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146 lines
3.9 KiB
146 lines
3.9 KiB
/* |
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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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int ret; |
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tcp_fd = url_get_file_handle(rt->rtsp_hd); |
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while (1) { |
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FD_ZERO(&rfds); |
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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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break; |
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if (FD_ISSET(tcp_fd, &rfds)) { |
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RTSPMessageHeader reply; |
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/* Don't let ff_rtsp_read_reply handle interleaved packets, |
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* since it would block and wait for an RTSP reply on the socket |
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* (which may not be coming any time soon) if it handles |
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* interleaved packets internally. */ |
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ret = ff_rtsp_read_reply(s, &reply, NULL, 1); |
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if (ret < 0) |
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return AVERROR(EPIPE); |
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if (ret == 1) |
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ff_rtsp_skip_packet(s); |
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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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