char *sdp_AddMedia (char **sdp,
const char *type, const char *protocol, int dport,
unsigned pt, bool bw_indep, unsigned bw,
const char *ptname, unsigned clock, unsigned chans,
const char *fmtp)
{
char *newsdp, *ptr;
size_t inlen = strlen (*sdp), outlen = inlen;
/* Some default values */
if (type == NULL)
type = "video";
if (protocol == NULL)
protocol = "RTP/AVP";
assert (pt < 128u);
outlen += snprintf (NULL, 0,
"m=%s %u %s %d\r\n"
"b=TIAS:%u\r\n"
"b=RR:0\r\n",
type, dport, protocol, pt, bw);
newsdp = realloc (*sdp, outlen + 1);
if (newsdp == NULL)
return NULL;
*sdp = newsdp;
ptr = newsdp + inlen;
ptr += sprintf (ptr, "m=%s %u %s %u\r\n",
type, dport, protocol, pt);
if (bw > 0)
ptr += sprintf (ptr, "b=%s:%u\r\n", bw_indep ? "TIAS" : "AS", bw);
ptr += sprintf (ptr, "b=RR:0\r\n");
/* RTP payload type map */
if (ptname != NULL)
{
if ((strcmp (type, "audio") == 0) && (chans != 1))
sdp_AddAttribute (sdp, "rtpmap", "%u %s/%u/%u", pt, ptname, clock,
chans);
else
sdp_AddAttribute (sdp, "rtpmap", "%u %s/%u", pt, ptname, clock);
}
/* Format parameters */
if (fmtp != NULL)
sdp_AddAttribute (sdp, "fmtp", "%u %s", pt, fmtp);
return newsdp;
}
char *vlc_sdp_Start (vlc_object_t *obj, const char *cfgpref,
const struct sockaddr *src, size_t srclen,
const struct sockaddr *addr, size_t addrlen)
{
size_t cfglen = strlen (cfgpref);
if (cfglen > 100)
return NULL;
char varname[cfglen + sizeof ("description")], *subvar = varname + cfglen;
strcpy (varname, cfgpref);
strcpy (subvar, "name");
char *name = var_GetNonEmptyString (obj, varname);
strcpy (subvar, "description");
char *description = var_GetNonEmptyString (obj, varname);
strcpy (subvar, "url");
char *url = var_GetNonEmptyString (obj, varname);
strcpy (subvar, "email");
char *email = var_GetNonEmptyString (obj, varname);
strcpy (subvar, "phone");
char *phone = var_GetNonEmptyString (obj, varname);
char *sdp = sdp_Start (name, description, url, email, phone,
src, srclen, addr, addrlen);
free (name);
free (description);
free (url);
free (email);
free (phone);
if (sdp == NULL)
return NULL;
strcpy (subvar, "cat");
char *cat = var_GetNonEmptyString (obj, varname);
if (cat != NULL)
{
sdp_AddAttribute (&sdp, "cat", "%s", cat);
/* Totally non-standard */
sdp_AddAttribute (&sdp, "x-plgroup", "%s", cat);
free (cat);
}
return sdp;
}
/*****************************************************************************
* SDPGenerateVoD
* FIXME: needs to be merged more?
*****************************************************************************/
char *SDPGenerateVoD( const vod_media_t *p_media, const char *rtsp_url )
{
char *psz_sdp;
assert(rtsp_url != NULL);
/* Check against URL format rtsp://[<ipv6>]:<port>/<path> */
bool ipv6 = strlen( rtsp_url ) > 7 && rtsp_url[7] == '[';
/* Dummy destination address for RTSP */
struct sockaddr_storage dst;
socklen_t dstlen = ipv6 ? sizeof( struct sockaddr_in6 )
: sizeof( struct sockaddr_in );
memset (&dst, 0, dstlen);
dst.ss_family = ipv6 ? AF_INET6 : AF_INET;
#ifdef HAVE_SA_LEN
dst.ss_len = dstlen;
#endif
psz_sdp = vlc_sdp_Start( VLC_OBJECT( p_media->p_vod ), "sout-rtp-",
NULL, 0, (struct sockaddr *)&dst, dstlen );
if( psz_sdp == NULL )
return NULL;
if( p_media->i_length > 0 )
{
lldiv_t d = lldiv( p_media->i_length / 1000, 1000 );
sdp_AddAttribute( &psz_sdp, "range"," npt=0-%lld.%03u", d.quot,
(unsigned)d.rem );
}
sdp_AddAttribute ( &psz_sdp, "control", "%s", rtsp_url );
/* No locking needed, the ES table can't be modified now */
for( int i = 0; i < p_media->i_es; i++ )
{
media_es_t *p_es = p_media->es[i];
rtp_format_t *rtp_fmt = &p_es->rtp_fmt;
const char *mime_major; /* major MIME type */
switch( rtp_fmt->cat )
{
case VIDEO_ES:
mime_major = "video";
break;
case AUDIO_ES:
mime_major = "audio";
break;
case SPU_ES:
mime_major = "text";
break;
default:
continue;
}
sdp_AddMedia( &psz_sdp, mime_major, "RTP/AVP", 0,
rtp_fmt->payload_type, false, 0,
rtp_fmt->ptname, rtp_fmt->clock_rate, rtp_fmt->channels,
rtp_fmt->fmtp );
char *track_url = RtspAppendTrackPath( p_es->rtsp_id, rtsp_url );
if( track_url != NULL )
{
sdp_AddAttribute ( &psz_sdp, "control", "%s", track_url );
free( track_url );
}
}
return psz_sdp;
}
