Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#ifndef __PCM_PLUGIN_H

#define __PCM_PLUGIN_H

/*

 *  Digital Audio (Plugin interface) 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

 *

 */

#ifdef CONFIG_SND_PCM_OSS_PLUGINS

#define snd_pcm_plug_stream(plug) ((plug)->stream)

enum snd_pcm_plugin_action {

        INIT = 0,

        PREPARE = 1,

};

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 */

};

struct snd_pcm_plugin_channel {

        void *aptr;                     /* pointer to the allocated area */

        struct snd_pcm_channel_area area;

        snd_pcm_uframes_t frames;       /* allocated frames */

        unsigned int enabled:1;         /* channel need to be processed */

        unsigned int wanted:1;          /* channel is wanted */

};

struct snd_pcm_plugin_format {

        int format;

        unsigned int rate;

        unsigned int channels;

};

struct snd_pcm_plugin {

        const char *name;               /* plug-in name */

        int stream;

        struct snd_pcm_plugin_format src_format;        /* source format */

        struct snd_pcm_plugin_format 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)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t dst_frames);

        snd_pcm_sframes_t (*dst_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t src_frames);

        snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin,

                                             snd_pcm_uframes_t frames,

                                             struct snd_pcm_plugin_channel **channels);

        snd_pcm_sframes_t (*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);

        int (*action)(struct snd_pcm_plugin *plugin,

                      enum snd_pcm_plugin_action action,

                      unsigned long data);

        struct snd_pcm_plugin *prev;

        struct snd_pcm_plugin *next;

        struct snd_pcm_substream *plug;

        void *private_data;

        void (*private_free)(struct snd_pcm_plugin *plugin);

        char *buf;

        snd_pcm_uframes_t buf_frames;

        struct snd_pcm_plugin_channel *buf_channels;

        char extra_data[0];

};

int snd_pcm_plugin_build(struct snd_pcm_substream *handle,

                         const char *name,

                         struct snd_pcm_plugin_format *src_format,

                         struct snd_pcm_plugin_format *dst_format,

                         size_t extra,

                         struct snd_pcm_plugin **ret);

int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin);

int snd_pcm_plugin_clear(struct snd_pcm_plugin **first);

int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames);

snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size);

snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size);

#define FULL ROUTE_PLUGIN_RESOLUTION

#define HALF ROUTE_PLUGIN_RESOLUTION / 2

int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle,

                            struct snd_pcm_hw_params *params,

                            struct snd_pcm_plugin **r_plugin);

int snd_pcm_plugin_build_linear(struct snd_pcm_substream *handle,

                                struct snd_pcm_plugin_format *src_format,

                                struct snd_pcm_plugin_format *dst_format,

                                struct snd_pcm_plugin **r_plugin);

int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *handle,

                               struct snd_pcm_plugin_format *src_format,

                               struct snd_pcm_plugin_format *dst_format,

                               struct snd_pcm_plugin **r_plugin);

int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle,

                              struct snd_pcm_plugin_format *src_format,

                              struct snd_pcm_plugin_format *dst_format,

                              struct snd_pcm_plugin **r_plugin);

int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle,

                               struct snd_pcm_plugin_format *src_format,

                               struct snd_pcm_plugin_format *dst_format,

                               struct snd_pcm_plugin **r_plugin);

int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle,

                              struct snd_pcm_plugin_format *src_format,

                              struct snd_pcm_plugin_format *dst_format,

                              struct snd_pcm_plugin **r_plugin);

int snd_pcm_plug_format_plugins(struct snd_pcm_substream *substream,

                                struct snd_pcm_hw_params *params,

                                struct snd_pcm_hw_params *slave_params);

int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask);

int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin);

snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle,

                                              struct snd_pcm_plugin_channel *src_channels,

                                              snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle,

                                             struct snd_pcm_plugin_channel *dst_channels_final,

                                             snd_pcm_uframes_t size);

snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle,

                                                   char *buf, snd_pcm_uframes_t count,

                                                   struct snd_pcm_plugin_channel **channels);

snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin,

                                                 snd_pcm_uframes_t frames,

                                                 struct snd_pcm_plugin_channel **channels);

int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel,

                         size_t dst_offset,

                         size_t samples, int format);

int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel,

                      size_t src_offset,

                      const struct snd_pcm_channel_area *dst_channel,

                      size_t dst_offset,

                      size_t samples, int format);

void *snd_pcm_plug_buf_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t size);

void snd_pcm_plug_buf_unlock(struct snd_pcm_substream *plug, void *ptr);

snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream,

                                     const char *ptr, snd_pcm_uframes_t size,

                                     int in_kernel);

snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream,

                                    char *ptr, snd_pcm_uframes_t size, int in_kernel);

snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream,

                                      void **bufs, snd_pcm_uframes_t frames,

                                      int in_kernel);

snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream,

                                     void **bufs, snd_pcm_uframes_t frames,

                                     int in_kernel);

#else

static inline snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size) { return drv_size; }

static inline snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size) { return clt_size; }

static inline int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask) { return format; }

#endif

#ifdef PLUGIN_DEBUG

#define pdprintf( fmt, args... ) printk( "plugin: " fmt, ##args)

#else

#define pdprintf( fmt, args... ) 

#endif

#endif                          /* __PCM_PLUGIN_H */