root/sound/core/seq/oss/seq_oss_device.h

INCLUDED FROM

DEFINITIONS

1. snd_seq_oss_dispatch
2. snd_seq_oss_control
3. snd_seq_oss_fill_addr

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * OSS compatible sequencer driver
   4  *
   5  * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
   6  */
   7 
   8 #ifndef __SEQ_OSS_DEVICE_H
   9 #define __SEQ_OSS_DEVICE_H
  10 
  11 #include <linux/time.h>
  12 #include <linux/wait.h>
  13 #include <linux/slab.h>
  14 #include <linux/sched/signal.h>
  15 #include <sound/core.h>
  16 #include <sound/seq_oss.h>
  17 #include <sound/rawmidi.h>
  18 #include <sound/seq_kernel.h>
  19 #include <sound/info.h>
  20 #include "../seq_clientmgr.h"
  21 
  22 /* max. applications */
  23 #define SNDRV_SEQ_OSS_MAX_CLIENTS       16
  24 #define SNDRV_SEQ_OSS_MAX_SYNTH_DEVS    16
  25 #define SNDRV_SEQ_OSS_MAX_MIDI_DEVS     32
  26 
  27 /* version */
  28 #define SNDRV_SEQ_OSS_MAJOR_VERSION     0
  29 #define SNDRV_SEQ_OSS_MINOR_VERSION     1
  30 #define SNDRV_SEQ_OSS_TINY_VERSION      8
  31 #define SNDRV_SEQ_OSS_VERSION_STR       "0.1.8"
  32 
  33 /* device and proc interface name */
  34 #define SNDRV_SEQ_OSS_PROCNAME          "oss"
  35 
  36 
  37 /*
  38  * type definitions
  39  */
  40 
  41 typedef unsigned int reltime_t;
  42 typedef unsigned int abstime_t;
  43 
  44 
  45 /*
  46  * synthesizer channel information
  47  */
  48 struct seq_oss_chinfo {
  49         int note, vel;
  50 };
  51 
  52 /*
  53  * synthesizer information
  54  */
  55 struct seq_oss_synthinfo {
  56         struct snd_seq_oss_arg arg;
  57         struct seq_oss_chinfo *ch;
  58         struct seq_oss_synth_sysex *sysex;
  59         int nr_voices;
  60         int opened;
  61         int is_midi;
  62         int midi_mapped;
  63 };
  64 
  65 
  66 /*
  67  * sequencer client information
  68  */
  69 
  70 struct seq_oss_devinfo {
  71 
  72         int index;      /* application index */
  73         int cseq;       /* sequencer client number */
  74         int port;       /* sequencer port number */
  75         int queue;      /* sequencer queue number */
  76 
  77         struct snd_seq_addr addr;       /* address of this device */
  78 
  79         int seq_mode;   /* sequencer mode */
  80         int file_mode;  /* file access */
  81 
  82         /* midi device table */
  83         int max_mididev;
  84 
  85         /* synth device table */
  86         int max_synthdev;
  87         struct seq_oss_synthinfo synths[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
  88         int synth_opened;
  89 
  90         /* output queue */
  91         struct seq_oss_writeq *writeq;
  92 
  93         /* midi input queue */
  94         struct seq_oss_readq *readq;
  95 
  96         /* timer */
  97         struct seq_oss_timer *timer;
  98 };
  99 
 100 
 101 /*
 102  * function prototypes
 103  */
 104 
 105 /* create/delete OSS sequencer client */
 106 int snd_seq_oss_create_client(void);
 107 int snd_seq_oss_delete_client(void);
 108 
 109 /* device file interface */
 110 int snd_seq_oss_open(struct file *file, int level);
 111 void snd_seq_oss_release(struct seq_oss_devinfo *dp);
 112 int snd_seq_oss_ioctl(struct seq_oss_devinfo *dp, unsigned int cmd, unsigned long arg);
 113 int snd_seq_oss_read(struct seq_oss_devinfo *dev, char __user *buf, int count);
 114 int snd_seq_oss_write(struct seq_oss_devinfo *dp, const char __user *buf, int count, struct file *opt);
 115 __poll_t snd_seq_oss_poll(struct seq_oss_devinfo *dp, struct file *file, poll_table * wait);
 116 
 117 void snd_seq_oss_reset(struct seq_oss_devinfo *dp);
 118 
 119 /* */
 120 void snd_seq_oss_process_queue(struct seq_oss_devinfo *dp, abstime_t time);
 121 
 122 
 123 /* proc interface */
 124 void snd_seq_oss_system_info_read(struct snd_info_buffer *buf);
 125 void snd_seq_oss_midi_info_read(struct snd_info_buffer *buf);
 126 void snd_seq_oss_synth_info_read(struct snd_info_buffer *buf);
 127 void snd_seq_oss_readq_info_read(struct seq_oss_readq *q, struct snd_info_buffer *buf);
 128 
 129 /* file mode macros */
 130 #define is_read_mode(mode)      ((mode) & SNDRV_SEQ_OSS_FILE_READ)
 131 #define is_write_mode(mode)     ((mode) & SNDRV_SEQ_OSS_FILE_WRITE)
 132 #define is_nonblock_mode(mode)  ((mode) & SNDRV_SEQ_OSS_FILE_NONBLOCK)
 133 
 134 /* dispatch event */
 135 static inline int
 136 snd_seq_oss_dispatch(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int atomic, int hop)
 137 {
 138         return snd_seq_kernel_client_dispatch(dp->cseq, ev, atomic, hop);
 139 }
 140 
 141 /* ioctl for writeq */
 142 static inline int
 143 snd_seq_oss_control(struct seq_oss_devinfo *dp, unsigned int type, void *arg)
 144 {
 145         int err;
 146 
 147         snd_seq_client_ioctl_lock(dp->cseq);
 148         err = snd_seq_kernel_client_ctl(dp->cseq, type, arg);
 149         snd_seq_client_ioctl_unlock(dp->cseq);
 150         return err;
 151 }
 152 
 153 /* fill the addresses in header */
 154 static inline void
 155 snd_seq_oss_fill_addr(struct seq_oss_devinfo *dp, struct snd_seq_event *ev,
 156                      int dest_client, int dest_port)
 157 {
 158         ev->queue = dp->queue;
 159         ev->source = dp->addr;
 160         ev->dest.client = dest_client;
 161         ev->dest.port = dest_port;
 162 }
 163 
 164 
 165 /* misc. functions for proc interface */
 166 char *enabled_str(int bool);
 167 
 168 #endif /* __SEQ_OSS_DEVICE_H */