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diff --git a/webrtc/modules/video_coding/generic_decoder.h b/webrtc/modules/video_coding/generic_decoder.h
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+++ b/webrtc/modules/video_coding/generic_decoder.h
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+/*
+ *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_VIDEO_CODING_GENERIC_DECODER_H_
+#define WEBRTC_MODULES_VIDEO_CODING_GENERIC_DECODER_H_
+
+#include "webrtc/modules/include/module_common_types.h"
+#include "webrtc/modules/video_coding/include/video_codec_interface.h"
+#include "webrtc/modules/video_coding/encoded_frame.h"
+#include "webrtc/modules/video_coding/timestamp_map.h"
+#include "webrtc/modules/video_coding/timing.h"
+
+namespace webrtc {
+
+class VCMReceiveCallback;
+
+enum { kDecoderFrameMemoryLength = 10 };
+
+struct VCMFrameInformation {
+  int64_t renderTimeMs;
+  int64_t decodeStartTimeMs;
+  void* userData;
+  VideoRotation rotation;
+};
+
+class VCMDecodedFrameCallback : public DecodedImageCallback {
+ public:
+  VCMDecodedFrameCallback(VCMTiming* timing, Clock* clock);
+    virtual ~VCMDecodedFrameCallback();
+    void SetUserReceiveCallback(VCMReceiveCallback* receiveCallback);
+    VCMReceiveCallback* UserReceiveCallback();
+
+    virtual int32_t Decoded(VideoFrame& decodedImage);  // NOLINT
+    virtual int32_t Decoded(VideoFrame& decodedImage,   // NOLINT
+                            int64_t decode_time_ms);
+    virtual int32_t ReceivedDecodedReferenceFrame(const uint64_t pictureId);
+    virtual int32_t ReceivedDecodedFrame(const uint64_t pictureId);
+
+    uint64_t LastReceivedPictureID() const;
+    void OnDecoderImplementationName(const char* implementation_name);
+
+    void Map(uint32_t timestamp, VCMFrameInformation* frameInfo);
+    int32_t Pop(uint32_t timestamp);
+
+ private:
+    // Protect |_receiveCallback| and |_timestampMap|.
+    CriticalSectionWrapper* _critSect;
+    Clock* _clock;
+    VCMReceiveCallback* _receiveCallback GUARDED_BY(_critSect);
+    VCMTiming* _timing;
+    VCMTimestampMap _timestampMap GUARDED_BY(_critSect);
+    uint64_t _lastReceivedPictureID;
+};
+
+class VCMGenericDecoder {
+  friend class VCMCodecDataBase;
+
+ public:
+  explicit VCMGenericDecoder(VideoDecoder* decoder, bool isExternal = false);
+  ~VCMGenericDecoder();
+
+  /**
+  * Initialize the decoder with the information from the VideoCodec
+  */
+  int32_t InitDecode(const VideoCodec* settings, int32_t numberOfCores);
+
+  /**
+  * Decode to a raw I420 frame,
+  *
+  * inputVideoBuffer reference to encoded video frame
+  */
+  int32_t Decode(const VCMEncodedFrame& inputFrame, int64_t nowMs);
+
+  /**
+  * Free the decoder memory
+  */
+  int32_t Release();
+
+  /**
+  * Reset the decoder state, prepare for a new call
+  */
+  int32_t Reset();
+
+  /**
+  * Set decode callback. Deregistering while decoding is illegal.
+  */
+  int32_t RegisterDecodeCompleteCallback(VCMDecodedFrameCallback* callback);
+
+  bool External() const;
+  bool PrefersLateDecoding() const;
+
+ private:
+  VCMDecodedFrameCallback* _callback;
+  VCMFrameInformation _frameInfos[kDecoderFrameMemoryLength];
+  uint32_t _nextFrameInfoIdx;
+  VideoDecoder* const _decoder;
+  VideoCodecType _codecType;
+  bool _isExternal;
+  bool _keyFrameDecoded;
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_VIDEO_CODING_GENERIC_DECODER_H_