Defines | |
#define | snd_pcm_hw_params_alloca(ptr) |
allocate an invalid snd_pcm_hw_params_t using standard alloca | |
Functions | |
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. | |
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_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 hard are FIFO size info from a configuration space. | |
size_t | snd_pcm_hw_params_sizeof (void) |
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 *val) |
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 val) |
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 val) |
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 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_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 *frames, 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 *frames, 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 *frames, 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_min_align (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val) |
Get the minimum transfer align value in samples. |
See the PCM (digital audio) interface page for more details.
#define snd_pcm_hw_params_alloca | ( | ptr | ) |
allocate an invalid snd_pcm_hw_params_t using standard alloca
ptr | returned pointer |
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.
pcm | PCM handle | |
params | 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.
params | Configuration space |
0 | Hardware doesn't support sample-resolution mmap | |
1 | Hardware supports sample-resolution mmap |
The return value is always one when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
int snd_pcm_hw_params_can_overrange | ( | const snd_pcm_hw_params_t * | params | ) |
Check, if hardware supports overrange detection.
params | Configuration space |
0 | Hardware doesn't support overrange detection | |
1 | Hardware supports overrange detection |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
int snd_pcm_hw_params_can_pause | ( | const snd_pcm_hw_params_t * | params | ) |
Check, if hardware supports pause.
params | Configuration space |
0 | Hardware doesn't support pause | |
1 | Hardware supports pause |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
int snd_pcm_hw_params_can_resume | ( | const snd_pcm_hw_params_t * | params | ) |
Check, if hardware supports resume.
params | Configuration space |
0 | Hardware doesn't support resume | |
1 | Hardware supports resume |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
int snd_pcm_hw_params_can_sync_start | ( | const snd_pcm_hw_params_t * | params | ) |
Check, if hardware supports synchronized start with sample resolution.
params | Configuration space |
0 | Hardware doesn't support synchronized start | |
1 | Hardware supports synchronized start |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
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
dst | pointer to destination | |
src | pointer to source |
void snd_pcm_hw_params_free | ( | snd_pcm_hw_params_t * | obj | ) |
frees a previously allocated snd_pcm_hw_params_t
obj | pointer to object to free |
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.
params | Configuration space | |
access | Returned value |
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.
params | Configuration space | |
mask | Returned Access mask |
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.
params | Configuration space | |
val | Returned buffer size in frames |
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.
params | Configuration space | |
val | Returned approximate maximum buffer size in frames |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | Returned approximate minimum buffer size in frames |
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.
params | Configuration space | |
val | Returned buffer time in us | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
params | Configuration space | |
val | approximate maximum buffer duration in us | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | approximate minimum buffer duration in us | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
int snd_pcm_hw_params_get_channels | ( | const snd_pcm_hw_params_t * | params, | |
unsigned int * | val | |||
) |
Extract channels from a configuration space.
params | Configuration space | |
val | Returned channels count |
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.
params | Configuration space | |
val | maximum channels count |
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.
params | Configuration space | |
val | minimum channels count |
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.
pcm | PCM handle | |
params | Configuration space | |
val | 0 = disable, 1 = enable exporting buffer |
int snd_pcm_hw_params_get_fifo_size | ( | const snd_pcm_hw_params_t * | params | ) |
Get hard are FIFO size info from a configuration space.
params | Configuration space |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the 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.
params | Configuration space | |
format | returned format |
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.
params | Configuration space | |
mask | Returned Format mask |
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.
params | Configuration space | |
val | Returned minimum align value |
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.
params | Configuration space | |
val | Returned approximate period size in frames | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
params | Configuration space | |
val | approximate minimum period size in frames | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | approximate minimum period size in frames | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | Returned approximate period duration in us | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
params | Configuration space | |
val | approximate maximum period duration in us | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | approximate minimum period duration in us | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | approximate periods per buffer | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
params | Configuration space | |
val | approximate maximum periods per buffer | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | approximate minimum periods per buffer | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | Returned approximate rate | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
params | Configuration space | |
val | Returned approximate maximum rate | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
val | Returned approximate minimum rate | |
dir | Sub unit direction |
Exact value is <,=,> the returned one following dir (-1,0,1)
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.
params | Configuration space | |
rate_num | Pointer to returned rate numerator | |
rate_den | Pointer to returned rate denominator |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
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.
pcm | PCM handle | |
params | Configuration space | |
val | 0 = disable, 1 = enable rate resampling |
int snd_pcm_hw_params_get_sbits | ( | const snd_pcm_hw_params_t * | params | ) |
Get sample resolution info from a configuration space.
params | Configuration space |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the 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.
params | Configuration space | |
subformat | Returned subformat value |
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.
params | Configuration space | |
mask | Returned Subformat mask |
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.
params | Configuration space |
0 | Hardware doesn't do double buffering for data transfers | |
1 | Hardware does double buffering for data transfers |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
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.
params | Configuration space |
0 | Hardware doesn't block transfers | |
1 | Hardware does block transfers |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
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.
params | Configuration space |
0 | Hardware doesn't do double buffering for start/stop | |
1 | Hardware does double buffering for start/stop |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
int snd_pcm_hw_params_is_half_duplex | ( | const snd_pcm_hw_params_t * | params | ) |
Check, if hardware does half-duplex only.
params | Configuration space |
0 | Hardware doesn't do half-duplex | |
1 | Hardware does half-duplex |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
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).
params | Configuration space |
0 | Hardware doesn't do joint-duplex | |
1 | Hardware does joint-duplex |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
int snd_pcm_hw_params_is_monotonic | ( | const snd_pcm_hw_params_t * | params | ) |
Check, if timestamps are monotonic for given configuration.
params | Configuration space |
0 | Device doesn't do monotomic timestamps | |
1 | Device does monotonic timestamps |
It is not allowed to call this function when given configuration is not exactly one. Usually, snd_pcm_hw_params() function chooses one configuration from the configuration space.
int snd_pcm_hw_params_malloc | ( | snd_pcm_hw_params_t ** | ptr | ) |
allocate an invalid snd_pcm_hw_params_t using standard malloc
ptr | returned pointer |
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.
pcm | PCM handle | |
params | Configuration space | |
access | 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.
pcm | PCM handle | |
params | Configuration space | |
access | Returned 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.
pcm | PCM handle | |
params | Configuration space | |
access | Returned 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.
pcm | PCM handle | |
params | Configuration space | |
mask | Access mask |
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.
pcm | PCM handle | |
params | Configuration space | |
val | buffer size in frames |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned minimum buffer size in frames |
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned maximum buffer size in frames |
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate maximum buffer size in frames (on return filled with actual maximum) |
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate minimum buffer size in frames (on return filled with actual minimum) |
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.
pcm | PCM handle | |
params | Configuration space | |
min | approximate minimum buffer size in frames (on return filled with actual minimum) | |
max | approximate maximum buffer size in frames (on return filled with actual maximum) |
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate target buffer size in frames / returned chosen approximate target buffer size in frames |
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate buffer duration in us | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned approximate minimum buffer duration in us | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned approximate maximum buffer duration in us | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate maximum buffer duration in us (on return filled with actual maximum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact maximum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate minimum buffer duration in us (on return filled with actual minimum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact minimum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
min | approximate minimum buffer duration in us (on return filled with actual minimum) | |
mindir | Sub unit direction for minimum (on return filled with actual direction) | |
max | approximate maximum buffer duration in us (on return filled with actual maximum) | |
maxdir | Sub unit direction for maximum (on return filled with actual direction) |
Wanted/actual exact min/max is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate target buffer duration in us / returned chosen approximate target buffer duration | |
dir | Sub unit direction |
target/chosen exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | channels count |
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.
pcm | PCM handle | |
params | Configuration space | |
val | 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.
pcm | PCM handle | |
params | Configuration space | |
val | maximum 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.
pcm | PCM handle | |
params | Configuration space | |
val | maximum channels count (on return filled with actual maximum) |
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.
pcm | PCM handle | |
params | Configuration space | |
val | minimum channels count (on return filled with actual minimum) |
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.
pcm | PCM handle | |
params | Configuration space | |
min | minimum channels count (on return filled with actual minimum) | |
max | maximum channels count (on return filled with actual maximum) |
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.
pcm | PCM handle | |
params | Configuration space | |
val | target channels count, returned chosen channels count |
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 accessible from outside.
pcm | PCM handle | |
params | Configuration space | |
val | 0 = disable, 1 = enable (default) exporting buffer |
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.
pcm | PCM handle | |
params | Configuration space | |
format | 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.
pcm | PCM handle | |
params | Configuration space | |
format | Returned 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.
pcm | PCM handle | |
params | Configuration space | |
format | Returned 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.
pcm | PCM handle | |
params | Configuration space | |
mask | Format mask |
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate period size in frames | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned maximum approximate period size in frames | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space |
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned maximum approximate period size in frames | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate maximum period size in frames (on return filled with actual maximum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact minimum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate minimum period size in frames (on return filled with actual minimum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact minimum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
min | approximate minimum period size in frames (on return filled with actual minimum) | |
mindir | Sub unit direction for minimum (on return filled with actual direction) | |
max | approximate maximum period size in frames (on return filled with actual maximum) | |
maxdir | Sub unit direction for maximum (on return filled with actual direction) |
Wanted/actual exact min/max is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate target period size in frames / returned chosen approximate target period size | |
dir | Sub unit direction |
target/chosen exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate period duration in us | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned approximate period duration in us | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned maximum approximate period time | |
dir | Sub unit direction |
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate maximum period duration in us (on return filled with actual maximum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact maximum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate minimum period duration in us (on return filled with actual minimum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact minimum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
min | approximate minimum period duration in us (on return filled with actual minimum) | |
mindir | Sub unit direction for minimum (on return filled with actual direction) | |
max | approximate maximum period duration in us (on return filled with actual maximum) | |
maxdir | Sub unit direction for maximum (on return filled with actual direction) |
Wanted/actual exact min/max is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate target period duration in us / returned chosen approximate target period duration | |
dir | Sub unit direction |
target/chosen exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate periods per buffer | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned approximate minimum periods per buffer | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space |
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned approximate maximum periods per buffer | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate maximum periods per buffer (on return filled with actual maximum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact maximum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate minimum periods per buffer (on return filled with actual minimum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact minimum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
min | approximate minimum periods per buffer (on return filled with actual minimum) | |
mindir | Sub unit direction for minimum (on return filled with actual direction) | |
max | approximate maximum periods per buffer (on return filled with actual maximum) | |
maxdir | Sub unit direction for maximum (on return filled with actual direction) |
Wanted/actual exact min/max is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate target periods per buffer / returned chosen approximate target periods per buffer | |
dir | Sub unit direction |
target/chosen exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate rate | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned minimum approximate rate | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | Returned maximum approximate rate | |
dir | Sub unit direction |
Actual exact value is <,=,> the approximate one following dir (-1, 0, 1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate maximum rate (on return filled with actual maximum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact maximum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate minimum rate (on return filled with actual minimum) | |
dir | Sub unit direction (on return filled with actual direction) |
Wanted/actual exact minimum is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
min | approximate minimum rate (on return filled with actual minimum) | |
mindir | Sub unit direction for minimum (on return filled with actual direction) | |
max | approximate maximum rate (on return filled with actual maximum) | |
maxdir | Sub unit direction for maximum (on return filled with actual direction) |
Wanted/actual exact min/max is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate target rate / returned approximate set rate | |
dir | Sub unit direction |
target/chosen exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | 0 = disable, 1 = enable (default) rate resampling |
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.
pcm | PCM handle | |
params | Configuration space | |
subformat | subformat value |
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.
pcm | PCM handle | |
params | Configuration space | |
subformat | Returned 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.
pcm | PCM handle | |
params | Configuration space | |
subformat | Returned 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.
pcm | PCM handle | |
params | Configuration space | |
mask | Subformat mask |
size_t snd_pcm_hw_params_sizeof | ( | void | ) |
get size of snd_pcm_hw_params_t
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.
pcm | PCM handle | |
params | Configuration space | |
access | access type |
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.
pcm | PCM handle | |
params | Configuration space | |
val | buffer size in frames |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate buffer duration in us | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | channels count |
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.
pcm | PCM handle | |
params | Configuration space | |
format | format |
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate period size in frames | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate period duration in us | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate periods per buffer | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
val | approximate rate | |
dir | Sub unit direction |
Wanted exact value is <,=,> val following dir (-1,0,1)
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.
pcm | PCM handle | |
params | Configuration space | |
subformat | subformat value |