/*****************************************************************************
* ParseNALBlock: parses annexB type NALs
* All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
*****************************************************************************/
static block_t *ParseNALBlock(decoder_t *p_dec, bool *pb_ts_used, block_t *p_frag)
{
decoder_sys_t *p_sys = p_dec->p_sys;
block_t * p_ret = NULL;
if(unlikely(p_frag->i_buffer < 5))
{
msg_Warn(p_dec,"NAL too small");
block_Release(p_frag);
return NULL;
}
if(p_frag->p_buffer[4] & 0x80)
{
msg_Warn(p_dec,"Forbidden zero bit not null, corrupted NAL");
block_ChainRelease(p_sys->p_frame);
block_Release(p_frag);
p_sys->p_frame = NULL;
p_sys->pp_frame_last = &p_sys->p_frame;
return NULL;
}
/* Get NALU type */
uint8_t i_nal_type = hevc_getNALType(&p_frag->p_buffer[4]);
if (i_nal_type < HEVC_NAL_VPS)
{
/* NAL is a VCL NAL */
p_ret = ParseVCL(p_dec, i_nal_type, p_frag);
}
else
{
p_ret = ParseNonVCL(p_dec, i_nal_type, p_frag);
if (p_sys->p_frame)
{
p_frag = p_ret;
if( (p_ret = block_ChainGather(p_sys->p_frame)) )
{
p_sys->p_frame = NULL;
p_sys->pp_frame_last = &p_sys->p_frame;
p_ret->p_next = p_frag;
}
else p_ret = p_frag;
}
}
*pb_ts_used = false;
return p_ret;
}
/*****************************************************************************
* ParseNALBlock: parses annexB type NALs
* All p_frag blocks are required to start with 0 0 0 1 4-byte startcode
*****************************************************************************/
static block_t *ParseNALBlock(decoder_t *p_dec, bool *pb_ts_used, block_t *p_frag)
{
decoder_sys_t *p_sys = p_dec->p_sys;
if(unlikely(p_frag->i_buffer < 5))
{
msg_Warn(p_dec,"NAL too small");
block_Release(p_frag);
*pb_ts_used = false;
return NULL;
}
if(p_frag->p_buffer[4] & 0x80)
{
msg_Warn(p_dec,"Forbidden zero bit not null, corrupted NAL");
block_Release(p_frag);
*pb_ts_used = false;
return GatherAndValidateChain(OutputQueues(p_sys, false)); /* will drop */
}
/* Get NALU type */
block_t * p_output = NULL;
uint8_t i_nal_type = hevc_getNALType(&p_frag->p_buffer[4]);
if (i_nal_type < HEVC_NAL_VPS)
{
/* NAL is a VCL NAL */
p_output = ParseVCL(p_dec, i_nal_type, p_frag);
if (p_output && (p_output->i_flags & BLOCK_FLAG_CORRUPTED))
msg_Info(p_dec, "Waiting for VPS/SPS/PPS");
}
else
{
p_output = ParseNonVCL(p_dec, i_nal_type, p_frag);
}
p_output = GatherAndValidateChain(p_output);
*pb_ts_used = (p_output != NULL);
return p_output;
}
