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/*
* FILE: audio.h
* PROGRAM: RAT
* AUTHOR: Isidor Kouvelas / Orion Hodson / Colin Perkins
*
* Copyright (c) 1995-2001 University College London
* All rights reserved.
*
* $Id: audio_util.h,v 1.12 2001/01/08 20:29:52 ucaccsp Exp $
*/
#ifndef __AUDIO_UTIL_H__
#define __AUDIO_UTIL_H__
void audio_zero (sample *buf, int len, deve_e type);
void audio_mix (sample *dst, sample *in, int len);
#ifdef WIN32
BOOL mmx_present();
void audio_mix_mmx(sample *dst, sample *in, int len);
#endif
void audio_scale_buffer(sample *buf, int len, double scale);
/* Energy calculation */
uint16_t audio_avg_energy (sample *buf, uint32_t dur, uint32_t channels);
sample audio_abs_max(sample *buf, uint32_t samples);
void audio_blend(sample *from, sample *to, sample *dst, int samples, int channels);
/* Biasing operations */
struct s_bias_ctl;
struct s_bias_ctl*
bias_ctl_create(int channels, int freq);
void bias_ctl_destroy(struct s_bias_ctl *bc);
void bias_remove (struct s_bias_ctl *bc, sample *buf, int len);
#endif /* __AUDIO_UTIL_H__ */
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