diff options
Diffstat (limited to 'libFDK/include/fixpoint_math.h')
| -rw-r--r-- | libFDK/include/fixpoint_math.h | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/libFDK/include/fixpoint_math.h b/libFDK/include/fixpoint_math.h index 26c001f..6aa0a90 100644 --- a/libFDK/include/fixpoint_math.h +++ b/libFDK/include/fixpoint_math.h @@ -2,7 +2,7 @@ /* ----------------------------------------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. +© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. All rights reserved. 1. INTRODUCTION @@ -94,6 +94,35 @@ amm-info@iis.fraunhofer.de #include "common_fix.h" +#if !defined(FUNCTION_fIsLessThan) +/** + * \brief Compares two fixpoint values incl. scaling. + * \param a_m mantissa of the first input value. + * \param a_e exponent of the first input value. + * \param b_m mantissa of the second input value. + * \param b_e exponent of the second input value. + * \return non-zero if (a_m*2^a_e) < (b_m*2^b_e), 0 otherwise + */ +FDK_INLINE INT fIsLessThan(FIXP_DBL a_m, INT a_e, FIXP_DBL b_m, INT b_e) +{ + if (a_e > b_e) { + return (b_m >> fMin(a_e-b_e, DFRACT_BITS-1) > a_m); + } else { + return (a_m >> fMin(b_e-a_e, DFRACT_BITS-1) < b_m); + } +} + +FDK_INLINE INT fIsLessThan(FIXP_SGL a_m, INT a_e, FIXP_SGL b_m, INT b_e) +{ + if (a_e > b_e) { + return (b_m >> fMin(a_e-b_e, FRACT_BITS-1) > a_m); + } else { + return (a_m >> fMin(b_e-a_e, FRACT_BITS-1) < b_m); + } +} +#endif + + #define LD_DATA_SCALING (64.0f) #define LD_DATA_SHIFT 6 /* pow(2, LD_DATA_SHIFT) = LD_DATA_SCALING */ @@ -438,11 +467,11 @@ inline FIXP_DBL fAddSaturate(const FIXP_DBL a, const FIXP_DBL b) /***************************************************************************** - array for 1/n, n=1..50 + array for 1/n, n=1..80 ****************************************************************************/ - extern const FIXP_DBL invCount[50]; + extern const FIXP_DBL invCount[80]; LNK_SECTION_INITCODE inline void InitInvInt(void) {} @@ -450,17 +479,17 @@ inline FIXP_DBL fAddSaturate(const FIXP_DBL a, const FIXP_DBL b) /** * \brief Calculate the value of 1/i where i is a integer value. It supports - * input values from 0 upto 49. + * input values from 0 upto 79. * \param intValue Integer input value. * \param FIXP_DBL representation of 1/intValue */ inline FIXP_DBL GetInvInt(int intValue) { - FDK_ASSERT((intValue >= 0) && (intValue < 50)); - if (intValue < 0) + FDK_ASSERT((intValue >= 0) && (intValue < 80)); + if (intValue > 79) + return invCount[79]; + else if (intValue < 0) return invCount[0]; - else if (intValue > 49) - return invCount[49]; else return invCount[intValue]; } |