diff options
Diffstat (limited to 'polyp/alsa-util.c')
| -rw-r--r-- | polyp/alsa-util.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/polyp/alsa-util.c b/polyp/alsa-util.c index eaa21d49..52eaaed4 100644 --- a/polyp/alsa-util.c +++ b/polyp/alsa-util.c @@ -30,7 +30,9 @@ #include "sample.h" #include "xmalloc.h" -int pa_alsa_set_hw_params(snd_pcm_t *pcm_handle, struct pa_sample_spec *ss, uint32_t *periods, snd_pcm_uframes_t *period_size) { +/* Set the hardware parameters of the given ALSA device. Returns the + * selected fragment settings in *period/*period_size */ +int pa_alsa_set_hw_params(snd_pcm_t *pcm_handle, const struct pa_sample_spec *ss, uint32_t *periods, snd_pcm_uframes_t *period_size) { int ret = -1; snd_pcm_uframes_t buffer_size; snd_pcm_hw_params_t *hwparams = NULL; @@ -79,6 +81,11 @@ finish: return ret; } +/* Allocate an IO event for every ALSA poll descriptor for the + * specified ALSA device. Return a pointer to such an array in + * *io_events. Store the length of that array in *n_io_events. Use the + * specified callback function and userdata. The array has to be freed + * with pa_free_io_events(). */ int pa_create_io_events(snd_pcm_t *pcm_handle, struct pa_mainloop_api* m, struct pa_io_event ***io_events, unsigned *n_io_events, void (*cb)(struct pa_mainloop_api*a, struct pa_io_event *e, int fd, enum pa_io_event_flags events, void *userdata), void *userdata) { unsigned i; struct pollfd *pfds, *ppfd; @@ -106,6 +113,7 @@ int pa_create_io_events(snd_pcm_t *pcm_handle, struct pa_mainloop_api* m, struct return 0; } +/* Free the memory allocated by pa_create_io_events() */ void pa_free_io_events(struct pa_mainloop_api* m, struct pa_io_event **io_events, unsigned n_io_events) { unsigned i; struct pa_io_event **ios; |