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resample: keep fractional part of in_rate when interpolating

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When interpolating with rate correction != 1.0, don't floor the
resulting input rate to the nearest smallest integer.

This allows rate corrections < 1/in_rate to have some effect, and
reduces jumps in the response. One of the jumps is inconveniently
between rate=1.0 and rate=1.0+eps and will cause rate corrections to
oscillate if target rate varies close to 1.0.
This commit is contained in:
Pauli Virtanen 2025-07-27 01:49:34 +03:00 • committed by Wim Taymans
parent 244d5a1cc1
commit 847982eb0e
2 changed files with 11 additions and 10 deletions
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2
spa/plugins/audioconvert/resample-native-impl.h
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@ -39,7 +39,7 @@ struct native_data {
double rate;
uint32_t n_taps;
uint32_t n_phases;
uint32_t in_rate;
struct fixp in_rate;
uint32_t out_rate;
struct fixp phase;
float pm;