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"
27 #include "av1_parse.h"
29 #include "bsf_internal.h"
30 #include "bytestream.h"
31 #include "h2645_parse.h"
34 #include "vc1_common.h"
36 typedef struct ExtractExtradataContext {
39 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
40 uint8_t **data, int *size);
42 /* AV1 specific fields */
45 /* H264/HEVC specific fields */
46 H2645Packet h2645_pkt;
50 } ExtractExtradataContext;
52 static int val_in_array(const int *arr, int len, int val)
55 for (i = 0; i < len; i++)
61 static int extract_extradata_av1(AVBSFContext *ctx, AVPacket *pkt,
62 uint8_t **data, int *size)
64 static const int extradata_obu_types[] = {
65 AV1_OBU_SEQUENCE_HEADER, AV1_OBU_METADATA,
67 ExtractExtradataContext *s = ctx->priv_data;
69 int extradata_size = 0, filtered_size = 0;
70 int nb_extradata_obu_types = FF_ARRAY_ELEMS(extradata_obu_types);
71 int i, has_seq = 0, ret = 0;
73 ret = ff_av1_packet_split(&s->av1_pkt, pkt->data, pkt->size, ctx);
77 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
78 AV1OBU *obu = &s->av1_pkt.obus[i];
79 if (val_in_array(extradata_obu_types, nb_extradata_obu_types, obu->type)) {
80 extradata_size += obu->raw_size;
81 if (obu->type == AV1_OBU_SEQUENCE_HEADER)
83 } else if (s->remove) {
84 filtered_size += obu->raw_size;
88 if (extradata_size && has_seq) {
89 AVBufferRef *filtered_buf = NULL;
90 PutByteContext pb_filtered_data, pb_extradata;
94 filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
96 return AVERROR(ENOMEM);
98 memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
101 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
103 av_buffer_unref(&filtered_buf);
104 return AVERROR(ENOMEM);
108 *size = extradata_size;
110 bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
112 bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
114 for (i = 0; i < s->av1_pkt.nb_obus; i++) {
115 AV1OBU *obu = &s->av1_pkt.obus[i];
116 if (val_in_array(extradata_obu_types, nb_extradata_obu_types,
118 bytestream2_put_bufferu(&pb_extradata, obu->raw_data, obu->raw_size);
119 } else if (s->remove) {
120 bytestream2_put_bufferu(&pb_filtered_data, obu->raw_data, obu->raw_size);
125 av_buffer_unref(&pkt->buf);
126 pkt->buf = filtered_buf;
127 pkt->data = filtered_buf->data;
128 pkt->size = filtered_size;
135 static int extract_extradata_h2645(AVBSFContext *ctx, AVPacket *pkt,
136 uint8_t **data, int *size)
138 static const int extradata_nal_types_hevc[] = {
139 HEVC_NAL_VPS, HEVC_NAL_SPS, HEVC_NAL_PPS,
141 static const int extradata_nal_types_h264[] = {
142 H264_NAL_SPS, H264_NAL_PPS,
145 ExtractExtradataContext *s = ctx->priv_data;
147 int extradata_size = 0, filtered_size = 0;
148 const int *extradata_nal_types;
149 int nb_extradata_nal_types;
150 int i, has_sps = 0, has_vps = 0, ret = 0;
152 if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
153 extradata_nal_types = extradata_nal_types_hevc;
154 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_hevc);
156 extradata_nal_types = extradata_nal_types_h264;
157 nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_h264);
160 ret = ff_h2645_packet_split(&s->h2645_pkt, pkt->data, pkt->size,
161 ctx, 0, 0, ctx->par_in->codec_id, 1, 0);
165 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
166 H2645NAL *nal = &s->h2645_pkt.nals[i];
167 if (val_in_array(extradata_nal_types, nb_extradata_nal_types, nal->type)) {
168 extradata_size += nal->raw_size + 3;
169 if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
170 if (nal->type == HEVC_NAL_SPS) has_sps = 1;
171 if (nal->type == HEVC_NAL_VPS) has_vps = 1;
173 if (nal->type == H264_NAL_SPS) has_sps = 1;
175 } else if (s->remove) {
176 filtered_size += nal->raw_size + 3;
180 if (extradata_size &&
181 ((ctx->par_in->codec_id == AV_CODEC_ID_HEVC && has_sps && has_vps) ||
182 (ctx->par_in->codec_id == AV_CODEC_ID_H264 && has_sps))) {
183 AVBufferRef *filtered_buf = NULL;
184 PutByteContext pb_filtered_data, pb_extradata;
188 filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
190 return AVERROR(ENOMEM);
192 memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
195 extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
197 av_buffer_unref(&filtered_buf);
198 return AVERROR(ENOMEM);
202 *size = extradata_size;
204 bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
206 bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
208 for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
209 H2645NAL *nal = &s->h2645_pkt.nals[i];
210 if (val_in_array(extradata_nal_types, nb_extradata_nal_types,
212 bytestream2_put_be24u(&pb_extradata, 1); //startcode
213 bytestream2_put_bufferu(&pb_extradata, nal->raw_data, nal->raw_size);
214 } else if (s->remove) {
215 bytestream2_put_be24u(&pb_filtered_data, 1); // startcode
216 bytestream2_put_bufferu(&pb_filtered_data, nal->raw_data, nal->raw_size);
221 av_buffer_unref(&pkt->buf);
222 pkt->buf = filtered_buf;
223 pkt->data = filtered_buf->data;
224 pkt->size = filtered_size;
231 static int extract_extradata_vc1(AVBSFContext *ctx, AVPacket *pkt,
232 uint8_t **data, int *size)
234 ExtractExtradataContext *s = ctx->priv_data;
235 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
236 uint32_t state = UINT32_MAX;
237 int has_extradata = 0, extradata_size = 0;
240 ptr = avpriv_find_start_code(ptr, end, &state);
241 if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
243 } else if (has_extradata && IS_MARKER(state)) {
244 extradata_size = ptr - 4 - pkt->data;
249 if (extradata_size) {
250 *data = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
252 return AVERROR(ENOMEM);
254 memcpy(*data, pkt->data, extradata_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) {
279 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
281 return AVERROR(ENOMEM);
283 memcpy(*data, pkt->data, *size);
295 static int extract_extradata_mpeg4(AVBSFContext *ctx, AVPacket *pkt,
296 uint8_t **data, int *size)
298 ExtractExtradataContext *s = ctx->priv_data;
299 const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
300 uint32_t state = UINT32_MAX;
303 ptr = avpriv_find_start_code(ptr, end, &state);
304 if (state == 0x1B3 || state == 0x1B6) {
305 if (ptr - pkt->data > 4) {
306 *size = ptr - 4 - pkt->data;
307 *data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
309 return AVERROR(ENOMEM);
311 memcpy(*data, pkt->data, *size);
324 static const struct {
326 int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
327 uint8_t **data, int *size);
329 { AV_CODEC_ID_AV1, extract_extradata_av1 },
330 { AV_CODEC_ID_AVS2, extract_extradata_mpeg4 },
331 { AV_CODEC_ID_CAVS, extract_extradata_mpeg4 },
332 { AV_CODEC_ID_H264, extract_extradata_h2645 },
333 { AV_CODEC_ID_HEVC, extract_extradata_h2645 },
334 { AV_CODEC_ID_MPEG1VIDEO, extract_extradata_mpeg12 },
335 { AV_CODEC_ID_MPEG2VIDEO, extract_extradata_mpeg12 },
336 { AV_CODEC_ID_MPEG4, extract_extradata_mpeg4 },
337 { AV_CODEC_ID_VC1, extract_extradata_vc1 },
340 static int extract_extradata_init(AVBSFContext *ctx)
342 ExtractExtradataContext *s = ctx->priv_data;
345 for (i = 0; i < FF_ARRAY_ELEMS(extract_tab); i++) {
346 if (extract_tab[i].id == ctx->par_in->codec_id) {
347 s->extract = extract_tab[i].extract;
357 static int extract_extradata_filter(AVBSFContext *ctx, AVPacket *pkt)
359 ExtractExtradataContext *s = ctx->priv_data;
360 uint8_t *extradata = NULL;
364 ret = ff_bsf_get_packet_ref(ctx, pkt);
368 ret = s->extract(ctx, pkt, &extradata, &extradata_size);
373 memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
374 ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
375 extradata, extradata_size);
377 av_freep(&extradata);
385 av_packet_unref(pkt);
389 static void extract_extradata_close(AVBSFContext *ctx)
391 ExtractExtradataContext *s = ctx->priv_data;
392 ff_av1_packet_uninit(&s->av1_pkt);
393 ff_h2645_packet_uninit(&s->h2645_pkt);
396 static const enum AVCodecID codec_ids[] = {
402 AV_CODEC_ID_MPEG1VIDEO,
403 AV_CODEC_ID_MPEG2VIDEO,
409 #define OFFSET(x) offsetof(ExtractExtradataContext, x)
410 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
411 static const AVOption options[] = {
412 { "remove", "remove the extradata from the bitstream", OFFSET(remove), AV_OPT_TYPE_INT,
413 { .i64 = 0 }, 0, 1, FLAGS },
417 static const AVClass extract_extradata_class = {
418 .class_name = "extract_extradata",
419 .item_name = av_default_item_name,
421 .version = LIBAVUTIL_VERSION_INT,
424 const AVBitStreamFilter ff_extract_extradata_bsf = {
425 .name = "extract_extradata",
426 .codec_ids = codec_ids,
427 .priv_data_size = sizeof(ExtractExtradataContext),
428 .priv_class = &extract_extradata_class,
429 .init = extract_extradata_init,
430 .filter = extract_extradata_filter,
431 .close = extract_extradata_close,