mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-29 05:40:25 -04:00
261 lines
11 KiB
C
261 lines
11 KiB
C
/****************************************************************************
|
|
* *
|
|
* pcm.h *
|
|
* Digital Audio Interface *
|
|
* *
|
|
****************************************************************************/
|
|
|
|
#define SND_PCM_OPEN_PLAYBACK 0x0001
|
|
#define SND_PCM_OPEN_CAPTURE 0x0002
|
|
#define SND_PCM_OPEN_DUPLEX 0x0003
|
|
#define SND_PCM_OPEN_NONBLOCK 0x1000
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct snd_pcm snd_pcm_t;
|
|
typedef struct snd_pcm_loopback snd_pcm_loopback_t;
|
|
|
|
int snd_pcm_open(snd_pcm_t **handle, int card, int device, int mode);
|
|
int snd_pcm_open_subdevice(snd_pcm_t **handle, int card, int device, int subdevice, int mode);
|
|
int snd_pcm_close(snd_pcm_t *handle);
|
|
int snd_pcm_file_descriptor(snd_pcm_t *handle, int channel);
|
|
int snd_pcm_nonblock_mode(snd_pcm_t *handle, int nonblock);
|
|
int snd_pcm_info(snd_pcm_t *handle, snd_pcm_info_t * info);
|
|
int snd_pcm_channel_info(snd_pcm_t *handle, snd_pcm_channel_info_t * info);
|
|
int snd_pcm_channel_params(snd_pcm_t *handle, snd_pcm_channel_params_t * params);
|
|
int snd_pcm_channel_setup(snd_pcm_t *handle, snd_pcm_channel_setup_t * setup);
|
|
int snd_pcm_channel_status(snd_pcm_t *handle, snd_pcm_channel_status_t * status);
|
|
int snd_pcm_playback_prepare(snd_pcm_t *handle);
|
|
int snd_pcm_capture_prepare(snd_pcm_t *handle);
|
|
int snd_pcm_channel_prepare(snd_pcm_t *handle, int channel);
|
|
int snd_pcm_playback_go(snd_pcm_t *handle);
|
|
int snd_pcm_capture_go(snd_pcm_t *handle);
|
|
int snd_pcm_channel_go(snd_pcm_t *handle, int channel);
|
|
int snd_pcm_sync_go(snd_pcm_t *handle, snd_pcm_sync_t *sync);
|
|
int snd_pcm_playback_drain(snd_pcm_t *handle);
|
|
int snd_pcm_playback_flush(snd_pcm_t *handle);
|
|
int snd_pcm_capture_flush(snd_pcm_t *handle);
|
|
int snd_pcm_channel_flush(snd_pcm_t *handle, int channel);
|
|
int snd_pcm_playback_pause(snd_pcm_t *handle, int enable);
|
|
ssize_t snd_pcm_transfer_size(snd_pcm_t *handle, int channel);
|
|
ssize_t snd_pcm_write(snd_pcm_t *handle, const void *buffer, size_t size);
|
|
ssize_t snd_pcm_read(snd_pcm_t *handle, void *buffer, size_t size);
|
|
ssize_t snd_pcm_writev(snd_pcm_t *pcm, const struct iovec *vector, int count);
|
|
ssize_t snd_pcm_readv(snd_pcm_t *pcm, const struct iovec *vector, int count);
|
|
int snd_pcm_mmap(snd_pcm_t *handle, int channel, snd_pcm_mmap_control_t **control, void **buffer);
|
|
int snd_pcm_munmap(snd_pcm_t *handle, int channel);
|
|
|
|
/* misc */
|
|
|
|
int snd_pcm_format_signed(int format);
|
|
int snd_pcm_format_unsigned(int format);
|
|
int snd_pcm_format_linear(int format);
|
|
int snd_pcm_format_little_endian(int format);
|
|
int snd_pcm_format_big_endian(int format);
|
|
int snd_pcm_format_width(int format); /* in bits */
|
|
int snd_pcm_format_physical_width(int format); /* in bits */
|
|
int snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
|
|
ssize_t snd_pcm_format_size(int format, size_t samples);
|
|
unsigned char snd_pcm_format_silence(int format);
|
|
const char *snd_pcm_get_format_name(int format);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* PCM Plug-In interface
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct snd_stru_pcm_plugin snd_pcm_plugin_t;
|
|
#define snd_pcm_plugin_handle_t snd_pcm_t
|
|
|
|
typedef enum {
|
|
INIT = 0,
|
|
PREPARE = 1,
|
|
DRAIN = 2,
|
|
FLUSH = 3,
|
|
} snd_pcm_plugin_action_t;
|
|
|
|
typedef struct snd_stru_pcm_plugin_voice {
|
|
void *aptr; /* pointer to the allocated area */
|
|
void *addr; /* address to voice samples */
|
|
unsigned int offset; /* offset to first voice in bits */
|
|
unsigned int next; /* offset to next voice in bits */
|
|
} snd_pcm_plugin_voice_t;
|
|
|
|
struct snd_stru_pcm_plugin {
|
|
char *name; /* plug-in name */
|
|
snd_pcm_format_t src_format; /* source format */
|
|
snd_pcm_format_t dst_format; /* destination format */
|
|
int src_width; /* sample width in bits */
|
|
int dst_width; /* sample width in bits */
|
|
ssize_t (*src_samples)(snd_pcm_plugin_t *plugin, size_t dst_samples);
|
|
ssize_t (*dst_samples)(snd_pcm_plugin_t *plugin, size_t src_samples);
|
|
int (*src_voices)(snd_pcm_plugin_t *plugin,
|
|
snd_pcm_plugin_voice_t **voices,
|
|
size_t samples,
|
|
void *(*plugin_alloc)(snd_pcm_plugin_handle_t *handle, size_t size));
|
|
int (*dst_voices)(snd_pcm_plugin_t *plugin,
|
|
snd_pcm_plugin_voice_t **voices,
|
|
size_t samples,
|
|
void *(*plugin_alloc)(snd_pcm_plugin_handle_t *handle, size_t size));
|
|
ssize_t (*transfer)(snd_pcm_plugin_t *plugin,
|
|
const snd_pcm_plugin_voice_t *src_voices,
|
|
const snd_pcm_plugin_voice_t *dst_voices,
|
|
size_t samples);
|
|
int (*action)(snd_pcm_plugin_t *plugin,
|
|
snd_pcm_plugin_action_t action,
|
|
unsigned long data);
|
|
int (*parameter_set)(snd_pcm_plugin_t *plugin,
|
|
const char *name,
|
|
unsigned long value);
|
|
int (*parameter_get)(snd_pcm_plugin_t *plugin,
|
|
const char *name,
|
|
unsigned long *value);
|
|
snd_pcm_plugin_t *prev;
|
|
snd_pcm_plugin_t *next;
|
|
snd_pcm_plugin_handle_t *handle;
|
|
void *private_data;
|
|
void (*private_free)(snd_pcm_plugin_t *plugin, void *private_data);
|
|
snd_pcm_plugin_voice_t *voices;
|
|
void *extra_data;
|
|
};
|
|
|
|
snd_pcm_plugin_t *snd_pcm_plugin_build(snd_pcm_plugin_handle_t *handle,
|
|
const char *name,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
int extra);
|
|
int snd_pcm_plugin_free(snd_pcm_plugin_t *plugin);
|
|
int snd_pcm_plugin_clear(snd_pcm_t *handle, int channel);
|
|
int snd_pcm_plugin_insert(snd_pcm_t *handle, int channel, snd_pcm_plugin_t *plugin);
|
|
int snd_pcm_plugin_append(snd_pcm_t *handle, int channel, snd_pcm_plugin_t *plugin);
|
|
int snd_pcm_plugin_remove_to(snd_pcm_t *handle, int channel, snd_pcm_plugin_t *plugin);
|
|
int snd_pcm_plugin_remove_first(snd_pcm_t *handle, int channel);
|
|
snd_pcm_plugin_t *snd_pcm_plugin_first(snd_pcm_t *handle, int channel);
|
|
snd_pcm_plugin_t *snd_pcm_plugin_last(snd_pcm_t *handle, int channel);
|
|
ssize_t snd_pcm_plugin_client_samples(snd_pcm_t *handle, int channel, size_t drv_samples);
|
|
ssize_t snd_pcm_plugin_hardware_samples(snd_pcm_t *handle, int channel, size_t clt_samples);
|
|
ssize_t snd_pcm_plugin_client_size(snd_pcm_t *handle, int channel, size_t drv_size);
|
|
ssize_t snd_pcm_plugin_hardware_size(snd_pcm_t *handle, int channel, size_t clt_size);
|
|
int snd_pcm_plugin_info(snd_pcm_t *handle, snd_pcm_channel_info_t *info);
|
|
int snd_pcm_plugin_params(snd_pcm_t *handle, snd_pcm_channel_params_t *params);
|
|
int snd_pcm_plugin_setup(snd_pcm_t *handle, snd_pcm_channel_setup_t *setup);
|
|
int snd_pcm_plugin_status(snd_pcm_t *handle, snd_pcm_channel_status_t *status);
|
|
int snd_pcm_plugin_prepare(snd_pcm_t *handle, int channel);
|
|
int snd_pcm_plugin_playback_drain(snd_pcm_t *handle);
|
|
int snd_pcm_plugin_flush(snd_pcm_t *handle, int channel);
|
|
ssize_t snd_pcm_plugin_transfer_size(snd_pcm_t *handle, int channel);
|
|
int snd_pcm_plugin_pointer(snd_pcm_t *pcm, int channel, void **ptr, size_t *size);
|
|
ssize_t snd_pcm_plugin_write(snd_pcm_t *handle, const void *buffer, size_t size);
|
|
ssize_t snd_pcm_plugin_read(snd_pcm_t *handle, void *bufer, size_t size);
|
|
int snd_pcm_plugin_pointerv(snd_pcm_t *pcm, int channel, struct iovec **vector, int *count);
|
|
ssize_t snd_pcm_plugin_writev(snd_pcm_t *pcm, const struct iovec *vector, int count);
|
|
ssize_t snd_pcm_plugin_readv(snd_pcm_t *pcm, const struct iovec *vector, int count);
|
|
ssize_t snd_pcm_plugin_write_continue(snd_pcm_t *pcm);
|
|
|
|
/*
|
|
* Plug-In helpers
|
|
*/
|
|
|
|
ssize_t snd_pcm_plugin_src_samples_to_size(snd_pcm_plugin_t *plugin, size_t samples);
|
|
ssize_t snd_pcm_plugin_dst_samples_to_size(snd_pcm_plugin_t *plugin, size_t samples);
|
|
ssize_t snd_pcm_plugin_src_size_to_samples(snd_pcm_plugin_t *plugin, size_t size);
|
|
ssize_t snd_pcm_plugin_dst_size_to_samples(snd_pcm_plugin_t *plugin, size_t size);
|
|
int snd_pcm_plugin_src_voices(snd_pcm_plugin_t *plugin,
|
|
snd_pcm_plugin_voice_t **voices,
|
|
size_t samples);
|
|
int snd_pcm_plugin_dst_voices(snd_pcm_plugin_t *plugin,
|
|
snd_pcm_plugin_voice_t **voices,
|
|
size_t samples);
|
|
|
|
/*
|
|
* Plug-In constructors
|
|
*/
|
|
|
|
/* basic I/O */
|
|
int snd_pcm_plugin_build_stream(snd_pcm_plugin_handle_t *handle, int channel,
|
|
snd_pcm_format_t *format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_block(snd_pcm_plugin_handle_t *handle, int channel,
|
|
snd_pcm_format_t *format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_mmap(snd_pcm_plugin_handle_t *handle, int channel,
|
|
snd_pcm_format_t *format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
/* conversion plugins */
|
|
int snd_pcm_plugin_build_interleave(snd_pcm_plugin_handle_t *handle,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_linear(snd_pcm_plugin_handle_t *handle,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_mulaw(snd_pcm_plugin_handle_t *handle,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_alaw(snd_pcm_plugin_handle_t *handle,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_adpcm(snd_pcm_plugin_handle_t *handle,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_rate(snd_pcm_plugin_handle_t *handle,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
int snd_pcm_plugin_build_route(snd_pcm_plugin_handle_t *handle,
|
|
snd_pcm_format_t *src_format,
|
|
snd_pcm_format_t *dst_format,
|
|
float *ttable,
|
|
snd_pcm_plugin_t **r_plugin);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Loopback interface
|
|
*/
|
|
|
|
#define SND_PCM_LB_OPEN_PLAYBACK 0
|
|
#define SND_PCM_LB_OPEN_CAPTURE 1
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct snd_pcm_loopback_callbacks {
|
|
void *private_data; /* should be used with an application */
|
|
size_t max_buffer_size; /* zero = default (64kB) */
|
|
void (*data) (void *private_data, char *buffer, size_t count);
|
|
void (*position_change) (void *private_data, unsigned int pos);
|
|
void (*format_change) (void *private_data, snd_pcm_format_t *format);
|
|
void (*silence) (void *private_data, size_t count);
|
|
void *reserved[31]; /* reserved for the future use - must be NULL!!! */
|
|
} snd_pcm_loopback_callbacks_t;
|
|
|
|
int snd_pcm_loopback_open(snd_pcm_loopback_t **handle, int card, int device, int subdev, int mode);
|
|
int snd_pcm_loopback_close(snd_pcm_loopback_t *handle);
|
|
int snd_pcm_loopback_file_descriptor(snd_pcm_loopback_t *handle);
|
|
int snd_pcm_loopback_block_mode(snd_pcm_loopback_t *handle, int enable);
|
|
int snd_pcm_loopback_stream_mode(snd_pcm_loopback_t *handle, int mode);
|
|
int snd_pcm_loopback_format(snd_pcm_loopback_t *handle, snd_pcm_format_t * format);
|
|
int snd_pcm_loopback_status(snd_pcm_loopback_t *handle, snd_pcm_loopback_status_t * status);
|
|
ssize_t snd_pcm_loopback_read(snd_pcm_loopback_t *handle, snd_pcm_loopback_callbacks_t * callbacks);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|