| /*********************************************************************** |
| Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| - Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| names of specific contributors, may be used to endorse or promote |
| products derived from this software without specific prior written |
| permission. |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
| ***********************************************************************/ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "main_FIX.h" |
| #include "stack_alloc.h" |
| #include "tuning_parameters.h" |
| |
| #if defined(MIPSr1_ASM) |
| #include "mips/prefilter_FIX_mipsr1.h" |
| #endif |
| |
| |
| #if !defined(OVERRIDE_silk_warped_LPC_analysis_filter_FIX) |
| #define silk_warped_LPC_analysis_filter_FIX(state, res_Q2, coef_Q13, input, lambda_Q16, length, order, arch) \ |
| ((void)(arch),silk_warped_LPC_analysis_filter_FIX_c(state, res_Q2, coef_Q13, input, lambda_Q16, length, order)) |
| #endif |
| |
| /* Prefilter for finding Quantizer input signal */ |
| static OPUS_INLINE void silk_prefilt_FIX( |
| silk_prefilter_state_FIX *P, /* I/O state */ |
| opus_int32 st_res_Q12[], /* I short term residual signal */ |
| opus_int32 xw_Q3[], /* O prefiltered signal */ |
| opus_int32 HarmShapeFIRPacked_Q12, /* I Harmonic shaping coeficients */ |
| opus_int Tilt_Q14, /* I Tilt shaping coeficient */ |
| opus_int32 LF_shp_Q14, /* I Low-frequancy shaping coeficients */ |
| opus_int lag, /* I Lag for harmonic shaping */ |
| opus_int length /* I Length of signals */ |
| ); |
| |
| void silk_warped_LPC_analysis_filter_FIX_c( |
| opus_int32 state[], /* I/O State [order + 1] */ |
| opus_int32 res_Q2[], /* O Residual signal [length] */ |
| const opus_int16 coef_Q13[], /* I Coefficients [order] */ |
| const opus_int16 input[], /* I Input signal [length] */ |
| const opus_int16 lambda_Q16, /* I Warping factor */ |
| const opus_int length, /* I Length of input signal */ |
| const opus_int order /* I Filter order (even) */ |
| ) |
| { |
| opus_int n, i; |
| opus_int32 acc_Q11, tmp1, tmp2; |
| |
| /* Order must be even */ |
| silk_assert( ( order & 1 ) == 0 ); |
| |
| for( n = 0; n < length; n++ ) { |
| /* Output of lowpass section */ |
| tmp2 = silk_SMLAWB( state[ 0 ], state[ 1 ], lambda_Q16 ); |
| state[ 0 ] = silk_LSHIFT( input[ n ], 14 ); |
| /* Output of allpass section */ |
| tmp1 = silk_SMLAWB( state[ 1 ], state[ 2 ] - tmp2, lambda_Q16 ); |
| state[ 1 ] = tmp2; |
| acc_Q11 = silk_RSHIFT( order, 1 ); |
| acc_Q11 = silk_SMLAWB( acc_Q11, tmp2, coef_Q13[ 0 ] ); |
| /* Loop over allpass sections */ |
| for( i = 2; i < order; i += 2 ) { |
| /* Output of allpass section */ |
| tmp2 = silk_SMLAWB( state[ i ], state[ i + 1 ] - tmp1, lambda_Q16 ); |
| state[ i ] = tmp1; |
| acc_Q11 = silk_SMLAWB( acc_Q11, tmp1, coef_Q13[ i - 1 ] ); |
| /* Output of allpass section */ |
| tmp1 = silk_SMLAWB( state[ i + 1 ], state[ i + 2 ] - tmp2, lambda_Q16 ); |
| state[ i + 1 ] = tmp2; |
| acc_Q11 = silk_SMLAWB( acc_Q11, tmp2, coef_Q13[ i ] ); |
| } |
| state[ order ] = tmp1; |
| acc_Q11 = silk_SMLAWB( acc_Q11, tmp1, coef_Q13[ order - 1 ] ); |
| res_Q2[ n ] = silk_LSHIFT( (opus_int32)input[ n ], 2 ) - silk_RSHIFT_ROUND( acc_Q11, 9 ); |
| } |
| } |
| |
| void silk_prefilter_FIX( |
| silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ |
| const silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */ |
| opus_int32 xw_Q3[], /* O Weighted signal */ |
| const opus_int16 x[] /* I Speech signal */ |
| ) |
| { |
| silk_prefilter_state_FIX *P = &psEnc->sPrefilt; |
| opus_int j, k, lag; |
| opus_int32 tmp_32; |
| const opus_int16 *AR1_shp_Q13; |
| const opus_int16 *px; |
| opus_int32 *pxw_Q3; |
| opus_int HarmShapeGain_Q12, Tilt_Q14; |
| opus_int32 HarmShapeFIRPacked_Q12, LF_shp_Q14; |
| VARDECL( opus_int32, x_filt_Q12 ); |
| VARDECL( opus_int32, st_res_Q2 ); |
| opus_int16 B_Q10[ 2 ]; |
| SAVE_STACK; |
| |
| /* Set up pointers */ |
| px = x; |
| pxw_Q3 = xw_Q3; |
| lag = P->lagPrev; |
| ALLOC( x_filt_Q12, psEnc->sCmn.subfr_length, opus_int32 ); |
| ALLOC( st_res_Q2, psEnc->sCmn.subfr_length, opus_int32 ); |
| for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { |
| /* Update Variables that change per sub frame */ |
| if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { |
| lag = psEncCtrl->pitchL[ k ]; |
| } |
| |
| /* Noise shape parameters */ |
| HarmShapeGain_Q12 = silk_SMULWB( (opus_int32)psEncCtrl->HarmShapeGain_Q14[ k ], 16384 - psEncCtrl->HarmBoost_Q14[ k ] ); |
| silk_assert( HarmShapeGain_Q12 >= 0 ); |
| HarmShapeFIRPacked_Q12 = silk_RSHIFT( HarmShapeGain_Q12, 2 ); |
| HarmShapeFIRPacked_Q12 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShapeGain_Q12, 1 ), 16 ); |
| Tilt_Q14 = psEncCtrl->Tilt_Q14[ k ]; |
| LF_shp_Q14 = psEncCtrl->LF_shp_Q14[ k ]; |
| AR1_shp_Q13 = &psEncCtrl->AR1_Q13[ k * MAX_SHAPE_LPC_ORDER ]; |
| |
| /* Short term FIR filtering*/ |
| silk_warped_LPC_analysis_filter_FIX( P->sAR_shp, st_res_Q2, AR1_shp_Q13, px, |
| psEnc->sCmn.warping_Q16, psEnc->sCmn.subfr_length, psEnc->sCmn.shapingLPCOrder, psEnc->sCmn.arch ); |
| |
| /* Reduce (mainly) low frequencies during harmonic emphasis */ |
| B_Q10[ 0 ] = silk_RSHIFT_ROUND( psEncCtrl->GainsPre_Q14[ k ], 4 ); |
| tmp_32 = silk_SMLABB( SILK_FIX_CONST( INPUT_TILT, 26 ), psEncCtrl->HarmBoost_Q14[ k ], HarmShapeGain_Q12 ); /* Q26 */ |
| tmp_32 = silk_SMLABB( tmp_32, psEncCtrl->coding_quality_Q14, SILK_FIX_CONST( HIGH_RATE_INPUT_TILT, 12 ) ); /* Q26 */ |
| tmp_32 = silk_SMULWB( tmp_32, -psEncCtrl->GainsPre_Q14[ k ] ); /* Q24 */ |
| tmp_32 = silk_RSHIFT_ROUND( tmp_32, 14 ); /* Q10 */ |
| B_Q10[ 1 ]= silk_SAT16( tmp_32 ); |
| x_filt_Q12[ 0 ] = silk_MLA( silk_MUL( st_res_Q2[ 0 ], B_Q10[ 0 ] ), P->sHarmHP_Q2, B_Q10[ 1 ] ); |
| for( j = 1; j < psEnc->sCmn.subfr_length; j++ ) { |
| x_filt_Q12[ j ] = silk_MLA( silk_MUL( st_res_Q2[ j ], B_Q10[ 0 ] ), st_res_Q2[ j - 1 ], B_Q10[ 1 ] ); |
| } |
| P->sHarmHP_Q2 = st_res_Q2[ psEnc->sCmn.subfr_length - 1 ]; |
| |
| silk_prefilt_FIX( P, x_filt_Q12, pxw_Q3, HarmShapeFIRPacked_Q12, Tilt_Q14, LF_shp_Q14, lag, psEnc->sCmn.subfr_length ); |
| |
| px += psEnc->sCmn.subfr_length; |
| pxw_Q3 += psEnc->sCmn.subfr_length; |
| } |
| |
| P->lagPrev = psEncCtrl->pitchL[ psEnc->sCmn.nb_subfr - 1 ]; |
| RESTORE_STACK; |
| } |
| |
| #ifndef OVERRIDE_silk_prefilt_FIX |
| /* Prefilter for finding Quantizer input signal */ |
| static OPUS_INLINE void silk_prefilt_FIX( |
| silk_prefilter_state_FIX *P, /* I/O state */ |
| opus_int32 st_res_Q12[], /* I short term residual signal */ |
| opus_int32 xw_Q3[], /* O prefiltered signal */ |
| opus_int32 HarmShapeFIRPacked_Q12, /* I Harmonic shaping coeficients */ |
| opus_int Tilt_Q14, /* I Tilt shaping coeficient */ |
| opus_int32 LF_shp_Q14, /* I Low-frequancy shaping coeficients */ |
| opus_int lag, /* I Lag for harmonic shaping */ |
| opus_int length /* I Length of signals */ |
| ) |
| { |
| opus_int i, idx, LTP_shp_buf_idx; |
| opus_int32 n_LTP_Q12, n_Tilt_Q10, n_LF_Q10; |
| opus_int32 sLF_MA_shp_Q12, sLF_AR_shp_Q12; |
| opus_int16 *LTP_shp_buf; |
| |
| /* To speed up use temp variables instead of using the struct */ |
| LTP_shp_buf = P->sLTP_shp; |
| LTP_shp_buf_idx = P->sLTP_shp_buf_idx; |
| sLF_AR_shp_Q12 = P->sLF_AR_shp_Q12; |
| sLF_MA_shp_Q12 = P->sLF_MA_shp_Q12; |
| |
| for( i = 0; i < length; i++ ) { |
| if( lag > 0 ) { |
| /* unrolled loop */ |
| silk_assert( HARM_SHAPE_FIR_TAPS == 3 ); |
| idx = lag + LTP_shp_buf_idx; |
| n_LTP_Q12 = silk_SMULBB( LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 - 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 ); |
| n_LTP_Q12 = silk_SMLABT( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 ) & LTP_MASK ], HarmShapeFIRPacked_Q12 ); |
| n_LTP_Q12 = silk_SMLABB( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 + 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 ); |
| } else { |
| n_LTP_Q12 = 0; |
| } |
| |
| n_Tilt_Q10 = silk_SMULWB( sLF_AR_shp_Q12, Tilt_Q14 ); |
| n_LF_Q10 = silk_SMLAWB( silk_SMULWT( sLF_AR_shp_Q12, LF_shp_Q14 ), sLF_MA_shp_Q12, LF_shp_Q14 ); |
| |
| sLF_AR_shp_Q12 = silk_SUB32( st_res_Q12[ i ], silk_LSHIFT( n_Tilt_Q10, 2 ) ); |
| sLF_MA_shp_Q12 = silk_SUB32( sLF_AR_shp_Q12, silk_LSHIFT( n_LF_Q10, 2 ) ); |
| |
| LTP_shp_buf_idx = ( LTP_shp_buf_idx - 1 ) & LTP_MASK; |
| LTP_shp_buf[ LTP_shp_buf_idx ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( sLF_MA_shp_Q12, 12 ) ); |
| |
| xw_Q3[i] = silk_RSHIFT_ROUND( silk_SUB32( sLF_MA_shp_Q12, n_LTP_Q12 ), 9 ); |
| } |
| |
| /* Copy temp variable back to state */ |
| P->sLF_AR_shp_Q12 = sLF_AR_shp_Q12; |
| P->sLF_MA_shp_Q12 = sLF_MA_shp_Q12; |
| P->sLTP_shp_buf_idx = LTP_shp_buf_idx; |
| } |
| #endif /* OVERRIDE_silk_prefilt_FIX */ |
