435 lines
13 KiB
C
435 lines
13 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "av1.h"
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#include "av1_parse.h"
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#include "bsf.h"
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#include "bsf_internal.h"
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#include "bytestream.h"
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#include "h2645_parse.h"
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#include "h264.h"
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#include "hevc.h"
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#include "vc1_common.h"
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typedef struct ExtractExtradataContext {
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const AVClass *class;
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int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
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uint8_t **data, int *size);
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/* AV1 specific fields */
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AV1Packet av1_pkt;
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/* H264/HEVC specific fields */
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H2645Packet h2645_pkt;
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/* AVOptions */
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int remove;
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} ExtractExtradataContext;
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static int val_in_array(const int *arr, int len, int val)
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{
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int i;
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for (i = 0; i < len; i++)
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if (arr[i] == val)
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return 1;
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return 0;
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}
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static int extract_extradata_av1(AVBSFContext *ctx, AVPacket *pkt,
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uint8_t **data, int *size)
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{
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static const int extradata_obu_types[] = {
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AV1_OBU_SEQUENCE_HEADER, AV1_OBU_METADATA,
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};
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ExtractExtradataContext *s = ctx->priv_data;
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int extradata_size = 0, filtered_size = 0;
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int nb_extradata_obu_types = FF_ARRAY_ELEMS(extradata_obu_types);
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int i, has_seq = 0, ret = 0;
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ret = ff_av1_packet_split(&s->av1_pkt, pkt->data, pkt->size, ctx);
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if (ret < 0)
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return ret;
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for (i = 0; i < s->av1_pkt.nb_obus; i++) {
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AV1OBU *obu = &s->av1_pkt.obus[i];
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if (val_in_array(extradata_obu_types, nb_extradata_obu_types, obu->type)) {
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extradata_size += obu->raw_size;
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if (obu->type == AV1_OBU_SEQUENCE_HEADER)
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has_seq = 1;
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} else if (s->remove) {
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filtered_size += obu->raw_size;
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}
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}
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if (extradata_size && has_seq) {
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AVBufferRef *filtered_buf = NULL;
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PutByteContext pb_filtered_data, pb_extradata;
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uint8_t *extradata;
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if (s->remove) {
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filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!filtered_buf) {
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return AVERROR(ENOMEM);
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}
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memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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}
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extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!extradata) {
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av_buffer_unref(&filtered_buf);
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return AVERROR(ENOMEM);
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}
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*data = extradata;
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*size = extradata_size;
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bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
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if (s->remove)
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bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
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for (i = 0; i < s->av1_pkt.nb_obus; i++) {
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AV1OBU *obu = &s->av1_pkt.obus[i];
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if (val_in_array(extradata_obu_types, nb_extradata_obu_types,
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obu->type)) {
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bytestream2_put_bufferu(&pb_extradata, obu->raw_data, obu->raw_size);
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} else if (s->remove) {
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bytestream2_put_bufferu(&pb_filtered_data, obu->raw_data, obu->raw_size);
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}
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}
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if (s->remove) {
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av_buffer_unref(&pkt->buf);
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pkt->buf = filtered_buf;
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pkt->data = filtered_buf->data;
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pkt->size = filtered_size;
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}
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}
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return 0;
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}
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static int extract_extradata_h2645(AVBSFContext *ctx, AVPacket *pkt,
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uint8_t **data, int *size)
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{
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static const int extradata_nal_types_hevc[] = {
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HEVC_NAL_VPS, HEVC_NAL_SPS, HEVC_NAL_PPS,
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};
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static const int extradata_nal_types_h264[] = {
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H264_NAL_SPS, H264_NAL_PPS,
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};
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ExtractExtradataContext *s = ctx->priv_data;
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int extradata_size = 0, filtered_size = 0;
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const int *extradata_nal_types;
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int nb_extradata_nal_types;
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int i, has_sps = 0, has_vps = 0, ret = 0;
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if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
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extradata_nal_types = extradata_nal_types_hevc;
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nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_hevc);
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} else {
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extradata_nal_types = extradata_nal_types_h264;
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nb_extradata_nal_types = FF_ARRAY_ELEMS(extradata_nal_types_h264);
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}
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ret = ff_h2645_packet_split(&s->h2645_pkt, pkt->data, pkt->size,
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ctx, 0, 0, ctx->par_in->codec_id, 1, 0);
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if (ret < 0)
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return ret;
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for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
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H2645NAL *nal = &s->h2645_pkt.nals[i];
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if (val_in_array(extradata_nal_types, nb_extradata_nal_types, nal->type)) {
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extradata_size += nal->raw_size + 3;
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if (ctx->par_in->codec_id == AV_CODEC_ID_HEVC) {
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if (nal->type == HEVC_NAL_SPS) has_sps = 1;
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if (nal->type == HEVC_NAL_VPS) has_vps = 1;
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} else {
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if (nal->type == H264_NAL_SPS) has_sps = 1;
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}
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} else if (s->remove) {
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filtered_size += nal->raw_size + 3;
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}
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}
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if (extradata_size &&
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((ctx->par_in->codec_id == AV_CODEC_ID_HEVC && has_sps && has_vps) ||
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(ctx->par_in->codec_id == AV_CODEC_ID_H264 && has_sps))) {
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AVBufferRef *filtered_buf = NULL;
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PutByteContext pb_filtered_data, pb_extradata;
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uint8_t *extradata;
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if (s->remove) {
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filtered_buf = av_buffer_alloc(filtered_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!filtered_buf) {
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return AVERROR(ENOMEM);
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}
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memset(filtered_buf->data + filtered_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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}
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extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!extradata) {
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av_buffer_unref(&filtered_buf);
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return AVERROR(ENOMEM);
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}
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*data = extradata;
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*size = extradata_size;
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bytestream2_init_writer(&pb_extradata, extradata, extradata_size);
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if (s->remove)
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bytestream2_init_writer(&pb_filtered_data, filtered_buf->data, filtered_size);
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for (i = 0; i < s->h2645_pkt.nb_nals; i++) {
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H2645NAL *nal = &s->h2645_pkt.nals[i];
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if (val_in_array(extradata_nal_types, nb_extradata_nal_types,
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nal->type)) {
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bytestream2_put_be24u(&pb_extradata, 1); //startcode
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bytestream2_put_bufferu(&pb_extradata, nal->raw_data, nal->raw_size);
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} else if (s->remove) {
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bytestream2_put_be24u(&pb_filtered_data, 1); // startcode
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bytestream2_put_bufferu(&pb_filtered_data, nal->raw_data, nal->raw_size);
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}
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}
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if (s->remove) {
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av_buffer_unref(&pkt->buf);
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pkt->buf = filtered_buf;
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pkt->data = filtered_buf->data;
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pkt->size = filtered_size;
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}
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}
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return 0;
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}
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static int extract_extradata_vc1(AVBSFContext *ctx, AVPacket *pkt,
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uint8_t **data, int *size)
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{
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ExtractExtradataContext *s = ctx->priv_data;
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const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
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uint32_t state = UINT32_MAX;
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int has_extradata = 0, extradata_size = 0;
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while (ptr < end) {
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ptr = avpriv_find_start_code(ptr, end, &state);
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if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
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has_extradata = 1;
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} else if (has_extradata && IS_MARKER(state)) {
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extradata_size = ptr - 4 - pkt->data;
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break;
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}
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}
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if (extradata_size) {
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*data = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!*data)
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return AVERROR(ENOMEM);
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memcpy(*data, pkt->data, extradata_size);
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*size = extradata_size;
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if (s->remove) {
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pkt->data += extradata_size;
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pkt->size -= extradata_size;
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}
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}
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return 0;
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}
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static int extract_extradata_mpeg12(AVBSFContext *ctx, AVPacket *pkt,
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uint8_t **data, int *size)
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{
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ExtractExtradataContext *s = ctx->priv_data;
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uint32_t state = UINT32_MAX;
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int i, found = 0;
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for (i = 0; i < pkt->size; i++) {
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state = (state << 8) | pkt->data[i];
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if (state == 0x1B3)
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found = 1;
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else if (found && state != 0x1B5 && state < 0x200 && state >= 0x100) {
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*size = i - 3;
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*data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!*data)
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return AVERROR(ENOMEM);
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memcpy(*data, pkt->data, *size);
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if (s->remove) {
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pkt->data += *size;
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pkt->size -= *size;
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}
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break;
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}
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}
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return 0;
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}
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static int extract_extradata_mpeg4(AVBSFContext *ctx, AVPacket *pkt,
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uint8_t **data, int *size)
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{
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ExtractExtradataContext *s = ctx->priv_data;
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const uint8_t *ptr = pkt->data, *end = pkt->data + pkt->size;
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uint32_t state = UINT32_MAX;
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while (ptr < end) {
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ptr = avpriv_find_start_code(ptr, end, &state);
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if (state == 0x1B3 || state == 0x1B6) {
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if (ptr - pkt->data > 4) {
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*size = ptr - 4 - pkt->data;
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*data = av_malloc(*size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!*data)
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return AVERROR(ENOMEM);
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memcpy(*data, pkt->data, *size);
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if (s->remove) {
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pkt->data += *size;
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pkt->size -= *size;
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}
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}
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break;
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}
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}
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return 0;
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}
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static const struct {
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enum AVCodecID id;
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int (*extract)(AVBSFContext *ctx, AVPacket *pkt,
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uint8_t **data, int *size);
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} extract_tab[] = {
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{ AV_CODEC_ID_AV1, extract_extradata_av1 },
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{ AV_CODEC_ID_AVS2, extract_extradata_mpeg4 },
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{ AV_CODEC_ID_AVS3, extract_extradata_mpeg4 },
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{ AV_CODEC_ID_CAVS, extract_extradata_mpeg4 },
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{ AV_CODEC_ID_H264, extract_extradata_h2645 },
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{ AV_CODEC_ID_HEVC, extract_extradata_h2645 },
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{ AV_CODEC_ID_MPEG1VIDEO, extract_extradata_mpeg12 },
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{ AV_CODEC_ID_MPEG2VIDEO, extract_extradata_mpeg12 },
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{ AV_CODEC_ID_MPEG4, extract_extradata_mpeg4 },
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{ AV_CODEC_ID_VC1, extract_extradata_vc1 },
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};
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static int extract_extradata_init(AVBSFContext *ctx)
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{
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ExtractExtradataContext *s = ctx->priv_data;
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(extract_tab); i++) {
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if (extract_tab[i].id == ctx->par_in->codec_id) {
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s->extract = extract_tab[i].extract;
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break;
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}
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}
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if (!s->extract)
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return AVERROR_BUG;
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return 0;
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}
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static int extract_extradata_filter(AVBSFContext *ctx, AVPacket *pkt)
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{
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ExtractExtradataContext *s = ctx->priv_data;
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uint8_t *extradata = NULL;
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int extradata_size;
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int ret = 0;
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ret = ff_bsf_get_packet_ref(ctx, pkt);
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if (ret < 0)
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return ret;
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ret = s->extract(ctx, pkt, &extradata, &extradata_size);
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if (ret < 0)
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goto fail;
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if (extradata) {
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memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
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extradata, extradata_size);
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if (ret < 0) {
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av_freep(&extradata);
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goto fail;
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}
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}
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return 0;
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fail:
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av_packet_unref(pkt);
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return ret;
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}
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static void extract_extradata_close(AVBSFContext *ctx)
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{
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ExtractExtradataContext *s = ctx->priv_data;
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ff_av1_packet_uninit(&s->av1_pkt);
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ff_h2645_packet_uninit(&s->h2645_pkt);
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}
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static const enum AVCodecID codec_ids[] = {
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AV_CODEC_ID_AV1,
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AV_CODEC_ID_AVS2,
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AV_CODEC_ID_AVS3,
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AV_CODEC_ID_CAVS,
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AV_CODEC_ID_H264,
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AV_CODEC_ID_HEVC,
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AV_CODEC_ID_MPEG1VIDEO,
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AV_CODEC_ID_MPEG2VIDEO,
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AV_CODEC_ID_MPEG4,
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AV_CODEC_ID_VC1,
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AV_CODEC_ID_NONE,
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};
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#define OFFSET(x) offsetof(ExtractExtradataContext, x)
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#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
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static const AVOption options[] = {
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{ "remove", "remove the extradata from the bitstream", OFFSET(remove), AV_OPT_TYPE_INT,
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{ .i64 = 0 }, 0, 1, FLAGS },
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{ NULL },
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};
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static const AVClass extract_extradata_class = {
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.class_name = "extract_extradata",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const AVBitStreamFilter ff_extract_extradata_bsf = {
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.name = "extract_extradata",
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.codec_ids = codec_ids,
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.priv_data_size = sizeof(ExtractExtradataContext),
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.priv_class = &extract_extradata_class,
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.init = extract_extradata_init,
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.filter = extract_extradata_filter,
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.close = extract_extradata_close,
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};
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