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 
14 struct snd_mixer_oss_file;
15 
16 struct 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 
37 struct 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 
56 struct snd_mixer_oss_file {
57 	struct snd_card *card;
58 	struct snd_mixer_oss *mixer;
59 };
60 
61 int 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