blob: fe6947eb82238fdf6521d6577e389ed68f8a2247 [file] [log] [blame]
/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#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);
// An AudioDestination using CoreAudio's default output AudioUnit
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; }
AudioUnit& outputUnit() { return m_outputUnit; }
// DefaultOutputUnit callback
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(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 };
};
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)