52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/***************************************************************************
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*
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* Copyright 2015-2019 BES.
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* All rights reserved. All unpublished rights reserved.
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*
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* No part of this work may be used or reproduced in any form or by any
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* means, or stored in a database or retrieval system, without prior written
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* permission of BES.
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*
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* Use of this work is governed by a license granted by BES.
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* This work contains confidential and proprietary information of
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* BES. which is protected by copyright, trade secret,
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* trademark and other intellectual property rights.
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*
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****************************************************************************/
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#ifndef SPECTRUM_H
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#define SPECTRUM_H
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#include <stdint.h>
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#define MAX_FREQ_NUM (10)
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typedef struct
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{
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int freq_num;
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int freq_list[MAX_FREQ_NUM];
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} SpectrumConfig;
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struct SpectrumState_;
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typedef struct SpectrumState_ SpectrumState;
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#ifdef __cplusplus
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extern "C" {
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#endif
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SpectrumState *spectrum_init(int sample_rate, int frame_size, const SpectrumConfig *config);
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void spectrum_destroy(SpectrumState *st);
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/* Update input buffer, must be called every block */
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void spectrum_analysis(SpectrumState *st, const float *x);
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/* Calculate spectrum, should be called when needed */
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void spectrum_process(SpectrumState *st, float *spectrum, int spectrum_num);
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#ifdef __cplusplus
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}
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#endif
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#endif
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