3 * Copyright (c) 2011 Martin Storsjo
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/mathematics.h"
26 AVFormatContext *mpegts_ctx;
27 AVFormatContext *rtp_ctx;
30 static int rtp_mpegts_write_close(AVFormatContext *s)
32 struct MuxChain *chain = s->priv_data;
34 if (chain->mpegts_ctx) {
35 av_write_trailer(chain->mpegts_ctx);
36 if (chain->mpegts_ctx->pb) {
38 avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
41 avformat_free_context(chain->mpegts_ctx);
44 av_write_trailer(chain->rtp_ctx);
45 avformat_free_context(chain->rtp_ctx);
50 static int rtp_mpegts_write_header(AVFormatContext *s)
52 struct MuxChain *chain = s->priv_data;
53 AVFormatContext *mpegts_ctx = NULL, *rtp_ctx = NULL;
54 AVOutputFormat *mpegts_format = av_guess_format("mpegts", NULL, NULL);
55 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
56 int i, ret = AVERROR(ENOMEM);
59 if (!mpegts_format || !rtp_format)
60 return AVERROR(ENOSYS);
61 mpegts_ctx = avformat_alloc_context();
63 return AVERROR(ENOMEM);
64 mpegts_ctx->oformat = mpegts_format;
65 mpegts_ctx->max_delay = s->max_delay;
66 for (i = 0; i < s->nb_streams; i++) {
67 AVStream* st = avformat_new_stream(mpegts_ctx, NULL);
70 st->time_base = s->streams[i]->time_base;
71 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
72 avcodec_copy_context(st->codec, s->streams[i]->codec);
74 if ((ret = avio_open_dyn_buf(&mpegts_ctx->pb)) < 0)
76 if ((ret = avformat_write_header(mpegts_ctx, NULL)) < 0)
78 for (i = 0; i < s->nb_streams; i++)
79 s->streams[i]->time_base = mpegts_ctx->streams[i]->time_base;
81 chain->mpegts_ctx = mpegts_ctx;
84 rtp_ctx = avformat_alloc_context();
86 ret = AVERROR(ENOMEM);
89 rtp_ctx->oformat = rtp_format;
90 st = avformat_new_stream(rtp_ctx, NULL);
91 st->time_base.num = 1;
92 st->time_base.den = 90000;
93 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
94 chain->rtp_ctx = rtp_ctx;
96 if ((ret = avformat_write_header(rtp_ctx, NULL)) < 0)
104 if (mpegts_ctx->pb) {
106 avio_close_dyn_buf(mpegts_ctx->pb, &buf);
109 avformat_free_context(mpegts_ctx);
112 avformat_free_context(rtp_ctx);
113 rtp_mpegts_write_close(s);
117 static int rtp_mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
119 struct MuxChain *chain = s->priv_data;
124 if (!chain->mpegts_ctx->pb) {
125 if ((ret = avio_open_dyn_buf(&chain->mpegts_ctx->pb)) < 0)
128 if ((ret = av_write_frame(chain->mpegts_ctx, pkt)) < 0)
130 size = avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
131 chain->mpegts_ctx->pb = NULL;
136 av_init_packet(&local_pkt);
137 local_pkt.data = buf;
138 local_pkt.size = size;
139 local_pkt.stream_index = 0;
140 if (pkt->pts != AV_NOPTS_VALUE)
141 local_pkt.pts = av_rescale_q(pkt->pts,
142 s->streams[pkt->stream_index]->time_base,
143 chain->rtp_ctx->streams[0]->time_base);
144 if (pkt->dts != AV_NOPTS_VALUE)
145 local_pkt.dts = av_rescale_q(pkt->dts,
146 s->streams[pkt->stream_index]->time_base,
147 chain->rtp_ctx->streams[0]->time_base);
148 ret = av_write_frame(chain->rtp_ctx, &local_pkt);
154 AVOutputFormat ff_rtp_mpegts_muxer = {
155 .name = "rtp_mpegts",
156 .long_name = NULL_IF_CONFIG_SMALL("RTP/mpegts output format"),
157 .priv_data_size = sizeof(struct MuxChain),
158 .audio_codec = AV_CODEC_ID_AAC,
159 .video_codec = AV_CODEC_ID_MPEG4,
160 .write_header = rtp_mpegts_write_header,
161 .write_packet = rtp_mpegts_write_packet,
162 .write_trailer = rtp_mpegts_write_close,