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Cue Frame Refactoring #4069

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merged 8 commits into from
Jul 7, 2021
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@Holzhaus Holzhaus commented Jul 7, 2021

This duplicates the Cue related methods in order to support Frame positions. This allows migrating the individual parts of the code individually instead of all at once. The original sample-based methods will be removed in #4061.

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Some findings

}

TEST_F(AnalyzerSilenceTest, EndToEndToneTrack) {
// Fill the entire buffer with 1 kHz tone
double omega = 2.0 * M_PI * kTonePitchHz / pTrack->getSampleRate();
for (int i = 0; i < nTrackSampleDataLength; i++) {
pTrackSampleData[i] = static_cast<CSAMPLE>(cos(i / kChannelCount * omega));
pTrackSampleData[i] = static_cast<CSAMPLE>(cos(i * kChannelCount * omega));
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This looks suspicious. Why did the division become a multiplication? And if it is wrong then why does this not affect the result of the test?

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Good catch, must have been slipped in while I was doing a regex replace and wasn't careful enough.

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I reverted and amended the original commit. But it makes no difference for the test result.

src/test/analyzersilence_test.cpp Outdated Show resolved Hide resolved
src/test/analyzersilence_test.cpp Outdated Show resolved Hide resolved
src/test/analyzersilence_test.cpp Outdated Show resolved Hide resolved
mixxx::audio::SampleRate sampleRate) {
VERIFY_OR_DEBUG_ASSERT(sampleRate.isValid()) {
return std::nullopt;
}
if (positionSamples == Cue::kNoPosition) {
if (!position.isValid()) {
return std::nullopt;
}
// Try to avoid rounding errors
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Does this comment still apply? I guess it referred to limiting the number of divisions.

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@Holzhaus Holzhaus Jul 7, 2021

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Ok. I removed the comment. c86cbb6

src/track/cue.h Outdated
void setStartPosition(mixxx::audio::FramePos position);
void setStartPosition(double samplePosition) {
mixxx::audio::FramePos position;
if (samplePosition != Cue::kNoPosition) {
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Why not reuse fromEngineSamplePosMaybeInvalid() here and all other legacy adapter functions? This would require a static assertion that Cue::kNoPosition == kLegacyInvalidEnginePosition (which already exists as I just noticed).

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if (!position.isValid()) {
return {};
}
return {position.toEngineSamplePos()};
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Why do you use fromEngineSamplePosMaybeInvalid() (see below) but not toEngineSamplePosMaybeInvalid() here?

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@Holzhaus Holzhaus force-pushed the frame-refactor-prerequisites branch from e9d76d8 to 902e4a8 Compare July 7, 2021 22:31
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Holzhaus commented Jul 7, 2021

@uklotzde Sorry for the force push, I only reverted the unintended analyzersilencetest changes.

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LGTM

@uklotzde uklotzde merged commit 13696bc into mixxxdj:main Jul 7, 2021
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Holzhaus commented Jul 8, 2021

Sorry for the PR flood, but the main reason for adding both FramePos-based and samplepos-based methods was that all changes in related code can be done independently and we can keep each PR reasonably small.

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