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source: webrtc/webrtc/modules/audio_coding/codecs/isac/main/source/filterbank_tables.h @ 0:4bda6873e34c

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Last change on this file since 0:4bda6873e34c was 0:4bda6873e34c, checked in by Michael Prittie <mprittie@…>, 6 years ago

Scrubbed password for publication.

File size: 1.6 KB
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1/*
2 *  Copyright (c) 2011 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 * filterbank_tables.h
13 *
14 * Header file for variables that are defined in
15 * filterbank_tables.c.
16 *
17 */
18
19#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_
20#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_
21
22#include "structs.h"
23
24/********************* Coefficient Tables ************************/
25/* The number of composite all-pass filter factors */
26#define NUMBEROFCOMPOSITEAPSECTIONS 4
27
28/* The number of all-pass filter factors in an upper or lower channel*/
29#define NUMBEROFCHANNELAPSECTIONS 2
30
31/* The composite all-pass filter factors */
32extern const float WebRtcIsac_kCompositeApFactorsFloat[4];
33
34/* The upper channel all-pass filter factors */
35extern const float WebRtcIsac_kUpperApFactorsFloat[2];
36
37/* The lower channel all-pass filter factors */
38extern const float WebRtcIsac_kLowerApFactorsFloat[2];
39
40/* The matrix for transforming the backward composite state to upper channel state */
41extern const float WebRtcIsac_kTransform1Float[8];
42
43/* The matrix for transforming the backward composite state to lower channel state */
44extern const float WebRtcIsac_kTransform2Float[8];
45
46#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_ */
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