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resampler: Make some basic functions for rewinding

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The resampler framework just forwards the request to the lfe filter.
There are no resampler impl that can rewind yet, so just reset the
resampler impl instead of properly rewinding yet.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
This commit is contained in:
David Henningsson 2015-03-24 10:29:18 +01:00
parent defc2b702b
commit 7fb531d936
4 changed files with 22 additions and 5 deletions
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18
src/pulsecore/resampler.c
View file

@ -578,6 +578,20 @@ void pa_resampler_reset(pa_resampler *r) {
*r->have_leftover = false;
}
void pa_resampler_rewind(pa_resampler *r, size_t out_frames) {
pa_assert(r);
/* For now, we don't have any rewindable resamplers, so we just
reset the resampler instead (and hope that nobody hears the difference). */
if (r->impl.reset)
r->impl.reset(r);
if (r->lfe_filter)
pa_lfe_filter_rewind(r->lfe_filter, out_frames);
*r->have_leftover = false;
}
pa_resample_method_t pa_resampler_get_method(pa_resampler *r) {
pa_assert(r);
@ -818,8 +832,8 @@ static void setup_remap(const pa_resampler *r, pa_remap_t *m, bool *lfe_filter_r
} else {
/* OK, we shall do the full monty: upmixing and downmixing. Our
* algorithm is relatively simple, does not do spacialization, delay
* elements or apply lowpass filters for LFE. Patches are always
* algorithm is relatively simple, does not do spacialization, or delay
* elements. LFE filters are done after the remap step. Patches are always
* welcome, though. Oh, and it doesn't do any matrix decoding. (Which
* probably wouldn't make any sense anyway.)
*