AudioDestinationCocoa.h [plain text]
#pragma once
#if ENABLE(WEB_AUDIO)
#include "AudioDestination.h"
#include <AudioUnit/AudioUnit.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class AudioBus;
using CreateAudioDestinationCocoaOverride = std::unique_ptr<AudioDestination>(*)(AudioIOCallback&, float sampleRate);
class AudioDestinationCocoa : public AudioDestination {
public:
AudioDestinationCocoa(AudioIOCallback&, float sampleRate);
virtual ~AudioDestinationCocoa();
WEBCORE_EXPORT static CreateAudioDestinationCocoaOverride createOverride;
protected:
void setIsPlaying(bool);
bool isPlaying() final { return m_isPlaying; }
float sampleRate() const final { return m_sampleRate; }
unsigned framesPerBuffer() const final;
AudioUnit& outputUnit() { return m_outputUnit; }
static OSStatus inputProc(void* userData, AudioUnitRenderActionFlags*, const AudioTimeStamp*, UInt32 busNumber, UInt32 numberOfFrames, AudioBufferList* ioData);
void setAudioStreamBasicDescription(AudioStreamBasicDescription&, float sampleRate);
private:
void start() override;
void stop() override;
friend std::unique_ptr<AudioDestination> AudioDestination::create(AudioIOCallback&, const String&, unsigned, unsigned, float);
void configure();
void processBusAfterRender(AudioBus&, UInt32 numberOfFrames);
OSStatus render(const AudioTimeStamp*, UInt32 numberOfFrames, AudioBufferList* ioData);
AudioUnit m_outputUnit;
AudioIOCallback& m_callback;
Ref<AudioBus> m_renderBus;
Ref<AudioBus> m_spareBus;
float m_sampleRate;
bool m_isPlaying { false };
unsigned m_startSpareFrame { 0 };
unsigned m_endSpareFrame { 0 };
};
}
#endif // ENABLE(WEB_AUDIO)