1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
* beatmap.h
*
* Created on: 08/dic/2011
* Author: vittorio
*/
#pragma once
#include <QMutex>
#include "proto/beats.pb.h"
#include "track/beats.h"
#define BEAT_MAP_VERSION "BeatMap-1.0"
class Track;
typedef QList<mixxx::track::io::Beat> BeatList;
namespace mixxx {
class BeatMap final : public Beats {
public:
// Construct a BeatMap. iSampleRate may be provided if a more accurate
// sample rate is known than the one associated with the Track.
BeatMap(const Track& track, SINT iSampleRate);
// Construct a BeatMap. iSampleRate may be provided if a more accurate
// sample rate is known than the one associated with the Track. If it is
// zero then the track's sample rate will be used. The BeatMap will be
// deserialized from the byte array.
BeatMap(const Track& track, SINT iSampleRate,
const QByteArray& byteArray);
// Construct a BeatMap. iSampleRate may be provided if a more accurate
// sample rate is known than the one associated with the Track. If it is
// zero then the track's sample rate will be used. A list of beat locations
// in audio frames may be provided.
BeatMap(const Track& track, SINT iSampleRate,
const QVector<double>& beats);
~BeatMap() override = default;
// See method comments in beats.h
Beats::CapabilitiesFlags getCapabilities() const override {
return BEATSCAP_TRANSLATE | BEATSCAP_SCALE | BEATSCAP_ADDREMOVE |
BEATSCAP_MOVEBEAT;
}
QByteArray toByteArray() const override;
BeatsPointer clone() const override;
QString getVersion() const override;
QString getSubVersion() const override;
virtual void setSubVersion(const QString& subVersion);
////////////////////////////////////////////////////////////////////////////
// Beat calculations
////////////////////////////////////////////////////////////////////////////
double findNextBeat(double dSamples) const override;
double findPrevBeat(double dSamples) const override;
bool findPrevNextBeats(double dSamples,
double* dpPrevBeatSamples,
double* dpNextBeatSamples) const override;
double findClosestBeat(double dSamples) const override;
double findNthBeat(double dSamples, int n) const override;
std::unique_ptr<BeatIterator> findBeats(double startSample, double stopSample) const override;
bool hasBeatInRange(double startSample, double stopSample) const override;
double getBpm() const override;
double getBpmRange(double startSample, double stopSample) const override;
double getBpmAroundPosition(double curSample, int n) const override;
////////////////////////////////////////////////////////////////////////////
// Beat mutations
////////////////////////////////////////////////////////////////////////////
void addBeat(double dBeatSample) override;
void removeBeat(double dBeatSample) override;
void translate(double dNumSamples) override;
void scale(enum BPMScale scale) override;
void setBpm(double dBpm) override;
SINT getSampleRate() const override {
return m_iSampleRate;
}
private:
BeatMap(const BeatMap& other);
bool readByteArray(const QByteArray& byteArray);
void createFromBeatVector(const QVector<double>& beats);
void onBeatlistChanged();
double calculateBpm(const mixxx::track::io::Beat& startBeat,
const mixxx::track::io::Beat& stopBeat) const;
// For internal use only.
bool isValid() const;
void scaleDouble();
void scaleTriple();
void scaleQuadruple();
void scaleHalve();
void scaleThird();
void scaleFourth();
mutable QMutex m_mutex;
QString m_subVersion;
SINT m_iSampleRate;
double m_dCachedBpm;
double m_dLastFrame;
BeatList m_beats;
};
} // namespace mixxx
|
