| /* |
| * RTP/mpegts muxer |
| * Copyright (c) 2011 Martin Storsjo |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/mathematics.h" |
| #include "libavutil/opt.h" |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "mux.h" |
| |
| typedef struct MuxChain { |
| const AVClass *class; |
| AVFormatContext *mpegts_ctx; |
| AVFormatContext *rtp_ctx; |
| AVPacket *pkt; |
| AVDictionary* mpegts_muxer_options; |
| AVDictionary* rtp_muxer_options; |
| } MuxChain; |
| |
| static int rtp_mpegts_write_close(AVFormatContext *s) |
| { |
| MuxChain *chain = s->priv_data; |
| |
| if (chain->mpegts_ctx) { |
| av_write_trailer(chain->mpegts_ctx); |
| ffio_free_dyn_buf(&chain->mpegts_ctx->pb); |
| avformat_free_context(chain->mpegts_ctx); |
| } |
| if (chain->rtp_ctx) { |
| av_write_trailer(chain->rtp_ctx); |
| avformat_free_context(chain->rtp_ctx); |
| } |
| |
| av_packet_free(&chain->pkt); |
| |
| return 0; |
| } |
| |
| static int rtp_mpegts_write_header(AVFormatContext *s) |
| { |
| MuxChain *chain = s->priv_data; |
| AVFormatContext *mpegts_ctx = NULL, *rtp_ctx = NULL; |
| const AVOutputFormat *mpegts_format = av_guess_format("mpegts", NULL, NULL); |
| const AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL); |
| int i, ret = AVERROR(ENOMEM); |
| AVStream *st; |
| AVDictionary *mpegts_muxer_options = NULL; |
| AVDictionary *rtp_muxer_options = NULL; |
| |
| if (!mpegts_format || !rtp_format) |
| return AVERROR(ENOSYS); |
| mpegts_ctx = avformat_alloc_context(); |
| if (!mpegts_ctx) |
| return AVERROR(ENOMEM); |
| chain->pkt = av_packet_alloc(); |
| if (!chain->pkt) |
| goto fail; |
| mpegts_ctx->oformat = mpegts_format; |
| mpegts_ctx->max_delay = s->max_delay; |
| av_dict_copy(&mpegts_ctx->metadata, s->metadata, 0); |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream* st = avformat_new_stream(mpegts_ctx, NULL); |
| if (!st) |
| goto fail; |
| st->time_base = s->streams[i]->time_base; |
| st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio; |
| st->id = s->streams[i]->id; |
| avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar); |
| } |
| if ((ret = avio_open_dyn_buf(&mpegts_ctx->pb)) < 0) |
| goto fail; |
| |
| av_dict_copy(&mpegts_muxer_options, chain->mpegts_muxer_options, 0); |
| |
| ret = avformat_write_header(mpegts_ctx, &mpegts_muxer_options); |
| av_dict_free(&mpegts_muxer_options); |
| if (ret < 0) |
| goto fail; |
| |
| for (i = 0; i < s->nb_streams; i++) |
| s->streams[i]->time_base = mpegts_ctx->streams[i]->time_base; |
| |
| chain->mpegts_ctx = mpegts_ctx; |
| mpegts_ctx = NULL; |
| |
| rtp_ctx = avformat_alloc_context(); |
| if (!rtp_ctx) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| rtp_ctx->oformat = rtp_format; |
| st = avformat_new_stream(rtp_ctx, NULL); |
| if (!st) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| st->time_base.num = 1; |
| st->time_base.den = 90000; |
| st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS; |
| rtp_ctx->pb = s->pb; |
| av_dict_copy(&rtp_muxer_options, chain->rtp_muxer_options, 0); |
| ret = avformat_write_header(rtp_ctx, &rtp_muxer_options); |
| av_dict_free(&rtp_muxer_options); |
| if (ret < 0) |
| goto fail; |
| |
| chain->rtp_ctx = rtp_ctx; |
| |
| return 0; |
| |
| fail: |
| if (mpegts_ctx) { |
| ffio_free_dyn_buf(&mpegts_ctx->pb); |
| av_dict_free(&mpegts_ctx->metadata); |
| avformat_free_context(mpegts_ctx); |
| } |
| avformat_free_context(rtp_ctx); |
| rtp_mpegts_write_close(s); |
| return ret; |
| } |
| |
| static int rtp_mpegts_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| MuxChain *chain = s->priv_data; |
| int ret = 0, size; |
| uint8_t *buf; |
| AVPacket *local_pkt = chain->pkt; |
| |
| if (!chain->mpegts_ctx->pb) { |
| if ((ret = avio_open_dyn_buf(&chain->mpegts_ctx->pb)) < 0) |
| return ret; |
| } |
| if ((ret = av_write_frame(chain->mpegts_ctx, pkt)) < 0) |
| return ret; |
| size = avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf); |
| chain->mpegts_ctx->pb = NULL; |
| if (size == 0) { |
| av_free(buf); |
| return 0; |
| } |
| av_packet_unref(local_pkt); |
| local_pkt->data = buf; |
| local_pkt->size = size; |
| local_pkt->stream_index = 0; |
| if (pkt->pts != AV_NOPTS_VALUE) |
| local_pkt->pts = av_rescale_q(pkt->pts, |
| s->streams[pkt->stream_index]->time_base, |
| chain->rtp_ctx->streams[0]->time_base); |
| if (pkt->dts != AV_NOPTS_VALUE) |
| local_pkt->dts = av_rescale_q(pkt->dts, |
| s->streams[pkt->stream_index]->time_base, |
| chain->rtp_ctx->streams[0]->time_base); |
| ret = av_write_frame(chain->rtp_ctx, local_pkt); |
| av_free(buf); |
| |
| return ret; |
| } |
| |
| #define OFFSET(x) offsetof(MuxChain, x) |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| { "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 }, |
| { "rtp_muxer_options", "set list of options for the RTP muxer", OFFSET(rtp_muxer_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E }, |
| { NULL }, |
| }; |
| |
| static const AVClass rtp_mpegts_class = { |
| .class_name = "rtp_mpegts muxer", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| const FFOutputFormat ff_rtp_mpegts_muxer = { |
| .p.name = "rtp_mpegts", |
| .p.long_name = NULL_IF_CONFIG_SMALL("RTP/mpegts output format"), |
| .priv_data_size = sizeof(MuxChain), |
| .p.audio_codec = AV_CODEC_ID_AAC, |
| .p.video_codec = AV_CODEC_ID_MPEG4, |
| .write_header = rtp_mpegts_write_header, |
| .write_packet = rtp_mpegts_write_packet, |
| .write_trailer = rtp_mpegts_write_close, |
| .p.priv_class = &rtp_mpegts_class, |
| }; |