AFV initial commit

src/blackcore/afv/audio/output.h

@@ -0,0 +1,65 @@
+#ifndef OUTPUT_H
+#define OUTPUT_H
+
+#include "blacksound/sampleprovider/sampleprovider.h"
+
+#include <QObject>
+#include <QAudioDeviceInfo>
+#include <QAudioOutput>
+
+struct OutputVolumeStreamArgs
+{
+    QAudioDeviceInfo DeviceNumber;
+    float PeakRaw = 0.0;
+    float PeakDB = -1 * std::numeric_limits<float>::infinity();
+    float PeakVU = 0.0;
+};
+
+class AudioOutputBuffer : public QIODevice
+{
+    Q_OBJECT
+
+public:
+    AudioOutputBuffer(ISampleProvider *sampleProvider, QObject *parent = nullptr);
+
+    ISampleProvider *m_sampleProvider = nullptr;
+
+    void setAudioFormat(const QAudioFormat &format) { m_outputFormat = format; }
+
+signals:
+    void outputVolumeStream(const OutputVolumeStreamArgs &args);
+
+protected:
+    virtual qint64 readData(char *data, qint64 maxlen) override;
+    virtual qint64 writeData(const char *data, qint64 len) override;
+
+private:
+    QAudioFormat m_outputFormat;
+
+    float m_maxSampleOutput = 0;
+    int m_sampleCount = 0;
+    const int c_sampleCountPerEvent = 4800;
+    const float maxDb = 0;
+    const float minDb = -40;
+};
+
+class Output : public QObject
+{
+    Q_OBJECT
+public:
+    Output(QObject *parent = nullptr);
+
+    void start(const QAudioDeviceInfo &device, ISampleProvider *sampleProvider);
+    void stop();
+
+signals:
+    void outputVolumeStream(const OutputVolumeStreamArgs &args);
+
+private:
+    bool m_started = false;
+
+    QScopedPointer<QAudioOutput> m_audioOutputCom1;
+    AudioOutputBuffer *m_audioOutputBuffer;
+};
+
+#endif // OUTPUT_H