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git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d

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niklase@google.com
2011-05-30 11:22:19 +00:00
parent 01813fe945
commit 77ae29bc81
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modules/audio_coding/codecs/iSAC/main/source/lpc_tables.h Normal file
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/*
* lpc_tables.h
*
* header file for coding tables for the LPC coefficients
*
*/
#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_TABLES_H_
#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_TABLES_H_
#include "structs.h"
#include "settings.h"
#define KLT_STEPSIZE 1.00000000
#define KLT_NUM_AVG_GAIN 0
#define KLT_NUM_AVG_SHAPE 0
#define KLT_NUM_MODELS 3
#define LPC_GAIN_SCALE 4.000f
#define LPC_LOBAND_SCALE 2.100f
#define LPC_LOBAND_ORDER ORDERLO
#define LPC_HIBAND_SCALE 0.450f
#define LPC_HIBAND_ORDER ORDERHI
#define LPC_GAIN_ORDER 2
#define LPC_SHAPE_ORDER (LPC_LOBAND_ORDER + LPC_HIBAND_ORDER)
#define KLT_ORDER_GAIN (LPC_GAIN_ORDER * SUBFRAMES)
#define KLT_ORDER_SHAPE (LPC_SHAPE_ORDER * SUBFRAMES)
/* indices of KLT coefficients used */
extern const WebRtc_UWord16 WebRtcIsac_kQKltSelIndGain[12];
extern const WebRtc_UWord16 WebRtcIsac_kQKltSelIndShape[108];
/* cdf array for model indicator */
extern const WebRtc_UWord16 WebRtcIsac_kQKltModelCdf[KLT_NUM_MODELS+1];
/* pointer to cdf array for model indicator */
extern const WebRtc_UWord16 *WebRtcIsac_kQKltModelCdfPtr[1];
/* initial cdf index for decoder of model indicator */
extern const WebRtc_UWord16 WebRtcIsac_kQKltModelInitIndex[1];
/* offset to go from rounded value to quantization index */
extern const short WebRtcIsac_kQKltQuantMinGain[12];
extern const short WebRtcIsac_kQKltQuantMinShape[108];
/* maximum quantization index */
extern const WebRtc_UWord16 WebRtcIsac_kQKltMaxIndGain[12];
extern const WebRtc_UWord16 WebRtcIsac_kQKltMaxIndShape[108];
/* index offset */
extern const WebRtc_UWord16 WebRtcIsac_kQKltOffsetGain[KLT_NUM_MODELS][12];
extern const WebRtc_UWord16 WebRtcIsac_kQKltOffsetShape[KLT_NUM_MODELS][108];
/* initial cdf index for KLT coefficients */
extern const WebRtc_UWord16 WebRtcIsac_kQKltInitIndexGain[KLT_NUM_MODELS][12];
extern const WebRtc_UWord16 WebRtcIsac_kQKltInitIndexShape[KLT_NUM_MODELS][108];
/* offsets for quantizer representation levels */
extern const WebRtc_UWord16 WebRtcIsac_kQKltOfLevelsGain[3];
extern const WebRtc_UWord16 WebRtcIsac_kQKltOfLevelsShape[3];
/* quantizer representation levels */
extern const double WebRtcIsac_kQKltLevelsGain[1176];
extern const double WebRtcIsac_kQKltLevelsShape[1735];
/* cdf tables for quantizer indices */
extern const WebRtc_UWord16 WebRtcIsac_kQKltCdfGain[1212];
extern const WebRtc_UWord16 WebRtcIsac_kQKltCdfShape[2059];
/* pointers to cdf tables for quantizer indices */
extern const WebRtc_UWord16 *WebRtcIsac_kQKltCdfPtrGain[KLT_NUM_MODELS][12];
extern const WebRtc_UWord16 *WebRtcIsac_kQKltCdfPtrShape[KLT_NUM_MODELS][108];
/* code length for all coefficients using different models */
extern const double WebRtcIsac_kQKltCodeLenGain[392];
extern const double WebRtcIsac_kQKltCodeLenShape[578];
/* left KLT transforms */
extern const double WebRtcIsac_kKltT1Gain[KLT_NUM_MODELS][4];
extern const double WebRtcIsac_kKltT1Shape[KLT_NUM_MODELS][324];
/* right KLT transforms */
extern const double WebRtcIsac_kKltT2Gain[KLT_NUM_MODELS][36];
extern const double WebRtcIsac_kKltT2Shape[KLT_NUM_MODELS][36];
/* means of log gains and LAR coefficients */
extern const double WebRtcIsac_kLpcMeansGain[KLT_NUM_MODELS][12];
extern const double WebRtcIsac_kLpcMeansShape[KLT_NUM_MODELS][108];
#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_TABLES_H_ */