1 files changed, 67 insertions, 0 deletions
diff --git a/dom/media/directshow/SampleSink.h b/dom/media/directshow/SampleSink.h
new file mode 100644
index 000000000..6a1af9fee
--- /dev/null
+++ b/dom/media/directshow/SampleSink.h
@@ -0,0 +1,67 @@
+/* -*- 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/. */
+
+#if !defined(SampleSink_h_)
+#define SampleSink_h_
+
+#include "BaseFilter.h"
+#include "DirectShowUtils.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/ReentrantMonitor.h"
+
+namespace mozilla {
+
+class SampleSink {
+public:
+  SampleSink();
+  virtual ~SampleSink();
+
+  // Sets the audio format of the incoming samples. The upstream filter
+  // calls this. This makes a copy.
+  void SetAudioFormat(const WAVEFORMATEX* aInFormat);
+
+  // Copies the format of incoming audio samples into into *aOutFormat.
+  void GetAudioFormat(WAVEFORMATEX* aOutFormat);
+
+  // Called when a sample is delivered by the DirectShow graph to the sink.
+  // The decode thread retrieves the sample by calling WaitForSample().
+  // Blocks if there's already a sample waiting to be consumed by the decode
+  // thread.
+  HRESULT Receive(IMediaSample* aSample);
+
+  // Retrieves a sample from the sample queue, blocking until one becomes
+  // available, or until an error occurs. Returns S_FALSE on EOS.
+  HRESULT Extract(RefPtr<IMediaSample>& aOutSample);
+
+  // Unblocks any threads waiting in GetSample().
+  // Clears mSample, which unblocks upstream stream.
+  void Flush();
+
+  // Opens up the sink to receive more samples in PutSample().
+  // Clears EOS flag.
+  void Reset();
+
+  // Marks that we've reacehd the end of stream.
+  void SetEOS();
+
+  // Returns whether we're at end of stream.
+  bool AtEOS();
+
+private:
+  // All data in this class is syncronized by mMonitor.
+  ReentrantMonitor mMonitor;
+  RefPtr<IMediaSample> mSample;
+
+  // Format of the audio stream we're receiving.
+  WAVEFORMATEX mAudioFormat;
+
+  bool mIsFlushing;
+  bool mAtEOS;
+};
+
+} // namespace mozilla
+
+#endif // SampleSink_h_