audiorecorder.h

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#pragma once
 
#include "audio/recording.h"
#include "config.h"
 
#include <QAudioDevice>
#include <QAudioFormat>
#include <QElapsedTimer>
#include <QIODevice>
#include <QObject>
 
class QAudioSource;
 
[[nodiscard]] QAudioFormat resolveRecordingFormatForConfig(const AudioConfig &config,
                                                          const QAudioFormat &preferredFormat,
                                                          bool requestedFormatSupported,
                                                          QString *errorMessage = nullptr);
 
class AudioBufferDevice final : public QIODevice
{
    Q_OBJECT
 
public:
    explicit AudioBufferDevice(QObject *parent = nullptr);
    ~AudioBufferDevice() override = default;
 
    Q_DISABLE_COPY_MOVE(AudioBufferDevice)
 
    
    void clear();
 
    [[nodiscard]] QByteArray takeBuffer();
 
protected:
    qint64 readData(char *data, qint64 maxSize) override;
 
    qint64 writeData(const char *data, qint64 maxSize) override;
 
private:
    QByteArray m_buffer;
};
 
class AudioRecorder final : public QObject
{
    Q_OBJECT
 
public:
    explicit AudioRecorder(AudioConfig config, QObject *parent = nullptr);
    ~AudioRecorder() override = default;
 
    Q_DISABLE_COPY_MOVE(AudioRecorder)
 
    
    bool start(QString *errorMessage = nullptr);
 
    Recording stop();
 
    [[nodiscard]] bool isRecording() const;
 
private:
    [[nodiscard]] QAudioDevice resolveDevice() const;
 
    QAudioFormat resolveFormat(const QAudioDevice &device, QString *errorMessage) const;
 
    AudioConfig m_config;
    AudioBufferDevice m_buffer;
    QAudioSource *m_audioSource = nullptr;
    QAudioFormat m_activeFormat;
    QElapsedTimer m_elapsed;
};