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938 lines
32 KiB
938 lines
32 KiB
/* |
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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|
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#include "libavutil/avstring.h" |
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/random_seed.h" |
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#include "libavutil/time.h" |
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#include "avformat.h" |
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|
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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 "rtpproto.h" |
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#include "rtsp.h" |
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#include "rdt.h" |
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#include "url.h" |
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|
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static const struct RTSPStatusMessage { |
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enum RTSPStatusCode code; |
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const char *message; |
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} status_messages[] = { |
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{ RTSP_STATUS_OK, "OK" }, |
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{ RTSP_STATUS_METHOD, "Method Not Allowed" }, |
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{ RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" }, |
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{ RTSP_STATUS_SESSION, "Session Not Found" }, |
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{ RTSP_STATUS_STATE, "Method Not Valid in This State" }, |
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{ RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" }, |
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{ RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" }, |
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{ RTSP_STATUS_TRANSPORT, "Unsupported transport" }, |
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{ RTSP_STATUS_INTERNAL, "Internal Server Error" }, |
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{ RTSP_STATUS_SERVICE, "Service Unavailable" }, |
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{ RTSP_STATUS_VERSION, "RTSP Version not supported" }, |
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{ 0, "NULL" } |
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}; |
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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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|
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if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) |
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ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL); |
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|
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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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|
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static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize, |
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int *rbuflen) |
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{ |
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RTSPState *rt = s->priv_data; |
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int idx = 0; |
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int ret = 0; |
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*rbuflen = 0; |
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|
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do { |
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ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1); |
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if (ret <= 0) |
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return ret ? ret : AVERROR_EOF; |
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if (rbuf[idx] == '\r') { |
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/* Ignore */ |
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} else if (rbuf[idx] == '\n') { |
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rbuf[idx] = '\0'; |
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*rbuflen = idx; |
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return 0; |
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} else |
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idx++; |
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} while (idx < rbufsize); |
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av_log(s, AV_LOG_ERROR, "Message too long\n"); |
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return AVERROR(EIO); |
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} |
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|
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static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code, |
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const char *extracontent, uint16_t seq) |
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{ |
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RTSPState *rt = s->priv_data; |
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char message[4096]; |
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int index = 0; |
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while (status_messages[index].code) { |
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if (status_messages[index].code == code) { |
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snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n", |
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code, status_messages[index].message); |
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break; |
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} |
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index++; |
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} |
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if (!status_messages[index].code) |
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return AVERROR(EINVAL); |
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av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq); |
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av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT); |
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if (extracontent) |
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av_strlcat(message, extracontent, sizeof(message)); |
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av_strlcat(message, "\r\n", sizeof(message)); |
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av_dlog(s, "Sending response:\n%s", message); |
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ffurl_write(rt->rtsp_hd, message, strlen(message)); |
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|
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return 0; |
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} |
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|
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static inline int check_sessionid(AVFormatContext *s, |
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RTSPMessageHeader *request) |
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{ |
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RTSPState *rt = s->priv_data; |
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unsigned char *session_id = rt->session_id; |
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if (!session_id[0]) { |
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av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n"); |
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return 0; |
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} |
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if (strcmp(session_id, request->session_id)) { |
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av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n", |
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request->session_id); |
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rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq); |
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return AVERROR_STREAM_NOT_FOUND; |
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} |
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return 0; |
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} |
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|
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static inline int rtsp_read_request(AVFormatContext *s, |
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RTSPMessageHeader *request, |
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const char *method) |
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{ |
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RTSPState *rt = s->priv_data; |
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char rbuf[1024]; |
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int rbuflen, ret; |
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do { |
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ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); |
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if (ret) |
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return ret; |
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if (rbuflen > 1) { |
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av_dlog(s, "Parsing[%d]: %s\n", rbuflen, rbuf); |
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ff_rtsp_parse_line(request, rbuf, rt, method); |
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} |
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} while (rbuflen > 0); |
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if (request->seq != rt->seq + 1) { |
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av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n", |
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request->seq); |
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return AVERROR(EINVAL); |
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} |
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if (rt->session_id[0] && strcmp(method, "OPTIONS")) { |
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ret = check_sessionid(s, request); |
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if (ret) |
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return ret; |
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} |
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|
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return 0; |
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} |
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|
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static int rtsp_read_announce(AVFormatContext *s) |
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{ |
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RTSPState *rt = s->priv_data; |
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RTSPMessageHeader request = { 0 }; |
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char sdp[4096]; |
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int ret; |
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|
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ret = rtsp_read_request(s, &request, "ANNOUNCE"); |
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if (ret) |
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return ret; |
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rt->seq++; |
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if (strcmp(request.content_type, "application/sdp")) { |
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av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n", |
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request.content_type); |
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rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq); |
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return AVERROR_OPTION_NOT_FOUND; |
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} |
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if (request.content_length && request.content_length < sizeof(sdp) - 1) { |
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/* Read SDP */ |
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if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length) |
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< request.content_length) { |
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av_log(s, AV_LOG_ERROR, |
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"Unable to get complete SDP Description in ANNOUNCE\n"); |
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rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq); |
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return AVERROR(EIO); |
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} |
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sdp[request.content_length] = '\0'; |
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av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp); |
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ret = ff_sdp_parse(s, sdp); |
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if (ret) |
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return ret; |
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rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq); |
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return 0; |
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} |
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av_log(s, AV_LOG_ERROR, |
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"Content-Length header value exceeds sdp allocated buffer (4KB)\n"); |
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rtsp_send_reply(s, RTSP_STATUS_INTERNAL, |
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"Content-Length exceeds buffer size", request.seq); |
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return AVERROR(EIO); |
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} |
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|
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static int rtsp_read_options(AVFormatContext *s) |
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{ |
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RTSPState *rt = s->priv_data; |
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RTSPMessageHeader request = { 0 }; |
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int ret = 0; |
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|
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/* Parsing headers */ |
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ret = rtsp_read_request(s, &request, "OPTIONS"); |
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if (ret) |
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return ret; |
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rt->seq++; |
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/* Send Reply */ |
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rtsp_send_reply(s, RTSP_STATUS_OK, |
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"Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n", |
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request.seq); |
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return 0; |
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} |
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|
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static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl) |
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{ |
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RTSPState *rt = s->priv_data; |
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RTSPMessageHeader request = { 0 }; |
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int ret = 0; |
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char url[1024]; |
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RTSPStream *rtsp_st; |
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char responseheaders[1024]; |
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int localport = -1; |
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int transportidx = 0; |
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int streamid = 0; |
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|
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ret = rtsp_read_request(s, &request, "SETUP"); |
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if (ret) |
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return ret; |
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rt->seq++; |
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if (!request.nb_transports) { |
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av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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for (transportidx = 0; transportidx < request.nb_transports; |
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transportidx++) { |
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if (!request.transports[transportidx].mode_record || |
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(request.transports[transportidx].lower_transport != |
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RTSP_LOWER_TRANSPORT_UDP && |
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request.transports[transportidx].lower_transport != |
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RTSP_LOWER_TRANSPORT_TCP)) { |
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av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport" |
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" protocol not supported (yet)\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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} |
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if (request.nb_transports > 1) |
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av_log(s, AV_LOG_WARNING, "More than one transport not supported, " |
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"using first of all\n"); |
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for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) { |
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if (!strcmp(rt->rtsp_streams[streamid]->control_url, |
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controlurl)) |
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break; |
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} |
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if (streamid == rt->nb_rtsp_streams) { |
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av_log(s, AV_LOG_ERROR, "Unable to find requested track\n"); |
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return AVERROR_STREAM_NOT_FOUND; |
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} |
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rtsp_st = rt->rtsp_streams[streamid]; |
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localport = rt->rtp_port_min; |
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|
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if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) { |
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rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP; |
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if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { |
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rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); |
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return ret; |
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} |
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rtsp_st->interleaved_min = request.transports[0].interleaved_min; |
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rtsp_st->interleaved_max = request.transports[0].interleaved_max; |
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snprintf(responseheaders, sizeof(responseheaders), "Transport: " |
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"RTP/AVP/TCP;unicast;mode=receive;interleaved=%d-%d" |
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"\r\n", request.transports[0].interleaved_min, |
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request.transports[0].interleaved_max); |
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} else { |
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do { |
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ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL); |
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av_dlog(s, "Opening: %s", url); |
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ret = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE, |
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&s->interrupt_callback, NULL); |
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if (ret) |
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localport += 2; |
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} while (ret || localport > rt->rtp_port_max); |
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if (localport > rt->rtp_port_max) { |
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rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); |
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return ret; |
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} |
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|
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av_dlog(s, "Listening on: %d", |
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ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle)); |
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if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { |
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rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); |
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return ret; |
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} |
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|
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localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle); |
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snprintf(responseheaders, sizeof(responseheaders), "Transport: " |
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"RTP/AVP/UDP;unicast;mode=receive;source=%s;" |
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"client_port=%d-%d;server_port=%d-%d\r\n", |
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host, request.transports[0].client_port_min, |
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request.transports[0].client_port_max, localport, |
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localport + 1); |
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} |
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|
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/* Establish sessionid if not previously set */ |
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/* Put this in a function? */ |
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/* RFC 2326: session id must be at least 8 digits */ |
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while (strlen(rt->session_id) < 8) |
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av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed()); |
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|
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av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", |
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rt->session_id); |
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/* Send Reply */ |
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rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); |
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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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|
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static int rtsp_read_record(AVFormatContext *s) |
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{ |
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RTSPState *rt = s->priv_data; |
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RTSPMessageHeader request = { 0 }; |
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int ret = 0; |
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char responseheaders[1024]; |
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|
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ret = rtsp_read_request(s, &request, "RECORD"); |
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if (ret) |
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return ret; |
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ret = check_sessionid(s, &request); |
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if (ret) |
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return ret; |
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rt->seq++; |
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snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", |
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rt->session_id); |
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rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); |
|
|
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rt->state = RTSP_STATE_STREAMING; |
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return 0; |
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} |
|
|
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static inline int parse_command_line(AVFormatContext *s, const char *line, |
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int linelen, char *uri, int urisize, |
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char *method, int methodsize, |
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enum RTSPMethod *methodcode) |
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{ |
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RTSPState *rt = s->priv_data; |
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const char *linept, *searchlinept; |
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linept = strchr(line, ' '); |
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if (linept - line > methodsize - 1) { |
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av_log(s, AV_LOG_ERROR, "Method string too long\n"); |
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return AVERROR(EIO); |
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} |
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memcpy(method, line, linept - line); |
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method[linept - line] = '\0'; |
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linept++; |
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if (!strcmp(method, "ANNOUNCE")) |
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*methodcode = ANNOUNCE; |
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else if (!strcmp(method, "OPTIONS")) |
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*methodcode = OPTIONS; |
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else if (!strcmp(method, "RECORD")) |
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*methodcode = RECORD; |
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else if (!strcmp(method, "SETUP")) |
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*methodcode = SETUP; |
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else if (!strcmp(method, "PAUSE")) |
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*methodcode = PAUSE; |
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else if (!strcmp(method, "TEARDOWN")) |
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*methodcode = TEARDOWN; |
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else |
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*methodcode = UNKNOWN; |
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/* Check method with the state */ |
|
if (rt->state == RTSP_STATE_IDLE) { |
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if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) { |
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av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n", |
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line); |
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return AVERROR_PROTOCOL_NOT_FOUND; |
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} |
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} else if (rt->state == RTSP_STATE_PAUSED) { |
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if ((*methodcode != OPTIONS) && (*methodcode != RECORD) |
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&& (*methodcode != SETUP)) { |
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av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n", |
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line); |
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return AVERROR_PROTOCOL_NOT_FOUND; |
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} |
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} else if (rt->state == RTSP_STATE_STREAMING) { |
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if ((*methodcode != PAUSE) && (*methodcode != OPTIONS) |
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&& (*methodcode != TEARDOWN)) { |
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av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State" |
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" %s\n", line); |
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return AVERROR_PROTOCOL_NOT_FOUND; |
|
} |
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} else { |
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av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state); |
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return AVERROR_BUG; |
|
} |
|
|
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searchlinept = strchr(linept, ' '); |
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if (!searchlinept) { |
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av_log(s, AV_LOG_ERROR, "Error parsing message URI\n"); |
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return AVERROR_INVALIDDATA; |
|
} |
|
if (searchlinept - linept > urisize - 1) { |
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av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n"); |
|
return AVERROR(EIO); |
|
} |
|
memcpy(uri, linept, searchlinept - linept); |
|
uri[searchlinept - linept] = '\0'; |
|
if (strcmp(rt->control_uri, uri)) { |
|
char host[128], path[512], auth[128]; |
|
int port; |
|
char ctl_host[128], ctl_path[512], ctl_auth[128]; |
|
int ctl_port; |
|
av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port, |
|
path, sizeof(path), uri); |
|
av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host, |
|
sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path), |
|
rt->control_uri); |
|
if (strcmp(host, ctl_host)) |
|
av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n", |
|
host, ctl_host); |
|
if (strcmp(path, ctl_path) && *methodcode != SETUP) |
|
av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected" |
|
" %s\n", path, ctl_path); |
|
if (*methodcode == ANNOUNCE) { |
|
av_log(s, AV_LOG_INFO, |
|
"Updating control URI to %s\n", uri); |
|
av_strlcpy(rt->control_uri, uri, sizeof(rt->control_uri)); |
|
} |
|
} |
|
|
|
linept = searchlinept + 1; |
|
if (!av_strstart(linept, "RTSP/1.0", NULL)) { |
|
av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n"); |
|
return AVERROR_PROTOCOL_NOT_FOUND; |
|
} |
|
return 0; |
|
} |
|
|
|
int ff_rtsp_parse_streaming_commands(AVFormatContext *s) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
unsigned char rbuf[4096]; |
|
unsigned char method[10]; |
|
char uri[500]; |
|
int ret; |
|
int rbuflen = 0; |
|
RTSPMessageHeader request = { 0 }; |
|
enum RTSPMethod methodcode; |
|
|
|
ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); |
|
if (ret < 0) |
|
return ret; |
|
ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, |
|
sizeof(method), &methodcode); |
|
if (ret) { |
|
av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); |
|
return ret; |
|
} |
|
|
|
ret = rtsp_read_request(s, &request, method); |
|
if (ret) |
|
return ret; |
|
rt->seq++; |
|
if (methodcode == PAUSE) { |
|
rt->state = RTSP_STATE_PAUSED; |
|
ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); |
|
// TODO: Missing date header in response |
|
} else if (methodcode == OPTIONS) { |
|
ret = rtsp_send_reply(s, RTSP_STATUS_OK, |
|
"Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, " |
|
"RECORD\r\n", request.seq); |
|
} else if (methodcode == TEARDOWN) { |
|
rt->state = RTSP_STATE_IDLE; |
|
ret = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq); |
|
return 0; |
|
} |
|
return ret; |
|
} |
|
|
|
static int rtsp_read_play(AVFormatContext *s) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
RTSPMessageHeader reply1, *reply = &reply1; |
|
int i; |
|
char cmd[1024]; |
|
|
|
av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state); |
|
rt->nb_byes = 0; |
|
|
|
if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { |
|
if (rt->transport == RTSP_TRANSPORT_RTP) { |
|
for (i = 0; i < rt->nb_rtsp_streams; i++) { |
|
RTSPStream *rtsp_st = rt->rtsp_streams[i]; |
|
RTPDemuxContext *rtpctx = rtsp_st->transport_priv; |
|
if (!rtpctx) |
|
continue; |
|
ff_rtp_reset_packet_queue(rtpctx); |
|
rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE; |
|
rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE; |
|
rtpctx->base_timestamp = 0; |
|
rtpctx->timestamp = 0; |
|
rtpctx->unwrapped_timestamp = 0; |
|
rtpctx->rtcp_ts_offset = 0; |
|
} |
|
} |
|
if (rt->state == RTSP_STATE_PAUSED) { |
|
cmd[0] = 0; |
|
} else { |
|
snprintf(cmd, sizeof(cmd), |
|
"Range: npt=%"PRId64".%03"PRId64"-\r\n", |
|
rt->seek_timestamp / AV_TIME_BASE, |
|
rt->seek_timestamp / (AV_TIME_BASE / 1000) % 1000); |
|
} |
|
ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL); |
|
if (reply->status_code != RTSP_STATUS_OK) { |
|
return -1; |
|
} |
|
if (rt->transport == RTSP_TRANSPORT_RTP && |
|
reply->range_start != AV_NOPTS_VALUE) { |
|
for (i = 0; i < rt->nb_rtsp_streams; i++) { |
|
RTSPStream *rtsp_st = rt->rtsp_streams[i]; |
|
RTPDemuxContext *rtpctx = rtsp_st->transport_priv; |
|
AVStream *st = NULL; |
|
if (!rtpctx || rtsp_st->stream_index < 0) |
|
continue; |
|
st = s->streams[rtsp_st->stream_index]; |
|
rtpctx->range_start_offset = |
|
av_rescale_q(reply->range_start, AV_TIME_BASE_Q, |
|
st->time_base); |
|
} |
|
} |
|
} |
|
rt->state = RTSP_STATE_STREAMING; |
|
return 0; |
|
} |
|
|
|
/* pause the stream */ |
|
static int rtsp_read_pause(AVFormatContext *s) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
RTSPMessageHeader reply1, *reply = &reply1; |
|
|
|
if (rt->state != RTSP_STATE_STREAMING) |
|
return 0; |
|
else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) { |
|
ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL); |
|
if (reply->status_code != RTSP_STATUS_OK) { |
|
return -1; |
|
} |
|
} |
|
rt->state = RTSP_STATE_PAUSED; |
|
return 0; |
|
} |
|
|
|
int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
char cmd[1024]; |
|
unsigned char *content = NULL; |
|
int ret; |
|
|
|
/* describe the stream */ |
|
snprintf(cmd, sizeof(cmd), |
|
"Accept: application/sdp\r\n"); |
|
if (rt->server_type == RTSP_SERVER_REAL) { |
|
/** |
|
* The Require: attribute is needed for proper streaming from |
|
* Realmedia servers. |
|
*/ |
|
av_strlcat(cmd, |
|
"Require: com.real.retain-entity-for-setup\r\n", |
|
sizeof(cmd)); |
|
} |
|
ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content); |
|
if (!content) |
|
return AVERROR_INVALIDDATA; |
|
if (reply->status_code != RTSP_STATUS_OK) { |
|
av_freep(&content); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", content); |
|
/* now we got the SDP description, we parse it */ |
|
ret = ff_sdp_parse(s, (const char *)content); |
|
av_freep(&content); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static int rtsp_listen(AVFormatContext *s) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
char host[128], path[512], auth[128]; |
|
char uri[500]; |
|
int port; |
|
char tcpname[500]; |
|
unsigned char rbuf[4096]; |
|
unsigned char method[10]; |
|
int rbuflen = 0; |
|
int ret; |
|
enum RTSPMethod methodcode; |
|
|
|
/* extract hostname and port */ |
|
av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port, |
|
path, sizeof(path), s->filename); |
|
|
|
/* ff_url_join. No authorization by now (NULL) */ |
|
ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL, host, |
|
port, "%s", path); |
|
|
|
if (port < 0) |
|
port = RTSP_DEFAULT_PORT; |
|
|
|
/* Create TCP connection */ |
|
ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, |
|
"?listen&listen_timeout=%d", rt->initial_timeout * 1000); |
|
|
|
if (ret = ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE, |
|
&s->interrupt_callback, NULL)) { |
|
av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n"); |
|
return ret; |
|
} |
|
rt->state = RTSP_STATE_IDLE; |
|
rt->rtsp_hd_out = rt->rtsp_hd; |
|
for (;;) { /* Wait for incoming RTSP messages */ |
|
ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); |
|
if (ret < 0) |
|
return ret; |
|
ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method, |
|
sizeof(method), &methodcode); |
|
if (ret) { |
|
av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n"); |
|
return ret; |
|
} |
|
|
|
if (methodcode == ANNOUNCE) { |
|
ret = rtsp_read_announce(s); |
|
rt->state = RTSP_STATE_PAUSED; |
|
} else if (methodcode == OPTIONS) { |
|
ret = rtsp_read_options(s); |
|
} else if (methodcode == RECORD) { |
|
ret = rtsp_read_record(s); |
|
if (!ret) |
|
return 0; // We are ready for streaming |
|
} else if (methodcode == SETUP) |
|
ret = rtsp_read_setup(s, host, uri); |
|
if (ret) { |
|
ffurl_close(rt->rtsp_hd); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int rtsp_probe(AVProbeData *p) |
|
{ |
|
if (av_strstart(p->filename, "rtsp:", NULL)) |
|
return AVPROBE_SCORE_MAX; |
|
return 0; |
|
} |
|
|
|
static int rtsp_read_header(AVFormatContext *s) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
int ret; |
|
|
|
if (rt->initial_timeout > 0) |
|
rt->rtsp_flags |= RTSP_FLAG_LISTEN; |
|
|
|
if (rt->rtsp_flags & RTSP_FLAG_LISTEN) { |
|
ret = rtsp_listen(s); |
|
if (ret) |
|
return ret; |
|
} else { |
|
ret = ff_rtsp_connect(s); |
|
if (ret) |
|
return ret; |
|
|
|
rt->real_setup_cache = !s->nb_streams ? NULL : |
|
av_mallocz(2 * s->nb_streams * sizeof(*rt->real_setup_cache)); |
|
if (!rt->real_setup_cache && s->nb_streams) |
|
return AVERROR(ENOMEM); |
|
rt->real_setup = rt->real_setup_cache + s->nb_streams; |
|
|
|
if (rt->initial_pause) { |
|
/* do not start immediately */ |
|
} else { |
|
if (rtsp_read_play(s) < 0) { |
|
ff_rtsp_close_streams(s); |
|
ff_rtsp_close_connections(s); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int ff_rtsp_tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, |
|
uint8_t *buf, int buf_size) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
int id, len, i, ret; |
|
RTSPStream *rtsp_st; |
|
|
|
av_dlog(s, "tcp_read_packet:\n"); |
|
redo: |
|
for (;;) { |
|
RTSPMessageHeader reply; |
|
|
|
ret = ff_rtsp_read_reply(s, &reply, NULL, 1, NULL); |
|
if (ret < 0) |
|
return ret; |
|
if (ret == 1) /* received '$' */ |
|
break; |
|
/* XXX: parse message */ |
|
if (rt->state != RTSP_STATE_STREAMING) |
|
return 0; |
|
} |
|
ret = ffurl_read_complete(rt->rtsp_hd, buf, 3); |
|
if (ret != 3) |
|
return -1; |
|
id = buf[0]; |
|
len = AV_RB16(buf + 1); |
|
av_dlog(s, "id=%d len=%d\n", id, len); |
|
if (len > buf_size || len < 12) |
|
goto redo; |
|
/* get the data */ |
|
ret = ffurl_read_complete(rt->rtsp_hd, buf, len); |
|
if (ret != len) |
|
return -1; |
|
if (rt->transport == RTSP_TRANSPORT_RDT && |
|
ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0) |
|
return -1; |
|
|
|
/* find the matching stream */ |
|
for (i = 0; i < rt->nb_rtsp_streams; i++) { |
|
rtsp_st = rt->rtsp_streams[i]; |
|
if (id >= rtsp_st->interleaved_min && |
|
id <= rtsp_st->interleaved_max) |
|
goto found; |
|
} |
|
goto redo; |
|
found: |
|
*prtsp_st = rtsp_st; |
|
return len; |
|
} |
|
|
|
static int resetup_tcp(AVFormatContext *s) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
char host[1024]; |
|
int port; |
|
|
|
av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port, NULL, 0, |
|
s->filename); |
|
ff_rtsp_undo_setup(s, 0); |
|
return ff_rtsp_make_setup_request(s, host, port, RTSP_LOWER_TRANSPORT_TCP, |
|
rt->real_challenge); |
|
} |
|
|
|
static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
int ret; |
|
RTSPMessageHeader reply1, *reply = &reply1; |
|
char cmd[1024]; |
|
|
|
retry: |
|
if (rt->server_type == RTSP_SERVER_REAL) { |
|
int i; |
|
|
|
for (i = 0; i < s->nb_streams; i++) |
|
rt->real_setup[i] = s->streams[i]->discard; |
|
|
|
if (!rt->need_subscription) { |
|
if (memcmp (rt->real_setup, rt->real_setup_cache, |
|
sizeof(enum AVDiscard) * s->nb_streams)) { |
|
snprintf(cmd, sizeof(cmd), |
|
"Unsubscribe: %s\r\n", |
|
rt->last_subscription); |
|
ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, |
|
cmd, reply, NULL); |
|
if (reply->status_code != RTSP_STATUS_OK) |
|
return AVERROR_INVALIDDATA; |
|
rt->need_subscription = 1; |
|
} |
|
} |
|
|
|
if (rt->need_subscription) { |
|
int r, rule_nr, first = 1; |
|
|
|
memcpy(rt->real_setup_cache, rt->real_setup, |
|
sizeof(enum AVDiscard) * s->nb_streams); |
|
rt->last_subscription[0] = 0; |
|
|
|
snprintf(cmd, sizeof(cmd), |
|
"Subscribe: "); |
|
for (i = 0; i < rt->nb_rtsp_streams; i++) { |
|
rule_nr = 0; |
|
for (r = 0; r < s->nb_streams; r++) { |
|
if (s->streams[r]->id == i) { |
|
if (s->streams[r]->discard != AVDISCARD_ALL) { |
|
if (!first) |
|
av_strlcat(rt->last_subscription, ",", |
|
sizeof(rt->last_subscription)); |
|
ff_rdt_subscribe_rule( |
|
rt->last_subscription, |
|
sizeof(rt->last_subscription), i, rule_nr); |
|
first = 0; |
|
} |
|
rule_nr++; |
|
} |
|
} |
|
} |
|
av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription); |
|
ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri, |
|
cmd, reply, NULL); |
|
if (reply->status_code != RTSP_STATUS_OK) |
|
return AVERROR_INVALIDDATA; |
|
rt->need_subscription = 0; |
|
|
|
if (rt->state == RTSP_STATE_STREAMING) |
|
rtsp_read_play (s); |
|
} |
|
} |
|
|
|
ret = ff_rtsp_fetch_packet(s, pkt); |
|
if (ret < 0) { |
|
if (ret == AVERROR(ETIMEDOUT) && !rt->packets) { |
|
if (rt->lower_transport == RTSP_LOWER_TRANSPORT_UDP && |
|
rt->lower_transport_mask & (1 << RTSP_LOWER_TRANSPORT_TCP)) { |
|
RTSPMessageHeader reply1, *reply = &reply1; |
|
av_log(s, AV_LOG_WARNING, "UDP timeout, retrying with TCP\n"); |
|
if (rtsp_read_pause(s) != 0) |
|
return -1; |
|
// TEARDOWN is required on Real-RTSP, but might make |
|
// other servers close the connection. |
|
if (rt->server_type == RTSP_SERVER_REAL) |
|
ff_rtsp_send_cmd(s, "TEARDOWN", rt->control_uri, NULL, |
|
reply, NULL); |
|
rt->session_id[0] = '\0'; |
|
if (resetup_tcp(s) == 0) { |
|
rt->state = RTSP_STATE_IDLE; |
|
rt->need_subscription = 1; |
|
if (rtsp_read_play(s) != 0) |
|
return -1; |
|
goto retry; |
|
} |
|
} |
|
} |
|
return ret; |
|
} |
|
rt->packets++; |
|
|
|
if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) { |
|
/* send dummy request to keep TCP connection alive */ |
|
if ((av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 || |
|
rt->auth_state.stale) { |
|
if (rt->server_type == RTSP_SERVER_WMS || |
|
(rt->server_type != RTSP_SERVER_REAL && |
|
rt->get_parameter_supported)) { |
|
ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL); |
|
} else { |
|
ff_rtsp_send_cmd_async(s, "OPTIONS", rt->control_uri, NULL); |
|
} |
|
/* The stale flag should be reset when creating the auth response in |
|
* ff_rtsp_send_cmd_async, but reset it here just in case we never |
|
* called the auth code (if we didn't have any credentials set). */ |
|
rt->auth_state.stale = 0; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int rtsp_read_seek(AVFormatContext *s, int stream_index, |
|
int64_t timestamp, int flags) |
|
{ |
|
RTSPState *rt = s->priv_data; |
|
|
|
rt->seek_timestamp = av_rescale_q(timestamp, |
|
s->streams[stream_index]->time_base, |
|
AV_TIME_BASE_Q); |
|
switch(rt->state) { |
|
default: |
|
case RTSP_STATE_IDLE: |
|
break; |
|
case RTSP_STATE_STREAMING: |
|
if (rtsp_read_pause(s) != 0) |
|
return -1; |
|
rt->state = RTSP_STATE_SEEKING; |
|
if (rtsp_read_play(s) != 0) |
|
return -1; |
|
break; |
|
case RTSP_STATE_PAUSED: |
|
rt->state = RTSP_STATE_IDLE; |
|
break; |
|
} |
|
return 0; |
|
} |
|
|
|
static const AVClass rtsp_demuxer_class = { |
|
.class_name = "RTSP demuxer", |
|
.item_name = av_default_item_name, |
|
.option = ff_rtsp_options, |
|
.version = LIBAVUTIL_VERSION_INT, |
|
}; |
|
|
|
AVInputFormat ff_rtsp_demuxer = { |
|
.name = "rtsp", |
|
.long_name = NULL_IF_CONFIG_SMALL("RTSP input"), |
|
.priv_data_size = sizeof(RTSPState), |
|
.read_probe = rtsp_probe, |
|
.read_header = rtsp_read_header, |
|
.read_packet = rtsp_read_packet, |
|
.read_close = rtsp_read_close, |
|
.read_seek = rtsp_read_seek, |
|
.flags = AVFMT_NOFILE, |
|
.read_play = rtsp_read_play, |
|
.read_pause = rtsp_read_pause, |
|
.priv_class = &rtsp_demuxer_class, |
|
};
|
|
|