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#ifndef _MPC_MATH_H_
#define _MPC_MATH_H_
// #define MPC_FIXED_POINT
#ifdef _MSC_VER
typedef __int64 MPC_INT64;
#else
typedef long long MPC_INT64;
#endif
#define MPC_FIXED_POINT_SHIFT 16
#ifdef MPC_FIXED_POINT
#define MPC_FIXED_POINT_SCALE_SHIFT (MPC_FIXED_POINT_SHIFT + MPC_FIXED_POINT_FRACTPART)
#define MPC_FIXED_POINT_SCALE (1 << (MPC_FIXED_POINT_SCALE_SHIFT - 1))
//in fixedpoint mode, results in decode output buffer are in -MPC_FIXED_POINT_SCALE ... MPC_FIXED_POINT_SCALE range
#define MPC_FIXED_POINT_FRACTPART 14
typedef int MPC_SAMPLE_FORMAT;
typedef MPC_INT64 MPC_SAMPLE_FORMAT_MULTIPLY;
#define MAKE_MPC_SAMPLE(X) (MPC_SAMPLE_FORMAT)((double)(X) * (double)(((MPC_INT64)1)<<MPC_FIXED_POINT_FRACTPART))
#define MAKE_MPC_SAMPLE_EX(X,Y) (MPC_SAMPLE_FORMAT)((double)(X) * (double)(((MPC_INT64)1)<<(Y)))
#define MPC_MULTIPLY_NOTRUNCATE(X,Y) \
(((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> MPC_FIXED_POINT_FRACTPART)
#define MPC_MULTIPLY_EX_NOTRUNCATE(X,Y,Z) \
(((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> (Z))
#ifdef _DEBUG
static inline MPC_SAMPLE_FORMAT MPC_MULTIPLY(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2)
{
MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_NOTRUNCATE(item1,item2);
assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(MPC_SAMPLE_FORMAT)temp);
return (MPC_SAMPLE_FORMAT)temp;
}
static inline MPC_SAMPLE_FORMAT MPC_MULTIPLY_EX(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2,unsigned shift)
{
MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_EX_NOTRUNCATE(item1,item2,shift);
assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(MPC_SAMPLE_FORMAT)temp);
return (MPC_SAMPLE_FORMAT)temp;
}
#else
#define MPC_MULTIPLY(X,Y) ((MPC_SAMPLE_FORMAT)MPC_MULTIPLY_NOTRUNCATE(X,Y))
#define MPC_MULTIPLY_EX(X,Y,Z) ((MPC_SAMPLE_FORMAT)MPC_MULTIPLY_EX_NOTRUNCATE(X,Y,Z))
#endif
#define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))
#define MPC_SCALE_CONST(X,Y,Z) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z))
#define MPC_SCALE_CONST_SHL(X,Y,Z,S) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z)-(S))
#define MPC_SCALE_CONST_SHR(X,Y,Z,S) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z)+(S))
#define MPC_SHR(X,Y) ((X)>>(Y))
#define MPC_SHL(X,Y) ((X)<<(Y))
#else
//in floating-point mode, decoded samples are in -1...1 range
typedef float MPC_SAMPLE_FORMAT;
#define MAKE_MPC_SAMPLE(X) ((MPC_SAMPLE_FORMAT)(X))
#define MAKE_MPC_SAMPLE_EX(X,Y) ((MPC_SAMPLE_FORMAT)(X))
#define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))
#define MPC_MULTIPLY(X,Y) ((X)*(Y))
#define MPC_MULTIPLY_EX(X,Y,Z) ((X)*(Y))
#define MPC_SCALE_CONST(X,Y,Z) ((X)*(Y))
#define MPC_SCALE_CONST_SHL(X,Y,Z,S) ((X)*(Y))
#define MPC_SCALE_CONST_SHR(X,Y,Z,S) ((X)*(Y))
#define MPC_SHR(X,Y) (X)
#define MPC_SHL(X,Y) (X)
#endif
#endif
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