1/*
2 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11/*
12 * lpc_tables.h
13 *
14 * header file for coding tables for the LPC coefficients
15 *
16 */
17
18#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_TABLES_H_
19#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_TABLES_H_
20
21#include "structs.h"
22
23#include "settings.h"
24
25#define KLT_STEPSIZE         1.00000000
26#define KLT_NUM_AVG_GAIN     0
27#define KLT_NUM_AVG_SHAPE    0
28#define KLT_NUM_MODELS  3
29#define LPC_GAIN_SCALE     4.000f
30#define LPC_LOBAND_SCALE   2.100f
31#define LPC_LOBAND_ORDER   ORDERLO
32#define LPC_HIBAND_SCALE   0.450f
33#define LPC_HIBAND_ORDER   ORDERHI
34#define LPC_GAIN_ORDER     2
35
36#define LPC_SHAPE_ORDER    (LPC_LOBAND_ORDER + LPC_HIBAND_ORDER)
37
38#define KLT_ORDER_GAIN     (LPC_GAIN_ORDER * SUBFRAMES)
39#define KLT_ORDER_SHAPE    (LPC_SHAPE_ORDER * SUBFRAMES)
40
41/* cdf array for model indicator */
42extern const uint16_t WebRtcIsac_kQKltModelCdf[KLT_NUM_MODELS+1];
43
44/* pointer to cdf array for model indicator */
45extern const uint16_t *WebRtcIsac_kQKltModelCdfPtr[1];
46
47/* initial cdf index for decoder of model indicator */
48extern const uint16_t WebRtcIsac_kQKltModelInitIndex[1];
49
50/* offset to go from rounded value to quantization index */
51extern const short WebRtcIsac_kQKltQuantMinGain[12];
52
53extern const short WebRtcIsac_kQKltQuantMinShape[108];
54
55/* maximum quantization index */
56extern const uint16_t WebRtcIsac_kQKltMaxIndGain[12];
57
58extern const uint16_t WebRtcIsac_kQKltMaxIndShape[108];
59
60/* index offset */
61extern const uint16_t WebRtcIsac_kQKltOffsetGain[12];
62
63extern const uint16_t WebRtcIsac_kQKltOffsetShape[108];
64
65/* initial cdf index for KLT coefficients */
66extern const uint16_t WebRtcIsac_kQKltInitIndexGain[12];
67
68extern const uint16_t WebRtcIsac_kQKltInitIndexShape[108];
69
70/* quantizer representation levels */
71extern const double WebRtcIsac_kQKltLevelsGain[392];
72
73extern const double WebRtcIsac_kQKltLevelsShape[578];
74
75/* cdf tables for quantizer indices */
76extern const uint16_t WebRtcIsac_kQKltCdfGain[404];
77
78extern const uint16_t WebRtcIsac_kQKltCdfShape[686];
79
80/* pointers to cdf tables for quantizer indices */
81extern const uint16_t *WebRtcIsac_kQKltCdfPtrGain[12];
82
83extern const uint16_t *WebRtcIsac_kQKltCdfPtrShape[108];
84
85/* left KLT transforms */
86extern const double WebRtcIsac_kKltT1Gain[4];
87
88extern const double WebRtcIsac_kKltT1Shape[324];
89
90/* right KLT transforms */
91extern const double WebRtcIsac_kKltT2Gain[36];
92
93extern const double WebRtcIsac_kKltT2Shape[36];
94
95/* means of log gains and LAR coefficients */
96extern const double WebRtcIsac_kLpcMeansGain[12];
97
98extern const double WebRtcIsac_kLpcMeansShape[108];
99
100#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_LPC_TABLES_H_ */
101