ossp.h

   1 /*
   2  * ossp - OSS Proxy: emulate OSS device using CUSE
   3  *
   4  * Copyright (C) 2008-2010  SUSE Linux Products GmbH
   5  * Copyright (C) 2008-2010  Tejun Heo <tj@kernel.org>
   6  *
   7  * This file is released under the GPLv2.
   8  */
   9
  10 #ifndef _OSSP_H
  11 #define _OSSP_H
  12
  13 #include <sys/types.h>
  14 #include <inttypes.h>
  15 #include <semaphore.h>
  16 #include <sys/soundcard.h>
  17
  18 #define OSSP_VERSION            "1.3.2"
  19 #define OSSP_CMD_MAGIC          0xdeadbeef
  20 #define OSSP_REPLY_MAGIC        0xbeefdead
  21 #define OSSP_NOTIFY_MAGIC       0xbebebebe
  22
  23 #define PLAY                    0
  24 #define REC                     1
  25 #define LEFT                    0
  26 #define RIGHT                   1
  27
  28 enum ossp_opcode {
  29         OSSP_MIXER,
  30
  31         OSSP_DSP_OPEN,
  32         OSSP_DSP_READ,
  33         OSSP_DSP_WRITE,
  34         OSSP_DSP_POLL,
  35         OSSP_DSP_MMAP,
  36         OSSP_DSP_MUNMAP,
  37
  38         OSSP_DSP_RESET,
  39         OSSP_DSP_SYNC,
  40         OSSP_DSP_POST,
  41
  42         OSSP_DSP_GET_RATE,
  43         OSSP_DSP_GET_CHANNELS,
  44         OSSP_DSP_GET_FORMAT,
  45         OSSP_DSP_GET_BLKSIZE,
  46         OSSP_DSP_GET_FORMATS,
  47         OSSP_DSP_SET_RATE,
  48         OSSP_DSP_SET_CHANNELS,
  49         OSSP_DSP_SET_FORMAT,
  50         OSSP_DSP_SET_SUBDIVISION,
  51
  52         OSSP_DSP_SET_FRAGMENT,
  53         OSSP_DSP_GET_TRIGGER,
  54         OSSP_DSP_SET_TRIGGER,
  55         OSSP_DSP_GET_OSPACE,
  56         OSSP_DSP_GET_ISPACE,
  57         OSSP_DSP_GET_OPTR,
  58         OSSP_DSP_GET_IPTR,
  59         OSSP_DSP_GET_ODELAY,
  60
  61         OSSP_NR_OPCODES,
  62 };
  63
  64 enum ossp_notify_opcode {
  65         OSSP_NOTIFY_POLL,
  66         OSSP_NOTIFY_OBITUARY,
  67         OSSP_NOTIFY_VOLCHG,
  68         OSSP_NOTIFY_FILL,
  69         OSSP_NOTIFY_STORE,
  70
  71         OSSP_NR_NOTIFY_OPCODES,
  72 };
  73
  74 struct ossp_transfer {
  75         sem_t sem;
  76         size_t pos;
  77         size_t bytes;
  78 };
  79
  80 struct ossp_mixer_arg {
  81         int                     vol[2][2];
  82 };
  83
  84 struct ossp_dsp_open_arg {
  85         int                     flags;
  86         pid_t                   opener_pid;
  87 };
  88
  89 struct ossp_dsp_rw_arg {
  90         unsigned                nonblock:1;
  91 };
  92
  93 struct ossp_dsp_mmap_arg {
  94         int                     dir;
  95         size_t                  size;
  96 };
  97
  98 struct ossp_cmd {
  99         unsigned                magic;
 100         enum ossp_opcode        opcode;
 101         size_t                  din_size;
 102         size_t                  dout_size;
 103 };
 104
 105 struct ossp_reply {
 106         unsigned                magic;
 107         int                     result;
 108         size_t                  dout_size;      /* <= cmd.data_in_size */
 109 };
 110
 111 struct ossp_notify {
 112         unsigned                magic;
 113         enum ossp_notify_opcode opcode;
 114 };
 115
 116 struct ossp_arg_size {
 117         ssize_t                 carg_size;
 118         ssize_t                 rarg_size;
 119         unsigned                has_fd:1;
 120 };
 121
 122 extern const struct ossp_arg_size ossp_arg_sizes[OSSP_NR_OPCODES];
 123 extern const char *ossp_cmd_str[OSSP_NR_OPCODES];
 124 extern const char *ossp_notify_str[OSSP_NR_NOTIFY_OPCODES];
 125
 126 #endif /* _OSSP_H */