static void dirac_ReleaseBlockAndEncap( block_t *p_block )
{
fake_block_t *p_fake = (fake_block_t *)p_block;
free( dirac_RemoveBlockEncap( p_block ) );
p_fake->p_orig->pf_release( p_fake->p_orig );
free( p_fake );
}
/***
* Encapsulation (packetization) suitable for all muxing standards
* maps [DataUnit] -> EncapsulationUnit
*/
static block_t *dirac_BuildEncapsulationUnit( decoder_t *p_dec, block_t *p_block )
{
decoder_sys_t *p_sys = p_dec->p_sys;
assert(p_block->i_buffer >= 13 && 0x42424344 == GetDWBE( p_block->p_buffer ));
if( p_sys->i_eu_pts <= VLC_TS_INVALID && p_sys->i_eu_dts <= VLC_TS_INVALID )
{
/* earliest block with pts/dts gets to set the pts/dts for the dated
* encapsulation unit as a whole */
/* NB, the 'earliest block' criteria is aribtary */
if( p_block->i_pts > VLC_TS_INVALID || p_block->i_dts > VLC_TS_INVALID )
{
p_sys->i_eu_pts = p_block->i_pts;
p_sys->i_eu_dts = p_block->i_dts;
}
}
/* inpectdataunit also updates flags for the EU.
* - if this is the first block in the EU, then it hasn't been added
* to the chain yet (so, p_block will become the front of the chain
* - otherwise, use the flags of the chain (first block) */
block_t *p_eu = p_sys->p_eu ? p_sys->p_eu : p_block;
int i_block = dirac_InspectDataUnit( p_dec, &p_block, p_eu);
if( !p_block )
{
/* block has been discarded during inspection */
/* becareful, don't discard anything that is dated,
* as this needs to go into the timegen loop. set
* the DIRAC_DISCARD block flag, and it'll be dropped
* at output time */
return NULL;
}
block_ChainLastAppend( &p_sys->pp_eu_last, p_block );
dirac_block_encap_t *p_dbe = dirac_GetBlockEncap( p_block );
#ifdef SANITIZE_PREV_PARSE_OFFSET
/* fixup prev_parse_offset to point to the last data unit
* to arrive */
if( p_dbe )
{
SetDWBE( p_block->p_buffer + 9, p_sys->u_eu_last_npo );
p_sys->u_eu_last_npo = p_dbe->u_last_next_offset;
}
#endif
if( i_block != DIRAC_DU_ENDS_EU )
{
/* encapsulation unit not ended */
return NULL;
}
/* gather up encapsulation unit, reassociating the final
* private state with the gathered block */
block_t *p_eu_last = (block_t*) p_sys->pp_eu_last - offsetof( block_t, p_next );
p_dbe = dirac_RemoveBlockEncap( p_eu_last );
uint8_t u_parse_code = p_block->p_buffer[4];
/* gather up the encapsulation unit */
p_block = block_ChainGather( p_sys->p_eu );
assert( p_block ); /* block_ChainGather doesn't define when it frees chain */
p_block->i_flags |= DIRAC_NON_DATED;
if( p_dbe )
{
dirac_AddBlockEncap( &p_block, p_dbe );
if( dirac_isPicture( u_parse_code ) ) p_block->i_flags &= ~DIRAC_NON_DATED;
}
p_sys->p_eu = NULL;
p_sys->pp_eu_last = &p_sys->p_eu;
return p_block;
}
