/* v=0 o=mhandley 2890844526 2890842807 IN IP4 126.16.64.4 s=SDP Seminar i=A Seminar on the session description protocol u=http://www.cs.ucl.ac.uk/staff/M.Handley/sdp.03.ps [email protected] (Mark Handley) c=IN IP4 224.2.17.12/127 t=2873397496 2873404696 a=recvonly m=audio 3456 RTP/AVP 0 m=video 2232 RTP/AVP 31 m=whiteboard 32416 UDP WB a=orient:portrait */ int rtsp_client_sdp(struct rtsp_client_t* rtsp, const char* content) { int i, j, n, count; int formats[N_MEDIA_FORMAT]; struct rtsp_media_t* media; void* sdp; sdp = sdp_parse(content); if (!sdp) return -1; count = sdp_media_count(sdp); if(count > N_MEDIA) { rtsp->media_ptr = (struct rtsp_media_t*)malloc(sizeof(struct rtsp_media_t)*(count-N_MEDIA)); if(!rtsp->media_ptr) { sdp_destroy(sdp); return ENOMEM; } memset(rtsp->media_ptr, 0, sizeof(struct rtsp_media_t)*(count-N_MEDIA)); } rtsp->media_count = count; // rfc 2326 C.1.1 Control URL (p80) // If found at the session level, the attribute indicates the URL for aggregate control rtsp->aggregate = rtsp_media_aggregate_control_enable(sdp); rtsp_get_session_uri(sdp, rtsp->aggregate_uri, sizeof(rtsp->aggregate_uri), rtsp->uri, rtsp->baseuri, rtsp->location); for(i = 0; i < count; i++) { media = rtsp_get_media(rtsp, i); //media->cseq = rand(); // RTSP2326 C.1.1 Control URL rtsp_get_media_uri(sdp, i, media->uri, sizeof(media->uri), rtsp->aggregate_uri); n = sdp_media_formats(sdp, i, formats, N_MEDIA_FORMAT); media->avformat_count = n > N_MEDIA_FORMAT ? N_MEDIA_FORMAT : n; for(j = 0; j < media->avformat_count; j++) { media->avformats[j].fmt = formats[j]; } // update media encoding sdp_media_attribute_list(sdp, i, NULL, rtsp_media_onattr, media); } sdp_destroy(sdp); return 0; }
/* v=0 o=mhandley 2890844526 2890842807 IN IP4 126.16.64.4 s=SDP Seminar i=A Seminar on the session description protocol u=http://www.cs.ucl.ac.uk/staff/M.Handley/sdp.03.ps [email protected] (Mark Handley) c=IN IP4 224.2.17.12/127 t=2873397496 2873404696 a=recvonly m=audio 3456 RTP/AVP 0 m=video 2232 RTP/AVP 31 m=whiteboard 32416 UDP WB a=orient:portrait */ int rtsp_client_sdp(struct rtsp_client_context_t* ctx, void* sdp) { int i, count; int formats[N_MEDIA_FORMAT]; struct rtsp_media_t* media; assert(sdp); count = sdp_media_count(sdp); if(count > N_MEDIA) { ctx->media_ptr = (struct rtsp_media_t*)malloc(sizeof(struct rtsp_media_t)*(count-N_MEDIA)); if(!ctx->media_ptr) return -1; memset(ctx->media_ptr, 0, sizeof(struct rtsp_media_t)*(count-N_MEDIA)); } ctx->media_count = count; // rfc 2326 C.1.1 Control URL (p80) // If found at the session level, the attribute indicates the URL for aggregate control ctx->aggregate = rtsp_media_aggregate_control_enable(sdp); rtsp_get_session_uri(sdp, ctx->aggregate_uri, sizeof(ctx->aggregate_uri), ctx->uri, ctx->baseuri, ctx->location); for(i = 0; i < count; i++) { int j, n; media = rtsp_get_media(ctx, i); media->cseq = rand(); // RTSP2326 C.1.1 Control URL rtsp_get_media_uri(sdp, i, media->uri, sizeof(media->uri), ctx->aggregate_uri); n = sdp_media_formats(sdp, i, formats, N_MEDIA_FORMAT); media->avformat_count = n > N_MEDIA_FORMAT ? N_MEDIA_FORMAT : n; for(j = 0; j < media->avformat_count; j++) { media->avformats[j].pt = formats[j]; } // update media encoding sdp_media_attribute_list(sdp, i, NULL, rtsp_media_onattr, media); } return 0; }
static int rtsp_client_media_pause(struct rtsp_client_t *rtsp)
{
int r;
struct rtsp_media_t* media;
assert(0 == rtsp->aggregate);
assert(RTSP_PAUSE == rtsp->state);
assert(rtsp->progress < rtsp->media_count);
media = rtsp_get_media(rtsp, rtsp->progress);
if (NULL == media) return -1;
assert(media && media->uri && media->session.session[0]);
r = rtsp_client_authenrization(rtsp, "PAUSE", media->uri, NULL, 0, rtsp->authenrization, sizeof(rtsp->authenrization));
r = snprintf(rtsp->req, sizeof(rtsp->req), sc_format, media->uri, rtsp->cseq++, media->session.session, rtsp->authenrization, USER_AGENT);
assert(r > 0 && r < sizeof(rtsp->req));
return r == rtsp->handler.send(rtsp->param, media->uri, rtsp->req, r) ? 0 : -1;
}
int rtsp_client_media_pause(struct rtsp_client_context_t *ctx)
{
struct rtsp_media_t* media;
assert(0 == ctx->aggregate);
assert(RTSP_PAUSE == ctx->status);
assert(ctx->progress < ctx->media_count);
media = rtsp_get_media(ctx, ctx->progress);
assert(media && media->uri && media->session);
snprintf(ctx->req, sizeof(ctx->req),
"PAUSE %s RTSP/1.0\r\n"
"CSeq: %u\r\n"
"Session: %s\r\n"
"User-Agent: %s\r\n"
"\r\n",
media->uri, media->cseq++, media->session, USER_AGENT);
return ctx->client.request(ctx->transport, media->uri, ctx->req, strlen(ctx->req), ctx, rtsp_client_media_pause_onreply);
}
int rtsp_client_setup(struct rtsp_client_t* rtsp, const char* sdp)
{
int i, r;
struct rtsp_media_t *media;
if (NULL == sdp || 0 == *sdp)
return -1;
r = rtsp_client_sdp(rtsp, sdp);
if (0 != r)
return r;
for (i = 0; i < rtsp->media_count; i++)
{
media = rtsp_get_media(rtsp, i);
r = rtsp->handler.rtpport(rtsp->param, &media->transport.rtp.u.client_port1);
if (0 != r)
return r;
if (0 == media->transport.rtp.u.client_port1)
{
media->transport.transport = RTSP_TRANSPORT_RTP_TCP;
media->transport.rtp.u.client_port1 = 2 * (unsigned short)i;
media->transport.rtp.u.client_port2 = 2 * (unsigned short)i + 1;
}
else
{
assert(0 == media->transport.rtp.u.client_port1 % 2);
media->transport.transport = RTSP_TRANSPORT_RTP_UDP;
media->transport.rtp.u.client_port2 = media->transport.rtp.u.client_port1 + 1;
}
}
rtsp->state = RTSP_SETUP;
rtsp->progress = 0;
return rtsp_client_media_setup(rtsp);
}
static int rtsp_client_media_setup(struct rtsp_client_t* rtsp)
{
int len;
struct rtsp_media_t *media;
char session[sizeof(media->session.session) + 12], *p;
assert(RTSP_SETUP == rtsp->state);
assert(rtsp->progress < rtsp->media_count);
media = rtsp_get_media(rtsp, rtsp->progress);
if (NULL == media) return -1;
p = rtsp->media[0].session.session;
len = snprintf(session, sizeof(session), (rtsp->aggregate && *p) ? "Session: %s\r\n" : "", p);
assert(len >= 0 && len < sizeof(session));
// TODO: multicast
assert(0 == media->transport.multicast);
len = rtsp_client_authenrization(rtsp, "SETUP", media->uri, NULL, 0, rtsp->authenrization, sizeof(rtsp->authenrization));
len = snprintf(rtsp->req, sizeof(rtsp->req),
RTSP_TRANSPORT_RTP_TCP==media->transport.transport?sc_rtsp_tcp:sc_rtsp_udp,
media->uri, rtsp->cseq++, session, rtsp->authenrization, media->transport.rtp.u.client_port1, media->transport.rtp.u.client_port2, USER_AGENT);
return len == rtsp->handler.send(rtsp->param, media->uri, rtsp->req, len) ? 0 : -1;
}