Move some code out of the plugins into VideoCommon. No functional change.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@255 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/VideoCommon/Src/Fifo.h

@@ -0,0 +1,58 @@
+// Copyright (C) 2003-2008 Dolphin Project.
+
+// This program 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, version 2.0.
+
+// This program 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 2.0 for more details.
+
+// A copy of the GPL 2.0 should have been included with the program.
+// If not, see http://www.gnu.org/licenses/
+
+// Official SVN repository and contact information can be found at
+// http://code.google.com/p/dolphin-emu/
+
+#ifndef _FIFO_H
+#define _FIFO_H
+
+#include "Common.h"
+// inline for speed!
+class FifoReader
+{
+    u8 *ptr;
+    u8 *end;
+    u8 *tempPtr; //single element stack :P
+    u8 *tempEnd;
+    bool pushed;
+public:
+    void Init(u8 *_ptr, u8 *_end)
+    {
+        ptr = _ptr; end = _end; pushed = false;
+    }
+    bool IsPushed() {return pushed;}
+    void Push(u8 *_ptr, u8 *_end) {pushed = true; tempPtr = ptr; tempEnd = end; ptr = _ptr; end = _end;}
+    void Pop() {pushed = false; ptr = tempPtr; end = tempEnd;}
+    u8  Peek8 (int offset) const { return ptr[offset]; }
+    u16 Peek16(int offset) const { return Common::swap16(*(u16*)(ptr+offset)); }
+    u32 Peek32(int offset) const { return Common::swap32(*(u32*)(ptr+offset)); }
+    u8  Read8 () {return *ptr++;}
+    u16 Read16() {const u16 value = Common::swap16(*((u16*)ptr)); ptr+=2; return value;}
+    u32 Read32() {const u32 value = Common::swap32(*((u32*)ptr)); ptr+=4; return value;}
+    float Read32F() {const u32 value = Common::swap32(*((u32*)ptr)); ptr+=4; return *(float*)&value;}
+    int GetRemainSize() const { return (int)(end - ptr); }
+    u8 *GetPtr() const { return ptr; }
+    void MoveEndForward() { end += 32; }
+    u8 *GetEnd() const { return end; }
+};
+
+extern FifoReader fifo;
+
+void Fifo_Init();
+void Fifo_Shutdown();
+void Fifo_EnterLoop(const SVideoInitialize &video_initialize);
+
+#endif
+