125 lines
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125 lines
9.5 KiB
HTML
Executable File
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<title>libmusepack: include/mpc_math.h Source File</title>
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<h1>mpc_math.h</h1><a href="mpc__math_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001
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00002
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00003
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00004 <span class="preprocessor">#ifndef _MPC_MATH_H_</span>
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00005 <span class="preprocessor"></span><span class="preprocessor">#define _MPC_MATH_H_</span>
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00006 <span class="preprocessor"></span>
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00007 <span class="comment">//#define MPC_FIXED_POINT</span>
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00008
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00009 <span class="preprocessor">#define MPC_FIXED_POINT_SHIFT 16</span>
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00010 <span class="preprocessor"></span>
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00011 <span class="preprocessor">#ifdef MPC_FIXED_POINT</span>
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00012 <span class="preprocessor"></span>
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00013
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00014 <span class="preprocessor">#ifdef _WIN32_WCE</span>
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00015 <span class="preprocessor"></span>
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00016 <span class="preprocessor">#include <cmnintrin.h></span>
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00017
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00018 <span class="preprocessor">#define MPC_HAVE_MULHIGH</span>
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00019 <span class="preprocessor"></span>
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00020 <span class="preprocessor">#endif</span>
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00021 <span class="preprocessor"></span>
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00022
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00023 <span class="preprocessor">#define MPC_FIXED_POINT_SCALE_SHIFT (MPC_FIXED_POINT_SHIFT + MPC_FIXED_POINT_FRACTPART)</span>
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00024 <span class="preprocessor"></span><span class="preprocessor">#define MPC_FIXED_POINT_SCALE (1 << (MPC_FIXED_POINT_SCALE_SHIFT - 1))</span>
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00025 <span class="preprocessor"></span>
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00026
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00027 <span class="comment">//in fixedpoint mode, results in decode output buffer are in -MPC_FIXED_POINT_SCALE ... MPC_FIXED_POINT_SCALE range</span>
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00028
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00029 <span class="preprocessor">#define MPC_FIXED_POINT_FRACTPART 14</span>
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00030 <span class="preprocessor"></span><span class="keyword">typedef</span> mpc_int32_t MPC_SAMPLE_FORMAT;
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00031
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00032 <span class="keyword">typedef</span> mpc_int64_t MPC_SAMPLE_FORMAT_MULTIPLY;
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00033
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00034 <span class="preprocessor">#define MAKE_MPC_SAMPLE(X) (MPC_SAMPLE_FORMAT)((double)(X) * (double)(((mpc_int64_t)1)<<MPC_FIXED_POINT_FRACTPART))</span>
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00035 <span class="preprocessor"></span><span class="preprocessor">#define MAKE_MPC_SAMPLE_EX(X,Y) (MPC_SAMPLE_FORMAT)((double)(X) * (double)(((mpc_int64_t)1)<<(Y)))</span>
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00036 <span class="preprocessor"></span>
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00037 <span class="preprocessor">#define MPC_MULTIPLY_NOTRUNCATE(X,Y) \</span>
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00038 <span class="preprocessor"> (((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> MPC_FIXED_POINT_FRACTPART)</span>
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00039 <span class="preprocessor"></span>
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00040 <span class="preprocessor">#define MPC_MULTIPLY_EX_NOTRUNCATE(X,Y,Z) \</span>
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00041 <span class="preprocessor"> (((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> (Z))</span>
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00042 <span class="preprocessor"></span>
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00043 <span class="preprocessor">#ifdef _DEBUG</span>
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00044 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keyword">inline</span> MPC_SAMPLE_FORMAT MPC_MULTIPLY(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2)
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00045 {
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00046 MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_NOTRUNCATE(item1,item2);
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00047 assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(MPC_SAMPLE_FORMAT)temp);
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00048 <span class="keywordflow">return</span> (MPC_SAMPLE_FORMAT)temp;
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00049 }
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00050
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00051 <span class="keyword">static</span> <span class="keyword">inline</span> MPC_SAMPLE_FORMAT MPC_MULTIPLY_EX(MPC_SAMPLE_FORMAT item1,MPC_SAMPLE_FORMAT item2,<span class="keywordtype">unsigned</span> shift)
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00052 {
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00053 MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_EX_NOTRUNCATE(item1,item2,shift);
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00054 assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(MPC_SAMPLE_FORMAT)temp);
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00055 <span class="keywordflow">return</span> (MPC_SAMPLE_FORMAT)temp;
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00056 }
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00057
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00058 <span class="preprocessor">#else</span>
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00059 <span class="preprocessor"></span>
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00060 <span class="preprocessor">#define MPC_MULTIPLY(X,Y) ((MPC_SAMPLE_FORMAT)MPC_MULTIPLY_NOTRUNCATE(X,Y))</span>
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00061 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_EX(X,Y,Z) ((MPC_SAMPLE_FORMAT)MPC_MULTIPLY_EX_NOTRUNCATE(X,Y,Z))</span>
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00062 <span class="preprocessor"></span>
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00063 <span class="preprocessor">#endif</span>
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00064 <span class="preprocessor"></span>
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00065 <span class="preprocessor">#ifdef MPC_HAVE_MULHIGH</span>
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00066 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT(X,Y) _MulHigh(X,Y)</span>
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00067 <span class="preprocessor"></span><span class="preprocessor">#else</span>
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00068 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT(X,Y) MPC_MULTIPLY_EX(X,Y,32)</span>
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00069 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
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00070 <span class="preprocessor"></span>
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00071 <span class="preprocessor">#define MPC_MAKE_FRACT_CONST(X) (MPC_SAMPLE_FORMAT)((X) * (double)(((mpc_int64_t)1)<<32) )</span>
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00072 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST(X,Y) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST(Y))</span>
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00073 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST_FIX(X,Y,Z) ( MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y / (1<<(Z)) )) << (Z) )</span>
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00074 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST_SHR(X,Y,Z) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y / (1<<(Z)) ))</span>
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00075 <span class="preprocessor"></span>
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00076 <span class="preprocessor">#define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))</span>
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00077 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST(X,Y,Z) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z))</span>
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00078 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST_SHL(X,Y,Z,S) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z)-(S))</span>
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00079 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST_SHR(X,Y,Z,S) MPC_MULTIPLY_EX(X,MAKE_MPC_SAMPLE_EX(Y,Z),(Z)+(S))</span>
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00080 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHR(X,Y) ((X)>>(Y))</span>
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00081 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHL(X,Y) ((X)<<(Y))</span>
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00082 <span class="preprocessor"></span>
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00083 <span class="preprocessor">#else</span>
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00084 <span class="preprocessor"></span>
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00085 <span class="comment">//in floating-point mode, decoded samples are in -1...1 range</span>
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00086
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00087 <span class="keyword">typedef</span> <span class="keywordtype">float</span> MPC_SAMPLE_FORMAT;
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00088
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00089 <span class="preprocessor">#define MAKE_MPC_SAMPLE(X) ((MPC_SAMPLE_FORMAT)(X))</span>
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00090 <span class="preprocessor"></span><span class="preprocessor">#define MAKE_MPC_SAMPLE_EX(X,Y) ((MPC_SAMPLE_FORMAT)(X))</span>
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00091 <span class="preprocessor"></span>
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00092 <span class="preprocessor">#define MPC_MULTIPLY_FRACT(X,Y) ((X)*(Y))</span>
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00093 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MAKE_FRACT_CONST(X) (X)</span>
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00094 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST(X,Y) MPC_MULTPLY_FRACT(X,MPC_MAKE_FRACT_CONST(Y))</span>
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00095 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST_SHR(X,Y,Z) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y ))</span>
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00096 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST_FIX(X,Y,Z) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST( Y ))</span>
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00097 <span class="preprocessor"></span>
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00098 <span class="preprocessor">#define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))</span>
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00099 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY(X,Y) ((X)*(Y))</span>
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00100 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_EX(X,Y,Z) ((X)*(Y))</span>
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00101 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST(X,Y,Z) ((X)*(Y))</span>
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00102 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST_SHL(X,Y,Z,S) ((X)*(Y))</span>
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00103 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST_SHR(X,Y,Z,S) ((X)*(Y))</span>
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00104 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHR(X,Y) (X)</span>
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00105 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHL(X,Y) (X)</span>
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00106 <span class="preprocessor"></span>
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00107 <span class="preprocessor">#endif</span>
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00108 <span class="preprocessor"></span>
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00109 <span class="preprocessor">#endif</span>
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00110 <span class="preprocessor"></span>
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</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sat Dec 11 14:43:45 2004 for libmusepack by
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<a href="http://www.doxygen.org/index.html">
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.3.9.1 </small></address>
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