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author | Chris Robinson <[email protected]> | 2019-09-26 19:24:29 -0700 |
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committer | Chris Robinson <[email protected]> | 2019-09-26 19:24:29 -0700 |
commit | 9b64e5e0db2a778313bb873bb38f481ce40efe31 (patch) | |
tree | 4ac057e992a8720abf57e1ce548d4bda1a750f42 /al/effect.cpp | |
parent | d50ca464cd5e4f07bc399fd244578b0b34d72aef (diff) |
Implement a "fast" bsinc path
This takes advantage of the fact than when increment <= 1 (when not down-
sampling), the scale factor is always 0. As a result, the scale and scale-phase
deltas never contribute to the filtered output. Removing those multiply+add
operations cuts half of the work done by the inner loop.
Sounds that do need to down-sample (when played with a high pitch, or is 48khz
on 44.1khz output, for example), still go through the normal bsinc process.
Diffstat (limited to 'al/effect.cpp')
0 files changed, 0 insertions, 0 deletions