AudioStream.h

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#pragma once
 
#include <array>
#include <memory>
#include <string>
 
#include <tdme/tdme.h>
#include <tdme/audio/fwd-tdme.h>
#include <tdme/audio/AudioEntity.h>
#include <tdme/utilities/ByteBuffer.h>
 
using std::array;
using std::string;
using std::unique_ptr;
 
using tdme::audio::AudioEntity;
using tdme::utilities::ByteBuffer;
 
/**
 * Audio stream
 * @author Andreas Drewke
 */
class tdme::audio::AudioStream
    : public AudioEntity
{
    friend class Audio;
 
private:
    bool initiated { false };
    array<uint32_t, 2> alBufferIds { 0, 0 };
    uint32_t alSourceId { 0 };
    uint32_t sampleRate { 0 };
    uint8_t channels { 0 };
    unique_ptr<ByteBuffer> data;
    int32_t format { 0 };
    bool playing { false };
 
protected:
    // forbid class copy
    FORBID_CLASS_COPY(AudioStream)
 
    /**
     * Protected constructor
     * @param id id
     */
    inline AudioStream(const string& id): AudioEntity(id) {
        //
    }
 
    /**
     * Destructor
     */
    inline virtual ~AudioStream() {}
 
    // overridden methods
    virtual bool initialize() override;
    virtual void update() override;
    virtual void dispose() override;
 
    /**
     * Fill buffer
     * @param data data
     */
    virtual void fillBuffer(ByteBuffer* data) = 0;
 
public:
    /**
     * Set audio initialization parameters
     * @param sampleRate sample rate
     * @param channels channels
     * @param bufferSize buffer size
     */
    virtual void setParameters(uint32_t sampleRate, uint8_t channels, const int64_t bufferSize = 32768);
 
    // overridden methods
    virtual bool isPlaying() override;
    virtual void rewind() override;
    virtual void play() override;
    virtual void pause() override;
    virtual void stop() override;
 
private:
    /**
     * @return having buffers that are currently played
     */
    bool isPlayingBuffers();
 
    /**
     * Updates properties to Open AL
     */
    void updateProperties();
 
};