Commit 69755e01 authored by brownstef's avatar brownstef
Browse files

Merge branch 'dlb/cont-47-low-bitrate-SBA-update2' into 'main' 

[non-BE] Merging dlb/cont-47-low-bitrate-SBA-update2 into main

See merge request !588
parents 65ef6ef7 269979ba

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(