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146 lines
7.8 KiB
146 lines
7.8 KiB
/*
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typedef.h
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Copyright (C) 2011 Belledonne Communications, Grenoble, France
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Author : Johan Pascal
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef TYPEDEF_H
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#define TYPEDEF_H
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#include <stdint.h>
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#include "codecParameters.h"
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#include "bcg729/encoder.h"
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#include "bcg729/decoder.h"
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typedef int16_t word16_t;
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typedef uint16_t uword16_t;
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typedef int32_t word32_t;
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typedef uint32_t uword32_t;
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typedef int64_t word64_t;
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/* define the context structure to store all static data for a decoder channel */
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struct bcg729DecoderChannelContextStruct_struct {
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/*** buffers used in decoder bloc ***/
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word16_t previousqLSP[NB_LSP_COEFF]; /* previous quantised LSP in Q0.15 */
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word16_t excitationVector[L_PAST_EXCITATION + L_FRAME]; /* in Q0 this vector contains:
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0->153 : the past excitation vector.(length is Max Pitch Delay: 144 + interpolation window size : 10)
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154-> 154+L_FRAME-1 : the current frame adaptative Code Vector first used to compute then the excitation vector */
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word16_t boundedAdaptativeCodebookGain; /* the pitch gain from last subframe bounded in range [0.2,0.8] in Q0.14 */
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word16_t adaptativeCodebookGain; /* the gains needs to be stored in case of frame erasure in Q14 */
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word16_t fixedCodebookGain; /* in Q14.1 */
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word16_t reconstructedSpeech[NB_LSP_COEFF+L_FRAME]; /* in Q0, output of the LP synthesis filter, the first 10 words store the previous frame output */
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uint16_t pseudoRandomSeed; /* seed used in the pseudo random number generator */
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/*** buffers used in decodeLSP bloc ***/
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word16_t lastqLSF[NB_LSP_COEFF]; /* this buffer stores the last qLSF to be used in case of frame lost in Q2.13 */
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/* buffer to store the last 4 frames codewords, used to compute the current qLSF */
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word16_t previousLCodeWord[MA_MAX_K][NB_LSP_COEFF]; /* in Q2.13, buffer to store the last 4 frames codewords, used to compute the current qLSF */
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/* the values stored are the codewords computed from the codebooks and rearranged */
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word16_t lastValidL0; /* this one store the L0 of last valid frame to be used in case of frame erased */
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/*** buffer used in decodeAdaptativeCodeVector bloc ***/
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uint16_t previousIntPitchDelay; /* store the last valid Integer Pitch Delay computed, used in case of parity error or frame erased */
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/*** buffer used in decodeGains bloc ***/
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word16_t previousGainPredictionError[4]; /* the last four gain prediction error U(m) eq69 and eq72, spec3.9.1 in Q10*/
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/*** buffers used in postFilter bloc ***/
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word16_t residualSignalBuffer[MAXIMUM_INT_PITCH_DELAY+L_FRAME]; /* store the residual signal (current subframe and MAXIMUM_INT_PITCH_DELAY of previous values) in Q0 */
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word16_t scaledResidualSignalBuffer[MAXIMUM_INT_PITCH_DELAY+L_FRAME]; /* same as previous but in Q-2 */
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word16_t longTermFilteredResidualSignalBuffer[1+L_SUBFRAME]; /* the output of long term filter in Q0, need 1 word from previous subframe for tilt compensation filter */
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word16_t *longTermFilteredResidualSignal; /* points to the beginning of current subframe longTermFilteredResidualSignal */
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word16_t shortTermFilteredResidualSignalBuffer[NB_LSP_COEFF+L_SUBFRAME]; /* the output of short term filter(synthesis filter) in Q0, need NB_LSP_COEFF word from previous subframe as filter memory */
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word16_t *shortTermFilteredResidualSignal; /* points to the beginning of current subframe shortTermFilteredResidualSignal */
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word16_t previousAdaptativeGain; /* previous gain for adaptative gain control */
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/*** buffers used in postProcessing bloc ***/
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word16_t inputX0;
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word16_t inputX1;
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word32_t outputY2;
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word32_t outputY1;
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};
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/* define the context structure to store all static data for an encoder channel */
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struct bcg729EncoderChannelContextStruct_struct {
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/*** buffers used in decoder bloc ***/
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/* Signal buffer mapping : 240 word16_t length */
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/* <---- 120 word16_t -->|<---- 80 word16_t ---->|<---- 40 word16_t --->| */
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/* |----- old signal -----|----------- current frame -------------------|-----next subframe 1 ------------| */
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/* |----- subframe 1 -----|----- subframe 2 -----| */
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/* |--------------- last input frame -----------------------| */
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/* ^ ^ ^ */
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/* | | | */
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/* signalBuffer signalCurrentFrame signalLastInputFrame */
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word16_t signalBuffer[L_LP_ANALYSIS_WINDOW]; /* this buffer stores the input signal */
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word16_t *signalLastInputFrame; /* point to the beginning of the last frame in the signal buffer */
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word16_t *signalCurrentFrame; /* point to the beginning of the current frame in the signal buffer */
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word16_t previousLSPCoefficients[NB_LSP_COEFF]; /* LSP coefficient of previous frame */
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word16_t previousqLSPCoefficients[NB_LSP_COEFF]; /* Quantized LSP coefficient of previous frame */
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word16_t weightedInputSignal[MAXIMUM_INT_PITCH_DELAY+L_FRAME]; /* buffer storing the weightedInputSignal on current frame and MAXIMUM_INT_PITCH_DELAY of previous values */
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word16_t excitationVector[L_PAST_EXCITATION + L_FRAME]; /* in Q0 this vector contains:
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0->153 : the past excitation vector.(length is Max Pitch Delay: 144 + interpolation window size : 10)
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154-> 154+L_FRAME-1 : the current frame adaptative Code Vector first used to compute then the excitation vector */
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word16_t targetSignal[NB_LSP_COEFF+L_SUBFRAME]; /* in Q0, buffer holding the target signal (x[n]) as in spec A.3.6, the first NB_LSP_COEFF values are memory from previous subframe used in filtering(computed according to spec A.3.10), the following values are the target signal for current subframe */
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word16_t lastQuantizedAdaptativeCodebookGain; /* in Q14, the quantized adaptive codebook gain from previous subframe */
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/*** buffer used in preProcessing ***/
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word16_t inputX0, inputX1;
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word32_t outputY2, outputY1;
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/*** buffer used in LSPQuantization ***/
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word16_t previousqLSF[MA_MAX_K][NB_LSP_COEFF]; /* previousqLSF of the last 4(MA pred buffer size) frames in Q13, contains actually quantizer output (l) and not LSF (w)*/
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/*** buffer used in gainQuantization ***/
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word16_t previousGainPredictionError[4]; /* the last four gain prediction error U(m) eq69 and eq72, spec3.9.1 in Q10*/
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};
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/* MAXINTXX define the maximum signed integer value on XX bits(2^(XX-1) - 1) */
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/* used to check on overflows in fixed point mode */
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#define MAXINT16 0x7fff
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#define MAXINT28 0x7ffffff
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#define MAXINT29 0xfffffff
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#define MININT32 0x80000000
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#define MAXINT32 0x7fffffff
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#define MAXINT64 0x7fffffffffffffffLL
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/* several values used for inits */
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#define ONE_IN_Q31 0x7FFFFFFF
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#define ONE_IN_Q30 0x40000000
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#define ONE_IN_Q27 0x08000000
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#define ONE_IN_Q15 0x00008000
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#define ONE_IN_Q13 0x00002000
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#define ONE_IN_Q12 0x00001000
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#define ONE_IN_Q11 0x00000800
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#define HALF_PI_Q13 12868
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#define HALF_PI_Q15 51472
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/* 0.04*Pi + 1 and 0.92*Pi - 1 used by LSPQuantization */
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#define OO4PIPLUS1_IN_Q13 9221
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#define O92PIMINUS1_IN_Q13 15485
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/* 1.2 in Q14 */
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#define ONE_POINT_2_IN_Q14 19661
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/* 0.7 in Q12 */
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#define O7_IN_Q12 2867
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/* 0.2 in Q14 */
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#define O2_IN_Q14 3277
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/* 0.2 in Q15 */
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#define O2_IN_Q15 6554
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#endif /* ifndef TYPEDEF_H */
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