FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/bsf/extract_extradata.c
Date: 2024-05-04 02:01:39
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 "hevc.h"
33 #include "startcode.h"
34 #include "vc1_common.h"
35 #include "vvc.h"
36
37 typedef struct ExtractExtradataContext {
38 const AVClass *class;
39
40 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
41 uint8_t **data, int *size);
42
43 /* AV1 specific fields */
44 AV1Packet av1_pkt;
45
46 /* H264/HEVC specific fields */
47 H2645Packet h2645_pkt;
48
49 /* AVOptions */
50 int remove;
51 } ExtractExtradataContext;
52
53 5968 static int val_in_array(const int *arr, size_t len, int val)
54 {
55
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 17103 for (size_t i = 0; i < len; i++)
56
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 13713 if (arr[i] == val)
57 2578 return 1;
58 3390 return 0;
59 }
60
61 8 static int metadata_is_global(const AV1OBU *obu)
62 {
63 static const int metadata_obu_types[] = {
64 AV1_METADATA_TYPE_HDR_CLL, AV1_METADATA_TYPE_HDR_MDCV,
65 };
66 GetBitContext gb;
67 int metadata_type;
68
69
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 8 if (init_get_bits(&gb, obu->data, obu->size_bits) < 0)
70 ✗ return 0;
71
72 8 metadata_type = get_leb(&gb);
73
74 8 return val_in_array(metadata_obu_types, FF_ARRAY_ELEMS(metadata_obu_types),
75 metadata_type);
76 }
77
78 219 static int obu_is_global(const AV1OBU *obu)
79 {
80 static const int extradata_obu_types[] = {
81 AV1_OBU_SEQUENCE_HEADER, AV1_OBU_METADATA,
82 };
83
84
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 219 if (!val_in_array(extradata_obu_types, FF_ARRAY_ELEMS(extradata_obu_types),
85 219 obu->type))
86 169 return 0;
87
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 50 if (obu->type != AV1_OBU_METADATA)
88 42 return 1;
89
90 8 return metadata_is_global(obu);
91 }
92
93 44 static int extract_extradata_av1(AVBSFContext *ctx, AVPacket *pkt,
94 uint8_t **data, int *size)
95 {
96
97 44 ExtractExtradataContext *s = ctx->priv_data;
98
99 44 int extradata_size = 0, filtered_size = 0;
100 44 int i, has_seq = 0, ret = 0;
101
102 44 ret = ff_av1_packet_split(&s->av1_pkt, pkt->data, pkt->size, ctx);
103
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 44 if (ret < 0)
104 ✗ return ret;
105
106
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 181 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
107 137 AV1OBU *obu = &s->av1_pkt.obus[i];
108
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 137 if (obu_is_global(obu)) {
109 25 extradata_size += obu->raw_size;
110
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 25 if (obu->type == AV1_OBU_SEQUENCE_HEADER)
111 21 has_seq = 1;
112
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 112 } else if (s->remove) {
113 ✗ filtered_size += obu->raw_size;
114 }
115 }
116
117
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 44 if (extradata_size && has_seq) {
118 21 AVBufferRef *filtered_buf = NULL;
119 PutByteContext pb_filtered_data, pb_extradata;
120 uint8_t *extradata;
121
122
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 21 if (s->remove) {
123 ✗ filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
124 ✗ if (!filtered_buf) {
125 ✗ return AVERROR(ENOMEM);
126 }
127 ✗ memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
128 }
129
130 21 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
131
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 21 if (!extradata) {
132 ✗ av_buffer_unref(&filtered_buf);
133 ✗ return AVERROR(ENOMEM);
134 }
135
136 21 *data = extradata;
137 21 *size = extradata_size;
138
139 21 bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
140
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 21 if (s->remove)
141 ✗ bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
142
143
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 103 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
144 82 AV1OBU *obu = &s->av1_pkt.obus[i];
145
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 82 if (obu_is_global(obu)) {
146 25 bytestream2_put_bufferu(&pb_extradata, obu->raw_data, obu->raw_size);
147
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 57 } else if (s->remove) {
148 ✗ bytestream2_put_bufferu(&pb_filtered_data, obu->raw_data, obu->raw_size);
149 }
150 }
151
152
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 21 if (s->remove) {
153 ✗ av_buffer_unref(&pkt->buf);
154 ✗ pkt->buf = filtered_buf;
155 ✗ pkt->data = filtered_buf->data;
156 ✗ pkt->size = filtered_size;
157 }
158 }
159
160 44 return 0;
161 }
162
163 547 static int extract_extradata_h2645(AVBSFContext *ctx, AVPacket *pkt,
164 uint8_t **data, int *size)
165 {
166 static const int extradata_nal_types_vvc[] = {
167 VVC_VPS_NUT, VVC_SPS_NUT, VVC_PPS_NUT,
168 };
169 static const int extradata_nal_types_hevc[] = {
170 HEVC_NAL_VPS, HEVC_NAL_SPS, HEVC_NAL_PPS,
171 };
172 static const int extradata_nal_types_h264[] = {
173 H264_NAL_SPS, H264_NAL_PPS,
174 };
175
176 547 ExtractExtradataContext *s = ctx->priv_data;
177
178 547 int extradata_size = 0, filtered_size = 0;
179 const int *extradata_nal_types;
180 size_t nb_extradata_nal_types;
181 547 int i, has_sps = 0, has_vps = 0, ret = 0;
182
183
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 547 if (ctx->par_in->codec_id == AV_CODEC_ID_VVC) {
184 51 extradata_nal_types = extradata_nal_types_vvc;
185 51 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_vvc);
186
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 496 } else if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
187 231 extradata_nal_types = extradata_nal_types_hevc;
188 231 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_hevc);
189 } else {
190 265 extradata_nal_types = extradata_nal_types_h264;
191 265 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_h264);
192 }
193
194 547 ret = ff_h2645_packet_split(&s->h2645_pkt, pkt->data, pkt->size,
195 547 ctx, 0, 0, ctx->par_in->codec_id, 1, 0);
196
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 547 if (ret < 0)
197 ✗ return ret;
198
199
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 3581 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
200 3034 H2645NAL *nal = &s->h2645_pkt.nals[i];
201
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 3034 if (val_in_array(extradata_nal_types, nb_extradata_nal_types, nal->type)) {
202 1260 extradata_size += nal->raw_size + 3;
203
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 1260 if (ctx->par_in->codec_id == AV_CODEC_ID_VVC) {
204
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 108 if (nal->type == VVC_SPS_NUT) has_sps = 1;
205
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 108 if (nal->type == VVC_VPS_NUT) has_vps = 1;
206
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 1152 } else if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
207
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 686 if (nal->type == HEVC_NAL_SPS) has_sps = 1;
208
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 686 if (nal->type == HEVC_NAL_VPS) has_vps = 1;
209 } else {
210
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 466 if (nal->type == H264_NAL_SPS) has_sps = 1;
211 }
212
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 1774 } else if (s->remove) {
213 ✗ filtered_size += nal->raw_size + 3;
214 }
215 }
216
217
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 547 if (extradata_size &&
218
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 478 ((ctx->par_in->codec_id == AV_CODEC_ID_VVC && has_sps) ||
219
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 427 (ctx->par_in->codec_id == AV_CODEC_ID_HEVC && has_sps && has_vps) ||
220
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 229 (ctx->par_in->codec_id == AV_CODEC_ID_H264 && has_sps))) {
221 478 AVBufferRef *filtered_buf = NULL;
222 PutByteContext pb_filtered_data, pb_extradata;
223 uint8_t *extradata;
224
225
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 478 if (s->remove) {
226 ✗ filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
227 ✗ if (!filtered_buf) {
228 ✗ return AVERROR(ENOMEM);
229 }
230 ✗ memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
231 }
232
233 478 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
234
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 478 if (!extradata) {
235 ✗ av_buffer_unref(&filtered_buf);
236 ✗ return AVERROR(ENOMEM);
237 }
238
239 478 *data = extradata;
240 478 *size = extradata_size;
241
242 478 bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
243
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 478 if (s->remove)
244 ✗ bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
245
246
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 3185 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
247 2707 H2645NAL *nal = &s->h2645_pkt.nals[i];
248
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 2707 if (val_in_array(extradata_nal_types, nb_extradata_nal_types,
249 nal->type)) {
250 1260 bytestream2_put_be24u(&pb_extradata, 1); //startcode
251 1260 bytestream2_put_bufferu(&pb_extradata, nal->raw_data, nal->raw_size);
252
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 1447 } else if (s->remove) {
253 ✗ bytestream2_put_be24u(&pb_filtered_data, 1); // startcode
254 ✗ bytestream2_put_bufferu(&pb_filtered_data, nal->raw_data, nal->raw_size);
255 }
256 }
257
258
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 478 if (s->remove) {
259 ✗ av_buffer_unref(&pkt->buf);
260 ✗ pkt->buf = filtered_buf;
261 ✗ pkt->data = filtered_buf->data;
262 ✗ pkt->size = filtered_size;
263 }
264 }
265
266 547 return 0;
267 }
268
269 6 static int extract_extradata_vc1(AVBSFContext *ctx, AVPacket *pkt,
270 uint8_t **data, int *size)
271 {
272 6 ExtractExtradataContext *s = ctx->priv_data;
273 6 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
274 6 uint32_t state = UINT32_MAX;
275 6 int has_extradata = 0, extradata_size = 0;
276
277
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 23 while (ptr < end) {
278 23 ptr = avpriv_find_start_code(ptr, end, &state);
279
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 23 if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
280 17 has_extradata = 1;
281
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 6 } else if (has_extradata && IS_MARKER(state)) {
282 6 extradata_size = ptr - 4 - pkt->data;
283 6 break;
284 }
285 }
286
287
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 6 if (extradata_size) {
288 6 *data = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
289
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 6 if (!*data)
290 ✗ return AVERROR(ENOMEM);
291
292 6 memcpy(*data, pkt->data, extradata_size);
293 6 *size = extradata_size;
294
295
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 6 if (s->remove) {
296 ✗ pkt->data += extradata_size;
297 ✗ pkt->size -= extradata_size;
298 }
299 }
300
301 6 return 0;
302 }
303
304 446 static int extract_extradata_mpeg12(AVBSFContext *ctx, AVPacket *pkt,
305 uint8_t **data, int *size)
306 {
307 446 ExtractExtradataContext *s = ctx->priv_data;
308 446 uint32_t state = UINT32_MAX;
309 446 int i, found = 0;
310
311
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 3846646 for (i = 0; i < pkt->size; i++) {
312 3846389 state = (state << 8) | pkt->data[i];
313
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 3846389 if (state == 0x1B3)
314 189 found = 1;
315
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 3846200 else if (found && state != 0x1B5 && state < 0x200 && state >= 0x100) {
316 189 *size = i - 3;
317 189 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
318
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 189 if (!*data)
319 ✗ return AVERROR(ENOMEM);
320
321 189 memcpy(*data, pkt->data, *size);
322
323
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 189 if (s->remove) {
324 ✗ pkt->data += *size;
325 ✗ pkt->size -= *size;
326 }
327 189 break;
328 }
329 }
330 446 return 0;
331 }
332
333 122 static int extract_extradata_mpeg4(AVBSFContext *ctx, AVPacket *pkt,
334 uint8_t **data, int *size)
335 {
336 122 ExtractExtradataContext *s = ctx->priv_data;
337 122 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
338 122 uint32_t state = UINT32_MAX;
339
340
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 402 while (ptr < end) {
341 402 ptr = avpriv_find_start_code(ptr, end, &state);
342
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 402 if (state == 0x1B3 || state == 0x1B6) {
343
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 122 if (ptr - pkt->data > 4) {
344 72 *size = ptr - 4 - pkt->data;
345 72 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
346
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 72 if (!*data)
347 ✗ return AVERROR(ENOMEM);
348
349 72 memcpy(*data, pkt->data, *size);
350
351
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 72 if (s->remove) {
352 ✗ pkt->data += *size;
353 ✗ pkt->size -= *size;
354 }
355 }
356 122 break;
357 }
358 }
359 122 return 0;
360 }
361
362 static const struct {
363 enum AVCodecID id;
364 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
365 uint8_t **data, int *size);
366 } extract_tab[] = {
367 { AV_CODEC_ID_AV1, extract_extradata_av1 },
368 { AV_CODEC_ID_AVS2, extract_extradata_mpeg4 },
369 { AV_CODEC_ID_AVS3, extract_extradata_mpeg4 },
370 { AV_CODEC_ID_CAVS, extract_extradata_mpeg4 },
371 { AV_CODEC_ID_H264, extract_extradata_h2645 },
372 { AV_CODEC_ID_HEVC, extract_extradata_h2645 },
373 { AV_CODEC_ID_MPEG1VIDEO, extract_extradata_mpeg12 },
374 { AV_CODEC_ID_MPEG2VIDEO, extract_extradata_mpeg12 },
375 { AV_CODEC_ID_MPEG4, extract_extradata_mpeg4 },
376 { AV_CODEC_ID_VC1, extract_extradata_vc1 },
377 { AV_CODEC_ID_VVC, extract_extradata_h2645 },
378 };
379
380 763 static int extract_extradata_init(AVBSFContext *ctx)
381 {
382 763 ExtractExtradataContext *s = ctx->priv_data;
383 int i;
384
385
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 5085 for (i = 0; i < FF_ARRAY_ELEMS(extract_tab); i++) {
386
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 5085 if (extract_tab[i].id == ctx->par_in->codec_id) {
387 763 s->extract = extract_tab[i].extract;
388 763 break;
389 }
390 }
391
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 763 if (!s->extract)
392 ✗ return AVERROR_BUG;
393
394 763 return 0;
395 }
396
397 1566 static int extract_extradata_filter(AVBSFContext *ctx, AVPacket *pkt)
398 {
399 1566 ExtractExtradataContext *s = ctx->priv_data;
400 1566 uint8_t *extradata = NULL;
401 int extradata_size;
402 1566 int ret = 0;
403
404 1566 ret = ff_bsf_get_packet_ref(ctx, pkt);
405
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 1566 if (ret < 0)
406 401 return ret;
407
408 1165 ret = s->extract(ctx, pkt, &extradata, &extradata_size);
409
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 1165 if (ret < 0)
410 ✗ goto fail;
411
412
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 1165 if (extradata) {
413 766 memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
414 766 ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
415 extradata, extradata_size);
416
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 766 if (ret < 0) {
417 ✗ av_freep(&extradata);
418 ✗ goto fail;
419 }
420 }
421
422 1165 return 0;
423
424 ✗ fail:
425 ✗ av_packet_unref(pkt);
426 ✗ return ret;
427 }
428
429 763 static void extract_extradata_close(AVBSFContext *ctx)
430 {
431 763 ExtractExtradataContext *s = ctx->priv_data;
432 763 ff_av1_packet_uninit(&s->av1_pkt);
433 763 ff_h2645_packet_uninit(&s->h2645_pkt);
434 763 }
435
436 static const enum AVCodecID codec_ids[] = {
437 AV_CODEC_ID_AV1,
438 AV_CODEC_ID_AVS2,
439 AV_CODEC_ID_AVS3,
440 AV_CODEC_ID_CAVS,
441 AV_CODEC_ID_H264,
442 AV_CODEC_ID_HEVC,
443 AV_CODEC_ID_MPEG1VIDEO,
444 AV_CODEC_ID_MPEG2VIDEO,
445 AV_CODEC_ID_MPEG4,
446 AV_CODEC_ID_VC1,
447 AV_CODEC_ID_VVC,
448 AV_CODEC_ID_NONE,
449 };
450
451 #define OFFSET(x) offsetof(ExtractExtradataContext, x)
452 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
453 static const AVOption options[] = {
454 { "remove", "remove the extradata from the bitstream", OFFSET(remove), AV_OPT_TYPE_INT,
455 { .i64 = 0 }, 0, 1, FLAGS },
456 { NULL },
457 };
458
459 static const AVClass extract_extradata_class = {
460 .class_name = "extract_extradata",
461 .item_name = av_default_item_name,
462 .option = options,
463 .version = LIBAVUTIL_VERSION_INT,
464 };
465
466 const FFBitStreamFilter ff_extract_extradata_bsf = {
467 .p.name = "extract_extradata",
468 .p.codec_ids = codec_ids,
469 .p.priv_class = &extract_extradata_class,
470 .priv_data_size = sizeof(ExtractExtradataContext),
471 .init = extract_extradata_init,
472 .filter = extract_extradata_filter,
473 .close = extract_extradata_close,
474 };
475