1/* 2 * RTP muxer chaining code 3 * Copyright (c) 2010 Martin Storsjo 4 * 5 * This file is part of Libav. 6 * 7 * Libav 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. 11 * 12 * Libav 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. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with Libav; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "avformat.h" 23#include "avio_internal.h" 24#include "rtpenc_chain.h" 25#include "avio_internal.h" 26#include "libavutil/opt.h" 27 28AVFormatContext *ff_rtp_chain_mux_open(AVFormatContext *s, AVStream *st, 29 URLContext *handle, int packet_size) 30{ 31 AVFormatContext *rtpctx; 32 int ret; 33 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL); 34 uint8_t *rtpflags; 35 AVDictionary *opts = NULL; 36 37 if (!rtp_format) 38 return NULL; 39 40 /* Allocate an AVFormatContext for each output stream */ 41 rtpctx = avformat_alloc_context(); 42 if (!rtpctx) 43 return NULL; 44 45 rtpctx->oformat = rtp_format; 46 if (!avformat_new_stream(rtpctx, NULL)) { 47 av_free(rtpctx); 48 return NULL; 49 } 50 /* Pass the interrupt callback on */ 51 rtpctx->interrupt_callback = s->interrupt_callback; 52 /* Copy the max delay setting; the rtp muxer reads this. */ 53 rtpctx->max_delay = s->max_delay; 54 /* Copy other stream parameters. */ 55 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio; 56 57 if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0) 58 av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL); 59 60 /* Set the synchronized start time. */ 61 rtpctx->start_time_realtime = s->start_time_realtime; 62 63 avcodec_copy_context(rtpctx->streams[0]->codec, st->codec); 64 65 if (handle) { 66 ffio_fdopen(&rtpctx->pb, handle); 67 } else 68 ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size); 69 ret = avformat_write_header(rtpctx, &opts); 70 av_dict_free(&opts); 71 72 if (ret) { 73 if (handle) { 74 avio_close(rtpctx->pb); 75 } else { 76 uint8_t *ptr; 77 avio_close_dyn_buf(rtpctx->pb, &ptr); 78 av_free(ptr); 79 } 80 avformat_free_context(rtpctx); 81 return NULL; 82 } 83 84 return rtpctx; 85} 86 87