| /* |
| * 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) |