mirror of
https://github.com/FFmpeg/FFmpeg.git
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137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/*
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* RTSP muxer
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* Copyright (c) 2010 Martin Storsjo
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 <sys/time.h>
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#if HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include "network.h"
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#include "rtsp.h"
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static int rtsp_write_record(AVFormatContext *s)
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{
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RTSPState *rt = s->priv_data;
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RTSPMessageHeader reply1, *reply = &reply1;
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char cmd[1024];
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snprintf(cmd, sizeof(cmd),
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"RECORD %s RTSP/1.0\r\n"
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"Range: npt=%0.3f-\r\n",
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rt->control_uri,
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(double) 0);
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ff_rtsp_send_cmd(s, cmd, reply, NULL);
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if (reply->status_code != RTSP_STATUS_OK)
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return -1;
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rt->state = RTSP_STATE_STREAMING;
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return 0;
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}
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static int rtsp_write_header(AVFormatContext *s)
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{
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RTSPState *rt = s->priv_data;
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int ret;
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ret = ff_rtsp_connect(s);
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if (ret)
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return ret;
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if (rtsp_write_record(s) < 0) {
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ff_rtsp_close_streams(s);
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url_close(rt->rtsp_hd);
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static int rtsp_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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RTSPState *rt = s->priv_data;
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RTSPStream *rtsp_st;
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fd_set rfds;
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int n, tcp_fd;
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struct timeval tv;
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AVFormatContext *rtpctx;
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AVPacket local_pkt;
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FD_ZERO(&rfds);
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tcp_fd = url_get_file_handle(rt->rtsp_hd);
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FD_SET(tcp_fd, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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n = select(tcp_fd + 1, &rfds, NULL, NULL, &tv);
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if (n > 0) {
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if (FD_ISSET(tcp_fd, &rfds)) {
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RTSPMessageHeader reply;
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if (ff_rtsp_read_reply(s, &reply, NULL, 0) < 0)
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return AVERROR(EPIPE);
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/* XXX: parse message */
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if (rt->state != RTSP_STATE_STREAMING)
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return AVERROR(EPIPE);
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}
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}
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if (pkt->stream_index < 0 || pkt->stream_index >= rt->nb_rtsp_streams)
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return AVERROR_INVALIDDATA;
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rtsp_st = rt->rtsp_streams[pkt->stream_index];
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rtpctx = rtsp_st->transport_priv;
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/* Use a local packet for writing to the chained muxer, otherwise
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* the internal stream_index = 0 becomes visible to the muxer user. */
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local_pkt = *pkt;
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local_pkt.stream_index = 0;
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return av_write_frame(rtpctx, &local_pkt);
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}
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static int rtsp_write_close(AVFormatContext *s)
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{
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RTSPState *rt = s->priv_data;
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char cmd[1024];
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snprintf(cmd, sizeof(cmd),
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"TEARDOWN %s RTSP/1.0\r\n",
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rt->control_uri);
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ff_rtsp_send_cmd_async(s, cmd);
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ff_rtsp_close_streams(s);
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url_close(rt->rtsp_hd);
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ff_network_close();
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return 0;
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}
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AVOutputFormat rtsp_muxer = {
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"rtsp",
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NULL_IF_CONFIG_SMALL("RTSP output format"),
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NULL,
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NULL,
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sizeof(RTSPState),
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CODEC_ID_PCM_MULAW,
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CODEC_ID_NONE,
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rtsp_write_header,
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rtsp_write_packet,
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rtsp_write_close,
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.flags = AVFMT_NOFILE | AVFMT_GLOBALHEADER,
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};
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