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<h1>g72x.h</h1> </div>
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<a href="g72x_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"> * This source code is a product of Sun Microsystems, Inc. and is provided</span>
<a name="l00003"></a>00003 <span class="comment"> * for unrestricted use. Users may copy or modify this source code without</span>
<a name="l00004"></a>00004 <span class="comment"> * charge.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING</span>
<a name="l00007"></a>00007 <span class="comment"> * THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00008"></a>00008 <span class="comment"> * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * Sun source code is provided with no support and without any obligation on</span>
<a name="l00011"></a>00011 <span class="comment"> * the part of Sun Microsystems, Inc. to assist in its use, correction,</span>
<a name="l00012"></a>00012 <span class="comment"> * modification or enhancement.</span>
<a name="l00013"></a>00013 <span class="comment"> *</span>
<a name="l00014"></a>00014 <span class="comment"> * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE</span>
<a name="l00015"></a>00015 <span class="comment"> * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE</span>
<a name="l00016"></a>00016 <span class="comment"> * OR ANY PART THEREOF.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * In no event will Sun Microsystems, Inc. be liable for any lost revenue</span>
<a name="l00019"></a>00019 <span class="comment"> * or profits or other special, indirect and consequential damages, even if</span>
<a name="l00020"></a>00020 <span class="comment"> * Sun has been advised of the possibility of such damages.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * Sun Microsystems, Inc.</span>
<a name="l00023"></a>00023 <span class="comment"> * 2550 Garcia Avenue</span>
<a name="l00024"></a>00024 <span class="comment"> * Mountain View, California 94043</span>
<a name="l00025"></a>00025 <span class="comment"> */</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="comment">/*</span>
<a name="l00028"></a>00028 <span class="comment"> * g72x.h</span>
<a name="l00029"></a>00029 <span class="comment"> *</span>
<a name="l00030"></a>00030 <span class="comment"> * Header file for CCITT conversion routines.</span>
<a name="l00031"></a>00031 <span class="comment"> *</span>
<a name="l00032"></a>00032 <span class="comment"> */</span>
<a name="l00033"></a>00033 <span class="preprocessor">#ifndef _G72X_H</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#define _G72X_H</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span>
<a name="l00036"></a><a class="code" href="g72x_8h.html#ae359d76f9fbd701c7b5bd1e591d66be9">00036</a> <span class="preprocessor">#define AUDIO_ENCODING_ULAW (1) </span><span class="comment">/* ISDN u-law */</span>
<a name="l00037"></a><a class="code" href="g72x_8h.html#a9b68df7c208894b621d7813820cc8b68">00037</a> <span class="preprocessor">#define AUDIO_ENCODING_ALAW (2) </span><span class="comment">/* ISDN A-law */</span>
<a name="l00038"></a><a class="code" href="g72x_8h.html#a92c1ad7f36269299ba0bcb7ca9b08221">00038</a> <span class="preprocessor">#define AUDIO_ENCODING_LINEAR (3) </span><span class="comment">/* PCM 2's-complement (0-center) */</span>
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">/*</span>
<a name="l00041"></a>00041 <span class="comment"> * The following is the definition of the state structure</span>
<a name="l00042"></a>00042 <span class="comment"> * used by the G.721/G.723 encoder and decoder to preserve their internal</span>
<a name="l00043"></a>00043 <span class="comment"> * state between successive calls. The meanings of the majority</span>
<a name="l00044"></a>00044 <span class="comment"> * of the state structure fields are explained in detail in the</span>
<a name="l00045"></a>00045 <span class="comment"> * CCITT Recommendation G.721. The field names are essentially indentical</span>
<a name="l00046"></a>00046 <span class="comment"> * to variable names in the bit level description of the coding algorithm</span>
<a name="l00047"></a>00047 <span class="comment"> * included in this Recommendation.</span>
<a name="l00048"></a>00048 <span class="comment"> */</span>
<a name="l00049"></a><a class="code" href="structg72x__state.html">00049</a> <span class="keyword">struct </span><a class="code" href="structg72x__state.html">g72x_state</a> {
<a name="l00050"></a><a class="code" href="structg72x__state.html#a807b5e84c2d64ee7776b2edca8de67f4">00050</a> <span class="keywordtype">long</span> <a class="code" href="structg72x__state.html#a807b5e84c2d64ee7776b2edca8de67f4">yl</a>; <span class="comment">/* Locked or steady state step size multiplier. */</span>
<a name="l00051"></a><a class="code" href="structg72x__state.html#a9b01934f60d42320e079a57e0b977d6d">00051</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#a9b01934f60d42320e079a57e0b977d6d">yu</a>; <span class="comment">/* Unlocked or non-steady state step size multiplier. */</span>
<a name="l00052"></a><a class="code" href="structg72x__state.html#a779d505204749451fdca216900b6d551">00052</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#a779d505204749451fdca216900b6d551">dms</a>; <span class="comment">/* Short term energy estimate. */</span>
<a name="l00053"></a><a class="code" href="structg72x__state.html#adbb9567904fa064d33382ef21d9001e8">00053</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#adbb9567904fa064d33382ef21d9001e8">dml</a>; <span class="comment">/* Long term energy estimate. */</span>
<a name="l00054"></a><a class="code" href="structg72x__state.html#ad26205671030ec76f87bf86248241b3f">00054</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#ad26205671030ec76f87bf86248241b3f">ap</a>; <span class="comment">/* Linear weighting coefficient of 'yl' and 'yu'. */</span>
<a name="l00055"></a>00055
<a name="l00056"></a><a class="code" href="structg72x__state.html#a0cb2efc8e71a7ebda36711f1bde39b7a">00056</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#a0cb2efc8e71a7ebda36711f1bde39b7a">a</a>[2]; <span class="comment">/* Coefficients of pole portion of prediction filter. */</span>
<a name="l00057"></a><a class="code" href="structg72x__state.html#a79a0dbc644fa660bc668b6c36ba1cdc1">00057</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#a79a0dbc644fa660bc668b6c36ba1cdc1">b</a>[6]; <span class="comment">/* Coefficients of zero portion of prediction filter. */</span>
<a name="l00058"></a><a class="code" href="structg72x__state.html#a0f0b967ab4c0f8289d35c4c856546916">00058</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#a0f0b967ab4c0f8289d35c4c856546916">pk</a>[2]; <span class="comment">/*</span>
<a name="l00059"></a>00059 <span class="comment"> * Signs of previous two samples of a partially</span>
<a name="l00060"></a>00060 <span class="comment"> * reconstructed signal.</span>
<a name="l00061"></a>00061 <span class="comment"> */</span>
<a name="l00062"></a><a class="code" href="structg72x__state.html#a6fb589b044f78716df5652a23d46096a">00062</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#a6fb589b044f78716df5652a23d46096a">dq</a>[6]; <span class="comment">/*</span>
<a name="l00063"></a>00063 <span class="comment"> * Previous 6 samples of the quantized difference</span>
<a name="l00064"></a>00064 <span class="comment"> * signal represented in an internal floating point</span>
<a name="l00065"></a>00065 <span class="comment"> * format.</span>
<a name="l00066"></a>00066 <span class="comment"> */</span>
<a name="l00067"></a><a class="code" href="structg72x__state.html#a56fe911169dcc64da9b6854f60a42828">00067</a> <span class="keywordtype">short</span> <a class="code" href="structg72x__state.html#a56fe911169dcc64da9b6854f60a42828">sr</a>[2]; <span class="comment">/*</span>
<a name="l00068"></a>00068 <span class="comment"> * Previous 2 samples of the quantized difference</span>
<a name="l00069"></a>00069 <span class="comment"> * signal represented in an internal floating point</span>
<a name="l00070"></a>00070 <span class="comment"> * format.</span>
<a name="l00071"></a>00071 <span class="comment"> */</span>
<a name="l00072"></a><a class="code" href="structg72x__state.html#abade7a62852e6a8ec7fc171d053da56c">00072</a> <span class="keywordtype">char</span> <a class="code" href="structg72x__state.html#abade7a62852e6a8ec7fc171d053da56c">td</a>; <span class="comment">/* delayed tone detect, new in 1988 version */</span>
<a name="l00073"></a>00073 };
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="comment">/* External function definitions. */</span>
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="keyword">extern</span> <span class="keywordtype">void</span> <a class="code" href="g72x_8h.html#a8d2e8abbe77d673980e835b3c9b45424">g72x_init_state</a>(<span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *);
<a name="l00078"></a>00078 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a625d6f20de1989da0c89725dc404c882">g721_encoder</a>(
<a name="l00079"></a>00079 <span class="keywordtype">int</span> sample,
<a name="l00080"></a>00080 <span class="keywordtype">int</span> in_coding,
<a name="l00081"></a>00081 <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00082"></a>00082 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a0ea97d583383fd8bab3f9cfe62ff8bf1">g721_decoder</a>(
<a name="l00083"></a>00083 <span class="keywordtype">int</span> code,
<a name="l00084"></a>00084 <span class="keywordtype">int</span> out_coding,
<a name="l00085"></a>00085 <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00086"></a>00086 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a2cb7ba25f04c979287a0c8c1d5c6db44">g723_24_encoder</a>(
<a name="l00087"></a>00087 <span class="keywordtype">int</span> sample,
<a name="l00088"></a>00088 <span class="keywordtype">int</span> in_coding,
<a name="l00089"></a>00089 <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00090"></a>00090 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a3b6dd79d7aaf0a9cdab1c512a14a81df">g723_24_decoder</a>(
<a name="l00091"></a>00091 <span class="keywordtype">int</span> code,
<a name="l00092"></a>00092 <span class="keywordtype">int</span> out_coding,
<a name="l00093"></a>00093 <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00094"></a>00094 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a71736718b4c7c2efab5b29a4480c6ff6">g723_40_encoder</a>(
<a name="l00095"></a>00095 <span class="keywordtype">int</span> sample,
<a name="l00096"></a>00096 <span class="keywordtype">int</span> in_coding,
<a name="l00097"></a>00097 <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00098"></a>00098 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a4f0005b001997a477f33b7b409fea743">g723_40_decoder</a>(
<a name="l00099"></a>00099 <span class="keywordtype">int</span> code,
<a name="l00100"></a>00100 <span class="keywordtype">int</span> out_coding,
<a name="l00101"></a>00101 <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00102"></a>00102
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="keyword">extern</span> <span class="keywordtype">int</span>
<a name="l00105"></a>00105 <a class="code" href="g72x_8h.html#a79ca4858023b4e424e93f50469d12bff">quantize</a>(
<a name="l00106"></a>00106 <span class="keywordtype">int</span> d,
<a name="l00107"></a>00107 <span class="keywordtype">int</span> y,
<a name="l00108"></a>00108 <span class="keywordtype">short</span> *table,
<a name="l00109"></a>00109 <span class="keywordtype">int</span> size);
<a name="l00110"></a>00110 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a79fa39807a35066c338c5a297e89fbed">reconstruct</a>(<span class="keywordtype">int</span>,<span class="keywordtype">int</span>,<span class="keywordtype">int</span>);<span class="keywordtype">void</span>
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keyword">extern</span> <a class="code" href="g72x_8h.html#a6e07fabf2aa75120f6124fe33d667b1e">update</a>(
<a name="l00113"></a>00113 <span class="keywordtype">int</span> code_size,
<a name="l00114"></a>00114 <span class="keywordtype">int</span> y,
<a name="l00115"></a>00115 <span class="keywordtype">int</span> wi,
<a name="l00116"></a>00116 <span class="keywordtype">int</span> fi,
<a name="l00117"></a>00117 <span class="keywordtype">int</span> dq,
<a name="l00118"></a>00118 <span class="keywordtype">int</span> sr,
<a name="l00119"></a>00119 <span class="keywordtype">int</span> dqsez,
<a name="l00120"></a>00120 <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00121"></a>00121 <span class="keyword">extern</span> <span class="keywordtype">int</span>
<a name="l00122"></a>00122 <a class="code" href="g72x_8h.html#a815b5e5cddffee7896fe2bc17e64ee55">tandem_adjust_alaw</a>(
<a name="l00123"></a>00123 <span class="keywordtype">int</span> sr,
<a name="l00124"></a>00124 <span class="keywordtype">int</span> se,
<a name="l00125"></a>00125 <span class="keywordtype">int</span> y,
<a name="l00126"></a>00126 <span class="keywordtype">int</span> i,
<a name="l00127"></a>00127 <span class="keywordtype">int</span> sign,
<a name="l00128"></a>00128 <span class="keywordtype">short</span> *qtab);
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="keyword">extern</span> <span class="keywordtype">int</span>
<a name="l00131"></a>00131 <a class="code" href="g72x_8h.html#aab32bf499fa99d9eff6983558dc8f3db">tandem_adjust_ulaw</a>(
<a name="l00132"></a>00132 <span class="keywordtype">int</span> sr,
<a name="l00133"></a>00133 <span class="keywordtype">int</span> se,
<a name="l00134"></a>00134 <span class="keywordtype">int</span> y,
<a name="l00135"></a>00135 <span class="keywordtype">int</span> i,
<a name="l00136"></a>00136 <span class="keywordtype">int</span> sign,
<a name="l00137"></a>00137 <span class="keywordtype">short</span> *qtab);
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>
<a name="l00140"></a>00140 <a class="code" href="g72x_8h.html#af9d8389f455e033063e060eaee13d0b6">linear2alaw</a>(
<a name="l00141"></a>00141 <span class="keywordtype">int</span> pcm_val);
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="keyword">extern</span> <span class="keywordtype">int</span>
<a name="l00144"></a>00144 <a class="code" href="g72x_8h.html#ac3e8657430e0cf4d01f64e02d3a0174e">alaw2linear</a>(
<a name="l00145"></a>00145 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> a_val);
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keyword">extern</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>
<a name="l00148"></a>00148 <a class="code" href="g72x_8h.html#aca914334f18c15611c26a35bfe134d98">linear2ulaw</a>(<span class="keywordtype">int</span> pcm_val);
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a1457df76b3c6cf4b48d69a7789e123de">ulaw2linear</a>( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> u_val);
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a435e4fe3c48bc271d39d4f23cd0fba59">predictor_zero</a>(<span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#ace46ad254b15fb2406f51a6eec0e0d13">predictor_pole</a>( <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00155"></a>00155 <span class="keyword">extern</span> <span class="keywordtype">int</span> <a class="code" href="g72x_8h.html#a9a7e6c17fe2acfcdae3b7097731366e5">step_size</a>( <span class="keyword">struct</span> <a class="code" href="structg72x__state.html">g72x_state</a> *state_ptr);
<a name="l00156"></a>00156 <span class="preprocessor">#endif </span><span class="comment">/* !_G72X_H */</span>
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