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<h1>src/libsphinxbase/fe/fe_interface.c</h1> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/* ====================================================================</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 1996-2004 Carnegie Mellon University. All rights </span>
<a name="l00004"></a>00004 <span class="comment"> * reserved.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00008"></a>00008 <span class="comment"> * are met:</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00014"></a>00014 <span class="comment"> * notice, this list of conditions and the following disclaimer in</span>
<a name="l00015"></a>00015 <span class="comment"> * the documentation and/or other materials provided with the</span>
<a name="l00016"></a>00016 <span class="comment"> * distribution.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span>
<a name="l00019"></a>00019 <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span>
<a name="l00020"></a>00020 <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span>
<a name="l00023"></a>00023 <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span>
<a name="l00024"></a>00024 <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00025"></a>00025 <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span>
<a name="l00026"></a>00026 <span class="comment"> * NOR ITS EMPLOYEES 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 <span class="comment"> * ====================================================================</span>
<a name="l00035"></a>00035 <span class="comment"> *</span>
<a name="l00036"></a>00036 <span class="comment"> */</span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <stdio.h></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <string.h></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include <math.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include <assert.h></span>
<a name="l00042"></a>00042 <span class="preprocessor">#ifdef _WIN32_WCE</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span>
<a name="l00044"></a>00044 <span class="preprocessor">#else</span>
<a name="l00045"></a>00045 <span class="preprocessor"></span><span class="preprocessor">#include <time.h></span>
<a name="l00046"></a>00046 <span class="preprocessor">#endif</span>
<a name="l00047"></a>00047 <span class="preprocessor"></span>
<a name="l00048"></a>00048 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span><span class="preprocessor">#include <config.h></span>
<a name="l00050"></a>00050 <span class="preprocessor">#endif</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span>
<a name="l00052"></a>00052 <span class="preprocessor">#include "sphinxbase/prim_type.h"</span>
<a name="l00053"></a>00053 <span class="preprocessor">#include "sphinxbase/byteorder.h"</span>
<a name="l00054"></a>00054 <span class="preprocessor">#include "sphinxbase/fixpoint.h"</span>
<a name="l00055"></a>00055 <span class="preprocessor">#include "sphinxbase/genrand.h"</span>
<a name="l00056"></a>00056 <span class="preprocessor">#include "sphinxbase/err.h"</span>
<a name="l00057"></a>00057 <span class="preprocessor">#include "sphinxbase/cmd_ln.h"</span>
<a name="l00058"></a>00058 <span class="preprocessor">#include "sphinxbase/ckd_alloc.h"</span>
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="preprocessor">#include "fe_internal.h"</span>
<a name="l00061"></a>00061 <span class="preprocessor">#include "fe_warp.h"</span>
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="structarg__t.html" title="Argument definition structure.">arg_t</a> fe_args[] = {
<a name="l00064"></a>00064 waveform_to_cepstral_command_line_macro(),
<a name="l00065"></a>00065 { NULL, 0, NULL, NULL }
<a name="l00066"></a>00066 };
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="keywordtype">int</span>
<a name="l00069"></a>00069 fe_parse_general_params(<a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *config, <a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 <span class="keywordtype">int</span> j;
<a name="l00072"></a>00072
<a name="l00073"></a>00073 fe->config = config;
<a name="l00074"></a>00074 fe->sampling_rate = cmd_ln_float32_r(config, <span class="stringliteral">"-samprate"</span>);
<a name="l00075"></a>00075 fe->frame_rate = (int16)cmd_ln_int32_r(config, <span class="stringliteral">"-frate"</span>);
<a name="l00076"></a>00076 <span class="keywordflow">if</span> (<a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-dither"</span>)) {
<a name="l00077"></a>00077 fe->dither = 1;
<a name="l00078"></a>00078 fe->seed = cmd_ln_int32_r(config, <span class="stringliteral">"-seed"</span>);
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 <span class="preprocessor">#ifdef WORDS_BIGENDIAN</span>
<a name="l00081"></a>00081 <span class="preprocessor"></span> fe->swap = strcmp(<span class="stringliteral">"big"</span>, <a class="code" href="cmd__ln_8h.html#af0aa15288e06fc8271298e4fa7cdc91a" title="Retrieve a string from a command-line object.">cmd_ln_str_r</a>(config, <span class="stringliteral">"-input_endian"</span>)) == 0 ? 0 : 1;
<a name="l00082"></a>00082 <span class="preprocessor">#else </span>
<a name="l00083"></a>00083 <span class="preprocessor"></span> fe->swap = strcmp(<span class="stringliteral">"little"</span>, <a class="code" href="cmd__ln_8h.html#af0aa15288e06fc8271298e4fa7cdc91a" title="Retrieve a string from a command-line object.">cmd_ln_str_r</a>(config, <span class="stringliteral">"-input_endian"</span>)) == 0 ? 0 : 1;
<a name="l00084"></a>00084 <span class="preprocessor">#endif</span>
<a name="l00085"></a>00085 <span class="preprocessor"></span> fe->window_length = cmd_ln_float32_r(config, <span class="stringliteral">"-wlen"</span>);
<a name="l00086"></a>00086 fe->pre_emphasis_alpha = cmd_ln_float32_r(config, <span class="stringliteral">"-alpha"</span>);
<a name="l00087"></a>00087
<a name="l00088"></a>00088 fe->num_cepstra = (uint8)cmd_ln_int32_r(config, <span class="stringliteral">"-ncep"</span>);
<a name="l00089"></a>00089 fe->fft_size = (int16)cmd_ln_int32_r(config, <span class="stringliteral">"-nfft"</span>);
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="comment">/* Check FFT size, compute FFT order (log_2(n)) */</span>
<a name="l00092"></a>00092 <span class="keywordflow">for</span> (j = fe->fft_size, fe->fft_order = 0; j > 1; j >>= 1, fe->fft_order++) {
<a name="l00093"></a>00093 <span class="keywordflow">if</span> (((j % 2) != 0) || (fe->fft_size <= 0)) {
<a name="l00094"></a>00094 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"fft: number of points must be a power of 2 (is %d)\n"</span>,
<a name="l00095"></a>00095 fe->fft_size);
<a name="l00096"></a>00096 <span class="keywordflow">return</span> -1;
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 <span class="comment">/* Verify that FFT size is greater or equal to window length. */</span>
<a name="l00100"></a>00100 <span class="keywordflow">if</span> (fe->fft_size < (<span class="keywordtype">int</span>)(fe->window_length * fe->sampling_rate)) {
<a name="l00101"></a>00101 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"FFT: Number of points must be greater or equal to frame size (%d samples)\n"</span>,
<a name="l00102"></a>00102 (<span class="keywordtype">int</span>)(fe->window_length * fe->sampling_rate));
<a name="l00103"></a>00103 <span class="keywordflow">return</span> -1;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a>00106 fe->remove_dc = <a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-remove_dc"</span>);
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (0 == strcmp(<a class="code" href="cmd__ln_8h.html#af0aa15288e06fc8271298e4fa7cdc91a" title="Retrieve a string from a command-line object.">cmd_ln_str_r</a>(config, <span class="stringliteral">"-transform"</span>), <span class="stringliteral">"dct"</span>))
<a name="l00109"></a>00109 fe->transform = DCT_II;
<a name="l00110"></a>00110 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (0 == strcmp(<a class="code" href="cmd__ln_8h.html#af0aa15288e06fc8271298e4fa7cdc91a" title="Retrieve a string from a command-line object.">cmd_ln_str_r</a>(config, <span class="stringliteral">"-transform"</span>), <span class="stringliteral">"legacy"</span>))
<a name="l00111"></a>00111 fe->transform = LEGACY_DCT;
<a name="l00112"></a>00112 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (0 == strcmp(<a class="code" href="cmd__ln_8h.html#af0aa15288e06fc8271298e4fa7cdc91a" title="Retrieve a string from a command-line object.">cmd_ln_str_r</a>(config, <span class="stringliteral">"-transform"</span>), <span class="stringliteral">"htk"</span>))
<a name="l00113"></a>00113 fe->transform = DCT_HTK;
<a name="l00114"></a>00114 <span class="keywordflow">else</span> {
<a name="l00115"></a>00115 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"Invalid transform type (values are 'dct', 'legacy', 'htk')\n"</span>);
<a name="l00116"></a>00116 <span class="keywordflow">return</span> -1;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="keywordflow">if</span> (<a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-logspec"</span>))
<a name="l00120"></a>00120 fe->log_spec = RAW_LOG_SPEC;
<a name="l00121"></a>00121 <span class="keywordflow">if</span> (<a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-smoothspec"</span>))
<a name="l00122"></a>00122 fe->log_spec = SMOOTH_LOG_SPEC;
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="keywordflow">return</span> 0;
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keyword">static</span> <span class="keywordtype">int</span>
<a name="l00128"></a>00128 fe_parse_melfb_params(<a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *config, <a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *fe, <a class="code" href="structmelfb__s.html" title="Base Struct to hold all structure for MFCC computation.">melfb_t</a> * mel)
<a name="l00129"></a>00129 {
<a name="l00130"></a>00130 mel->sampling_rate = fe->sampling_rate;
<a name="l00131"></a>00131 mel->fft_size = fe->fft_size;
<a name="l00132"></a>00132 mel->num_cepstra = fe->num_cepstra;
<a name="l00133"></a>00133 mel->num_filters = cmd_ln_int32_r(config, <span class="stringliteral">"-nfilt"</span>);
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (fe->log_spec)
<a name="l00136"></a>00136 fe->feature_dimension = mel->num_filters;
<a name="l00137"></a>00137 <span class="keywordflow">else</span>
<a name="l00138"></a>00138 fe->feature_dimension = fe->num_cepstra;
<a name="l00139"></a>00139
<a name="l00140"></a>00140 mel->upper_filt_freq = cmd_ln_float32_r(config, <span class="stringliteral">"-upperf"</span>);
<a name="l00141"></a>00141 mel->lower_filt_freq = cmd_ln_float32_r(config, <span class="stringliteral">"-lowerf"</span>);
<a name="l00142"></a>00142
<a name="l00143"></a>00143 mel->doublewide = <a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-doublebw"</span>);
<a name="l00144"></a>00144
<a name="l00145"></a>00145 mel->warp_type = <a class="code" href="cmd__ln_8h.html#af0aa15288e06fc8271298e4fa7cdc91a" title="Retrieve a string from a command-line object.">cmd_ln_str_r</a>(config, <span class="stringliteral">"-warp_type"</span>);
<a name="l00146"></a>00146 mel->warp_params = <a class="code" href="cmd__ln_8h.html#af0aa15288e06fc8271298e4fa7cdc91a" title="Retrieve a string from a command-line object.">cmd_ln_str_r</a>(config, <span class="stringliteral">"-warp_params"</span>);
<a name="l00147"></a>00147 mel->lifter_val = cmd_ln_int32_r(config, <span class="stringliteral">"-lifter"</span>);
<a name="l00148"></a>00148
<a name="l00149"></a>00149 mel->unit_area = <a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-unit_area"</span>);
<a name="l00150"></a>00150 mel->round_filters = <a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-round_filters"</span>);
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="keywordflow">if</span> (fe_warp_set(mel, mel->warp_type) != FE_SUCCESS) {
<a name="l00153"></a>00153 <a class="code" href="err_8h.html#a5f7b2f58f5a663a6bdd51f197ae21993" title="Print error message to standard error stream.">E_ERROR</a>(<span class="stringliteral">"Failed to initialize the warping function.\n"</span>);
<a name="l00154"></a>00154 <span class="keywordflow">return</span> -1;
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156 fe_warp_set_parameters(mel, mel->warp_params, mel->sampling_rate);
<a name="l00157"></a>00157 <span class="keywordflow">return</span> 0;
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <span class="keywordtype">void</span>
<a name="l00161"></a>00161 fe_print_current(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> <span class="keyword">const</span> *fe)
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Current FE Parameters:\n"</span>);
<a name="l00164"></a>00164 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tSampling Rate: %f\n"</span>, fe->sampling_rate);
<a name="l00165"></a>00165 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tFrame Size: %d\n"</span>, fe->frame_size);
<a name="l00166"></a>00166 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tFrame Shift: %d\n"</span>, fe->frame_shift);
<a name="l00167"></a>00167 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tFFT Size: %d\n"</span>, fe->fft_size);
<a name="l00168"></a>00168 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tLower Frequency: %g\n"</span>,
<a name="l00169"></a>00169 fe->mel_fb->lower_filt_freq);
<a name="l00170"></a>00170 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tUpper Frequency: %g\n"</span>,
<a name="l00171"></a>00171 fe->mel_fb->upper_filt_freq);
<a name="l00172"></a>00172 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tNumber of filters: %d\n"</span>, fe->mel_fb->num_filters);
<a name="l00173"></a>00173 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tNumber of Overflow Samps: %d\n"</span>, fe->num_overflow_samps);
<a name="l00174"></a>00174 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"\tStart Utt Status: %d\n"</span>, fe->start_flag);
<a name="l00175"></a>00175 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Will %sremove DC offset at frame level\n"</span>,
<a name="l00176"></a>00176 fe->remove_dc ? <span class="stringliteral">""</span> : <span class="stringliteral">"not "</span>);
<a name="l00177"></a>00177 <span class="keywordflow">if</span> (fe->dither) {
<a name="l00178"></a>00178 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Will add dither to audio\n"</span>);
<a name="l00179"></a>00179 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Dither seeded with %d\n"</span>, fe->seed);
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181 <span class="keywordflow">else</span> {
<a name="l00182"></a>00182 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Will not add dither to audio\n"</span>);
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184 <span class="keywordflow">if</span> (fe->mel_fb->lifter_val) {
<a name="l00185"></a>00185 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Will apply sine-curve liftering, period %d\n"</span>,
<a name="l00186"></a>00186 fe->mel_fb->lifter_val);
<a name="l00187"></a>00187 }
<a name="l00188"></a>00188 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Will %snormalize filters to unit area\n"</span>,
<a name="l00189"></a>00189 fe->mel_fb->unit_area ? <span class="stringliteral">""</span> : <span class="stringliteral">"not "</span>);
<a name="l00190"></a>00190 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Will %sround filter frequencies to DFT points\n"</span>,
<a name="l00191"></a>00191 fe->mel_fb->round_filters ? <span class="stringliteral">""</span> : <span class="stringliteral">"not "</span>);
<a name="l00192"></a>00192 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"Will %suse double bandwidth in mel filter\n"</span>,
<a name="l00193"></a>00193 fe->mel_fb->doublewide ? <span class="stringliteral">""</span> : <span class="stringliteral">"not "</span>);
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *
<a name="l00197"></a>00197 fe_init_auto()
<a name="l00198"></a>00198 {
<a name="l00199"></a>00199 <span class="keywordflow">return</span> fe_init_auto_r(<a class="code" href="cmd__ln_8h.html#a975f5bf7b6f4fc95f426d1979281f73b" title="Retain ownership of a command-line argument set.">cmd_ln_retain</a>(<a class="code" href="cmd__ln_8h.html#a6e10003b5e86ec317c1b78c0655972af" title="Retrieve the global cmd_ln_t object used by non-re-entrant functions.">cmd_ln_get</a>()));
<a name="l00200"></a>00200 }
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *
<a name="l00203"></a>00203 fe_init_auto_r(<a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *config)
<a name="l00204"></a>00204 {
<a name="l00205"></a>00205 <a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *fe;
<a name="l00206"></a>00206
<a name="l00207"></a>00207 fe = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*fe));
<a name="l00208"></a>00208 fe->refcount = 1;
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="comment">/* transfer params to front end */</span>
<a name="l00211"></a>00211 <span class="keywordflow">if</span> (fe_parse_general_params(config, fe) < 0) {
<a name="l00212"></a>00212 fe_free(fe);
<a name="l00213"></a>00213 <span class="keywordflow">return</span> NULL;
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215
<a name="l00216"></a>00216 <span class="comment">/* compute remaining fe parameters */</span>
<a name="l00217"></a>00217 <span class="comment">/* We add 0.5 so approximate the float with the closest</span>
<a name="l00218"></a>00218 <span class="comment"> * integer. E.g., 2.3 is truncate to 2, whereas 3.7 becomes 4</span>
<a name="l00219"></a>00219 <span class="comment"> */</span>
<a name="l00220"></a>00220 fe->frame_shift = (int32) (fe->sampling_rate / fe->frame_rate + 0.5);
<a name="l00221"></a>00221 fe->frame_size = (int32) (fe->window_length * fe->sampling_rate + 0.5);
<a name="l00222"></a>00222 fe->prior = 0;
<a name="l00223"></a>00223 fe->frame_counter = 0;
<a name="l00224"></a>00224
<a name="l00225"></a>00225 <span class="keywordflow">if</span> (fe->frame_size > (fe->fft_size)) {
<a name="l00226"></a>00226 <a class="code" href="err_8h.html#a6a794bec721b555ac1f2167f9e12f662" title="Print warning information to standard error stream.">E_WARN</a>
<a name="l00227"></a>00227 (<span class="stringliteral">"Number of FFT points has to be a power of 2 higher than %d\n"</span>,
<a name="l00228"></a>00228 (fe->frame_size));
<a name="l00229"></a>00229 fe_free(fe);
<a name="l00230"></a>00230 <span class="keywordflow">return</span> (NULL);
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232
<a name="l00233"></a>00233 <span class="keywordflow">if</span> (fe->dither)
<a name="l00234"></a>00234 fe_init_dither(fe->seed);
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="comment">/* establish buffers for overflow samps and hamming window */</span>
<a name="l00237"></a>00237 fe->overflow_samps = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->frame_size, <span class="keyword">sizeof</span>(int16));
<a name="l00238"></a>00238 fe->hamming_window = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->frame_size/2, <span class="keyword">sizeof</span>(window_t));
<a name="l00239"></a>00239
<a name="l00240"></a>00240 <span class="comment">/* create hamming window */</span>
<a name="l00241"></a>00241 fe_create_hamming(fe->hamming_window, fe->frame_size);
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="comment">/* init and fill appropriate filter structure */</span>
<a name="l00244"></a>00244 fe->mel_fb = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(1, <span class="keyword">sizeof</span>(*fe->mel_fb));
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <span class="comment">/* transfer params to mel fb */</span>
<a name="l00247"></a>00247 fe_parse_melfb_params(config, fe, fe->mel_fb);
<a name="l00248"></a>00248 fe_build_melfilters(fe->mel_fb);
<a name="l00249"></a>00249 fe_compute_melcosine(fe->mel_fb);
<a name="l00250"></a>00250
<a name="l00251"></a>00251 <span class="comment">/* Create temporary FFT, spectrum and mel-spectrum buffers. */</span>
<a name="l00252"></a>00252 <span class="comment">/* FIXME: Gosh there are a lot of these. */</span>
<a name="l00253"></a>00253 fe->spch = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->frame_size, <span class="keyword">sizeof</span>(*fe->spch));
<a name="l00254"></a>00254 fe->frame = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->fft_size, <span class="keyword">sizeof</span>(*fe->frame));
<a name="l00255"></a>00255 fe->spec = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->fft_size, <span class="keyword">sizeof</span>(*fe->spec));
<a name="l00256"></a>00256 fe->mfspec = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->mel_fb->num_filters, <span class="keyword">sizeof</span>(*fe->mfspec));
<a name="l00257"></a>00257
<a name="l00258"></a>00258 <span class="comment">/* create twiddle factors */</span>
<a name="l00259"></a>00259 fe->ccc = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->fft_size / 4, <span class="keyword">sizeof</span>(*fe->ccc));
<a name="l00260"></a>00260 fe->sss = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(fe->fft_size / 4, <span class="keyword">sizeof</span>(*fe->sss));
<a name="l00261"></a>00261 fe_create_twiddle(fe);
<a name="l00262"></a>00262
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (<a class="code" href="cmd__ln_8h.html#a159e691c95089689cf9a8f85a67830a6" title="Retrieve a boolean value from a command-line object.">cmd_ln_boolean_r</a>(config, <span class="stringliteral">"-verbose"</span>)) {
<a name="l00264"></a>00264 fe_print_current(fe);
<a name="l00265"></a>00265 }
<a name="l00266"></a>00266
<a name="l00267"></a>00267 <span class="comment">/*** Z.A.B. ***/</span>
<a name="l00268"></a>00268 <span class="comment">/*** Initialize the overflow buffers ***/</span>
<a name="l00269"></a>00269 fe_start_utt(fe);
<a name="l00270"></a>00270 <span class="keywordflow">return</span> fe;
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <a class="code" href="structarg__t.html" title="Argument definition structure.">arg_t</a> <span class="keyword">const</span> *
<a name="l00274"></a>00274 fe_get_args(<span class="keywordtype">void</span>)
<a name="l00275"></a>00275 {
<a name="l00276"></a>00276 <span class="keywordflow">return</span> fe_args;
<a name="l00277"></a>00277 }
<a name="l00278"></a>00278
<a name="l00279"></a>00279 <a class="code" href="structcmd__ln__t.html" title="Opaque structure used to hold the results of command-line parsing.">cmd_ln_t</a> *
<a name="l00280"></a>00280 fe_get_config(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *fe)
<a name="l00281"></a>00281 {
<a name="l00282"></a>00282 <span class="keywordflow">return</span> fe->config;
<a name="l00283"></a>00283 }
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="keywordtype">void</span>
<a name="l00286"></a>00286 fe_init_dither(int32 seed)
<a name="l00287"></a>00287 {
<a name="l00288"></a>00288 <span class="keywordflow">if</span> (seed < 0) {
<a name="l00289"></a>00289 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"You are using the internal mechanism to generate the seed.\n"</span>);
<a name="l00290"></a>00290 <span class="preprocessor">#ifdef _WIN32_WCE</span>
<a name="l00291"></a>00291 <span class="preprocessor"></span> <a class="code" href="genrand_8h.html#a88ed88daecb88e115d8559c1b0a09bb7" title="Macros to simplify calling of random generator function.">s3_rand_seed</a>(GetTickCount());
<a name="l00292"></a>00292 <span class="preprocessor">#else</span>
<a name="l00293"></a>00293 <span class="preprocessor"></span> <a class="code" href="genrand_8h.html#a88ed88daecb88e115d8559c1b0a09bb7" title="Macros to simplify calling of random generator function.">s3_rand_seed</a>((<span class="keywordtype">long</span>) time(0));
<a name="l00294"></a>00294 <span class="preprocessor">#endif</span>
<a name="l00295"></a>00295 <span class="preprocessor"></span> }
<a name="l00296"></a>00296 <span class="keywordflow">else</span> {
<a name="l00297"></a>00297 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"You are using %d as the seed.\n"</span>, seed);
<a name="l00298"></a>00298 <a class="code" href="genrand_8h.html#a88ed88daecb88e115d8559c1b0a09bb7" title="Macros to simplify calling of random generator function.">s3_rand_seed</a>(seed);
<a name="l00299"></a>00299 }
<a name="l00300"></a>00300 }
<a name="l00301"></a>00301
<a name="l00302"></a>00302 int32
<a name="l00303"></a>00303 fe_start_utt(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe)
<a name="l00304"></a>00304 {
<a name="l00305"></a>00305 fe->num_overflow_samps = 0;
<a name="l00306"></a>00306 memset(fe->overflow_samps, 0, fe->frame_size * <span class="keyword">sizeof</span>(int16));
<a name="l00307"></a>00307 fe->start_flag = 1;
<a name="l00308"></a>00308 fe->prior = 0;
<a name="l00309"></a>00309 <span class="keywordflow">return</span> 0;
<a name="l00310"></a>00310 }
<a name="l00311"></a>00311
<a name="l00312"></a>00312 <span class="keywordtype">int</span>
<a name="l00313"></a>00313 fe_get_output_size(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *fe)
<a name="l00314"></a>00314 {
<a name="l00315"></a>00315 <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)fe->feature_dimension;
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="keywordtype">void</span>
<a name="l00319"></a>00319 fe_get_input_size(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *fe, <span class="keywordtype">int</span> *out_frame_shift,
<a name="l00320"></a>00320 <span class="keywordtype">int</span> *out_frame_size)
<a name="l00321"></a>00321 {
<a name="l00322"></a>00322 <span class="keywordflow">if</span> (out_frame_shift)
<a name="l00323"></a>00323 *out_frame_shift = fe->frame_shift;
<a name="l00324"></a>00324 <span class="keywordflow">if</span> (out_frame_size)
<a name="l00325"></a>00325 *out_frame_size = fe->frame_size;
<a name="l00326"></a>00326 }
<a name="l00327"></a>00327
<a name="l00328"></a>00328 int32
<a name="l00329"></a>00329 fe_process_frame(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe, int16 <span class="keyword">const</span> *spch, int32 nsamps, mfcc_t * fr_cep)
<a name="l00330"></a>00330 {
<a name="l00331"></a>00331 fe_read_frame(fe, spch, nsamps);
<a name="l00332"></a>00332 <span class="keywordflow">return</span> fe_write_frame(fe, fr_cep);
<a name="l00333"></a>00333 }
<a name="l00334"></a>00334
<a name="l00335"></a>00335 <span class="keywordtype">int</span>
<a name="l00336"></a>00336 fe_process_frames(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *fe,
<a name="l00337"></a>00337 int16 <span class="keyword">const</span> **inout_spch,
<a name="l00338"></a>00338 <span class="keywordtype">size_t</span> *inout_nsamps,
<a name="l00339"></a>00339 mfcc_t **buf_cep,
<a name="l00340"></a>00340 int32 *inout_nframes)
<a name="l00341"></a>00341 {
<a name="l00342"></a>00342 int32 frame_count;
<a name="l00343"></a>00343 <span class="keywordtype">int</span> outidx, i, n, n_overflow, orig_n_overflow;
<a name="l00344"></a>00344 int16 <span class="keyword">const</span> *orig_spch;
<a name="l00345"></a>00345
<a name="l00346"></a>00346 <span class="comment">/* In the special case where there is no output buffer, return the</span>
<a name="l00347"></a>00347 <span class="comment"> * maximum number of frames which would be generated. */</span>
<a name="l00348"></a>00348 <span class="keywordflow">if</span> (buf_cep == NULL) {
<a name="l00349"></a>00349 <span class="keywordflow">if</span> (*inout_nsamps + fe->num_overflow_samps < (<span class="keywordtype">size_t</span>)fe->frame_size)
<a name="l00350"></a>00350 *inout_nframes = 0;
<a name="l00351"></a>00351 <span class="keywordflow">else</span>
<a name="l00352"></a>00352 *inout_nframes = 1
<a name="l00353"></a>00353 + ((*inout_nsamps + fe->num_overflow_samps - fe->frame_size)
<a name="l00354"></a>00354 / fe->frame_shift);
<a name="l00355"></a>00355 <span class="keywordflow">return</span> *inout_nframes;
<a name="l00356"></a>00356 }
<a name="l00357"></a>00357
<a name="l00358"></a>00358 <span class="comment">/* Are there not enough samples to make at least 1 frame? */</span>
<a name="l00359"></a>00359 <span class="keywordflow">if</span> (*inout_nsamps + fe->num_overflow_samps < (<span class="keywordtype">size_t</span>)fe->frame_size) {
<a name="l00360"></a>00360 <span class="keywordflow">if</span> (*inout_nsamps > 0) {
<a name="l00361"></a>00361 <span class="comment">/* Append them to the overflow buffer. */</span>
<a name="l00362"></a>00362 memcpy(fe->overflow_samps + fe->num_overflow_samps,
<a name="l00363"></a>00363 *inout_spch, *inout_nsamps * (<span class="keyword">sizeof</span>(int16)));
<a name="l00364"></a>00364 fe->num_overflow_samps += *inout_nsamps;
<a name="l00365"></a>00365 <span class="comment">/* Update input-output pointers and counters. */</span>
<a name="l00366"></a>00366 *inout_spch += *inout_nsamps;
<a name="l00367"></a>00367 *inout_nsamps = 0;
<a name="l00368"></a>00368 }
<a name="l00369"></a>00369 <span class="comment">/* We produced no frames of output, sorry! */</span>
<a name="l00370"></a>00370 *inout_nframes = 0;
<a name="l00371"></a>00371 <span class="keywordflow">return</span> 0;
<a name="l00372"></a>00372 }
<a name="l00373"></a>00373
<a name="l00374"></a>00374 <span class="comment">/* Can't write a frame? Then do nothing! */</span>
<a name="l00375"></a>00375 <span class="keywordflow">if</span> (*inout_nframes < 1) {
<a name="l00376"></a>00376 *inout_nframes = 0;
<a name="l00377"></a>00377 <span class="keywordflow">return</span> 0;
<a name="l00378"></a>00378 }
<a name="l00379"></a>00379
<a name="l00380"></a>00380 <span class="comment">/* Keep track of the original start of the buffer. */</span>
<a name="l00381"></a>00381 orig_spch = *inout_spch;
<a name="l00382"></a>00382 orig_n_overflow = fe->num_overflow_samps;
<a name="l00383"></a>00383 <span class="comment">/* How many frames will we be able to get? */</span>
<a name="l00384"></a>00384 frame_count = 1
<a name="l00385"></a>00385 + ((*inout_nsamps + fe->num_overflow_samps - fe->frame_size)
<a name="l00386"></a>00386 / fe->frame_shift);
<a name="l00387"></a>00387 <span class="comment">/* Limit it to the number of output frames available. */</span>
<a name="l00388"></a>00388 <span class="keywordflow">if</span> (frame_count > *inout_nframes)
<a name="l00389"></a>00389 frame_count = *inout_nframes;
<a name="l00390"></a>00390 <span class="comment">/* Index of output frame. */</span>
<a name="l00391"></a>00391 outidx = 0;
<a name="l00392"></a>00392
<a name="l00393"></a>00393 <span class="comment">/* Start processing, taking care of any incoming overflow. */</span>
<a name="l00394"></a>00394 <span class="keywordflow">if</span> (fe->num_overflow_samps) {
<a name="l00395"></a>00395 <span class="keywordtype">int</span> offset = fe->frame_size - fe->num_overflow_samps;
<a name="l00396"></a>00396
<a name="l00397"></a>00397 <span class="comment">/* Append start of spch to overflow samples to make a full frame. */</span>
<a name="l00398"></a>00398 memcpy(fe->overflow_samps + fe->num_overflow_samps,
<a name="l00399"></a>00399 *inout_spch, offset * <span class="keyword">sizeof</span>(**inout_spch));
<a name="l00400"></a>00400 fe_read_frame(fe, fe->overflow_samps, fe->frame_size);
<a name="l00401"></a>00401 assert(outidx < frame_count);
<a name="l00402"></a>00402 <span class="keywordflow">if</span> ((n = fe_write_frame(fe, buf_cep[outidx])) < 0)
<a name="l00403"></a>00403 <span class="keywordflow">return</span> -1;
<a name="l00404"></a>00404 outidx += n;
<a name="l00405"></a>00405 <span class="comment">/* Update input-output pointers and counters. */</span>
<a name="l00406"></a>00406 *inout_spch += offset;
<a name="l00407"></a>00407 *inout_nsamps -= offset;
<a name="l00408"></a>00408 fe->num_overflow_samps -= fe->frame_shift;
<a name="l00409"></a>00409 }
<a name="l00410"></a>00410 <span class="keywordflow">else</span> {
<a name="l00411"></a>00411 fe_read_frame(fe, *inout_spch, fe->frame_size);
<a name="l00412"></a>00412 assert(outidx < frame_count);
<a name="l00413"></a>00413 <span class="keywordflow">if</span> ((n = fe_write_frame(fe, buf_cep[outidx])) < 0)
<a name="l00414"></a>00414 <span class="keywordflow">return</span> -1;
<a name="l00415"></a>00415 outidx += n;
<a name="l00416"></a>00416 <span class="comment">/* Update input-output pointers and counters. */</span>
<a name="l00417"></a>00417 *inout_spch += fe->frame_size;
<a name="l00418"></a>00418 *inout_nsamps -= fe->frame_size;
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420
<a name="l00421"></a>00421 <span class="comment">/* Process all remaining frames. */</span>
<a name="l00422"></a>00422 <span class="keywordflow">for</span> (i = 1; i < frame_count; ++i) {
<a name="l00423"></a>00423 assert(*inout_nsamps >= (<span class="keywordtype">size_t</span>)fe->frame_shift);
<a name="l00424"></a>00424
<a name="l00425"></a>00425 fe_shift_frame(fe, *inout_spch, fe->frame_shift);
<a name="l00426"></a>00426 assert(outidx < frame_count);
<a name="l00427"></a>00427 <span class="keywordflow">if</span> ((n = fe_write_frame(fe, buf_cep[outidx])) < 0)
<a name="l00428"></a>00428 <span class="keywordflow">return</span> -1;
<a name="l00429"></a>00429 outidx += n;
<a name="l00430"></a>00430 <span class="comment">/* Update input-output pointers and counters. */</span>
<a name="l00431"></a>00431 *inout_spch += fe->frame_shift;
<a name="l00432"></a>00432 *inout_nsamps -= fe->frame_shift;
<a name="l00433"></a>00433 <span class="comment">/* Amount of data behind the original input which is still needed. */</span>
<a name="l00434"></a>00434 <span class="keywordflow">if</span> (fe->num_overflow_samps > 0)
<a name="l00435"></a>00435 fe->num_overflow_samps -= fe->frame_shift;
<a name="l00436"></a>00436 }
<a name="l00437"></a>00437
<a name="l00438"></a>00438 <span class="comment">/* How many relevant overflow samples are there left? */</span>
<a name="l00439"></a>00439 <span class="keywordflow">if</span> (fe->num_overflow_samps <= 0) {
<a name="l00440"></a>00440 <span class="comment">/* Maximum number of overflow samples past *inout_spch to save. */</span>
<a name="l00441"></a>00441 n_overflow = *inout_nsamps;
<a name="l00442"></a>00442 <span class="keywordflow">if</span> (n_overflow > fe->frame_shift)
<a name="l00443"></a>00443 n_overflow = fe->frame_shift;
<a name="l00444"></a>00444 fe->num_overflow_samps = fe->frame_size - fe->frame_shift;
<a name="l00445"></a>00445 <span class="comment">/* Make sure this isn't an illegal read! */</span>
<a name="l00446"></a>00446 <span class="keywordflow">if</span> (fe->num_overflow_samps > *inout_spch - orig_spch)
<a name="l00447"></a>00447 fe->num_overflow_samps = *inout_spch - orig_spch;
<a name="l00448"></a>00448 fe->num_overflow_samps += n_overflow;
<a name="l00449"></a>00449 <span class="keywordflow">if</span> (fe->num_overflow_samps > 0) {
<a name="l00450"></a>00450 memcpy(fe->overflow_samps,
<a name="l00451"></a>00451 *inout_spch - (fe->frame_size - fe->frame_shift),
<a name="l00452"></a>00452 fe->num_overflow_samps * <span class="keyword">sizeof</span>(**inout_spch));
<a name="l00453"></a>00453 <span class="comment">/* Update the input pointer to cover this stuff. */</span>
<a name="l00454"></a>00454 *inout_spch += n_overflow;
<a name="l00455"></a>00455 *inout_nsamps -= n_overflow;
<a name="l00456"></a>00456 }
<a name="l00457"></a>00457 }
<a name="l00458"></a>00458 <span class="keywordflow">else</span> {
<a name="l00459"></a>00459 <span class="comment">/* There is still some relevant data left in the overflow buffer. */</span>
<a name="l00460"></a>00460 <span class="comment">/* Shift existing data to the beginning. */</span>
<a name="l00461"></a>00461 memmove(fe->overflow_samps,
<a name="l00462"></a>00462 fe->overflow_samps + orig_n_overflow - fe->num_overflow_samps,
<a name="l00463"></a>00463 fe->num_overflow_samps * <span class="keyword">sizeof</span>(*fe->overflow_samps));
<a name="l00464"></a>00464 <span class="comment">/* Copy in whatever we had in the original speech buffer. */</span>
<a name="l00465"></a>00465 n_overflow = *inout_spch - orig_spch + *inout_nsamps;
<a name="l00466"></a>00466 <span class="keywordflow">if</span> (n_overflow > fe->frame_size - fe->num_overflow_samps)
<a name="l00467"></a>00467 n_overflow = fe->frame_size - fe->num_overflow_samps;
<a name="l00468"></a>00468 memcpy(fe->overflow_samps + fe->num_overflow_samps,
<a name="l00469"></a>00469 orig_spch, n_overflow * <span class="keyword">sizeof</span>(*orig_spch));
<a name="l00470"></a>00470 fe->num_overflow_samps += n_overflow;
<a name="l00471"></a>00471 <span class="comment">/* Advance the input pointers. */</span>
<a name="l00472"></a>00472 <span class="keywordflow">if</span> (n_overflow > *inout_spch - orig_spch) {
<a name="l00473"></a>00473 n_overflow -= (*inout_spch - orig_spch);
<a name="l00474"></a>00474 *inout_spch += n_overflow;
<a name="l00475"></a>00475 *inout_nsamps -= n_overflow;
<a name="l00476"></a>00476 }
<a name="l00477"></a>00477 }
<a name="l00478"></a>00478
<a name="l00479"></a>00479 <span class="comment">/* Finally update the frame counter with the number of frames we procesed. */</span>
<a name="l00480"></a>00480 *inout_nframes = outidx; <span class="comment">/* FIXME: Not sure why I wrote it this way... */</span>
<a name="l00481"></a>00481 <span class="keywordflow">return</span> 0;
<a name="l00482"></a>00482 }
<a name="l00483"></a>00483
<a name="l00484"></a>00484 <span class="keywordtype">int</span>
<a name="l00485"></a>00485 fe_process_utt(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe, int16 <span class="keyword">const</span> * spch, <span class="keywordtype">size_t</span> nsamps,
<a name="l00486"></a>00486 mfcc_t *** cep_block, int32 * nframes)
<a name="l00487"></a>00487 {
<a name="l00488"></a>00488 mfcc_t **cep;
<a name="l00489"></a>00489 <span class="keywordtype">int</span> rv;
<a name="l00490"></a>00490
<a name="l00491"></a>00491 <span class="comment">/* Figure out how many frames we will need. */</span>
<a name="l00492"></a>00492 fe_process_frames(fe, NULL, &nsamps, NULL, nframes);
<a name="l00493"></a>00493 <span class="comment">/* Create the output buffer (it has to exist, even if there are no output frames). */</span>
<a name="l00494"></a>00494 <span class="keywordflow">if</span> (*nframes)
<a name="l00495"></a>00495 cep = (mfcc_t **)<a class="code" href="ckd__alloc_8h.html#a949e7b50fcd9697b1563fa57f50e9c4f" title="Macro for __ckd_calloc_2d__.">ckd_calloc_2d</a>(*nframes, fe->feature_dimension, <span class="keyword">sizeof</span>(**cep));
<a name="l00496"></a>00496 <span class="keywordflow">else</span>
<a name="l00497"></a>00497 cep = (mfcc_t **)<a class="code" href="ckd__alloc_8h.html#a949e7b50fcd9697b1563fa57f50e9c4f" title="Macro for __ckd_calloc_2d__.">ckd_calloc_2d</a>(1, fe->feature_dimension, <span class="keyword">sizeof</span>(**cep));
<a name="l00498"></a>00498 <span class="comment">/* Now just call fe_process_frames() with the allocated buffer. */</span>
<a name="l00499"></a>00499 rv = fe_process_frames(fe, &spch, &nsamps, cep, nframes);
<a name="l00500"></a>00500 *cep_block = cep;
<a name="l00501"></a>00501
<a name="l00502"></a>00502 <span class="keywordflow">return</span> rv;
<a name="l00503"></a>00503 }
<a name="l00504"></a>00504
<a name="l00505"></a>00505
<a name="l00506"></a>00506 int32
<a name="l00507"></a>00507 fe_end_utt(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe, mfcc_t * cepvector, int32 * nframes)
<a name="l00508"></a>00508 {
<a name="l00509"></a>00509 <span class="comment">/* Process any remaining data. */</span>
<a name="l00510"></a>00510 <span class="keywordflow">if</span> (fe->num_overflow_samps > 0) {
<a name="l00511"></a>00511 fe_read_frame(fe, fe->overflow_samps, fe->num_overflow_samps);
<a name="l00512"></a>00512 *nframes = fe_write_frame(fe, cepvector);
<a name="l00513"></a>00513 }
<a name="l00514"></a>00514 <span class="keywordflow">else</span> {
<a name="l00515"></a>00515 *nframes = 0;
<a name="l00516"></a>00516 }
<a name="l00517"></a>00517
<a name="l00518"></a>00518 <span class="comment">/* reset overflow buffers... */</span>
<a name="l00519"></a>00519 fe->num_overflow_samps = 0;
<a name="l00520"></a>00520 fe->start_flag = 0;
<a name="l00521"></a>00521
<a name="l00522"></a>00522 <span class="keywordflow">return</span> 0;
<a name="l00523"></a>00523 }
<a name="l00524"></a>00524
<a name="l00525"></a>00525 <a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *
<a name="l00526"></a>00526 fe_retain(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> *fe)
<a name="l00527"></a>00527 {
<a name="l00528"></a>00528 ++fe->refcount;
<a name="l00529"></a>00529 <span class="keywordflow">return</span> fe;
<a name="l00530"></a>00530 }
<a name="l00531"></a>00531
<a name="l00532"></a>00532 <span class="keywordtype">int</span>
<a name="l00533"></a>00533 fe_free(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe)
<a name="l00534"></a>00534 {
<a name="l00535"></a>00535 <span class="keywordflow">if</span> (fe == NULL)
<a name="l00536"></a>00536 <span class="keywordflow">return</span> 0;
<a name="l00537"></a>00537 <span class="keywordflow">if</span> (--fe->refcount > 0)
<a name="l00538"></a>00538 <span class="keywordflow">return</span> fe->refcount;
<a name="l00539"></a>00539
<a name="l00540"></a>00540 <span class="comment">/* kill FE instance - free everything... */</span>
<a name="l00541"></a>00541 <span class="keywordflow">if</span> (fe->mel_fb) {
<a name="l00542"></a>00542 <span class="keywordflow">if</span> (fe->mel_fb->mel_cosine)
<a name="l00543"></a>00543 fe_free_2d((<span class="keywordtype">void</span> *) fe->mel_fb->mel_cosine);
<a name="l00544"></a>00544 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->mel_fb->lifter);
<a name="l00545"></a>00545 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->mel_fb->spec_start);
<a name="l00546"></a>00546 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->mel_fb->filt_start);
<a name="l00547"></a>00547 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->mel_fb->filt_width);
<a name="l00548"></a>00548 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->mel_fb->filt_coeffs);
<a name="l00549"></a>00549 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->mel_fb);
<a name="l00550"></a>00550 }
<a name="l00551"></a>00551 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->spch);
<a name="l00552"></a>00552 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->frame);
<a name="l00553"></a>00553 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->ccc);
<a name="l00554"></a>00554 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->sss);
<a name="l00555"></a>00555 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->spec);
<a name="l00556"></a>00556 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->mfspec);
<a name="l00557"></a>00557 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->overflow_samps);
<a name="l00558"></a>00558 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe->hamming_window);
<a name="l00559"></a>00559 <a class="code" href="cmd__ln_8h.html#a26707fc85e87d8999e368a680e7873cd" title="Release a command-line argument set and all associated strings.">cmd_ln_free_r</a>(fe->config);
<a name="l00560"></a>00560 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(fe);
<a name="l00561"></a>00561
<a name="l00562"></a>00562 <span class="keywordflow">return</span> 0;
<a name="l00563"></a>00563 }
<a name="l00564"></a>00564
<a name="l00568"></a>00568 int32
<a name="l00569"></a>00569 fe_mfcc_to_float(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe,
<a name="l00570"></a>00570 mfcc_t ** input, float32 ** output, int32 nframes)
<a name="l00571"></a>00571 {
<a name="l00572"></a>00572 int32 i;
<a name="l00573"></a>00573
<a name="l00574"></a>00574 <span class="preprocessor">#ifndef FIXED_POINT</span>
<a name="l00575"></a>00575 <span class="preprocessor"></span> <span class="keywordflow">if</span> ((<span class="keywordtype">void</span> *) input == (<span class="keywordtype">void</span> *) output)
<a name="l00576"></a>00576 <span class="keywordflow">return</span> nframes * fe->feature_dimension;
<a name="l00577"></a>00577 <span class="preprocessor">#endif</span>
<a name="l00578"></a>00578 <span class="preprocessor"></span> <span class="keywordflow">for</span> (i = 0; i < nframes * fe->feature_dimension; ++i)
<a name="l00579"></a>00579 output[0][i] = MFCC2FLOAT(input[0][i]);
<a name="l00580"></a>00580
<a name="l00581"></a>00581 <span class="keywordflow">return</span> i;
<a name="l00582"></a>00582 }
<a name="l00583"></a>00583
<a name="l00587"></a>00587 int32
<a name="l00588"></a>00588 fe_float_to_mfcc(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe,
<a name="l00589"></a>00589 float32 ** input, mfcc_t ** output, int32 nframes)
<a name="l00590"></a>00590 {
<a name="l00591"></a>00591 int32 i;
<a name="l00592"></a>00592
<a name="l00593"></a>00593 <span class="preprocessor">#ifndef FIXED_POINT</span>
<a name="l00594"></a>00594 <span class="preprocessor"></span> <span class="keywordflow">if</span> ((<span class="keywordtype">void</span> *) input == (<span class="keywordtype">void</span> *) output)
<a name="l00595"></a>00595 <span class="keywordflow">return</span> nframes * fe->feature_dimension;
<a name="l00596"></a>00596 <span class="preprocessor">#endif</span>
<a name="l00597"></a>00597 <span class="preprocessor"></span> <span class="keywordflow">for</span> (i = 0; i < nframes * fe->feature_dimension; ++i)
<a name="l00598"></a>00598 output[0][i] = FLOAT2MFCC(input[0][i]);
<a name="l00599"></a>00599
<a name="l00600"></a>00600 <span class="keywordflow">return</span> i;
<a name="l00601"></a>00601 }
<a name="l00602"></a>00602
<a name="l00603"></a>00603 int32
<a name="l00604"></a>00604 fe_logspec_to_mfcc(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe, <span class="keyword">const</span> mfcc_t * fr_spec, mfcc_t * fr_cep)
<a name="l00605"></a>00605 {
<a name="l00606"></a>00606 <span class="preprocessor">#ifdef FIXED_POINT</span>
<a name="l00607"></a>00607 <span class="preprocessor"></span> fe_spec2cep(fe, fr_spec, fr_cep);
<a name="l00608"></a>00608 <span class="preprocessor">#else </span><span class="comment">/* ! FIXED_POINT */</span>
<a name="l00609"></a>00609 powspec_t *powspec;
<a name="l00610"></a>00610 int32 i;
<a name="l00611"></a>00611
<a name="l00612"></a>00612 powspec = <a class="code" href="ckd__alloc_8h.html#a8e89a31c3c70710a8e023a177084bff2" title="Macro for __ckd_malloc__.">ckd_malloc</a>(fe->mel_fb->num_filters * <span class="keyword">sizeof</span>(powspec_t));
<a name="l00613"></a>00613 <span class="keywordflow">for</span> (i = 0; i < fe->mel_fb->num_filters; ++i)
<a name="l00614"></a>00614 powspec[i] = (powspec_t) fr_spec[i];
<a name="l00615"></a>00615 fe_spec2cep(fe, powspec, fr_cep);
<a name="l00616"></a>00616 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(powspec);
<a name="l00617"></a>00617 <span class="preprocessor">#endif </span><span class="comment">/* ! FIXED_POINT */</span>
<a name="l00618"></a>00618 <span class="keywordflow">return</span> 0;
<a name="l00619"></a>00619 }
<a name="l00620"></a>00620
<a name="l00621"></a>00621 int32
<a name="l00622"></a>00622 fe_logspec_dct2(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe, <span class="keyword">const</span> mfcc_t * fr_spec, mfcc_t * fr_cep)
<a name="l00623"></a>00623 {
<a name="l00624"></a>00624 <span class="preprocessor">#ifdef FIXED_POINT</span>
<a name="l00625"></a>00625 <span class="preprocessor"></span> fe_dct2(fe, fr_spec, fr_cep, 0);
<a name="l00626"></a>00626 <span class="preprocessor">#else </span><span class="comment">/* ! FIXED_POINT */</span>
<a name="l00627"></a>00627 powspec_t *powspec;
<a name="l00628"></a>00628 int32 i;
<a name="l00629"></a>00629
<a name="l00630"></a>00630 powspec = <a class="code" href="ckd__alloc_8h.html#a8e89a31c3c70710a8e023a177084bff2" title="Macro for __ckd_malloc__.">ckd_malloc</a>(fe->mel_fb->num_filters * <span class="keyword">sizeof</span>(powspec_t));
<a name="l00631"></a>00631 <span class="keywordflow">for</span> (i = 0; i < fe->mel_fb->num_filters; ++i)
<a name="l00632"></a>00632 powspec[i] = (powspec_t) fr_spec[i];
<a name="l00633"></a>00633 fe_dct2(fe, powspec, fr_cep, 0);
<a name="l00634"></a>00634 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(powspec);
<a name="l00635"></a>00635 <span class="preprocessor">#endif </span><span class="comment">/* ! FIXED_POINT */</span>
<a name="l00636"></a>00636 <span class="keywordflow">return</span> 0;
<a name="l00637"></a>00637 }
<a name="l00638"></a>00638
<a name="l00639"></a>00639 int32
<a name="l00640"></a>00640 fe_mfcc_dct3(<a class="code" href="structfe__s.html" title="Structure for the front-end computation.">fe_t</a> * fe, <span class="keyword">const</span> mfcc_t * fr_cep, mfcc_t * fr_spec)
<a name="l00641"></a>00641 {
<a name="l00642"></a>00642 <span class="preprocessor">#ifdef FIXED_POINT</span>
<a name="l00643"></a>00643 <span class="preprocessor"></span> fe_dct3(fe, fr_cep, fr_spec);
<a name="l00644"></a>00644 <span class="preprocessor">#else </span><span class="comment">/* ! FIXED_POINT */</span>
<a name="l00645"></a>00645 powspec_t *powspec;
<a name="l00646"></a>00646 int32 i;
<a name="l00647"></a>00647
<a name="l00648"></a>00648 powspec = <a class="code" href="ckd__alloc_8h.html#a8e89a31c3c70710a8e023a177084bff2" title="Macro for __ckd_malloc__.">ckd_malloc</a>(fe->mel_fb->num_filters * <span class="keyword">sizeof</span>(powspec_t));
<a name="l00649"></a>00649 fe_dct3(fe, fr_cep, powspec);
<a name="l00650"></a>00650 <span class="keywordflow">for</span> (i = 0; i < fe->mel_fb->num_filters; ++i)
<a name="l00651"></a>00651 fr_spec[i] = (mfcc_t) powspec[i];
<a name="l00652"></a>00652 <a class="code" href="ckd__alloc_8h.html#a31c6b405558620ac37599737b5722fbf" title="Test and free a 1-D array.">ckd_free</a>(powspec);
<a name="l00653"></a>00653 <span class="preprocessor">#endif </span><span class="comment">/* ! FIXED_POINT */</span>
<a name="l00654"></a>00654 <span class="keywordflow">return</span> 0;
<a name="l00655"></a>00655 }
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