81 lines
3.9 KiB
C
81 lines
3.9 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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/* Set decoder sampling rate */
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void SKP_Silk_decoder_set_fs(
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SKP_Silk_decoder_state *psDec, /* I/O Decoder state pointer */
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SKP_int fs_kHz /* I Sampling frequency (kHz) */
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)
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{
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if( psDec->fs_kHz != fs_kHz ) {
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psDec->fs_kHz = fs_kHz;
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psDec->frame_length = SKP_SMULBB( FRAME_LENGTH_MS, fs_kHz );
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psDec->subfr_length = SKP_SMULBB( FRAME_LENGTH_MS / NB_SUBFR, fs_kHz );
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if( psDec->fs_kHz == 8 ) {
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psDec->LPC_order = MIN_LPC_ORDER;
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psDec->psNLSF_CB[ 0 ] = &SKP_Silk_NLSF_CB0_10;
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psDec->psNLSF_CB[ 1 ] = &SKP_Silk_NLSF_CB1_10;
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} else {
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psDec->LPC_order = MAX_LPC_ORDER;
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psDec->psNLSF_CB[ 0 ] = &SKP_Silk_NLSF_CB0_16;
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psDec->psNLSF_CB[ 1 ] = &SKP_Silk_NLSF_CB1_16;
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}
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/* Reset part of the decoder state */
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SKP_memset( psDec->sLPC_Q14, 0, MAX_LPC_ORDER * sizeof( SKP_int32 ) );
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SKP_memset( psDec->outBuf, 0, MAX_FRAME_LENGTH * sizeof( SKP_int16 ) );
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SKP_memset( psDec->prevNLSF_Q15, 0, MAX_LPC_ORDER * sizeof( SKP_int ) );
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psDec->lagPrev = 100;
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psDec->LastGainIndex = 1;
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psDec->prev_sigtype = 0;
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psDec->first_frame_after_reset = 1;
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if( fs_kHz == 24 ) {
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psDec->HP_A = SKP_Silk_Dec_A_HP_24;
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psDec->HP_B = SKP_Silk_Dec_B_HP_24;
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} else if( fs_kHz == 16 ) {
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psDec->HP_A = SKP_Silk_Dec_A_HP_16;
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psDec->HP_B = SKP_Silk_Dec_B_HP_16;
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} else if( fs_kHz == 12 ) {
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psDec->HP_A = SKP_Silk_Dec_A_HP_12;
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psDec->HP_B = SKP_Silk_Dec_B_HP_12;
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} else if( fs_kHz == 8 ) {
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psDec->HP_A = SKP_Silk_Dec_A_HP_8;
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psDec->HP_B = SKP_Silk_Dec_B_HP_8;
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} else {
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/* unsupported sampling rate */
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SKP_assert( 0 );
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}
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}
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/* Check that settings are valid */
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SKP_assert( psDec->frame_length > 0 && psDec->frame_length <= MAX_FRAME_LENGTH );
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}
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