application/audio/tl_audio.h

/******************************************************************************
 * @file     tl_audio.h
 *
 * @brief    for TLSR chips
 *
 * @author   public@telink-semi.com;
 * @date     Sep. 30, 2010
 *
 * @attention
 *
 *  Copyright (C) 2019-2020 Telink Semiconductor (Shanghai) Co., Ltd.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *****************************************************************************/

#ifndef TL_AUDIO_H_
#define TL_AUDIO_H_

#include "tl_common.h"
#include "audio_config.h"



#if (TL_AUDIO_MODE & RCU_PROJECT)                                //RCU
#ifndef        TL_NOISE_SUPPRESSION_ENABLE
#define        TL_NOISE_SUPPRESSION_ENABLE            0
#endif

#ifndef        IIR_FILTER_ENABLE
#define        IIR_FILTER_ENABLE                     0
#endif

#ifndef        TL_MIC_PACKET_BUFFER_NUM
#define        TL_MIC_PACKET_BUFFER_NUM              8
#endif

#ifndef        MIC_SHORT_DEC_SIZE
#define        MIC_SHORT_DEC_SIZE                    0
#endif

#ifndef        ADPCM_PACKET_LEN
#define        ADPCM_PACKET_LEN                      0
#endif

#ifndef     TL_MIC_ADPCM_UNIT_SIZE
#define     TL_MIC_ADPCM_UNIT_SIZE                   0
#endif

#ifndef        TL_MIC_BUFFER_SIZE
#define        TL_MIC_BUFFER_SIZE                    0
#endif

#if TL_MIC_BUFFER_SIZE
s16        buffer_mic[TL_MIC_BUFFER_SIZE>>1];
#endif

#if TL_NOISE_SUPPRESSION_ENABLE
extern int md_long;
extern int md_short;
extern int md_im;
extern int md_noise;
extern int md_gain;

static inline int noise_suppression (s16 md) {

    static int md_th =384;
    //static int md_long =0;
    //static int md_short =0;
    //static int md_im =0;
    //static int md_noise = 0;
    //static int md_gain = 256;
        md_long = ((md_long * 1023) + abs (md)) >> 10;
        md_short = ((md_short * 127) + abs (md)) >> 7;
        md_im = ((md_im * 15) + abs (md)) >> 4;

        //md_long = ((md_long * 127) + abs (md)) >> 7;
        //md_short = ((md_short * 31) + abs (md)) >> 5;
        //md_im = ((md_im * 3) + abs (md)) >> 2;

        if ((md_noise && (md_short > md_th)) || (md_im > (md_th<<1))) {
            md_noise = 0;
            md_long = md_short << 2;
        }
        else if (!md_noise && md_long < md_th) {
            md_noise = 1;
        }
        if (md_noise) {
            if (md_gain) { md_gain --; }
        }
        else {
            if (md_gain < 256) { md_gain ++;}
        }

        return (md * md_gain + 128) >> 8;
}
#endif

void     voice_iir_OOB(signed short * ps, signed short *pd, int* coef, int nsample,u8 shift);
void     voice_iir(signed short * ps, signed short *pd, int* coef, int nsample,u8 shift);
void     Audio_VolumeSet(unsigned char input_output_select,unsigned char volume_set_value);
void     filter_setting();

void     audio_mic_param_init(void);
void    proc_mic_encoder (void);
int    *    mic_encoder_data_buffer ();
void     mic_encoder_data_read_ok (void);

#elif (TL_AUDIO_MODE & DONGLE_PROJECT)                                //Dongle

void abuf_init ();
void abuf_mic_add (u32 *p);
void abuf_mic_dec ();
void abuf_dec_usb ();

#endif
#endif /* TL_AUDIO_H_ */