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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
+
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