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pcm_oss.h

#ifndef __SOUND_PCM_OSS_H
#define __SOUND_PCM_OSS_H

/*
 *  Digital Audio (PCM) - OSS compatibility abstract layer
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

struct snd_pcm_oss_setup {
      char *task_name;
      unsigned int disable:1,
                 direct:1,
                 block:1,
                 nonblock:1,
                 partialfrag:1,
                 nosilence:1,
                 buggyptr:1;
      unsigned int periods;
      unsigned int period_size;
      struct snd_pcm_oss_setup *next;
};

struct snd_pcm_oss_runtime {
      unsigned params: 1,                 /* format/parameter change */
             prepare: 1,                  /* need to prepare the operation */
             trigger: 1,                  /* trigger flag */
             sync_trigger: 1;       /* sync trigger flag */
      int rate;                     /* requested rate */
      int format;                   /* requested OSS format */
      unsigned int channels;              /* requested channels */
      unsigned int fragshift;
      unsigned int maxfrags;
      unsigned int subdivision;           /* requested subdivision */
      size_t period_bytes;                /* requested period size */
      size_t period_frames;               /* period frames for poll */
      size_t period_ptr;                  /* actual write pointer to period */
      unsigned int periods;
      size_t buffer_bytes;                /* requested buffer size */
      size_t bytes;                       /* total # bytes processed */
      size_t mmap_bytes;
      char *buffer;                       /* vmallocated period */
      size_t buffer_used;                 /* used length from period buffer */
      struct mutex params_lock;
#ifdef CONFIG_SND_PCM_OSS_PLUGINS
      struct snd_pcm_plugin *plugin_first;
      struct snd_pcm_plugin *plugin_last;
#endif
      unsigned int prev_hw_ptr_interrupt;
};

struct snd_pcm_oss_file {
      struct snd_pcm_substream *streams[2];
};

struct snd_pcm_oss_substream {
      unsigned oss: 1;              /* oss mode */
      struct snd_pcm_oss_setup setup;           /* active setup */
};

struct snd_pcm_oss_stream {
      struct snd_pcm_oss_setup *setup_list;     /* setup list */
      struct mutex setup_mutex;
#ifdef CONFIG_SND_VERBOSE_PROCFS
      struct snd_info_entry *proc_entry;
#endif
};

struct snd_pcm_oss {
      int reg;
      unsigned int reg_mask;
};

#endif /* __SOUND_PCM_OSS_H */

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