80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
#pragma once
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#include <memory>
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#include <list>
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#include <vector>
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#include <atomic>
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#include <QIODevice>
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#include <QAudioOutput>
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class QThread;
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namespace Xybrid::Data {
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class Project;
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}
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namespace Xybrid::Audio {
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class AudioEngine : public QIODevice {
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Q_OBJECT
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explicit AudioEngine(QObject *parent = nullptr);
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public:
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enum PlaybackMode {
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Stopped, // stopped
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Playing, // playing track
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Paused, // paused during playback
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Previewing, // instrument live preview
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Rendering, // rendering to file
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};
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private:
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QThread* thread;
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std::unique_ptr<QAudioOutput> output;
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int sampleRate = 48000;
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std::vector<float> buffer[2];
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size_t bufPos = 0;
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static const constexpr size_t tickBufSize = (1024*1024*5); // 5mb should be enough
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std::unique_ptr<int[]> tickBuf;
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std::atomic<int*> tickBufPtr;
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int* tickBufEnd;
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PlaybackMode mode = Stopped;
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size_t tickId = 0;
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std::shared_ptr<Data::Project> project;
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// playback timing and position
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float tempo = 140.0;
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int seqPos;
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int curRow;
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int curTick;
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double tickAcc; // accumulator for tick remainder
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void postInit();
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void initAudio(bool startNow = false);
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void deinitAudio();
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void nextTick();
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public:
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static void init();
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inline constexpr PlaybackMode playbackMode() const { return mode; }
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inline constexpr const std::shared_ptr<Data::Project>& playingProject() const { return project; }
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void play(std::shared_ptr<Data::Project>);
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void stop();
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void* tickAlloc(size_t size);
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inline size_t curTickSize() { return buffer[0].size(); }
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// QIODevice functions
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qint64 readData(char* data, qint64 maxlen) override;
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qint64 writeData(const char*, qint64) override { return 0; }
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qint64 bytesAvailable() const override { return 0; } // not actually used by QAudioOutput
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volatile int note = 12*5;
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signals:
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void playbackModeChanged();
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public slots:
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};
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extern AudioEngine* audioEngine;
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}
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