make_setup_request (AVFormatContext *s, const char *host, int port, int protocol) { RTSPState *rt = s->priv_data; int j, i, err; RTSPStream *rtsp_st; AVStream *st; RTSPHeader reply1, *reply = &reply1; char cmd[2048]; /* for each stream, make the setup request */ /* XXX: we assume the same server is used for the control of each RTSP stream */ for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) { char transport[2048]; rtsp_st = rt->rtsp_streams[i]; /* compute available transports */ transport[0] = '\0'; /* RTP/UDP */ if (protocol == RTSP_PROTOCOL_RTP_UDP) { char buf[256]; /* first try in specified port range */ if (RTSP_RTP_PORT_MIN != 0) { while(j <= RTSP_RTP_PORT_MAX) { snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j); j += 2; /* we will use two port by rtp stream (rtp and rtcp) */ if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) { goto rtp_opened; } } } /* then try on any port ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) { ** err = AVERROR_INVALIDDATA; ** goto fail; ** } */ rtp_opened: port = rtp_get_local_port(rtsp_st->rtp_handle); if (transport[0] != '\0') av_strlcat(transport, ",", sizeof(transport)); snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, "RTP/AVP/UDP;unicast;client_port=%d-%d", port, port + 1); } /* RTP/TCP */ else if (protocol == RTSP_PROTOCOL_RTP_TCP) { if (transport[0] != '\0') av_strlcat(transport, ",", sizeof(transport)); snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, "RTP/AVP/TCP"); } else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) { if (transport[0] != '\0') av_strlcat(transport, ",", sizeof(transport)); snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, "RTP/AVP/UDP;multicast"); } snprintf(cmd, sizeof(cmd), "SETUP %s RTSP/1.0\r\n" "Transport: %s\r\n", rtsp_st->control_url, transport); rtsp_send_cmd(s, cmd, reply, NULL); if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) { err = 1; goto fail; } else if (reply->status_code != RTSP_STATUS_OK || reply->nb_transports != 1) { err = AVERROR_INVALIDDATA; goto fail; } /* XXX: same protocol for all streams is required */ if (i > 0) { if (reply->transports[0].protocol != rt->protocol) { err = AVERROR_INVALIDDATA; goto fail; } } else { rt->protocol = reply->transports[0].protocol; } /* close RTP connection if not choosen */ if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP && (protocol == RTSP_PROTOCOL_RTP_UDP)) { url_close(rtsp_st->rtp_handle); rtsp_st->rtp_handle = NULL; } switch(reply->transports[0].protocol) { case RTSP_PROTOCOL_RTP_TCP: rtsp_st->interleaved_min = reply->transports[0].interleaved_min; rtsp_st->interleaved_max = reply->transports[0].interleaved_max; break; case RTSP_PROTOCOL_RTP_UDP: { char url[1024]; /* XXX: also use address if specified */ snprintf(url, sizeof(url), "rtp://%s:%d", host, reply->transports[0].server_port_min); if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) { err = AVERROR_INVALIDDATA; goto fail; } } break; case RTSP_PROTOCOL_RTP_UDP_MULTICAST: { char url[1024]; struct in_addr in; in.s_addr = htonl(reply->transports[0].destination); snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d", inet_ntoa(in), reply->transports[0].port_min, reply->transports[0].ttl); if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) { err = AVERROR_INVALIDDATA; goto fail; } } break; } /* open the RTP context */ st = NULL; if (rtsp_st->stream_index >= 0) st = s->streams[rtsp_st->stream_index]; if (!st) s->ctx_flags |= AVFMTCTX_NOHEADER; rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data); if (!rtsp_st->rtp_ctx) { err = AVERROR(ENOMEM); goto fail; } else { if(rtsp_st->dynamic_handler) { rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context; rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet; } } } return 0; fail: for (i=0; i<rt->nb_rtsp_streams; i++) { if (rt->rtsp_streams[i]->rtp_handle) { url_close(rt->rtsp_streams[i]->rtp_handle); rt->rtsp_streams[i]->rtp_handle = NULL; } } return err; }