You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
3.4 KiB
57 lines
3.4 KiB
/*
|
|
decodeLSP.h
|
|
|
|
Copyright (C) 2011 Belledonne Communications, Grenoble, France
|
|
Author : Johan Pascal
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
#ifndef DECODELSP_H
|
|
#define DECODELSP_H
|
|
|
|
/*****************************************************************************/
|
|
/* initDecodeLSP : */
|
|
/* Initialise the decodeLSP previousqLSP buffer */
|
|
/* */
|
|
/*****************************************************************************/
|
|
void initDecodeLSP(bcg729DecoderChannelContextStruct *decoderChannelContext);
|
|
|
|
/*****************************************************************************/
|
|
/* computeqLSF : get qLSF extracted from codebooks and process them */
|
|
/* according to spec 3.2.4 */
|
|
/* parameters: */
|
|
/* -(i/o) codebookqLSF : 10 values i Q2.13 to be updated */
|
|
/* -(i/o) previousCodeWord : codewords for the last 4 subframes in Q2.13*/
|
|
/* is updated by this function */
|
|
/* -(i) L0: the Switched MA predictor retrieved from bitstream */
|
|
/* -(i) currentMAPredictor : MAPredictor to use, noise or voice frame */
|
|
/* -(i) currentMAPredictorSum : same as previous */
|
|
/* */
|
|
/*****************************************************************************/
|
|
void computeqLSF(word16_t *codebookqLSF, word16_t previousLCodeWord[MA_MAX_K][NB_LSP_COEFF], uint8_t L0, word16_t currentMAPredictor[L0_RANGE][MA_MAX_K][NB_LSP_COEFF], word16_t currentMAPredictorSum[L0_RANGE][NB_LSP_COEFF]);
|
|
|
|
/*****************************************************************************/
|
|
/* decodeLSP : decode LSP coefficients as in spec 4.1.1/3.2.4 */
|
|
/* parameters: */
|
|
/* -(i/o) decoderChannelContext : the channel context data */
|
|
/* -(i) L: 4 elements array containing L[0-3] the first and */
|
|
/* second stage vector of LSP quantizer */
|
|
/* -(i) frameErased : a boolean, when true, frame has been erased */
|
|
/* -(o) qLSP: 10 quantized LSP coefficients in Q15 in range [-1,+1[ */
|
|
/* */
|
|
/*****************************************************************************/
|
|
void decodeLSP(bcg729DecoderChannelContextStruct *decoderChannelContext, uint16_t L[], word16_t qLSP[], uint8_t frameErased);
|
|
|
|
#endif /* ifndef DECODELSP_H */
|