47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* filterbank_tables.h
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*
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* Header file for variables that are defined in
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* filterbank_tables.c.
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*
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*/
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#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_
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#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_
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#include "structs.h"
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/********************* Coefficient Tables ************************/
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/* The number of composite all-pass filter factors */
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#define NUMBEROFCOMPOSITEAPSECTIONS 4
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/* The number of all-pass filter factors in an upper or lower channel*/
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#define NUMBEROFCHANNELAPSECTIONS 2
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/* The composite all-pass filter factors */
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extern const float WebRtcIsac_kCompositeApFactorsFloat[4];
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/* The upper channel all-pass filter factors */
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extern const float WebRtcIsac_kUpperApFactorsFloat[2];
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/* The lower channel all-pass filter factors */
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extern const float WebRtcIsac_kLowerApFactorsFloat[2];
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/* The matrix for transforming the backward composite state to upper channel state */
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extern const float WebRtcIsac_kTransform1Float[8];
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/* The matrix for transforming the backward composite state to lower channel state */
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extern const float WebRtcIsac_kTransform2Float[8];
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#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_FILTERBANK_TABLES_H_ */
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