Converted ivas_calculate_smoothning_factor function (79f643ec) · Commits · SA4 / Audio / IVAS BASOP

lib_com/ivas_cov_smooth.c

+74 −0

Original line number	Diff line number	Diff line
		@@ -36,6 +36,7 @@
		#include "ivas_prot.h"
		#include "wmc_auto.h"
		#include "prot.h"
		#include "prot_fx2.h"

		/-----------------------------------------------------------------------------------------
		* Local constants
		@@ -65,6 +66,52 @@ static float ivas_calculate_update_factor(
		}


		#ifdef IVAS_FLOAT_FIXED
		/-----------------------------------------------------------------------------------------
		* Function ivas_calculate_smoothning_factor_fx()
		*
		* To calculate the Smoothning factor
		-----------------------------------------------------------------------------------------/

		static void ivas_calculate_smoothning_factor_fx(
		Word32 *Smoothing_factor,
		Word32 update_factor,
		const Word16 min_pool_size,
		const Word32 max_update_rate,
		const COV_SMOOTHING_TYPE smooth_mode,
		const Word32 ivas_total_brate,
		Word16 j )
		{
		Word32 smooth_fact, L_tmp = 0;
		Word16 tmp, exp_diff = 0;

		tmp = BASOP_Util_Divide3232_Scale( update_factor, L_shl( L_deposit_l( min_pool_size ), Q22 ), &exp_diff ); // (Q15 - exp_diff)
		*Smoothing_factor = L_shl_sat( L_deposit_l( tmp ), ( Q15 + exp_diff ) ); // Q30

		IF( NE_32( smooth_mode, COV_SMOOTH_MC ) )
		{
		IF( LT_32( ivas_total_brate, IVAS_24k4 ) )
		{
		smooth_fact = (Word32) ( 0.5f * ONE_IN_Q31 );
		}
		ELSE
		{
		smooth_fact = (Word32) ( 0.75f * ONE_IN_Q31 );
		}

		L_tmp = Mpy_32_16_1( smooth_fact, add( j, 1 ) ); // (Q31 , Q0) -> Q16
		Smoothing_factor = Mpy_32_32( Smoothing_factor, L_tmp ); // (Q30, Q16) -> Q15
		Smoothing_factor = L_shl_sat( Smoothing_factor, Q15 ); // Q30
		}

		IF( *Smoothing_factor > max_update_rate ) // Q30
		{
		*Smoothing_factor = max_update_rate;
		}

		return;
		}
		#else
		/-----------------------------------------------------------------------------------------
		* Function ivas_calculate_smoothning_factor()
		*
		@@ -102,6 +149,7 @@ static void ivas_calculate_smoothning_factor(

		return;
		}
		#endif


		/-----------------------------------------------------------------------------------------
		@@ -120,13 +168,23 @@ static void ivas_set_up_cov_smoothing(
		{
		int16_t j;
		float update_factor;
		#ifdef IVAS_FLOAT_FIXED
		Word32 update_factor_fx, max_update_rate_fx;
		max_update_rate_fx = (Word32) ( max_update_rate * ONE_IN_Q30 );
		#endif
		if ( smooth_mode == COV_SMOOTH_MC )
		{
		for ( j = 0; j < pFb->filterbank_num_bands; j++ )
		{
		int16_t active_bins = pFb->fb_bin_to_band.pFb_active_bins_per_band[j];
		update_factor = ivas_calculate_update_factor( pFb->fb_bin_to_band.pFb_bin_to_band[j], active_bins );
		#ifdef IVAS_FLOAT_FIXED
		update_factor_fx = (Word32) ( update_factor * ONE_IN_Q22 );
		ivas_calculate_smoothning_factor_fx( &hCovState->pSmoothing_factor_fx[j], update_factor_fx, min_pool_size, max_update_rate_fx, smooth_mode, ivas_total_brate, j );
		hCovState->pSmoothing_factor[j] = (float) hCovState->pSmoothing_factor_fx[j] / ONE_IN_Q30;
		#else
		ivas_calculate_smoothning_factor( &hCovState->pSmoothing_factor[j], update_factor, min_pool_size, max_update_rate, smooth_mode, ivas_total_brate, j );
		#endif
		}
		}
		else
		@@ -136,7 +194,13 @@ static void ivas_set_up_cov_smoothing(
		float *p_bin_to_band = pFb->fb_bin_to_band.pp_short_stride_bin_to_band[j];
		int16_t active_bins = pFb->fb_bin_to_band.p_short_stride_num_bins_per_band[j];
		update_factor = ivas_calculate_update_factor( p_bin_to_band, active_bins );
		#ifdef IVAS_FLOAT_FIXED
		update_factor_fx = (Word32) ( update_factor * ONE_IN_Q22 );
		ivas_calculate_smoothning_factor_fx( &hCovState->pSmoothing_factor_fx[j], update_factor_fx, min_pool_size, max_update_rate_fx, smooth_mode, ivas_total_brate, j );
		hCovState->pSmoothing_factor[j] = (float) hCovState->pSmoothing_factor_fx[j] / ONE_IN_Q30;
		#else
		ivas_calculate_smoothning_factor( &hCovState->pSmoothing_factor[j], update_factor, min_pool_size, max_update_rate, smooth_mode, ivas_total_brate, j );
		#endif
		}
		}

		@@ -173,6 +237,12 @@ ivas_error ivas_spar_covar_smooth_enc_open(
		{
		return IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for SPAR COV encoder" );
		}
		#ifdef IVAS_FLOAT_FIXED
		IF( ( hCovState->pSmoothing_factor_fx = (Word32 ) malloc( sizeof( Word32 ) cov_smooth_cfg->max_bands ) ) == NULL )
		{
		return IVAS_ERROR( IVAS_ERR_FAILED_ALLOC, "Can not allocate memory for SPAR COV encoder Fixed" );
		}
		#endif

		for ( i = 0; i < nchan_inp; i++ )
		{
		@@ -214,6 +284,10 @@ void ivas_spar_covar_smooth_enc_close(
		{
		free( hCovState->pSmoothing_factor );
		hCovState->pSmoothing_factor = NULL;
		#ifdef IVAS_FLOAT_FIXED
		free( hCovState->pSmoothing_factor_fx );
		hCovState->pSmoothing_factor_fx = NULL;
		#endif

		for ( i = 0; i < nchan_inp; i++ )
		{

lib_com/ivas_stat_com.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -359,6 +359,9 @@ typedef struct ivas_cov_smooth_state_t
		int16_t prior_bank_idx;
		float *pSmoothing_factor;
		int16_t num_bins;
		#ifdef IVAS_FLOAT_FIXED
		Word32 *pSmoothing_factor_fx;
		#endif

		} ivas_cov_smooth_state_t;