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add new function pa_usec_to_bytes() as inverse of pa_bytes_to_usec()

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@942 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2006-05-21 14:06:33 +00:00
parent bc87137a8f
commit 651e575575
2 changed files with 9 additions and 0 deletions
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6
src/polyp/sample.c
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@ -66,6 +66,12 @@ pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec) {
return (pa_usec_t) (((double) length/pa_frame_size(spec)*1000000)/spec->rate);
}
size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec) {
assert(spec);
return ((double) t * spec->rate / 1000000)*pa_frame_size(spec);
}
int pa_sample_spec_valid(const pa_sample_spec *spec) {
assert(spec);

3
src/polyp/sample.h
View file

@ -160,6 +160,9 @@ size_t pa_sample_size(const pa_sample_spec *spec);
/** Calculate the time the specified bytes take to play with the specified sample type */
pa_usec_t pa_bytes_to_usec(uint64_t length, const pa_sample_spec *spec);
/** Calculates the number of bytes that are required for the specified time. \since 0.9 */
size_t pa_usec_to_bytes(pa_usec_t t, const pa_sample_spec *spec);
/** Return non-zero when the sample type specification is valid */
int pa_sample_spec_valid(const pa_sample_spec *spec);