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https://git.ffmpeg.org/ffmpeg.git
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fc308b30bb
Since the mpegts muxer now can handle being called with a NULL AVIOContext, we don't need to try to allocate one before calling write_trailer. Signed-off-by: Martin Storsjö <martin@martin.st>
164 lines
5.1 KiB
C
164 lines
5.1 KiB
C
/*
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* RTP/mpegts muxer
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* Copyright (c) 2011 Martin Storsjo
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "libavutil/mathematics.h"
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#include "avformat.h"
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struct MuxChain {
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AVFormatContext *mpegts_ctx;
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AVFormatContext *rtp_ctx;
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};
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static int rtp_mpegts_write_close(AVFormatContext *s)
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{
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struct MuxChain *chain = s->priv_data;
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if (chain->mpegts_ctx) {
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av_write_trailer(chain->mpegts_ctx);
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if (chain->mpegts_ctx->pb) {
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uint8_t *buf;
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avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
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av_free(buf);
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}
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avformat_free_context(chain->mpegts_ctx);
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}
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if (chain->rtp_ctx) {
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av_write_trailer(chain->rtp_ctx);
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avformat_free_context(chain->rtp_ctx);
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}
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return 0;
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}
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static int rtp_mpegts_write_header(AVFormatContext *s)
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{
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struct MuxChain *chain = s->priv_data;
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AVFormatContext *mpegts_ctx = NULL, *rtp_ctx = NULL;
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AVOutputFormat *mpegts_format = av_guess_format("mpegts", NULL, NULL);
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AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
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int i, ret = AVERROR(ENOMEM);
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AVStream *st;
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if (!mpegts_format || !rtp_format)
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return AVERROR(ENOSYS);
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mpegts_ctx = avformat_alloc_context();
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if (!mpegts_ctx)
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return AVERROR(ENOMEM);
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mpegts_ctx->oformat = mpegts_format;
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mpegts_ctx->max_delay = s->max_delay;
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for (i = 0; i < s->nb_streams; i++) {
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AVStream* st = avformat_new_stream(mpegts_ctx, NULL);
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if (!st)
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goto fail;
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st->time_base = s->streams[i]->time_base;
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st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
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avcodec_copy_context(st->codec, s->streams[i]->codec);
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}
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if ((ret = avio_open_dyn_buf(&mpegts_ctx->pb)) < 0)
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goto fail;
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if ((ret = avformat_write_header(mpegts_ctx, NULL)) < 0)
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goto fail;
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for (i = 0; i < s->nb_streams; i++)
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s->streams[i]->time_base = mpegts_ctx->streams[i]->time_base;
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chain->mpegts_ctx = mpegts_ctx;
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mpegts_ctx = NULL;
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rtp_ctx = avformat_alloc_context();
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if (!rtp_ctx) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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rtp_ctx->oformat = rtp_format;
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st = avformat_new_stream(rtp_ctx, NULL);
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st->time_base.num = 1;
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st->time_base.den = 90000;
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st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
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chain->rtp_ctx = rtp_ctx;
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rtp_ctx->pb = s->pb;
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if ((ret = avformat_write_header(rtp_ctx, NULL)) < 0)
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goto fail;
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rtp_ctx = NULL;
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return 0;
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fail:
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if (mpegts_ctx) {
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if (mpegts_ctx->pb) {
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uint8_t *buf;
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avio_close_dyn_buf(mpegts_ctx->pb, &buf);
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av_free(buf);
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}
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avformat_free_context(mpegts_ctx);
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}
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if (rtp_ctx)
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avformat_free_context(rtp_ctx);
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rtp_mpegts_write_close(s);
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return ret;
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}
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static int rtp_mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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struct MuxChain *chain = s->priv_data;
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int ret = 0, size;
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uint8_t *buf;
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AVPacket local_pkt;
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if (!chain->mpegts_ctx->pb) {
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if ((ret = avio_open_dyn_buf(&chain->mpegts_ctx->pb)) < 0)
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return ret;
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}
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if ((ret = av_write_frame(chain->mpegts_ctx, pkt)) < 0)
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return ret;
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size = avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
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chain->mpegts_ctx->pb = NULL;
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if (size == 0) {
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av_free(buf);
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return 0;
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}
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av_init_packet(&local_pkt);
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local_pkt.data = buf;
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local_pkt.size = size;
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local_pkt.stream_index = 0;
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if (pkt->pts != AV_NOPTS_VALUE)
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local_pkt.pts = av_rescale_q(pkt->pts,
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s->streams[pkt->stream_index]->time_base,
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chain->rtp_ctx->streams[0]->time_base);
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if (pkt->dts != AV_NOPTS_VALUE)
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local_pkt.dts = av_rescale_q(pkt->dts,
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s->streams[pkt->stream_index]->time_base,
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chain->rtp_ctx->streams[0]->time_base);
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ret = av_write_frame(chain->rtp_ctx, &local_pkt);
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av_free(buf);
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return ret;
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}
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AVOutputFormat ff_rtp_mpegts_muxer = {
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.name = "rtp_mpegts",
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.long_name = NULL_IF_CONFIG_SMALL("RTP/mpegts output format"),
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.priv_data_size = sizeof(struct MuxChain),
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.audio_codec = AV_CODEC_ID_AAC,
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.video_codec = AV_CODEC_ID_MPEG4,
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.write_header = rtp_mpegts_write_header,
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.write_packet = rtp_mpegts_write_packet,
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.write_trailer = rtp_mpegts_write_close,
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};
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