FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/bsf/extract_extradata.c
Date: 2025-10-19 14:07:46
Exec Total Coverage
Lines: 169 215 78.6%
Functions: 11 11 100.0%
Branches: 116 156 74.4%
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 <stdint.h>
20
21 #include "libavutil/log.h"
22 #include "libavutil/mem.h"
23 #include "libavutil/opt.h"
24
25 #include "av1.h"
26 #include "av1_parse.h"
27 #include "bsf.h"
28 #include "bsf_internal.h"
29 #include "bytestream.h"
30 #include "h2645_parse.h"
31 #include "h264.h"
32 #include "startcode.h"
33 #include "vc1_common.h"
34 #include "vvc.h"
35
36 #include "hevc/hevc.h"
37
38 typedef struct ExtractExtradataContext {
39 const AVClass *class;
40
41 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
42 uint8_t **data, int *size);
43
44 /* AV1 specific fields */
45 AV1Packet av1_pkt;
46
47 /* H264/HEVC specific fields */
48 H2645Packet h2645_pkt;
49
50 /* AVOptions */
51 int remove;
52 } ExtractExtradataContext;
53
54 6398 static int val_in_array(const int *arr, size_t len, int val)
55 {
56
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 18413 for (size_t i = 0; i < len; i++)
57
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 14867 if (arr[i] == val)
58 2852 return 1;
59 3546 return 0;
60 }
61
62 8 static int metadata_is_global(const AV1OBU *obu)
63 {
64 static const int metadata_obu_types[] = {
65 AV1_METADATA_TYPE_HDR_CLL, AV1_METADATA_TYPE_HDR_MDCV,
66 };
67 GetBitContext gb;
68 int metadata_type;
69
70
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 8 if (init_get_bits(&gb, obu->data, obu->size_bits) < 0)
71 ✗ return 0;
72
73 8 metadata_type = get_leb(&gb);
74
75 8 return val_in_array(metadata_obu_types, FF_ARRAY_ELEMS(metadata_obu_types),
76 metadata_type);
77 }
78
79 219 static int obu_is_global(const AV1OBU *obu)
80 {
81 static const int extradata_obu_types[] = {
82 AV1_OBU_SEQUENCE_HEADER, AV1_OBU_METADATA,
83 };
84
85
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 219 if (!val_in_array(extradata_obu_types, FF_ARRAY_ELEMS(extradata_obu_types),
86 219 obu->type))
87 169 return 0;
88
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 50 if (obu->type != AV1_OBU_METADATA)
89 42 return 1;
90
91 8 return metadata_is_global(obu);
92 }
93
94 44 static int extract_extradata_av1(AVBSFContext *ctx, AVPacket *pkt,
95 uint8_t **data, int *size)
96 {
97
98 44 ExtractExtradataContext *s = ctx->priv_data;
99
100 44 int extradata_size = 0, filtered_size = 0;
101 44 int i, has_seq = 0, ret = 0;
102
103 44 ret = ff_av1_packet_split(&s->av1_pkt, pkt->data, pkt->size, ctx);
104
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 44 if (ret < 0)
105 ✗ return ret;
106
107
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 181 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
108 137 AV1OBU *obu = &s->av1_pkt.obus[i];
109
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 137 if (obu_is_global(obu)) {
110 25 extradata_size += obu->raw_size;
111
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 25 if (obu->type == AV1_OBU_SEQUENCE_HEADER)
112 21 has_seq = 1;
113
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 112 } else if (s->remove) {
114 ✗ filtered_size += obu->raw_size;
115 }
116 }
117
118
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 44 if (extradata_size && has_seq) {
119 21 AVBufferRef *filtered_buf = NULL;
120 PutByteContext pb_filtered_data, pb_extradata;
121 uint8_t *extradata;
122
123
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 21 if (s->remove) {
124 ✗ filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
125 ✗ if (!filtered_buf) {
126 ✗ return AVERROR(ENOMEM);
127 }
128 ✗ memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
129 }
130
131 21 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
132
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 21 if (!extradata) {
133 ✗ av_buffer_unref(&filtered_buf);
134 ✗ return AVERROR(ENOMEM);
135 }
136
137 21 *data = extradata;
138 21 *size = extradata_size;
139
140 21 bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
141
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 21 if (s->remove)
142 ✗ bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
143
144
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 103 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
145 82 AV1OBU *obu = &s->av1_pkt.obus[i];
146
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 82 if (obu_is_global(obu)) {
147 25 bytestream2_put_bufferu(&pb_extradata, obu->raw_data, obu->raw_size);
148
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 57 } else if (s->remove) {
149 ✗ bytestream2_put_bufferu(&pb_filtered_data, obu->raw_data, obu->raw_size);
150 }
151 }
152
153
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 21 if (s->remove) {
154 ✗ av_buffer_unref(&pkt->buf);
155 ✗ pkt->buf = filtered_buf;
156 ✗ pkt->data = filtered_buf->data;
157 ✗ pkt->size = filtered_size;
158 }
159 }
160
161 44 return 0;
162 }
163
164 571 static int extract_extradata_h2645(AVBSFContext *ctx, AVPacket *pkt,
165 uint8_t **data, int *size)
166 {
167 static const int extradata_nal_types_vvc[] = {
168 VVC_VPS_NUT, VVC_SPS_NUT, VVC_PPS_NUT,
169 };
170 static const int extradata_nal_types_hevc[] = {
171 HEVC_NAL_VPS, HEVC_NAL_SPS, HEVC_NAL_PPS,
172 };
173 static const int extradata_nal_types_h264[] = {
174 H264_NAL_SPS, H264_NAL_PPS,
175 };
176
177 571 ExtractExtradataContext *s = ctx->priv_data;
178
179 571 int extradata_size = 0, filtered_size = 0;
180 const int *extradata_nal_types;
181 size_t nb_extradata_nal_types;
182 571 int i, has_sps = 0, has_vps = 0, ret = 0;
183
184
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 571 if (ctx->par_in->codec_id == AV_CODEC_ID_VVC) {
185 60 extradata_nal_types = extradata_nal_types_vvc;
186 60 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_vvc);
187
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 511 } else if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
188 244 extradata_nal_types = extradata_nal_types_hevc;
189 244 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_hevc);
190 } else {
191 267 extradata_nal_types = extradata_nal_types_h264;
192 267 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_h264);
193 }
194
195 571 ret = ff_h2645_packet_split(&s->h2645_pkt, pkt->data, pkt->size,
196 571 ctx, 0, ctx->par_in->codec_id, H2645_FLAG_SMALL_PADDING);
197
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 571 if (ret < 0)
198 ✗ return ret;
199
200
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 3820 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
201 3249 H2645NAL *nal = &s->h2645_pkt.nals[i];
202
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 3249 if (val_in_array(extradata_nal_types, nb_extradata_nal_types, nal->type)) {
203 1397 extradata_size += nal->raw_size + 3;
204
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 1397 if (ctx->par_in->codec_id == AV_CODEC_ID_VVC) {
205
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 191 if (nal->type == VVC_SPS_NUT) has_sps = 1;
206
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 191 if (nal->type == VVC_VPS_NUT) has_vps = 1;
207
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 1206 } else if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
208
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 735 if (nal->type == HEVC_NAL_SPS) has_sps = 1;
209
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 735 if (nal->type == HEVC_NAL_VPS) has_vps = 1;
210 } else {
211
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 471 if (nal->type == H264_NAL_SPS) has_sps = 1;
212 }
213
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 1852 } else if (s->remove) {
214 ✗ filtered_size += nal->raw_size + 3;
215 }
216 }
217
218
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 571 if (extradata_size &&
219
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 502 ((ctx->par_in->codec_id == AV_CODEC_ID_VVC && has_sps) ||
220
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 442 (ctx->par_in->codec_id == AV_CODEC_ID_HEVC && has_sps && has_vps) ||
221
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 231 (ctx->par_in->codec_id == AV_CODEC_ID_H264 && has_sps))) {
222 502 AVBufferRef *filtered_buf = NULL;
223 PutByteContext pb_filtered_data, pb_extradata;
224 uint8_t *extradata;
225
226
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 502 if (s->remove) {
227 ✗ filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
228 ✗ if (!filtered_buf) {
229 ✗ return AVERROR(ENOMEM);
230 }
231 ✗ memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
232 }
233
234 502 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
235
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 502 if (!extradata) {
236 ✗ av_buffer_unref(&filtered_buf);
237 ✗ return AVERROR(ENOMEM);
238 }
239
240 502 *data = extradata;
241 502 *size = extradata_size;
242
243 502 bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
244
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 502 if (s->remove)
245 ✗ bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
246
247
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 3424 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
248 2922 H2645NAL *nal = &s->h2645_pkt.nals[i];
249
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 2922 if (val_in_array(extradata_nal_types, nb_extradata_nal_types,
250 nal->type)) {
251 1397 bytestream2_put_be24u(&pb_extradata, 1); //startcode
252 1397 bytestream2_put_bufferu(&pb_extradata, nal->raw_data, nal->raw_size);
253
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 1525 } else if (s->remove) {
254 ✗ bytestream2_put_be24u(&pb_filtered_data, 1); // startcode
255 ✗ bytestream2_put_bufferu(&pb_filtered_data, nal->raw_data, nal->raw_size);
256 }
257 }
258
259
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 502 if (s->remove) {
260 ✗ av_buffer_unref(&pkt->buf);
261 ✗ pkt->buf = filtered_buf;
262 ✗ pkt->data = filtered_buf->data;
263 ✗ pkt->size = filtered_size;
264 }
265 }
266
267 571 return 0;
268 }
269
270 6 static int extract_extradata_vc1(AVBSFContext *ctx, AVPacket *pkt,
271 uint8_t **data, int *size)
272 {
273 6 ExtractExtradataContext *s = ctx->priv_data;
274 6 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
275 6 uint32_t state = UINT32_MAX;
276 6 int has_extradata = 0, extradata_size = 0;
277
278
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 23 while (ptr < end) {
279 23 ptr = avpriv_find_start_code(ptr, end, &state);
280
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 23 if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
281 17 has_extradata = 1;
282
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 6 } else if (has_extradata && IS_MARKER(state)) {
283 6 extradata_size = ptr - 4 - pkt->data;
284 6 break;
285 }
286 }
287
288
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 6 if (extradata_size) {
289 6 *data = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
290
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 6 if (!*data)
291 ✗ return AVERROR(ENOMEM);
292
293 6 memcpy(*data, pkt->data, extradata_size);
294 6 *size = extradata_size;
295
296
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 6 if (s->remove) {
297 ✗ pkt->data += extradata_size;
298 ✗ pkt->size -= extradata_size;
299 }
300 }
301
302 6 return 0;
303 }
304
305 459 static int extract_extradata_mpeg12(AVBSFContext *ctx, AVPacket *pkt,
306 uint8_t **data, int *size)
307 {
308 459 ExtractExtradataContext *s = ctx->priv_data;
309 459 uint32_t state = UINT32_MAX;
310 459 int i, found = 0;
311
312
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 4185187 for (i = 0; i < pkt->size; i++) {
313 4184922 state = (state << 8) | pkt->data[i];
314
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 4184922 if (state == 0x1B3)
315 194 found = 1;
316
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 4184728 else if (found && state != 0x1B5 && state < 0x200 && state >= 0x100) {
317 194 *size = i - 3;
318 194 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
319
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 194 if (!*data)
320 ✗ return AVERROR(ENOMEM);
321
322 194 memcpy(*data, pkt->data, *size);
323
324
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 194 if (s->remove) {
325 ✗ pkt->data += *size;
326 ✗ pkt->size -= *size;
327 }
328 194 break;
329 }
330 }
331 459 return 0;
332 }
333
334 121 static int extract_extradata_mpeg4(AVBSFContext *ctx, AVPacket *pkt,
335 uint8_t **data, int *size)
336 {
337 121 ExtractExtradataContext *s = ctx->priv_data;
338 121 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
339 121 uint32_t state = UINT32_MAX;
340
341
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 397 while (ptr < end) {
342 397 ptr = avpriv_find_start_code(ptr, end, &state);
343
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 397 if (state == 0x1B3 || state == 0x1B6) {
344
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 121 if (ptr - pkt->data > 4) {
345 71 *size = ptr - 4 - pkt->data;
346 71 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
347
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 71 if (!*data)
348 ✗ return AVERROR(ENOMEM);
349
350 71 memcpy(*data, pkt->data, *size);
351
352
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 71 if (s->remove) {
353 ✗ pkt->data += *size;
354 ✗ pkt->size -= *size;
355 }
356 }
357 121 break;
358 }
359 }
360 121 return 0;
361 }
362
363 static const struct {
364 enum AVCodecID id;
365 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
366 uint8_t **data, int *size);
367 } extract_tab[] = {
368 { AV_CODEC_ID_AV1, extract_extradata_av1 },
369 { AV_CODEC_ID_AVS2, extract_extradata_mpeg4 },
370 { AV_CODEC_ID_AVS3, extract_extradata_mpeg4 },
371 { AV_CODEC_ID_CAVS, extract_extradata_mpeg4 },
372 { AV_CODEC_ID_H264, extract_extradata_h2645 },
373 { AV_CODEC_ID_HEVC, extract_extradata_h2645 },
374 { AV_CODEC_ID_MPEG1VIDEO, extract_extradata_mpeg12 },
375 { AV_CODEC_ID_MPEG2VIDEO, extract_extradata_mpeg12 },
376 { AV_CODEC_ID_MPEG4, extract_extradata_mpeg4 },
377 { AV_CODEC_ID_VC1, extract_extradata_vc1 },
378 { AV_CODEC_ID_VVC, extract_extradata_h2645 },
379 };
380
381 793 static int extract_extradata_init(AVBSFContext *ctx)
382 {
383 793 ExtractExtradataContext *s = ctx->priv_data;
384 int i;
385
386
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 5320 for (i = 0; i < FF_ARRAY_ELEMS(extract_tab); i++) {
387
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 5320 if (extract_tab[i].id == ctx->par_in->codec_id) {
388 793 s->extract = extract_tab[i].extract;
389 793 break;
390 }
391 }
392
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 793 if (!s->extract)
393 ✗ return AVERROR_BUG;
394
395 793 return 0;
396 }
397
398 1610 static int extract_extradata_filter(AVBSFContext *ctx, AVPacket *pkt)
399 {
400 1610 ExtractExtradataContext *s = ctx->priv_data;
401 1610 uint8_t *extradata = NULL;
402 int extradata_size;
403 1610 int ret = 0;
404
405 1610 ret = ff_bsf_get_packet_ref(ctx, pkt);
406
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 1610 if (ret < 0)
407 409 return ret;
408
409 1201 ret = s->extract(ctx, pkt, &extradata, &extradata_size);
410
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 1201 if (ret < 0)
411 ✗ goto fail;
412
413
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 1201 if (extradata) {
414 794 memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
415 794 ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
416 extradata, extradata_size);
417
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 794 if (ret < 0) {
418 ✗ av_freep(&extradata);
419 ✗ goto fail;
420 }
421 }
422
423 1201 return 0;
424
425 ✗ fail:
426 ✗ av_packet_unref(pkt);
427 ✗ return ret;
428 }
429
430 793 static void extract_extradata_close(AVBSFContext *ctx)
431 {
432 793 ExtractExtradataContext *s = ctx->priv_data;
433 793 ff_av1_packet_uninit(&s->av1_pkt);
434 793 ff_h2645_packet_uninit(&s->h2645_pkt);
435 793 }
436
437 static const enum AVCodecID codec_ids[] = {
438 AV_CODEC_ID_AV1,
439 AV_CODEC_ID_AVS2,
440 AV_CODEC_ID_AVS3,
441 AV_CODEC_ID_CAVS,
442 AV_CODEC_ID_H264,
443 AV_CODEC_ID_HEVC,
444 AV_CODEC_ID_MPEG1VIDEO,
445 AV_CODEC_ID_MPEG2VIDEO,
446 AV_CODEC_ID_MPEG4,
447 AV_CODEC_ID_VC1,
448 AV_CODEC_ID_VVC,
449 AV_CODEC_ID_NONE,
450 };
451
452 #define OFFSET(x) offsetof(ExtractExtradataContext, x)
453 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
454 static const AVOption options[] = {
455 { "remove", "remove the extradata from the bitstream", OFFSET(remove), AV_OPT_TYPE_INT,
456 { .i64 = 0 }, 0, 1, FLAGS },
457 { NULL },
458 };
459
460 static const AVClass extract_extradata_class = {
461 .class_name = "extract_extradata",
462 .item_name = av_default_item_name,
463 .option = options,
464 .version = LIBAVUTIL_VERSION_INT,
465 };
466
467 const FFBitStreamFilter ff_extract_extradata_bsf = {
468 .p.name = "extract_extradata",
469 .p.codec_ids = codec_ids,
470 .p.priv_class = &extract_extradata_class,
471 .priv_data_size = sizeof(ExtractExtradataContext),
472 .init = extract_extradata_init,
473 .filter = extract_extradata_filter,
474 .close = extract_extradata_close,
475 };
476