1 files changed, 129 insertions, 0 deletions
diff --git a/dom/media/webaudio/AudioBufferSourceNode.h b/dom/media/webaudio/AudioBufferSourceNode.h
new file mode 100644
index 0000000000..9a3861555c
--- /dev/null
+++ b/dom/media/webaudio/AudioBufferSourceNode.h
@@ -0,0 +1,129 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef AudioBufferSourceNode_h_
+#define AudioBufferSourceNode_h_
+
+#include "AudioScheduledSourceNode.h"
+#include "AudioBuffer.h"
+
+namespace mozilla::dom {
+
+struct AudioBufferSourceOptions;
+class AudioParam;
+
+class AudioBufferSourceNode final : public AudioScheduledSourceNode,
+                                    public MainThreadMediaTrackListener {
+ public:
+  static already_AddRefed<AudioBufferSourceNode> Create(
+      JSContext* aCx, AudioContext& aAudioContext,
+      const AudioBufferSourceOptions& aOptions);
+
+  void DestroyMediaTrack() override;
+
+  uint16_t NumberOfInputs() const final { return 0; }
+  AudioBufferSourceNode* AsAudioBufferSourceNode() override { return this; }
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioBufferSourceNode,
+                                           AudioScheduledSourceNode)
+
+  static already_AddRefed<AudioBufferSourceNode> Constructor(
+      const GlobalObject& aGlobal, AudioContext& aAudioContext,
+      const AudioBufferSourceOptions& aOptions) {
+    return Create(aGlobal.Context(), aAudioContext, aOptions);
+  }
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  void Start(double aWhen, double aOffset, const Optional<double>& aDuration,
+             ErrorResult& aRv);
+
+  void Start(double aWhen, ErrorResult& aRv) override;
+  void Stop(double aWhen, ErrorResult& aRv) override;
+
+  AudioBuffer* GetBuffer(JSContext* aCx) const { return mBuffer; }
+  void SetBuffer(JSContext* aCx, AudioBuffer* aBuffer, ErrorResult& aRv) {
+    if (aBuffer && mBufferSet) {
+      aRv.ThrowInvalidStateError(
+          "Cannot set the buffer attribute of an AudioBufferSourceNode "
+          "with an AudioBuffer more than once");
+      return;
+    }
+    if (aBuffer) {
+      mBufferSet = true;
+    }
+    mBuffer = aBuffer;
+    SendBufferParameterToTrack(aCx);
+    SendLoopParametersToTrack();
+  }
+  AudioParam* PlaybackRate() const { return mPlaybackRate; }
+  AudioParam* Detune() const { return mDetune; }
+  bool Loop() const { return mLoop; }
+  void SetLoop(bool aLoop) {
+    mLoop = aLoop;
+    SendLoopParametersToTrack();
+  }
+  double LoopStart() const { return mLoopStart; }
+  void SetLoopStart(double aStart) {
+    mLoopStart = aStart;
+    SendLoopParametersToTrack();
+  }
+  double LoopEnd() const { return mLoopEnd; }
+  void SetLoopEnd(double aEnd) {
+    mLoopEnd = aEnd;
+    SendLoopParametersToTrack();
+  }
+  void NotifyMainThreadTrackEnded() override;
+
+  const char* NodeType() const override { return "AudioBufferSourceNode"; }
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
+
+ private:
+  explicit AudioBufferSourceNode(AudioContext* aContext);
+  ~AudioBufferSourceNode() = default;
+
+  friend class AudioBufferSourceNodeEngine;
+  // START is sent during Start().
+  // STOP is sent during Stop().
+  // BUFFERSTART and DURATION are sent when SetBuffer() and Start() have
+  // been called (along with sending the buffer).
+  enum EngineParameters {
+    SAMPLE_RATE,
+    START,
+    STOP,
+    // BUFFERSTART is the "offset" passed to start(), multiplied by
+    // buffer.sampleRate.
+    BUFFERSTART,
+    DURATION,
+    LOOP,
+    LOOPSTART,
+    LOOPEND,
+    PLAYBACKRATE,
+    DETUNE
+  };
+
+  void SendLoopParametersToTrack();
+  void SendBufferParameterToTrack(JSContext* aCx);
+  void SendOffsetAndDurationParametersToTrack(AudioNodeTrack* aTrack);
+
+  double mLoopStart;
+  double mLoopEnd;
+  double mOffset;
+  double mDuration;
+  RefPtr<AudioBuffer> mBuffer;
+  RefPtr<AudioParam> mPlaybackRate;
+  RefPtr<AudioParam> mDetune;
+  bool mLoop;
+  bool mStartCalled;
+  bool mBufferSet;
+};
+
+}  // namespace mozilla::dom
+
+#endif