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"
23 #include "libavutil/opt.h"
25 #include "avio_internal.h"
27 typedef struct MuxChain {
28 AVFormatContext *mpegts_ctx;
29 AVFormatContext *rtp_ctx;
31 AVDictionary* mpegts_muxer_options;
34 static int rtp_mpegts_write_close(AVFormatContext *s)
36 MuxChain *chain = s->priv_data;
38 if (chain->mpegts_ctx) {
39 av_write_trailer(chain->mpegts_ctx);
40 ffio_free_dyn_buf(&chain->mpegts_ctx->pb);
41 avformat_free_context(chain->mpegts_ctx);
44 av_write_trailer(chain->rtp_ctx);
45 avformat_free_context(chain->rtp_ctx);
48 av_packet_free(&chain->pkt);
53 static int rtp_mpegts_write_header(AVFormatContext *s)
55 MuxChain *chain = s->priv_data;
56 AVFormatContext *mpegts_ctx = NULL, *rtp_ctx = NULL;
57 ff_const59 AVOutputFormat *mpegts_format = av_guess_format("mpegts", NULL, NULL);
58 ff_const59 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
59 int i, ret = AVERROR(ENOMEM);
61 AVDictionary *mpegts_muxer_options = NULL;
63 if (!mpegts_format || !rtp_format)
64 return AVERROR(ENOSYS);
65 mpegts_ctx = avformat_alloc_context();
67 return AVERROR(ENOMEM);
68 chain->pkt = av_packet_alloc();
71 mpegts_ctx->oformat = mpegts_format;
72 mpegts_ctx->max_delay = s->max_delay;
73 av_dict_copy(&mpegts_ctx->metadata, s->metadata, 0);
74 for (i = 0; i < s->nb_streams; i++) {
75 AVStream* st = avformat_new_stream(mpegts_ctx, NULL);
78 st->time_base = s->streams[i]->time_base;
79 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
80 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
82 if ((ret = avio_open_dyn_buf(&mpegts_ctx->pb)) < 0)
85 av_dict_copy(&mpegts_muxer_options, chain->mpegts_muxer_options, 0);
87 if ((ret = avformat_write_header(mpegts_ctx, &mpegts_muxer_options)) < 0)
89 for (i = 0; i < s->nb_streams; i++)
90 s->streams[i]->time_base = mpegts_ctx->streams[i]->time_base;
92 chain->mpegts_ctx = mpegts_ctx;
95 rtp_ctx = avformat_alloc_context();
97 ret = AVERROR(ENOMEM);
100 rtp_ctx->oformat = rtp_format;
101 st = avformat_new_stream(rtp_ctx, NULL);
103 ret = AVERROR(ENOMEM);
106 st->time_base.num = 1;
107 st->time_base.den = 90000;
108 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
110 if ((ret = avformat_write_header(rtp_ctx, NULL)) < 0)
112 chain->rtp_ctx = rtp_ctx;
118 ffio_free_dyn_buf(&mpegts_ctx->pb);
119 av_dict_free(&mpegts_ctx->metadata);
120 av_dict_free(&mpegts_muxer_options);
121 avformat_free_context(mpegts_ctx);
123 avformat_free_context(rtp_ctx);
124 rtp_mpegts_write_close(s);
128 static int rtp_mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
130 MuxChain *chain = s->priv_data;
133 AVPacket *local_pkt = chain->pkt;
135 if (!chain->mpegts_ctx->pb) {
136 if ((ret = avio_open_dyn_buf(&chain->mpegts_ctx->pb)) < 0)
139 if ((ret = av_write_frame(chain->mpegts_ctx, pkt)) < 0)
141 size = avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf);
142 chain->mpegts_ctx->pb = NULL;
147 av_packet_unref(local_pkt);
148 local_pkt->data = buf;
149 local_pkt->size = size;
150 local_pkt->stream_index = 0;
151 if (pkt->pts != AV_NOPTS_VALUE)
152 local_pkt->pts = av_rescale_q(pkt->pts,
153 s->streams[pkt->stream_index]->time_base,
154 chain->rtp_ctx->streams[0]->time_base);
155 if (pkt->dts != AV_NOPTS_VALUE)
156 local_pkt->dts = av_rescale_q(pkt->dts,
157 s->streams[pkt->stream_index]->time_base,
158 chain->rtp_ctx->streams[0]->time_base);
159 ret = av_write_frame(chain->rtp_ctx, local_pkt);
165 #define OFFSET(x) offsetof(MuxChain, x)
166 #define E AV_OPT_FLAG_ENCODING_PARAM
167 static const AVOption options[] = {
168 { "mpegts_muxer_options", "set list of options for the MPEG-TS muxer", OFFSET(mpegts_muxer_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E },
172 static const AVClass rtp_mpegts_class = {
173 .class_name = "rtp_mpegts muxer",
174 .item_name = av_default_item_name,
176 .version = LIBAVUTIL_VERSION_INT,
179 AVOutputFormat ff_rtp_mpegts_muxer = {
180 .name = "rtp_mpegts",
181 .long_name = NULL_IF_CONFIG_SMALL("RTP/mpegts output format"),
182 .priv_data_size = sizeof(MuxChain),
183 .audio_codec = AV_CODEC_ID_AAC,
184 .video_codec = AV_CODEC_ID_MPEG4,
185 .write_header = rtp_mpegts_write_header,
186 .write_packet = rtp_mpegts_write_packet,
187 .write_trailer = rtp_mpegts_write_close,
188 .priv_class = &rtp_mpegts_class,