| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #if ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM) |
| |
| #include "AudioNode.h" |
| #include "AudioSourceProviderClient.h" |
| #include "MediaStream.h" |
| #include "MultiChannelResampler.h" |
| #include <wtf/Lock.h> |
| |
| namespace WebCore { |
| |
| class AudioContext; |
| class MultiChannelResampler; |
| |
| class MediaStreamAudioSourceNode : public AudioNode, public AudioSourceProviderClient { |
| public: |
| static Ref<MediaStreamAudioSourceNode> create(AudioContext&, MediaStream&, MediaStreamTrack&); |
| |
| virtual ~MediaStreamAudioSourceNode(); |
| |
| MediaStream* mediaStream() { return &m_mediaStream.get(); } |
| |
| // AudioNode |
| void process(size_t framesToProcess) override; |
| void reset() override { } |
| |
| // AudioSourceProviderClient |
| void setFormat(size_t numberOfChannels, float sampleRate) override; |
| |
| private: |
| MediaStreamAudioSourceNode(AudioContext&, MediaStream&, MediaStreamTrack&); |
| |
| double tailTime() const override { return 0; } |
| double latencyTime() const override { return 0; } |
| |
| // As an audio source, we will never propagate silence. |
| bool propagatesSilence() const override { return false; } |
| |
| Ref<MediaStream> m_mediaStream; |
| Ref<MediaStreamTrack> m_audioTrack; |
| std::unique_ptr<MultiChannelResampler> m_multiChannelResampler; |
| |
| Lock m_processMutex; |
| |
| unsigned m_sourceNumberOfChannels { 0 }; |
| double m_sourceSampleRate { 0 }; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WEB_AUDIO) && ENABLE(MEDIA_STREAM) |