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<h1>include/sphinxbase/ad.h</h1> </div>
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<div class="contents">
<a href="ad_8h.html">Go to the documentation of this file.</a><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) 1999-2004 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="comment">/*</span>
<a name="l00038"></a>00038 <span class="comment"> * ad.h -- generic live audio interface for recording and playback</span>
<a name="l00039"></a>00039 <span class="comment"> * </span>
<a name="l00040"></a>00040 <span class="comment"> * **********************************************</span>
<a name="l00041"></a>00041 <span class="comment"> * CMU ARPA Speech Project</span>
<a name="l00042"></a>00042 <span class="comment"> *</span>
<a name="l00043"></a>00043 <span class="comment"> * Copyright (c) 1996 Carnegie Mellon University.</span>
<a name="l00044"></a>00044 <span class="comment"> * ALL RIGHTS RESERVED.</span>
<a name="l00045"></a>00045 <span class="comment"> * **********************************************</span>
<a name="l00046"></a>00046 <span class="comment"> * </span>
<a name="l00047"></a>00047 <span class="comment"> * HISTORY</span>
<a name="l00048"></a>00048 <span class="comment"> * </span>
<a name="l00049"></a>00049 <span class="comment"> * $Log: ad.h,v $</span>
<a name="l00050"></a>00050 <span class="comment"> * Revision 1.8 2005/06/22 08:00:06 arthchan2003</span>
<a name="l00051"></a>00051 <span class="comment"> * Completed all doxygen documentation on file description for libs3decoder/libutil/libs3audio and programs.</span>
<a name="l00052"></a>00052 <span class="comment"> *</span>
<a name="l00053"></a>00053 <span class="comment"> * Revision 1.7 2004/12/14 00:39:49 arthchan2003</span>
<a name="l00054"></a>00054 <span class="comment"> * add <s3types.h> to the code, change some comments to doxygen style</span>
<a name="l00055"></a>00055 <span class="comment"> *</span>
<a name="l00056"></a>00056 <span class="comment"> * Revision 1.6 2004/12/06 11:17:55 arthchan2003</span>
<a name="l00057"></a>00057 <span class="comment"> * Update the copyright information of ad.h, *sigh* start to feel tired of updating documentation system. Anyone who has time, please take up libs3audio. That is the last place which is undocumented</span>
<a name="l00058"></a>00058 <span class="comment"> *</span>
<a name="l00059"></a>00059 <span class="comment"> * Revision 1.5 2004/07/23 23:44:46 egouvea</span>
<a name="l00060"></a>00060 <span class="comment"> * Changed the cygwin code to use the same audio files as the MS Visual code, removed unused variables from fe_interface.c</span>
<a name="l00061"></a>00061 <span class="comment"> *</span>
<a name="l00062"></a>00062 <span class="comment"> * Revision 1.4 2004/02/29 23:48:31 egouvea</span>
<a name="l00063"></a>00063 <span class="comment"> * Updated configure.in to the recent automake/autoconf, fixed win32</span>
<a name="l00064"></a>00064 <span class="comment"> * references in audio files.</span>
<a name="l00065"></a>00065 <span class="comment"> *</span>
<a name="l00066"></a>00066 <span class="comment"> * Revision 1.3 2002/11/10 19:27:38 egouvea</span>
<a name="l00067"></a>00067 <span class="comment"> * Fixed references to sun's implementation of audio interface,</span>
<a name="l00068"></a>00068 <span class="comment"> * referring to the correct .h file, and replacing sun4 with sunos.</span>
<a name="l00069"></a>00069 <span class="comment"> *</span>
<a name="l00070"></a>00070 <span class="comment"> * Revision 1.2 2001/12/11 04:40:55 lenzo</span>
<a name="l00071"></a>00071 <span class="comment"> * License cleanup.</span>
<a name="l00072"></a>00072 <span class="comment"> *</span>
<a name="l00073"></a>00073 <span class="comment"> * Revision 1.1.1.1 2001/12/03 16:01:45 egouvea</span>
<a name="l00074"></a>00074 <span class="comment"> * Initial import of sphinx3</span>
<a name="l00075"></a>00075 <span class="comment"> *</span>
<a name="l00076"></a>00076 <span class="comment"> * Revision 1.1.1.1 2001/01/17 05:17:14 ricky</span>
<a name="l00077"></a>00077 <span class="comment"> * Initial Import of the s3.3 decoder, has working decodeaudiofile, s3.3_live</span>
<a name="l00078"></a>00078 <span class="comment"> *</span>
<a name="l00079"></a>00079 <span class="comment"> * </span>
<a name="l00080"></a>00080 <span class="comment"> * 19-Jan-1999 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00081"></a>00081 <span class="comment"> * Added AD_ return codes. Added ad_open_sps_bufsize(), and</span>
<a name="l00082"></a>00082 <span class="comment"> * ad_rec_t.n_buf.</span>
<a name="l00083"></a>00083 <span class="comment"> * </span>
<a name="l00084"></a>00084 <span class="comment"> * 17-Apr-98 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00085"></a>00085 <span class="comment"> * Added ad_open_play_sps().</span>
<a name="l00086"></a>00086 <span class="comment"> * </span>
<a name="l00087"></a>00087 <span class="comment"> * 07-Mar-98 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00088"></a>00088 <span class="comment"> * Added ad_open_sps().</span>
<a name="l00089"></a>00089 <span class="comment"> * </span>
<a name="l00090"></a>00090 <span class="comment"> * 10-Jun-96 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00091"></a>00091 <span class="comment"> * Added ad_wbuf_t, ad_rec_t, and ad_play_t types, and augmented all</span>
<a name="l00092"></a>00092 <span class="comment"> * recording functions with ad_rec_t, and playback functions with</span>
<a name="l00093"></a>00093 <span class="comment"> * ad_play_t.</span>
<a name="l00094"></a>00094 <span class="comment"> * </span>
<a name="l00095"></a>00095 <span class="comment"> * 06-Jun-96 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00096"></a>00096 <span class="comment"> * Created.</span>
<a name="l00097"></a>00097 <span class="comment"> */</span>
<a name="l00098"></a>00098
<a name="l00103"></a>00103 <span class="preprocessor">#ifndef _AD_H_</span>
<a name="l00104"></a>00104 <span class="preprocessor"></span><span class="preprocessor">#define _AD_H_</span>
<a name="l00105"></a>00105 <span class="preprocessor"></span>
<a name="l00106"></a>00106 <span class="preprocessor">#include <sphinx_config.h></span>
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="preprocessor">#if defined (__CYGWIN__)</span>
<a name="l00109"></a>00109 <span class="preprocessor"></span><span class="preprocessor">#include <w32api/windows.h></span>
<a name="l00110"></a>00110 <span class="preprocessor">#include <w32api/mmsystem.h></span>
<a name="l00111"></a>00111 <span class="preprocessor">#elif (defined(WIN32) && !defined(GNUWINCE)) || defined(_WIN32_WCE)</span>
<a name="l00112"></a>00112 <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span>
<a name="l00113"></a>00113 <span class="preprocessor">#include <mmsystem.h></span>
<a name="l00114"></a>00114 <span class="preprocessor">#elif defined(AD_BACKEND_ALSA)</span>
<a name="l00115"></a>00115 <span class="preprocessor"></span><span class="preprocessor">#include <alsa/asoundlib.h></span>
<a name="l00116"></a>00116 <span class="preprocessor">#endif</span>
<a name="l00117"></a>00117 <span class="preprocessor"></span>
<a name="l00118"></a>00118 <span class="comment">/* Win32/WinCE DLL gunk */</span>
<a name="l00119"></a>00119 <span class="preprocessor">#include <sphinxbase/sphinxbase_export.h></span>
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="preprocessor">#include <sphinxbase/prim_type.h></span>
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00124"></a>00124 <span class="preprocessor"></span><span class="keyword">extern</span> <span class="stringliteral">"C"</span> {
<a name="l00125"></a>00125 <span class="preprocessor">#endif</span>
<a name="l00126"></a>00126 <span class="preprocessor"></span><span class="preprocessor">#if 0</span>
<a name="l00127"></a>00127 <span class="preprocessor"></span><span class="comment">/* Fool Emacs. */</span>
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 <span class="preprocessor">#endif</span>
<a name="l00130"></a>00130 <span class="preprocessor"></span>
<a name="l00131"></a>00131 <span class="preprocessor">#define AD_SAMPLE_SIZE (sizeof(int16))</span>
<a name="l00132"></a>00132 <span class="preprocessor"></span><span class="preprocessor">#define DEFAULT_SAMPLES_PER_SEC 16000</span>
<a name="l00133"></a>00133 <span class="preprocessor"></span>
<a name="l00134"></a>00134 <span class="comment">/* Return codes */</span>
<a name="l00135"></a>00135 <span class="preprocessor">#define AD_OK 0</span>
<a name="l00136"></a>00136 <span class="preprocessor"></span><span class="preprocessor">#define AD_EOF -1</span>
<a name="l00137"></a>00137 <span class="preprocessor"></span><span class="preprocessor">#define AD_ERR_GEN -1</span>
<a name="l00138"></a>00138 <span class="preprocessor"></span><span class="preprocessor">#define AD_ERR_NOT_OPEN -2</span>
<a name="l00139"></a>00139 <span class="preprocessor"></span><span class="preprocessor">#define AD_ERR_WAVE -3</span>
<a name="l00140"></a>00140 <span class="preprocessor"></span>
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="preprocessor">#if (defined(WIN32) || defined(AD_BACKEND_WIN32)) && !defined(GNUWINCE)</span>
<a name="l00143"></a>00143 <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00144"></a>00144 HGLOBAL h_whdr;
<a name="l00145"></a>00145 LPWAVEHDR p_whdr;
<a name="l00146"></a>00146 HGLOBAL h_buf;
<a name="l00147"></a>00147 LPSTR p_buf;
<a name="l00148"></a>00148 } ad_wbuf_t;
<a name="l00149"></a>00149 <span class="preprocessor">#endif</span>
<a name="l00150"></a>00150 <span class="preprocessor"></span>
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="comment">/* ------------ RECORDING -------------- */</span>
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="comment">/*</span>
<a name="l00155"></a>00155 <span class="comment"> * NOTE: ad_rec_t and ad_play_t are READ-ONLY structures for the user.</span>
<a name="l00156"></a>00156 <span class="comment"> */</span>
<a name="l00157"></a>00157
<a name="l00158"></a>00158 <span class="preprocessor">#if (defined(WIN32) || defined(AD_BACKEND_WIN32)) && !defined(GNUWINCE)</span>
<a name="l00159"></a>00159 <span class="preprocessor"></span>
<a name="l00160"></a>00160 <span class="preprocessor">#define DEFAULT_DEVICE (char*)DEV_MAPPER</span>
<a name="l00161"></a>00161 <span class="preprocessor"></span>
<a name="l00165"></a>00165 <span class="keyword">typedef</span> <span class="keyword">struct </span>ad_rec_s {
<a name="l00166"></a>00166 HWAVEIN h_wavein; <span class="comment">/* "HANDLE" to the audio input device */</span>
<a name="l00167"></a>00167 ad_wbuf_t *wi_buf; <span class="comment">/* Recording buffers provided to system */</span>
<a name="l00168"></a>00168 int32 n_buf; <span class="comment">/* #Recording buffers provided to system */</span>
<a name="l00169"></a>00169 int32 opened; <span class="comment">/* Flag; A/D opened for recording */</span>
<a name="l00170"></a>00170 int32 recording;
<a name="l00171"></a>00171 int32 curbuf; <span class="comment">/* Current buffer with data for application */</span>
<a name="l00172"></a>00172 int32 curoff; <span class="comment">/* Start of data for application in curbuf */</span>
<a name="l00173"></a>00173 int32 curlen; <span class="comment">/* #samples of data from curoff in curbuf */</span>
<a name="l00174"></a>00174 int32 lastbuf; <span class="comment">/* Last buffer containing data after recording stopped */</span>
<a name="l00175"></a>00175 int32 sps; <span class="comment">/* Samples/sec */</span>
<a name="l00176"></a>00176 int32 bps; <span class="comment">/* Bytes/sample */</span>
<a name="l00177"></a>00177 } <a class="code" href="structad__rec__t.html">ad_rec_t</a>;
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="preprocessor">#elif defined(AD_BACKEND_OSS)</span>
<a name="l00180"></a>00180 <span class="preprocessor"></span>
<a name="l00181"></a>00181 <span class="preprocessor">#define DEFAULT_DEVICE "/dev/dsp"</span>
<a name="l00182"></a>00182 <span class="preprocessor"></span>
<a name="l00187"></a>00187 <span class="comment">/* Added by jd5q+@andrew.cmu.edu, 10/3/1997: */</span>
<a name="l00188"></a>00188 <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00189"></a>00189 int32 dspFD; <span class="comment">/* Audio device descriptor */</span>
<a name="l00190"></a>00190 int32 recording;
<a name="l00191"></a>00191 int32 sps; <span class="comment">/* Samples/sec */</span>
<a name="l00192"></a>00192 int32 bps; <span class="comment">/* Bytes/sample */</span>
<a name="l00193"></a>00193 } <a class="code" href="structad__rec__t.html">ad_rec_t</a>;
<a name="l00194"></a>00194
<a name="l00195"></a>00195 <span class="preprocessor">#elif defined(AD_BACKEND_ESD)</span>
<a name="l00196"></a>00196 <span class="preprocessor"></span>
<a name="l00197"></a>00197 <span class="preprocessor">#define DEFAULT_DEVICE NULL</span>
<a name="l00198"></a>00198 <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00199"></a>00199 int32 fd;
<a name="l00200"></a>00200 int32 recording;
<a name="l00201"></a>00201 int32 sps;
<a name="l00202"></a>00202 int32 bps;
<a name="l00203"></a>00203 } <a class="code" href="structad__rec__t.html">ad_rec_t</a>;
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <span class="preprocessor">#elif defined(AD_BACKEND_ALSA)</span>
<a name="l00206"></a>00206 <span class="preprocessor"></span>
<a name="l00207"></a>00207 <span class="preprocessor">#define DEFAULT_DEVICE "default"</span>
<a name="l00208"></a>00208 <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00209"></a>00209 snd_pcm_t *dspH;
<a name="l00210"></a>00210 int32 recording;
<a name="l00211"></a>00211 int32 sps;
<a name="l00212"></a>00212 int32 bps;
<a name="l00213"></a>00213 } <a class="code" href="structad__rec__t.html">ad_rec_t</a>;
<a name="l00214"></a>00214
<a name="l00215"></a>00215 <span class="preprocessor">#elif defined(AD_BACKEND_S60)</span>
<a name="l00216"></a>00216 <span class="preprocessor"></span>
<a name="l00217"></a>00217 <span class="keyword">typedef</span> <span class="keyword">struct </span>ad_rec_s {
<a name="l00218"></a>00218 <span class="keywordtype">void</span>* recorder;
<a name="l00219"></a>00219 int32 recording;
<a name="l00220"></a>00220 int32 sps;
<a name="l00221"></a>00221 int32 bps;
<a name="l00222"></a>00222 } <a class="code" href="structad__rec__t.html">ad_rec_t</a>;
<a name="l00223"></a>00223
<a name="l00224"></a>00224 SPHINXBASE_EXPORT
<a name="l00225"></a>00225 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *ad_open_sps_bufsize (int32 samples_per_sec, int32 bufsize_msec);
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <span class="preprocessor">#else</span>
<a name="l00228"></a>00228 <span class="preprocessor"></span>
<a name="l00229"></a>00229 <span class="preprocessor">#define DEFAULT_DEVICE NULL</span>
<a name="l00230"></a><a class="code" href="structad__rec__t.html">00230</a> <span class="preprocessor"></span><span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00231"></a><a class="code" href="structad__rec__t.html#ac8ccccdc755f68cb4ad24007b36d6c8a">00231</a> int32 <a class="code" href="structad__rec__t.html#ac8ccccdc755f68cb4ad24007b36d6c8a" title="Samples/sec.">sps</a>;
<a name="l00232"></a><a class="code" href="structad__rec__t.html#ade5a608978908d87deea7fa9827f8510">00232</a> int32 <a class="code" href="structad__rec__t.html#ade5a608978908d87deea7fa9827f8510" title="Bytes/sample.">bps</a>;
<a name="l00233"></a>00233 } <a class="code" href="structad__rec__t.html">ad_rec_t</a>;
<a name="l00234"></a>00234
<a name="l00235"></a>00235
<a name="l00236"></a>00236 <span class="preprocessor">#endif</span>
<a name="l00237"></a>00237 <span class="preprocessor"></span>
<a name="l00238"></a>00238
<a name="l00248"></a>00248 SPHINXBASE_EXPORT
<a name="l00249"></a>00249 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *<a class="code" href="ad_8h.html#a43f66257a2457d6c711dc5c694bfc02f" title="Open a specific audio device for recording.">ad_open_dev</a> (
<a name="l00250"></a>00250 <span class="keyword">const</span> <span class="keywordtype">char</span> *dev,
<a name="l00251"></a>00251 int32 samples_per_sec
<a name="l00252"></a>00252 );
<a name="l00253"></a>00253
<a name="l00257"></a>00257 SPHINXBASE_EXPORT
<a name="l00258"></a>00258 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *<a class="code" href="ad_8h.html#a71b4eec805fbe5c398ea0897816de6f0" title="Open the default audio device with a given sampling rate.">ad_open_sps</a> (
<a name="l00259"></a>00259 int32 samples_per_sec
<a name="l00260"></a>00260 );
<a name="l00261"></a>00261
<a name="l00262"></a>00262
<a name="l00266"></a>00266 SPHINXBASE_EXPORT
<a name="l00267"></a>00267 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *<a class="code" href="ad_8h.html#a3def0da951e840fb4c72ef9259540686" title="Open the default audio device.">ad_open</a> ( <span class="keywordtype">void</span> );
<a name="l00268"></a>00268
<a name="l00269"></a>00269
<a name="l00270"></a>00270 <span class="preprocessor">#if defined(WIN32) && !defined(GNUWINCE)</span>
<a name="l00271"></a>00271 <span class="preprocessor"></span><span class="comment">/*</span>
<a name="l00272"></a>00272 <span class="comment"> * Like ad_open_sps but specifies buffering required within driver. This function is</span>
<a name="l00273"></a>00273 <span class="comment"> * useful if the default (5000 msec worth) is too small and results in loss of data.</span>
<a name="l00274"></a>00274 <span class="comment"> */</span>
<a name="l00275"></a>00275 SPHINXBASE_EXPORT
<a name="l00276"></a>00276 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *ad_open_sps_bufsize (int32 samples_per_sec, int32 bufsize_msec);
<a name="l00277"></a>00277 <span class="preprocessor">#endif</span>
<a name="l00278"></a>00278 <span class="preprocessor"></span>
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <span class="comment">/* Start audio recording. Return value: 0 if successful, <0 otherwise */</span>
<a name="l00281"></a>00281 SPHINXBASE_EXPORT
<a name="l00282"></a>00282 int32 ad_start_rec (<a class="code" href="structad__rec__t.html">ad_rec_t</a> *);
<a name="l00283"></a>00283
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="comment">/* Stop audio recording. Return value: 0 if successful, <0 otherwise */</span>
<a name="l00286"></a>00286 SPHINXBASE_EXPORT
<a name="l00287"></a>00287 int32 ad_stop_rec (<a class="code" href="structad__rec__t.html">ad_rec_t</a> *);
<a name="l00288"></a>00288
<a name="l00289"></a>00289
<a name="l00290"></a>00290 <span class="comment">/* Close the recording device. Return value: 0 if successful, <0 otherwise */</span>
<a name="l00291"></a>00291 SPHINXBASE_EXPORT
<a name="l00292"></a>00292 int32 ad_close (<a class="code" href="structad__rec__t.html">ad_rec_t</a> *);
<a name="l00293"></a>00293
<a name="l00294"></a>00294
<a name="l00295"></a>00295 <span class="comment">/*</span>
<a name="l00296"></a>00296 <span class="comment"> * Read next block of audio samples while recording; read upto max samples into buf.</span>
<a name="l00297"></a>00297 <span class="comment"> * Return value: # samples actually read (could be 0 since non-blocking); -1 if not</span>
<a name="l00298"></a>00298 <span class="comment"> * recording and no more samples remaining to be read from most recent recording.</span>
<a name="l00299"></a>00299 <span class="comment"> */</span>
<a name="l00300"></a>00300 SPHINXBASE_EXPORT
<a name="l00301"></a>00301 int32 ad_read (<a class="code" href="structad__rec__t.html">ad_rec_t</a> *, int16 *buf, int32 max);
<a name="l00302"></a>00302
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <span class="comment">/* ------ PLAYBACK; SIMILAR TO RECORDING ------- */</span>
<a name="l00305"></a>00305
<a name="l00306"></a>00306 <span class="preprocessor">#if defined(WIN32) && !defined(GNUWINCE)</span>
<a name="l00307"></a>00307 <span class="preprocessor"></span>
<a name="l00308"></a>00308 <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00309"></a>00309 HWAVEOUT h_waveout; <span class="comment">/* "HANDLE" to the audio output device */</span>
<a name="l00310"></a>00310 ad_wbuf_t *wo_buf; <span class="comment">/* Playback buffers given to the system */</span>
<a name="l00311"></a>00311 int32 opened; <span class="comment">/* Flag; A/D opened for playback */</span>
<a name="l00312"></a>00312 int32 playing;
<a name="l00313"></a>00313 <span class="keywordtype">char</span> *busy; <span class="comment">/* flags [N_WO_BUF] indicating whether given to system */</span>
<a name="l00314"></a>00314 int32 nxtbuf; <span class="comment">/* Next buffer [0..N_WO_BUF-1] to be used for playback data */</span>
<a name="l00315"></a>00315 int32 sps; <span class="comment">/* Samples/sec */</span>
<a name="l00316"></a>00316 int32 bps; <span class="comment">/* Bytes/sample */</span>
<a name="l00317"></a>00317 } <a class="code" href="structad__play__t.html">ad_play_t</a>;
<a name="l00318"></a>00318
<a name="l00319"></a>00319 <span class="preprocessor">#else</span>
<a name="l00320"></a>00320 <span class="preprocessor"></span>
<a name="l00321"></a><a class="code" href="structad__play__t.html">00321</a> <span class="keyword">typedef</span> <span class="keyword">struct </span>{
<a name="l00322"></a>00322 int32 sps; <span class="comment">/* Samples/sec */</span>
<a name="l00323"></a>00323 int32 bps; <span class="comment">/* Bytes/sample */</span>
<a name="l00324"></a>00324 } <a class="code" href="structad__play__t.html">ad_play_t</a>; <span class="comment">/* Dummy definition for systems without A/D stuff */</span>
<a name="l00325"></a>00325
<a name="l00326"></a>00326 <span class="preprocessor">#endif</span>
<a name="l00327"></a>00327 <span class="preprocessor"></span>
<a name="l00328"></a>00328
<a name="l00329"></a>00329 SPHINXBASE_EXPORT
<a name="l00330"></a>00330 <a class="code" href="structad__play__t.html">ad_play_t</a> *ad_open_play_sps (int32 samples_per_sec);
<a name="l00331"></a>00331
<a name="l00332"></a>00332 SPHINXBASE_EXPORT
<a name="l00333"></a>00333 <a class="code" href="structad__play__t.html">ad_play_t</a> *ad_open_play ( <span class="keywordtype">void</span> );
<a name="l00334"></a>00334
<a name="l00335"></a>00335 SPHINXBASE_EXPORT
<a name="l00336"></a>00336 int32 ad_start_play (<a class="code" href="structad__play__t.html">ad_play_t</a> *);
<a name="l00337"></a>00337
<a name="l00338"></a>00338 SPHINXBASE_EXPORT
<a name="l00339"></a>00339 int32 ad_stop_play (<a class="code" href="structad__play__t.html">ad_play_t</a> *);
<a name="l00340"></a>00340
<a name="l00341"></a>00341 SPHINXBASE_EXPORT
<a name="l00342"></a>00342 int32 ad_close_play (<a class="code" href="structad__play__t.html">ad_play_t</a> *);
<a name="l00343"></a>00343
<a name="l00344"></a>00344
<a name="l00353"></a>00353 SPHINXBASE_EXPORT
<a name="l00354"></a>00354 int32 <a class="code" href="ad_8h.html#aea278a0c26051f4fe011778f225ea9c4" title="Queue a block of audio samples for playback.">ad_write</a> (<a class="code" href="structad__play__t.html">ad_play_t</a> *, int16 *buf, int32 len);
<a name="l00355"></a>00355
<a name="l00356"></a>00356
<a name="l00357"></a>00357 <span class="comment">/* ------ MISCELLANEOUS ------- */</span>
<a name="l00358"></a>00358
<a name="l00362"></a>00362 SPHINXBASE_EXPORT
<a name="l00363"></a>00363 <span class="keywordtype">void</span> <a class="code" href="ad_8h.html#a7eab4d2f35d221c569b85d4240b83600" title="Convert mu-law data to int16 linear PCM format.">ad_mu2li</a> (int16 *outbuf, <span class="comment">/* Out: PCM data placed here (allocated by user) */</span>
<a name="l00364"></a>00364 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *inbuf, <span class="comment">/* In: Input buffer with mulaw data */</span>
<a name="l00365"></a>00365 int32 n_samp); <span class="comment">/* In: #Samples in inbuf */</span>
<a name="l00366"></a>00366
<a name="l00367"></a>00367 <span class="preprocessor">#ifdef __cplusplus</span>
<a name="l00368"></a>00368 <span class="preprocessor"></span>}
<a name="l00369"></a>00369 <span class="preprocessor">#endif</span>
<a name="l00370"></a>00370 <span class="preprocessor"></span>
<a name="l00371"></a>00371
<a name="l00372"></a>00372 <span class="preprocessor">#endif</span>
</pre></div></div>
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