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>
31 #include <libavutil/intreadwrite.h>
33 static int rtsp_write_record(AVFormatContext *s)
35 RTSPState *rt = s->priv_data;
36 RTSPMessageHeader reply1, *reply = &reply1;
39 snprintf(cmd, sizeof(cmd),
40 "Range: npt=%0.3f-\r\n",
42 ff_rtsp_send_cmd(s, "RECORD", rt->control_uri, cmd, reply, NULL);
43 if (reply->status_code != RTSP_STATUS_OK)
45 rt->state = RTSP_STATE_STREAMING;
49 static int rtsp_write_header(AVFormatContext *s)
51 RTSPState *rt = s->priv_data;
54 ret = ff_rtsp_connect(s);
58 if (rtsp_write_record(s) < 0) {
59 ff_rtsp_close_streams(s);
60 url_close(rt->rtsp_hd);
61 return AVERROR_INVALIDDATA;
66 static int tcp_write_packet(AVFormatContext *s, RTSPStream *rtsp_st)
68 RTSPState *rt = s->priv_data;
69 AVFormatContext *rtpctx = rtsp_st->transport_priv;
72 uint8_t interleave_header[4];
74 size = url_close_dyn_buf(rtpctx->pb, &buf);
77 uint32_t packet_len = AV_RB32(ptr);
81 if (packet_len > size || packet_len < 2)
83 if (ptr[1] >= 200 && ptr[1] <= 204)
84 id = rtsp_st->interleaved_max; /* RTCP */
86 id = rtsp_st->interleaved_min; /* RTP */
87 interleave_header[0] = '$';
88 interleave_header[1] = id;
89 AV_WB16(interleave_header + 2, packet_len);
90 url_write(rt->rtsp_hd, interleave_header, 4);
91 url_write(rt->rtsp_hd, ptr, packet_len);
96 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
100 static int rtsp_write_packet(AVFormatContext *s, AVPacket *pkt)
102 RTSPState *rt = s->priv_data;
107 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 ret = ff_write_chained(rtpctx, 0, pkt, s);
144 /* ff_write_chained does all the RTP packetization. If using TCP as
145 * transport, rtpctx->pb is only a dyn_packet_buf that queues up the
146 * packets, so we need to send them out on the TCP connection separately.
148 if (!ret && rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP)
149 ret = tcp_write_packet(s, rtsp_st);
153 static int rtsp_write_close(AVFormatContext *s)
155 RTSPState *rt = s->priv_data;
157 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
159 ff_rtsp_close_streams(s);
160 url_close(rt->rtsp_hd);
165 AVOutputFormat rtsp_muxer = {
167 NULL_IF_CONFIG_SMALL("RTSP output format"),
176 .flags = AVFMT_NOFILE | AVFMT_GLOBALHEADER,