myvtm/Other/libaudioframework/audiodbmeter.h

#ifndef __AUDIODBMETER_H__
#define __AUDIODBMETER_H__

#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include "audiostream.h"

typedef struct audiodbmeter_t audiodbmeter_t;

struct audiodbmeter_t
{
	audiostream_t base;
	struct {
		int peak;
		int rms;
	} stat[2];
};

// note: 16bit pcm data

apr_status_t audiodbmeter_create(apr_pool_t *pool, audioengine_t *engine, audiodbmeter_t **p_audiometer);
apr_status_t audiodbmeter_destroy(audiodbmeter_t *audiometer);

apr_status_t audiodbmeter_get_peak_db(audiodbmeter_t *audiometer, int direction, int *pval);
apr_status_t audiodbmeter_get_rms_db(audiodbmeter_t *audiometer, int direction, int *pval);

#ifdef __cplusplus
} // extern "C" {
#endif

#endif //__AUDIODBMETER_H__