| /* |
| * Copyright (C) 2012, Google 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. |
| */ |
| |
| #ifndef MediaStreamAudioDestinationNode_h |
| #define MediaStreamAudioDestinationNode_h |
| |
| #include "modules/mediastream/MediaStream.h" |
| #include "modules/webaudio/AudioBasicInspectorNode.h" |
| #include "platform/audio/AudioBus.h" |
| #include "wtf/PassRefPtr.h" |
| |
| namespace blink { |
| |
| class BaseAudioContext; |
| |
| class MediaStreamAudioDestinationHandler final |
| : public AudioBasicInspectorHandler { |
| public: |
| static PassRefPtr<MediaStreamAudioDestinationHandler> create( |
| AudioNode&, |
| size_t numberOfChannels); |
| ~MediaStreamAudioDestinationHandler() override; |
| |
| MediaStream* stream() { return m_stream.get(); } |
| |
| // AudioHandler. |
| void process(size_t framesToProcess) override; |
| void setChannelCount(unsigned long, ExceptionState&) override; |
| |
| unsigned long maxChannelCount() const; |
| |
| private: |
| MediaStreamAudioDestinationHandler(AudioNode&, size_t numberOfChannels); |
| // As an audio source, we will never propagate silence. |
| bool propagatesSilence() const override { return false; } |
| |
| // This Persistent doesn't make a reference cycle. |
| Persistent<MediaStream> m_stream; |
| Persistent<MediaStreamSource> m_source; |
| |
| // This internal mix bus is for up/down mixing the input to the actual |
| // number of channels in the destination. |
| RefPtr<AudioBus> m_mixBus; |
| }; |
| |
| class MediaStreamAudioDestinationNode final : public AudioBasicInspectorNode { |
| DEFINE_WRAPPERTYPEINFO(); |
| |
| public: |
| static MediaStreamAudioDestinationNode* create(BaseAudioContext&, |
| size_t numberOfChannels, |
| ExceptionState&); |
| MediaStream* stream() const; |
| |
| private: |
| MediaStreamAudioDestinationNode(BaseAudioContext&, size_t numberOfChannels); |
| }; |
| |
| } // namespace blink |
| |
| #endif // MediaStreamAudioDestinationNode_h |