linux/sound/synth/emux/emux_oss.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Interface for OSS sequencer emulation
 *
 *  Copyright (C) 1999 Takashi Iwai <[email protected]>
 *
 * Changes
 * 19990227   Steve Ratcliffe   Made separate file and merged in latest
 * 				midi emulation.
 */


#include <linux/export.h>
#include <linux/uaccess.h>
#include <sound/core.h>
#include "emux_voice.h"
#include <sound/asoundef.h>

static int snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure);
static int snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg);
static int snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd,
				  unsigned long ioarg);
static int snd_emux_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
				       const char __user *buf, int offs, int count);
static int snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg);
static int snd_emux_event_oss_input(struct snd_seq_event *ev, int direct,
				    void *private, int atomic, int hop);
static void reset_port_mode(struct snd_emux_port *port, int midi_mode);
static void emuspec_control(struct snd_emux *emu, struct snd_emux_port *port,
			    int cmd, unsigned char *event, int atomic, int hop);
static void gusspec_control(struct snd_emux *emu, struct snd_emux_port *port,
			    int cmd, unsigned char *event, int atomic, int hop);
static void fake_event(struct snd_emux *emu, struct snd_emux_port *port,
		       int ch, int param, int val, int atomic, int hop);

/* operators */
static const struct snd_seq_oss_callback oss_callback = …;


/*
 * register OSS synth
 */

void
snd_emux_init_seq_oss(struct snd_emux *emu)
{ … }


/*
 * unregister
 */
void
snd_emux_detach_seq_oss(struct snd_emux *emu)
{ … }


/* use port number as a unique soundfont client number */
#define SF_CLIENT_NO(p) …

/*
 * open port for OSS sequencer
 */
static int
snd_emux_open_seq_oss(struct snd_seq_oss_arg *arg, void *closure)
{ … }


#define DEFAULT_DRUM_FLAGS …

/*
 * reset port mode
 */
static void
reset_port_mode(struct snd_emux_port *port, int midi_mode)
{ … }


/*
 * close port
 */
static int
snd_emux_close_seq_oss(struct snd_seq_oss_arg *arg)
{ … }


/*
 * load patch
 */
static int
snd_emux_load_patch_seq_oss(struct snd_seq_oss_arg *arg, int format,
			    const char __user *buf, int offs, int count)
{ … }


/*
 * ioctl
 */
static int
snd_emux_ioctl_seq_oss(struct snd_seq_oss_arg *arg, unsigned int cmd, unsigned long ioarg)
{ … }


/*
 * reset device
 */
static int
snd_emux_reset_seq_oss(struct snd_seq_oss_arg *arg)
{ … }


/*
 * receive raw events: only SEQ_PRIVATE is accepted.
 */
static int
snd_emux_event_oss_input(struct snd_seq_event *ev, int direct, void *private_data,
			 int atomic, int hop)
{ … }


/*
 * OSS/AWE driver specific h/w controls
 */
static void
emuspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
		unsigned char *event, int atomic, int hop)
{ … }

/*
 * GUS specific h/w controls
 */

#include <linux/ultrasound.h>

static void
gusspec_control(struct snd_emux *emu, struct snd_emux_port *port, int cmd,
		unsigned char *event, int atomic, int hop)
{ … }


/*
 * send an event to midi emulation
 */
static void
fake_event(struct snd_emux *emu, struct snd_emux_port *port, int ch, int param, int val, int atomic, int hop)
{ … }