3 * Copyright (c) 2011 Martin Storsjo
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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"
24 #include "avio_internal.h"
26 typedef struct MuxChain {
27 AVFormatContext *mpegts_ctx;
28 AVFormatContext *rtp_ctx;
32 static int rtp_mpegts_write_close(AVFormatContext *s)
34 MuxChain *chain = s->priv_data;
36 if (chain->mpegts_ctx) {
37 av_write_trailer(chain->mpegts_ctx);
38 ffio_free_dyn_buf(&chain->mpegts_ctx->pb);
39 avformat_free_context(chain->mpegts_ctx);
42 av_write_trailer(chain->rtp_ctx);
43 avformat_free_context(chain->rtp_ctx);
46 av_packet_free(&chain->pkt);
51 static int rtp_mpegts_write_header(AVFormatContext *s)
53 MuxChain *chain = s->priv_data;
54 AVFormatContext *mpegts_ctx = NULL, *rtp_ctx = NULL;
55 ff_const59 AVOutputFormat *mpegts_format = av_guess_format("mpegts", NULL, NULL);
56 ff_const59 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
57 int i, ret = AVERROR(ENOMEM);
60 if (!mpegts_format || !rtp_format)
61 return AVERROR(ENOSYS);
62 mpegts_ctx = avformat_alloc_context();
64 return AVERROR(ENOMEM);
65 chain->pkt = av_packet_alloc();
68 mpegts_ctx->oformat = mpegts_format;
69 mpegts_ctx->max_delay = s->max_delay;
70 av_dict_copy(&mpegts_ctx->metadata, s->metadata, 0);
71 for (i = 0; i < s->nb_streams; i++) {
72 AVStream* st = avformat_new_stream(mpegts_ctx, NULL);
75 st->time_base = s->streams[i]->time_base;
76 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
77 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
79 if ((ret = avio_open_dyn_buf(&mpegts_ctx->pb)) < 0)
81 if ((ret = avformat_write_header(mpegts_ctx, NULL)) < 0)
83 for (i = 0; i < s->nb_streams; i++)
84 s->streams[i]->time_base = mpegts_ctx->streams[i]->time_base;
86 chain->mpegts_ctx = mpegts_ctx;
89 rtp_ctx = avformat_alloc_context();
91 ret = AVERROR(ENOMEM);
94 rtp_ctx->oformat = rtp_format;
95 st = avformat_new_stream(rtp_ctx, NULL);
97 ret = AVERROR(ENOMEM);
100 st->time_base.num = 1;
101 st->time_base.den = 90000;
102 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
104 if ((ret = avformat_write_header(rtp_ctx, NULL)) < 0)
106 chain->rtp_ctx = rtp_ctx;
112 ffio_free_dyn_buf(&mpegts_ctx->pb);
113 av_dict_free(&mpegts_ctx->metadata);
114 avformat_free_context(mpegts_ctx);
116 avformat_free_context(rtp_ctx);
117 rtp_mpegts_write_close(s);
121 static int rtp_mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
123 MuxChain *chain = s->priv_data;
126 AVPacket *local_pkt = chain->pkt;
128 if (!chain->mpegts_ctx->pb) {
129 if ((ret = avio_open_dyn_buf(&chain->mpegts_ctx->pb)) < 0)
132 if ((ret = av_write_frame(chain->mpegts_ctx, pkt)) < 0)
134 size = avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
135 chain->mpegts_ctx->pb = NULL;
140 av_packet_unref(local_pkt);
141 local_pkt->data = buf;
142 local_pkt->size = size;
143 local_pkt->stream_index = 0;
144 if (pkt->pts != AV_NOPTS_VALUE)
145 local_pkt->pts = av_rescale_q(pkt->pts,
146 s->streams[pkt->stream_index]->time_base,
147 chain->rtp_ctx->streams[0]->time_base);
148 if (pkt->dts != AV_NOPTS_VALUE)
149 local_pkt->dts = av_rescale_q(pkt->dts,
150 s->streams[pkt->stream_index]->time_base,
151 chain->rtp_ctx->streams[0]->time_base);
152 ret = av_write_frame(chain->rtp_ctx, local_pkt);
158 AVOutputFormat ff_rtp_mpegts_muxer = {
159 .name = "rtp_mpegts",
160 .long_name = NULL_IF_CONFIG_SMALL("RTP/mpegts output format"),
161 .priv_data_size = sizeof(MuxChain),
162 .audio_codec = AV_CODEC_ID_AAC,
163 .video_codec = AV_CODEC_ID_MPEG4,
164 .write_header = rtp_mpegts_write_header,
165 .write_packet = rtp_mpegts_write_packet,
166 .write_trailer = rtp_mpegts_write_close,