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https://github.com/kichikuou/xsystem35-sdl2.git
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100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/*
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* audio.h audiodevice control
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*
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* Copyright (C) 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
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* 1998- <masaki-c@is.aist-nara.ac.jp>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* $Id: audio.h,v 1.13 2003/01/04 17:01:02 chikama Exp $ */
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#ifndef __AUDIO_H__
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#define __AUDIO_H__
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#include "portab.h"
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#define MIX_NRDEVICES 4
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#define MIX_MASTER 0
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#define MIX_CD 1
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#define MIX_MIDI 2
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#define MIX_PCM 3
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struct _chanfmt {
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int rate; /* Hz */
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int bit; /* 1 or 2 */
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int ch; /* 1 or 2 */
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};
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typedef struct _chanfmt chanfmt_t;
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struct _audiodevbuf {
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int len; // buffere length
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BYTE *cur; // current filling buffer adderss
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BYTE *end; // current buffer end
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int sw; // cur is b[sw]
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BYTE *b[2]; // buffer
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boolean ready[2]; // buffer is ready to send device
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int lenmax; // work
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};
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typedef struct _audiodevbuf audiodevbuf_t;
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struct _audiodevice {
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int id; // audio type id
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int fd; // discpriter for write
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void *data_pcm;
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void *data_mix;
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audiodevbuf_t buf;
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boolean opened;
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int (*open)(struct _audiodevice *dev, chanfmt_t fmt);
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int (*close)(struct _audiodevice *dev);
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int (*write)(struct _audiodevice *dev, BYTE *buf, int cnt);
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void (*mix_set)(struct _audiodevice *dev, int ch, int val);
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int (*mix_get)(struct _audiodevice *dev, int ch);
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int (*exit)(struct _audiodevice *dev);
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};
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typedef struct _audiodevice audiodevice_t;
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enum {
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AUDIO_PCM_OSS,
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AUDIO_PCM_ALSA,
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AUDIO_PCM_ESD,
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AUDIO_PCM_SDL,
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AUDIO_PCM_ARTS,
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AUDIO_PCM_SUN,
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AUDIO_PCM_ANY,
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AUDIO_PCM_DMY
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};
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extern int audio_init(audiodevice_t *dev);
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extern void audio_set_output_device(char c);
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extern void audio_set_pcm_devicename(char *name);
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extern void audio_set_mixer_devicename(char *name);
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extern void audio_set_alsa_mixser_element(char *fn);
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#endif /* __AUDIO_H__ */
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