diff options
Diffstat (limited to 'libs/libopus/silk/CNG.c')
| -rw-r--r-- | libs/libopus/silk/CNG.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/libs/libopus/silk/CNG.c b/libs/libopus/silk/CNG.c index 8443ad63b..2a910099e 100644 --- a/libs/libopus/silk/CNG.c +++ b/libs/libopus/silk/CNG.c @@ -118,6 +118,10 @@ void silk_CNG( /* Smooth gains */ for( i = 0; i < psDec->nb_subfr; i++ ) { psCNG->CNG_smth_Gain_Q16 += silk_SMULWB( psDecCtrl->Gains_Q16[ i ] - psCNG->CNG_smth_Gain_Q16, CNG_GAIN_SMTH_Q16 ); + /* If the smoothed gain is 3 dB greater than this subframe's gain, use this subframe's gain to adapt faster. */ + if( silk_SMULWW( psCNG->CNG_smth_Gain_Q16, CNG_GAIN_SMTH_THRESHOLD_Q16 ) > psDecCtrl->Gains_Q16[ i ] ) { + psCNG->CNG_smth_Gain_Q16 = psDecCtrl->Gains_Q16[ i ]; + } } } @@ -138,16 +142,16 @@ void silk_CNG( gain_Q16 = silk_LSHIFT32( silk_SQRT_APPROX( gain_Q16 ), 8 ); } gain_Q10 = silk_RSHIFT( gain_Q16, 6 ); - + silk_CNG_exc( CNG_sig_Q14 + MAX_LPC_ORDER, psCNG->CNG_exc_buf_Q14, length, &psCNG->rand_seed ); /* Convert CNG NLSF to filter representation */ - silk_NLSF2A( A_Q12, psCNG->CNG_smth_NLSF_Q15, psDec->LPC_order ); + silk_NLSF2A( A_Q12, psCNG->CNG_smth_NLSF_Q15, psDec->LPC_order, psDec->arch ); /* Generate CNG signal, by synthesis filtering */ silk_memcpy( CNG_sig_Q14, psCNG->CNG_synth_state, MAX_LPC_ORDER * sizeof( opus_int32 ) ); + celt_assert( psDec->LPC_order == 10 || psDec->LPC_order == 16 ); for( i = 0; i < length; i++ ) { - silk_assert( psDec->LPC_order == 10 || psDec->LPC_order == 16 ); /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ LPC_pred_Q10 = silk_RSHIFT( psDec->LPC_order, 1 ); LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, CNG_sig_Q14[ MAX_LPC_ORDER + i - 1 ], A_Q12[ 0 ] ); @@ -170,11 +174,11 @@ void silk_CNG( } /* Update states */ - CNG_sig_Q14[ MAX_LPC_ORDER + i ] = silk_ADD_LSHIFT( CNG_sig_Q14[ MAX_LPC_ORDER + i ], LPC_pred_Q10, 4 ); - + CNG_sig_Q14[ MAX_LPC_ORDER + i ] = silk_ADD_SAT32( CNG_sig_Q14[ MAX_LPC_ORDER + i ], silk_LSHIFT_SAT32( LPC_pred_Q10, 4 ) ); + /* Scale with Gain and add to input signal */ frame[ i ] = (opus_int16)silk_ADD_SAT16( frame[ i ], silk_SAT16( silk_RSHIFT_ROUND( silk_SMULWW( CNG_sig_Q14[ MAX_LPC_ORDER + i ], gain_Q10 ), 8 ) ) ); - + } silk_memcpy( psCNG->CNG_synth_state, &CNG_sig_Q14[ length ], MAX_LPC_ORDER * sizeof( opus_int32 ) ); } else { |