3 * Copyright (c) 2010 Martin Storsjo
5 * This file is part of FFmpeg.
7 * FFmpeg 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.
12 * FFmpeg 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include <sys/select.h>
30 #include <libavutil/intreadwrite.h>
32 static int rtsp_write_record(AVFormatContext *s)
34 RTSPState *rt = s->priv_data;
35 RTSPMessageHeader reply1, *reply = &reply1;
38 snprintf(cmd, sizeof(cmd),
39 "Range: npt=%0.3f-\r\n",
41 ff_rtsp_send_cmd(s, "RECORD", rt->control_uri, cmd, reply, NULL);
42 if (reply->status_code != RTSP_STATUS_OK)
44 rt->state = RTSP_STATE_STREAMING;
48 static int rtsp_write_header(AVFormatContext *s)
50 RTSPState *rt = s->priv_data;
53 ret = ff_rtsp_connect(s);
57 if (rtsp_write_record(s) < 0) {
58 ff_rtsp_close_streams(s);
59 url_close(rt->rtsp_hd);
60 return AVERROR_INVALIDDATA;
65 static int tcp_write_packet(AVFormatContext *s, RTSPStream *rtsp_st)
67 RTSPState *rt = s->priv_data;
68 AVFormatContext *rtpctx = rtsp_st->transport_priv;
71 uint8_t interleave_header[4];
73 size = url_close_dyn_buf(rtpctx->pb, &buf);
76 uint32_t packet_len = AV_RB32(ptr);
80 if (packet_len > size || packet_len < 2)
82 if (ptr[1] >= 200 && ptr[1] <= 204)
83 id = rtsp_st->interleaved_max; /* RTCP */
85 id = rtsp_st->interleaved_min; /* RTP */
86 interleave_header[0] = '$';
87 interleave_header[1] = id;
88 AV_WB16(interleave_header + 2, packet_len);
89 url_write(rt->rtsp_hd, interleave_header, 4);
90 url_write(rt->rtsp_hd, ptr, packet_len);
95 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
99 static int rtsp_write_packet(AVFormatContext *s, AVPacket *pkt)
101 RTSPState *rt = s->priv_data;
106 AVFormatContext *rtpctx;
110 tcp_fd = url_get_file_handle(rt->rtsp_hd);
114 FD_SET(tcp_fd, &rfds);
117 n = select(tcp_fd + 1, &rfds, NULL, NULL, &tv);
120 if (FD_ISSET(tcp_fd, &rfds)) {
121 RTSPMessageHeader reply;
123 /* Don't let ff_rtsp_read_reply handle interleaved packets,
124 * since it would block and wait for an RTSP reply on the socket
125 * (which may not be coming any time soon) if it handles
126 * interleaved packets internally. */
127 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
129 return AVERROR(EPIPE);
131 ff_rtsp_skip_packet(s);
132 /* XXX: parse message */
133 if (rt->state != RTSP_STATE_STREAMING)
134 return AVERROR(EPIPE);
138 if (pkt->stream_index < 0 || pkt->stream_index >= rt->nb_rtsp_streams)
139 return AVERROR_INVALIDDATA;
140 rtsp_st = rt->rtsp_streams[pkt->stream_index];
141 rtpctx = rtsp_st->transport_priv;
143 /* Use a local packet for writing to the chained muxer, otherwise
144 * the internal stream_index = 0 becomes visible to the muxer user. */
146 local_pkt.stream_index = 0;
147 ret = av_write_frame(rtpctx, &local_pkt);
148 /* av_write_frame does all the RTP packetization. If using TCP as
149 * transport, rtpctx->pb is only a dyn_packet_buf that queues up the
150 * packets, so we need to send them out on the TCP connection separately.
152 if (!ret && rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP)
153 ret = tcp_write_packet(s, rtsp_st);
157 static int rtsp_write_close(AVFormatContext *s)
159 RTSPState *rt = s->priv_data;
161 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
163 ff_rtsp_close_streams(s);
164 url_close(rt->rtsp_hd);
169 AVOutputFormat rtsp_muxer = {
171 NULL_IF_CONFIG_SMALL("RTSP output format"),
180 .flags = AVFMT_NOFILE | AVFMT_GLOBALHEADER,