"of packets that will be sent at a time. It " \
"helps reducing the scheduling load on " \
"heavily-loaded systems." )
-#define RTCP_TEXT N_("RTCP Sender Report")
-#define RTCP_LONGTEXT N_("Send RTCP Sender Report packets")
-#define RTCP_PORT_TEXT N_("RTCP destination port number")
-#define RTCP_PORT_LONGTEXT N_("Sends RTCP packets to this port (0 = auto)")
#define AUTO_MCAST_TEXT N_("Automatic multicast streaming")
#define AUTO_MCAST_LONGTEXT N_("Allocates an outbound multicast address " \
"automatically.")
VLC_TRUE );
add_obsolete_integer( SOUT_CFG_PREFIX "late" );
add_obsolete_bool( SOUT_CFG_PREFIX "raw" );
- add_bool( SOUT_CFG_PREFIX "rtcp", VLC_FALSE, NULL, RTCP_TEXT, RTCP_LONGTEXT,
- VLC_TRUE );
- add_integer( SOUT_CFG_PREFIX "rtcp-port", 0, NULL, RTCP_PORT_TEXT,
- RTCP_PORT_LONGTEXT, VLC_TRUE );
add_bool( SOUT_CFG_PREFIX "auto-mcast", VLC_FALSE, NULL, AUTO_MCAST_TEXT,
AUTO_MCAST_LONGTEXT, VLC_TRUE );
add_bool( SOUT_CFG_PREFIX "udplite", VLC_FALSE, NULL, UDPLITE_TEXT, UDPLITE_LONGTEXT, VLC_TRUE );
"auto-mcast",
"caching",
"group",
- "rtcp",
- "rtcp-port",
"lite",
"cscov",
NULL
static block_t *NewUDPPacket( sout_access_out_t *, mtime_t );
static const char *MakeRandMulticast (int family, char *buf, size_t buflen);
-typedef struct rtcp_sender_t
-{
- size_t length; /* RTCP packet length */
- uint8_t payload[28 + 8 + (2 * 257)];
- int handle; /* RTCP socket handler */
-
- uint32_t packets; /* RTP packets sent */
- uint32_t bytes; /* RTP bytes sent */
- unsigned counter; /* RTP packets sent since last RTCP packet */
-} rtcp_sender_t;
-
typedef struct sout_access_thread_t
{
VLC_COMMON_MEMBERS
int i_group;
block_fifo_t *p_empty_blocks;
-
- rtcp_sender_t rtcp;
} sout_access_thread_t;
struct sout_access_out_sys_t
#define DEFAULT_PORT 1234
#define RTP_HEADER_LENGTH 12
-static int OpenRTCP (vlc_object_t *obj, rtcp_sender_t *rtcp, int rtp_fd,
- int proto, uint16_t dport);
-static void SendRTCP (rtcp_sender_t *obj, const block_t *rtp);
-static void CloseRTCP (rtcp_sender_t *obj);
-
/*****************************************************************************
* Open: open the file
*****************************************************************************/
sout_access_out_sys_t *p_sys;
char *psz_dst_addr = NULL;
- int i_dst_port, i_rtcp_port = 0, proto = IPPROTO_UDP;
+ int i_dst_port, proto = IPPROTO_UDP;
const char *protoname = "UDP";
int i_handle;
}
}
- if (var_GetBool (p_access, SOUT_CFG_PREFIX"rtcp"))
- {
- /* This is really only for the RTP sout plugin.
- * Doing RTCP for non RTP packet is NOT a good idea. */
- i_rtcp_port = var_GetInteger (p_access, SOUT_CFG_PREFIX"rtcp-port");
- if (i_rtcp_port == 0)
- i_rtcp_port = i_dst_port + 1;
- }
-
p_sys->p_thread =
vlc_object_create( p_access, sizeof( sout_access_thread_t ) );
if( !p_sys->p_thread )
p_sys->i_mtu = var_CreateGetInteger( p_this, "mtu" );
p_sys->p_buffer = NULL;
- if (i_rtcp_port && OpenRTCP (VLC_OBJECT (p_access), &p_sys->p_thread->rtcp,
- i_handle, proto, i_rtcp_port))
- {
- msg_Err (p_access, "cannot initialize RTCP sender");
- net_Close (i_handle);
- vlc_object_destroy (p_sys->p_thread);
- free (p_sys);
- return VLC_EGENERIC;
- }
-
if( vlc_thread_create( p_sys->p_thread, "sout write thread", ThreadWrite,
VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
{
if( p_sys->p_buffer ) block_Release( p_sys->p_buffer );
net_Close( p_sys->p_thread->i_handle );
- CloseRTCP (&p_sys->p_thread->rtcp);
vlc_object_detach( p_sys->p_thread );
vlc_object_destroy( p_sys->p_thread );
}
#endif
- SendRTCP (&p_thread->rtcp, p_pk);
-
block_FifoPut( p_thread->p_empty_blocks, p_pk );
i_date_last = i_date;
}
-/*
- * NOTE on RTCP implementation:
- * - there is a single sender (us), no conferencing here! => n = sender = 1,
- * - as such we need not bother to include Receiver Reports,
- * - in unicast case, there is a single receiver => members = 1 + 1 = 2,
- * and obviously n > 25% of members,
- * - in multicast case, we do not want to maintain the number of receivers
- * and we assume it is big (i.e. than 3) because that's what broadcasting is
- * all about,
- * - it is assumed we_sent = true (could be wrong), since we are THE sender,
- * - we always send SR + SDES, while running,
- * - FIXME: we do not implement separate rate limiting for SDES,
- * - we do not implement any profile-specific extensions for the time being.
- */
-static int OpenRTCP (vlc_object_t *obj, rtcp_sender_t *rtcp, int rtp_fd,
- int proto, uint16_t dport)
-{
- uint8_t *ptr;
- int fd;
-
- char src[NI_MAXNUMERICHOST], dst[NI_MAXNUMERICHOST];
- int sport;
-
- rtcp->bytes = rtcp->packets = rtcp->counter = 0;
-
- if (net_GetSockAddress (rtp_fd, src, &sport)
- || net_GetPeerAddress (rtp_fd, dst, NULL))
- return VLC_EGENERIC;
-
- sport++;
- fd = net_OpenDgram (obj, src, sport, dst, dport, AF_UNSPEC, proto);
- if (fd == -1)
- return VLC_EGENERIC;
-
- rtcp->handle = fd;
-
- ptr = (uint8_t *)strchr (src, '%');
- if (ptr != NULL)
- *ptr = '\0'; /* remove scope ID frop IPv6 addresses */
-
- ptr = rtcp->payload;
-
- /* Sender report */
- ptr[0] = 2 << 6; /* V = 2, P = RC = 0 */
- ptr[1] = 200; /* payload type: Sender Report */
- SetWBE (ptr + 2, 6); /* length = 6 (7 double words) */
- memset (ptr + 4, 0, 4); /* SSRC unknown yet */
- SetQWBE (ptr + 8, NTPtime64 ());
- memset (ptr + 16, 0, 12); /* timestamp and counters */
- ptr += 28;
-
- /* Source description */
- uint8_t *sdes = ptr;
- ptr[0] = (2 << 6) | 1; /* V = 2, P = 0, SC = 1 */
- ptr[1] = 202; /* payload type: Source Description */
- uint8_t *lenptr = ptr + 2;
- memset (ptr + 4, 0, 4); /* SSRC unknown yet */
- ptr += 8;
-
- ptr[0] = 1; /* CNAME - mandatory */
- assert (NI_MAXNUMERICHOST <= 256);
- ptr[1] = strlen (src);
- memcpy (ptr + 2, src, ptr[1]);
- ptr += ptr[1] + 2;
-
- static const char tool[] = PACKAGE_STRING;
- ptr[0] = 6; /* TOOL */
- ptr[1] = (sizeof (tool) > 256) ? 255 : (sizeof (tool) - 1);
- memcpy (ptr + 2, tool, ptr[1]);
- ptr += ptr[1] + 2;
-
- while ((ptr - sdes) & 3) /* 32-bits padding */
- *ptr++ = 0;
- SetWBE (lenptr, ptr - sdes);
-
- rtcp->length = ptr - rtcp->payload;
- return VLC_SUCCESS;
-}
-
-static void CloseRTCP (rtcp_sender_t *rtcp)
-{
- if (rtcp->handle == -1)
- return;
-
- uint8_t *ptr = rtcp->payload;
- /* Bye */
- ptr[0] = (2 << 6) | 1; /* V = 2, P = 0, SC = 1 */
- ptr[1] = 203; /* payload type: Bye */
- SetWBE (ptr + 2, 1);
- /* SSRC is already there :) */
-
- /* We are THE sender, so we are more important than anybody else, so
- * we can afford not to check bandwidth constraints here. */
- send (rtcp->handle, rtcp->payload, 8, 0);
- net_Close (rtcp->handle);
-}
-
-static void SendRTCP (rtcp_sender_t *rtcp, const block_t *rtp)
-{
- uint8_t *ptr = rtcp->payload;
-
- if ((rtcp->handle == -1) /* RTCP sender off */
- || (rtp->i_buffer < 12)) /* too short RTP packet */
- return;
-
- /* Updates statistics */
- rtcp->packets++;
- rtcp->bytes += rtp->i_buffer;
- rtcp->counter += rtp->i_buffer;
-
- /* 1.25% rate limit */
- if ((rtcp->counter / 80) < rtcp->length)
- return;
-
- uint32_t last = GetDWBE (ptr + 8); // last RTCP SR send time
- uint64_t now64 = NTPtime64 ();
- if ((now64 >> 32) < (last + 5))
- return; // no more than one SR every 5 seconds
-
- memcpy (ptr + 4, rtp->p_buffer + 8, 4); /* SR SSRC */
- SetQWBE (ptr + 8, now64);
- memcpy (ptr + 16, rtp->p_buffer + 4, 4); /* RTP timestamp */
- SetDWBE (ptr + 20, rtcp->packets);
- SetDWBE (ptr + 24, rtcp->bytes);
- memcpy (ptr + 28 + 4, rtp->p_buffer + 8, 4); /* SDES SSRC */
-
- if (send (rtcp->handle, ptr, rtcp->length, 0) == (ssize_t)rtcp->length)
- rtcp->counter = 0;
-}
projects / vlc / commitdiff