git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d

modules/video_coding/main/source/generic_decoder.h

@@ -0,0 +1,120 @@
+/*
+ *  Copyright (c) 2011 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 "timing.h"
+#include "timestamp_map.h"
+#include "video_codec_interface.h"
+#include "encoded_frame.h"
+#include "module_common_types.h"
+
+namespace webrtc
+{
+
+class VCMReceiveCallback;
+
+enum { kDecoderFrameMemoryLength = 10 };
+
+struct VCMFrameInformation
+{
+    WebRtc_Word64     renderTimeMs;
+    WebRtc_Word64     decodeStartTimeMs;
+    void*             userData;
+};
+
+class VCMDecodedFrameCallback : public DecodedImageCallback
+{
+public:
+    VCMDecodedFrameCallback(VCMTiming& timing);
+    virtual ~VCMDecodedFrameCallback();
+    void SetUserReceiveCallback(VCMReceiveCallback* receiveCallback);
+
+    virtual WebRtc_Word32 Decoded(RawImage& decodedImage);
+    virtual WebRtc_Word32 ReceivedDecodedReferenceFrame(const WebRtc_UWord64 pictureId);
+    virtual WebRtc_Word32 ReceivedDecodedFrame(const WebRtc_UWord64 pictureId);
+
+    WebRtc_UWord64 LastReceivedPictureID() const;
+
+    WebRtc_Word32 Map(WebRtc_UWord32 timestamp, VCMFrameInformation* frameInfo);
+    WebRtc_Word32 Pop(WebRtc_UWord32 timestamp);
+
+private:
+    CriticalSectionWrapper&        _critSect;
+    VideoFrame                  _frame;
+    VCMReceiveCallback*         _receiveCallback;
+    VCMTiming&                  _timing;
+    VCMTimestampMap             _timestampMap;
+    WebRtc_UWord64				_lastReceivedPictureID;
+};
+
+
+class VCMGenericDecoder
+{
+    friend class VCMCodecDataBase;
+public:
+    VCMGenericDecoder(VideoDecoder& decoder, WebRtc_Word32 id = 0, bool isExternal = false);
+    ~VCMGenericDecoder();
+
+    /**
+    *	Initialize the decoder with the information from the VideoCodec
+    */
+    WebRtc_Word32 InitDecode(const VideoCodec* settings,
+                             WebRtc_Word32 numberOfCores,
+                             bool requireKeyFrame);
+
+    /**
+    *	Decode to a raw I420 frame,
+    *
+    *	inputVideoBuffer	reference to encoded video frame
+    */
+    WebRtc_Word32 Decode(const VCMEncodedFrame& inputFrame);
+
+    /**
+    *	Free the decoder memory
+    */
+    WebRtc_Word32 Release();
+
+    /**
+    *	Reset the decoder state, prepare for a new call
+    */
+    WebRtc_Word32 Reset();
+
+    /**
+    *	Codec configuration data sent out-of-band, i.e. in SIP call setup
+    *
+    *	buffer pointer to the configuration data
+    *	size the size of the configuration data in bytes
+    */
+    WebRtc_Word32 SetCodecConfigParameters(const WebRtc_UWord8* /*buffer*/,
+                                           WebRtc_Word32 /*size*/);
+
+    WebRtc_Word32 RegisterDecodeCompleteCallback(VCMDecodedFrameCallback* callback);
+
+    bool External() const;
+
+protected:
+
+    WebRtc_Word32               _id;
+    VCMDecodedFrameCallback*    _callback;
+    VCMFrameInformation         _frameInfos[kDecoderFrameMemoryLength];
+    WebRtc_UWord32              _nextFrameInfoIdx;
+    VideoDecoder&               _decoder;
+    VideoCodecType              _codecType;
+    bool                        _isExternal;
+    bool                        _requireKeyFrame;
+    bool                        _keyFrameDecoded;
+
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_MODULES_VIDEO_CODING_GENERIC_DECODER_H_