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/*
* PCM - Common plugin code
* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
*
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
typedef struct {
snd_pcm_t *slave;
int close_slave;
snd_pcm_xfer_areas_func_t read;
snd_pcm_xfer_areas_func_t write;
snd_pcm_sframes_t (*client_frames)(snd_pcm_t *pcm, snd_pcm_sframes_t frames);
snd_pcm_sframes_t (*slave_frames)(snd_pcm_t *pcm, snd_pcm_sframes_t frames);
int (*init)(snd_pcm_t *pcm);
int shmid;
snd_pcm_uframes_t appl_ptr, hw_ptr;
} snd_pcm_plugin_t;
int snd_pcm_plugin_close(snd_pcm_t *pcm);
int snd_pcm_plugin_card(snd_pcm_t *pcm);
int snd_pcm_plugin_nonblock(snd_pcm_t *pcm, int nonblock);
int snd_pcm_plugin_async(snd_pcm_t *pcm, int sig, pid_t pid);
int snd_pcm_plugin_info(snd_pcm_t *pcm, snd_pcm_info_t * info);
int snd_pcm_plugin_hw_free(snd_pcm_t *pcm);
int snd_pcm_plugin_sw_refine(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
int snd_pcm_plugin_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
int snd_pcm_plugin_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t * info);
int snd_pcm_plugin_status(snd_pcm_t *pcm, snd_pcm_status_t * status);
snd_pcm_state_t snd_pcm_plugin_state(snd_pcm_t *pcm);
int snd_pcm_plugin_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delayp);
int snd_pcm_plugin_prepare(snd_pcm_t *pcm);
int snd_pcm_plugin_start(snd_pcm_t *pcm);
int snd_pcm_plugin_drop(snd_pcm_t *pcm);
int snd_pcm_plugin_drain(snd_pcm_t *pcm);
int snd_pcm_plugin_pause(snd_pcm_t *pcm, int enable);
snd_pcm_sframes_t snd_pcm_plugin_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames);
snd_pcm_sframes_t snd_pcm_plugin_writei(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plugin_writen(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plugin_readi(snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plugin_readn(snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plugin_mmap_forward(snd_pcm_t *pcm, snd_pcm_uframes_t size);
snd_pcm_sframes_t snd_pcm_plugin_avail_update(snd_pcm_t *pcm);
int snd_pcm_plugin_mmap_status(snd_pcm_t *pcm);
int snd_pcm_plugin_mmap_control(snd_pcm_t *pcm);
int snd_pcm_plugin_mmap(snd_pcm_t *pcm);
int snd_pcm_plugin_munmap_status(snd_pcm_t *pcm);
int snd_pcm_plugin_munmap_control(snd_pcm_t *pcm);
int snd_pcm_plugin_munmap(snd_pcm_t *pcm);
int snd_pcm_plugin_poll_descriptor(snd_pcm_t *pcm);
int snd_pcm_plugin_hw_params_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
int snd_pcm_plugin_hw_refine_slave(snd_pcm_t *pcm, snd_pcm_hw_params_t *params);
#define SND_PCM_FMTBIT_LINEAR \
((1 << (unsigned long) SND_PCM_FORMAT_S8) | \
(1 << (unsigned long) SND_PCM_FORMAT_U8) | \
(1 << (unsigned long) SND_PCM_FORMAT_S16_LE) | \
(1 << (unsigned long) SND_PCM_FORMAT_S16_BE) | \
(1 << (unsigned long) SND_PCM_FORMAT_U16_LE) | \
(1 << (unsigned long) SND_PCM_FORMAT_U16_BE) | \
(1 << (unsigned long) SND_PCM_FORMAT_S24_LE) | \
(1 << (unsigned long) SND_PCM_FORMAT_S24_BE) | \
(1 << (unsigned long) SND_PCM_FORMAT_U24_LE) | \
(1 << (unsigned long) SND_PCM_FORMAT_U24_BE) | \
(1 << (unsigned long) SND_PCM_FORMAT_S32_LE) | \
(1 << (unsigned long) SND_PCM_FORMAT_S32_BE) | \
(1 << (unsigned long) SND_PCM_FORMAT_U32_LE) | \
(1 << (unsigned long) SND_PCM_FORMAT_U32_BE))
extern snd_pcm_fast_ops_t snd_pcm_plugin_fast_ops;
#define RATE_MIN 4000
#define RATE_MAX 192000
#define ROUTE_PLUGIN_FLOAT 1
#define ROUTE_PLUGIN_RESOLUTION 16
#if ROUTE_PLUGIN_FLOAT
typedef float snd_pcm_route_ttable_entry_t;
#define HALF 0.5
#define FULL 1.0
#else
typedef int snd_pcm_route_ttable_entry_t;
#define HALF (ROUTE_PLUGIN_RESOLUTION / 2)
#define FULL ROUTE_PLUGIN_RESOLUTION
#endif
int snd_pcm_linear_get_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
int snd_pcm_linear_put_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
int snd_pcm_linear_convert_index(snd_pcm_format_t src_format, snd_pcm_format_t dst_format);
int snd_pcm_copy_open(snd_pcm_t **pcmp, char *name, snd_pcm_t *slave, int close_slave);
int snd_pcm_linear_open(snd_pcm_t **pcmp, char *name, snd_pcm_format_t sformat, snd_pcm_t *slave, int close_slave);
int snd_pcm_mulaw_open(snd_pcm_t **pcmp, char *name, snd_pcm_format_t sformat, snd_pcm_t *slave, int close_slave);
int snd_pcm_alaw_open(snd_pcm_t **pcmp, char *name, snd_pcm_format_t sformat, snd_pcm_t *slave, int close_slave);
int snd_pcm_adpcm_open(snd_pcm_t **pcmp, char *name, snd_pcm_format_t sformat, snd_pcm_t *slave, int close_slave);
int snd_pcm_route_load_ttable(snd_config_t *tt, snd_pcm_route_ttable_entry_t *ttable,
unsigned int tt_csize, unsigned int tt_ssize,
unsigned int *tt_cused, unsigned int *tt_sused,
int schannels);
int snd_pcm_route_open(snd_pcm_t **pcmp, char *name,
snd_pcm_format_t sformat, unsigned int schannels,
snd_pcm_route_ttable_entry_t *ttable,
unsigned int tt_ssize,
unsigned int tt_cused, unsigned int tt_sused,
snd_pcm_t *slave, int close_slave);
int snd_pcm_rate_open(snd_pcm_t **pcmp, char *name, snd_pcm_format_t sformat, int srate, snd_pcm_t *slave, int close_slave);
#define SND_PCM_ACCBIT_PLUGIN ((1 << (unsigned long) SND_PCM_ACCESS_MMAP_INTERLEAVED) | \
(1 << (unsigned long) SND_PCM_ACCESS_RW_INTERLEAVED) | \
(1 << (unsigned long) SND_PCM_ACCESS_MMAP_NONINTERLEAVED) | \
(1 << (unsigned long) SND_PCM_ACCESS_RW_NONINTERLEAVED))
void snd_pcm_linear_convert(const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames, int convidx);
void snd_pcm_alaw_decode(const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames, int putidx);
void snd_pcm_alaw_encode(const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames, int getidx);
void snd_pcm_mulaw_decode(const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames, int putidx);
void snd_pcm_mulaw_encode(const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames, int getidx);
typedef struct _snd_pcm_adpcm_state {
int pred_val; /* Calculated predicted value */
int step_idx; /* Previous StepSize lookup index */
} snd_pcm_adpcm_state_t;
void snd_pcm_adpcm_decode(const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames, int putidx,
snd_pcm_adpcm_state_t *states);
void snd_pcm_adpcm_encode(const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset,
unsigned int channels, snd_pcm_uframes_t frames, int getidx,
snd_pcm_adpcm_state_t *states);
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