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comparison: media/libopus/silk/fixed/process_gains_FIX.c
media/libopus/silk/fixed/process_gains_FIX.c
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:43967e0f615e |
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| 1 /*********************************************************************** | |
| 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. | |
| 3 Redistribution and use in source and binary forms, with or without | |
| 4 modification, are permitted provided that the following conditions | |
| 5 are met: | |
| 6 - Redistributions of source code must retain the above copyright notice, | |
| 7 this list of conditions and the following disclaimer. | |
| 8 - Redistributions in binary form must reproduce the above copyright | |
| 9 notice, this list of conditions and the following disclaimer in the | |
| 10 documentation and/or other materials provided with the distribution. | |
| 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the | |
| 12 names of specific contributors, may be used to endorse or promote | |
| 13 products derived from this software without specific prior written | |
| 14 permission. | |
| 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
| 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 25 POSSIBILITY OF SUCH DAMAGE. | |
| 26 ***********************************************************************/ | |
| 27 | |
| 28 #ifdef HAVE_CONFIG_H | |
| 29 #include "config.h" | |
| 30 #endif | |
| 31 | |
| 32 #include "main_FIX.h" | |
| 33 #include "tuning_parameters.h" | |
| 34 | |
| 35 /* Processing of gains */ | |
| 36 void silk_process_gains_FIX( | |
| 37 silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ | |
| 38 silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */ | |
| 39 opus_int condCoding /* I The type of conditional coding to use */ | |
| 40 ) | |
| 41 { | |
| 42 silk_shape_state_FIX *psShapeSt = &psEnc->sShape; | |
| 43 opus_int k; | |
| 44 opus_int32 s_Q16, InvMaxSqrVal_Q16, gain, gain_squared, ResNrg, ResNrgPart, quant_offset_Q10; | |
| 45 | |
| 46 /* Gain reduction when LTP coding gain is high */ | |
| 47 if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | |
| 48 /*s = -0.5f * silk_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) ); */ | |
| 49 s_Q16 = -silk_sigm_Q15( silk_RSHIFT_ROUND( psEncCtrl->LTPredCodGain_Q7 - SILK_FIX_CONST( 12.0, 7 ), 4 ) ); | |
| 50 for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | |
| 51 psEncCtrl->Gains_Q16[ k ] = silk_SMLAWB( psEncCtrl->Gains_Q16[ k ], psEncCtrl->Gains_Q16[ k ], s_Q16 ); | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 /* Limit the quantized signal */ | |
| 56 /* InvMaxSqrVal = pow( 2.0f, 0.33f * ( 21.0f - SNR_dB ) ) / subfr_length; */ | |
| 57 InvMaxSqrVal_Q16 = silk_DIV32_16( silk_log2lin( | |
| 58 silk_SMULWB( SILK_FIX_CONST( 21 + 16 / 0.33, 7 ) - psEnc->sCmn.SNR_dB_Q7, SILK_FIX_CONST( 0.33, 16 ) ) ), psEnc->sCmn.subfr_length ); | |
| 59 | |
| 60 for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | |
| 61 /* Soft limit on ratio residual energy and squared gains */ | |
| 62 ResNrg = psEncCtrl->ResNrg[ k ]; | |
| 63 ResNrgPart = silk_SMULWW( ResNrg, InvMaxSqrVal_Q16 ); | |
| 64 if( psEncCtrl->ResNrgQ[ k ] > 0 ) { | |
| 65 ResNrgPart = silk_RSHIFT_ROUND( ResNrgPart, psEncCtrl->ResNrgQ[ k ] ); | |
| 66 } else { | |
| 67 if( ResNrgPart >= silk_RSHIFT( silk_int32_MAX, -psEncCtrl->ResNrgQ[ k ] ) ) { | |
| 68 ResNrgPart = silk_int32_MAX; | |
| 69 } else { | |
| 70 ResNrgPart = silk_LSHIFT( ResNrgPart, -psEncCtrl->ResNrgQ[ k ] ); | |
| 71 } | |
| 72 } | |
| 73 gain = psEncCtrl->Gains_Q16[ k ]; | |
| 74 gain_squared = silk_ADD_SAT32( ResNrgPart, silk_SMMUL( gain, gain ) ); | |
| 75 if( gain_squared < silk_int16_MAX ) { | |
| 76 /* recalculate with higher precision */ | |
| 77 gain_squared = silk_SMLAWW( silk_LSHIFT( ResNrgPart, 16 ), gain, gain ); | |
| 78 silk_assert( gain_squared > 0 ); | |
| 79 gain = silk_SQRT_APPROX( gain_squared ); /* Q8 */ | |
| 80 gain = silk_min( gain, silk_int32_MAX >> 8 ); | |
| 81 psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 8 ); /* Q16 */ | |
| 82 } else { | |
| 83 gain = silk_SQRT_APPROX( gain_squared ); /* Q0 */ | |
| 84 gain = silk_min( gain, silk_int32_MAX >> 16 ); | |
| 85 psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 16 ); /* Q16 */ | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 /* Save unquantized gains and gain Index */ | |
| 90 silk_memcpy( psEncCtrl->GainsUnq_Q16, psEncCtrl->Gains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) ); | |
| 91 psEncCtrl->lastGainIndexPrev = psShapeSt->LastGainIndex; | |
| 92 | |
| 93 /* Quantize gains */ | |
| 94 silk_gains_quant( psEnc->sCmn.indices.GainsIndices, psEncCtrl->Gains_Q16, | |
| 95 &psShapeSt->LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr ); | |
| 96 | |
| 97 /* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */ | |
| 98 if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | |
| 99 if( psEncCtrl->LTPredCodGain_Q7 + silk_RSHIFT( psEnc->sCmn.input_tilt_Q15, 8 ) > SILK_FIX_CONST( 1.0, 7 ) ) { | |
| 100 psEnc->sCmn.indices.quantOffsetType = 0; | |
| 101 } else { | |
| 102 psEnc->sCmn.indices.quantOffsetType = 1; | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 /* Quantizer boundary adjustment */ | |
| 107 quant_offset_Q10 = silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ]; | |
| 108 psEncCtrl->Lambda_Q10 = SILK_FIX_CONST( LAMBDA_OFFSET, 10 ) | |
| 109 + silk_SMULBB( SILK_FIX_CONST( LAMBDA_DELAYED_DECISIONS, 10 ), psEnc->sCmn.nStatesDelayedDecision ) | |
| 110 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_SPEECH_ACT, 18 ), psEnc->sCmn.speech_activity_Q8 ) | |
| 111 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_INPUT_QUALITY, 12 ), psEncCtrl->input_quality_Q14 ) | |
| 112 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_CODING_QUALITY, 12 ), psEncCtrl->coding_quality_Q14 ) | |
| 113 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_QUANT_OFFSET, 16 ), quant_offset_Q10 ); | |
| 114 | |
| 115 silk_assert( psEncCtrl->Lambda_Q10 > 0 ); | |
| 116 silk_assert( psEncCtrl->Lambda_Q10 < SILK_FIX_CONST( 2, 10 ) ); | |
| 117 } |
