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CoreAudioCaptureSource.h
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CoreAudioCaptureSource.h
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/*
* Copyright (C) 2017-2019 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. ``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
* 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(MEDIA_STREAM)
#include "AudioSession.h"
#include "CAAudioStreamDescription.h"
#include "CaptureDevice.h"
#include "RealtimeMediaSource.h"
#include "RealtimeMediaSourceFactory.h"
#include <AudioToolbox/AudioToolbox.h>
#include <CoreAudio/CoreAudioTypes.h>
#include <wtf/text/WTFString.h>
typedef struct OpaqueCMClock* CMClockRef;
namespace WTF {
class MediaTime;
}
namespace WebCore {
class AudioSampleBufferList;
class AudioSampleDataSource;
class BaseAudioSharedUnit;
class CaptureDeviceInfo;
class WebAudioSourceProviderAVFObjC;
class CoreAudioCaptureSource : public RealtimeMediaSource {
public:
WEBCORE_EXPORT static CaptureSourceOrError create(String&& deviceID, String&& hashSalt, const MediaConstraints*, PageIdentifier);
static CaptureSourceOrError createForTesting(String&& deviceID, AtomString&& label, String&& hashSalt, const MediaConstraints*, BaseAudioSharedUnit& overrideUnit, PageIdentifier);
WEBCORE_EXPORT static AudioCaptureFactory& factory();
CMClockRef timebaseClock();
void handleNewCurrentMicrophoneDevice(const CaptureDevice&);
protected:
CoreAudioCaptureSource(String&& deviceID, AtomString&& label, String&& hashSalt, uint32_t persistentID, BaseAudioSharedUnit*, PageIdentifier);
virtual ~CoreAudioCaptureSource();
BaseAudioSharedUnit& unit();
const BaseAudioSharedUnit& unit() const;
bool canResumeAfterInterruption() const { return m_canResumeAfterInterruption; }
void setCanResumeAfterInterruption(bool value) { m_canResumeAfterInterruption = value; }
private:
friend class BaseAudioSharedUnit;
friend class CoreAudioSharedUnit;
friend class CoreAudioCaptureSourceFactory;
bool isCaptureSource() const final { return true; }
void startProducingData() final;
void stopProducingData() final;
void delaySamples(Seconds) final;
std::optional<Vector<int>> discreteSampleRates() const final { return { { 8000, 16000, 32000, 44100, 48000, 96000 } }; }
const RealtimeMediaSourceCapabilities& capabilities() final;
const RealtimeMediaSourceSettings& settings() final;
void settingsDidChange(OptionSet<RealtimeMediaSourceSettings::Flag>) final;
bool interrupted() const final;
CaptureDevice::DeviceType deviceType() const final { return CaptureDevice::DeviceType::Microphone; }
void initializeToStartProducingData();
void audioUnitWillStart();
#if !RELEASE_LOG_DISABLED
const char* logClassName() const override { return "CoreAudioCaptureSource"; }
#endif
uint32_t m_captureDeviceID { 0 };
std::optional<RealtimeMediaSourceCapabilities> m_capabilities;
std::optional<RealtimeMediaSourceSettings> m_currentSettings;
bool m_canResumeAfterInterruption { true };
bool m_isReadyToStart { false };
BaseAudioSharedUnit* m_overrideUnit { nullptr };
};
class CoreAudioSpeakerSamplesProducer {
public:
virtual ~CoreAudioSpeakerSamplesProducer() = default;
// Main thread
virtual const CAAudioStreamDescription& format() = 0;
virtual void captureUnitIsStarting() = 0;
virtual void captureUnitHasStopped() = 0;
// Background thread.
virtual OSStatus produceSpeakerSamples(size_t sampleCount, AudioBufferList&, uint64_t sampleTime, double hostTime, AudioUnitRenderActionFlags&) = 0;
};
class CoreAudioCaptureSourceFactory : public AudioCaptureFactory, public AudioSession::InterruptionObserver {
public:
WEBCORE_EXPORT static CoreAudioCaptureSourceFactory& singleton();
CoreAudioCaptureSourceFactory();
~CoreAudioCaptureSourceFactory();
void scheduleReconfiguration();
void devicesChanged(const Vector<CaptureDevice>&);
WEBCORE_EXPORT void registerSpeakerSamplesProducer(CoreAudioSpeakerSamplesProducer&);
WEBCORE_EXPORT void unregisterSpeakerSamplesProducer(CoreAudioSpeakerSamplesProducer&);
WEBCORE_EXPORT bool isAudioCaptureUnitRunning();
WEBCORE_EXPORT void whenAudioCaptureUnitIsNotRunning(Function<void()>&&);
void setOverrideUnit(BaseAudioSharedUnit* unit) { m_overrideUnit = unit; }
BaseAudioSharedUnit& unit();
private:
// AudioSession::InterruptionObserver.
void beginAudioSessionInterruption() final { beginInterruption(); }
void endAudioSessionInterruption(AudioSession::MayResume) final { endInterruption(); }
// AudioCaptureFactory
CaptureSourceOrError createAudioCaptureSource(const CaptureDevice&, String&&, const MediaConstraints*, PageIdentifier) override;
CaptureDeviceManager& audioCaptureDeviceManager() final;
const Vector<CaptureDevice>& speakerDevices() const final;
void beginInterruption();
void endInterruption();
BaseAudioSharedUnit* m_overrideUnit { nullptr };
};
inline CaptureSourceOrError CoreAudioCaptureSourceFactory::createAudioCaptureSource(const CaptureDevice& device, String&& hashSalt, const MediaConstraints* constraints, PageIdentifier pageIdentifier)
{
return CoreAudioCaptureSource::create(String { device.persistentId() }, WTFMove(hashSalt), constraints, pageIdentifier);
}
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM)