mirror of
https://github.com/kasmtech/KasmVNC.git
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230 lines
7.8 KiB
C++
230 lines
7.8 KiB
C++
/* Copyright (C) 2000-2003 Constantin Kaplinsky. All Rights Reserved.
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* Copyright (C) 2011 D. R. Commander. All Rights Reserved.
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* Copyright 2014-2018 Pierre Ossman for Cendio AB
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* Copyright (C) 2018 Lauri Kasanen
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#ifndef __RFB_ENCODEMANAGER_H__
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#define __RFB_ENCODEMANAGER_H__
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#include <vector>
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#include <list>
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#include <rdr/types.h>
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#include <rfb/PixelBuffer.h>
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#include <rfb/Region.h>
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#include <rfb/Timer.h>
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#include <rfb/UpdateTracker.h>
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#include <rfb/util.h>
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#include <stdint.h>
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#include <sys/time.h>
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namespace rfb {
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class SConnection;
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class Encoder;
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class UpdateInfo;
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class Palette;
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class PixelBuffer;
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class RenderedCursor;
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class EncCache;
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struct Rect;
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struct RectInfo;
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struct QualityInfo;
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class EncodeManager: public Timer::Callback {
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public:
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EncodeManager(SConnection* conn, EncCache *encCache);
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~EncodeManager();
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void logStats();
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// Hack to let ConnParams calculate the client's preferred encoding
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static bool supported(int encoding);
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bool needsLosslessRefresh(const Region& req);
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void pruneLosslessRefresh(const Region& limits);
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void writeUpdate(const UpdateInfo& ui, const PixelBuffer* pb,
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const RenderedCursor* renderedCursor,
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size_t maxUpdateSize = 2000);
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void writeLosslessRefresh(const Region& req, const PixelBuffer* pb,
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const RenderedCursor* renderedCursor,
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size_t maxUpdateSize);
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void clearEncodingTime() {
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encodingTime = 0;
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};
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unsigned getEncodingTime() const {
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return encodingTime;
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};
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unsigned getScalingTime() const {
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return scalingTime;
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};
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void resetZlib();
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struct codecstats_t {
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uint32_t ms;
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uint32_t area;
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uint32_t rects;
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};
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codecstats_t jpegstats, webpstats;
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protected:
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void doUpdate(bool allowLossy, const Region& changed,
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const Region& copied, const Point& copy_delta,
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const std::vector<CopyPassRect> ©passed,
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const PixelBuffer* pb,
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const RenderedCursor* renderedCursor);
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void prepareEncoders(bool allowLossy);
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Region getLosslessRefresh(const Region& req, size_t maxUpdateSize);
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int computeNumRects(const Region& changed);
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Encoder *startRect(const Rect& rect, int type, const bool trackQuality = true,
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const uint8_t isWebp = 0);
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void endRect(const uint8_t isWebp = 0);
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void writeCopyRects(const Region& copied, const Point& delta);
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void writeCopyPassRects(const std::vector<CopyPassRect>& copypassed);
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void writeSolidRects(Region *changed, const PixelBuffer* pb);
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void findSolidRect(const Rect& rect, Region *changed, const PixelBuffer* pb);
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void writeRects(const Region& changed, const PixelBuffer* pb,
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const struct timeval *start = NULL,
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const bool mainScreen = false);
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void checkWebpFallback(const struct timeval *start);
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void updateVideoStats(const std::vector<Rect> &rects, const PixelBuffer* pb);
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void writeSubRect(const Rect& rect, const PixelBuffer *pb, const uint8_t type,
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const Palette& pal, const std::vector<uint8_t> &compressed,
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const uint8_t isWebp);
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uint8_t getEncoderType(const Rect& rect, const PixelBuffer *pb, Palette *pal,
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std::vector<uint8_t> &compressed, uint8_t *isWebp,
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uint8_t *fromCache,
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const PixelBuffer *scaledpb, const Rect& scaledrect,
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uint32_t &ms) const;
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virtual bool handleTimeout(Timer* t);
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bool checkSolidTile(const Rect& r, const rdr::U8* colourValue,
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const PixelBuffer *pb);
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void extendSolidAreaByBlock(const Rect& r, const rdr::U8* colourValue,
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const PixelBuffer *pb, Rect* er);
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void extendSolidAreaByPixel(const Rect& r, const Rect& sr,
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const rdr::U8* colourValue,
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const PixelBuffer *pb, Rect* er);
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PixelBuffer* preparePixelBuffer(const Rect& rect,
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const PixelBuffer *pb, bool convert) const;
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bool analyseRect(const PixelBuffer *pb,
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struct RectInfo *info, int maxColours) const;
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void updateQualities();
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void trackRectQuality(const Rect& rect);
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unsigned getQuality(const Rect& rect) const;
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unsigned scaledQuality(const Rect& rect) const;
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protected:
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// Preprocessor generated, optimised methods
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inline bool checkSolidTile(const Rect& r, rdr::U8 colourValue,
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const PixelBuffer *pb);
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inline bool checkSolidTile(const Rect& r, rdr::U16 colourValue,
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const PixelBuffer *pb);
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inline bool checkSolidTile(const Rect& r, rdr::U32 colourValue,
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const PixelBuffer *pb);
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inline bool analyseRect(int width, int height,
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const rdr::U8* buffer, int stride,
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struct RectInfo *info, int maxColours) const;
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inline bool analyseRect(int width, int height,
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const rdr::U16* buffer, int stride,
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struct RectInfo *info, int maxColours) const;
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inline bool analyseRect(int width, int height,
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const rdr::U32* buffer, int stride,
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struct RectInfo *info, int maxColours) const;
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protected:
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SConnection *conn;
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std::vector<Encoder*> encoders;
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std::vector<int> activeEncoders;
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Region lossyRegion;
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struct EncoderStats {
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unsigned rects;
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unsigned long long bytes;
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unsigned long long pixels;
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unsigned long long equivalent;
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};
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typedef std::vector< std::vector<struct EncoderStats> > StatsVector;
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std::list<QualityInfo*> qualityList;
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int dynamicQualityMin;
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int dynamicQualityOff;
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unsigned char *areaPercentages;
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unsigned areaCur;
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bool videoDetected;
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Timer videoTimer;
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uint16_t maxVideoX, maxVideoY;
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unsigned updates;
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EncoderStats copyStats;
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StatsVector stats;
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int activeType;
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int beforeLength;
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size_t curMaxUpdateSize;
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unsigned webpFallbackUs;
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unsigned webpBenchResult;
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bool webpTookTooLong;
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unsigned encodingTime;
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unsigned maxEncodingTime, framesSinceEncPrint;
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unsigned scalingTime;
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EncCache *encCache;
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class OffsetPixelBuffer : public FullFramePixelBuffer {
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public:
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OffsetPixelBuffer() {}
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virtual ~OffsetPixelBuffer() {}
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void update(const PixelFormat& pf, int width, int height,
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const rdr::U8* data_, int stride);
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private:
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virtual rdr::U8* getBufferRW(const Rect& r, int* stride);
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};
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};
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PixelBuffer *nearestScale(const PixelBuffer *pb, const uint16_t w, const uint16_t h,
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const float diff);
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PixelBuffer *bilinearScale(const PixelBuffer *pb, const uint16_t w, const uint16_t h,
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const float diff);
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PixelBuffer *progressiveBilinearScale(const PixelBuffer *pb, const uint16_t w, const uint16_t h,
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const float diff);
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}
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#endif
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