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common/rfb/DecodeManager.h

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+/* Copyright 2015 Pierre Ossman for Cendio AB
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RFB_DECODEMANAGER_H__
+#define __RFB_DECODEMANAGER_H__
+
+#include <list>
+
+#include <os/Thread.h>
+
+#include <rfb/Region.h>
+#include <rfb/encodings.h>
+
+namespace os {
+  class Condition;
+  class Mutex;
+}
+
+namespace rdr {
+  struct Exception;
+  class MemOutStream;
+}
+
+namespace rfb {
+  class CConnection;
+  class Decoder;
+  class ModifiablePixelBuffer;
+  struct Rect;
+
+  class DecodeManager {
+  public:
+    DecodeManager(CConnection *conn);
+    ~DecodeManager();
+
+    void decodeRect(const Rect& r, int encoding,
+                    ModifiablePixelBuffer* pb);
+
+    void flush();
+
+  private:
+    void setThreadException(const rdr::Exception& e);
+    void throwThreadException();
+
+  private:
+    CConnection *conn;
+    Decoder *decoders[encodingMax+1];
+
+    struct QueueEntry {
+      bool active;
+      Rect rect;
+      int encoding;
+      Decoder* decoder;
+      const ConnParams* cp;
+      ModifiablePixelBuffer* pb;
+      rdr::MemOutStream* bufferStream;
+      Region affectedRegion;
+    };
+
+    std::list<rdr::MemOutStream*> freeBuffers;
+    std::list<QueueEntry*> workQueue;
+
+    os::Mutex* queueMutex;
+    os::Condition* producerCond;
+    os::Condition* consumerCond;
+
+  private:
+    class DecodeThread : public os::Thread {
+    public:
+      DecodeThread(DecodeManager* manager);
+      ~DecodeThread();
+
+      void stop();
+
+    protected:
+      void worker();
+      DecodeManager::QueueEntry* findEntry();
+
+    private:
+      DecodeManager* manager;
+
+      bool stopRequested;
+    };
+
+    std::list<DecodeThread*> threads;
+    rdr::Exception *threadException;
+  };
+}
+
+#endif