Beats: Add mixxx::Bpm in BeatUtils and BeatGrid/BeatMap classes

src/analyzer/analyzerbeats.cpp

@@ -230,7 +230,7 @@ void AnalyzerBeats::storeResults(TrackPointer pTrack) {
         qDebug() << "AnalyzerBeats plugin detected" << beats.size()
                  << "beats. Average BPM:" << (pBeats ? pBeats->getBpm() : 0.0);
     } else {
-        float bpm = m_pPlugin->getBpm();
+        mixxx::Bpm bpm = m_pPlugin->getBpm();
         qDebug() << "AnalyzerBeats plugin detected constant BPM: " << bpm;
         pBeats = BeatFactory::makeBeatGrid(m_sampleRate, bpm, mixxx::audio::kStartFramePos);
     }

src/analyzer/plugins/analyzerplugin.h

@@ -4,6 +4,7 @@
 
 #include "audio/frame.h"
 #include "track/beats.h"
+#include "track/bpm.h"
 #include "track/keys.h"
 #include "util/types.h"
 
@@ -69,8 +70,8 @@ class AnalyzerBeatsPlugin : public AnalyzerPlugin {
     ~AnalyzerBeatsPlugin() override = default;
 
     virtual bool supportsBeatTracking() const = 0;
-    virtual float getBpm() const {
-        return 0.0f;
+    virtual mixxx::Bpm getBpm() const {
+        return mixxx::Bpm();
     }
     virtual QVector<mixxx::audio::FramePos> getBeats() const {
         return {};

src/analyzer/plugins/analyzersoundtouchbeats.cpp

@@ -8,15 +8,14 @@
 namespace mixxx {
 
 AnalyzerSoundTouchBeats::AnalyzerSoundTouchBeats()
-        : m_downmixBuffer(kAnalysisFramesPerChunk), // mono, i.e. 1 sample per frame
-          m_fResultBpm(0.0f) {
+        : m_downmixBuffer(kAnalysisFramesPerChunk) {
 }
 
 AnalyzerSoundTouchBeats::~AnalyzerSoundTouchBeats() {
 }
 
 bool AnalyzerSoundTouchBeats::initialize(int samplerate) {
-    m_fResultBpm = 0.0f;
+    m_resultBpm = mixxx::Bpm();
     m_pSoundTouch = std::make_unique<soundtouch::BPMDetect>(2, samplerate);
     return true;
 }
@@ -42,7 +41,7 @@ bool AnalyzerSoundTouchBeats::finalize() {
     if (!m_pSoundTouch) {
         return false;
     }
-    m_fResultBpm = m_pSoundTouch->getBpm();
+    m_resultBpm = mixxx::Bpm(m_pSoundTouch->getBpm());
     m_pSoundTouch.reset();
     return true;
 }

src/analyzer/plugins/analyzersoundtouchbeats.h

@@ -37,14 +37,15 @@ class AnalyzerSoundTouchBeats : public AnalyzerBeatsPlugin {
         return false;
     }
 
-    float getBpm() const override {
-        return m_fResultBpm;
+    mixxx::Bpm getBpm() const override {
+        return m_resultBpm;
     }
 
   private:
     std::unique_ptr<soundtouch::BPMDetect> m_pSoundTouch;
+    /// mono, i.e. 1 sample per frame
     SampleBuffer m_downmixBuffer;
-    float m_fResultBpm;
+    mixxx::Bpm m_resultBpm;
 };
 
 } // namespace mixxx

src/engine/controls/bpmcontrol.cpp

@@ -174,10 +174,10 @@ void BpmControl::adjustBeatsBpm(double deltaBpm) {
     const mixxx::BeatsPointer pBeats = pTrack->getBeats();
     if (pBeats && (pBeats->getCapabilities() & mixxx::Beats::BEATSCAP_SETBPM)) {
         double bpm = pBeats->getBpm();
-        double centerBpm = math_max(kBpmAdjustMin, bpm + deltaBpm);
-        double adjustedBpm = BeatUtils::roundBpmWithinRange(
+        const auto centerBpm = mixxx::Bpm(math_max(kBpmAdjustMin, bpm + deltaBpm));
+        mixxx::Bpm adjustedBpm = BeatUtils::roundBpmWithinRange(
                 centerBpm - kBpmAdjustStep / 2, centerBpm, centerBpm + kBpmAdjustStep / 2);
-        pTrack->trySetBeats(pBeats->setBpm(adjustedBpm));
+        pTrack->trySetBeats(pBeats->setBpm(adjustedBpm.getValue()));
     }
 }
 
@@ -257,11 +257,11 @@ void BpmControl::slotTapFilter(double averageLength, int numSamples) {
 
     // (60 seconds per minute) * (1000 milliseconds per second) / (X millis per
     // beat) = Y beats/minute
-    double averageBpm = 60.0 * 1000.0 / averageLength / rateRatio;
+    auto averageBpm = mixxx::Bpm(60.0 * 1000.0 / averageLength / rateRatio);
     averageBpm = BeatUtils::roundBpmWithinRange(averageBpm - kBpmTabRounding,
             averageBpm,
             averageBpm + kBpmTabRounding);
-    pTrack->trySetBeats(pBeats->setBpm(averageBpm));
+    pTrack->trySetBeats(pBeats->setBpm(averageBpm.getValue()));
 }
 
 void BpmControl::slotControlBeatSyncPhase(double value) {

src/library/dao/trackdao.cpp

@@ -1240,7 +1240,7 @@ bool setTrackAudioProperties(
 
 bool setTrackBeats(const QSqlRecord& record, const int column,
                    TrackPointer pTrack) {
-    double bpm = record.value(column).toDouble();
+    const auto bpm = mixxx::Bpm(record.value(column).toDouble());
     QString beatsVersion = record.value(column + 1).toString();
     QString beatsSubVersion = record.value(column + 2).toString();
     QByteArray beatsBlob = record.value(column + 3).toByteArray();

src/library/dlgtrackinfo.cpp

@@ -44,7 +44,6 @@ DlgTrackInfo::DlgTrackInfo(
         : QDialog(nullptr),
           m_pTrackModel(trackModel),
           m_tapFilter(this, kFilterLength, kMaxInterval),
-          m_dLastTapedBpm(-1.),
           m_pWCoverArtLabel(make_parented<WCoverArtLabel>(this)),
           m_pWStarRating(make_parented<WStarRating>(nullptr, this)) {
     init();
@@ -583,7 +582,7 @@ void DlgTrackInfo::slotBpmConstChanged(int state) {
             CuePosition cue = m_pLoadedTrack->getCuePoint();
             m_pBeatsClone =
                     BeatFactory::makeBeatGrid(m_pLoadedTrack->getSampleRate(),
-                            spinBpm->value(),
+                            mixxx::Bpm(spinBpm->value()),
                             mixxx::audio::FramePos::fromEngineSamplePos(
                                     cue.getPosition()));
         } else {
@@ -602,18 +601,19 @@ void DlgTrackInfo::slotBpmTap(double averageLength, int numSamples) {
     if (averageLength == 0) {
         return;
     }
-    double averageBpm = 60.0 * 1000.0 / averageLength;
+    auto averageBpm = mixxx::Bpm(60.0 * 1000.0 / averageLength);
     averageBpm = BeatUtils::roundBpmWithinRange(averageBpm - kBpmTabRounding,
             averageBpm,
             averageBpm + kBpmTabRounding);
-    if (averageBpm != m_dLastTapedBpm) {
-        m_dLastTapedBpm = averageBpm;
-        spinBpm->setValue(averageBpm);
+    if (averageBpm != m_lastTapedBpm) {
+        m_lastTapedBpm = averageBpm;
+        spinBpm->setValue(averageBpm.getValue());
     }
 }
 
 void DlgTrackInfo::slotSpinBpmValueChanged(double value) {
-    if (value <= 0) {
+    const auto bpm = mixxx::Bpm(value);
+    if (!bpm.hasValue()) {
         m_pBeatsClone.clear();
         return;
     }
@@ -622,17 +622,17 @@ void DlgTrackInfo::slotSpinBpmValueChanged(double value) {
         CuePosition cue = m_pLoadedTrack->getCuePoint();
         m_pBeatsClone = BeatFactory::makeBeatGrid(
                 m_pLoadedTrack->getSampleRate(),
-                value,
+                bpm,
                 mixxx::audio::FramePos::fromEngineSamplePos(cue.getPosition()));
     }
 
     double oldValue = m_pBeatsClone->getBpm();
-    if (oldValue == value) {
+    if (oldValue == bpm.getValue()) {
         return;
     }
 
     if (m_pBeatsClone->getCapabilities() & mixxx::Beats::BEATSCAP_SETBPM) {
-        m_pBeatsClone = m_pBeatsClone->setBpm(value);
+        m_pBeatsClone = m_pBeatsClone->setBpm(bpm.getValue());
     }
 
     // read back the actual value

src/library/dlgtrackinfo.h

@@ -115,7 +115,7 @@ class DlgTrackInfo : public QDialog, public Ui::DlgTrackInfo {
     bool m_trackHasBeatMap;
 
     TapFilter m_tapFilter;
-    double m_dLastTapedBpm;
+    mixxx::Bpm m_lastTapedBpm;
 
     parented_ptr<WCoverArtLabel> m_pWCoverArtLabel;
     parented_ptr<WStarRating> m_pWStarRating;

src/test/beatgridtest.cpp

@@ -26,12 +26,12 @@ TEST(BeatGridTest, Scale) {
     int sampleRate = 44100;
     TrackPointer pTrack = newTrack(sampleRate);
 
-    double bpm = 60.0;
+    const auto bpm = 60.0;
     pTrack->trySetBpm(bpm);
 
     auto pGrid = BeatGrid::makeBeatGrid(pTrack->getSampleRate(),
             QString(),
-            bpm,
+            mixxx::Bpm(bpm),
             mixxx::audio::kStartFramePos);
 
     EXPECT_DOUBLE_EQ(bpm, pGrid->getBpm());
@@ -65,7 +65,7 @@ TEST(BeatGridTest, TestNthBeatWhenOnBeat) {
 
     auto pGrid = BeatGrid::makeBeatGrid(pTrack->getSampleRate(),
             QString(),
-            bpm,
+            mixxx::Bpm(bpm),
             mixxx::audio::kStartFramePos);
     // Pretend we're on the 20th beat;
     double position = beatLength * 20;
@@ -107,7 +107,7 @@ TEST(BeatGridTest, TestNthBeatWhenOnBeat_BeforeEpsilon) {
 
     auto pGrid = BeatGrid::makeBeatGrid(pTrack->getSampleRate(),
             QString(),
-            bpm,
+            mixxx::Bpm(bpm),
             mixxx::audio::kStartFramePos);
 
     // Pretend we're just before the 20th beat.
@@ -151,7 +151,7 @@ TEST(BeatGridTest, TestNthBeatWhenOnBeat_AfterEpsilon) {
 
     auto pGrid = BeatGrid::makeBeatGrid(pTrack->getSampleRate(),
             QString(),
-            bpm,
+            mixxx::Bpm(bpm),
             mixxx::audio::kStartFramePos);
 
     // Pretend we're just before the 20th beat.
@@ -188,10 +188,10 @@ TEST(BeatGridTest, TestNthBeatWhenNotOnBeat) {
     int sampleRate = 44100;
     TrackPointer pTrack = newTrack(sampleRate);
 
-    double bpm = 60.1;
+    const auto bpm = mixxx::Bpm(60.1);
     const int kFrameSize = 2;
-    pTrack->trySetBpm(bpm);
-    double beatLength = (60.0 * sampleRate / bpm) * kFrameSize;
+    pTrack->trySetBpm(bpm.getValue());
+    double beatLength = (60.0 * sampleRate / bpm.getValue()) * kFrameSize;
 
     auto pGrid = BeatGrid::makeBeatGrid(pTrack->getSampleRate(),
             QString(),
@@ -229,12 +229,12 @@ TEST(BeatGridTest, FromMetadata) {
     int sampleRate = 44100;
     TrackPointer pTrack = newTrack(sampleRate);
 
-    double bpm = 60.1;
-    ASSERT_TRUE(pTrack->trySetBpm(bpm));
-    EXPECT_DOUBLE_EQ(pTrack->getBpm(), bpm);
+    const auto bpm = mixxx::Bpm(60.1);
+    ASSERT_TRUE(pTrack->trySetBpm(bpm.getValue()));
+    EXPECT_DOUBLE_EQ(pTrack->getBpm(), bpm.getValue());
 
     auto pBeats = pTrack->getBeats();
-    EXPECT_DOUBLE_EQ(pBeats->getBpm(), bpm);
+    EXPECT_DOUBLE_EQ(pBeats->getBpm(), bpm.getValue());
 
     // Invalid bpm resets the bpm
     ASSERT_TRUE(pTrack->trySetBpm(-60.1));

src/test/beatstranslatetest.cpp

@@ -7,7 +7,7 @@ class BeatsTranslateTest : public MockedEngineBackendTest {
 
 TEST_F(BeatsTranslateTest, SimpleTranslateMatch) {
     // Set up BeatGrids for decks 1 and 2.
-    const double bpm = 60.0;
+    const auto bpm = mixxx::Bpm(60.0);
     constexpr auto firstBeat = mixxx::audio::kStartFramePos;
     auto grid1 = mixxx::BeatGrid::makeBeatGrid(
             m_pTrack1->getSampleRate(), QString(), bpm, firstBeat);
@@ -33,8 +33,8 @@ TEST_F(BeatsTranslateTest, SimpleTranslateMatch) {
     // doesn't get set naturally, but this will do for now.
     auto pBpm1 = std::make_unique<ControlProxy>(m_sGroup1, "bpm");
     auto pBpm2 = std::make_unique<ControlProxy>(m_sGroup1, "bpm");
-    pBpm1->set(bpm);
-    pBpm2->set(bpm);
+    pBpm1->set(bpm.getValue());
+    pBpm2->set(bpm.getValue());
     ProcessBuffer();
 
     // Push the button on deck 2.

src/test/bpmcontrol_test.cpp

@@ -33,9 +33,9 @@ TEST_F(BpmControlTest, BeatContext_BeatGrid) {
             mixxx::audio::Bitrate(),
             mixxx::Duration::fromSeconds(180));
 
-    const double bpm = 60.0;
+    const auto bpm = mixxx::Bpm(60.0);
     const int kFrameSize = 2;
-    const double expectedBeatLength = (60.0 * sampleRate / bpm) * kFrameSize;
+    const double expectedBeatLength = (60.0 * sampleRate / bpm.getValue()) * kFrameSize;
 
     const mixxx::BeatsPointer pBeats = BeatFactory::makeBeatGrid(
             pTrack->getSampleRate(), bpm, mixxx::audio::kStartFramePos);