lsb / 2)
298 473 pc->poc_msb = pc->prev_poc_msb + max_poc_lsb;
299
2/2
✓ Branch 0 taken 22339 times.
✓ Branch 1 taken 23610 times.
 45949 else if (pc->poc_lsb > pc->prev_poc_lsb &&
300
2/2
✓ Branch 0 taken 338 times.
✓ Branch 1 taken 22001 times.
 22339 pc->prev_poc_lsb - pc->poc_lsb < -max_poc_lsb / 2)
301 338 pc->poc_msb = pc->prev_poc_msb - max_poc_lsb;
302 else
303 45611 pc->poc_msb = pc->prev_poc_msb;
304 46422 field_poc[0] =
305 46422 field_poc[1] = pc->poc_msb + pc->poc_lsb;
306
2/2
✓ Branch 0 taken 33969 times.
✓ Branch 1 taken 12453 times.
 46422 if (picture_structure == PICT_FRAME)
307 33969 field_poc[1] += pc->delta_poc_bottom;
308
2/2
✓ Branch 0 taken 6173 times.
✓ Branch 1 taken 8761 times.
 14934 } else if (sps->poc_type == 1) {
309 int abs_frame_num;
310 int64_t expected_delta_per_poc_cycle, expectedpoc;
311 int i;
312
313
1/2
✓ Branch 0 taken 6173 times.
✗ Branch 1 not taken.
 6173 if (sps->poc_cycle_length != 0)
314 6173 abs_frame_num = pc->frame_num_offset + pc->frame_num;
315 else
316 ✗ abs_frame_num = 0;
317
318
3/4
✓ Branch 0 taken 397 times.
✓ Branch 1 taken 5776 times.
✓ Branch 2 taken 397 times.
✗ Branch 3 not taken.
 6173 if (nal_ref_idc == 0 && abs_frame_num > 0)
319 397 abs_frame_num--;
320
321 6173 expected_delta_per_poc_cycle = 0;
322
2/2
✓ Branch 0 taken 10007 times.
✓ Branch 1 taken 6173 times.
 16180 for (i = 0; i < sps->poc_cycle_length; i++)
323 // FIXME integrate during sps parse
324 10007 expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i];
325
326
2/2
✓ Branch 0 taken 6091 times.
✓ Branch 1 taken 82 times.
 6173 if (abs_frame_num > 0) {
327 6091 int poc_cycle_cnt = (abs_frame_num - 1) / sps->poc_cycle_length;
328 6091 int frame_num_in_poc_cycle = (abs_frame_num - 1) % sps->poc_cycle_length;
329
330 6091 expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
331
2/2
✓ Branch 0 taken 7913 times.
✓ Branch 1 taken 6091 times.
 14004 for (i = 0; i <= frame_num_in_poc_cycle; i++)
332 7913 expectedpoc = expectedpoc + sps->offset_for_ref_frame[i];
333 } else
334 82 expectedpoc = 0;
335
336
2/2
✓ Branch 0 taken 397 times.
✓ Branch 1 taken 5776 times.
 6173 if (nal_ref_idc == 0)
337 397 expectedpoc = expectedpoc + sps->offset_for_non_ref_pic;
338
339 6173 field_poc[0] = expectedpoc + pc->delta_poc[0];
340 6173 field_poc[1] = field_poc[0] + sps->offset_for_top_to_bottom_field;
341
342
2/2
✓ Branch 0 taken 5242 times.
✓ Branch 1 taken 931 times.
 6173 if (picture_structure == PICT_FRAME)
343 5242 field_poc[1] += pc->delta_poc[1];
344 } else {
345 8761 int poc = 2 * (pc->frame_num_offset + pc->frame_num);
346
347
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 8761 times.
 8761 if (!nal_ref_idc)
348 ✗ poc--;
349
350 8761 field_poc[0] = poc;
351 8761 field_poc[1] = poc;
352 }
353
354
1/2
✓ Branch 0 taken 61356 times.
✗ Branch 1 not taken.
 61356 if ( field_poc[0] != (int)field_poc[0]
355
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 61356 times.
 61356 || field_poc[1] != (int)field_poc[1])
356 ✗ return AVERROR_INVALIDDATA;
357
358
2/2
✓ Branch 0 taken 54764 times.
✓ Branch 1 taken 6592 times.
 61356 if (picture_structure != PICT_BOTTOM_FIELD)
359 54764 pic_field_poc[0] = field_poc[0];
360
2/2
✓ Branch 0 taken 54564 times.
✓ Branch 1 taken 6792 times.
 61356 if (picture_structure != PICT_TOP_FIELD)
361 54564 pic_field_poc[1] = field_poc[1];
362 61356 *pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
363
364 61356 return 0;
365 }
366
367 954 static int decode_extradata_ps(const uint8_t *data, int size, H264ParamSets *ps,
368 int is_avc, void *logctx)
369 {
370 954 H2645Packet pkt = { 0 };
371
2/2
✓ Branch 0 taken 732 times.
✓ Branch 1 taken 222 times.
 954 int flags = (H2645_FLAG_IS_NALFF * !!is_avc) | H2645_FLAG_SMALL_PADDING;
372 954 int i, ret = 0;
373
374 954 ret = ff_h2645_packet_split(&pkt, data, size, logctx, 2, AV_CODEC_ID_H264, flags);
375
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 954 times.
 954 if (ret < 0) {
376 ✗ ret = 0;
377 ✗ goto fail;
378 }
379
380
2/2
✓ Branch 0 taken 1178 times.
✓ Branch 1 taken 954 times.
 2132 for (i = 0; i < pkt.nb_nals; i++) {
381 1178 H2645NAL *nal = &pkt.nals[i];
382
2/3
✓ Branch 0 taken 588 times.
✓ Branch 1 taken 590 times.
✗ Branch 2 not taken.
 1178 switch (nal->type) {
383 588 case H264_NAL_SPS: {
384 588 GetBitContext tmp_gb = nal->gb;
385 588 ret = ff_h264_decode_seq_parameter_set(&tmp_gb, logctx, ps, 0);
386
2/2
✓ Branch 0 taken 585 times.
✓ Branch 1 taken 3 times.
 588 if (ret >= 0)
387 588 break;
388 3 av_log(logctx, AV_LOG_DEBUG,
389 "SPS decoding failure, trying again with the complete NAL\n");
390 3 init_get_bits8(&tmp_gb, nal->raw_data + 1, nal->raw_size - 1);
391 3 ret = ff_h264_decode_seq_parameter_set(&tmp_gb, logctx, ps, 0);
392
1/2
✓ Branch 0 taken 3 times.
✗ Branch 1 not taken.
 3 if (ret >= 0)
393 3 break;
394 ✗ ret = ff_h264_decode_seq_parameter_set(&nal->gb, logctx, ps, 1);
395 ✗ if (ret < 0)
396 ✗ goto fail;
397 ✗ break;
398 }
399 590 case H264_NAL_PPS:
400 590 ret = ff_h264_decode_picture_parameter_set(&nal->gb, logctx, ps,
401 nal->size_bits);
402
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 590 times.
 590 if (ret < 0)
403 ✗ goto fail;
404 590 break;
405 ✗ default:
406 ✗ av_log(logctx, AV_LOG_VERBOSE, "Ignoring NAL type %d in extradata\n",
407 nal->type);
408 ✗ break;
409 }
410 }
411
412 954 fail:
413 954 ff_h2645_packet_uninit(&pkt);
414 954 return ret;
415 }
416
417 /* There are (invalid) samples in the wild with mp4-style extradata, where the
418 * parameter sets are stored unescaped (i.e. as RBSP).
419 * This function catches the parameter set decoding failure and tries again
420 * after escaping it */
421 732 static int decode_extradata_ps_mp4(const uint8_t *buf, int buf_size, H264ParamSets *ps,
422 int err_recognition, void *logctx)
423 {
424 int ret;
425
426 732 ret = decode_extradata_ps(buf, buf_size, ps, 1, logctx);
427
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 732 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 732 if (ret < 0 && !(err_recognition & AV_EF_EXPLODE)) {
428 GetByteContext gbc;
429 PutByteContext pbc;
430 uint8_t *escaped_buf;
431 int escaped_buf_size;
432
433 ✗ av_log(logctx, AV_LOG_WARNING,
434 "SPS decoding failure, trying again after escaping the NAL\n");
435
436 ✗ if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3)
437 ✗ return AVERROR(ERANGE);
438 ✗ escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE;
439 ✗ escaped_buf = av_mallocz(escaped_buf_size);
440 ✗ if (!escaped_buf)
441 ✗ return AVERROR(ENOMEM);
442
443 ✗ bytestream2_init(&gbc, buf, buf_size);
444 ✗ bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size);
445
446 ✗ while (bytestream2_get_bytes_left(&gbc)) {
447 ✗ if (bytestream2_get_bytes_left(&gbc) >= 3 &&
448 ✗ bytestream2_peek_be24(&gbc) <= 3) {
449 ✗ bytestream2_put_be24(&pbc, 3);
450 ✗ bytestream2_skip(&gbc, 2);
451 } else
452 ✗ bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
453 }
454
455 ✗ escaped_buf_size = bytestream2_tell_p(&pbc);
456 ✗ AV_WB16(escaped_buf, escaped_buf_size - 2);
457
458 ✗ (void)decode_extradata_ps(escaped_buf, escaped_buf_size, ps, 1, logctx);
459 // lorex.mp4 decodes ok even with extradata decoding failing
460 ✗ av_freep(&escaped_buf);
461 }
462
463 732 return 0;
464 }
465
466 593 int ff_h264_decode_extradata(const uint8_t *data, int size, H264ParamSets *ps,
467 int *is_avc, int *nal_length_size,
468 int err_recognition, void *logctx)
469 {
470 int ret;
471
472
2/4
✓ Branch 0 taken 593 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 593 times.
 593 if (!data || size <= 0)
473 ✗ return AVERROR(EINVAL);
474
475
2/2
✓ Branch 0 taken 371 times.
✓ Branch 1 taken 222 times.
 593 if (data[0] == 1) {
476 int i, cnt, nalsize;
477 371 const uint8_t *p = data;
478
479 371 *is_avc = 1;
480
481
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 371 times.
 371 if (size < 7) {
482 ✗ av_log(logctx, AV_LOG_ERROR, "avcC %d too short\n", size);
483 ✗ return AVERROR_INVALIDDATA;
484 }
485
486 // Decode sps from avcC
487 371 cnt = *(p + 5) & 0x1f; // Number of sps
488 371 p += 6;
489
2/2
✓ Branch 0 taken 366 times.
✓ Branch 1 taken 371 times.
 737 for (i = 0; i < cnt; i++) {
490 366 nalsize = AV_RB16(p) + 2;
491
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 366 times.
 366 if (nalsize > size - (p - data))
492 ✗ return AVERROR_INVALIDDATA;
493 366 ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
494
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 366 times.
 366 if (ret < 0) {
495 ✗ av_log(logctx, AV_LOG_ERROR,
496 "Decoding sps %d from avcC failed\n", i);
497 ✗ return ret;
498 }
499 366 p += nalsize;
500 }
501 // Decode pps from avcC
502 371 cnt = *(p++); // Number of pps
503
2/2
✓ Branch 0 taken 366 times.
✓ Branch 1 taken 371 times.
 737 for (i = 0; i < cnt; i++) {
504 366 nalsize = AV_RB16(p) + 2;
505
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 366 times.
 366 if (nalsize > size - (p - data))
506 ✗ return AVERROR_INVALIDDATA;
507 366 ret = decode_extradata_ps_mp4(p, nalsize, ps, err_recognition, logctx);
508
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 366 times.
 366 if (ret < 0) {
509 ✗ av_log(logctx, AV_LOG_ERROR,
510 "Decoding pps %d from avcC failed\n", i);
511 ✗ return ret;
512 }
513 366 p += nalsize;
514 }
515 // Store right nal length size that will be used to parse all other nals
516 371 *nal_length_size = (data[4] & 0x03) + 1;
517 } else {
518 222 *is_avc = 0;
519 222 ret = decode_extradata_ps(data, size, ps, 0, logctx);
520
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 222 times.
 222 if (ret < 0)
521 ✗ return ret;
522 }
523 593 return size;
524 }
525
526 /**
527 * Compute profile from profile_idc and constraint_set?_flags.
528 *
529 * @param sps SPS
530 *
531 * @return profile as defined by AV_PROFILE_H264_*
532 */
533 61277 int ff_h264_get_profile(const SPS *sps)
534 {
535 61277 int profile = sps->profile_idc;
536
537
3/3
✓ Branch 0 taken 14387 times.
✓ Branch 1 taken 2371 times.
✓ Branch 2 taken 44519 times.
 61277 switch (sps->profile_idc) {
538 14387 case AV_PROFILE_H264_BASELINE:
539 // constraint_set1_flag set to 1
540 14387 profile |= (sps->constraint_set_flags & 1 << 1) ? AV_PROFILE_H264_CONSTRAINED : 0;
541 14387 break;
542 2371 case AV_PROFILE_H264_HIGH_10:
543 case AV_PROFILE_H264_HIGH_422:
544 case AV_PROFILE_H264_HIGH_444_PREDICTIVE:
545 // constraint_set3_flag set to 1
546 2371 profile |= (sps->constraint_set_flags & 1 << 3) ? AV_PROFILE_H264_INTRA : 0;
547 2371 break;
548 }
549
550 61277 return profile;
551 }
552