libbpg-0.9.3

jctvc/TLibCommon/ContextModel3DBuffer.h

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+/* The copyright in this software is being made available under the BSD
+ * License, included below. This software may be subject to other third party
+ * and contributor rights, including patent rights, and no such rights are
+ * granted under this license.
+ *
+ * Copyright (c) 2010-2014, ITU/ISO/IEC
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
+ *    be used to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** \file     ContextModel3DBuffer.h
+    \brief    context model 3D buffer class (header)
+*/
+
+#ifndef __CONTEXTMODEL3DBUFFER__
+#define __CONTEXTMODEL3DBUFFER__
+
+#include <stdio.h>
+#include <assert.h>
+#include <memory.h>
+
+#include "CommonDef.h"
+#include "ContextModel.h"
+
+//! \ingroup TLibCommon
+//! \{
+
+// ====================================================================================================================
+// Class definition
+// ====================================================================================================================
+
+/// context model 3D buffer class
+class ContextModel3DBuffer
+{
+protected:
+  ContextModel* m_contextModel; ///< array of context models
+  const UInt    m_sizeX;        ///< X size of 3D buffer
+  const UInt    m_sizeXY;       ///< X times Y size of 3D buffer
+  const UInt    m_sizeXYZ;      ///< total size of 3D buffer
+
+public:
+  ContextModel3DBuffer  ( UInt uiSizeZ, UInt uiSizeY, UInt uiSizeX, ContextModel *basePtr, Int &count );
+  ~ContextModel3DBuffer () {}
+
+  // access functions
+  ContextModel& get( UInt uiZ, UInt uiY, UInt uiX )
+  {
+    return  m_contextModel[ uiZ * m_sizeXY + uiY * m_sizeX + uiX ];
+  }
+  ContextModel* get( UInt uiZ, UInt uiY )
+  {
+    return &m_contextModel[ uiZ * m_sizeXY + uiY * m_sizeX ];
+  }
+  ContextModel* get( UInt uiZ )
+  {
+    return &m_contextModel[ uiZ * m_sizeXY ];
+  }
+
+  // initialization & copy functions
+  Void initBuffer( SliceType eSliceType, Int iQp, UChar* ctxModel );          ///< initialize 3D buffer by slice type & QP
+
+  UInt calcCost( SliceType sliceType, Int qp, UChar* ctxModel );      ///< determine cost of choosing a probability table based on current probabilities
+  /** copy from another buffer
+   * \param src buffer to copy from
+   */
+  Void copyFrom( const ContextModel3DBuffer* src )
+  {
+    assert( m_sizeXYZ == src->m_sizeXYZ );
+    ::memcpy( m_contextModel, src->m_contextModel, sizeof(ContextModel) * m_sizeXYZ );
+  }
+};
+
+//! \}
+
+#endif // _HM_CONTEXT_MODEL_3DBUFFER_H_