static void set_frame_params (const FrameParams& my_frame_params, dirac_decoder_t *decoder)
{
TEST (decoder != NULL);
dirac_frameparams_t *frame_params = &decoder->frame_params;
TEST (decoder->state == STATE_PICTURE_AVAIL ||
decoder->state == STATE_PICTURE_START);
frame_params->ftype = (dirac_frame_type_t)my_frame_params.FSort();
frame_params->fnum = my_frame_params.FrameNum();
return;
}
static void set_frame_params (const FrameParams& my_frame_params, dirac_decoder_t *decoder)
{
TEST (decoder != NULL);
dirac_frameparams_t *frame_params = &decoder->frame_params;
TEST (decoder->state == STATE_PICTURE_AVAIL ||
decoder->state == STATE_PICTURE_START);
frame_params->ftype = my_frame_params.FSort().IsIntra() ? INTRA_FRAME : INTER_FRAME;
frame_params->rtype = my_frame_params.FSort().IsRef() ? REFERENCE_FRAME : NON_REFERENCE_FRAME;
frame_params->fnum = my_frame_params.FrameNum();
return;
}
void FrameCompressor::WriteFrameHeader( const FrameParams& fparams )
{
BasicOutputManager& frame_header_op = m_encparams.BitsOut().FrameOutput().HeaderOutput();
// Write the frame start code
unsigned char frame_start[5] = { START_CODE_PREFIX_BYTE0,
START_CODE_PREFIX_BYTE1,
START_CODE_PREFIX_BYTE2,
START_CODE_PREFIX_BYTE3,
IFRAME_START_CODE };
switch(fparams.FSort())
{
case I_frame:
frame_start[4] = IFRAME_START_CODE;
break;
case L1_frame:
frame_start[4] = L1FRAME_START_CODE;
break;
case L2_frame:
frame_start[4] = L2FRAME_START_CODE;
break;
default:
// dirac_ASSERTM (false, "Frame type is I_frame or L1_frame or L2_frame");
break;
}
frame_header_op.OutputBytes((char *)frame_start, 5);
// Write the frame number
UnsignedGolombCode(frame_header_op , fparams.FrameNum());
//write whether the frame is m_skipped or not
frame_header_op.OutputBit( m_skipped );
if (!m_skipped)
{// If we're not m_skipped, then we write the rest of the metadata
// Write the expiry time relative to the frame number
UnsignedGolombCode( frame_header_op , fparams.ExpiryTime() );
// Write the frame sort
UnsignedGolombCode( frame_header_op , (unsigned int) fparams.FSort() );
if (fparams.FSort() != I_frame)
{
// If not an I-frame, write how many references there are
UnsignedGolombCode( frame_header_op , (unsigned int) fparams.Refs().size() );
// For each reference, write the reference number relative to the frame number
for ( size_t i=0 ; i<fparams.Refs().size() ; ++i )
GolombCode( frame_header_op , fparams.Refs()[i]-fparams.FrameNum() );
// Indicate whether or not there is global motion vector data
frame_header_op.OutputBit( m_use_global );
// Indicate whether or not there is block motion vector data
frame_header_op.OutputBit( m_use_block_mv );
// If there is global but no block motion vector data, indicate the
// prediction mode to use for the whole frame
if ( m_use_global && !m_use_block_mv )
{
UnsignedGolombCode( frame_header_op , (unsigned int) m_global_pred_mode );
}
}
}// ?m_skipped
}
