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/*
* 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 THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_MEDIA_STREAM_AUDIO_SOURCE_NODE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_MEDIA_STREAM_AUDIO_SOURCE_NODE_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/modules/mediastream/media_stream.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node.h"
#include "third_party/blink/renderer/platform/audio/audio_source_provider.h"
#include "third_party/blink/renderer/platform/audio/audio_source_provider_client.h"
#include "third_party/blink/renderer/platform/wtf/threading.h"
namespace blink {
class AudioContext;
class MediaStreamAudioSourceOptions;
class MediaStreamAudioSourceHandler final : public AudioHandler {
public:
static scoped_refptr<MediaStreamAudioSourceHandler> Create(
AudioNode&,
std::unique_ptr<AudioSourceProvider>);
~MediaStreamAudioSourceHandler() override;
// AudioHandler
void Process(uint32_t frames_to_process) override;
void SetFormat(uint32_t number_of_channels, float sample_rate);
double TailTime() const override { return 0; }
double LatencyTime() const override { return 0; }
bool RequiresTailProcessing() const final { return false; }
private:
MediaStreamAudioSourceHandler(AudioNode&,
std::unique_ptr<AudioSourceProvider>);
// AudioHandler: MediaStreamAudioSourceNode never propagates silence.
bool PropagatesSilence() const override { return false; }
std::unique_ptr<AudioSourceProvider> audio_source_provider_;
// Protects |source_number_of_channels_|.
Mutex process_lock_;
unsigned source_number_of_channels_ = 0;
};
// -----------------------------------------------------------------------------
class MediaStreamAudioSourceNode final
: public AudioNode,
public AudioSourceProviderClient,
public ActiveScriptWrappable<MediaStreamAudioSourceNode> {
DEFINE_WRAPPERTYPEINFO();
public:
static MediaStreamAudioSourceNode* Create(AudioContext&,
MediaStream&,
ExceptionState&);
static MediaStreamAudioSourceNode* Create(
AudioContext*, const MediaStreamAudioSourceOptions*, ExceptionState&);
MediaStreamAudioSourceNode(AudioContext&,
MediaStream&,
MediaStreamTrack*,
std::unique_ptr<AudioSourceProvider>);
// V8 binding
MediaStream* getMediaStream() const { return media_stream_; }
// AudioSourceProviderClient
void SetFormat(uint32_t number_of_channels, float sample_rate) override;
// InspectorHelperMixin
void ReportDidCreate() final;
void ReportWillBeDestroyed() final;
// GC
bool HasPendingActivity() const final;
void Trace(Visitor*) const override;
private:
MediaStreamAudioSourceHandler& GetMediaStreamAudioSourceHandler() const;
Member<MediaStreamTrack> audio_track_;
Member<MediaStream> media_stream_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_MEDIA_STREAM_AUDIO_SOURCE_NODE_H_
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