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#include <gtest/gtest.h>
#include <QtDebug>
#include <QScopedPointer>
#include "mixxxtest.h"
#include "control/controlobject.h"
#include "control/controlpushbutton.h"
#include "engine/controls/bpmcontrol.h"
#include "track/beatfactory.h"
#include "track/beatgrid.h"
#include "track/beatmap.h"
#include "track/track.h"
class BpmControlTest : public MixxxTest {
};
TEST_F(BpmControlTest, ShortestPercentageChange) {
const double kEpsilon = 0.0000000001;
EXPECT_NEAR(-0.02, BpmControl::shortestPercentageChange(0.01, 0.99), kEpsilon);
EXPECT_NEAR(0.02, BpmControl::shortestPercentageChange(0.99, 0.01), kEpsilon);
EXPECT_NEAR(0.40, BpmControl::shortestPercentageChange(0.80, 0.20), kEpsilon);
EXPECT_NEAR(-0.40, BpmControl::shortestPercentageChange(0.20, 0.80), kEpsilon);
}
TEST_F(BpmControlTest, BeatContext_BeatGrid) {
const int sampleRate = 44100;
TrackPointer pTrack = Track::newTemporary();
pTrack->setAudioProperties(
mixxx::audio::ChannelCount(2),
mixxx::audio::SampleRate(sampleRate),
mixxx::audio::Bitrate(),
mixxx::Duration::fromSeconds(180));
const double bpm = 60.0;
const int kFrameSize = 2;
const double expectedBeatLength = (60.0 * sampleRate / bpm) * kFrameSize;
const mixxx::BeatsPointer pBeats = BeatFactory::makeBeatGrid(pTrack->getSampleRate(), bpm, 0);
// On a beat.
double prevBeat, nextBeat, beatLength, beatPercentage;
EXPECT_TRUE(BpmControl::getBeatContext(pBeats, 0.0, &prevBeat, &nextBeat,
&beatLength, &beatPercentage));
EXPECT_DOUBLE_EQ(0.0, prevBeat);
EXPECT_DOUBLE_EQ(beatLength, nextBeat);
EXPECT_DOUBLE_EQ(expectedBeatLength, beatLength);
EXPECT_DOUBLE_EQ(0.0, beatPercentage);
}
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