2 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/common.h"
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/log.h"
24 #include "libavutil/opt.h"
28 #include "av1_parse.h"
30 #include "h2645_parse.h"
33 #include "vc1_common.h"
35 typedef struct ExtractExtradataContext {
38 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
39 uint8_t **data, int *size);
41 /* AV1 specifc fields */
44 /* H264/HEVC specifc fields */
45 H2645Packet h2645_pkt;
49 } ExtractExtradataContext;
51 static int val_in_array(const int *arr, int len, int val)
54 for (i = 0; i < len; i++)
60 static int extract_extradata_av1(AVBSFContext *ctx, AVPacket *pkt,
61 uint8_t **data, int *size)
63 static const int extradata_obu_types[] = {
64 AV1_OBU_SEQUENCE_HEADER, AV1_OBU_METADATA,
66 ExtractExtradataContext *s = ctx->priv_data;
68 int extradata_size = 0, filtered_size = 0;
69 int nb_extradata_obu_types = FF_ARRAY_ELEMS(extradata_obu_types);
70 int i, has_seq = 0, ret = 0;
72 ret = ff_av1_packet_split(&s->av1_pkt, pkt->data, pkt->size, ctx);
76 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
77 AV1OBU *obu = &s->av1_pkt.obus[i];
78 if (val_in_array(extradata_obu_types, nb_extradata_obu_types, obu->type)) {
79 extradata_size += obu->raw_size;
80 if (obu->type == AV1_OBU_SEQUENCE_HEADER)
82 } else if (s->remove) {
83 filtered_size += obu->raw_size;
87 if (extradata_size && has_seq) {
88 AVBufferRef *filtered_buf;
89 uint8_t *extradata, *filtered_data;
92 filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
94 return AVERROR(ENOMEM);
96 memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
98 filtered_data = filtered_buf->data;
101 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
103 av_buffer_unref(&filtered_buf);
104 return AVERROR(ENOMEM);
106 memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
109 *size = extradata_size;
111 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
112 AV1OBU *obu = &s->av1_pkt.obus[i];
113 if (val_in_array(extradata_obu_types, nb_extradata_obu_types,
115 memcpy(extradata, obu->raw_data, obu->raw_size);
116 extradata += obu->raw_size;
117 } else if (s->remove) {
118 memcpy(filtered_data, obu->raw_data, obu->raw_size);
119 filtered_data += obu->raw_size;
124 av_buffer_unref(&pkt->buf);
125 pkt->buf = filtered_buf;
126 pkt->data = filtered_buf->data;
127 pkt->size = filtered_size;
134 static int extract_extradata_h2645(AVBSFContext *ctx, AVPacket *pkt,
135 uint8_t **data, int *size)
137 static const int extradata_nal_types_hevc[] = {
138 HEVC_NAL_VPS, HEVC_NAL_SPS, HEVC_NAL_PPS,
140 static const int extradata_nal_types_h264[] = {
141 H264_NAL_SPS, H264_NAL_PPS,
144 ExtractExtradataContext *s = ctx->priv_data;
146 int extradata_size = 0, filtered_size = 0;
147 const int *extradata_nal_types;
148 int nb_extradata_nal_types;
149 int i, has_sps = 0, has_vps = 0, ret = 0;
151 if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
152 extradata_nal_types = extradata_nal_types_hevc;
153 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_hevc);
155 extradata_nal_types = extradata_nal_types_h264;
156 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_h264);
159 ret = ff_h2645_packet_split(&s->h2645_pkt, pkt->data, pkt->size,
160 ctx, 0, 0, ctx->par_in->codec_id, 1);
164 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
165 H2645NAL *nal = &s->h2645_pkt.nals[i];
166 if (val_in_array(extradata_nal_types, nb_extradata_nal_types, nal->type)) {
167 extradata_size += nal->raw_size + 3;
168 if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
169 if (nal->type == HEVC_NAL_SPS) has_sps = 1;
170 if (nal->type == HEVC_NAL_VPS) has_vps = 1;
172 if (nal->type == H264_NAL_SPS) has_sps = 1;
174 } else if (s->remove) {
175 filtered_size += nal->raw_size + 3;
179 if (extradata_size &&
180 ((ctx->par_in->codec_id == AV_CODEC_ID_HEVC && has_sps && has_vps) ||
181 (ctx->par_in->codec_id == AV_CODEC_ID_H264 && has_sps))) {
182 AVBufferRef *filtered_buf;
183 uint8_t *extradata, *filtered_data;
186 filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
188 return AVERROR(ENOMEM);
190 memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
192 filtered_data = filtered_buf->data;
195 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
197 av_buffer_unref(&filtered_buf);
198 return AVERROR(ENOMEM);
200 memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
203 *size = extradata_size;
205 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
206 H2645NAL *nal = &s->h2645_pkt.nals[i];
207 if (val_in_array(extradata_nal_types, nb_extradata_nal_types,
209 AV_WB24(extradata, 1); // startcode
210 memcpy(extradata + 3, nal->raw_data, nal->raw_size);
211 extradata += 3 + nal->raw_size;
212 } else if (s->remove) {
213 AV_WB24(filtered_data, 1); // startcode
214 memcpy(filtered_data + 3, nal->raw_data, nal->raw_size);
215 filtered_data += 3 + nal->raw_size;
220 av_buffer_unref(&pkt->buf);
221 pkt->buf = filtered_buf;
222 pkt->data = filtered_buf->data;
223 pkt->size = filtered_size;
230 static int extract_extradata_vc1(AVBSFContext *ctx, AVPacket *pkt,
231 uint8_t **data, int *size)
233 ExtractExtradataContext *s = ctx->priv_data;
234 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
235 uint32_t state = UINT32_MAX;
236 int has_extradata = 0, extradata_size = 0;
239 ptr = avpriv_find_start_code(ptr, end, &state);
240 if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
242 } else if (has_extradata && IS_MARKER(state)) {
243 extradata_size = ptr - 4 - pkt->data;
248 if (extradata_size) {
249 *data = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
251 return AVERROR(ENOMEM);
253 memcpy(*data, pkt->data, extradata_size);
254 memset(*data + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
255 *size = extradata_size;
258 pkt->data += extradata_size;
259 pkt->size -= extradata_size;
266 static int extract_extradata_mpeg12(AVBSFContext *ctx, AVPacket *pkt,
267 uint8_t **data, int *size)
269 ExtractExtradataContext *s = ctx->priv_data;
270 uint32_t state = UINT32_MAX;
273 for (i = 0; i < pkt->size; i++) {
274 state = (state << 8) | pkt->data[i];
277 else if (found && state != 0x1B5 && state < 0x200 && state >= 0x100) {
280 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
282 return AVERROR(ENOMEM);
284 memcpy(*data, pkt->data, *size);
285 memset(*data + *size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
298 static int extract_extradata_mpeg4(AVBSFContext *ctx, AVPacket *pkt,
299 uint8_t **data, int *size)
301 ExtractExtradataContext *s = ctx->priv_data;
302 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
303 uint32_t state = UINT32_MAX;
306 ptr = avpriv_find_start_code(ptr, end, &state);
307 if (state == 0x1B3 || state == 0x1B6) {
308 if (ptr - pkt->data > 4) {
309 *size = ptr - 4 - pkt->data;
310 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
312 return AVERROR(ENOMEM);
314 memcpy(*data, pkt->data, *size);
315 memset(*data + *size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
328 static const struct {
330 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
331 uint8_t **data, int *size);
333 { AV_CODEC_ID_AV1, extract_extradata_av1 },
334 { AV_CODEC_ID_AVS2, extract_extradata_mpeg4 },
335 { AV_CODEC_ID_CAVS, extract_extradata_mpeg4 },
336 { AV_CODEC_ID_H264, extract_extradata_h2645 },
337 { AV_CODEC_ID_HEVC, extract_extradata_h2645 },
338 { AV_CODEC_ID_MPEG1VIDEO, extract_extradata_mpeg12 },
339 { AV_CODEC_ID_MPEG2VIDEO, extract_extradata_mpeg12 },
340 { AV_CODEC_ID_MPEG4, extract_extradata_mpeg4 },
341 { AV_CODEC_ID_VC1, extract_extradata_vc1 },
344 static int extract_extradata_init(AVBSFContext *ctx)
346 ExtractExtradataContext *s = ctx->priv_data;
349 for (i = 0; i < FF_ARRAY_ELEMS(extract_tab); i++) {
350 if (extract_tab[i].id == ctx->par_in->codec_id) {
351 s->extract = extract_tab[i].extract;
361 static int extract_extradata_filter(AVBSFContext *ctx, AVPacket *pkt)
363 ExtractExtradataContext *s = ctx->priv_data;
364 uint8_t *extradata = NULL;
368 ret = ff_bsf_get_packet_ref(ctx, pkt);
372 ret = s->extract(ctx, pkt, &extradata, &extradata_size);
377 ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
378 extradata, extradata_size);
380 av_freep(&extradata);
388 av_packet_unref(pkt);
392 static void extract_extradata_close(AVBSFContext *ctx)
394 ExtractExtradataContext *s = ctx->priv_data;
395 ff_av1_packet_uninit(&s->av1_pkt);
396 ff_h2645_packet_uninit(&s->h2645_pkt);
399 static const enum AVCodecID codec_ids[] = {
405 AV_CODEC_ID_MPEG1VIDEO,
406 AV_CODEC_ID_MPEG2VIDEO,
412 #define OFFSET(x) offsetof(ExtractExtradataContext, x)
413 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
414 static const AVOption options[] = {
415 { "remove", "remove the extradata from the bitstream", OFFSET(remove), AV_OPT_TYPE_INT,
416 { .i64 = 0 }, 0, 1, FLAGS },
420 static const AVClass extract_extradata_class = {
421 .class_name = "extract_extradata",
422 .item_name = av_default_item_name,
424 .version = LIBAVUTIL_VERSION_INT,
427 const AVBitStreamFilter ff_extract_extradata_bsf = {
428 .name = "extract_extradata",
429 .codec_ids = codec_ids,
430 .priv_data_size = sizeof(ExtractExtradataContext),
431 .priv_class = &extract_extradata_class,
432 .init = extract_extradata_init,
433 .filter = extract_extradata_filter,
434 .close = extract_extradata_close,