static TMsg *TryParse(leveldb::Iterator *it, void *space) {
assert(it);
assert(space);
TMsg *msg = nullptr;
const auto &key_slice = it->key();
if (key_slice.size() == PrefixSize + 25 || strncmp(key_slice.data(), Prefix, PrefixSize) == 0) {
TKey key;
TVal val;
ParseSlice(key_slice, PrefixSize, key);
ParseSlice(it->value(), 0, val);
msg = new (space) TMsg(key, val);
}
return msg;
}
/*****************************************************************************
* 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_pic = NULL;
const int i_nal_ref_idc = (p_frag->p_buffer[4] >> 5)&0x03;
const int i_nal_type = p_frag->p_buffer[4]&0x1f;
const mtime_t i_frag_dts = p_frag->i_dts;
const mtime_t i_frag_pts = p_frag->i_pts;
if( p_sys->b_slice && ( !p_sys->b_sps || !p_sys->b_pps ) )
{
block_ChainRelease( p_sys->p_frame );
msg_Warn( p_dec, "waiting for SPS/PPS" );
/* Reset context */
p_sys->slice.i_frame_type = 0;
p_sys->p_frame = NULL;
p_sys->b_frame_sps = false;
p_sys->b_frame_pps = false;
p_sys->b_slice = false;
cc_Flush( &p_sys->cc_next );
}
if( ( !p_sys->b_sps || !p_sys->b_pps ) &&
i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
{
p_sys->b_slice = true;
/* Fragment will be discarded later on */
}
else if( i_nal_type >= NAL_SLICE && i_nal_type <= NAL_SLICE_IDR )
{
slice_t slice;
bool b_new_picture;
ParseSlice( p_dec, &b_new_picture, &slice, i_nal_ref_idc, i_nal_type, p_frag );
/* */
if( b_new_picture && p_sys->b_slice )
p_pic = OutputPicture( p_dec );
/* */
p_sys->slice = slice;
p_sys->b_slice = true;
}
else if( i_nal_type == NAL_SPS )
{
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
p_sys->b_frame_sps = true;
PutSPS( p_dec, p_frag );
/* Do not append the SPS because we will insert it on keyframes */
p_frag = NULL;
}
else if( i_nal_type == NAL_PPS )
{
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
p_sys->b_frame_pps = true;
PutPPS( p_dec, p_frag );
/* Do not append the PPS because we will insert it on keyframes */
p_frag = NULL;
}
else if( i_nal_type == NAL_AU_DELIMITER ||
i_nal_type == NAL_SEI ||
( i_nal_type >= 13 && i_nal_type <= 18 ) )
{
if( p_sys->b_slice )
p_pic = OutputPicture( p_dec );
/* Parse SEI for CC support */
if( i_nal_type == NAL_SEI )
{
ParseSei( p_dec, p_frag );
}
else if( i_nal_type == NAL_AU_DELIMITER )
{
if( p_sys->p_frame && (p_sys->p_frame->i_flags & BLOCK_FLAG_PRIVATE_AUD) )
{
block_Release( p_frag );
p_frag = NULL;
}
else
{
p_frag->i_flags |= BLOCK_FLAG_PRIVATE_AUD;
}
}
}
/* Append the block */
if( p_frag )
block_ChainAppend( &p_sys->p_frame, p_frag );
*pb_ts_used = false;
if( p_sys->i_frame_dts <= VLC_TS_INVALID &&
p_sys->i_frame_pts <= VLC_TS_INVALID )
{
p_sys->i_frame_dts = i_frag_dts;
p_sys->i_frame_pts = i_frag_pts;
*pb_ts_used = true;
}
return p_pic;
}
