Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5

1 files changed, 399 insertions, 0 deletions

diff --git a/libFDK/src/scale.cpp b/libFDK/src/scale.cpp
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+/***************************  Fraunhofer IIS FDK Tools  **********************
+
+                        (C) Copyright Fraunhofer IIS (2005)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    You may use this software and/or program only under the terms and
+    conditions described in the above mentioned Fraunhofer IIS Software
+    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+
+
+   $Id$
+   Author(s):
+   Description: Scaling operations
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+******************************************************************************/
+
+#include "common_fix.h"
+
+#include "genericStds.h"
+
+/**************************************************
+ * Inline definitions
+ **************************************************/
+
+#define SCALE_INLINE inline
+
+
+#if defined(__mips__)	/* cppp replaced: elif */
+#include "mips/scale.cpp"
+
+#elif defined(__arm__)
+#include "arm/scale_arm.cpp"
+
+#endif
+
+#ifndef FUNCTION_scaleValues_SGL
+/*!
+ *
+ *  \brief  Multiply input vector by \f$ 2^{scalefactor} \f$
+ *  \param len    must be larger than 4
+ *  \return void
+ *
+ */
+#define FUNCTION_scaleValues_SGL
+SCALE_INLINE
+void scaleValues(FIXP_SGL *vector,  /*!< Vector */
+                 INT len,            /*!< Length */
+                 INT scalefactor     /*!< Scalefactor */
+                 )
+{
+  INT i;
+
+  /* Return if scalefactor is Zero */
+  if (scalefactor==0) return;
+
+  if(scalefactor > 0){
+    scalefactor = fixmin_I(scalefactor,(INT)(DFRACT_BITS-1));
+    for (i = len&3; i--; )
+    {
+      *(vector++) <<= scalefactor;
+    }
+    for (i = len>>2; i--; )
+    {
+      *(vector++) <<= scalefactor;
+      *(vector++) <<= scalefactor;
+      *(vector++) <<= scalefactor;
+      *(vector++) <<= scalefactor;
+    }
+  } else {
+    INT negScalefactor = fixmin_I(-scalefactor,(INT)DFRACT_BITS-1);
+    for (i = len&3; i--; )
+    {
+      *(vector++) >>= negScalefactor;
+    }
+    for (i = len>>2; i--; )
+    {
+      *(vector++) >>= negScalefactor;
+      *(vector++) >>= negScalefactor;
+      *(vector++) >>= negScalefactor;
+      *(vector++) >>= negScalefactor;
+    }
+  }
+}
+#endif
+
+#ifndef FUNCTION_scaleValues_DBL
+/*!
+ *
+ *  \brief  Multiply input vector by \f$ 2^{scalefactor} \f$
+ *  \param len must be larger than 4
+ *  \return void
+ *
+ */
+#define FUNCTION_scaleValues_DBL
+SCALE_INLINE
+void scaleValues(FIXP_DBL *vector,    /*!< Vector */
+                 INT len,             /*!< Length */
+                 INT scalefactor      /*!< Scalefactor */
+                )
+{
+  INT i;
+
+  /* Return if scalefactor is Zero */
+  if (scalefactor==0) return;
+
+  if(scalefactor > 0){
+    scalefactor = fixmin_I(scalefactor,(INT)DFRACT_BITS-1);
+    for (i = len&3; i--; )
+    {
+      *(vector++) <<= scalefactor;
+    }
+    for (i = len>>2; i--; )
+    {
+      *(vector++) <<= scalefactor;
+      *(vector++) <<= scalefactor;
+      *(vector++) <<= scalefactor;
+      *(vector++) <<= scalefactor;
+    }
+  } else {
+    INT negScalefactor = fixmin_I(-scalefactor,(INT)DFRACT_BITS-1);
+    for (i = len&3; i--; )
+    {
+      *(vector++) >>= negScalefactor;
+    }
+    for (i = len>>2; i--; )
+    {
+      *(vector++) >>= negScalefactor;
+      *(vector++) >>= negScalefactor;
+      *(vector++) >>= negScalefactor;
+      *(vector++) >>= negScalefactor;
+    }
+  }
+}
+#endif
+
+#ifndef FUNCTION_scaleValues_DBLDBL
+/*!
+ *
+ *  \brief  Multiply input vector src by \f$ 2^{scalefactor} \f$
+ *          and place result into dst
+ *  \param dst detination buffer
+ *  \param src source buffer
+ *  \param len must be larger than 4
+ *  \param scalefactor amount of left shifts to be applied
+ *  \return void
+ *
+ */
+#define FUNCTION_scaleValues_DBLDBL
+SCALE_INLINE
+void scaleValues(FIXP_DBL *dst,       /*!< dst Vector */
+                 const FIXP_DBL *src, /*!< src Vector */
+                 INT len,             /*!< Length */
+                 INT scalefactor      /*!< Scalefactor */
+                )
+{
+  INT i;
+
+  /* Return if scalefactor is Zero */
+  if (scalefactor==0) {
+	if (dst != src)
+      FDKmemmove(dst, src, len*sizeof(FIXP_DBL));
+  }
+  else {
+
+    if(scalefactor > 0){
+      scalefactor = fixmin_I(scalefactor,(INT)DFRACT_BITS-1);
+      for (i = len&3; i--; )
+      {
+        *(dst++) = *(src++) << scalefactor;
+      }
+      for (i = len>>2; i--; )
+      {
+        *(dst++) = *(src++) << scalefactor;
+        *(dst++) = *(src++) << scalefactor;
+        *(dst++) = *(src++) << scalefactor;
+        *(dst++) = *(src++) << scalefactor;
+      }
+    } else {
+      INT negScalefactor = fixmin_I(-scalefactor,(INT)DFRACT_BITS-1);
+      for (i = len&3; i--; )
+      {
+        *(dst++) = *(src++) >> negScalefactor;
+      }
+      for (i = len>>2; i--; )
+      {
+        *(dst++) = *(src++) >> negScalefactor;
+        *(dst++) = *(src++) >> negScalefactor;
+        *(dst++) = *(src++) >> negScalefactor;
+        *(dst++) = *(src++) >> negScalefactor;
+      }
+    }
+  }
+}
+#endif
+
+#ifndef FUNCTION_scaleValuesWithFactor_DBL
+/*!
+ *
+ *  \brief  Multiply input vector by \f$ 2^{scalefactor} \f$
+ *  \param len must be larger than 4
+ *  \return void
+ *
+ */
+#define FUNCTION_scaleValuesWithFactor_DBL
+SCALE_INLINE
+void scaleValuesWithFactor(
+        FIXP_DBL *vector,
+        FIXP_DBL factor,
+        INT len,
+        INT scalefactor
+        )
+{
+  INT i;
+
+  /* Compensate fMultDiv2 */
+  scalefactor++;
+
+  if(scalefactor > 0){
+    scalefactor = fixmin_I(scalefactor,(INT)DFRACT_BITS-1);
+    for (i = len&3; i--; )
+    {
+      *vector = fMultDiv2(*vector, factor) << scalefactor;
+      vector++;
+    }
+    for (i = len>>2; i--; )
+    {
+      *vector = fMultDiv2(*vector, factor) << scalefactor; vector++;
+      *vector = fMultDiv2(*vector, factor) << scalefactor; vector++;
+      *vector = fMultDiv2(*vector, factor) << scalefactor; vector++;
+      *vector = fMultDiv2(*vector, factor) << scalefactor; vector++;
+    }
+  } else {
+    INT negScalefactor = fixmin_I(-scalefactor,(INT)DFRACT_BITS-1);
+    for (i = len&3; i--; )
+    {
+      *vector = fMultDiv2(*vector, factor) >> negScalefactor;
+      vector++;
+    }
+    for (i = len>>2; i--; )
+    {
+      *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++;
+      *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++;
+      *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++;
+      *vector = fMultDiv2(*vector, factor) >> negScalefactor; vector++;
+    }
+  }
+}
+#endif /* FUNCTION_scaleValuesWithFactor_DBL */
+
+
+/*******************************************
+
+IMPORTANT NOTE for usage of getScalefactor()
+
+If the input array contains negative values too, then these functions may sometimes return
+the actual maximum value minus 1, due to the nature of the applied algorithm.
+So be careful with possible fractional -1 values that may lead to overflows when being fPow2()'ed.
+
+********************************************/
+
+
+
+#ifndef FUNCTION_getScalefactorShort
+/*!
+ *
+ *  \brief Calculate max possible scale factor for input vector of shorts
+ *
+ *  \return Maximum scale factor / possible left shift
+ *
+ */
+#define FUNCTION_getScalefactorShort
+SCALE_INLINE
+INT getScalefactorShort(const SHORT *vector, /*!< Pointer to input vector */
+                        INT len              /*!< Length of input vector */
+                       )
+{
+  INT i;
+  SHORT temp, maxVal = 0;
+
+  for(i=len;i!=0;i--){
+    temp = (SHORT)(*vector++);
+    maxVal |= (temp^(temp>>(SHORT_BITS-1)));
+  }
+
+  return fixmax_I((INT)0,(INT)(fixnormz_D((INT)maxVal) - (INT)1 - (INT)(DFRACT_BITS - SHORT_BITS)));
+}
+#endif
+
+#ifndef FUNCTION_getScalefactorPCM
+/*!
+ *
+ *  \brief Calculate max possible scale factor for input vector of shorts
+ *
+ *  \return Maximum scale factor
+ *
+ */
+#define FUNCTION_getScalefactorPCM
+SCALE_INLINE
+INT getScalefactorPCM(const INT_PCM *vector, /*!< Pointer to input vector */
+                      INT len,               /*!< Length of input vector */
+                      INT stride
+                      )
+{
+  INT i;
+  INT_PCM temp, maxVal = 0;
+
+  for(i=len;i!=0;i--){
+    temp = (INT_PCM)(*vector); vector+=stride;
+    maxVal |= (temp^(temp>>((sizeof(INT_PCM)*8)-1)));
+  }
+  return fixmax_I((INT)0,(INT)(fixnormz_D((INT)maxVal) - (INT)1 - (INT)(DFRACT_BITS - SAMPLE_BITS)));
+}
+#endif
+
+#ifndef FUNCTION_getScalefactorShort
+/*!
+ *
+ *  \brief Calculate max possible scale factor for input vector of shorts
+ *  \param stride, item increment between verctor members.
+ *  \return Maximum scale factor
+ *
+ */
+#define FUNCTION_getScalefactorShort
+SCALE_INLINE
+INT getScalefactorShort(const SHORT *vector, /*!< Pointer to input vector */
+                        INT len,             /*!< Length of input vector */
+                        INT stride
+                       )
+{
+  INT i;
+  SHORT temp, maxVal = 0;
+
+  for(i=len;i!=0;i--){
+    temp = (SHORT)(*vector); vector+=stride;
+    maxVal |= (temp^(temp>>(SHORT_BITS-1)));
+  }
+
+  return fixmax_I((INT)0,(INT)(fixnormz_D((INT)maxVal) - (INT)1 - (INT)(DFRACT_BITS - SHORT_BITS)));
+}
+#endif
+
+#ifndef FUNCTION_getScalefactor_DBL
+/*!
+ *
+ *  \brief Calculate max possible scale factor for input vector
+ *
+ *  \return Maximum scale factor
+ *
+ *  This function can constitute a significant amount of computational complexity - very much depending on the
+ *  bitrate. Since it is a rather small function, effective assembler optimization might be possible.
+ *
+ */
+#define FUNCTION_getScalefactor_DBL
+SCALE_INLINE
+INT getScalefactor(const FIXP_DBL *vector, /*!< Pointer to input vector */
+                   INT len)                /*!< Length of input vector */
+{
+  INT i;
+  FIXP_DBL temp, maxVal = (FIXP_DBL)0;
+
+  for(i=len;i!=0;i--){
+    temp = (LONG)(*vector++);
+    maxVal |= (FIXP_DBL)((LONG)temp^(LONG)(temp>>(DFRACT_BITS-1)));
+  }
+
+  return fixmax_I((INT)0,(INT)(fixnormz_D(maxVal) - 1));
+}
+#endif
+
+#ifndef FUNCTION_getScalefactor_SGL
+#define FUNCTION_getScalefactor_SGL
+SCALE_INLINE
+INT getScalefactor(const FIXP_SGL *vector, /*!< Pointer to input vector */
+                   INT len)                /*!< Length of input vector */
+{
+  INT i;
+  SHORT temp, maxVal = (FIXP_SGL)0;
+
+  for(i=len;i!=0;i--){
+    temp = (SHORT)(*vector++);
+    maxVal |= (temp^(temp>>(FRACT_BITS-1)));
+  }
+
+  return fixmax_I((INT)0,(INT)(fixnormz_D(FX_SGL2FX_DBL((FIXP_SGL)maxVal)) - 1));
+}
+#endif
+