Loading...
Searching...
No Matches
pcm.c File Reference
PCM Interface

PCM Interface. More...

Include dependency graph for pcm.c:

## Functions

const char * | snd_pcm_name (snd_pcm_t *pcm)
| get identifier of PCM handle
snd_pcm_type_t | snd_pcm_type (snd_pcm_t *pcm)
| get type of PCM handle
snd_pcm_stream_t | snd_pcm_stream (snd_pcm_t *pcm)
| get stream for a PCM handle
int | snd_pcm_close (snd_pcm_t *pcm)
| close PCM handle
int | snd_pcm_nonblock (snd_pcm_t *pcm, int nonblock)
| set nonblock mode
int | snd_pcm_info (snd_pcm_t *pcm, snd_pcm_info_t *info)
| Obtain general (static) information for PCM handle.
int | snd_pcm_hw_params_current (snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
| Retreive current PCM hardware configuration chosen with snd_pcm_hw_params.
int | snd_pcm_hw_params (snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
| Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare it.
int | snd_pcm_hw_free (snd_pcm_t *pcm)
| Remove PCM hardware configuration and free associated resources.
int | snd_pcm_sw_params (snd_pcm_t *pcm, snd_pcm_sw_params_t *params)
| Install PCM software configuration defined by params.
int | snd_pcm_status (snd_pcm_t *pcm, snd_pcm_status_t *status)
| Obtain status (runtime) information for PCM handle.
snd_pcm_state_t | snd_pcm_state (snd_pcm_t *pcm)
| Return PCM state.
int | snd_pcm_hwsync (snd_pcm_t *pcm)
| (DEPRECATED) Synchronize stream position with hardware
int | snd_pcm_delay (snd_pcm_t *pcm, snd_pcm_sframes_t *delayp)
| Obtain delay for a running PCM handle.
int | snd_pcm_resume (snd_pcm_t *pcm)
| Resume from suspend, no samples are lost.
int | snd_pcm_htimestamp (snd_pcm_t *pcm, snd_pcm_uframes_t *avail, snd_htimestamp_t *tstamp)
| Obtain last position update hi-res timestamp.
int | snd_pcm_prepare (snd_pcm_t *pcm)
| Prepare PCM for use.
int | snd_pcm_reset (snd_pcm_t *pcm)
| Reset PCM position.
int | snd_pcm_start (snd_pcm_t *pcm)
| Start a PCM.
int | snd_pcm_drop (snd_pcm_t *pcm)
| Stop a PCM dropping pending frames.
int | snd_pcm_drain (snd_pcm_t *pcm)
| Stop a PCM preserving pending frames.
int | snd_pcm_pause (snd_pcm_t *pcm, int enable)
| Pause/resume PCM.
snd_pcm_sframes_t | snd_pcm_rewindable (snd_pcm_t *pcm)
| Get safe count of frames which can be rewinded.
snd_pcm_sframes_t | snd_pcm_rewind (snd_pcm_t *pcm, snd_pcm_uframes_t frames)
| Move application frame position backward.
snd_pcm_sframes_t | snd_pcm_forwardable (snd_pcm_t *pcm)
| Get safe count of frames which can be forwarded.
snd_pcm_sframes_t | snd_pcm_forward (snd_pcm_t *pcm, snd_pcm_uframes_t frames)
| Move application frame position forward.
snd_pcm_sframes_t | snd_pcm_writei (snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size)
| Write interleaved frames to a PCM.
snd_pcm_sframes_t | snd_pcm_writen (snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
| Write non interleaved frames to a PCM.
snd_pcm_sframes_t | snd_pcm_readi (snd_pcm_t *pcm, void *buffer, snd_pcm_uframes_t size)
| Read interleaved frames from a PCM.
snd_pcm_sframes_t | snd_pcm_readn (snd_pcm_t *pcm, void **bufs, snd_pcm_uframes_t size)
| Read non interleaved frames to a PCM.
int | snd_pcm_link (snd_pcm_t *pcm1, snd_pcm_t *pcm2)
| Link two PCMs.
int | snd_pcm_unlink (snd_pcm_t *pcm)
| Remove a PCM from a linked group.
int | snd_pcm_poll_descriptors_count (snd_pcm_t *pcm)
| get count of poll descriptors for PCM handle
int | snd_pcm_poll_descriptors (snd_pcm_t *pcm, struct pollfd *pfds, unsigned int space)
| get poll descriptors
int | snd_pcm_poll_descriptors_revents (snd_pcm_t *pcm, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
| get returned events from poll descriptors
const char * | snd_pcm_stream_name (const snd_pcm_stream_t stream)
| get name of PCM stream type
const char * | snd_pcm_access_name (const snd_pcm_access_t acc)
| get name of PCM access type
const char * | snd_pcm_format_name (const snd_pcm_format_t format)
| get name of PCM sample format
const char * | snd_pcm_format_description (const snd_pcm_format_t format)
| get description of PCM sample format
snd_pcm_format_t | snd_pcm_format_value (const char *name)
| get PCM sample format from name
const char * | snd_pcm_subformat_name (const snd_pcm_subformat_t subformat)
| get name of PCM sample subformat
const char * | snd_pcm_subformat_description (const snd_pcm_subformat_t subformat)
| get description of PCM sample subformat
snd_pcm_subformat_t | snd_pcm_subformat_value (const char *name)
| get PCM sample subformat from name
const char * | snd_pcm_start_mode_name (snd_pcm_start_t mode)
| (DEPRECATED) get name of PCM start mode setting
const char * | snd_pcm_xrun_mode_name (snd_pcm_xrun_t mode)
| (DEPRECATED) get name of PCM xrun mode setting
const char * | snd_pcm_tstamp_mode_name (const snd_pcm_tstamp_t mode)
| get name of PCM tstamp mode setting
const char * | snd_pcm_tstamp_type_name (snd_pcm_tstamp_type_t type)
| get name of PCM tstamp type setting
const char * | snd_pcm_state_name (const snd_pcm_state_t state)
| get name of PCM state
const char * | snd_pcm_type_name (snd_pcm_type_t type)
| get name of PCM type
int | snd_pcm_dump_hw_setup (snd_pcm_t *pcm, snd_output_t *out)
| Dump current hardware setup for PCM.
int | snd_pcm_dump_sw_setup (snd_pcm_t *pcm, snd_output_t *out)
| Dump current software setup for PCM.
int | snd_pcm_dump_setup (snd_pcm_t *pcm, snd_output_t *out)
| Dump current setup (hardware and software) for PCM.
int | snd_pcm_status_dump (snd_pcm_status_t *status, snd_output_t *out)
| Dump status.
int | snd_pcm_dump (snd_pcm_t *pcm, snd_output_t *out)
| Dump PCM info.
snd_pcm_sframes_t | snd_pcm_bytes_to_frames (snd_pcm_t *pcm, ssize_t bytes)
| Convert bytes in frames for a PCM.
ssize_t | snd_pcm_frames_to_bytes (snd_pcm_t *pcm, snd_pcm_sframes_t frames)
| Convert frames in bytes for a PCM.
long | snd_pcm_bytes_to_samples (snd_pcm_t *pcm, ssize_t bytes)
| Convert bytes in samples for a PCM.
ssize_t | snd_pcm_samples_to_bytes (snd_pcm_t *pcm, long samples)
| Convert samples in bytes for a PCM.
int | snd_async_add_pcm_handler (snd_async_handler_t **handler, snd_pcm_t *pcm, snd_async_callback_t callback, void *private_data)
| Add an async handler for a PCM.
snd_pcm_t * | snd_async_handler_get_pcm (snd_async_handler_t *handler)
| Return PCM handle related to an async handler.
int | snd_pcm_open (snd_pcm_t **pcmp, const char *name, snd_pcm_stream_t stream, int mode)
| Opens a PCM.
int | snd_pcm_open_lconf (snd_pcm_t **pcmp, const char *name, snd_pcm_stream_t stream, int mode, snd_config_t *lconf)
| Opens a PCM using local configuration.
int | snd_pcm_open_fallback (snd_pcm_t **pcmp, snd_config_t *root, const char *name, const char *orig_name, snd_pcm_stream_t stream, int mode)
| Opens a fallback PCM.
int | snd_pcm_wait (snd_pcm_t *pcm, int timeout)
| Wait for a PCM to become ready.
snd_pcm_sframes_t | snd_pcm_avail_update (snd_pcm_t *pcm)
| Return number of frames ready to be read (capture) / written (playback)
snd_pcm_sframes_t | snd_pcm_avail (snd_pcm_t *pcm)
| Return number of frames ready to be read (capture) / written (playback)
int | snd_pcm_avail_delay (snd_pcm_t *pcm, snd_pcm_sframes_t *availp, snd_pcm_sframes_t *delayp)
| Combine snd_pcm_avail and snd_pcm_delay functions.
int | snd_pcm_area_silence (const snd_pcm_channel_area_t *dst_area, snd_pcm_uframes_t dst_offset, unsigned int samples, snd_pcm_format_t format)
| Silence an area.
int | snd_pcm_areas_silence (const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, unsigned int channels, snd_pcm_uframes_t frames, snd_pcm_format_t format)
| Silence one or more areas.
int | snd_pcm_area_copy (const snd_pcm_channel_area_t *dst_area, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_area, snd_pcm_uframes_t src_offset, unsigned int samples, snd_pcm_format_t format)
| Copy an area.
int | snd_pcm_areas_copy (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, snd_pcm_format_t format)
| Copy one or more areas.
int | snd_pcm_areas_copy_wrap (const snd_pcm_channel_area_t *dst_channels, snd_pcm_uframes_t dst_offset, const snd_pcm_uframes_t dst_size, const snd_pcm_channel_area_t *src_channels, snd_pcm_uframes_t src_offset, const snd_pcm_uframes_t src_size, const unsigned int channels, snd_pcm_uframes_t frames, const snd_pcm_format_t format)
| Copy one or more areas.
int | snd_pcm_hw_params_dump (snd_pcm_hw_params_t *params, snd_output_t *out)
| Dump a PCM hardware configuration space.
int | snd_pcm_hw_params_can_mmap_sample_resolution (const snd_pcm_hw_params_t *params)
| Check if hardware supports sample-resolution mmap for given configuration.
int | snd_pcm_hw_params_is_double (const snd_pcm_hw_params_t *params)
| Check if hardware does double buffering for start/stop for given configuration.
int | snd_pcm_hw_params_is_batch (const snd_pcm_hw_params_t *params)
| Check if hardware does double buffering for data transfers for given configuration.
int | snd_pcm_hw_params_is_block_transfer (const snd_pcm_hw_params_t *params)
| Check if hardware does block transfers for samples for given configuration.
int | snd_pcm_hw_params_is_monotonic (const snd_pcm_hw_params_t *params)
| Check if timestamps are monotonic for given configuration.
int | snd_pcm_hw_params_can_overrange (const snd_pcm_hw_params_t *params)
| Check if hardware supports overrange detection.
int | snd_pcm_hw_params_can_pause (const snd_pcm_hw_params_t *params)
| Check if hardware supports pause.
int | snd_pcm_hw_params_can_resume (const snd_pcm_hw_params_t *params)
| Check if hardware supports resume.
int | snd_pcm_hw_params_is_half_duplex (const snd_pcm_hw_params_t *params)
| Check if hardware does half-duplex only.
int | snd_pcm_hw_params_is_joint_duplex (const snd_pcm_hw_params_t *params)
| Check if hardware does joint-duplex (playback and capture are somewhat correlated)
int | snd_pcm_hw_params_can_sync_start (const snd_pcm_hw_params_t *params)
| Check if hardware supports synchronized start with sample resolution.
int | snd_pcm_hw_params_can_disable_period_wakeup (const snd_pcm_hw_params_t *params)
| Check if hardware can disable period wakeups.
int | snd_pcm_hw_params_is_perfect_drain (const snd_pcm_hw_params_t *params)
| Check if hardware is capable of perfect drain.
int | snd_pcm_hw_params_supports_audio_wallclock_ts (const snd_pcm_hw_params_t *params)
| Check if hardware supports audio wallclock timestamps.
int | snd_pcm_hw_params_supports_audio_ts_type (const snd_pcm_hw_params_t *params, int type)
| Check if hardware supports type of audio timestamps.
int | snd_pcm_hw_params_get_rate_numden (const snd_pcm_hw_params_t *params, unsigned int *rate_num, unsigned int *rate_den)
| Get rate exact info from a configuration space.
int | snd_pcm_hw_params_get_sbits (const snd_pcm_hw_params_t *params)
| Get sample resolution info from a configuration space.
int | snd_pcm_hw_params_get_fifo_size (const snd_pcm_hw_params_t *params)
| Get hardware FIFO size info from a configuration space.
int | snd_pcm_hw_params_any (snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
| Fill params with a full configuration space for a PCM.
size_t | snd_pcm_access_mask_sizeof ()
| get size of snd_pcm_access_mask_t
int | snd_pcm_access_mask_malloc (snd_pcm_access_mask_t **ptr)
| allocate an empty snd_pcm_access_mask_t using standard malloc
void | snd_pcm_access_mask_free (snd_pcm_access_mask_t *obj)
| frees a previously allocated snd_pcm_access_mask_t
void | snd_pcm_access_mask_copy (snd_pcm_access_mask_t *dst, const snd_pcm_access_mask_t *src)
| copy one snd_pcm_access_mask_t to another
void | snd_pcm_access_mask_none (snd_pcm_access_mask_t *mask)
| reset all bits in a snd_pcm_access_mask_t
void | snd_pcm_access_mask_any (snd_pcm_access_mask_t *mask)
| set all bits in a snd_pcm_access_mask_t
int | snd_pcm_access_mask_test (const snd_pcm_access_mask_t *mask, snd_pcm_access_t val)
| test the presence of an access type in a snd_pcm_access_mask_t
int | snd_pcm_access_mask_empty (const snd_pcm_access_mask_t *mask)
| test, if given a snd_pcm_access_mask_t is empty
void | snd_pcm_access_mask_set (snd_pcm_access_mask_t *mask, snd_pcm_access_t val)
| make an access type present in a snd_pcm_access_mask_t
void | snd_pcm_access_mask_reset (snd_pcm_access_mask_t *mask, snd_pcm_access_t val)
| make an access type missing from a snd_pcm_access_mask_t
size_t | snd_pcm_format_mask_sizeof ()
| get size of snd_pcm_format_mask_t
int | snd_pcm_format_mask_malloc (snd_pcm_format_mask_t **ptr)
| allocate an empty snd_pcm_format_mask_t using standard malloc
void | snd_pcm_format_mask_free (snd_pcm_format_mask_t *obj)
| frees a previously allocated snd_pcm_format_mask_t
void | snd_pcm_format_mask_copy (snd_pcm_format_mask_t *dst, const snd_pcm_format_mask_t *src)
| copy one snd_pcm_format_mask_t to another
void | snd_pcm_format_mask_none (snd_pcm_format_mask_t *mask)
| reset all bits in a snd_pcm_format_mask_t
void | snd_pcm_format_mask_any (snd_pcm_format_mask_t *mask)
| set all bits in a snd_pcm_format_mask_t
int | snd_pcm_format_mask_test (const snd_pcm_format_mask_t *mask, snd_pcm_format_t val)
| test the presence of a format in a snd_pcm_format_mask_t
int | snd_pcm_format_mask_empty (const snd_pcm_format_mask_t *mask)
| test, if given a snd_pcm_format_mask_t is empty
void | snd_pcm_format_mask_set (snd_pcm_format_mask_t *mask, snd_pcm_format_t val)
| make a format present in a snd_pcm_format_mask_t
void | snd_pcm_format_mask_reset (snd_pcm_format_mask_t *mask, snd_pcm_format_t val)
| make a format missing from a snd_pcm_format_mask_t
size_t | snd_pcm_subformat_mask_sizeof ()
| get size of snd_pcm_subformat_mask_t
int | snd_pcm_subformat_mask_malloc (snd_pcm_subformat_mask_t **ptr)
| allocate an empty snd_pcm_subformat_mask_t using standard malloc
void | snd_pcm_subformat_mask_free (snd_pcm_subformat_mask_t *obj)
| frees a previously allocated snd_pcm_subformat_mask_t
void | snd_pcm_subformat_mask_copy (snd_pcm_subformat_mask_t *dst, const snd_pcm_subformat_mask_t *src)
| copy one snd_pcm_subformat_mask_t to another
void | snd_pcm_subformat_mask_none (snd_pcm_subformat_mask_t *mask)
| reset all bits in a snd_pcm_subformat_mask_t
void | snd_pcm_subformat_mask_any (snd_pcm_subformat_mask_t *mask)
| set all bits in a snd_pcm_subformat_mask_t
int | snd_pcm_subformat_mask_test (const snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val)
| test the presence of a subformat in a snd_pcm_subformat_mask_t
int | snd_pcm_subformat_mask_empty (const snd_pcm_subformat_mask_t *mask)
| test, if given a snd_pcm_subformat_mask_t is empty
void | snd_pcm_subformat_mask_set (snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val)
| make a subformat present in a snd_pcm_subformat_mask_t
void | snd_pcm_subformat_mask_reset (snd_pcm_subformat_mask_t *mask, snd_pcm_subformat_t val)
| make a subformat missing from a snd_pcm_subformat_mask_t
size_t | snd_pcm_hw_params_sizeof ()
| get size of snd_pcm_hw_params_t
int | snd_pcm_hw_params_malloc (snd_pcm_hw_params_t **ptr)
| allocate an invalid snd_pcm_hw_params_t using standard malloc
void | snd_pcm_hw_params_free (snd_pcm_hw_params_t *obj)
| frees a previously allocated snd_pcm_hw_params_t
void | snd_pcm_hw_params_copy (snd_pcm_hw_params_t *dst, const snd_pcm_hw_params_t *src)
| copy one snd_pcm_hw_params_t to another
int | snd_pcm_hw_params_get_access (const snd_pcm_hw_params_t *params, snd_pcm_access_t *access)
| Extract access type from a configuration space.
int | snd_pcm_hw_params_test_access (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t access)
| Verify if an access type is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_access (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t access)
| Restrict a configuration space to contain only one access type.
int | snd_pcm_hw_params_set_access_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *access)
| Restrict a configuration space to contain only its first access type.
int | snd_pcm_hw_params_set_access_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *access)
| Restrict a configuration space to contain only its last access type.
int | snd_pcm_hw_params_set_access_mask (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask)
| Restrict a configuration space to contain only a set of access types.
int | snd_pcm_hw_params_get_access_mask (snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask)
| Get access mask from a configuration space.
int | snd_pcm_hw_params_get_format (const snd_pcm_hw_params_t *params, snd_pcm_format_t *format)
| Extract format from a configuration space.
int | snd_pcm_hw_params_test_format (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t format)
| Verify if a format is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_format (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t format)
| Restrict a configuration space to contain only one format.
int | snd_pcm_hw_params_set_format_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format)
| Restrict a configuration space to contain only its first format.
int | snd_pcm_hw_params_set_format_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format)
| Restrict a configuration space to contain only its last format.
int | snd_pcm_hw_params_set_format_mask (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask)
| Restrict a configuration space to contain only a set of formats.
void | snd_pcm_hw_params_get_format_mask (snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask)
| Get format mask from a configuration space.
int | snd_pcm_hw_params_get_subformat (const snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)
| Extract subformat from a configuration space.
int | snd_pcm_hw_params_test_subformat (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat)
| Verify if a subformat is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_subformat (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat)
| Restrict a configuration space to contain only one subformat.
int | snd_pcm_hw_params_set_subformat_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)
| Restrict a configuration space to contain only its first subformat.
int | snd_pcm_hw_params_set_subformat_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)
| Restrict a configuration space to contain only its last subformat.
int | snd_pcm_hw_params_set_subformat_mask (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask)
| Restrict a configuration space to contain only a set of subformats.
void | snd_pcm_hw_params_get_subformat_mask (snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask)
| Get subformat mask from a configuration space.
int | snd_pcm_hw_params_get_channels (const snd_pcm_hw_params_t *params, unsigned int *val)
| Extract channels from a configuration space.
int | snd_pcm_hw_params_get_channels_min (const snd_pcm_hw_params_t *params, unsigned int *val)
| Extract minimum channels count from a configuration space.
int | snd_pcm_hw_params_get_channels_max (const snd_pcm_hw_params_t *params, unsigned int *val)
| Extract maximum channels count from a configuration space.
int | snd_pcm_hw_params_test_channels (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
| Verify if a channels count is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_channels (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
| Restrict a configuration space to contain only one channels count.
int | snd_pcm_hw_params_set_channels_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Restrict a configuration space with a minimum channels count.
int | snd_pcm_hw_params_set_channels_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Restrict a configuration space with a maximum channels count.
int | snd_pcm_hw_params_set_channels_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, unsigned int *max)
| Restrict a configuration space to have channels counts in a given range.
int | snd_pcm_hw_params_set_channels_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Restrict a configuration space to have channels count nearest to a target.
int | snd_pcm_hw_params_set_channels_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Restrict a configuration space to contain only its minimum channels count.
int | snd_pcm_hw_params_set_channels_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Restrict a configuration space to contain only its maximum channels count.
int | snd_pcm_hw_params_get_rate (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract rate from a configuration space.
int | snd_pcm_hw_params_get_rate_min (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract minimum rate from a configuration space.
int | snd_pcm_hw_params_get_rate_max (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract maximum rate from a configuration space.
int | snd_pcm_hw_params_test_rate (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Verify if a rate is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_rate (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Restrict a configuration space to contain only one rate.
int | snd_pcm_hw_params_set_rate_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a minimum rate.
int | snd_pcm_hw_params_set_rate_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a maximum rate.
int | snd_pcm_hw_params_set_rate_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
| Restrict a configuration space to have rates in a given range.
int | snd_pcm_hw_params_set_rate_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to have rate nearest to a target.
int | snd_pcm_hw_params_set_rate_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its minimum rate.
int | snd_pcm_hw_params_set_rate_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its maximum rate.
int | snd_pcm_hw_params_set_rate_resample (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
| Restrict a configuration space to contain only real hardware rates.
int | snd_pcm_hw_params_get_rate_resample (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Extract resample state from a configuration space.
int | snd_pcm_hw_params_set_export_buffer (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
| Restrict a configuration space to allow the buffer to be accessible from outside.
int | snd_pcm_hw_params_get_export_buffer (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Extract buffer accessibility from a configuration space.
int | snd_pcm_hw_params_set_period_wakeup (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
| Restrict a configuration space to settings without period wakeups.
int | snd_pcm_hw_params_get_period_wakeup (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Extract period wakeup flag from a configuration space.
int | snd_pcm_hw_params_set_drain_silence (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)
| Restrict a configuration space to fill the end of playback stream with silence when drain() is invoked.
int | snd_pcm_hw_params_get_drain_silence (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)
| Extract drain with the filling of silence samples from a configuration space.
int | snd_pcm_hw_params_get_period_time (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract period time from a configuration space.
int | snd_pcm_hw_params_get_period_time_min (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract minimum period time from a configuration space.
int | snd_pcm_hw_params_get_period_time_max (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract maximum period time from a configuration space.
int | snd_pcm_hw_params_test_period_time (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Verify if a period time is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_period_time (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Restrict a configuration space to contain only one period time.
int | snd_pcm_hw_params_set_period_time_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a minimum period time.
int | snd_pcm_hw_params_set_period_time_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a maximum period time.
int | snd_pcm_hw_params_set_period_time_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
| Restrict a configuration space to have period times in a given range.
int | snd_pcm_hw_params_set_period_time_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to have period time nearest to a target.
int | snd_pcm_hw_params_set_period_time_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its minimum period time.
int | snd_pcm_hw_params_set_period_time_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its maximum period time.
int | snd_pcm_hw_params_get_period_size (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Extract period size from a configuration space.
int | snd_pcm_hw_params_get_period_size_min (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Extract minimum period size from a configuration space.
int | snd_pcm_hw_params_get_period_size_max (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Extract maximum period size from a configuration space.
int | snd_pcm_hw_params_test_period_size (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir)
| Verify if a period size is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_period_size (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir)
| Restrict a configuration space to contain only one period size.
int | snd_pcm_hw_params_set_period_size_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Restrict a configuration space with a minimum period size.
int | snd_pcm_hw_params_set_period_size_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Restrict a configuration space with a maximum period size.
int | snd_pcm_hw_params_set_period_size_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, int *mindir, snd_pcm_uframes_t *max, int *maxdir)
| Restrict a configuration space to have period sizes in a given range.
int | snd_pcm_hw_params_set_period_size_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Restrict a configuration space to have period size nearest to a target.
int | snd_pcm_hw_params_set_period_size_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Restrict a configuration space to contain only its minimum period size.
int | snd_pcm_hw_params_set_period_size_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)
| Restrict a configuration space to contain only its maximum period size.
int | snd_pcm_hw_params_set_period_size_integer (snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
| Restrict a configuration space to contain only integer period sizes.
int | snd_pcm_hw_params_get_periods (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract periods from a configuration space.
int | snd_pcm_hw_params_get_periods_min (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract minimum periods count from a configuration space.
int | snd_pcm_hw_params_get_periods_max (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract maximum periods count from a configuration space.
int | snd_pcm_hw_params_test_periods (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Verify if a periods count is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_periods (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Restrict a configuration space to contain only one periods count.
int | snd_pcm_hw_params_set_periods_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a minimum periods count.
int | snd_pcm_hw_params_set_periods_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a maximum periods count.
int | snd_pcm_hw_params_set_periods_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
| Restrict a configuration space to have periods counts in a given range.
int | snd_pcm_hw_params_set_periods_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to have periods count nearest to a target.
int | snd_pcm_hw_params_set_periods_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its minimum periods count.
int | snd_pcm_hw_params_set_periods_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its maximum periods count.
int | snd_pcm_hw_params_set_periods_integer (snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
| Restrict a configuration space to contain only integer periods counts.
int | snd_pcm_hw_params_get_buffer_time (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract buffer time from a configuration space.
int | snd_pcm_hw_params_get_buffer_time_min (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract minimum buffer time from a configuration space.
int | snd_pcm_hw_params_get_buffer_time_max (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Extract maximum buffer time from a configuration space.
int | snd_pcm_hw_params_test_buffer_time (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Verify if a buffer time is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_buffer_time (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| Restrict a configuration space to contain only one buffer time.
int | snd_pcm_hw_params_set_buffer_time_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a minimum buffer time.
int | snd_pcm_hw_params_set_buffer_time_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space with a maximum buffer time.
int | snd_pcm_hw_params_set_buffer_time_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
| Restrict a configuration space to have buffer times in a given range.
int | snd_pcm_hw_params_set_buffer_time_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to have buffer time nearest to a target.
int | snd_pcm_hw_params_set_buffer_time_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its minimum buffer time.
int | snd_pcm_hw_params_set_buffer_time_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| Restrict a configuration space to contain only its maximum buffered time.
int | snd_pcm_hw_params_get_buffer_size (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Extract buffer size from a configuration space.
int | snd_pcm_hw_params_get_buffer_size_min (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Extract minimum buffer size from a configuration space.
int | snd_pcm_hw_params_get_buffer_size_max (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Extract maximum buffer size from a configuration space.
int | snd_pcm_hw_params_test_buffer_size (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val)
| Verify if a buffer size is available inside a configuration space for a PCM.
int | snd_pcm_hw_params_set_buffer_size (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val)
| Restrict a configuration space to contain only one buffer size.
int | snd_pcm_hw_params_set_buffer_size_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Restrict a configuration space with a minimum buffer size.
int | snd_pcm_hw_params_set_buffer_size_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Restrict a configuration space with a maximum buffer size.
int | snd_pcm_hw_params_set_buffer_size_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, snd_pcm_uframes_t *max)
| Restrict a configuration space to have buffer sizes in a given range.
int | snd_pcm_hw_params_set_buffer_size_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Restrict a configuration space to have buffer size nearest to a target.
int | snd_pcm_hw_params_set_buffer_size_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Restrict a configuration space to contain only its minimum buffer size.
int | snd_pcm_hw_params_set_buffer_size_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Restrict a configuration space to contain only its maximum buffer size.
int | snd_pcm_hw_params_get_tick_time (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Extract tick time from a configuration space
int | snd_pcm_hw_params_get_tick_time_min (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Extract minimum tick time from a configuration space
int | snd_pcm_hw_params_get_tick_time_max (const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Extract maximum tick time from a configuration space
int | snd_pcm_hw_params_test_tick_time (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| (DEPRECATED) Verify if a tick time is available inside a configuration space for a PCM
int | snd_pcm_hw_params_set_tick_time (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)
| (DEPRECATED) Restrict a configuration space to contain only one tick time
int | snd_pcm_hw_params_set_tick_time_min (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Restrict a configuration space with a minimum tick time
int | snd_pcm_hw_params_set_tick_time_max (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Restrict a configuration space with a maximum tick time
int | snd_pcm_hw_params_set_tick_time_minmax (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)
| (DEPRECATED) Restrict a configuration space to have tick times in a given range
int | snd_pcm_hw_params_set_tick_time_near (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Restrict a configuration space to have tick time nearest to a target
int | snd_pcm_hw_params_set_tick_time_first (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Restrict a configuration space to contain only its minimum tick time
int | snd_pcm_hw_params_set_tick_time_last (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)
| (DEPRECATED) Restrict a configuration space to contain only its maximum tick time
int | snd_pcm_hw_params_get_min_align (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)
| Get the minimum transfer align value in samples.
int | snd_pcm_sw_params_current (snd_pcm_t *pcm, snd_pcm_sw_params_t *params)
| Return current software configuration for a PCM.
int | snd_pcm_sw_params_dump (snd_pcm_sw_params_t *params, snd_output_t *out)
| Dump a software configuration.
size_t | snd_pcm_sw_params_sizeof ()
| get size of snd_pcm_sw_params_t
int | snd_pcm_sw_params_malloc (snd_pcm_sw_params_t **ptr)
| allocate an invalid snd_pcm_sw_params_t using standard malloc
void | snd_pcm_sw_params_free (snd_pcm_sw_params_t *obj)
| frees a previously allocated snd_pcm_sw_params_t
void | snd_pcm_sw_params_copy (snd_pcm_sw_params_t *dst, const snd_pcm_sw_params_t *src)
| copy one snd_pcm_sw_params_t to another
int | snd_pcm_sw_params_get_boundary (const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
| Get boundary for ring pointers from a software configuration container.
int | snd_pcm_sw_params_set_start_mode (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_start_t val)
| (DEPRECATED) Set start mode inside a software configuration container
snd_pcm_start_t | snd_pcm_sw_params_get_start_mode (const snd_pcm_sw_params_t *params)
| (DEPRECATED) Get start mode from a software configuration container
int | snd_pcm_sw_params_set_xrun_mode (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_xrun_t val)
| (DEPRECATED) Set xrun mode inside a software configuration container
snd_pcm_xrun_t | snd_pcm_sw_params_get_xrun_mode (const snd_pcm_sw_params_t *params)
| (DEPRECATED) Get xrun mode from a software configuration container
int | snd_pcm_sw_params_set_tstamp_mode (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_t val)
| Set timestamp mode inside a software configuration container.
int | snd_pcm_sw_params_get_tstamp_mode (const snd_pcm_sw_params_t *params, snd_pcm_tstamp_t *val)
| Get timestamp mode from a software configuration container.
int | snd_pcm_sw_params_set_tstamp_type (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t val)
| Set timestamp type inside a software configuration container.
int | snd_pcm_sw_params_get_tstamp_type (const snd_pcm_sw_params_t *params, snd_pcm_tstamp_type_t *val)
| Get timestamp type from a software configuration container.
int | snd_pcm_sw_params_set_sleep_min (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, unsigned int val)
| (DEPRECATED) Set minimum number of ticks to sleep inside a software configuration container
int | snd_pcm_sw_params_get_sleep_min (const snd_pcm_sw_params_t *params, unsigned int *val)
| (DEPRECATED) Get minimum numbers of ticks to sleep from a software configuration container
int | snd_pcm_sw_params_set_avail_min (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
| Set avail min inside a software configuration container.
int | snd_pcm_sw_params_get_avail_min (const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
| Get avail min from a software configuration container.
int | snd_pcm_sw_params_set_period_event (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, int val)
| Set period event inside a software configuration container.
int | snd_pcm_sw_params_get_period_event (const snd_pcm_sw_params_t *params, int *val)
| Get period event from a software configuration container.
int | snd_pcm_sw_params_set_xfer_align (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
| (DEPRECATED) Set xfer align inside a software configuration container
int | snd_pcm_sw_params_get_xfer_align (const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
| (DEPRECATED) Get xfer align from a software configuration container
int | snd_pcm_sw_params_set_start_threshold (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
| Set start threshold inside a software configuration container.
int | snd_pcm_sw_params_get_start_threshold (const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
| Get start threshold from a software configuration container.
int | snd_pcm_sw_params_set_stop_threshold (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
| Set stop threshold inside a software configuration container.
int | snd_pcm_sw_params_get_stop_threshold (const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
| Get stop threshold from a software configuration container.
int | snd_pcm_sw_params_set_silence_threshold (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
| Set silence threshold inside a software configuration container.
int | snd_pcm_sw_params_get_silence_threshold (const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
| Get silence threshold from a software configuration container.
int | snd_pcm_sw_params_set_silence_size (snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val)
| Set silence size inside a software configuration container.
int | snd_pcm_sw_params_get_silence_size (const snd_pcm_sw_params_t *params, snd_pcm_uframes_t *val)
| Get silence size from a software configuration container.
size_t | snd_pcm_status_sizeof ()
| get size of snd_pcm_status_t
int | snd_pcm_status_malloc (snd_pcm_status_t **ptr)
| allocate an invalid snd_pcm_status_t using standard malloc
void | snd_pcm_status_free (snd_pcm_status_t *obj)
| frees a previously allocated snd_pcm_status_t
void | snd_pcm_status_copy (snd_pcm_status_t *dst, const snd_pcm_status_t *src)
| copy one snd_pcm_status_t to another
snd_pcm_state_t | snd_pcm_status_get_state (const snd_pcm_status_t *obj)
| Get state from a PCM status container (see snd_pcm_state)
void | snd_pcm_status_get_trigger_tstamp (const snd_pcm_status_t *obj, snd_timestamp_t *ptr)
| Get trigger timestamp from a PCM status container.
void | snd_pcm_status_get_trigger_htstamp (const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
| Get trigger hi-res timestamp from a PCM status container.
void | snd_pcm_status_get_tstamp (const snd_pcm_status_t *obj, snd_timestamp_t *ptr)
| Get "now" timestamp from a PCM status container.
void | snd_pcm_status_get_htstamp (const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
| Get "now" hi-res timestamp from a PCM status container.
void | snd_pcm_status_get_audio_htstamp (const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
| Get "now" hi-res audio timestamp from a PCM status container.
void | snd_pcm_status_get_driver_htstamp (const snd_pcm_status_t *obj, snd_htimestamp_t *ptr)
| Get "now" hi-res driver timestamp from a PCM status container. Defines when the status was generated by driver, may differ from normal timestamp.
void | snd_pcm_status_get_audio_htstamp_report (const snd_pcm_status_t *obj, snd_pcm_audio_tstamp_report_t *audio_tstamp_report)
| Get audio_tstamp_report from a PCM status container.
void | snd_pcm_status_set_audio_htstamp_config (snd_pcm_status_t *obj, snd_pcm_audio_tstamp_config_t *audio_tstamp_config)
| set audio_tstamp_config from a PCM status container
snd_pcm_sframes_t | snd_pcm_status_get_delay (const snd_pcm_status_t *obj)
| Get delay from a PCM status container (see snd_pcm_delay)
snd_pcm_uframes_t | snd_pcm_status_get_avail (const snd_pcm_status_t *obj)
| Get number of frames available from a PCM status container (see snd_pcm_avail_update)
snd_pcm_uframes_t | snd_pcm_status_get_avail_max (const snd_pcm_status_t *obj)
| Get maximum number of frames available from a PCM status container after last snd_pcm_status call.
snd_pcm_uframes_t | snd_pcm_status_get_overrange (const snd_pcm_status_t *obj)
| Get count of ADC overrange detections since last call.
size_t | snd_pcm_info_sizeof ()
| get size of snd_pcm_info_t
int | snd_pcm_info_malloc (snd_pcm_info_t **ptr)
| allocate an invalid snd_pcm_info_t using standard malloc
void | snd_pcm_info_free (snd_pcm_info_t *obj)
| frees a previously allocated snd_pcm_info_t
void | snd_pcm_info_copy (snd_pcm_info_t *dst, const snd_pcm_info_t *src)
| copy one snd_pcm_info_t to another
unsigned int | snd_pcm_info_get_device (const snd_pcm_info_t *obj)
| Get device from a PCM info container.
unsigned int | snd_pcm_info_get_subdevice (const snd_pcm_info_t *obj)
| Get subdevice from a PCM info container.
snd_pcm_stream_t | snd_pcm_info_get_stream (const snd_pcm_info_t *obj)
| Get stream (direction) from a PCM info container.
int | snd_pcm_info_get_card (const snd_pcm_info_t *obj)
| Get card from a PCM info container.
const char * | snd_pcm_info_get_id (const snd_pcm_info_t *obj)
| Get id from a PCM info container.
const char * | snd_pcm_info_get_name (const snd_pcm_info_t *obj)
| Get name from a PCM info container.
const char * | snd_pcm_info_get_subdevice_name (const snd_pcm_info_t *obj)
| Get subdevice name from a PCM info container.
snd_pcm_class_t | snd_pcm_info_get_class (const snd_pcm_info_t *obj)
| Get class from a PCM info container.
snd_pcm_subclass_t | snd_pcm_info_get_subclass (const snd_pcm_info_t *obj)
| Get subclass from a PCM info container.
unsigned int | snd_pcm_info_get_subdevices_count (const snd_pcm_info_t *obj)
| Get subdevices count from a PCM info container.
unsigned int | snd_pcm_info_get_subdevices_avail (const snd_pcm_info_t *obj)
| Get available subdevices count from a PCM info container.
snd_pcm_sync_id_t | snd_pcm_info_get_sync (const snd_pcm_info_t *obj)
| Get hardware synchronization ID from a PCM info container.
void | snd_pcm_info_set_device (snd_pcm_info_t *obj, unsigned int val)
| Set wanted device inside a PCM info container (see snd_ctl_pcm_info)
void | snd_pcm_info_set_subdevice (snd_pcm_info_t *obj, unsigned int val)
| Set wanted subdevice inside a PCM info container (see snd_ctl_pcm_info)
void | snd_pcm_info_set_stream (snd_pcm_info_t *obj, snd_pcm_stream_t val)
| Set wanted stream inside a PCM info container (see snd_ctl_pcm_info)
int | snd_pcm_mmap_begin (snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames)
| Application request to access a portion of direct (mmap) area.
snd_pcm_sframes_t | snd_pcm_mmap_commit (snd_pcm_t *pcm, snd_pcm_uframes_t offset, snd_pcm_uframes_t frames)
| Application has completed the access to area requested with snd_pcm_mmap_begin.
snd_pcm_chmap_query_t ** | snd_pcm_query_chmaps (snd_pcm_t *pcm)
void | snd_pcm_free_chmaps (snd_pcm_chmap_query_t **maps)
snd_pcm_chmap_t * | snd_pcm_get_chmap (snd_pcm_t *pcm)
int | snd_pcm_set_chmap (snd_pcm_t *pcm, const snd_pcm_chmap_t *map)
const char * | snd_pcm_chmap_type_name (enum snd_pcm_chmap_type val)
const char * | snd_pcm_chmap_name (enum snd_pcm_chmap_position val)
const char * | snd_pcm_chmap_long_name (enum snd_pcm_chmap_position val)
int | snd_pcm_chmap_print (const snd_pcm_chmap_t *map, size_t maxlen, char *buf)
unsigned int | snd_pcm_chmap_from_string (const char *str)
snd_pcm_chmap_t * | snd_pcm_chmap_parse_string (const char *str)
int | snd_pcm_recover (snd_pcm_t *pcm, int err, int silent)
| Recover the stream state from an error or suspend.
int | snd_pcm_set_params (snd_pcm_t *pcm, snd_pcm_format_t format, snd_pcm_access_t access, unsigned int channels, unsigned int rate, int soft_resample, unsigned int latency)
| Set the hardware and software parameters in a simple way.
int | snd_pcm_get_params (snd_pcm_t *pcm, snd_pcm_uframes_t *buffer_size, snd_pcm_uframes_t *period_size)
| Get the transfer size parameters in a simple way.

## Detailed Description

PCM Interface.

Author
  Jaroslav Kysela perex.nosp@m.@per.nosp@m.ex.cz
  Abramo Bagnara abram.nosp@m.o@al.nosp@m.sa-pr.nosp@m.ojec.nosp@m.t.org

Date
  2000-2001

PCM Interface is designed to write or read digital audio frames. A frame is the data unit converted into/from sound in one time unit (1/rate seconds), by example if you set your playback PCM rate to 44100 you'll hear 44100 frames per second. The size in bytes of a frame may be obtained from bits needed to store a sample and channels count.

See the PCM (digital audio) interface page for more details.

## Function Documentation

## snd_pcm_tstamp_type_name()

const char * snd_pcm_tstamp_type_name | ( | snd_pcm_tstamp_type_t | type | ) |

get name of PCM tstamp type setting

Parameters

  type | PCM tstamp type

Returns
  ascii name of PCM tstamp type setting