xref: /linux/include/sound/seq_oss.h (revision 75bf465f0bc33e9b776a46d6a1b9b990f5fb7c37)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef __SOUND_SEQ_OSS_H
3 #define __SOUND_SEQ_OSS_H
4 
5 /*
6  * OSS compatible sequencer driver
7  *
8  * Copyright (C) 1998,99 Takashi Iwai
9  */
10 
11 #include <sound/asequencer.h>
12 #include <sound/seq_kernel.h>
13 
14 /*
15  * argument structure for synthesizer operations
16  */
17 struct snd_seq_oss_arg {
18 	/* given by OSS sequencer */
19 	int app_index;	/* application unique index */
20 	int file_mode;	/* file mode - see below */
21 	int seq_mode;	/* sequencer mode - see below */
22 
23 	/* following must be initialized in open callback */
24 	struct snd_seq_addr addr;	/* opened port address */
25 	void *private_data;	/* private data for lowlevel drivers */
26 
27 	/* note-on event passing mode: initially given by OSS seq,
28 	 * but configurable by drivers - see below
29 	 */
30 	int event_passing;
31 };
32 
33 
34 /*
35  * synthesizer operation callbacks
36  */
37 struct snd_seq_oss_callback {
38 	struct module *owner;
39 	int (*open)(struct snd_seq_oss_arg *p, void *closure);
40 	int (*close)(struct snd_seq_oss_arg *p);
41 	int (*ioctl)(struct snd_seq_oss_arg *p, unsigned int cmd, unsigned long arg);
42 	int (*load_patch)(struct snd_seq_oss_arg *p, int format, const char __user *buf, int offs, int count);
43 	int (*reset)(struct snd_seq_oss_arg *p);
44 	int (*raw_event)(struct snd_seq_oss_arg *p, unsigned char *data);
45 };
46 
47 /* flag: file_mode */
48 #define SNDRV_SEQ_OSS_FILE_ACMODE		3
49 #define SNDRV_SEQ_OSS_FILE_READ		1
50 #define SNDRV_SEQ_OSS_FILE_WRITE		2
51 #define SNDRV_SEQ_OSS_FILE_NONBLOCK	4
52 
53 /* flag: seq_mode */
54 #define SNDRV_SEQ_OSS_MODE_SYNTH		0
55 #define SNDRV_SEQ_OSS_MODE_MUSIC		1
56 
57 /* flag: event_passing */
58 #define SNDRV_SEQ_OSS_PROCESS_EVENTS	0	/* key == 255 is processed as velocity change */
59 #define SNDRV_SEQ_OSS_PASS_EVENTS		1	/* pass all events to callback */
60 #define SNDRV_SEQ_OSS_PROCESS_KEYPRESS	2	/* key >= 128 will be processed as key-pressure */
61 
62 /* default control rate: fixed */
63 #define SNDRV_SEQ_OSS_CTRLRATE		100
64 
65 /* default max queue length: configurable by module option */
66 #define SNDRV_SEQ_OSS_MAX_QLEN		1024
67 
68 
69 /*
70  * data pointer to snd_seq_register_device
71  */
72 struct snd_seq_oss_reg {
73 	int type;
74 	int subtype;
75 	int nvoices;
76 	struct snd_seq_oss_callback oper;
77 	void *private_data;
78 };
79 
80 /* device id */
81 #define SNDRV_SEQ_DEV_ID_OSS		"seq-oss"
82 
83 #endif /* __SOUND_SEQ_OSS_H */
84