diff options
| author | Eric Laurent <elaurent@google.com> | 2011-06-18 10:10:23 -0700 |
|---|---|---|
| committer | Simon Wilson <simonwilson@google.com> | 2011-07-25 10:53:36 -0700 |
| commit | 40b018e35a29c1fa7fcc52b8297d52e97df93568 (patch) | |
| tree | f73f6ae0c8ca4a0f17238af46524311ec89bcc00 /include | |
| parent | c8aedefba2dda8da5cbc2343f02eac5925a42001 (diff) | |
pcm: add pcm_get_htimestamp() function
pcm_get_htimestamp() returns the number of available frames
in the kernel driver buffers as well as the corresponding
high resolution time stamp.
Diffstat (limited to 'include')
| -rw-r--r-- | include/tinyalsa/asoundlib.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/tinyalsa/asoundlib.h b/include/tinyalsa/asoundlib.h index 14511c9..7b13c0d 100644 --- a/include/tinyalsa/asoundlib.h +++ b/include/tinyalsa/asoundlib.h @@ -29,6 +29,7 @@ #ifndef ASOUNDLIB_H #define ASOUNDLIB_H +#include <sys/time.h> /* * PCM API @@ -90,6 +91,15 @@ unsigned int pcm_get_buffer_size(struct pcm *pcm); /* Returns the pcm latency in ms */ unsigned int pcm_get_latency(struct pcm *pcm); +/* Returns available frames in pcm buffer and corresponding time stamp. + * For an input stream, frames available are frames ready for the + * application to read. + * For an output stream, frames available are the number of empty frames available + * for the application to write. + */ +int pcm_get_htimestamp(struct pcm *pcm, unsigned int *avail, + struct timespec *tstamp); + /* Write data to the fifo. * Will start playback on the first write or on a write that * occurs after a fifo underrun. |