gtagc32.h

ARM平台下的数字音频AGC处理源代码 采用EP9302,对数字音频进行AGC处理

#ifndef _GTAGC32_H
#define _GTAGC32_H

#define   MAX24bit   (1024*1024*8)
#define	AD_RATIO	0.96 //最大值 与 0dB对应电平 的比值
#define 	REF_0dB	((float)(MAX24bit/AD_RATIO))


typedef struct
{
	int	sample_max;
	int	vu_value;
	int	ppm_value;	
	
}GtPredata;

typedef struct //0~对应左声道, 1~对应右声道
{
	int			sample_max[2];
	float		pre_sum[2]; /*宸﹀０閬撲负0, 鍙冲０閬撲负1*/
	float		post_sum[2];
	int			pre_max[2]; /*宸﹀０閬撲负0, 鍙冲０閬撲负1*/
	int			post_max[2];

	int			pre_max1[2]; /*宸﹀０閬撲负0, 鍙冲０閬撲负1*/
	int			post_max1[2];

	int			counter[2];
	float		gain[2];
	float		pk;
	long		peak;
	int			silence_counter[2];
	long		silence_threshold;
	long		active_threshold;

}GtAGC; 




GtAGC* NewGtagc(int peek_leval, int  dynamic_theshold, int noise_threshold, int inputmode);
int		SetGtagc(GtAGC *agc, int peek_leval, int  dynamic_theshold, int noise_threshold, int inputmode);
void DoGtagc(GtAGC *agc, long *buffer, int len, int v, int bpcount,int adaes3);
void DeleteGtagc(GtAGC *agc);

#endif