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abb810db03
While it strictly isn't necessary to copy the time base (since
any use of it is scaled in ff_write_chained), it still is better
to signal the actual time base to the caller, avoiding one
unnecessary rescaling. This also lets the caller know what the
actual internal time base is, in case that is useful info
for some caller.
This reverts commit 397ffde115.
Signed-off-by: Martin Storsjö <martin@martin.st>
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/*
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* RTP muxer chaining code
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* Copyright (c) 2010 Martin Storsjo
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "avio_internal.h"
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#include "rtpenc_chain.h"
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#include "avio_internal.h"
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#include "rtp.h"
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#include "libavutil/opt.h"
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int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
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AVStream *st, URLContext *handle, int packet_size,
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int idx)
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{
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AVFormatContext *rtpctx = NULL;
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int ret;
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AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
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uint8_t *rtpflags;
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AVDictionary *opts = NULL;
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if (!rtp_format) {
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ret = AVERROR(ENOSYS);
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goto fail;
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}
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/* Allocate an AVFormatContext for each output stream */
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rtpctx = avformat_alloc_context();
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if (!rtpctx) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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rtpctx->oformat = rtp_format;
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if (!avformat_new_stream(rtpctx, NULL)) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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/* Pass the interrupt callback on */
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rtpctx->interrupt_callback = s->interrupt_callback;
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/* Copy the max delay setting; the rtp muxer reads this. */
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rtpctx->max_delay = s->max_delay;
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/* Copy other stream parameters. */
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rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
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/* Get the payload type from the codec */
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if (st->id < RTP_PT_PRIVATE)
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rtpctx->streams[0]->id =
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ff_rtp_get_payload_type(s, st->codec, idx);
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else
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rtpctx->streams[0]->id = st->id;
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if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)
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av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);
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/* Set the synchronized start time. */
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rtpctx->start_time_realtime = s->start_time_realtime;
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avcodec_copy_context(rtpctx->streams[0]->codec, st->codec);
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if (handle) {
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ret = ffio_fdopen(&rtpctx->pb, handle);
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if (ret < 0)
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ffurl_close(handle);
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} else
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ret = ffio_open_dyn_packet_buf(&rtpctx->pb, packet_size);
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if (!ret)
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ret = avformat_write_header(rtpctx, &opts);
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av_dict_free(&opts);
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if (ret) {
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if (handle && rtpctx->pb) {
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avio_close(rtpctx->pb);
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} else if (rtpctx->pb) {
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uint8_t *ptr;
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avio_close_dyn_buf(rtpctx->pb, &ptr);
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av_free(ptr);
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}
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avformat_free_context(rtpctx);
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return ret;
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}
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/* Copy the RTP AVStream timebase back to the original AVStream */
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st->time_base = rtpctx->streams[0]->time_base;
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*out = rtpctx;
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return 0;
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fail:
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av_free(rtpctx);
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if (handle)
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ffurl_close(handle);
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return ret;
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}
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