diff options
Diffstat (limited to 'libavformat/rtpenc_mpegts.c')
-rw-r--r-- | libavformat/rtpenc_mpegts.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/libavformat/rtpenc_mpegts.c b/libavformat/rtpenc_mpegts.c new file mode 100644 index 0000000..4e243f0 --- /dev/null +++ b/libavformat/rtpenc_mpegts.c @@ -0,0 +1,165 @@ +/* + * RTP/mpegts muxer + * Copyright (c) 2011 Martin Storsjo + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/mathematics.h" +#include "avformat.h" + +struct MuxChain { + AVFormatContext *mpegts_ctx; + AVFormatContext *rtp_ctx; +}; + +static int rtp_mpegts_write_close(AVFormatContext *s) +{ + struct MuxChain *chain = s->priv_data; + + if (chain->mpegts_ctx) { + if (!chain->mpegts_ctx->pb) + avio_open_dyn_buf(&chain->mpegts_ctx->pb); + if (chain->mpegts_ctx->pb) { + uint8_t *buf; + av_write_trailer(chain->mpegts_ctx); + avio_close_dyn_buf(chain->mpegts_ctx->pb, &buf); + av_free(buf); + } + avformat_free_context(chain->mpegts_ctx); + } + if (chain->rtp_ctx) { + av_write_trailer(chain->rtp_ctx); + avformat_free_context(chain->rtp_ctx); + } + return 0; +} + +static int rtp_mpegts_write_header(AVFormatContext *s) +{ + struct MuxChain *chain = s->priv_data; + AVFormatContext *mpegts_ctx = NULL, *rtp_ctx = NULL; + AVOutputFormat *mpegts_format = av_guess_format("mpegts", NULL, NULL); + AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL); + int i, ret = AVERROR(ENOMEM); + AVStream *st; + + if (!mpegts_format || !rtp_format) + return AVERROR(ENOSYS); + mpegts_ctx = avformat_alloc_context(); + if (!mpegts_ctx) + return AVERROR(ENOMEM); + mpegts_ctx->oformat = mpegts_format; + mpegts_ctx->max_delay = s->max_delay; + 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; + avcodec_copy_context(st->codec, s->streams[i]->codec); + } + if ((ret = avio_open_dyn_buf(&mpegts_ctx->pb)) < 0) + goto fail; + if ((ret = avformat_write_header(mpegts_ctx, NULL)) < 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); + st->time_base.num = 1; + st->time_base.den = 90000; + st->codec->codec_id = AV_CODEC_ID_MPEG2TS; + chain->rtp_ctx = rtp_ctx; + rtp_ctx->pb = s->pb; + if ((ret = avformat_write_header(rtp_ctx, NULL)) < 0) + goto fail; + rtp_ctx = NULL; + + return 0; + +fail: + if (mpegts_ctx) { + if (mpegts_ctx->pb) { + uint8_t *buf; + avio_close_dyn_buf(mpegts_ctx->pb, &buf); + av_free(buf); + } + avformat_free_context(mpegts_ctx); + } + if (rtp_ctx) + avformat_free_context(rtp_ctx); + rtp_mpegts_write_close(s); + return ret; +} + +static int rtp_mpegts_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + struct MuxChain *chain = s->priv_data; + int ret = 0, size; + uint8_t *buf; + AVPacket local_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_init_packet(&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; +} + +AVOutputFormat ff_rtp_mpegts_muxer = { + .name = "rtp_mpegts", + .long_name = NULL_IF_CONFIG_SMALL("RTP/mpegts output format"), + .priv_data_size = sizeof(struct MuxChain), + .audio_codec = AV_CODEC_ID_AAC, + .video_codec = AV_CODEC_ID_MPEG4, + .write_header = rtp_mpegts_write_header, + .write_packet = rtp_mpegts_write_packet, + .write_trailer = rtp_mpegts_write_close, +}; |