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vlc/modules/mux/rtp/rtcp.c
Rémi Denis-Courmont 99fab9089e Don't include config.h from the headers - refs #297. 
Missing some cases that I could not test.
Also ffmpeg/chroma.c is locked, so I can but leave it broken.
Fix is for the remaining modules is obvious and the issue is easy to detect.
2008-01-23 21:50:58 +00:00

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/*****************************************************************************
* rtcp.c: RTP/RTCP source file
*****************************************************************************
* Copyright (C) 2005-2007 M2X
*
* $Id$
*
* Authors: Jean-Paul Saman <jpsaman #_at_# videolan dot org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#include <netinet/in.h>
#include <sys/time.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc/vlc.h>
#include <vlc_bits.h>
#include <vlc_block.h>
#include "rtp.h"
#include "rtcp.h"
void send_RTCP( vlc_object_t *p_this, rtcp_event_t );
void rtcp_schedule( vlc_object_t *p_this, mtime_t, rtcp_event_t );
/* SDES support functions */
static int SDES_client_item_add( rtcp_client_t *p_client, int i_item, char *psz_name )
{
rtcp_SDES_item_t *p_item = NULL;
p_item = (rtcp_SDES_item_t *) malloc( sizeof( rtcp_SDES_item_t ) );
if( !p_item )
return VLC_ENOMEM;
p_item->u_type = i_item;
p_item->psz_data = strdup( psz_name );
p_item->i_index = p_client->i_items + 1;;
INSERT_ELEM( p_client->pp_sdes, p_client->i_items,
p_item->i_index, p_item );
return VLC_EGENERIC;
}
static int SDES_client_item_del( rtcp_client_t *p_client )
{
uint32_t i = 0;
for( i=0; i < p_client->i_items; i++ )
{
rtcp_SDES_item_t *p_old = p_client->pp_sdes[i];
REMOVE_ELEM( p_client->pp_sdes, p_client->i_items, i );
p_client->i_items--;
if( p_old->psz_data)
free( p_old->psz_data );
free( p_old );
}
return VLC_SUCCESS;
}
int rtcp_add_client( vlc_object_t *p_this, uint32_t u_ssrc, uint32_t *i_pos )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
rtcp_client_t *p_client = NULL;
vlc_mutex_lock( &p_rtcp->object_lock );
p_client = (rtcp_client_t*) malloc( sizeof(rtcp_client_t) );
if( !p_client )
return VLC_ENOMEM;
p_client->i_index = p_rtcp->i_clients + 1;
p_client->b_deleted = VLC_FALSE;
*i_pos = p_client->i_index ;
INSERT_ELEM( p_rtcp->pp_clients, p_rtcp->i_clients,
p_client->i_index, p_client );
p_rtcp->i_clients++;
p_rtcp->u_clients++;
vlc_mutex_unlock( &p_rtcp->object_lock );
return VLC_SUCCESS;
}
int rtcp_del_client( vlc_object_t *p_this, uint32_t u_ssrc )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
uint32_t i_pos = 0;
vlc_mutex_lock( &p_rtcp->object_lock );
if( p_rtcp->pf_find_client( p_this, u_ssrc, &i_pos ) == VLC_SUCCESS )
{
rtcp_client_t *p_old = p_rtcp->pp_clients[i_pos];
p_old->b_deleted = VLC_TRUE;
p_old->i_timeout = 5 * (p_rtcp->i_date - p_rtcp->i_last_date) +
p_rtcp->i_next_date;
p_rtcp->u_clients--;
/* BYE message is sent by rtcp_destroy_client() */
}
vlc_mutex_unlock( &p_rtcp->object_lock );
return VLC_SUCCESS;
}
/* rtcp_cleanup_clients should not be called too often */
int rtcp_cleanup_clients( vlc_object_t *p_this )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
uint32_t i = 0;
vlc_mutex_lock( &p_rtcp->object_lock );
for( i=0; i < p_rtcp->i_clients; i++ )
{
rtcp_client_t *p_old = p_rtcp->pp_clients[i];
if( p_old->b_deleted &&
(p_old->i_timeout > mdate()) )
{
REMOVE_ELEM( p_rtcp->pp_clients, p_rtcp->i_clients, i );
p_rtcp->i_clients--;
SDES_client_item_del( p_old );
free( p_old );
}
}
vlc_mutex_unlock( &p_rtcp->object_lock );
return VLC_SUCCESS;
}
/* Close communication with clients and release allocated objects */
int rtcp_destroy_clients( vlc_object_t *p_this )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
uint32_t i = 0;
for( i=0; i < p_rtcp->i_clients; i++ )
{
rtcp_pkt_t *pkt = NULL;
rtcp_client_t *p_old = p_rtcp->pp_clients[i];
p_rtcp->pf_del_client( p_this, p_old->u_ssrc );
pkt = rtcp_pkt_new( p_this, RTCP_BYE );
if( pkt )
{
block_t *p_block = NULL;
p_block = rtcp_encode_BYE( p_this, pkt, strdup("server is leaving") );
/* FIXME:
* if( p_block )
* send_RTCP( p_this, p_block );
*/
}
}
/* wait till all clients have been signalled */
while( p_rtcp->i_clients != 0 )
{
p_rtcp->pf_cleanup_clients( p_this );
msleep( 500 );
}
return VLC_SUCCESS;
}
/* rtcp_find_client should be called with the object lock held.
* vlc_mutex_lock( &p_rtcp->obj_lock );
*/
int rtcp_find_client( vlc_object_t *p_this, uint32_t u_ssrc, uint32_t *i_pos )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
uint32_t i = 0;
for( i=0; i < p_rtcp->i_clients; i++ )
{
if( p_rtcp->pp_clients[i]->u_ssrc == u_ssrc )
{
*i_pos = i;
return VLC_SUCCESS;
}
}
*i_pos = -1;
return VLC_EGENERIC;
}
/*--------------------------------------------------------------------------
* rtcp_interval - Calculate the interval in seconds for sending RTCP packets.
*--------------------------------------------------------------------------
*/
uint64_t rtcp_interval( vlc_object_t *p_this, uint64_t u_bandwidth, uint32_t u_ssrc,
vlc_bool_t b_sender, vlc_bool_t b_first )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
rtcp_client_t *p_client = NULL;
uint32_t i_rtcp_min = 5; /* seconds */
uint32_t i_pos = 0;
double i_bandwidth = u_bandwidth;
const double i_compensation = 2.71828 - 1.5;
double i_interval = 0;
int n = p_rtcp->i_clients;
if( b_first )
i_rtcp_min = (i_rtcp_min >> 1);
if( (double)(p_rtcp->u_active) <= (double)(p_rtcp->u_clients * 0.25) )
{
if( b_sender )
{
i_bandwidth = i_bandwidth * 0.25;
n = p_rtcp->u_active;
}
else
{
i_bandwidth = i_bandwidth * ( 1 - 0.25 );
n = n - p_rtcp->u_active;
}
}
/* calculate average time between reports */
p_client = p_rtcp->pf_find_client( p_this, u_ssrc, &i_pos );
if( !p_client )
return -1;
i_interval = p_client->p_stats->u_avg_pkt_size * ( n / i_bandwidth );
if( i_interval < i_rtcp_min )
i_interval = i_rtcp_min;
i_interval = i_interval * ( drand48() + 0.5 );
i_interval = (double) (i_interval / i_compensation);
return (uint64_t)i_interval;
}
/*--------------------------------------------------------------------------
* rtcp_expire - decides to sent an RTCP report or a BYE record
*--------------------------------------------------------------------------
*/
void rtcp_expire( vlc_object_t *p_this, rtcp_event_t rtcp_event, uint64_t u_bandwidth,
uint32_t u_ssrc, vlc_bool_t b_sender, vlc_bool_t *b_first )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
rtcp_client_t *p_client = NULL;
rtcp_stats_t *p_stats = NULL;
mtime_t i_interval = 0;
uint32_t i_pos = 0;
p_client = p_rtcp->pf_find_client( p_this, u_ssrc, &i_pos );
if( !p_client )
return;
p_stats = (rtcp_stats_t*) p_client->p_stats;
i_interval = (mtime_t) rtcp_interval( p_this, u_bandwidth,
u_ssrc, b_sender, *b_first );
p_rtcp->i_next_date = p_rtcp->i_last_date + i_interval;
switch( rtcp_event )
{
case EVENT_BYE:
if( p_rtcp->i_next_date <= p_rtcp->i_date )
send_RTCP( p_this, rtcp_event );
else
rtcp_schedule( p_this, p_rtcp->i_next_date, rtcp_event );
break;
case EVENT_REPORT:
if( p_rtcp->i_next_date <= p_rtcp->i_date )
{
send_RTCP( p_this, rtcp_event );
/* Magic numbers are from RFC 3550 page 92
* 1.0/16.0 = 0.0625 and
* 15.0/16.0 = 0.9375
*/
p_stats->u_avg_pkt_size = (uint64_t)
( (double) ( (double)p_stats->u_sent_pkt_size / ((double)0.0625) ) +
( ((double)0.9357) * p_stats->u_avg_pkt_size ) );
/* recalculate */
p_rtcp->i_last_date = p_rtcp->i_date;
i_interval = rtcp_interval( p_this, u_bandwidth,
u_ssrc, b_sender, *b_first );
rtcp_schedule( p_this, p_rtcp->i_next_date + i_interval, rtcp_event );
*b_first = VLC_FALSE;
}
else
{
rtcp_schedule( p_this, p_rtcp->i_next_date, rtcp_event );
}
break;
}
p_rtcp->i_date = p_rtcp->i_next_date;
}
/*--------------------------------------------------------------------------
* Local functions prototoypes
*--------------------------------------------------------------------------
*/
static int rtcp_decode_SR( vlc_object_t *p_this, rtcp_pkt_t *p_pkt );
static int rtcp_decode_RR( vlc_object_t *p_this, rtcp_pkt_t *p_pkt );
static int rtcp_decode_SR( vlc_object_t *p_this, rtcp_pkt_t *p_pkt );
static int rtcp_decode_SDES( vlc_object_t *p_this, rtcp_pkt_t *p_pkt );
static int rtcp_decode_BYE( vlc_object_t *p_this, rtcp_pkt_t *p_pkt );
static int rtcp_decode_APP( vlc_object_t *p_this, rtcp_pkt_t *p_pkt );
/*--------------------------------------------------------------------------
* Local functions
*--------------------------------------------------------------------------
*/
static int rtcp_decode_SR( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
unsigned int i = 0;
if( !p_pkt )
return VLC_EGENERIC;
msg_Dbg( p_this, "decoding record: SR" );
/* parse sender info */
p_pkt->u_payload_type = RTCP_SR;
p_pkt->report.sr.ntp_timestampH = bs_read( p_rtcp->bs, 32 );
p_pkt->report.sr.ntp_timestampL = bs_read( p_rtcp->bs, 32 );
p_pkt->report.sr.rtp_timestamp = bs_read( p_rtcp->bs, 32 );
p_pkt->report.sr.u_pkt_count = bs_read( p_rtcp->bs, 32 ); /*sender*/
p_pkt->report.sr.u_octet_count = bs_read( p_rtcp->bs, 32 ); /*sender*/
/* parse report block */
for( i=0; i < p_pkt->u_report; i++ )
{
rtcp_client_t *p_client = NULL;
uint32_t i_pos = 0;
uint32_t u_ssrc = 0;
int result = 0;
u_ssrc = bs_read( p_rtcp->bs, 32 );
result = p_rtcp->pf_find_client( p_this, u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
{
result = p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
return VLC_ENOMEM;
}
vlc_mutex_lock( &p_rtcp->object_lock );
p_client = p_rtcp->pp_clients[i_pos];
p_client->p_stats->u_SR_received++;
p_client->p_stats->u_pkt_count++;
p_client->p_stats->u_octet_count++;
msg_Dbg( p_this, "SR received %d, packet count %d, octect count %d, SSRC count %d",
p_client->p_stats->u_SR_received,
p_client->p_stats->u_pkt_count,
p_client->p_stats->u_octet_count,
p_pkt->u_ssrc );
p_client->p_stats->u_fraction_lost = bs_read( p_rtcp->bs, 8 );
p_client->p_stats->u_pkt_lost = bs_read( p_rtcp->bs, 24 );
p_client->p_stats->u_highest_seq_no = bs_read( p_rtcp->bs, 32 );
p_client->p_stats->u_jitter = bs_read( p_rtcp->bs, 32 );
p_client->p_stats->u_last_SR = bs_read( p_rtcp->bs, 32 );
p_client->p_stats->u_delay_since_last_SR = (mtime_t) bs_read( p_rtcp->bs, 32 );
/* Magic numbers are from RFC 3550 page 92
* 1.0/16.0 = 0.0625 and
* 15.0/16.0 = 0.9375
*/
p_client->p_stats->u_avg_pkt_size = (uint64_t)
( (double)((double)p_client->p_stats->u_sent_pkt_size * (double)(0.0625)) +
((double)(0.9375) * p_client->p_stats->u_avg_pkt_size) );
msg_Dbg( p_this, "fract lost %d, packet lost %d, highest seqno %d, "
"jitter %d, last SR %d, delay %lld",
p_client->p_stats->u_fraction_lost,
p_client->p_stats->u_pkt_lost,
p_client->p_stats->u_highest_seq_no,
p_client->p_stats->u_jitter,
p_client->p_stats->u_last_SR,
p_client->p_stats->u_delay_since_last_SR );
p_client = NULL;
vlc_mutex_unlock( &p_rtcp->object_lock );
}
return VLC_SUCCESS;
}
static int rtcp_decode_RR( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
unsigned int i = 0;
if( !p_pkt )
return VLC_EGENERIC;
msg_Dbg( p_this, "decoding record: RR" );
for( i=0; i < p_pkt->u_report; i++ )
{
rtcp_client_t *p_client = NULL;
uint32_t i_pos = 0;
uint32_t u_ssrc = 0;
int result = 0;
u_ssrc = bs_read( p_rtcp->bs, 32 );
result = p_rtcp->pf_find_client( p_this, u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
{
result = p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
return VLC_ENOMEM;
}
vlc_mutex_lock( &p_rtcp->object_lock );
p_client = p_rtcp->pp_clients[i_pos];
p_client->p_stats->u_RR_received++;
msg_Dbg( p_this, "RR received %d, SSRC %d",
p_client->p_stats->u_RR_received, u_ssrc );
p_client->p_stats->u_fraction_lost = bs_read( p_rtcp->bs, 8 );
p_client->p_stats->u_pkt_lost = bs_read( p_rtcp->bs, 24 );
p_client->p_stats->u_highest_seq_no = bs_read( p_rtcp->bs, 32 );
p_client->p_stats->u_jitter = bs_read( p_rtcp->bs, 32 );
p_client->p_stats->u_last_SR = bs_read( p_rtcp->bs, 32 );
p_client->p_stats->u_delay_since_last_SR = (mtime_t) bs_read( p_rtcp->bs, 32 );
/* Magic numbers are from RFC 3550 page 92
* 1.0/16.0 = 0.0625 and
* 15.0/16.0 = 0.9375
*/
p_client->p_stats->u_avg_pkt_size = (uint64_t)
( (double)((double)p_client->p_stats->u_sent_pkt_size * (double)(0.0625)) +
((double)(0.9375) * p_client->p_stats->u_avg_pkt_size) );
msg_Dbg( p_this, "fract lost %d, packet lost %d, highest seqno %d, "
"jitter %d, last SR %d, delay %lld",
p_client->p_stats->u_fraction_lost,
p_client->p_stats->u_pkt_lost,
p_client->p_stats->u_highest_seq_no,
p_client->p_stats->u_jitter,
p_client->p_stats->u_last_SR,
p_client->p_stats->u_delay_since_last_SR );
p_client = NULL;
vlc_mutex_unlock( &p_rtcp->object_lock );
}
return VLC_SUCCESS;
}
static int rtcp_decode_SDES( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
unsigned int i = 0;
if( !p_pkt )
return VLC_EGENERIC;
msg_Dbg( p_this, "decoding record: SDES" );
for( i = 0; i < p_pkt->u_report; i++ )
{
rtcp_client_t *p_client = NULL;
uint32_t i_pos = 0;
uint32_t u_ssrc = 0;
uint8_t u_item = 0;
uint8_t u_length = 0;
int i = 0;
int result = 0;
u_ssrc = bs_read( p_rtcp->bs, 32 );
result = p_rtcp->pf_find_client( p_this, u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
{
result = p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
return VLC_ENOMEM;
}
vlc_mutex_lock( &p_rtcp->object_lock );
p_client = p_rtcp->pp_clients[i_pos];
u_item = bs_read( p_rtcp->bs, 8 );
switch( u_item )
{
case RTCP_SDES_CNAME:
case RTCP_SDES_NAME:
case RTCP_SDES_EMAIL:
case RTCP_SDES_PHONE:
case RTCP_SDES_LOC:
case RTCP_SDES_TOOL:
case RTCP_SDES_NOTE:
{
char psz_name[255];
u_length = bs_read( p_rtcp->bs, 8 );
for( i = 0 ; i < u_length; i++ )
{
psz_name[i] = bs_read( p_rtcp->bs, 8 );
}
SDES_client_item_add( p_client, u_item, psz_name );
}
break;
case RTCP_SDES_PRIV: /* ignoring these */
{
uint8_t u_prefix_len = 0;
uint8_t u_length = 0;
char psz_prefix_name[255];
char psz_name[255];
u_length = bs_read( p_rtcp->bs, 8 );
u_prefix_len = bs_read( p_rtcp->bs, 8 );
if( u_prefix_len > 254 )
u_prefix_len = 254;
for( i=0 ; i < u_prefix_len; i++ )
{
psz_prefix_name[i] = bs_read( p_rtcp->bs, 8 );
}
psz_prefix_name[255] = '\0';
SDES_client_item_add( p_client, u_item, psz_prefix_name );
for( i=0 ; i < u_length; i++ )
{
psz_name[i] = bs_read( p_rtcp->bs, 8 );
}
psz_name[255] = '\0';
SDES_client_item_add( p_client, u_item, psz_name );
}
break;
default:
return VLC_EGENERIC;
}
/* Magic numbers are from RFC 3550 page 92
* 1.0/16.0 = 0.0625 and
* 15.0/16.0 = 0.9375
*/
p_client->p_stats->u_avg_pkt_size = (uint64_t)
( (double)((double)p_client->p_stats->u_sent_pkt_size * (double)(0.0625)) +
((double)(0.9375) * p_client->p_stats->u_avg_pkt_size) );
p_client = NULL;
vlc_mutex_unlock( &p_rtcp->object_lock );
}
return VLC_SUCCESS;
}
static int rtcp_decode_BYE( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
uint32_t u_ssrc = 0;
uint8_t u_length = 0;
int i = 0;
if( !p_pkt )
return VLC_EGENERIC;
msg_Dbg( p_this, "decoding record: BYE" );
u_ssrc = bs_read( p_rtcp->bs, 32 );
p_rtcp->pf_del_client( p_this, u_ssrc );
u_length = p_pkt->u_length-1;
for( i = 0 ; i < u_length; i++ )
{
u_ssrc = bs_read( p_rtcp->bs, 8 );
p_rtcp->pf_del_client( p_this, u_ssrc );
}
return VLC_SUCCESS;
}
static int rtcp_decode_APP( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
rtcp_client_t *p_client = NULL;
char psz_name[4];
char* psz_data = NULL;
uint32_t u_ssrc = 0;
uint32_t i_pos = 0;
uint32_t i = 0;
int result = 0;
if( !p_pkt )
return VLC_EGENERIC;
msg_Dbg( p_this, "decoding record: APP" );
u_ssrc = bs_read( p_rtcp->bs, 32 );
result = p_rtcp->pf_find_client( p_this, u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
{
result = p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
return VLC_ENOMEM;
}
vlc_mutex_lock( &p_rtcp->object_lock );
p_client = p_rtcp->pp_clients[i_pos];
for( i = 0 ; i < 4; i++ )
{
psz_name[i] = bs_read( p_rtcp->bs, 8 );
}
psz_name[4] = '\0';
p_pkt->u_payload_type = RTCP_APP;
p_pkt->report.app.psz_prefix = strdup( psz_name );
p_pkt->report.app.u_prefix_len = 4;
p_pkt->u_length -= 4;
psz_data = (char *) malloc( p_pkt->u_length );
if( !psz_data ) {
vlc_mutex_unlock( &p_rtcp->object_lock );
return VLC_EGENERIC;
}
for( i = 0; i < p_pkt->u_length; i-- )
{
psz_data[i] = bs_read( p_rtcp->bs, 8 );
}
psz_data[p_pkt->u_length] = '\0';
p_pkt->report.app.psz_data = strdup( psz_data );
p_pkt->report.app.u_length = p_pkt->u_length;
p_client = NULL;
vlc_mutex_unlock( &p_rtcp->object_lock );
/* Just ignore this packet */
return VLC_SUCCESS;
}
/* Decode RTCP packet
* Decode incoming RTCP packet and inspect the records types.
*/
int rtcp_pkt_decode( vlc_object_t *p_this, rtcp_pkt_t *p_pkt, block_t *p_block )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
if( !p_pkt && !p_block )
return VLC_EGENERIC;
bs_init( p_rtcp->bs, p_block->p_buffer, p_block->i_buffer );
p_pkt->u_version = bs_read( p_rtcp->bs, 2 );
p_pkt->b_padding = bs_read( p_rtcp->bs, 1 ) ? VLC_TRUE : VLC_FALSE;
p_pkt->u_report = bs_read( p_rtcp->bs, 5 );
p_pkt->u_payload_type = bs_read( p_rtcp->bs, 8 );
p_pkt->u_length = bs_read( p_rtcp->bs, 16 );
if( p_pkt->u_payload_type != RTCP_SDES )
p_pkt->u_ssrc = bs_read( p_rtcp->bs, 32 );
msg_Dbg( p_this, "New RTCP packet: version %d, padding %s, count %d, "
"type %d, length %d, SSRC %d",
p_pkt->u_version,
p_pkt->b_padding ? "true" : "false",
p_pkt->u_report,
p_pkt->u_payload_type,
p_pkt->u_length,
p_pkt->u_ssrc );
while( !bs_eof( p_rtcp->bs ) )
{
uint32_t i_pos = 0;
switch( p_pkt->u_payload_type )
{
case RTCP_SR:
if( p_rtcp->pf_find_client( p_this, p_pkt->u_ssrc, &i_pos ) == VLC_EGENERIC )
p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
rtcp_decode_SR( p_this, p_pkt );
break;
case RTCP_RR:
if( p_rtcp->pf_find_client( p_this, p_pkt->u_ssrc, &i_pos ) == VLC_EGENERIC )
p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
rtcp_decode_RR( p_this, p_pkt );
break;
case RTCP_SDES:
if( p_rtcp->pf_find_client( p_this, p_pkt->u_ssrc, &i_pos ) == VLC_EGENERIC )
p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
rtcp_decode_SDES( p_this, p_pkt );
break;
case RTCP_BYE:
rtcp_decode_BYE( p_this, p_pkt );
#if 0
if( p_rtcp->pf_find_sender( p_this, pkt->u_ssrc, &i_pos ) == VLC_EGENERIC )
p_rtcp->pf_del_sender( p_this, p_pkt->u_ssrc );
#endif
if( p_rtcp->pf_find_client( p_this, p_pkt->u_ssrc, &i_pos ) == VLC_EGENERIC )
p_rtcp->pf_del_client( p_this, p_pkt->u_ssrc );
if( p_rtcp->u_active < p_rtcp->u_members )
{
rtcp_event_t event = EVENT_BYE;
p_rtcp->i_next_date = p_rtcp->i_date +
(mtime_t) ( (p_rtcp->u_active / p_rtcp->u_members) *
(p_rtcp->i_next_date - p_rtcp->i_date) );
p_rtcp->i_last_date = p_rtcp->i_date -
(mtime_t)
( (mtime_t)(p_rtcp->u_active / p_rtcp->u_members) *
(p_rtcp->i_date - p_rtcp->i_last_date) );
/* schedule for next period */
rtcp_schedule( VLC_OBJECT(p_rtcp), p_rtcp->i_next_date, event );
p_rtcp->u_members = p_rtcp->u_active;
}
else p_rtcp->u_members++;
break;
case RTCP_APP:
if( p_rtcp->pf_find_client( p_this, p_pkt->u_ssrc, &i_pos ) == VLC_EGENERIC )
p_rtcp->pf_add_client( p_this, p_pkt->u_ssrc, &i_pos );
rtcp_decode_APP( p_this, p_pkt );
break;
default:
return VLC_EGENERIC;
}
}
return VLC_SUCCESS;
}
/*
* Create RTCP records for reporting to server.
*/
rtcp_pkt_t *rtcp_pkt_new( vlc_object_t *p_this, int type )
{
rtcp_pkt_t *p_pkt = NULL;
p_pkt = (rtcp_pkt_t *) malloc( sizeof( rtcp_pkt_t ) );
if( !p_pkt )
return NULL;
memset( p_pkt, 0 , sizeof( rtcp_pkt_t ) );
p_pkt->u_version = 2;
p_pkt->u_payload_type = type;
p_pkt->u_length = RTCP_HEADER_LEN;
switch( type )
{
case RTCP_SR:
p_pkt->u_length += sizeof(rtcp_SR_t);
break;
case RTCP_RR:
p_pkt->u_length += sizeof(rtcp_RR_t);
break;
case RTCP_SDES:
p_pkt->u_length += sizeof(rtcp_SDES_t);
if( p_pkt->report.sdes.pp_items )
p_pkt->u_length += p_pkt->report.sdes.u_items;
break;
case RTCP_BYE:
p_pkt->u_length += sizeof(rtcp_BYE_t);
break;
case RTCP_APP:
p_pkt->u_length += sizeof(rtcp_APP_t);
break;
default:
free(p_pkt);
return NULL;
}
return p_pkt;
}
void rtcp_pkt_del( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
if( !p_pkt )
return;
switch( p_pkt->u_payload_type )
{
case RTCP_SR:
case RTCP_RR:
break;
case RTCP_SDES:
if( p_pkt->report.sdes.pp_items )
{
uint32_t i = 0;
for( i = 0; i < p_pkt->report.sdes.u_items; i++ )
{
rtcp_SDES_item_t *p_old =
p_pkt->report.sdes.pp_items[i];
REMOVE_ELEM( p_pkt->report.sdes.pp_items,
p_pkt->report.sdes.u_items, i );
p_pkt->report.sdes.u_items--;
if( p_old->psz_data )
free( p_old->psz_data );
free( p_old );
}
}
break;
case RTCP_BYE:
break;
case RTCP_APP:
if( p_pkt->report.app.psz_prefix )
free( p_pkt->report.app.psz_prefix );
if( p_pkt->report.app.psz_data )
free( p_pkt->report.app.psz_data );
break;
default:
msg_Err( p_this, "unknown RTCP packet type %d: "
"possible leaking of memory.",
p_pkt->u_payload_type );
break;
}
free( p_pkt );
}
block_t *rtcp_encode_SR( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
mtime_t ntp_time;
bs_t bits, *s = &bits;
block_t *p_block = NULL;
rtcp_stats_t *p_stats = NULL;
rtcp_client_t *p_client = NULL;
uint32_t i_pos = 0;
int result = 0;
if( p_pkt->u_payload_type != RTCP_SR )
return NULL;
/* FIXME: Maybe this should be a buffer pool instead */
p_block = block_New( p_this, p_pkt->u_length );
if( !p_block )
return NULL;
bs_init( s, p_block->p_buffer, p_block->i_buffer );
/* Fill in header */
bs_write( s, 2, p_pkt->u_version );
bs_write( s, 1, 0 ); /* padding */
bs_write( s, 5, p_pkt->u_report );
bs_write( s, 8, p_pkt->u_payload_type );
bs_write( s, 16, p_pkt->u_length );
bs_write( s, 32, p_pkt->u_ssrc );
/* sender info */
ntp_time = mdate();
bs_write( s, 32, ((unsigned int)(ntp_time>>32)) ); /* ntp_timestampH */
bs_write( s, 32, ((unsigned int)ntp_time) );/* ntp_timestampL */
/* FIXME: Make sure to generate a good RTP server timestamp.
p_pkt->report.sr.rtp_timestamp = htonl(
(unsigned int) ((double)ntp_time.tv_sec +
(double)ntp_time.tv_usec/1000000.) * p_mux->rate
+ session->start_rtptime ); */
bs_write( s, 32, p_pkt->report.sr.rtp_timestamp );
bs_write( s, 32, p_pkt->report.sr.u_pkt_count );
bs_write( s, 32, p_pkt->report.sr.u_octet_count );
/* report block */
result = p_rtcp->pf_find_client( p_this, p_pkt->u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
{
msg_Err( p_this, "SR: SSRC identifier doesn't exists", p_pkt->u_ssrc );
free( p_block );
return NULL;
}
vlc_mutex_lock( &p_rtcp->object_lock );
p_client = p_rtcp->pp_clients[i_pos];
p_stats = p_client->p_stats;
if( !p_stats ) {
msg_Err( p_this, "SR: SSRC identifier doesn't exists", p_pkt->u_ssrc );
free( p_block );
return NULL;
}
bs_write( s, 32, p_stats->l_dest_SSRC );
bs_write( s, 8, p_stats->u_fraction_lost );
bs_write( s, 24, p_stats->u_pkt_lost );
bs_write( s, 32, p_stats->u_highest_seq_no );
bs_write( s, 32, p_stats->u_jitter );
bs_write( s, 32, p_stats->u_last_SR );
bs_write( s, 32, p_stats->u_delay_since_last_SR );
p_client = NULL;
vlc_mutex_unlock( &p_rtcp->object_lock );
/* possible SR extension */
return p_block;
}
block_t *rtcp_encode_RR( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
rtcp_t *p_rtcp = (rtcp_t *) p_this;
bs_t bits, *s = &bits;
block_t *p_block = NULL;
rtcp_stats_t *p_stats = NULL;
rtcp_client_t *p_client = NULL;
uint32_t i_pos = 0;
int result = 0;
if( p_pkt->u_payload_type != RTCP_RR )
return NULL;
/* FIXME: Maybe this should be a buffer pool instead */
p_block = block_New( p_this, p_pkt->u_length );
if( !p_block )
return NULL;
bs_init( s, p_block->p_buffer, p_block->i_buffer );
/* Fill in header */
bs_write( s, 2, p_pkt->u_version );
bs_write( s, 1, 0 ); /* padding */
bs_write( s, 5, p_pkt->u_report );
bs_write( s, 8, p_pkt->u_payload_type );
bs_write( s, 16, p_pkt->u_length );
bs_write( s, 32, p_pkt->u_ssrc );
/* report block */
result = p_rtcp->pf_find_client( p_this, p_pkt->u_ssrc, &i_pos );
if( result == VLC_EGENERIC )
{
msg_Err( p_this, "RR: SSRC identifier doesn't exists", p_pkt->u_ssrc );
free( p_block );
return NULL;
}
vlc_mutex_lock( &p_rtcp->object_lock );
p_client = p_rtcp->pp_clients[i_pos];
p_stats = p_client->p_stats;
if( !p_stats ) {
msg_Err( p_this, "RR: SSRC identifier doesn't exists", p_pkt->u_ssrc );
free( p_block );
return NULL;
}
bs_write( s, 32, p_stats->l_dest_SSRC );
bs_write( s, 8, p_stats->u_fraction_lost );
bs_write( s, 24, p_stats->u_pkt_lost );
bs_write( s, 32, p_stats->u_highest_seq_no );
bs_write( s, 32, p_stats->u_jitter );
bs_write( s, 32, p_stats->u_last_RR );
bs_write( s, 32, p_stats->u_delay_since_last_RR );
p_client = NULL;
vlc_mutex_unlock( &p_rtcp->object_lock );
/* possible RR extension */
return p_block;
}
block_t *rtcp_encode_SDES( vlc_object_t *p_this, rtcp_pkt_t *p_pkt )
{
bs_t bits, *s = &bits;
block_t *p_block = NULL;
uint32_t i_chunks;
if( p_pkt->u_payload_type != RTCP_SDES )
return NULL;
/* FIXME: Maybe this should be a buffer pool instead */
p_block = block_New( p_this, p_pkt->u_length );
if( !p_block )
return NULL;
bs_init( s, p_block->p_buffer, p_block->i_buffer );
/* Fill in header */
bs_write( s, 2, p_pkt->u_version );
bs_write( s, 1, 0 ); /* padding */
bs_write( s, 5, p_pkt->u_report ); /* Number of SSRC/CSRC chunks */
bs_write( s, 8, p_pkt->u_payload_type );
bs_write( s, 16, p_pkt->u_length );
bs_write( s, 32, p_pkt->u_ssrc );
/* fill in record */
for( i_chunks = 0; i_chunks < p_pkt->u_report; i_chunks++ )
{
uint32_t i_item;
for( i_item = 0 ; i_item < p_pkt->report.sdes.u_items; i_item++ )
{
uint32_t i_count = strlen( p_pkt->report.sdes.pp_items[i_item]->psz_data );
uint8_t u_octet = i_count / 8; /* Octect count ??*/
rtcp_SDES_item_t *p_item = p_pkt->report.sdes.pp_items[i_item];
uint32_t i_pos, i_pad, i_padding;
bs_write( s, 8, p_item->u_type );
bs_write( s, 8, u_octet );
for( i_pos = 0; i_pos < i_count; i_pos++ )
{
/* FIXME: must be UTF 8 encoded */
bs_write( s, 8, p_item->psz_data[i_pos] );
}
/* do we need padding to 32 bit boundary? */
i_padding = 0;
if( ((i_count + 2) % 4) != 0 )
i_padding = (i_count + 2) - (((i_count + 2) % 4) << 2);
for( i_pad = 0; i_pad < i_padding; i_pad++ )
{
bs_write( s, 8, 0 );
}
}
}
return p_block;
}
block_t *rtcp_encode_BYE( vlc_object_t *p_this, rtcp_pkt_t *p_pkt, char *psz_reason )
{
bs_t bits, *s = &bits;
block_t *p_block = NULL;
uint32_t i_count = strlen( psz_reason );
uint8_t u_octet = i_count / 8; /* Octect count ??*/
int32_t i_pos, i_pad, i_padding;
if( p_pkt->u_payload_type != RTCP_BYE )
return NULL;
/* FIXME: Maybe this should be a buffer pool instead */
p_block = block_New( p_this, p_pkt->u_length );
if( !p_block )
return NULL;
bs_init( s, p_block->p_buffer, p_block->i_buffer );
/* Fill in header */
bs_write( s, 2, p_pkt->u_version );
bs_write( s, 1, 0 ); /* padding */
bs_write( s, 5, p_pkt->u_report ); /* Number of SSRC/CSRC chunks */
bs_write( s, 8, p_pkt->u_payload_type );
bs_write( s, 16, p_pkt->u_length );
bs_write( s, 32, p_pkt->u_ssrc );
/* Give reason for leaving */
//FIXME: bs_write( s, 8, p_item->u_type );
bs_write( s, 8, u_octet );
for( i_pos = 0; i_pos < i_count; i_pos++ )
{
/* FIXME: must be UTF 8 encoded */
bs_write( s, 8, psz_reason[i_pos] );
}
/* do we need padding to 32 bit boundary? */
i_padding = 0;
if( ((i_count + 2) % 4) != 0 )
i_padding = (i_count + 2) - (((i_count + 2) % 4) << 2);
for( i_pad = 0; i_pad < i_padding; i_pad++ )
{
bs_write( s, 8, 0 );
}
return p_block;
}
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