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@suse.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 typedef struct _snd_pcm_plugin snd_pcm_plugin_t;
  26 typedef struct _snd_pcm_oss_setup snd_pcm_oss_setup_t;
  27
  28 struct _snd_pcm_oss_setup {
  29         char *task_name;
  30         unsigned int disable:1,
  31                      direct:1,
  32                      block:1,
  33                      nonblock:1,
  34                      partialfrag:1,
  35                      nosilence:1;
  36         unsigned int periods;
  37         unsigned int period_size;
  38         snd_pcm_oss_setup_t *next;
  39 };
  40
  41 typedef struct _snd_pcm_oss_runtime {
  42         unsigned params: 1,                     /* format/parameter change */
  43                  prepare: 1,                    /* need to prepare the operation */
  44                  trigger: 1,                    /* trigger flag */
  45                  sync_trigger: 1;               /* sync trigger flag */
  46         int rate;                               /* requested rate */
  47         int format;                             /* requested OSS format */
  48         unsigned int channels;                  /* requested channels */
  49         unsigned int fragshift;
  50         unsigned int maxfrags;
  51         unsigned int subdivision;               /* requested subdivision */
  52         size_t period_bytes;                    /* requested period size */
  53         size_t period_frames;                   /* period frames for poll */
  54         size_t period_ptr;                      /* actual write pointer to period */
  55         unsigned int periods;
  56         size_t buffer_bytes;                    /* requested buffer size */
  57         size_t bytes;                           /* total # bytes processed */
  58         size_t mmap_bytes;
  59         char *buffer;                           /* vmallocated period */
  60         size_t buffer_used;                     /* used length from period buffer */
  61         snd_pcm_plugin_t *plugin_first;
  62         snd_pcm_plugin_t *plugin_last;
  63         unsigned int prev_hw_ptr_interrupt;
  64 } snd_pcm_oss_runtime_t;
  65
  66 typedef struct _snd_pcm_oss_file {
  67         snd_pcm_substream_t *streams[2];
  68 } snd_pcm_oss_file_t;
  69
  70 typedef struct _snd_pcm_oss_substream {
  71         unsigned oss: 1;                        /* oss mode */
  72         snd_pcm_oss_setup_t *setup;             /* active setup */
  73         snd_pcm_oss_file_t *file;
  74 } snd_pcm_oss_substream_t;
  75
  76 typedef struct _snd_pcm_oss_stream {
  77         snd_pcm_oss_setup_t *setup_list;        /* setup list */
  78         struct semaphore setup_mutex;
  79         snd_info_entry_t *proc_entry;
  80 } snd_pcm_oss_stream_t;
  81
  82 typedef struct _snd_pcm_oss {
  83         int reg;
  84         unsigned int reg_mask;
  85 } snd_pcm_oss_t;
  86
  87 #endif /* __SOUND_PCM_OSS_H */