yading@11: /*
yading@11:  * RTP muxer chaining code
yading@11:  * Copyright (c) 2010 Martin Storsjo
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "avformat.h"
yading@11: #include "avio_internal.h"
yading@11: #include "rtpenc_chain.h"
yading@11: #include "avio_internal.h"
yading@11: #include "rtp.h"
yading@11: #include "libavutil/opt.h"
yading@11: 
yading@11: int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
yading@11:                           AVStream *st, URLContext *handle, int packet_size,
yading@11:                           int idx)
yading@11: {
yading@11:     AVFormatContext *rtpctx = NULL;
yading@11:     int ret;
yading@11:     AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
yading@11:     uint8_t *rtpflags;
yading@11:     AVDictionary *opts = NULL;
yading@11: 
yading@11:     if (!rtp_format) {
yading@11:         ret = AVERROR(ENOSYS);
yading@11:         goto fail;
yading@11:     }
yading@11: 
yading@11:     /* Allocate an AVFormatContext for each output stream */
yading@11:     rtpctx = avformat_alloc_context();
yading@11:     if (!rtpctx) {
yading@11:         ret = AVERROR(ENOMEM);
yading@11:         goto fail;
yading@11:     }
yading@11: 
yading@11:     rtpctx->oformat = rtp_format;
yading@11:     if (!avformat_new_stream(rtpctx, NULL)) {
yading@11:         ret = AVERROR(ENOMEM);
yading@11:         goto fail;
yading@11:     }
yading@11:     /* Pass the interrupt callback on */
yading@11:     rtpctx->interrupt_callback = s->interrupt_callback;
yading@11:     /* Copy the max delay setting; the rtp muxer reads this. */
yading@11:     rtpctx->max_delay = s->max_delay;
yading@11:     /* Copy other stream parameters. */
yading@11:     rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
yading@11:     rtpctx->flags |= s->flags & AVFMT_FLAG_MP4A_LATM;
yading@11: 
yading@11:     /* Get the payload type from the codec */
yading@11:     if (st->id < RTP_PT_PRIVATE)
yading@11:         rtpctx->streams[0]->id =
yading@11:             ff_rtp_get_payload_type(s, st->codec, idx);
yading@11:     else
yading@11:         rtpctx->streams[0]->id = st->id;
yading@11: 
yading@11: 
yading@11:     if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)
yading@11:         av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);
yading@11: 
yading@11:     /* Set the synchronized start time. */
yading@11:     rtpctx->start_time_realtime = s->start_time_realtime;
yading@11: 
yading@11:     avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
yading@11: 
yading@11:     if (handle) {
yading@11:         ffio_fdopen(&rtpctx->pb, handle);
yading@11:     } else
yading@11:         ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
yading@11:     ret = avformat_write_header(rtpctx, &opts);
yading@11:     av_dict_free(&opts);
yading@11: 
yading@11:     if (ret) {
yading@11:         if (handle) {
yading@11:             avio_close(rtpctx->pb);
yading@11:         } else {
yading@11:             uint8_t *ptr;
yading@11:             avio_close_dyn_buf(rtpctx->pb, &ptr);
yading@11:             av_free(ptr);
yading@11:         }
yading@11:         avformat_free_context(rtpctx);
yading@11:         return ret;
yading@11:     }
yading@11: 
yading@11:     *out = rtpctx;
yading@11:     return 0;
yading@11: 
yading@11: fail:
yading@11:     av_free(rtpctx);
yading@11:     if (handle)
yading@11:         ffurl_close(handle);
yading@11:     return ret;
yading@11: }