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/*
* FILE: auddev.h
* PROGRAM: RAT
* AUTHOR: Orion Hodson
*
* Note: Original audio interface by Isidor Kouvelas, Colin Perkins,
* and OH. OH has gone through and modularised this code so that RAT
* can detect and use multiple audio devices.
*
* Copyright (c) 1995-2001 University College London
* All rights reserved.
*
* $Id: auddev.h,v 1.16 2001/01/08 20:29:47 ucaccsp Exp $
*/
#ifndef _AUDDEV_H_
#define _AUDDEV_H_
#include "audio_types.h"
/* Audio interface fn's for dealing with multiple devices/device interfaces */
int audio_init_interfaces (void);
int audio_free_interfaces (void);
uint32_t audio_get_device_count (void);
const audio_device_details_t*
audio_get_device_details (uint32_t idx);
int audio_get_null_device (void); /* gets null dev interface */
int audio_device_supports (audio_desc_t ad, uint16_t rate, uint16_t channels);
int audio_device_is_open (audio_desc_t ad);
/* Audio functions implemented by device interfaces */
int audio_open (audio_desc_t ad, audio_format *in_format, audio_format *out_format);
void audio_close (audio_desc_t ad);
void audio_drain (audio_desc_t ad);
void audio_set_igain (audio_desc_t ad, int gain);
int audio_duplex (audio_desc_t ad);
int audio_get_igain (audio_desc_t ad);
void audio_set_ogain (audio_desc_t ad, int vol);
int audio_get_ogain (audio_desc_t ad);
void audio_loopback (audio_desc_t ad, int gain);
int audio_read (audio_desc_t ad, sample *buf, int samples);
int audio_write (audio_desc_t ad, sample *buf, int samples);
void audio_non_block (audio_desc_t ad);
void audio_block (audio_desc_t ad);
void audio_set_oport (audio_desc_t ad, audio_port_t);
audio_port_t audio_get_oport (audio_desc_t ad);
int audio_get_oport_count (audio_desc_t ad);
const audio_port_details_t* audio_get_oport_details (audio_desc_t ad, int port_idx);
void audio_set_iport (audio_desc_t ad, audio_port_t);
audio_port_t audio_get_iport (audio_desc_t ad);
int audio_get_iport_count (audio_desc_t ad);
const audio_port_details_t* audio_get_iport_details (audio_desc_t ad, int port_idx);
int audio_is_ready (audio_desc_t ad);
void audio_wait_for (audio_desc_t ad, int granularity_ms);
const audio_format* audio_get_ifmt (audio_desc_t ad);
const audio_format* audio_get_ofmt (audio_desc_t ad);
/* audio_get_samples_{read,written} return the actual number of
* sample instances that have been read/written. audio_get_device_time
* returns the number of samples read rounded down to the nearest
* number of whole sample blocks.
*/
uint32_t audio_get_device_time (audio_desc_t ad);
uint32_t audio_get_samples_written (audio_desc_t ad);
uint32_t audio_get_samples_read (audio_desc_t ad);
#endif /* _AUDDEV_H_ */
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