229 lines
6.6 KiB
C
229 lines
6.6 KiB
C
/*
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* Advanced Linux Sound Architecture
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*
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* GF1 (GUS) Patch Instrument Format
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* Copyright (c) 1994-99 by Jaroslav Kysela <perex@perex.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_GF1_H
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#define __SOUND_AINSTR_GF1_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 GF1_SHARE_FILE 0
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/*
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* wave formats
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*/
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#define GF1_WAVE_16BIT 0x0001 /* 16-bit wave */
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#define GF1_WAVE_UNSIGNED 0x0002 /* unsigned wave */
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#define GF1_WAVE_INVERT 0x0002 /* same as unsigned wave */
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#define GF1_WAVE_BACKWARD 0x0004 /* backward mode (maybe used for reverb or ping-ping loop) */
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#define GF1_WAVE_LOOP 0x0008 /* loop mode */
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#define GF1_WAVE_BIDIR 0x0010 /* bidirectional mode */
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#define GF1_WAVE_STEREO 0x0100 /* stereo mode */
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#define GF1_WAVE_ULAW 0x0200 /* uLaw compression mode */
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/*
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* Wavetable definitions
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*/
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struct gf1_wave {
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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; /* bits loop start offset in samples * 16 (lowest 4 bits - fraction) */
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unsigned int loop_end; /* loop start 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 flags; /* GF1 patch flags */
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unsigned char pad;
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unsigned int sample_rate; /* sample rate in Hz */
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unsigned int low_frequency; /* low frequency range */
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unsigned int high_frequency; /* high frequency range */
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unsigned int root_frequency; /* root frequency range */
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signed short tune;
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unsigned char balance;
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unsigned char envelope_rate[6];
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unsigned char envelope_offset[6];
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unsigned char tremolo_sweep;
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unsigned char tremolo_rate;
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unsigned char tremolo_depth;
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unsigned char vibrato_sweep;
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unsigned char vibrato_rate;
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unsigned char vibrato_depth;
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unsigned short scale_frequency;
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unsigned short scale_factor; /* 0-2048 or 0-2 */
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struct gf1_wave *next;
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};
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/*
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* Instrument
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*/
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#define IWFFFF_EXCLUDE_NONE 0x0000 /* exclusion mode - none */
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#define IWFFFF_EXCLUDE_SINGLE 0x0001 /* exclude single - single note from the instrument group */
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#define IWFFFF_EXCLUDE_MULTIPLE 0x0002 /* exclude multiple - stop only same note from this instrument */
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#define IWFFFF_EFFECT_NONE 0
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#define IWFFFF_EFFECT_REVERB 1
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#define IWFFFF_EFFECT_CHORUS 2
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#define IWFFFF_EFFECT_ECHO 3
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struct gf1_instrument {
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unsigned short exclusion;
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unsigned short exclusion_group; /* 0 - none, 1-65535 */
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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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struct gf1_wave *wave; /* first waveform */
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};
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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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* gf1_xinstrument IWFFFF_STRU_INSTR
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* +gf1_xwave IWFFFF_STRU_WAVE
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*
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*/
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#define GF1_STRU_WAVE __cpu_to_be32(('W'<<24)|('A'<<16)|('V'<<8)|'E')
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#define GF1_STRU_INSTR __cpu_to_be32(('I'<<24)|('N'<<16)|('S'<<8)|'T')
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/*
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* Wavetable definitions
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*/
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struct gf1_xwave {
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__u32 stype; /* structure type */
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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 flags; /* GF1 patch flags */
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__u8 pad;
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__u32 sample_rate; /* sample rate in Hz */
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__u32 low_frequency; /* low frequency range */
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__u32 high_frequency; /* high frequency range */
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__u32 root_frequency; /* root frequency range */
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__s16 tune;
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__u8 balance;
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__u8 envelope_rate[6];
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__u8 envelope_offset[6];
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__u8 tremolo_sweep;
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__u8 tremolo_rate;
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__u8 tremolo_depth;
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__u8 vibrato_sweep;
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__u8 vibrato_rate;
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__u8 vibrato_depth;
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__u16 scale_frequency;
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__u16 scale_factor; /* 0-2048 or 0-2 */
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};
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/*
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* Instrument
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*/
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struct gf1_xinstrument {
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__u32 stype;
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__u16 exclusion;
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__u16 exclusion_group; /* 0 - none, 1-65535 */
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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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};
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/*
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* Instrument info
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*/
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#define GF1_INFO_ENVELOPE (1<<0)
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#define GF1_INFO_TREMOLO (1<<1)
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#define GF1_INFO_VIBRATO (1<<2)
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struct gf1_info {
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unsigned char flags; /* supported wave flags */
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unsigned char pad[3];
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unsigned int features; /* supported features */
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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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};
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#ifdef __KERNEL__
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#include "seq_instr.h"
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struct snd_gf1_ops {
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void *private_data;
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int (*info)(void *private_data, struct gf1_info *info);
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int (*put_sample)(void *private_data, struct gf1_wave *wave,
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char __user *data, long len, int atomic);
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int (*get_sample)(void *private_data, struct gf1_wave *wave,
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char __user *data, long len, int atomic);
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int (*remove_sample)(void *private_data, struct gf1_wave *wave,
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int atomic);
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void (*notify)(void *private_data, struct snd_seq_kinstr *instr, int what);
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struct snd_seq_kinstr_ops kops;
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};
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int snd_seq_gf1_init(struct snd_gf1_ops *ops,
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void *private_data,
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struct snd_seq_kinstr_ops *next);
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#endif
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/* typedefs for compatibility to user-space */
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typedef struct gf1_xwave gf1_xwave_t;
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typedef struct gf1_xinstrument gf1_xinstrument_t;
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#endif /* __SOUND_AINSTR_GF1_H */
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