+static int Demux2( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ int i_ret, i_id;
+ uint32_t i_code;
+ block_t *p_pkt;
+
+ i_ret = ps_pkt_resynch( p_demux->s, &i_code );
+ if( i_ret < 0 )
+ {
+ return 0;
+ }
+ else if( i_ret == 0 )
+ {
+ if( !p_sys->b_lost_sync )
+ msg_Warn( p_demux, "garbage at input, trying to resync..." );
+
+ p_sys->b_lost_sync = VLC_TRUE;
+ return 1;
+ }
+
+ if( p_sys->b_lost_sync ) msg_Warn( p_demux, "found sync code" );
+ p_sys->b_lost_sync = VLC_FALSE;
+
+ if( ( p_pkt = ps_pkt_read( p_demux->s, i_code ) ) == NULL )
+ {
+ return 0;
+ }
+ if( (i_id = ps_pkt_id( p_pkt )) >= 0xc0 )
+ {
+ ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
+ if( !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
+ {
+ tk->i_last_pts = p_pkt->i_pts;
+ }
+ }
+ block_Release( p_pkt );
+ return 1;
+}
+
+static void FindLength( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ int64_t i_current_pos = -1, i_size = 0, i_end = 0;
+ int i;
+
+ if( !var_CreateGetInteger( p_demux, "ps-trust-timestamps" ) )
+ return;
+
+ if( p_sys->i_length == -1 ) /* First time */
+ {
+ i_current_pos = stream_Tell( p_demux->s );
+ i_size = stream_Size( p_demux->s );
+ i_end = __MAX( 0, __MIN( 100000, i_size ) );
+ stream_Seek( p_demux->s, stream_Size( p_demux->s ) - i_end );
+
+ while( Demux2( p_demux ) > 0 && !p_demux->b_die ) ;
+ }
+
+ for( i = 0; i < PS_TK_COUNT; i++ )
+ {
+ ps_track_t *tk = &p_sys->tk[i];
+ if( tk->b_seen && tk->i_first_pts > 0 && tk->i_last_pts > 0 )
+ if( tk->i_last_pts > tk->i_first_pts )
+ {
+ int64_t i_length = (int64_t)tk->i_last_pts - tk->i_first_pts;
+ if( i_length > p_sys->i_length )
+ {
+ p_sys->i_length = i_length;
+ p_sys->i_time_track = i;
+ }
+ }
+ }
+ if( i_current_pos >= 0 ) stream_Seek( p_demux->s, i_current_pos );
+}
+