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WAV importer: use cubic interpolation on resampler

This commit is contained in:
DeeJayLSP 2024-03-01 20:06:48 -03:00
parent dad6c774b0
commit 7fa3431dca
1 changed files with 2 additions and 10 deletions
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12
editor/import/resource_importer_wav.cpp
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@ -328,7 +328,7 @@ Error ResourceImporterWAV::import(const String &p_source_file, const String &p_s
int ipos = 0; int ipos = 0;
for (int i = 0; i < new_data_frames; i++) { for (int i = 0; i < new_data_frames; i++) {
//simple cubic interpolation should be enough. // Cubic interpolation should be enough.
float mu = frac; float mu = frac;
@ -337,15 +337,7 @@ Error ResourceImporterWAV::import(const String &p_source_file, const String &p_s
float y2 = data[MIN(frames - 1, ipos + 1) * format_channels + c]; float y2 = data[MIN(frames - 1, ipos + 1) * format_channels + c];
float y3 = data[MIN(frames - 1, ipos + 2) * format_channels + c]; float y3 = data[MIN(frames - 1, ipos + 2) * format_channels + c];
float mu2 = mu * mu; new_data.write[i * format_channels + c] = Math::cubic_interpolate(y1, y2, y0, y3, mu);
float a0 = y3 - y2 - y0 + y1;
float a1 = y0 - y1 - a0;
float a2 = y2 - y0;
float a3 = y1;
float res = (a0 * mu * mu2 + a1 * mu2 + a2 * mu + a3);
new_data.write[i * format_channels + c] = res;
// update position and always keep fractional part within ]0...1] // update position and always keep fractional part within ]0...1]
// in order to avoid 32bit floating point precision errors // in order to avoid 32bit floating point precision errors