Merge branch 'dlb/cont-47-low-bitrate-SBA-update2' into 'main' (69755e01) · Commits · IVAS Codec Public Collaboration / IVAS Codec

lib_com/bitstream.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1801,7 +1801,11 @@ ivas_error preview_indices(
		if ( bit_stream[2] == 0 )
		{
		st_ivas->ivas_format = SBA_FORMAT;
		#ifndef LBR_SBA
		st_ivas->sba_mode = ivas_sba_mode_select( total_brate );
		#else
		st_ivas->sba_mode = ivas_sba_mode_select();
		#endif
		}
		else
		{

lib_com/ivas_cnst.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -986,6 +986,9 @@ typedef enum
		/* Common SPAR metadata constants */
		#define IVAS_ACTIVEW_DM_F_SCALE 0.5f
		#define IVAS_ACTIVEW_DM_F_SCALE_DTX 0.25f
		#ifdef LBR_SBA
		#define IVAS_ACTIVEW_DM_F_SCALE_VLBR 0.25f
		#endif
		#define IVAS_SPAR_FOA_DFLT_FREQ_PER_CHAN 24000

		#define MAX_QUANT_STRATS 3
		@@ -1018,7 +1021,11 @@ typedef enum
		DECX_COEFF
		} ivas_coeffs_type_t;

		#ifdef LBR_SBA
		#define IVAS_SPAR_BR_TABLE_LEN 20
		#else
		#define IVAS_SPAR_BR_TABLE_LEN 18
		#endif

		/* TD decorr */ // VE: not all 16CH are currently supported -> t be revisited later
		enum

lib_com/ivas_cov_smooth.c

+54 −3

Original line number	Diff line number	Diff line
		@@ -52,10 +52,54 @@ static void ivas_set_up_cov_smoothing(
		const float max_update_rate,
		const int16_t min_pool_size,
		const int16_t nchan_inp /* i : number of input channels */
		#ifdef LBR_SBA_EXTRA_COV_SMOOTH
		,
		const int32_t ivas_total_brate
		#endif
		)
		{
		int16_t j, k;
		#ifdef LBR_SBA_DM_COV_FIX
		if ( ivas_total_brate < IVAS_24k4 )
		{
		for ( j = 0; j < pFb->filterbank_num_bands; j++ )
		{
		float update_factor;
		float *p_bin_to_band;
		update_factor = 0.0f;
		p_bin_to_band = pFb->fb_bin_to_band.pp_short_stride_bin_to_band[j];
		int16_t active_bins;
		active_bins = pFb->fb_bin_to_band.p_short_stride_num_bins_per_band[j];

		for ( k = 0; k < active_bins; k++ )
		{
		update_factor += p_bin_to_band[k];
		}

		hCovState->pSmoothing_factor[j] = update_factor / min_pool_size;
		#ifdef LBR_SBA_EXTRA_COV_SMOOTH
		float smooth_fact;
		if ( ivas_total_brate < IVAS_24k4 )
		{
		smooth_fact = 0.5f;
		}
		else
		{
		smooth_fact = 0.75;
		}
		hCovState->pSmoothing_factor[j] = ( j + 1 ) smooth_fact;
		#else
		hCovState->pSmoothing_factor[j] = ( j + 1 ) 0.75f;
		#endif

		if ( hCovState->pSmoothing_factor[j] > max_update_rate )
		{
		hCovState->pSmoothing_factor[j] = max_update_rate;
		}
		}
		}
		else
		#endif
		if ( nchan_inp <= FOA_CHANNELS )
		{
		for ( j = 0; j < pFb->filterbank_num_bands; j++ )
		@@ -115,6 +159,10 @@ ivas_error ivas_spar_covar_smooth_enc_open(
		const ivas_cov_smooth_cfg_t cov_smooth_cfg, / i : SPAR config. handle */
		ivas_filterbank_t pFb, / i/o: FB handle */
		const int16_t nchan_inp /* i : number of input channels */
		#ifdef LBR_SBA_EXTRA_COV_SMOOTH
		,
		const int32_t ivas_total_brate /* i : IVAS total bitrate */
		#endif
		)
		{
		ivas_cov_smooth_state_t *hCovState;
		@@ -142,8 +190,11 @@ ivas_error ivas_spar_covar_smooth_enc_open(
		}
		}

		ivas_set_up_cov_smoothing( hCovState, pFb, cov_smooth_cfg->max_update_rate, cov_smooth_cfg->min_pool_size,
		nchan_inp );
		#ifdef LBR_SBA_EXTRA_COV_SMOOTH
		ivas_set_up_cov_smoothing( hCovState, pFb, cov_smooth_cfg->max_update_rate, cov_smooth_cfg->min_pool_size, nchan_inp, ivas_total_brate );
		#else
		ivas_set_up_cov_smoothing( hCovState, pFb, cov_smooth_cfg->max_update_rate, cov_smooth_cfg->min_pool_size, nchan_inp );
		#endif

		*hCovState_out = hCovState;

lib_com/ivas_dirac_com.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -259,10 +259,18 @@ void ivas_dirac_config_bands(
		{
		band_grouping[reduced_band] = max_band;
		}
		#ifdef LBR_SBA
		for ( band = enc_param_start_band + ( DIRAC_MAX_NBANDS - enc_param_start_band ) / 2 - 1, reduced_band = DIRAC_MAX_NBANDS - 1; band >= enc_param_start_band; band--, reduced_band -= step )
		{
		dirac_to_spar_md_bands[reduced_band] = dirac_to_spar_md_bands[band];
		dirac_to_spar_md_bands[reduced_band - 1] = dirac_to_spar_md_bands[band];
		}
		#else
		for ( band = enc_param_start_band + 1; band < DIRAC_MAX_NBANDS; band++ )
		{
		dirac_to_spar_md_bands[band] = dirac_to_spar_md_bands[band - 1];
		}
		#endif
		}
		else
		{

lib_com/ivas_prot.h

100755 → 100644

+28 −0

Original line number	Diff line number	Diff line
		@@ -3184,7 +3184,11 @@ void ivas_dirac_param_est_enc(

		/! r: SBA format mode /
		SBA_MODE ivas_sba_mode_select(
		#ifndef LBR_SBA
		const int32_t ivas_total_brate /* i : IVAS total bitrate */
		#else
		void
		#endif
		);

		void ivas_sba_config(
		@@ -4086,6 +4090,10 @@ ivas_error ivas_spar_md_enc_process(
		const int16_t dtx_vad,
		const int16_t nchan_inp,
		const int16_t sba_order /* i : Ambisonic (SBA) order */
		#ifdef LBR_SBA
		,
		float prior_mixer[IVAS_MAX_FB_MIXER_OUT_CH][IVAS_MAX_SPAR_FB_MIXER_IN_CH] / i : prior mixer_matrix */
		#endif
		);

		void ivas_compute_spar_params(
		@@ -4099,6 +4107,9 @@ void ivas_compute_spar_params(
		const int16_t num_ch,
		const int16_t bands_bw,
		const int16_t active_w,
		#ifdef LBR_SBA
		const int16_t active_w_vlbr,
		#endif
		ivas_spar_md_com_cfg *hSparCfg,
		ivas_spar_md_t *hSparMd,
		float *pWscale,
		@@ -4142,6 +4153,11 @@ void ivas_get_spar_md_from_dirac(
		const int16_t order,
		const int16_t dtx_vad,
		float Wscale_d[IVAS_MAX_NUM_BANDS]
		#ifdef LBR_SBA
		,
		const uint8_t useLowerRes,
		const int16_t active_w_vlbr
		#endif
		);

		ivas_error ivas_spar_md_dec_open(
		@@ -4185,6 +4201,10 @@ void ivas_spar_to_dirac(
		ivas_spar_md_dec_state_t hMdDec, / i/o: SPAR MD decoder handle */
		const int16_t dtx_vad, /* i : DTX frame flag */
		const int16_t num_bands_out /* i : number of output bands */
		#ifdef LBR_SBA
		,
		const int16_t bw /* i : band joining factor */
		#endif
		);

		void ivas_spar_update_md_hist(
		@@ -4214,6 +4234,10 @@ ivas_error ivas_spar_covar_enc_open(
		ivas_filterbank_t pFb, / i/o: FB handle */
		const int32_t input_Fs, /* i : input sampling rate */
		const int16_t nchan_inp /* i : number of input channels */
		#ifdef LBR_SBA_EXTRA_COV_SMOOTH
		,
		const int32_t ivas_total_brate /* i : IVAS total bitrate */
		#endif
		);

		void ivas_spar_covar_enc_close(
		@@ -4240,6 +4264,10 @@ ivas_error ivas_spar_covar_smooth_enc_open(
		const ivas_cov_smooth_cfg_t cov_smooth_cfg, / i : SPAR config. handle */
		ivas_filterbank_t pFb, / i/o: FB handle */
		const int16_t nchan_inp /* i : number of input channels */
		#ifdef LBR_SBA_EXTRA_COV_SMOOTH
		,
		const int32_t ivas_total_brate /* i : IVAS total bitrate */
		#endif
		);

		void ivas_spar_covar_smooth_enc_close(

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