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https://github.com/signalwire/freeswitch.git
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100 lines
5.7 KiB
C
100 lines
5.7 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#include "SKP_Silk_main.h"
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#include "SKP_Silk_tuning_parameters.h"
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SKP_INLINE SKP_int SKP_Silk_setup_complexity(
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SKP_Silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
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SKP_int Complexity /* I Complexity (0->low; 1->medium; 2->high) */
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)
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{
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SKP_int ret = SKP_SILK_NO_ERROR;
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/* Check that settings are valid */
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if( LOW_COMPLEXITY_ONLY && Complexity != 0 ) {
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ret = SKP_SILK_ENC_INVALID_COMPLEXITY_SETTING;
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}
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/* Set encoding complexity */
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if( Complexity == 0 || LOW_COMPLEXITY_ONLY ) {
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/* Low complexity */
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psEncC->Complexity = 0;
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psEncC->pitchEstimationComplexity = PITCH_EST_COMPLEXITY_LC_MODE;
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psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( FIND_PITCH_CORRELATION_THRESHOLD_LC_MODE, 16 );
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psEncC->pitchEstimationLPCOrder = 6;
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psEncC->shapingLPCOrder = 8;
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psEncC->la_shape = 3 * psEncC->fs_kHz;
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psEncC->nStatesDelayedDecision = 1;
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psEncC->useInterpolatedNLSFs = 0;
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psEncC->LTPQuantLowComplexity = 1;
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psEncC->NLSF_MSVQ_Survivors = MAX_NLSF_MSVQ_SURVIVORS_LC_MODE;
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psEncC->warping_Q16 = 0;
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} else if( Complexity == 1 ) {
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/* Medium complexity */
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psEncC->Complexity = 1;
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psEncC->pitchEstimationComplexity = PITCH_EST_COMPLEXITY_MC_MODE;
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psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( FIND_PITCH_CORRELATION_THRESHOLD_MC_MODE, 16 );
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psEncC->pitchEstimationLPCOrder = 12;
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psEncC->shapingLPCOrder = 12;
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psEncC->la_shape = 5 * psEncC->fs_kHz;
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psEncC->nStatesDelayedDecision = 2;
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psEncC->useInterpolatedNLSFs = 0;
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psEncC->LTPQuantLowComplexity = 0;
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psEncC->NLSF_MSVQ_Survivors = MAX_NLSF_MSVQ_SURVIVORS_MC_MODE;
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psEncC->warping_Q16 = psEncC->fs_kHz * SKP_FIX_CONST( WARPING_MULTIPLIER, 16 );
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} else if( Complexity == 2 ) {
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/* High complexity */
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psEncC->Complexity = 2;
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psEncC->pitchEstimationComplexity = PITCH_EST_COMPLEXITY_HC_MODE;
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psEncC->pitchEstimationThreshold_Q16 = SKP_FIX_CONST( FIND_PITCH_CORRELATION_THRESHOLD_HC_MODE, 16 );
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psEncC->pitchEstimationLPCOrder = 16;
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psEncC->shapingLPCOrder = 16;
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psEncC->la_shape = 5 * psEncC->fs_kHz;
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psEncC->nStatesDelayedDecision = MAX_DEL_DEC_STATES;
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psEncC->useInterpolatedNLSFs = 1;
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psEncC->LTPQuantLowComplexity = 0;
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psEncC->NLSF_MSVQ_Survivors = MAX_NLSF_MSVQ_SURVIVORS;
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psEncC->warping_Q16 = psEncC->fs_kHz * SKP_FIX_CONST( WARPING_MULTIPLIER, 16 );
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} else {
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ret = SKP_SILK_ENC_INVALID_COMPLEXITY_SETTING;
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}
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/* Do not allow higher pitch estimation LPC order than predict LPC order */
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psEncC->pitchEstimationLPCOrder = SKP_min_int( psEncC->pitchEstimationLPCOrder, psEncC->predictLPCOrder );
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psEncC->shapeWinLength = 5 * psEncC->fs_kHz + 2 * psEncC->la_shape;
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SKP_assert( psEncC->pitchEstimationLPCOrder <= MAX_FIND_PITCH_LPC_ORDER );
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SKP_assert( psEncC->shapingLPCOrder <= MAX_SHAPE_LPC_ORDER );
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SKP_assert( psEncC->nStatesDelayedDecision <= MAX_DEL_DEC_STATES );
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SKP_assert( psEncC->warping_Q16 <= 32767 );
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SKP_assert( psEncC->la_shape <= LA_SHAPE_MAX );
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SKP_assert( psEncC->shapeWinLength <= SHAPE_LPC_WIN_MAX );
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return( ret );
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}
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