LXR linux/include/sound/mixer

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2#ifndef __SOUND_MIXER_OSS_H
   3#define __SOUND_MIXER_OSS_H
   4
   5/*
   6 *  OSS MIXER API
   7 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   8 */
   9
  10#if IS_ENABLED(CONFIG_SND_MIXER_OSS)
  11
  12#define SNDRV_OSS_MAX_MIXERS    32
  13
  14struct snd_mixer_oss_file;
  15
  16struct snd_mixer_oss_slot {
  17        int number;
  18        unsigned int stereo: 1;
  19        int (*get_volume)(struct snd_mixer_oss_file *fmixer,
  20                          struct snd_mixer_oss_slot *chn,
  21                          int *left, int *right);
  22        int (*put_volume)(struct snd_mixer_oss_file *fmixer,
  23                          struct snd_mixer_oss_slot *chn,
  24                          int left, int right);
  25        int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
  26                          struct snd_mixer_oss_slot *chn,
  27                          int *active);
  28        int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
  29                          struct snd_mixer_oss_slot *chn,
  30                          int active);
  31        unsigned long private_value;
  32        void *private_data;
  33        void (*private_free)(struct snd_mixer_oss_slot *slot);
  34        int volume[2];
  35};
  36
  37struct snd_mixer_oss {
  38        struct snd_card *card;
  39        char id[16];
  40        char name[32];
  41        struct snd_mixer_oss_slot slots[SNDRV_OSS_MAX_MIXERS]; /* OSS mixer slots */
  42        unsigned int mask_recsrc;               /* exclusive recsrc mask */
  43        int (*get_recsrc)(struct snd_mixer_oss_file *fmixer,
  44                          unsigned int *active_index);
  45        int (*put_recsrc)(struct snd_mixer_oss_file *fmixer,
  46                          unsigned int active_index);
  47        void *private_data_recsrc;
  48        void (*private_free_recsrc)(struct snd_mixer_oss *mixer);
  49        struct mutex reg_mutex;
  50        struct snd_info_entry *proc_entry;
  51        int oss_dev_alloc;
  52        /* --- */
  53        int oss_recsrc;
  54};
  55
  56struct snd_mixer_oss_file {
  57        struct snd_card *card;
  58        struct snd_mixer_oss *mixer;
  59};
  60
  61int snd_mixer_oss_ioctl_card(struct snd_card *card,
  62                             unsigned int cmd, unsigned long arg);
  63
  64#endif /* CONFIG_SND_MIXER_OSS */
  65
  66#endif /* __SOUND_MIXER_OSS_H */
  67