84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef __SOUND_SEQ_OSS_H
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#define __SOUND_SEQ_OSS_H
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/*
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* OSS compatible sequencer driver
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*
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* Copyright (C) 1998,99 Takashi Iwai
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*/
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#include <sound/asequencer.h>
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#include <sound/seq_kernel.h>
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/*
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* argument structure for synthesizer operations
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*/
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struct snd_seq_oss_arg {
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/* given by OSS sequencer */
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int app_index; /* application unique index */
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int file_mode; /* file mode - see below */
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int seq_mode; /* sequencer mode - see below */
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/* following must be initialized in open callback */
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struct snd_seq_addr addr; /* opened port address */
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void *private_data; /* private data for lowlevel drivers */
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/* note-on event passing mode: initially given by OSS seq,
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* but configurable by drivers - see below
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*/
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int event_passing;
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};
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/*
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* synthesizer operation callbacks
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*/
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struct snd_seq_oss_callback {
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struct module *owner;
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int (*open)(struct snd_seq_oss_arg *p, void *closure);
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int (*close)(struct snd_seq_oss_arg *p);
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int (*ioctl)(struct snd_seq_oss_arg *p, unsigned int cmd, unsigned long arg);
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int (*load_patch)(struct snd_seq_oss_arg *p, int format, const char __user *buf, int offs, int count);
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int (*reset)(struct snd_seq_oss_arg *p);
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int (*raw_event)(struct snd_seq_oss_arg *p, unsigned char *data);
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};
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/* flag: file_mode */
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#define SNDRV_SEQ_OSS_FILE_ACMODE 3
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#define SNDRV_SEQ_OSS_FILE_READ 1
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#define SNDRV_SEQ_OSS_FILE_WRITE 2
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#define SNDRV_SEQ_OSS_FILE_NONBLOCK 4
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/* flag: seq_mode */
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#define SNDRV_SEQ_OSS_MODE_SYNTH 0
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#define SNDRV_SEQ_OSS_MODE_MUSIC 1
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/* flag: event_passing */
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#define SNDRV_SEQ_OSS_PROCESS_EVENTS 0 /* key == 255 is processed as velocity change */
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#define SNDRV_SEQ_OSS_PASS_EVENTS 1 /* pass all events to callback */
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#define SNDRV_SEQ_OSS_PROCESS_KEYPRESS 2 /* key >= 128 will be processed as key-pressure */
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/* default control rate: fixed */
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#define SNDRV_SEQ_OSS_CTRLRATE 100
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/* default max queue length: configurable by module option */
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#define SNDRV_SEQ_OSS_MAX_QLEN 1024
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/*
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* data pointer to snd_seq_register_device
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*/
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struct snd_seq_oss_reg {
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int type;
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int subtype;
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int nvoices;
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struct snd_seq_oss_callback oper;
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void *private_data;
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};
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/* device id */
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#define SNDRV_SEQ_DEV_ID_OSS "seq-oss"
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#endif /* __SOUND_SEQ_OSS_H */
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