Few functions in ivas_masa_dec.c converted to fixed point (f5d43a27) · Commits · SA4 / Audio / IVAS BASOP

lib_com/ivas_masa_com.c

+152 −0

Original line number	Diff line number	Diff line
		@@ -478,6 +478,158 @@ void ivas_masa_set_coding_config(
		return;
		}

		#ifdef IVAS_FLOAT_FIXED
		/*---------------------------------------------------------------
		* ivas_masa_set_coding_config_fx()
		*
		* Sets MASA codec parameters based on bitrate, number of directions,
		* and other metadata properties.
		---------------------------------------------------------------/

		void ivas_masa_set_coding_config_fx(
		MASA_CODEC_CONFIG config, / i/o: MASA coding config structure */
		Word16 band_mapping, / o : Band mapping used */
		const Word32 ivas_total_brate, /* i : IVAS total bitrate */
		const Word16 nchan_transport, /* i : number of transport channels (mono/stereo) */
		const UWord8 isMcMasa /* i : toggle for selecting mcMASA specific config */
		)
		{
		Word16 i;
		UWord8 nbands;
		UWord8 nTwoDirBands;
		const Word16 *masa_bits_table;

		/* When coming into this function, these values should be already set:
		* joinedSubframes;
		* useCoherence;
		* numberOfDirections;
		*/

		/* Setup coding parameters based on the bitrate, transport channel count, subframe metadata information,
		* and number of directions in metadata. */
		nbands = 0;
		nTwoDirBands = 0;
		i = 0;
		move16();

		/* First select correct bit budget table */
		masa_bits_table = masa_bits;
		move16();

		test();
		IF( isMcMasa )
		{
		masa_bits_table = mcmasa_bits;
		move16();
		}
		ELSE IF( LT_32( ivas_total_brate, IVAS_48k ) && EQ_16( nchan_transport, 2 ) )
		{
		masa_bits_table = masa_bits_LR_stereo;
		move16();
		}

		WHILE( nbands == 0 && LT_16( i, IVAS_NUM_ACTIVE_BRATES ) )
		{
		IF( LE_32( ivas_total_brate, ivas_brate_tbl[i + SIZE_IVAS_BRATE_TBL - IVAS_NUM_ACTIVE_BRATES] ) )
		{
		Word16 idx_bands;

		test();
		test();
		IF( LT_32( ivas_total_brate, IVAS_48k ) && EQ_16( nchan_transport, 2 ) && GT_16( i, 3 ) )
		{
		/* because it uses the bitallocation for the lower bit rates from 'masa_bits_LR_stereo' and it has 4 elements */
		i = 3;
		move16();
		}
		idx_bands = i;
		move16();

		IF( config->numberOfDirections > 1 )
		{
		nTwoDirBands = config->joinedSubframes ? masa_twodir_bands_joined[i] : masa_twodir_bands[i];

		IF( ( GT_32( ivas_total_brate, IVAS_96k ) && !config->joinedSubframes ) \|\| ( GT_32( ivas_total_brate, IVAS_80k ) && config->joinedSubframes ) )
		{
		idx_bands = sub( idx_bands, 1 );
		}
		}

		IF( config->joinedSubframes )
		{
		nbands = masa_joined_nbands[idx_bands];
		}
		ELSE
		{
		nbands = masa_nbands[idx_bands];
		}

		config->max_metadata_bits = masa_bits_table[i];
		move16();

		IF( EQ_32( ivas_total_brate, IVAS_64k ) && config->numberOfDirections > 1 )
		{
		/* At 64k, we increase metadata bit budget when there is two directions present. */
		config->max_metadata_bits += MASA_EXTRA_BAND_META_BITS;
		}

		IF( ( ( EQ_32( ivas_total_brate, IVAS_32k ) && EQ_16( nchan_transport, 2 ) ) \|\| EQ_32( ivas_total_brate, IVAS_48k ) ) && config->joinedSubframes )
		{
		/* At 32k and 48k, we increase metadata bit budget when joinedSubframes. */
		config->max_metadata_bits += ( MASA_SMALL_INC_META_BITS );
		}
		}
		i = add( i, 1 );
		}
		config->numCodingBands = nbands;
		config->numTwoDirBands = nTwoDirBands;

		IF( config->joinedSubframes == TRUE )
		{
		config->mergeRatiosOverSubframes = FALSE;
		}
		ELSE
		{
		config->mergeRatiosOverSubframes = TRUE;
		}

		/* Setup frequency band mapping based on the number of used coding bands */
		SWITCH( config->numCodingBands )
		{
		case 5:
		Copy( MASA_band_mapping_24_to_5, band_mapping, 5 + 1 );
		BREAK;
		case 8:
		Copy( MASA_band_mapping_24_to_8, band_mapping, 8 + 1 );
		BREAK;
		case 12:
		Copy( MASA_band_mapping_24_to_12, band_mapping, 12 + 1 );
		BREAK;
		case 18:
		Copy( MASA_band_mapping_24_to_18, band_mapping, 18 + 1 );
		BREAK;
		case MASA_FREQUENCY_BANDS:
		/* With input count of bands, no mapping is needed but for unified processing later, we store normal mapping */
		FOR( i = 0; i < MASA_FREQUENCY_BANDS + 1; i++ )
		{
		band_mapping[i] = i;
		move16();
		}
		BREAK;
		default:
		assert( 0 && "Error: The number of MASA coding bands is not supported" );
		}

		config->useCoherence = TRUE;
		IF( ( !isMcMasa && LT_32( ivas_total_brate, IVAS_48k ) ) \|\| ( isMcMasa && LT_32( ivas_total_brate, IVAS_16k4 ) ) )
		{
		config->useCoherence = FALSE;
		}

		return;
		}
		#endif


		/*---------------------------------------------------------------
		* masa_sample_rate_band_correction()

lib_com/ivas_prot_fx.h

+22 −0

Original line number	Diff line number	Diff line
		@@ -79,6 +79,28 @@ void ivas_masa_set_elements_fx(
		const Word32 ism_total_brate /* i : initial ISM total bitrate */
		);

		void ivas_masa_set_coding_config_fx(
		MASA_CODEC_CONFIG config, / i/o: MASA coding config structure */
		Word16 band_mapping, / o : Band mapping used */
		const Word32 ivas_total_brate, /* i : IVAS total bitrate */
		const Word16 nchan_transport, /* i : number of transport channels (mono/stereo) */
		const UWord8 isMcMasa /* i : toggle for selecting mcMASA specific config */
		);

		void ivas_masa_prerender_fx(
		Decoder_Struct st_ivas, / i/o: IVAS decoder handle */
		Word32 output_fx[], / i/o: synthesized core-coder transport channels */
		Word16 q_shift, / o : specifies how much the Q-factor of output has changed by. */
		const Word16 output_frame, /* i : output frame length per channel */
		const Word16 nchan_remapped /* i : number of transports used in core */
		);

		ivas_error ivas_masa_dec_reconfigure_fx(
		Decoder_Struct st_ivas, / i/o: IVAS decoder structure */
		UWord16 nSamplesRendered, / o : number of samples flushed from the previous frame (JBM) */
		Word16 data / o : output synthesis signal */
		);

		Word16 ivas_jbm_dec_get_num_tc_channels_fx(
		Decoder_Struct st_ivas / i : IVAS decoder handle */
		);

lib_dec/ivas_init_dec.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -181,7 +181,11 @@ ivas_error ivas_dec_setup(
		ELSE
		{

		#ifdef IVAS_FLOAT_FIXED
		IF ( ( error = ivas_masa_dec_reconfigure_fx( st_ivas, nSamplesRendered, data ) ) != IVAS_ERR_OK )
		#else
		IF ( ( error = ivas_masa_dec_reconfigure( st_ivas, nSamplesRendered, data ) ) != IVAS_ERR_OK )
		#endif
		{
		return error;
		}

lib_dec/ivas_jbm_dec.c

+21 −0

Original line number	Diff line number	Diff line
		@@ -495,7 +495,28 @@ ivas_error ivas_jbm_dec_tc(

		if ( st_ivas->ivas_format == MASA_FORMAT )
		{
		#ifdef IVAS_FLOAT_FIXED
		Word16 q_shift = 0;
		FOR(Word16 i = 0; i < 2; i++)
		{
		output_fx[i] = (Word32 )malloc(output_frame sizeof(Word32));
		FOR(Word16 j = 0; j < output_frame; j++)
		{
		output_fx[i][j] = float_to_fix(p_output[i][j], Q11);
		}
		}
		ivas_masa_prerender_fx( st_ivas, output_fx, &q_shift, output_frame, nchan_remapped );
		FOR(Word16 i = 0; i < 2; i++)
		{
		FOR(Word16 j = 0; j < output_frame; j++)
		{
		p_output[i][j] = fix_to_float(output_fx[i][j], Q11 + q_shift);
		}
		free(output_fx[i]);
		}
		#else
		ivas_masa_prerender( st_ivas, p_output, output_frame, nchan_remapped );
		#endif
		}
		else if ( st_ivas->ivas_format == SBA_FORMAT && ( st_ivas->renderer_type == RENDERER_BINAURAL_PARAMETRIC \|\| st_ivas->renderer_type == RENDERER_BINAURAL_PARAMETRIC_ROOM ) )
		{

lib_dec/ivas_masa_dec.c

+388 −2

File changed.

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