/* 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 <perex@perex.cz>
 */

#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 */