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#ifndef __PCM_PLUGIN_H
#define __PCM_PLUGIN_H
/*
* Digital Audio (Plugin interface) abstract layer
* Copyright (c) by Jaroslav Kysela <perex@suse.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
*
*/
#ifndef ATTRIBUTE_UNUSED
#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif
typedef unsigned int bitset_t;
static inline size_t bitset_size(int nbits)
{
return (nbits + sizeof(bitset_t) * 8 - 1) / (sizeof(bitset_t) * 8);
}
static inline bitset_t *bitset_alloc(int nbits)
{
return kcalloc(bitset_size(nbits), sizeof(bitset_t), GFP_KERNEL);
}
static inline void bitset_set(bitset_t *bitmap, unsigned int pos)
{
size_t bits = sizeof(*bitmap) * 8;
bitmap[pos / bits] |= 1 << (pos % bits);
}
static inline void bitset_reset(bitset_t *bitmap, unsigned int pos)
{
size_t bits = sizeof(*bitmap) * 8;
bitmap[pos / bits] &= ~(1 << (pos % bits));
}
static inline int bitset_get(bitset_t *bitmap, unsigned int pos)
{
size_t bits = sizeof(*bitmap) * 8;
return !!(bitmap[pos / bits] & (1 << (pos % bits)));
}
static inline void bitset_copy(bitset_t *dst, bitset_t *src, unsigned int nbits)
{
memcpy(dst, src, bitset_size(nbits) * sizeof(bitset_t));
}
static inline void bitset_and(bitset_t *dst, bitset_t *bs, unsigned int nbits)
{
bitset_t *end = dst + bitset_size(nbits);
while (dst < end)
*dst++ &= *bs++;
}
static inline void bitset_or(bitset_t *dst, bitset_t *bs, unsigned int nbits)
{
bitset_t *end = dst + bitset_size(nbits);
while (dst < end)
*dst++ |= *bs++;
}
static inline void bitset_zero(bitset_t *dst, unsigned int nbits)
{
bitset_t *end = dst + bitset_size(nbits);
while (dst < end)
*dst++ = 0;
}
static inline void bitset_one(bitset_t *dst, unsigned int nbits)
{
bitset_t *end = dst + bitset_size(nbits);
while (dst < end)
*dst++ = ~(bitset_t)0;
}
#define snd_pcm_plug_t snd_pcm_substream_t
#define snd_pcm_plug_stream(plug) ((plug)->stream)
typedef enum {
INIT = 0,
PREPARE = 1,
} snd_pcm_plugin_action_t;
typedef struct _snd_pcm_channel_area {
void *addr; /* base address of channel samples */
unsigned int first; /* offset to first sample in bits */
unsigned int step; /* samples distance in bits */
} snd_pcm_channel_area_t;
typedef struct _snd_pcm_plugin_channel {
void *aptr; /* pointer to the allocated area */
snd_pcm_channel_area_t area;
snd_pcm_uframes_t frames; /* allocated frames */
unsigned int enabled:1; /* channel need to be processed */
unsigned int wanted:1; /* channel is wanted */
} snd_pcm_plugin_channel_t;
typedef struct _snd_pcm_plugin_format {
int format;
unsigned int rate;
unsigned int channels;
} snd_pcm_plugin_format_t;
struct _snd_pcm_plugin {
const char *name; /* plug-in name */
int stream;
snd_pcm_plugin_format_t src_format; /* source format */
snd_pcm_plugin_format_t dst_format; /* destination format */
int src_width; /* sample width in bits */
int dst_width; /* sample width in bits */
int access;
snd_pcm_sframes_t (*src_frames)(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t dst_frames);
snd_pcm_sframes_t (*dst_frames)(snd_pcm_plugin_t *plugin, snd_pcm_uframes_t src_frames);
snd_pcm_sframes_t (*client_channels)(snd_pcm_plugin_t *plugin,
snd_pcm_uframes_t frames,
snd_pcm_plugin_channel_t **channels);
int (*src_channels_mask)(snd_pcm_plugin_t *plugin,
bitset_t *dst_vmask,
bitset_t **src_vmask);
int (*dst_channels_mask)(snd_pcm_plugin_t *plugin,
bitset_t *src_vmask,
bitset_t **dst_vmask);
snd_pcm_sframes_t (*transfer)(snd_pcm_plugin_t *plugin,
const snd_pcm_plugin_channel_t *src_channels,
snd_pcm_plugin_channel_t *dst_channels,
snd_pcm_uframes_t frames);
int (*action)(snd_pcm_plugin_t *plugin,
snd_pcm_plugin_action_t action,
unsigned long data);
snd_pcm_plugin_t *prev;
snd_pcm_plugin_t *next;
snd_pcm_plug_t *plug;
void *private_data;
void (*private_free)(snd_pcm_plugin_t *plugin);
char *buf;
snd_pcm_uframes_t buf_frames;
snd_pcm_plugin_channel_t *buf_channels;
bitset_t *src_vmask;
bitset_t *dst_vmask;
char extra_data[0];
};
int snd_pcm_plugin_build(snd_pcm_plug_t *handle,
const char *name,
snd_pcm_plugin_format_t *src_format,
snd_pcm_plugin_format_t *dst_format,
size_t extra,
snd_pcm_plugin_t **ret);
int snd_pcm_plugin_free(snd_pcm_plugin_t *plugin);
int snd_pcm_plugin_clear(snd_pcm_plugin_t **first);
int snd_pcm_plug_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_plug_client_size(snd_pcm_plug_t *handle, snd_pcm_uframes_t drv_size);
snd_pcm_sframes_t snd_pcm_plug_slave_size(snd_pcm_plug_t *handle, snd_pcm_uframes_t clt_size);
#define FULL ROUTE_PLUGIN_RESOLUTION
#define HALF ROUTE_PLUGIN_RESOLUTION / 2
typedef int route_ttable_entry_t;
int snd_pcm_plugin_build_io(snd_pcm_plug_t *handle,
snd_pcm_hw_params_t *params,
snd_pcm_plugin_t **r_plugin);
int snd_pcm_plugin_build_linear(snd_pcm_plug_t *handle,
snd_pcm_plugin_format_t *src_format,
snd_pcm_plugin_format_t *dst_format,
snd_pcm_plugin_t **r_plugin);
int snd_pcm_plugin_build_mulaw(snd_pcm_plug_t *handle,
snd_pcm_plugin_format_t *src_format,
snd_pcm_plugin_format_t *dst_format,
snd_pcm_plugin_t **r_plugin);
int snd_pcm_plugin_build_rate(snd_pcm_plug_t *handle,
snd_pcm_plugin_format_t *src_format,
snd_pcm_plugin_format_t *dst_format,
snd_pcm_plugin_t **r_plugin);
int snd_pcm_plugin_build_route(snd_pcm_plug_t *handle,
snd_pcm_plugin_format_t *src_format,
snd_pcm_plugin_format_t *dst_format,
route_ttable_entry_t *ttable,
snd_pcm_plugin_t **r_plugin);
int snd_pcm_plugin_build_copy(snd_pcm_plug_t *handle,
snd_pcm_plugin_format_t *src_format,
snd_pcm_plugin_format_t *dst_format,
snd_pcm_plugin_t **r_plugin);
int snd_pcm_plug_format_plugins(snd_pcm_plug_t *substream,
snd_pcm_hw_params_t *params,
snd_pcm_hw_params_t *slave_params);
int snd_pcm_plug_slave_format(int format, snd_mask_t *format_mask);
int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin);
snd_pcm_sframes_t snd_pcm_plug_write_transfer(snd_pcm_plug_t *handle, snd_pcm_plugin_channel_t *src_channels, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plug_read_transfer(snd_pcm_plug_t *handle, snd_pcm_plugin_channel_t *dst_channels_final, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(snd_pcm_plug_t *handle,
char *buf, snd_pcm_uframes_t count,
snd_pcm_plugin_channel_t **channels);
snd_pcm_sframes_t snd_pcm_plugin_client_channels(snd_pcm_plugin_t *plugin,
snd_pcm_uframes_t frames,
snd_pcm_plugin_channel_t **channels);
int snd_pcm_area_silence(const snd_pcm_channel_area_t *dst_channel, size_t dst_offset,
size_t samples, int format);
int snd_pcm_area_copy(const snd_pcm_channel_area_t *src_channel, size_t src_offset,
const snd_pcm_channel_area_t *dst_channel, size_t dst_offset,
size_t samples, int format);
void *snd_pcm_plug_buf_alloc(snd_pcm_plug_t *plug, snd_pcm_uframes_t size);
void snd_pcm_plug_buf_unlock(snd_pcm_plug_t *plug, void *ptr);
snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t size, int in_kernel);
snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t size, int in_kernel);
snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel);
snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel);
#define ROUTE_PLUGIN_RESOLUTION 16
int getput_index(int format);
int copy_index(int format);
int conv_index(int src_format, int dst_format);
void zero_channel(snd_pcm_plugin_t *plugin,
const snd_pcm_plugin_channel_t *dst_channel,
size_t samples);
#ifdef PLUGIN_DEBUG
#define pdprintf( fmt, args... ) printk( "plugin: " fmt, ##args)
#else
#define pdprintf( fmt, args... )
#endif
#endif /* __PCM_PLUGIN_H */
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