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/*
* FILE: audio.h
* PROGRAM: RAT
* AUTHOR: Orion Hodson / Colin Perkins / Isidor Kouvelas
*
* Copyright (c) 1995-2001 University College London
* All rights reserved.
*
* $Id: audio.h,v 1.32 2001/01/08 20:29:51 ucaccsp Exp $
*/
#ifndef _RAT_AUDIO_H_
#define _RAT_AUDIO_H_
#include "audio_types.h"
#include "codec_types.h"
#include "auddev.h"
/* Structures used in function declarations below */
struct s_cushion_struct;
struct s_session;
struct s_mixer;
/* Structure used for reconfiguration processing */
struct s_audio_config;
/* General audio processing functions */
int audio_rw_process (struct s_session *spi, struct s_session *spo, struct s_mixer *ms);
/* audio_device_take_initial takes safe config of null audio device. All
* further devices used in rat accessed through audio_device_reconfigure.
* It is a nasty hack, but seemingly necessary in this kludge layer that
* should not exist.
*/
int audio_device_take_initial(struct s_session *sp, audio_desc_t ad);
int audio_device_release (struct s_session *sp, audio_desc_t ad);
/* Functions used for changing the device set up. Since the time it
* takes to reconfigure the device is non-deterministic and often
* longer than the mbus can tolerate we have to store requests to
* change device config. In the main process loop we can check if
* device config change is pending, if so process all outstanding mbus
* messages, then do device reconfig.
*/
void audio_device_register_change_device(struct s_session *sp,
audio_desc_t ad);
void audio_device_register_change_primary(struct s_session *sp,
codec_id_t cid);
void audio_device_register_change_render_3d(struct s_session *sp,
int enabled);
int audio_device_reconfigure (struct s_session *sp);
int audio_device_get_safe_config(struct s_audio_config **config);
#endif /* _RAT_AUDIO_H_ */
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