Merge branch '1074-number-of-objects-signaling-correction-in-omasa-low-rate' into 'main' (b62698e9) · Commits · IVAS Codec Public Collaboration / IVAS Codec

lib_com/options.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -178,6 +178,7 @@
		#define NONBE_FIX_MC_LFE_LPF /* Dlb: Adding the LFE LPF filter back for MC content. */
		#define NONBE_FIX_1052_SBA_EXT /* Dlb: SBA external output support */

		#define NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR /* Nok: issue 1074 fixing number of objects signaling in OMASA low rate */
		/* ##################### End NON-BE switches ########################### */

		/* ################## End DEVELOPMENT switches ######################### */

lib_dec/ivas_init_dec.c

+18 −0

Original line number	Diff line number	Diff line
		@@ -399,12 +399,30 @@ ivas_error ivas_dec_setup(

		if ( st_ivas->nchan_ism > 0 )
		{
		#ifdef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		/* the input_ivas_format should be MASA_ISM_FORMAT, but we cannot initialize it now */
		/* info about the number of objects:
		'00' - MASA format at the encoder
		'01' - MASA_ISM_FORMAT at the encoder, with 4 objects
		'10' - MASA_ISM_FORMAT at the encoder, with 3 objects
		'11' - MASA_ISM_FORMAT at the encoder, with 1 or 2 objects
		reading if 1 or 2 objects is performed later
		*/
		st_ivas->nchan_ism = 5 - st_ivas->nchan_ism;
		if ( st_ivas->nchan_transport == 1 && st_ivas->nchan_ism == 2 )
		{
		st_ivas->nchan_ism = 1;
		}
		/* for MASA_ISM_FORMAT at input the number of MASA transport channels is always 2 and the corresponding bit is not used here*/
		#else
		/* the input_ivas_format should be MASA_ISM_FORMAT, but we cannot initialize it now */
		if ( st_ivas->nchan_transport == 2 && st_ivas->nchan_ism == 3 )
		{
		st_ivas->nchan_ism = 4;
		}

		/* for MASA_ISM_FORMAT at input the number of MASA transport channels is always 2 */
		#endif
		st_ivas->nchan_transport = 2;
		element_mode_flag = 1;
		}

lib_dec/ivas_masa_dec.c

+126 −76

Original line number	Diff line number	Diff line
		@@ -151,6 +151,52 @@ ivas_error ivas_masa_decode(
		{
		if ( !( ivas_format == MC_FORMAT && st_ivas->mc_mode == MC_MODE_MCMASA ) )
		{
		#ifdef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		if ( ivas_format == MASA_FORMAT )
		{
		/* re-read the number of objects, needed in case of bad frame */
		st_ivas->nchan_ism = 5 - ( st_ivas->bit_stream[( ivas_total_brate / FRAMES_PER_SEC ) - 3] + 2 * st_ivas->bit_stream[( ivas_total_brate / FRAMES_PER_SEC ) - 2] );
		}
		if ( ivas_format == MASA_FORMAT && st_ivas->nchan_ism != 5 )
		{
		/* there was OMASA in the input */
		hMasa->config.input_ivas_format = MASA_ISM_FORMAT;
		if ( st_ivas->nchan_ism < 3 )
		{
		/* was read in ivas_init_dec() to distinguish between 1 and 2 objects */
		if ( st_ivas->bit_stream[( ivas_total_brate / FRAMES_PER_SEC ) - 1] == 0 )
		{
		st_ivas->nchan_ism = 1;
		}
		st->next_bit_pos -= MASA_TRANSP_BITS;
		*nb_bits_read += MASA_TRANSP_BITS;

		/* the two reserved bits were already read in ivas_init_dec()*/
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		*nb_bits_read += MASA_HEADER_BITS;
		/* read number of directions */
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		( *nb_bits_read )++;
		hMasa->config.numberOfDirections = (uint8_t) ( byteBuffer + 1 );
		}
		else
		{
		/* if there are 3 or 4 objects the number of transport channels bit is given to MASA format
		and used to read number of directions*/
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		( *nb_bits_read )++;
		hMasa->config.numberOfDirections = (uint8_t) ( byteBuffer + 1 );

		/* the two reserved bits were already read in ivas_init_dec()*/
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		*nb_bits_read += MASA_HEADER_BITS;
		}
		}
		else
		{
		#endif
		if ( ivas_format != MASA_ISM_FORMAT )
		{
		/* number of transport channels is always 2 for MASA_ISM format */
		@@ -249,13 +295,14 @@ ivas_error ivas_masa_decode(
		}
		}

		#ifndef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		/* read 2 bits:
		'00' - MASA format at the encoder
		'01' - MASA_ISM_FORMAT at the encoder, with 1 object
		'10' - MASA_ISM_FORMAT at the encoder, with 2 objects
		'11' - MASA_ISM_FORMAT at the encoder, with 3 or 4 objects
		reading if 3 or 4 object is performed later
		'11' - MASA_ISM_FORMAT at the encoder, with 3 or 4 objects; reading if 3 or 4 object is performed later
		*/
		#endif
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		byteBuffer = byteBuffer + 2 * st->bit_stream[( st->next_bit_pos )--];

		@@ -273,6 +320,9 @@ ivas_error ivas_masa_decode(
		byteBuffer = st->bit_stream[( st->next_bit_pos )--];
		( *nb_bits_read )++;
		hMasa->config.numberOfDirections = (uint8_t) ( byteBuffer + 1 );
		#ifdef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		}
		#endif
		}
		else
		{

lib_enc/ivas_masa_enc.c

+34 −4

Original line number	Diff line number	Diff line
		@@ -420,6 +420,18 @@ ivas_error ivas_masa_encode(
		{
		if ( ivas_format == MASA_ISM_FORMAT && ism_mode == ISM_MODE_NONE )
		{
		#ifdef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		/* use the MASA number of transport channels bit to signal if there are 1 or 2 objects */
		if ( nchan_ism == 1 \|\| nchan_ism == 2 )
		{
		push_next_indice( hMetaData, nchan_ism - 1, MASA_TRANSP_BITS );
		}
		else
		{
		/* for 3 or 4 objects write already the number of MASA directions */
		push_next_indice( hMetaData, hQMetaData->no_directions - 1, MASA_TRANSP_BITS );
		}
		#else
		/* use the MASA number of transport channels bit to signal if there are 3 or 4 objects */
		if ( nchan_ism == 4 )
		{
		@@ -429,6 +441,7 @@ ivas_error ivas_masa_encode(
		{
		push_next_indice( hMetaData, 0, MASA_TRANSP_BITS );
		}
		#endif
		}
		else
		{
		@@ -440,6 +453,16 @@ ivas_error ivas_masa_encode(

		if ( ivas_format == MASA_ISM_FORMAT && ism_mode == ISM_MODE_NONE )
		{
		#ifdef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		if ( nchan_ism >= 3 ) /* if 3 or 4 objects */
		{
		push_next_indice( hMetaData, 5 - nchan_ism, MASA_HEADER_BITS );
		}
		else
		{
		push_next_indice( hMetaData, 3, MASA_HEADER_BITS );
		}
		#else
		if ( nchan_ism <= 3 )
		{
		push_next_indice( hMetaData, nchan_ism, MASA_HEADER_BITS );
		@@ -448,6 +471,7 @@ ivas_error ivas_masa_encode(
		{
		push_next_indice( hMetaData, nchan_ism - 1, MASA_HEADER_BITS );
		}
		#endif
		hQMetaData->metadata_max_bits -= MASA_HEADER_BITS;
		}
		else
		@@ -457,10 +481,16 @@ ivas_error ivas_masa_encode(
		push_next_indice( hMetaData, 0, MASA_HEADER_BITS );
		hQMetaData->metadata_max_bits -= MASA_HEADER_BITS;
		}
		#ifdef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		if ( !( ivas_format == MASA_ISM_FORMAT && ism_mode == ISM_MODE_NONE && nchan_ism > 2 ) )
		{
		#endif
		/* write number of directions */
		push_next_indice( hMetaData, hQMetaData->no_directions - 1, 1 );
		hQMetaData->metadata_max_bits -= 1;

		#ifdef NONBE_FIX_1074_NOBJ_SIGNAL_OMASA_LBR
		}
		#endif
		/* write subframe mode */
		push_next_indice( hMetaData, hQMetaData->q_direction[0].cfg.nblocks == 1 ? 1 : 0, MASA_SUBFRAME_BITS );
		hQMetaData->metadata_max_bits -= MASA_SUBFRAME_BITS;

Admin message