- return p_block;
-}
-
-/*****************************************************************************
- * BlockParseRTP/BlockRTP:
- *****************************************************************************/
-static block_t *BlockParseRTP( access_t *p_access, block_t *p_block )
-{
- int i_rtp_version;
- int i_CSRC_count;
- int i_payload_type;
- int i_skip = 0;
- int i_sequence_number = 0;
- int i_extention_flag;
- int i_extention_length = 0;
-
- if( p_block == NULL )
- return NULL;
-
- if( p_block->i_buffer < RTP_HEADER_LEN )
- goto trash;
-
- /* Parse the header and make some verifications.
- * See RFC 1889 & RFC 2250. */
- i_rtp_version = ( p_block->p_buffer[0] & 0xC0 ) >> 6;
- i_CSRC_count = p_block->p_buffer[0] & 0x0F;
- i_extention_flag = p_block->p_buffer[0] & 0x10;
- i_payload_type = p_block->p_buffer[1] & 0x7F;
- i_sequence_number = (p_block->p_buffer[2] << 8 ) + p_block->p_buffer[3];
-
- if ( i_rtp_version != 2 )
- msg_Dbg( p_access, "RTP version is %u, should be 2", i_rtp_version );
-
- if( i_payload_type == 14 )
- i_skip = 4;
- else if( i_payload_type != 33 && i_payload_type != 32 )
- msg_Dbg( p_access, "unsupported RTP payload type (%u)", i_payload_type );
- if( i_extention_flag )
- i_extention_length = 4 +
- 4 * ( (p_block->p_buffer[14] << 8) + p_block->p_buffer[15] );
-
- /* Skip header + CSRC extension field n*(32 bits) + extention */
- i_skip += RTP_HEADER_LEN + 4*i_CSRC_count + i_extention_length;
-
- if( i_skip >= p_block->i_buffer )
- goto trash;
-
- /* Return the packet without the RTP header. */
- p_block->i_buffer -= i_skip;
- p_block->p_buffer += i_skip;
-
-#define RTP_SEQ_NUM_SIZE 65536
- /* Detect RTP packet loss through tracking sequence numbers.
- * See RFC 1889. */
- if( p_access->p_sys->i_sequence_number == -1 )
- p_access->p_sys->i_sequence_number = i_sequence_number;
-
- if( ((p_access->p_sys->i_sequence_number + 1) % RTP_SEQ_NUM_SIZE) != i_sequence_number )