linux/sound/core/oss/io.c

/*
 *  PCM I/O Plug-In Interface
 *  Copyright (c) 1999 by Jaroslav Kysela <[email protected]>
 *
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library 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 Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */
  
#include <linux/time.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "pcm_plugin.h"

#define pcm_write(plug,buf,count) …
#define pcm_writev(plug,vec,count) …
#define pcm_read(plug,buf,count) …
#define pcm_readv(plug,vec,count) …

/*
 *  Basic io plugin
 */
 
static snd_pcm_sframes_t io_playback_transfer(struct snd_pcm_plugin *plugin,
				    const struct snd_pcm_plugin_channel *src_channels,
				    struct snd_pcm_plugin_channel *dst_channels,
				    snd_pcm_uframes_t frames)
{ … }
 
static snd_pcm_sframes_t io_capture_transfer(struct snd_pcm_plugin *plugin,
				   const struct snd_pcm_plugin_channel *src_channels,
				   struct snd_pcm_plugin_channel *dst_channels,
				   snd_pcm_uframes_t frames)
{ … }
 
static snd_pcm_sframes_t io_src_channels(struct snd_pcm_plugin *plugin,
			     snd_pcm_uframes_t frames,
			     struct snd_pcm_plugin_channel **channels)
{ … }

int snd_pcm_plugin_build_io(struct snd_pcm_substream *plug,
			    struct snd_pcm_hw_params *params,
			    struct snd_pcm_plugin **r_plugin)
{ … }