Integrate limiter process function (9860ae76) · Commits · SA4 / Audio / IVAS BASOP

lib_dec/ivas_jbm_dec.c

+252 −191

Original line number	Diff line number	Diff line
		@@ -69,12 +69,13 @@ static void ivas_jbm_masa_sf_to_slot_map( Decoder_Struct *st_ivas, const int16_t
		#endif



		#ifdef IVAS_FLOAT_FIXED
		static Word16 ceil_fx16( Word16 inp, Word16 Q );
		static Word16 ceil_fx16( Word16 inp, Word16 Q ) {
		static Word16 ceil_fx16( Word16 inp, Word16 Q )
		{
		Word16 ret = shr( inp, Q );
		IF( inp & ( ( 1 << Q ) - 1) > 0) {
		IF( inp & ( ( 1 << Q ) - 1 ) > 0 )
		{
		ret = ret + 1;
		}
		return ret;
		@@ -3406,7 +3407,37 @@ ivas_error ivas_jbm_dec_render(
		if ( st_ivas->ivas_format != MONO_FORMAT )
		{
		#ifndef DISABLE_LIMITER
		#ifdef IVAS_FLOAT_FIXED
		Word16 ch_idx;
		exp = 16;
		for ( ch_idx = 0; ch_idx < MAX_CICP_CHANNELS; ch_idx++ )
		{

		p_output_fx[ch_idx] = tmp_buffer_fx[ch_idx];
		}
		for ( ch_idx = 0; ch_idx < nchan_out; ch_idx++ )
		{
		exp = s_min( exp , Q_factor_arrL( p_output[ch_idx], *nSamplesRendered ) );
		}
		exp -= 2;
		for ( ch_idx = 0; ch_idx < nchan_out; ch_idx++ )
		{
		for ( j = 0; j < *nSamplesRendered; j++ )
		{
		p_output_fx[ch_idx][j] = (Word32) ( p_output[ch_idx][j] * ( 1 << exp ) );
		}
		}
		ivas_limiter_dec_fx( st_ivas->hLimiter, p_output_fx, nchan_out, *nSamplesRendered, st_ivas->BER_detect, exp );
		for ( ch_idx = 0; ch_idx < st_ivas->hDecoderConfig->nchan_out; ch_idx++ )
		{
		for ( j = 0; j < *nSamplesRendered; j++ )
		{
		p_output[ch_idx][j] = ( (float) p_output_fx[ch_idx][j] / ( 1 << exp ) );
		}
		}
		#else
		ivas_limiter_dec( st_ivas->hLimiter, p_output, nchan_out, *nSamplesRendered, st_ivas->BER_detect );
		#endif
		#endif
		}
		}
		@@ -3804,7 +3835,39 @@ ivas_error ivas_jbm_dec_flush_renderer(
		if ( st_ivas->ivas_format != MONO_FORMAT )
		{
		#ifndef DISABLE_LIMITER
		#ifdef IVAS_FLOAT_FIXED
		Word16 ch_idx;
		exp = 16;
		for ( ch_idx = 0; ch_idx < MAX_CICP_CHANNELS; ch_idx++ )
		{

		p_output_fx[ch_idx] = output_fx[ch_idx];
		}
		for ( ch_idx = 0; ch_idx < st_ivas->hDecoderConfig->nchan_out; ch_idx++ )
		{
		exp = s_min( exp, Q_factor_arrL( p_output[ch_idx], *nSamplesRendered ) );
		}
		exp -= 1;
		for ( ch_idx = 0; ch_idx < st_ivas->hDecoderConfig->nchan_out; ch_idx++ )
		{
		for ( j = 0; j < *nSamplesRendered; j++ )
		{
		p_output_fx[ch_idx][j] = (Word32) ( p_output[ch_idx][j] *(1<< exp) ) ;
		}
		}
		ivas_limiter_dec_fx( st_ivas->hLimiter, p_output_fx, st_ivas->hDecoderConfig->nchan_out, *nSamplesRendered, st_ivas->BER_detect, exp );
		for ( ch_idx = 0; ch_idx < st_ivas->hDecoderConfig->nchan_out; ch_idx++ )
		{
		for ( j = 0; j < *nSamplesRendered; j++ )
		{
		p_output[ch_idx][j] = ( (float) p_output_fx[ch_idx][j] / ( 1 << exp ) );
		}
		}
		#else

		ivas_limiter_dec( st_ivas->hLimiter, p_output, st_ivas->hDecoderConfig->nchan_out, *nSamplesRendered, st_ivas->BER_detect );

		#endif
		#endif
		}
		}
		@@ -5825,7 +5888,6 @@ ivas_error ivas_jbm_dec_metadata_open(
		#endif



		/--------------------------------------------------------------------------
		* ivas_jbm_dec_copy_masa_meta_to_buffer()
		*
		@@ -5908,7 +5970,6 @@ static void ivas_jbm_dec_copy_masa_meta_to_buffer(
		#endif



		/--------------------------------------------------------------------------
		* ivas_jbm_masa_sf_to_slot_map()
		*

lib_rend/ivas_limiter.c

+48 −7

Original line number	Diff line number	Diff line
		@@ -160,21 +160,21 @@ static Word16 detect_strong_saturations_fx(
		)
		{
		Word16 apply_strong_limiting;
		Word32 compare_max_value_Mul_3, compare_max_value_Mul_10;
		Word64 compare_max_value_Mul_3, compare_max_value_Mul_10;

		apply_strong_limiting = 0;
		compare_max_value_Mul_3 = L_lshl(98187,q_factor); // 3 * IVAS_LIMITER_THRESHOLD
		compare_max_value_Mul_10 = L_lshl( 327290, q_factor );//10 * IVAS_LIMITER_THRESHOLD
		compare_max_value_Mul_3 = W_shl(98187,q_factor); // 3 * IVAS_LIMITER_THRESHOLD
		compare_max_value_Mul_10 = W_shl( 327290, q_factor );//10 * IVAS_LIMITER_THRESHOLD
		IF ( BER_detect )
		{
		*strong_saturation_cnt = 50;
		apply_strong_limiting = 1;
		}
		ELSE IF( GT_32( max_val , compare_max_value_Mul_3) && GT_16(*strong_saturation_cnt , 0 ))
		ELSE IF( GT_64( max_val, compare_max_value_Mul_3 ) && GT_16( *strong_saturation_cnt, 0 ) )
		{
		apply_strong_limiting = 1;
		}
		ELSE IF( GT_32 (max_val , compare_max_value_Mul_10) )
		ELSE IF( GT_64( max_val, compare_max_value_Mul_10 ) )
		{
		*strong_saturation_cnt += 20;
		strong_saturation_cnt = min( strong_saturation_cnt, 50 );
		@@ -371,6 +371,47 @@ void ivas_limiter_close(
		return;
		}
		#endif
		#ifdef IVAS_FLOAT_FIXED
		/-------------------------------------------------------------------
		* ivas_limiter_dec()
		*
		* In-place saturation control for multichannel buffers with adaptive
		* release time and special handling of bit errors
		-------------------------------------------------------------------/

		void ivas_limiter_dec_fx(
		IVAS_LIMITER_HANDLE hLimiter, /* i/o: limiter struct handle */
		Word32 output[MAX_OUTPUT_CHANNELS], / i/o: input/output buffer */
		const Word16 num_channels, /* i : number of channels to be processed */
		const Word16 output_frame, /* i : number of samples per channel in the buffer */
		const Word16 BER_detect, /* i : BER detect flag */
		Word16 q_factor
		)
		{
		Word16 c;
		Word32 **channels;

		/* return early if given bad parameters */
		IF ( hLimiter == NULL \|\| output == NULL \|\| output_frame <= 0 )
		{
		return;
		}

		/* Update number of channels and prepare pointers to the beginning of each of them */
		assert( num_channels <= hLimiter->max_num_channels && "Number of channels must be lower than the maximum set during limiter initialization!" );
		hLimiter->num_channels = min( num_channels, hLimiter->max_num_channels );
		channels = hLimiter->channel_ptrs_fx;

		FOR ( c = 0; c < num_channels; ++c )
		{
		channels[c] = output[c];
		}
		Word32 limiter_thresold = L_shl( IVAS_LIMITER_THRESHOLD, q_factor );
		limiter_process_fx( hLimiter, output_frame, limiter_thresold, BER_detect, &hLimiter->strong_saturation_count, q_factor );

		return;
		}
		#endif

		/-------------------------------------------------------------------
		* ivas_limiter_dec()
		@@ -410,7 +451,6 @@ void ivas_limiter_dec(

		return;
		}

		#ifdef IVAS_FLOAT_FIXED
		/-------------------------------------------------------------------
		* limiter_process()
		@@ -500,6 +540,7 @@ void limiter_process_fx(
		}
		releaseHeuristic = hLimiter->release_heuristic_fx;
		q_fact_gain = Q30;

		IF (GT_32( max_val , threshold) )
		{
		frame_gain = L_shl(divide3232( threshold, max_val ),15);//to q30

lib_rend/ivas_prot_rend.h

+11 −1

Original line number	Diff line number	Diff line
		@@ -119,7 +119,17 @@ void ivas_limiter_dec
		const int16_t output_frame, /* i : number of samples per channel in the buffer */
		const int16_t BER_detect /* i : BER detect flag */
		);

		#ifdef IVAS_FLOAT_FIXED
		void ivas_limiter_dec_fx
		(
		IVAS_LIMITER_HANDLE hLimiter, /* i/o: limiter struct handle */
		Word32 output[MAX_OUTPUT_CHANNELS], / i/o: input/output buffer */
		const Word16 num_channels, /* i : number of channels to be processed */
		const Word16 output_frame, /* i : number of samples per channel in the buffer */
		const Word16 BER_detect, /* i : BER detect flag */
		Word16 q_factor
		);
		#endif
		void limiter_process(
		IVAS_LIMITER_HANDLE hLimiter, /* i/o: limiter struct handle */
		const int16_t output_frame, /* i : number of samples to be processed per channel in the I/O buffer */

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