huxi
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
#ifdef SUPPORT_MS_EXTENSIONS
|
|
#pragma bss_seg(".audio_dc_offset_remove.data.bss")
|
|
#pragma data_seg(".audio_dc_offset_remove.data")
|
|
#pragma const_seg(".audio_dc_offset_remove.text.const")
|
|
#pragma code_seg(".audio_dc_offset_remove.text")
|
|
#endif
|
|
/*
|
|
****************************************************************
|
|
* Audio DC-Offset Remove
|
|
* Brief : 去除直流偏移
|
|
* Notes :
|
|
*
|
|
****************************************************************
|
|
*/
|
|
#include "audio_dc_offset_remove.h"
|
|
#include "app_config.h"
|
|
|
|
//一段高通滤波器 可调中心截止频率、带宽
|
|
//默认Freq:100Hz Gain:0 Q:0.7f
|
|
static struct eq_seg_info dccs_eq_tab_8k[] = {
|
|
{0, EQ_IIR_TYPE_HIGH_PASS, 100, 0, 0.7f},
|
|
};
|
|
static struct eq_seg_info dccs_eq_tab_16k[] = {
|
|
{0, EQ_IIR_TYPE_HIGH_PASS, 100, 0, 0.7f},
|
|
};
|
|
|
|
//使用EQ模块去除直流偏置配置
|
|
#if TCFG_EQ_ENABLE
|
|
#define DCC_VIA_EQ_ENABLE 1
|
|
#else
|
|
#define DCC_VIA_EQ_ENABLE 0
|
|
#endif/*TCFG_EQ_ENABLE*/
|
|
|
|
|
|
/*
|
|
*********************************************************************
|
|
* Audio DC-Offset Remove Open
|
|
* Description:
|
|
* Arguments : sample_rate
|
|
* ch_num
|
|
* Return : Null
|
|
* Note(s) :
|
|
*********************************************************************
|
|
*/
|
|
void *audio_dc_offset_remove_open(u32 sample_rate, u32 ch_num)
|
|
{
|
|
#if DCC_VIA_EQ_ENABLE
|
|
struct audio_eq_param eq_param = {0};
|
|
eq_param.channels = ch_num;
|
|
eq_param.sr = sample_rate;
|
|
eq_param.cb = eq_get_filter_info;
|
|
eq_param.global_gain = 0;
|
|
if (sample_rate == 8000) {
|
|
eq_param.max_nsection = eq_param.nsection = ARRAY_SIZE(dccs_eq_tab_8k);
|
|
eq_param.seg = dccs_eq_tab_8k;
|
|
} else {
|
|
eq_param.max_nsection = eq_param.nsection = ARRAY_SIZE(dccs_eq_tab_16k);
|
|
eq_param.seg = dccs_eq_tab_16k;
|
|
}
|
|
struct audio_eq *eq = audio_dec_eq_open(&eq_param);
|
|
return (void *)eq;
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
*********************************************************************
|
|
* Audio DC-Offset Remove Run
|
|
* Description:
|
|
* Arguments : hdl
|
|
* data
|
|
* len
|
|
* Return : Null
|
|
* Note(s) :
|
|
*********************************************************************
|
|
*/
|
|
void audio_dc_offset_remove_run(void *hdl, void *data, u32 len)
|
|
{
|
|
#if DCC_VIA_EQ_ENABLE
|
|
if (hdl) {
|
|
audio_dec_eq_run(hdl, (s16 *)data, (s16 *)data, len);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
*********************************************************************
|
|
* Audio DC-Offset Remove Close
|
|
* Description:
|
|
* Arguments : hdl
|
|
* Return : Null
|
|
* Note(s) :
|
|
*********************************************************************
|
|
*/
|
|
void audio_dc_offset_remove_close(void *hdl)
|
|
{
|
|
#if DCC_VIA_EQ_ENABLE
|
|
if (hdl) {
|
|
audio_dec_eq_close(hdl);
|
|
/* hdl = NULL; */
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
|