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Add loop point crossfading in the sample editor.

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This commit is contained in:
LeviathaninWaves 2023-12-01 15:06:42 -06:00
parent d7ca3469a4
commit 4bd0dc2c63
6 changed files with 69 additions and 1 deletions
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57
src/gui/sampleEdit.cpp
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@ -1226,6 +1226,63 @@ void FurnaceGUI::drawSampleEdit() {
ImGui::SameLine();
ImGui::Dummy(ImVec2(4.0*dpiScale,dpiScale));
sameLineMaybe();
ImGui::Button("Crossfade");
if (ImGui::IsItemHovered()) {
ImGui::SetTooltip("Crossfade loop points.");
}
if (openSampleXFadeOpt) {
openSampleXFadeOpt=false;
ImGui::OpenPopup("SXFadeOpt");
}
if (ImGui::BeginPopupContextItem("SXFadeÓpt",ImGuiPopupFlags_MouseButtonLeft)) {
if (ImGui::SliderInt("Number of samples", &sampleXFadeLoopLength, 0, 100000)) {
if (sampleXFadeLoopLength<0) sampleXFadeLoopLength=0;
if (sampleXFadeLoopLength>sample->loopStart) sampleXFadeLoopLength=sample->loopStart;
if (sampleXFadeLoopLength>100000) sampleXFadeLoopLength=100000;
}
if (ImGui::SliderInt("Linear <-> Equal power", &sampleXFadeLoopLaw, 0, 100000)) {
if (sampleXFadeLoopLaw<0) sampleXFadeLoopLaw=0;
if (sampleXFadeLoopLaw>100000) sampleXFadeLoopLaw=100000;
}
if (ImGui::Button("Apply")) {
sample->prepareUndo(true);
e->lockEngine([this,sample]{
SAMPLE_OP_BEGIN;
double l=1.0/(double)sampleXFadeLoopLength;
double evar=1.0-sampleXFadeLoopLaw/200000.0;
if (sample->depth==DIV_SAMPLE_DEPTH_8BIT) {
unsigned int xfadeInput=sample->loopStart-sampleXFadeLoopLength;
unsigned int xfadeOutput=sample->loopEnd-sampleXFadeLoopLength;
for (int i=0;i<sampleXFadeLoopLength;i++) {
double f1=std::pow(i*l,evar);
double f2=std::pow((sampleXFadeLoopLength-i)*l, evar);
signed char out=(signed char)(((double)sample->data8[xfadeInput])*f1+((double)sample->data8[xfadeOutput])*f2);
sample->data8[xfadeOutput]=out;
xfadeInput++;
xfadeOutput++;
}
} else if (sample->depth==DIV_SAMPLE_DEPTH_16BIT) {
unsigned int xfadeInput=sample->loopStart-sampleXFadeLoopLength;
unsigned int xfadeOutput=sample->loopEnd-sampleXFadeLoopLength;
for (int i=0;i<sampleXFadeLoopLength;i++) {
double f1=std::pow(i*l,evar);
double f2=std::pow((sampleXFadeLoopLength-i)*l,evar);
short out = (short)(((double)sample->data16[xfadeInput])*f1+((double)sample->data16[xfadeOutput])*f2);
sample->data16[xfadeOutput]=out;
xfadeInput++;
xfadeOutput++;
}
}
updateSampleTex=true;
e->renderSamples(curSample);
});
MARK_MODIFIED;
ImGui::CloseCurrentPopup();
}
ImGui::EndPopup();
}
ImGui::SameLine();
if (ImGui::Button(ICON_FA_PLAY "##PreviewSample")) {
e->previewSample(curSample);
}