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Unified Diff: third_party/WebKit/Source/modules/webaudio/AudioWorkletNode.h

Issue 2793593002: AudioWorklet prototype
Patch Set: Merge changes, AudioParam bug fix Created 3 years, 5 months ago
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Index: third_party/WebKit/Source/modules/webaudio/AudioWorkletNode.h
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioWorkletNode.h b/third_party/WebKit/Source/modules/webaudio/AudioWorkletNode.h
new file mode 100644
index 0000000000000000000000000000000000000000..da45d21da4b5dc68cd3cc97b5776705af3aa499f
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webaudio/AudioWorkletNode.h
@@ -0,0 +1,79 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef AudioWorkletNode_h
+#define AudioWorkletNode_h
+
+
+#include "modules/webaudio/AudioNode.h"
+#include "modules/webaudio/AudioParamMap.h"
+#include "modules/webaudio/AudioWorkletProcessor.h"
+#include "platform/wtf/PassRefPtr.h"
+#include "platform/wtf/Threading.h"
+
+namespace blink {
+
+class BaseAudioContext;
+class ExceptionState;
+
+class AudioWorkletHandler final : public AudioHandler {
+ public:
+ static PassRefPtr<AudioWorkletHandler> Create(AudioNode&,
+ float sample_rate,
+ String name);
+
+ ~AudioWorkletHandler() override;
+
+ // AudioHandler
+ void Process(size_t frames_to_process) override;
+
+ // To make it work, as a source node.
+ double TailTime() const override;
+ double LatencyTime() const override;
+
+ // This is used by AudioWorkletMessagingProxy to attach
+ // |AudioWorkletProcessor| instance to this handler.
+ void SetProcessorOnRenderingThread(AudioWorkletProcessor*);
+
+ private:
+ AudioWorkletHandler(AudioNode&, float sample_rate, String name);
+
+ UntracedMember<AudioWorkletProcessor> processor_;
+ HashMap<String, RefPtr<AudioParamHandler>> param_handler_map_;
+};
+
+class AudioWorkletNode final : public AudioNode,
+ public ActiveScriptWrappable<AudioWorkletNode> {
+ DEFINE_WRAPPERTYPEINFO();
+ USING_GARBAGE_COLLECTED_MIXIN(AudioWorkletNode);
+
+ public:
+ static AudioWorkletNode* Create(BaseAudioContext*,
+ const String& name,
+ ExceptionState&);
+
+ AudioParamMap* parameters() const;
+
+ // Called by handler to initialize AudioParamMap. This is only invoked when
+ // the node instantiation phase, and should never be used afterward.
+ void SetParameterMap(AudioParamMap*);
+
+ AudioWorkletHandler& GetWorkletHandler() const;
+
+ // ScriptWrappable
+ bool HasPendingActivity() const final;
+
+ DECLARE_VIRTUAL_TRACE();
+
+ private:
+ AudioWorkletNode(BaseAudioContext&, const String& name);
+
+ String name_;
+
+ Member<AudioParamMap> parameter_map_;
+};
+
+} // namespace blink
+
+#endif // AudioWorkletNode_h

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