Originally committed as revision 25601 to svn://svn.ffmpeg.org/ffmpeg/trunkoldabi
Martin Storsjö
15 years ago
parent
c2688f3ac8
commit
0526c6f7c7
4 changed files with 396 additions and 352 deletions
@ -0,0 +1,364 @@ |
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/*
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* RTSP demuxer |
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* Copyright (c) 2002 Fabrice Bellard |
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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 "libavutil/avstring.h" |
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "network.h" |
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#include "os_support.h" |
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#include "rtsp.h" |
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#include "rdt.h" |
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//#define DEBUG
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//#define DEBUG_RTP_TCP
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static int rtsp_read_play(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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int i; |
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char cmd[1024]; |
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av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state); |
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rt->nb_byes = 0; |
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if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { |
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if (rt->state == RTSP_STATE_PAUSED) { |
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cmd[0] = 0; |
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} else { |
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snprintf(cmd, sizeof(cmd), |
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"Range: npt=%0.3f-\r\n", |
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(double)rt->seek_timestamp / AV_TIME_BASE); |
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} |
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ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL); |
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if (reply->status_code != RTSP_STATUS_OK) { |
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return -1; |
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} |
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if (rt->transport == RTSP_TRANSPORT_RTP) { |
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for (i = 0; i < rt->nb_rtsp_streams; i++) { |
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RTSPStream *rtsp_st = rt->rtsp_streams[i]; |
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RTPDemuxContext *rtpctx = rtsp_st->transport_priv; |
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AVStream *st = NULL; |
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if (!rtpctx) |
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continue; |
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if (rtsp_st->stream_index >= 0) |
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st = s->streams[rtsp_st->stream_index]; |
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ff_rtp_reset_packet_queue(rtpctx); |
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if (reply->range_start != AV_NOPTS_VALUE) { |
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rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE; |
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rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE; |
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if (st) |
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rtpctx->range_start_offset = |
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av_rescale_q(reply->range_start, AV_TIME_BASE_Q, |
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st->time_base); |
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} |
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} |
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} |
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} |
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rt->state = RTSP_STATE_STREAMING; |
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return 0; |
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} |
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int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply) |
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{ |
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RTSPState *rt = s->priv_data; |
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char cmd[1024]; |
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unsigned char *content = NULL; |
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int ret; |
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/* describe the stream */ |
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snprintf(cmd, sizeof(cmd), |
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"Accept: application/sdp\r\n"); |
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if (rt->server_type == RTSP_SERVER_REAL) { |
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/**
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* The Require: attribute is needed for proper streaming from |
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* Realmedia servers. |
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*/ |
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av_strlcat(cmd, |
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"Require: com.real.retain-entity-for-setup\r\n", |
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sizeof(cmd)); |
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} |
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ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content); |
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if (!content) |
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return AVERROR_INVALIDDATA; |
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if (reply->status_code != RTSP_STATUS_OK) { |
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av_freep(&content); |
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return AVERROR_INVALIDDATA; |
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} |
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av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content); |
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/* now we got the SDP description, we parse it */ |
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ret = ff_sdp_parse(s, (const char *)content); |
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av_freep(&content); |
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if (ret < 0) |
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return AVERROR_INVALIDDATA; |
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return 0; |
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} |
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static int rtsp_probe(AVProbeData *p) |
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{ |
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if (av_strstart(p->filename, "rtsp:", NULL)) |
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return AVPROBE_SCORE_MAX; |
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return 0; |
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} |
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static int rtsp_read_header(AVFormatContext *s, |
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AVFormatParameters *ap) |
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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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rt->real_setup_cache = av_mallocz(2 * s->nb_streams * sizeof(*rt->real_setup_cache)); |
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if (!rt->real_setup_cache) |
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return AVERROR(ENOMEM); |
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rt->real_setup = rt->real_setup_cache + s->nb_streams * sizeof(*rt->real_setup); |
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if (ap->initial_pause) { |
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/* do not start immediately */ |
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} else { |
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if (rtsp_read_play(s) < 0) { |
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ff_rtsp_close_streams(s); |
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ff_rtsp_close_connections(s); |
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return AVERROR_INVALIDDATA; |
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} |
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} |
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return 0; |
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} |
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int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, |
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uint8_t *buf, int buf_size) |
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{ |
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RTSPState *rt = s->priv_data; |
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int id, len, i, ret; |
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RTSPStream *rtsp_st; |
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#ifdef DEBUG_RTP_TCP |
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dprintf(s, "tcp_read_packet:\n"); |
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#endif |
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redo: |
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for (;;) { |
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RTSPMessageHeader reply; |
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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 ret; |
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if (ret == 1) /* received '$' */ |
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break; |
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/* XXX: parse message */ |
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if (rt->state != RTSP_STATE_STREAMING) |
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return 0; |
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} |
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ret = url_read_complete(rt->rtsp_hd, buf, 3); |
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if (ret != 3) |
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return -1; |
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id = buf[0]; |
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len = AV_RB16(buf + 1); |
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#ifdef DEBUG_RTP_TCP |
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dprintf(s, "id=%d len=%d\n", id, len); |
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#endif |
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if (len > buf_size || len < 12) |
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goto redo; |
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/* get the data */ |
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ret = url_read_complete(rt->rtsp_hd, buf, len); |
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if (ret != len) |
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return -1; |
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if (rt->transport == RTSP_TRANSPORT_RDT && |
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ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0) |
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return -1; |
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/* find the matching stream */ |
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for (i = 0; i < rt->nb_rtsp_streams; i++) { |
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rtsp_st = rt->rtsp_streams[i]; |
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if (id >= rtsp_st->interleaved_min && |
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id <= rtsp_st->interleaved_max) |
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goto found; |
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} |
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goto redo; |
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found: |
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*prtsp_st = rtsp_st; |
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return len; |
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} |
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static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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RTSPState *rt = s->priv_data; |
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int ret; |
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RTSPMessageHeader reply1, *reply = &reply1; |
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char cmd[1024]; |
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if (rt->server_type == RTSP_SERVER_REAL) { |
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int i; |
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for (i = 0; i < s->nb_streams; i++) |
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rt->real_setup[i] = s->streams[i]->discard; |
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if (!rt->need_subscription) { |
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if (memcmp (rt->real_setup, rt->real_setup_cache, |
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sizeof(enum AVDiscard) * s->nb_streams)) { |
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snprintf(cmd, sizeof(cmd), |
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"Unsubscribe: %s\r\n", |
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rt->last_subscription); |
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ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, |
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cmd, reply, NULL); |
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if (reply->status_code != RTSP_STATUS_OK) |
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return AVERROR_INVALIDDATA; |
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rt->need_subscription = 1; |
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} |
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} |
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if (rt->need_subscription) { |
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int r, rule_nr, first = 1; |
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memcpy(rt->real_setup_cache, rt->real_setup, |
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sizeof(enum AVDiscard) * s->nb_streams); |
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rt->last_subscription[0] = 0; |
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snprintf(cmd, sizeof(cmd), |
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"Subscribe: "); |
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for (i = 0; i < rt->nb_rtsp_streams; i++) { |
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rule_nr = 0; |
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for (r = 0; r < s->nb_streams; r++) { |
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if (s->streams[r]->priv_data == rt->rtsp_streams[i]) { |
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if (s->streams[r]->discard != AVDISCARD_ALL) { |
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if (!first) |
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av_strlcat(rt->last_subscription, ",", |
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sizeof(rt->last_subscription)); |
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ff_rdt_subscribe_rule( |
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rt->last_subscription, |
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sizeof(rt->last_subscription), i, rule_nr); |
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first = 0; |
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} |
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rule_nr++; |
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} |
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} |
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} |
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av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription); |
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ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, |
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cmd, reply, NULL); |
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if (reply->status_code != RTSP_STATUS_OK) |
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return AVERROR_INVALIDDATA; |
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rt->need_subscription = 0; |
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if (rt->state == RTSP_STATE_STREAMING) |
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rtsp_read_play (s); |
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} |
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} |
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ret = ff_rtsp_fetch_packet(s, pkt); |
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if (ret < 0) |
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return ret; |
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/* send dummy request to keep TCP connection alive */ |
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if ((av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) { |
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if (rt->server_type == RTSP_SERVER_WMS) { |
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ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL); |
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} else { |
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ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL); |
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} |
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} |
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return 0; |
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} |
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/* pause the stream */ |
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static int rtsp_read_pause(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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if (rt->state != RTSP_STATE_STREAMING) |
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return 0; |
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else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { |
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ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL); |
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if (reply->status_code != RTSP_STATUS_OK) { |
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return -1; |
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} |
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} |
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rt->state = RTSP_STATE_PAUSED; |
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return 0; |
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} |
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static int rtsp_read_seek(AVFormatContext *s, int stream_index, |
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int64_t timestamp, int flags) |
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{ |
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RTSPState *rt = s->priv_data; |
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rt->seek_timestamp = av_rescale_q(timestamp, |
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s->streams[stream_index]->time_base, |
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AV_TIME_BASE_Q); |
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switch(rt->state) { |
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default: |
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case RTSP_STATE_IDLE: |
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break; |
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case RTSP_STATE_STREAMING: |
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if (rtsp_read_pause(s) != 0) |
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return -1; |
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rt->state = RTSP_STATE_SEEKING; |
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if (rtsp_read_play(s) != 0) |
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return -1; |
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break; |
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case RTSP_STATE_PAUSED: |
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rt->state = RTSP_STATE_IDLE; |
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break; |
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} |
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return 0; |
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} |
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static int rtsp_read_close(AVFormatContext *s) |
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{ |
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RTSPState *rt = s->priv_data; |
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#if 0 |
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/* NOTE: it is valid to flush the buffer here */ |
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if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) { |
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url_fclose(&rt->rtsp_gb); |
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} |
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#endif |
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ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL); |
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ff_rtsp_close_streams(s); |
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ff_rtsp_close_connections(s); |
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ff_network_close(); |
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rt->real_setup = NULL; |
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av_freep(&rt->real_setup_cache); |
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return 0; |
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} |
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AVInputFormat rtsp_demuxer = { |
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"rtsp", |
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NULL_IF_CONFIG_SMALL("RTSP input format"), |
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sizeof(RTSPState), |
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rtsp_probe, |
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rtsp_read_header, |
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rtsp_read_packet, |
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rtsp_read_close, |
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rtsp_read_seek, |
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.flags = AVFMT_NOFILE, |
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.read_play = rtsp_read_play, |
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.read_pause = rtsp_read_pause, |
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}; |
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