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diff --git a/media/gmp-clearkey/0.1/VideoDecoder.h b/media/gmp-clearkey/0.1/VideoDecoder.h
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+++ b/media/gmp-clearkey/0.1/VideoDecoder.h
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+/*
+ * Copyright 2013, Mozilla Foundation and contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __VideoDecoder_h__
+#define __VideoDecoder_h__
+
+// This include is required in order for content_decryption_module to work
+// on Unix systems.
+#include <stddef.h>
+
+#include <atomic>
+#include <queue>
+#include <thread>
+
+#include "content_decryption_module.h"
+#include "WMFH264Decoder.h"
+
+class VideoDecoder : public RefCounted {
+ public:
+  explicit VideoDecoder(cdm::Host_10* aHost);
+
+  cdm::Status InitDecode(const cdm::VideoDecoderConfig_2& aConfig);
+
+  cdm::Status Decode(const cdm::InputBuffer_2& aEncryptedBuffer,
+                     cdm::VideoFrame* aVideoFrame);
+
+  void Reset();
+
+  void DecodingComplete();
+
+  bool HasShutdown() { return mHasShutdown; }
+
+ private:
+  virtual ~VideoDecoder();
+
+  cdm::Status Drain(cdm::VideoFrame* aVideoFrame);
+
+  struct DecodeData {
+    std::vector<uint8_t> mBuffer;
+    uint64_t mTimestamp = 0;
+    CryptoMetaData mCrypto;
+  };
+
+  cdm::Status OutputFrame(cdm::VideoFrame* aVideoFrame);
+
+  HRESULT SampleToVideoFrame(IMFSample* aSample, int32_t aPictureWidth,
+                             int32_t aPictureHeight, int32_t aStride,
+                             int32_t aFrameHeight,
+                             cdm::VideoFrame* aVideoFrame);
+
+  cdm::Host_10* mHost;
+  wmf::AutoPtr<wmf::WMFH264Decoder> mDecoder;
+
+  std::queue<wmf::CComPtr<IMFSample>> mOutputQueue;
+
+  bool mHasShutdown;
+};
+
+#endif  // __VideoDecoder_h__