Redesigned the ring buffer; prepared for remultiplexing

1 files changed, 51 insertions, 0 deletions

diff --git a/remux.h b/remux.h
new file mode 100644
index 00000000..bceb676b
--- /dev/null
+++ b/remux.h
@@ -0,0 +1,51 @@
+/*
+ * remux.h: A streaming MPEG2 remultiplexer
+ *
+ * See the main source file 'vdr.c' for copyright information and
+ * how to reach the author.
+ *
+ * $Id: remux.h 1.1 2001/03/31 08:42:27 kls Exp $
+ */
+
+#ifndef __REMUX_H
+#define __REMUX_H
+
+// There are various experiments with different types of remultiplexers
+// going on at the moment. Select the remultiplexer here:
+#define REMUX_NONE 1
+//#define REMUX_TEST 1
+
+// Picture types:
+#define NO_PICTURE 0
+#define I_FRAME    1
+#define P_FRAME    2
+#define B_FRAME    3
+
+// Start codes:
+#define SC_PICTURE 0x00  // "picture header"
+#define SC_SEQU    0xB3  // "sequence header"
+#define SC_PHEAD   0xBA  // "pack header"
+#define SC_SHEAD   0xBB  // "system header"
+#define SC_AUDIO   0xC0
+#define SC_VIDEO   0xE0
+
+// The minimum amount of video data necessary to identify frames:
+#define MINVIDEODATA (256*1024) // just a safe guess (max. size of any frame block, plus some safety)
+
+typedef unsigned char uchar;
+
+class cRemux {
+private:
+#if defined(REMUX_NONE)
+  bool synced;
+  int GetPacketLength(const uchar *Data, int Count, int Offset);
+  int ScanVideoPacket(const uchar *Data, int Count, int Offset, uchar &PictureType);
+#elif defined(REMUX_TEST)
+#endif
+public:
+  cRemux(void);
+  ~cRemux();
+  const uchar *Process(const uchar *Data, int &Count, int &Result, uchar &PictureType);
+  };
+
+#endif // __REMUX_H