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Directory :  /usr/src/linux-headers-5.15.0-142-generic/include/sound/

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Current File : /usr/src/linux-headers-5.15.0-142-generic/include/sound/mixer_oss.h
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_MIXER_OSS_H
#define __SOUND_MIXER_OSS_H

/*
 *  OSS MIXER API
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 */

#if IS_ENABLED(CONFIG_SND_MIXER_OSS)

#define SNDRV_OSS_MAX_MIXERS	32

struct snd_mixer_oss_file;

struct snd_mixer_oss_slot {
	int number;
	unsigned int stereo: 1;
	int (*get_volume)(struct snd_mixer_oss_file *fmixer,
			  struct snd_mixer_oss_slot *chn,
			  int *left, int *right);
	int (*put_volume)(struct snd_mixer_oss_file *fmixer,
			  struct snd_mixer_oss_slot *chn,
			  int left, int right);
	int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
			  struct snd_mixer_oss_slot *chn,
			  int *active);
	int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
			  struct snd_mixer_oss_slot *chn,
			  int active);
	unsigned long private_value;
	void *private_data;
	void (*private_free)(struct snd_mixer_oss_slot *slot);
	int volume[2];
};

struct snd_mixer_oss {
	struct snd_card *card;
	char id[16];
	char name[32];
	struct snd_mixer_oss_slot slots[SNDRV_OSS_MAX_MIXERS]; /* OSS mixer slots */
	unsigned int mask_recsrc;		/* exclusive recsrc mask */
	int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
			  unsigned int *active_index);
	int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
			  unsigned int active_index);
	void *private_data_recsrc;
	void (*private_free_recsrc)(struct snd_mixer_oss *mixer);
	struct mutex reg_mutex;
	struct snd_info_entry *proc_entry;
	int oss_dev_alloc;
	/* --- */
	int oss_recsrc;
};

struct snd_mixer_oss_file {
	struct snd_card *card;
	struct snd_mixer_oss *mixer;
};

int snd_mixer_oss_ioctl_card(struct snd_card *card,
			     unsigned int cmd, unsigned long arg);

#endif /* CONFIG_SND_MIXER_OSS */

#endif /* __SOUND_MIXER_OSS_H */

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