157 lines
4.6 KiB
C
157 lines
4.6 KiB
C
/*
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* Advanced Linux Sound Architecture
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*
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* Simple (MOD player) Instrument Format
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* Copyright (c) 1994-99 by Jaroslav Kysela <perex@suse.cz>
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*
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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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#ifndef __SOUND_AINSTR_SIMPLE_H
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#define __SOUND_AINSTR_SIMPLE_H
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#ifndef __KERNEL__
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#include <asm/types.h>
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#include <asm/byteorder.h>
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#endif
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/*
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* share types (share ID 1)
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*/
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#define SIMPLE_SHARE_FILE 0
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/*
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* wave formats
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*/
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#define SIMPLE_WAVE_16BIT 0x0001 /* 16-bit wave */
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#define SIMPLE_WAVE_UNSIGNED 0x0002 /* unsigned wave */
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#define SIMPLE_WAVE_INVERT 0x0002 /* same as unsigned wave */
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#define SIMPLE_WAVE_BACKWARD 0x0004 /* backward mode (maybe used for reverb or ping-ping loop) */
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#define SIMPLE_WAVE_LOOP 0x0008 /* loop mode */
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#define SIMPLE_WAVE_BIDIR 0x0010 /* bidirectional mode */
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#define SIMPLE_WAVE_STEREO 0x0100 /* stereo wave */
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#define SIMPLE_WAVE_ULAW 0x0200 /* uLaw compression mode */
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/*
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* instrument effects
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*/
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#define SIMPLE_EFFECT_NONE 0
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#define SIMPLE_EFFECT_REVERB 1
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#define SIMPLE_EFFECT_CHORUS 2
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#define SIMPLE_EFFECT_ECHO 3
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/*
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* instrument info
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*/
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typedef struct simple_instrument_info {
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unsigned int format; /* supported format bits */
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unsigned int effects; /* supported effects (1 << SIMPLE_EFFECT_*) */
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unsigned int max8_len; /* maximum 8-bit wave length */
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unsigned int max16_len; /* maximum 16-bit wave length */
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} simple_instrument_info_t;
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/*
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* Instrument
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*/
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typedef struct {
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unsigned int share_id[4]; /* share id - zero = no sharing */
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unsigned int format; /* wave format */
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struct {
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unsigned int number; /* some other ID for this instrument */
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unsigned int memory; /* begin of waveform in onboard memory */
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unsigned char *ptr; /* pointer to waveform in system memory */
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} address;
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unsigned int size; /* size of waveform in samples */
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unsigned int start; /* start offset in samples * 16 (lowest 4 bits - fraction) */
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unsigned int loop_start; /* loop start offset in samples * 16 (lowest 4 bits - fraction) */
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unsigned int loop_end; /* loop end offset in samples * 16 (lowest 4 bits - fraction) */
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unsigned short loop_repeat; /* loop repeat - 0 = forever */
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unsigned char effect1; /* effect 1 */
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unsigned char effect1_depth; /* 0-127 */
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unsigned char effect2; /* effect 2 */
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unsigned char effect2_depth; /* 0-127 */
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} simple_instrument_t;
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/*
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*
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* Kernel <-> user space
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* Hardware (CPU) independent section
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*
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* * = zero or more
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* + = one or more
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*
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* simple_xinstrument SIMPLE_STRU_INSTR
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*
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*/
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#define SIMPLE_STRU_INSTR __cpu_to_be32(('I'<<24)|('N'<<16)|('S'<<8)|'T')
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/*
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* Instrument
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*/
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typedef struct simple_xinstrument {
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__u32 stype;
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__u32 share_id[4]; /* share id - zero = no sharing */
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__u32 format; /* wave format */
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__u32 size; /* size of waveform in samples */
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__u32 start; /* start offset in samples * 16 (lowest 4 bits - fraction) */
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__u32 loop_start; /* bits loop start offset in samples * 16 (lowest 4 bits - fraction) */
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__u32 loop_end; /* loop start offset in samples * 16 (lowest 4 bits - fraction) */
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__u16 loop_repeat; /* loop repeat - 0 = forever */
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__u8 effect1; /* effect 1 */
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__u8 effect1_depth; /* 0-127 */
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__u8 effect2; /* effect 2 */
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__u8 effect2_depth; /* 0-127 */
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} simple_xinstrument_t;
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#ifdef __KERNEL__
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#include "seq_instr.h"
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typedef struct {
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void *private_data;
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int (*info)(void *private_data, simple_instrument_info_t *info);
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int (*put_sample)(void *private_data, simple_instrument_t *instr,
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char __user *data, long len, int atomic);
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int (*get_sample)(void *private_data, simple_instrument_t *instr,
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char __user *data, long len, int atomic);
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int (*remove_sample)(void *private_data, simple_instrument_t *instr,
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int atomic);
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void (*notify)(void *private_data, snd_seq_kinstr_t *instr, int what);
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snd_seq_kinstr_ops_t kops;
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} snd_simple_ops_t;
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int snd_seq_simple_init(snd_simple_ops_t *ops,
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void *private_data,
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snd_seq_kinstr_ops_t *next);
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#endif
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#endif /* __SOUND_AINSTR_SIMPLE_H */
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