70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/***************************************************************************
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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 All unpublished rights reserved.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 __SPEECH_IIR_H__
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#define __SPEECH_IIR_H__
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SPEECH_IIR_COEFF_LEN (5)
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typedef float SPEECH_RX_EQ_PCOEFFS_T[SPEECH_IIR_COEFF_LEN];
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typedef struct {
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int32_t numStages;
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// {
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// {b10, b11, b12, a11, a12},
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// {b20, b21, b22, a21, a22},
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// ...
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// }
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// const float (*pCoeffs)[SPEECH_IIR_COEFF_LEN];
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SPEECH_RX_EQ_PCOEFFS_T *pCoeffs;
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} SPEECH_IIR_CFG_T;
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typedef void SPEECH_IIR_STATE_T;
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// Initial speech_iir module/class
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int speech_iir_init(void);
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// Deinitial speech_iir module/calss
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int speech_iir_deinit(void);
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// Creat a instance from speech_iir module/class
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// Common value include: sample rate, frame size and so on.
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SPEECH_IIR_STATE_T *speech_iir_create(const SPEECH_IIR_CFG_T *cfg);
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// Destory a speech iir instance
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int speech_iir_destroy(SPEECH_IIR_STATE_T *inst);
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// Just use modify instance configure
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int speech_iir_set_config(SPEECH_IIR_STATE_T *inst, const SPEECH_IIR_CFG_T *cfg);
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// Process speech stream
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int speech_iir_process(SPEECH_IIR_STATE_T *inst, int16_t *pcm_buf, int32_t pcm_len);
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// Debug speech_iir instance
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int speech_iir_dump(SPEECH_IIR_STATE_T *inst);
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#ifdef __cplusplus
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}
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#endif
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#endif
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