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Corrected bugs in the oversampler

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This commit is contained in:
Paul Ferrand 2019-12-23 00:07:10 +01:00
parent d6136b6bf9
commit 0784f8ddcd
1 changed files with 11 additions and 5 deletions
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16
src/sfizz/Oversampler.cpp
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@ -102,7 +102,7 @@ void sfz::Oversampler::stream(const sfz::AudioBuffer<float>& input, sfz::AudioBu
case Oversampling::x2:
for (auto& upsampler: upsampler2x)
upsampler.set_coefs(coeffsStage2x.data());
[[fallthrough]];
break;
case Oversampling::x1:
for (int i = 0; i < numChannels; ++i)
copy<float>(input.getConstSpan(i), output.getSpan(i));
@ -123,16 +123,22 @@ void sfz::Oversampler::stream(const sfz::AudioBuffer<float>& input, sfz::AudioBu
const auto thisChunkSize = std::min(chunkSize, numFrames - inputFrameCounter);
const auto outputChunkSize { thisChunkSize * static_cast<int>(factor) };
for (int chanIdx = 0; chanIdx < numChannels; chanIdx++) {
const auto inputChunk = input.getSpan(chanIdx).subspan(inputFrameCounter, chunkSize);
const auto inputChunk = input.getSpan(chanIdx).subspan(inputFrameCounter, thisChunkSize);
const auto outputChunk = output.getSpan(chanIdx).subspan(outputFrameCounter, outputChunkSize);
upsampler2x[chanIdx].process_block(span1.data(), inputChunk.data(), thisChunkSize);
if (factor == Oversampling::x2) {
upsampler2x[chanIdx].process_block(outputChunk.data(), inputChunk.data(), thisChunkSize);
continue;
}
if (factor == Oversampling::x4) {
upsampler2x[chanIdx].process_block(span1.data(), inputChunk.data(), thisChunkSize);
upsampler4x[chanIdx].process_block(outputChunk.data(), span1.data(), thisChunkSize * 2);
continue;
}
else if (factor == Oversampling::x8) {
upsampler2x[chanIdx].process_block(span1.data(), inputChunk.data(), thisChunkSize);
upsampler4x[chanIdx].process_block(span2.data(), span1.data(), thisChunkSize * 2);
upsampler8x[chanIdx].process_block(outputChunk.data(), span1.data(), thisChunkSize * 4);
upsampler8x[chanIdx].process_block(outputChunk.data(), span2.data(), thisChunkSize * 4);
continue;
}
}
inputFrameCounter += thisChunkSize;