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<a class="el" href="dir_000000.html">include</a> » <a class="el" href="dir_000001.html">mpcdec</a></div>
<h1>math.h</h1><a href="math_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) 2005, The Musepack Development Team</span>
<a name="l00003"></a>00003 <span class="comment"> All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Redistribution and use in source and binary forms, with or without</span>
<a name="l00006"></a>00006 <span class="comment"> modification, are permitted provided that the following conditions are</span>
<a name="l00007"></a>00007 <span class="comment"> met:</span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> * Redistributions of source code must retain the above copyright</span>
<a name="l00010"></a>00010 <span class="comment"> notice, this list of conditions and the following disclaimer.</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment"> * Redistributions in binary form must reproduce the above</span>
<a name="l00013"></a>00013 <span class="comment"> copyright notice, this list of conditions and the following</span>
<a name="l00014"></a>00014 <span class="comment"> disclaimer in the documentation and/or other materials provided</span>
<a name="l00015"></a>00015 <span class="comment"> with the distribution.</span>
<a name="l00016"></a>00016 <span class="comment"></span>
<a name="l00017"></a>00017 <span class="comment"> * Neither the name of the The Musepack Development Team nor the</span>
<a name="l00018"></a>00018 <span class="comment"> names of its contributors may be used to endorse or promote</span>
<a name="l00019"></a>00019 <span class="comment"> products derived from this software without specific prior</span>
<a name="l00020"></a>00020 <span class="comment"> written permission.</span>
<a name="l00021"></a>00021 <span class="comment"></span>
<a name="l00022"></a>00022 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
<a name="l00023"></a>00023 <span class="comment"> "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
<a name="l00024"></a>00024 <span class="comment"> LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
<a name="l00025"></a>00025 <span class="comment"> A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
<a name="l00026"></a>00026 <span class="comment"> OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00027"></a>00027 <span class="comment"> SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
<a name="l00028"></a>00028 <span class="comment"> LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span>
<a name="l00029"></a>00029 <span class="comment"> DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span>
<a name="l00030"></a>00030 <span class="comment"> THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00031"></a>00031 <span class="comment"> (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
<a name="l00032"></a>00032 <span class="comment"> OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00033"></a>00033 <span class="comment">*/</span>
<a name="l00034"></a>00034
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="preprocessor">#ifndef _mpcdec_math_h_</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor">#define _mpcdec_math_h_</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00041"></a>00041 <span class="comment">//#define MPC_FIXED_POINT</span>
<a name="l00042"></a>00042
<a name="l00043"></a><a class="code" href="math_8h.html#a0">00043</a> <span class="preprocessor">#define MPC_FIXED_POINT_SHIFT 16</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>
<a name="l00045"></a>00045 <span class="preprocessor">#ifdef MPC_FIXED_POINT</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span>
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="preprocessor">#ifdef _WIN32_WCE</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span>
<a name="l00050"></a>00050 <span class="preprocessor">#include <cmnintrin.h></span>
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="preprocessor">#define MPC_HAVE_MULHIGH</span>
<a name="l00053"></a>00053 <span class="preprocessor"></span>
<a name="l00054"></a>00054 <span class="preprocessor">#endif</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span>
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="preprocessor">#define MPC_FIXED_POINT_SCALE_SHIFT (MPC_FIXED_POINT_SHIFT + MPC_FIXED_POINT_FRACTPART)</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span><span class="preprocessor">#define MPC_FIXED_POINT_SCALE (1 << (MPC_FIXED_POINT_SCALE_SHIFT - 1))</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span>
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="comment">//in fixedpoint mode, results in decode output buffer are in -MPC_FIXED_POINT_SCALE ... MPC_FIXED_POINT_SCALE range</span>
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="preprocessor">#define MPC_FIXED_POINT_FRACTPART 14</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="keyword">typedef</span> mpc_int32_t <a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a>;
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="keyword">typedef</span> mpc_int64_t MPC_SAMPLE_FORMAT_MULTIPLY;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="preprocessor">#define MAKE_MPC_SAMPLE(X) (MPC_SAMPLE_FORMAT)((double)(X) * (double)(((mpc_int64_t)1)<<MPC_FIXED_POINT_FRACTPART))</span>
<a name="l00069"></a>00069 <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>
<a name="l00070"></a>00070 <span class="preprocessor"></span>
<a name="l00071"></a>00071 <span class="preprocessor">#define MPC_MULTIPLY_NOTRUNCATE(X,Y) \</span>
<a name="l00072"></a>00072 <span class="preprocessor"> (((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> MPC_FIXED_POINT_FRACTPART)</span>
<a name="l00073"></a>00073 <span class="preprocessor"></span>
<a name="l00074"></a>00074 <span class="preprocessor">#define MPC_MULTIPLY_EX_NOTRUNCATE(X,Y,Z) \</span>
<a name="l00075"></a>00075 <span class="preprocessor"> (((MPC_SAMPLE_FORMAT_MULTIPLY)(X) * (MPC_SAMPLE_FORMAT_MULTIPLY)(Y)) >> (Z))</span>
<a name="l00076"></a>00076 <span class="preprocessor"></span>
<a name="l00077"></a>00077 <span class="preprocessor">#ifdef _DEBUG</span>
<a name="l00078"></a>00078 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> <a class="code" href="math_8h.html#a9">MPC_MULTIPLY</a>(<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> item1,<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> item2)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_NOTRUNCATE(item1,item2);
<a name="l00081"></a>00081 assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a>)temp);
<a name="l00082"></a>00082 <span class="keywordflow">return</span> (MPC_SAMPLE_FORMAT)temp;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> <a class="code" href="math_8h.html#a10">MPC_MULTIPLY_EX</a>(<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> item1,<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a> item2,<span class="keywordtype">unsigned</span> shift)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 MPC_SAMPLE_FORMAT_MULTIPLY temp = MPC_MULTIPLY_EX_NOTRUNCATE(item1,item2,shift);
<a name="l00088"></a>00088 assert(temp == (MPC_SAMPLE_FORMAT_MULTIPLY)(<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a>)temp);
<a name="l00089"></a>00089 <span class="keywordflow">return</span> (<a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a>)temp;
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="preprocessor">#else</span>
<a name="l00093"></a>00093 <span class="preprocessor"></span>
<a name="l00094"></a>00094 <span class="preprocessor">#define MPC_MULTIPLY(X,Y) ((MPC_SAMPLE_FORMAT)MPC_MULTIPLY_NOTRUNCATE(X,Y))</span>
<a name="l00095"></a>00095 <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>
<a name="l00096"></a>00096 <span class="preprocessor"></span>
<a name="l00097"></a>00097 <span class="preprocessor">#endif</span>
<a name="l00098"></a>00098 <span class="preprocessor"></span>
<a name="l00099"></a>00099 <span class="preprocessor">#ifdef MPC_HAVE_MULHIGH</span>
<a name="l00100"></a>00100 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT(X,Y) _MulHigh(X,Y)</span>
<a name="l00101"></a>00101 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00102"></a>00102 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT(X,Y) MPC_MULTIPLY_EX(X,Y,32)</span>
<a name="l00103"></a>00103 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00104"></a>00104 <span class="preprocessor"></span>
<a name="l00105"></a>00105 <span class="preprocessor">#define MPC_MAKE_FRACT_CONST(X) (MPC_SAMPLE_FORMAT)((X) * (double)(((mpc_int64_t)1)<<32) )</span>
<a name="l00106"></a>00106 <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST(X,Y) MPC_MULTIPLY_FRACT(X,MPC_MAKE_FRACT_CONST(Y))</span>
<a name="l00107"></a>00107 <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>
<a name="l00108"></a>00108 <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>
<a name="l00109"></a>00109 <span class="preprocessor"></span>
<a name="l00110"></a>00110 <span class="preprocessor">#define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))</span>
<a name="l00111"></a>00111 <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>
<a name="l00112"></a>00112 <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>
<a name="l00113"></a>00113 <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>
<a name="l00114"></a>00114 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHR(X,Y) ((X)>>(Y))</span>
<a name="l00115"></a>00115 <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHL(X,Y) ((X)<<(Y))</span>
<a name="l00116"></a>00116 <span class="preprocessor"></span>
<a name="l00117"></a>00117 <span class="preprocessor">#else</span>
<a name="l00118"></a>00118 <span class="preprocessor"></span>
<a name="l00119"></a>00119 <span class="comment">//in floating-point mode, decoded samples are in -1...1 range</span>
<a name="l00120"></a>00120
<a name="l00121"></a><a class="code" href="math_8h.html#a16">00121</a> <span class="keyword">typedef</span> <span class="keywordtype">float</span> <a class="code" href="math_8h.html#a16">MPC_SAMPLE_FORMAT</a>;
<a name="l00122"></a>00122
<a name="l00123"></a><a class="code" href="math_8h.html#a1">00123</a> <span class="preprocessor">#define MAKE_MPC_SAMPLE(X) ((MPC_SAMPLE_FORMAT)(X))</span>
<a name="l00124"></a><a class="code" href="math_8h.html#a2">00124</a> <span class="preprocessor"></span><span class="preprocessor">#define MAKE_MPC_SAMPLE_EX(X,Y) ((MPC_SAMPLE_FORMAT)(X))</span>
<a name="l00125"></a>00125 <span class="preprocessor"></span>
<a name="l00126"></a><a class="code" href="math_8h.html#a3">00126</a> <span class="preprocessor">#define MPC_MULTIPLY_FRACT(X,Y) ((X)*(Y))</span>
<a name="l00127"></a><a class="code" href="math_8h.html#a4">00127</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_MAKE_FRACT_CONST(X) (X)</span>
<a name="l00128"></a><a class="code" href="math_8h.html#a5">00128</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_FRACT_CONST(X,Y) MPC_MULTPLY_FRACT(X,MPC_MAKE_FRACT_CONST(Y))</span>
<a name="l00129"></a><a class="code" href="math_8h.html#a6">00129</a> <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>
<a name="l00130"></a><a class="code" href="math_8h.html#a7">00130</a> <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>
<a name="l00131"></a>00131 <span class="preprocessor"></span>
<a name="l00132"></a><a class="code" href="math_8h.html#a8">00132</a> <span class="preprocessor">#define MPC_MULTIPLY_FLOAT_INT(X,Y) ((X)*(Y))</span>
<a name="l00133"></a><a class="code" href="math_8h.html#a9">00133</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY(X,Y) ((X)*(Y))</span>
<a name="l00134"></a><a class="code" href="math_8h.html#a10">00134</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_MULTIPLY_EX(X,Y,Z) ((X)*(Y))</span>
<a name="l00135"></a><a class="code" href="math_8h.html#a11">00135</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST(X,Y,Z) ((X)*(Y))</span>
<a name="l00136"></a><a class="code" href="math_8h.html#a12">00136</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST_SHL(X,Y,Z,S) ((X)*(Y))</span>
<a name="l00137"></a><a class="code" href="math_8h.html#a13">00137</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_SCALE_CONST_SHR(X,Y,Z,S) ((X)*(Y))</span>
<a name="l00138"></a><a class="code" href="math_8h.html#a14">00138</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHR(X,Y) (X)</span>
<a name="l00139"></a><a class="code" href="math_8h.html#a15">00139</a> <span class="preprocessor"></span><span class="preprocessor">#define MPC_SHL(X,Y) (X)</span>
<a name="l00140"></a>00140 <span class="preprocessor"></span>
<a name="l00141"></a>00141 <span class="preprocessor">#endif</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span>
<a name="l00143"></a>00143 <span class="preprocessor">#endif // _mpcdec_math_h_</span>
<a name="l00144"></a>00144 <span class="preprocessor"></span>
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