- /* Read data */
- p_block = block_New( p_access, p_sys->i_mtu );
- p_block->i_buffer = net_Read( p_access, p_sys->fd, NULL,
- p_block->p_buffer, p_sys->i_mtu,
- VLC_FALSE );
- if( p_block->i_buffer <= 0 )
- {
- block_Release( p_block );
- return NULL;
- }
-
- if( (p_block->i_buffer >= p_sys->i_mtu) && p_sys->b_auto_mtu &&
- p_sys->i_mtu < 32767 )
- {
- /* Increase by 100% */
- p_sys->i_mtu *= 2;
- msg_Dbg( p_access, "increasing MTU to %d", p_sys->i_mtu );
- }
-
- return p_block;
-}
-
-/*****************************************************************************
- * BlockTCP: Framed RTP/AVP packet reception for COMEDIA
- * Still an I-D (draft-ietf-avt-rtp-framing-contrans-06) - subject to change.
- *****************************************************************************/
-static block_t *BlockTCP( access_t *p_access )
-{
- access_sys_t *p_sys = p_access->p_sys;
- block_t *p_block = p_sys->p_partial_frame;
- int i_read;
-
- if( p_block == NULL )
- {
- /* MTU should always be 65535 in this case */
- p_sys->p_partial_frame = p_block = block_New( p_access, 65537 );
- if (p_block == NULL)
- return NULL;
- }
-
- /* Read RTP framing */
- if (p_block->i_buffer < 2)
- {
- /* FIXME: not very efficient */
- i_read = net_Read( p_access, p_sys->fd, NULL,
- p_block->p_buffer + p_block->i_buffer,
- 2 - p_block->i_buffer, VLC_FALSE );
- if( i_read <= 0 )
- goto error;
-
- p_block->i_buffer += i_read;
- if (p_block->i_buffer < 2)
- return NULL;
- }
-
- uint16_t framelen = GetWLE( p_block->p_buffer );
- /* Read RTP frame */
- if( framelen > 0 )
- {
- i_read = net_Read( p_access, p_sys->fd, NULL,
- p_block->p_buffer + p_block->i_buffer,
- 2 + framelen - p_block->i_buffer, VLC_FALSE );
- if( i_read <= 0 )
- goto error;
-
- p_block->i_buffer += i_read;
- }
-
- if( p_block->i_buffer < (2 + framelen) )
- return NULL; // incomplete frame
-
- /* Hide framing from RTP layer */
- p_block->p_buffer += 2;
- p_block->i_buffer -= 2;
- p_sys->p_partial_frame = NULL;
- return p_block;
-
-error:
- block_Release( p_block );
- p_sys->p_partial_frame = NULL;
- return NULL;
-}
-
-
-/*
- * rtp_ChainInsert - insert a p_block in the chain and
- * look at the sequence numbers.
- */
-static inline vlc_bool_t rtp_ChainInsert( access_t *p_access, block_t *p_block )
-{
- access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
- block_t *p_prev = NULL;
- block_t *p = p_sys->p_end;
- uint16_t i_new = (uint16_t) p_block->i_dts;
- uint16_t i_tmp = 0;
-
- if( !p_sys->p_list )
- {
- p_sys->p_list = p_block;
- p_sys->p_end = p_block;
- return VLC_TRUE;
- }
- /* walk through the queue from top down since the new packet is in
- most cases just appended to the end */
-
- for( ;; )
- {
- i_tmp = i_new - (uint16_t) p->i_dts;
-
- if( !i_tmp ) /* trash duplicate */
- break;
-
- if ( i_tmp < 32768 )
- { /* insert after this block ( i_new > p->i_dts ) */
- p_block->p_next = p->p_next;
- p->p_next = p_block;
- p_block->p_prev = p;
- if (p_prev)
- {
- p_prev->p_prev = p_block;
- msg_Dbg(p_access, "RTP reordering: insert after %d, new %d",
- (uint16_t) p->i_dts, i_new );
- }
- else
- {
- p_sys->p_end = p_block;
- }
- return VLC_TRUE;
- }
- if( p == p_sys->p_list )
- { /* we've reached bottom of chain */
- i_tmp = p_sys->i_last_seqno - i_new;
- if( !p_access->info.b_prebuffered || (i_tmp > 32767) )
- {
- msg_Dbg(p_access, "RTP reordering: prepend %d before %d",
- i_new, (uint16_t) p->i_dts );
- p_block->p_next = p;
- p->p_prev = p_block;
- p_sys->p_list = p_block;
- return VLC_TRUE;
- }
-
- if( !i_tmp ) /* trash duplicate */
- break;
-
- /* reordering failed - append the packet to the end of queue */
- msg_Dbg(p_access, "RTP: sequence changed (or buffer too small) "
- "new: %d, buffer %d...%d", i_new, (uint16_t) p->i_dts,
- (uint16_t) p_sys->p_end->i_dts);
- p_sys->p_end->p_next = p_block;
- p_block->p_prev = p_sys->p_end;
- p_sys->p_end = p_block;
- return VLC_TRUE;
- }
- p_prev = p;
- p = p->p_prev;
- }
- block_Release( p_block );
- return VLC_FALSE;
-}
-
-/*****************************************************************************
- * 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_extension_flag = 0;
- int i_extension_length = 0;
- uint16_t i_sequence_number = 0;
-
- if( p_block == NULL )