mixer_oss.h

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#ifndef __SOUND_MIXER_OSS_H
#define __SOUND_MIXER_OSS_H

/*
 *  OSS MIXER API
 *  Copyright (c) by Jaroslav Kysela <[email protected]>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)

#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 */