include/sound/pcm_oss.h

   1 #ifndef __SOUND_PCM_OSS_H
   2 #define __SOUND_PCM_OSS_H
   3
   4 /*
   5  *  Digital Audio (PCM) - OSS compatibility abstract layer
   6  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   7  *
   8  *
   9  *   This program is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License as published by
  11  *   the Free Software Foundation; either version 2 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 struct snd_pcm_oss_setup {
  26         char *task_name;
  27         unsigned int disable:1,
  28                      direct:1,
  29                      block:1,
  30                      nonblock:1,
  31                      partialfrag:1,
  32                      nosilence:1,
  33                      buggyptr:1;
  34         unsigned int periods;
  35         unsigned int period_size;
  36         struct snd_pcm_oss_setup *next;
  37 };
  38
  39 struct snd_pcm_oss_runtime {
  40         unsigned params: 1,                     /* format/parameter change */
  41                  prepare: 1,                    /* need to prepare the operation */
  42                  trigger: 1,                    /* trigger flag */
  43                  sync_trigger: 1;               /* sync trigger flag */
  44         int rate;                               /* requested rate */
  45         int format;                             /* requested OSS format */
  46         unsigned int channels;                  /* requested channels */
  47         unsigned int fragshift;
  48         unsigned int maxfrags;
  49         unsigned int subdivision;               /* requested subdivision */
  50         size_t period_bytes;                    /* requested period size */
  51         size_t period_frames;                   /* period frames for poll */
  52         size_t period_ptr;                      /* actual write pointer to period */
  53         unsigned int periods;
  54         size_t buffer_bytes;                    /* requested buffer size */
  55         size_t bytes;                           /* total # bytes processed */
  56         size_t mmap_bytes;
  57         char *buffer;                           /* vmallocated period */
  58         size_t buffer_used;                     /* used length from period buffer */
  59         struct mutex params_lock;
  60         atomic_t rw_ref;                /* concurrent read/write accesses */
  61 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
  62         struct snd_pcm_plugin *plugin_first;
  63         struct snd_pcm_plugin *plugin_last;
  64 #endif
  65         unsigned int prev_hw_ptr_period;
  66 };
  67
  68 struct snd_pcm_oss_file {
  69         struct snd_pcm_substream *streams[2];
  70 };
  71
  72 struct snd_pcm_oss_substream {
  73         unsigned oss: 1;                        /* oss mode */
  74         struct snd_pcm_oss_setup setup;         /* active setup */
  75 };
  76
  77 struct snd_pcm_oss_stream {
  78         struct snd_pcm_oss_setup *setup_list;   /* setup list */
  79         struct mutex setup_mutex;
  80 #ifdef CONFIG_SND_VERBOSE_PROCFS
  81         struct snd_info_entry *proc_entry;
  82 #endif
  83 };
  84
  85 struct snd_pcm_oss {
  86         int reg;
  87         unsigned int reg_mask;
  88 };
  89
  90 #endif /* __SOUND_PCM_OSS_H */