diff options
Diffstat (limited to 'ffmpeg/libavformat/rtspdec.c')
| -rw-r--r-- | ffmpeg/libavformat/rtspdec.c | 938 |
1 files changed, 0 insertions, 938 deletions
diff --git a/ffmpeg/libavformat/rtspdec.c b/ffmpeg/libavformat/rtspdec.c deleted file mode 100644 index 74a7bf6..0000000 --- a/ffmpeg/libavformat/rtspdec.c +++ /dev/null @@ -1,938 +0,0 @@ -/* - * RTSP demuxer - * Copyright (c) 2002 Fabrice Bellard - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libavutil/avstring.h" -#include "libavutil/intreadwrite.h" -#include "libavutil/mathematics.h" -#include "libavutil/random_seed.h" -#include "libavutil/time.h" -#include "avformat.h" - -#include "internal.h" -#include "network.h" -#include "os_support.h" -#include "rtpproto.h" -#include "rtsp.h" -#include "rdt.h" -#include "url.h" - -static const struct RTSPStatusMessage { - enum RTSPStatusCode code; - const char *message; -} status_messages[] = { - { RTSP_STATUS_OK, "OK" }, - { RTSP_STATUS_METHOD, "Method Not Allowed" }, - { RTSP_STATUS_BANDWIDTH, "Not Enough Bandwidth" }, - { RTSP_STATUS_SESSION, "Session Not Found" }, - { RTSP_STATUS_STATE, "Method Not Valid in This State" }, - { RTSP_STATUS_AGGREGATE, "Aggregate operation not allowed" }, - { RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" }, - { RTSP_STATUS_TRANSPORT, "Unsupported transport" }, - { RTSP_STATUS_INTERNAL, "Internal Server Error" }, - { RTSP_STATUS_SERVICE, "Service Unavailable" }, - { RTSP_STATUS_VERSION, "RTSP Version not supported" }, - { 0, "NULL" } -}; - -static int rtsp_read_close(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - - if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) - ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL); - - ff_rtsp_close_streams(s); - ff_rtsp_close_connections(s); - ff_network_close(); - rt->real_setup = NULL; - av_freep(&rt->real_setup_cache); - return 0; -} - -static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize, - int *rbuflen) -{ - RTSPState *rt = s->priv_data; - int idx = 0; - int ret = 0; - *rbuflen = 0; - - do { - ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1); - if (ret <= 0) - return ret ? ret : AVERROR_EOF; - if (rbuf[idx] == '\r') { - /* Ignore */ - } else if (rbuf[idx] == '\n') { - rbuf[idx] = '\0'; - *rbuflen = idx; - return 0; - } else - idx++; - } while (idx < rbufsize); - av_log(s, AV_LOG_ERROR, "Message too long\n"); - return AVERROR(EIO); -} - -static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code, - const char *extracontent, uint16_t seq) -{ - RTSPState *rt = s->priv_data; - char message[4096]; - int index = 0; - while (status_messages[index].code) { - if (status_messages[index].code == code) { - snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n", - code, status_messages[index].message); - break; - } - index++; - } - if (!status_messages[index].code) - return AVERROR(EINVAL); - av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq); - av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT); - if (extracontent) - av_strlcat(message, extracontent, sizeof(message)); - av_strlcat(message, "\r\n", sizeof(message)); - av_dlog(s, "Sending response:\n%s", message); - ffurl_write(rt->rtsp_hd, message, strlen(message)); - - return 0; -} - -static inline int check_sessionid(AVFormatContext *s, - RTSPMessageHeader *request) -{ - RTSPState *rt = s->priv_data; - unsigned char *session_id = rt->session_id; - if (!session_id[0]) { - av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n"); - return 0; - } - if (strcmp(session_id, request->session_id)) { - av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n", - request->session_id); - rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq); - return AVERROR_STREAM_NOT_FOUND; - } - return 0; -} - -static inline int rtsp_read_request(AVFormatContext *s, - RTSPMessageHeader *request, - const char *method) -{ - RTSPState *rt = s->priv_data; - char rbuf[1024]; - int rbuflen, ret; - do { - ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen); - if (ret) - return ret; - if (rbuflen > 1) { - av_dlog(s, "Parsing[%d]: %s\n", rbuflen, rbuf); - ff_rtsp_parse_line(request, rbuf, rt, method); - } - } while (rbuflen > 0); - if (request->seq != rt->seq + 1) { - av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n", - request->seq); - return AVERROR(EINVAL); - } - if (rt->session_id[0] && strcmp(method, "OPTIONS")) { - ret = check_sessionid(s, request); - if (ret) - return ret; - } - - return 0; -} - -static int rtsp_read_announce(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - RTSPMessageHeader request = { 0 }; - char sdp[4096]; - int ret; - - ret = rtsp_read_request(s, &request, "ANNOUNCE"); - if (ret) - return ret; - rt->seq++; - if (strcmp(request.content_type, "application/sdp")) { - av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n", - request.content_type); - rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq); - return AVERROR_OPTION_NOT_FOUND; - } - if (request.content_length && request.content_length < sizeof(sdp) - 1) { - /* Read SDP */ - if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length) - < request.content_length) { - av_log(s, AV_LOG_ERROR, - "Unable to get complete SDP Description in ANNOUNCE\n"); - rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq); - return AVERROR(EIO); - } - sdp[request.content_length] = '\0'; - av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp); - ret = ff_sdp_parse(s, sdp); - if (ret) - return ret; - rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq); - return 0; - } - av_log(s, AV_LOG_ERROR, - "Content-Length header value exceeds sdp allocated buffer (4KB)\n"); - rtsp_send_reply(s, RTSP_STATUS_INTERNAL, - "Content-Length exceeds buffer size", request.seq); - return AVERROR(EIO); -} - -static int rtsp_read_options(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - RTSPMessageHeader request = { 0 }; - int ret = 0; - - /* Parsing headers */ - ret = rtsp_read_request(s, &request, "OPTIONS"); - if (ret) - return ret; - rt->seq++; - /* Send Reply */ - rtsp_send_reply(s, RTSP_STATUS_OK, - "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n", - request.seq); - return 0; -} - -static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl) -{ - RTSPState *rt = s->priv_data; - RTSPMessageHeader request = { 0 }; - int ret = 0; - char url[1024]; - RTSPStream *rtsp_st; - char responseheaders[1024]; - int localport = -1; - int transportidx = 0; - int streamid = 0; - - ret = rtsp_read_request(s, &request, "SETUP"); - if (ret) - return ret; - rt->seq++; - if (!request.nb_transports) { - av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n"); - return AVERROR_INVALIDDATA; - } - for (transportidx = 0; transportidx < request.nb_transports; - transportidx++) { - if (!request.transports[transportidx].mode_record || - (request.transports[transportidx].lower_transport != - RTSP_LOWER_TRANSPORT_UDP && - request.transports[transportidx].lower_transport != - RTSP_LOWER_TRANSPORT_TCP)) { - av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport" - " protocol not supported (yet)\n"); - return AVERROR_INVALIDDATA; - } - } - if (request.nb_transports > 1) - av_log(s, AV_LOG_WARNING, "More than one transport not supported, " - "using first of all\n"); - for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) { - if (!strcmp(rt->rtsp_streams[streamid]->control_url, - controlurl)) - break; - } - if (streamid == rt->nb_rtsp_streams) { - av_log(s, AV_LOG_ERROR, "Unable to find requested track\n"); - return AVERROR_STREAM_NOT_FOUND; - } - rtsp_st = rt->rtsp_streams[streamid]; - localport = rt->rtp_port_min; - - if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) { - rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP; - if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { - rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); - return ret; - } - rtsp_st->interleaved_min = request.transports[0].interleaved_min; - rtsp_st->interleaved_max = request.transports[0].interleaved_max; - snprintf(responseheaders, sizeof(responseheaders), "Transport: " - "RTP/AVP/TCP;unicast;mode=receive;interleaved=%d-%d" - "\r\n", request.transports[0].interleaved_min, - request.transports[0].interleaved_max); - } else { - do { - ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL); - av_dlog(s, "Opening: %s", url); - ret = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE, - &s->interrupt_callback, NULL); - if (ret) - localport += 2; - } while (ret || localport > rt->rtp_port_max); - if (localport > rt->rtp_port_max) { - rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); - return ret; - } - - av_dlog(s, "Listening on: %d", - ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle)); - if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) { - rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq); - return ret; - } - - localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle); - snprintf(responseheaders, sizeof(responseheaders), "Transport: " - "RTP/AVP/UDP;unicast;mode=receive;source=%s;" - "client_port=%d-%d;server_port=%d-%d\r\n", - host, request.transports[0].client_port_min, - request.transports[0].client_port_max, localport, - localport + 1); - } - - /* Establish sessionid if not previously set */ - /* Put this in a function? */ - /* RFC 2326: session id must be at least 8 digits */ - while (strlen(rt->session_id) < 8) - av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed()); - - av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", - rt->session_id); - /* Send Reply */ - rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); - - rt->state = RTSP_STATE_PAUSED; - return 0; -} - -static int rtsp_read_record(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - RTSPMessageHeader request = { 0 }; - int ret = 0; - char responseheaders[1024]; - - ret = rtsp_read_request(s, &request, "RECORD"); - if (ret) - return ret; - ret = check_sessionid(s, &request); - if (ret) - return ret; - rt->seq++; - snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n", - rt->session_id); - rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq); - - rt->state = RTSP_STATE_STREAMING; - return 0; -} - -static inline int parse_command_line(AVFormatContext *s, const char *line, - int linelen, char *uri, int urisize, - char *method, int methodsize, - enum RTSPMethod *methodcode) -{ - RTSPState *rt = s->priv_data; - const char *linept, *searchlinept; - linept = strchr(line, ' '); - if (linept - line > methodsize - 1) { - av_log(s, AV_LOG_ERROR, "Method string too long\n"); - return AVERROR(EIO); - } - memcpy(method, line, linept - line); - method[linept - line] = '\0'; - linept++; - if (!strcmp(method, "ANNOUNCE")) - *methodcode = ANNOUNCE; - else if (!strcmp(method, "OPTIONS")) - *methodcode = OPTIONS; - else if (!strcmp(method, "RECORD")) - *methodcode = RECORD; - else if (!strcmp(method, "SETUP")) - *methodcode = SETUP; - else if (!strcmp(method, "PAUSE")) - *methodcode = PAUSE; - else if (!strcmp(method, "TEARDOWN")) - *methodcode = TEARDOWN; - else - *methodcode = UNKNOWN; - /* Check method with the state */ - if (rt->state == RTSP_STATE_IDLE) { - if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) { - av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n", - line); - return AVERROR_PROTOCOL_NOT_FOUND; - } - } else if (rt->state == RTSP_STATE_PAUSED) { - if ((*methodcode != OPTIONS) && (*methodcode != RECORD) - && (*methodcode != SETUP)) { - av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n", - line); - return AVERROR_PROTOCOL_NOT_FOUND; - } - } else if (rt->state == RTSP_STATE_STREAMING) { - if ((*methodcode != PAUSE) && (*methodcode != OPTIONS) - && (*methodcode != TEARDOWN)) { - av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State" - " %s\n", line); - return AVERROR_PROTOCOL_NOT_FOUND; - } - } else { - av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state); - return AVERROR_BUG; - } - - searchlinept = strchr(linept, ' '); - if (searchlinept == NULL) { - av_log(s, AV_LOG_ERROR, "Error parsing message URI\n"); - return AVERROR_INVALIDDATA; - } - if (searchlinept - linept > urisize - 1) { - 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 < 8) - 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, -}; 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