mirror of
https://github.com/xiph/opus.git
synced 2025-05-30 15:17:42 +00:00

- Draft updates - Updated code to produce and check test vectors - Making sure that the test vectors pass at all rates as well as for mono and stereo
108 lines
5 KiB
C
108 lines
5 KiB
C
/***********************************************************************
|
|
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, (subject to the limitations in the disclaimer below)
|
|
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 Skype Limited, nor the names of specific
|
|
contributors, may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
|
|
BY THIS LICENSE. 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.h"
|
|
|
|
/* Set decoder sampling rate */
|
|
opus_int silk_decoder_set_fs(
|
|
silk_decoder_state *psDec, /* I/O Decoder state pointer */
|
|
opus_int fs_kHz, /* I Sampling frequency (kHz) */
|
|
opus_int fs_API_Hz /* I API Sampling frequency (Hz) */
|
|
)
|
|
{
|
|
opus_int frame_length, ret = 0;
|
|
|
|
silk_assert( fs_kHz == 8 || fs_kHz == 12 || fs_kHz == 16 );
|
|
silk_assert( psDec->nb_subfr == MAX_NB_SUBFR || psDec->nb_subfr == MAX_NB_SUBFR/2 );
|
|
|
|
/* New (sub)frame length */
|
|
psDec->subfr_length = silk_SMULBB( SUB_FRAME_LENGTH_MS, fs_kHz );
|
|
frame_length = silk_SMULBB( psDec->nb_subfr, psDec->subfr_length );
|
|
|
|
/* Initialize resampler when switching internal or external sampling frequency */
|
|
if( psDec->fs_kHz != fs_kHz || psDec->fs_API_hz != fs_API_Hz ) {
|
|
/* Initialize the resampler for dec_API.c preparing resampling from fs_kHz to API_fs_Hz */
|
|
ret += silk_resampler_init( &psDec->resampler_state, silk_SMULBB( fs_kHz, 1000 ), fs_API_Hz, 0 );
|
|
|
|
psDec->fs_API_hz = fs_API_Hz;
|
|
}
|
|
|
|
if( psDec->fs_kHz != fs_kHz || frame_length != psDec->frame_length ) {
|
|
if( fs_kHz == 8 ) {
|
|
if( psDec->nb_subfr == MAX_NB_SUBFR ) {
|
|
psDec->pitch_contour_iCDF = silk_pitch_contour_NB_iCDF;
|
|
} else {
|
|
psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_NB_iCDF;
|
|
}
|
|
} else {
|
|
if( psDec->nb_subfr == MAX_NB_SUBFR ) {
|
|
psDec->pitch_contour_iCDF = silk_pitch_contour_iCDF;
|
|
} else {
|
|
psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_iCDF;
|
|
}
|
|
}
|
|
if( psDec->fs_kHz != fs_kHz ) {
|
|
psDec->ltp_mem_length = silk_SMULBB( LTP_MEM_LENGTH_MS, fs_kHz );
|
|
if( fs_kHz == 8 || fs_kHz == 12 ) {
|
|
psDec->LPC_order = MIN_LPC_ORDER;
|
|
psDec->psNLSF_CB = &silk_NLSF_CB_NB_MB;
|
|
} else {
|
|
psDec->LPC_order = MAX_LPC_ORDER;
|
|
psDec->psNLSF_CB = &silk_NLSF_CB_WB;
|
|
}
|
|
if( fs_kHz == 16 ) {
|
|
psDec->pitch_lag_low_bits_iCDF = silk_uniform8_iCDF;
|
|
} else if( fs_kHz == 12 ) {
|
|
psDec->pitch_lag_low_bits_iCDF = silk_uniform6_iCDF;
|
|
} else if( fs_kHz == 8 ) {
|
|
psDec->pitch_lag_low_bits_iCDF = silk_uniform4_iCDF;
|
|
} else {
|
|
/* unsupported sampling rate */
|
|
silk_assert( 0 );
|
|
}
|
|
psDec->first_frame_after_reset = 1;
|
|
psDec->lagPrev = 100;
|
|
psDec->LastGainIndex = 10;
|
|
psDec->prevSignalType = TYPE_NO_VOICE_ACTIVITY;
|
|
silk_memset( psDec->outBuf, 0, sizeof(psDec->outBuf));
|
|
silk_memset( psDec->sLPC_Q14_buf, 0, sizeof(psDec->sLPC_Q14_buf) );
|
|
}
|
|
|
|
psDec->fs_kHz = fs_kHz;
|
|
psDec->frame_length = frame_length;
|
|
}
|
|
|
|
/* Check that settings are valid */
|
|
silk_assert( psDec->frame_length > 0 && psDec->frame_length <= MAX_FRAME_LENGTH );
|
|
|
|
return ret;
|
|
}
|
|
|