Redesigned the ring buffer; prepared for remultiplexing

ringbuffer.h

@@ -0,0 +1,55 @@
+/*
+ * ringbuffer.h: A threaded ring buffer
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: ringbuffer.h 1.1 2001/03/18 16:47:00 kls Exp $
+ */
+
+#ifndef __RINGBUFFER_H
+#define __RINGBUFFER_H
+
+#include "thread.h"
+
+typedef unsigned char uchar;
+
+class cRingBufferInputThread;
+class cRingBufferOutputThread;
+
+class cRingBuffer {
+  friend class cRingBufferInputThread;
+  friend class cRingBufferOutputThread;
+private:
+  cRingBufferInputThread *inputThread;
+  cRingBufferOutputThread *outputThread;
+  cMutex mutex;
+  int size, head, tail;
+  uchar *buffer;
+  int maxFill;
+  bool busy;
+protected:
+  bool Busy(void) { return busy; }
+  void Clear(void);
+    // Immediately clears the ring buffer.
+  int Put(const uchar *Data, int Count);
+    // Puts at most Count bytes of Data into the ring buffer.
+    // Returns the number of bytes actually stored.
+  int Get(uchar *Data, int Count);
+    // Gets at most Count bytes of Data from the ring buffer.
+    // Returns the number of bytes actually retrieved.
+  virtual void Input(void) = 0;
+    // Runs as a separate thread and shall continuously read data from
+    // a source and call Put() to store the data in the ring buffer.
+  virtual void Output(void) = 0;
+    // Runs as a separate thread and shall continuously call Get() to
+    // retrieve data from the ring buffer and write it to a destination.
+public:
+  cRingBuffer(int Size);
+  virtual ~cRingBuffer();
+  bool Start(void);
+  bool Active(void);
+  void Stop(void);
+  };
+
+#endif // __RINGBUFFER_H