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<h1>src/libsphinxad/rec_win32.c</h1> </div>
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<div class="contents">
<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) 1999-2001 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
<a name="l00038"></a>00038 <span class="comment">/*</span>
<a name="l00039"></a>00039 <span class="comment"> * rec.c -- low level audio recording for Windows NT/95.</span>
<a name="l00040"></a>00040 <span class="comment"> *</span>
<a name="l00041"></a>00041 <span class="comment"> * HISTORY</span>
<a name="l00042"></a>00042 <span class="comment"> * </span>
<a name="l00043"></a>00043 <span class="comment"> * 19-Jan-1999 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00044"></a>00044 <span class="comment"> * Added AD_ return codes. Added ad_open_sps_bufsize(), and</span>
<a name="l00045"></a>00045 <span class="comment"> * ad_rec_t.n_buf.</span>
<a name="l00046"></a>00046 <span class="comment"> * </span>
<a name="l00047"></a>00047 <span class="comment"> * 07-Mar-98 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00048"></a>00048 <span class="comment"> * Added ad_open_sps(), and made ad_open() call it.</span>
<a name="l00049"></a>00049 <span class="comment"> * </span>
<a name="l00050"></a>00050 <span class="comment"> * 10-Jun-96 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00051"></a>00051 <span class="comment"> * Added ad_rec_t type to all calls.</span>
<a name="l00052"></a>00052 <span class="comment"> * </span>
<a name="l00053"></a>00053 <span class="comment"> * 03-Jun-96 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00054"></a>00054 <span class="comment"> * Created.</span>
<a name="l00055"></a>00055 <span class="comment"> */</span>
<a name="l00056"></a>00056
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="preprocessor">#include <windows.h></span>
<a name="l00059"></a>00059 <span class="preprocessor">#include <mmsystem.h></span>
<a name="l00060"></a>00060 <span class="preprocessor">#include <stdio.h></span>
<a name="l00061"></a>00061 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00062"></a>00062 <span class="preprocessor">#include <string.h></span>
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="preprocessor">#include "sphinxbase/prim_type.h"</span>
<a name="l00065"></a>00065 <span class="preprocessor">#include "sphinxbase/ad.h"</span>
<a name="l00066"></a>00066
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="preprocessor">#define DEFAULT_N_WI_BUF 32 </span><span class="comment">/* #Recording bufs */</span>
<a name="l00069"></a>00069 <span class="preprocessor">#define WI_BUFSIZE 2500 </span><span class="comment">/* Samples/buf (Why this specific value??</span>
<a name="l00070"></a>00070 <span class="comment"> So that at reasonable sampling rates</span>
<a name="l00071"></a>00071 <span class="comment"> data is returned frequently enough.) */</span>
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">/* Silvio Moioli: using OutputDebugStringW instead of OutputDebugString */</span>
<a name="l00074"></a>00074 <span class="preprocessor">#ifdef _WIN32_WCE</span>
<a name="l00075"></a>00075 <span class="preprocessor"></span><span class="preprocessor">#include "ckd_alloc.h"</span>
<a name="l00076"></a>00076 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00077"></a>00077 wavein_error(<span class="keywordtype">char</span> *src, int32 ret)
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 TCHAR errbuf[512];
<a name="l00080"></a>00080 <span class="keywordtype">wchar_t</span>* werrbuf;
<a name="l00081"></a>00081 <span class="keywordtype">size_t</span> len;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 waveOutGetErrorText(ret, errbuf, <span class="keyword">sizeof</span>(errbuf));
<a name="l00084"></a>00084 len = mbstowcs(NULL, errbuf, 0) + 1;
<a name="l00085"></a>00085 werrbuf = <a class="code" href="ckd__alloc_8h.html#aa00ef21903bc4f8a972488417adc8d2e" title="Macros to simplify the use of above functions.">ckd_calloc</a>(len, <span class="keyword">sizeof</span>(*werrbuf));
<a name="l00086"></a>00086 mbstowcs(werrbuf, errbuf, len);
<a name="l00087"></a>00087
<a name="l00088"></a>00088 OutputDebugStringW(werrbuf);
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="preprocessor">#else</span>
<a name="l00092"></a>00092 <span class="preprocessor"></span><span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00093"></a>00093 wavein_error(<span class="keywordtype">char</span> *src, int32 ret)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <span class="keywordtype">char</span> errbuf[1024];
<a name="l00096"></a>00096
<a name="l00097"></a>00097 waveInGetErrorText(ret, errbuf, <span class="keyword">sizeof</span>(errbuf));
<a name="l00098"></a>00098 fprintf(stderr, <span class="stringliteral">"%s error %d: %s\n"</span>, src, ret, errbuf);
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100 <span class="preprocessor">#endif</span>
<a name="l00101"></a>00101 <span class="preprocessor"></span>
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00104"></a>00104 wavein_free_buf(ad_wbuf_t * b)
<a name="l00105"></a>00105 {
<a name="l00106"></a>00106 GlobalUnlock(b->h_whdr);
<a name="l00107"></a>00107 GlobalFree(b->h_whdr);
<a name="l00108"></a>00108 GlobalUnlock(b->h_buf);
<a name="l00109"></a>00109 GlobalFree(b->h_buf);
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keyword">static</span> int32
<a name="l00114"></a>00114 wavein_alloc_buf(ad_wbuf_t * b, int32 samples_per_buf)
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 HGLOBAL h_buf; <span class="comment">/* handle to data buffer */</span>
<a name="l00117"></a>00117 LPSTR p_buf; <span class="comment">/* pointer to data buffer */</span>
<a name="l00118"></a>00118 HGLOBAL h_whdr; <span class="comment">/* handle to header */</span>
<a name="l00119"></a>00119 LPWAVEHDR p_whdr; <span class="comment">/* pointer to header */</span>
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="comment">/* Allocate data buffer */</span>
<a name="l00122"></a>00122 h_buf =
<a name="l00123"></a>00123 GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE,
<a name="l00124"></a>00124 samples_per_buf * <span class="keyword">sizeof</span>(int16));
<a name="l00125"></a>00125 <span class="keywordflow">if</span> (!h_buf) {
<a name="l00126"></a>00126 fprintf(stderr, <span class="stringliteral">"GlobalAlloc failed\n"</span>);
<a name="l00127"></a>00127 <span class="keywordflow">return</span> -1;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 <span class="keywordflow">if</span> ((p_buf = GlobalLock(h_buf)) == NULL) {
<a name="l00130"></a>00130 GlobalFree(h_buf);
<a name="l00131"></a>00131 fprintf(stderr, <span class="stringliteral">"GlobalLock failed\n"</span>);
<a name="l00132"></a>00132 <span class="keywordflow">return</span> -1;
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="comment">/* Allocate WAVEHDR structure */</span>
<a name="l00136"></a>00136 h_whdr = GlobalAlloc(GMEM_MOVEABLE | GMEM_SHARE, <span class="keyword">sizeof</span>(WAVEHDR));
<a name="l00137"></a>00137 <span class="keywordflow">if</span> (h_whdr == NULL) {
<a name="l00138"></a>00138 GlobalUnlock(h_buf);
<a name="l00139"></a>00139 GlobalFree(h_buf);
<a name="l00140"></a>00140
<a name="l00141"></a>00141 fprintf(stderr, <span class="stringliteral">"GlobalAlloc failed\n"</span>);
<a name="l00142"></a>00142 <span class="keywordflow">return</span> -1;
<a name="l00143"></a>00143 }
<a name="l00144"></a>00144 <span class="keywordflow">if</span> ((p_whdr = GlobalLock(h_whdr)) == NULL) {
<a name="l00145"></a>00145 GlobalUnlock(h_buf);
<a name="l00146"></a>00146 GlobalFree(h_buf);
<a name="l00147"></a>00147 GlobalFree(h_whdr);
<a name="l00148"></a>00148
<a name="l00149"></a>00149 fprintf(stderr, <span class="stringliteral">"GlobalLock failed\n"</span>);
<a name="l00150"></a>00150 <span class="keywordflow">return</span> -1;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152
<a name="l00153"></a>00153 b->h_buf = h_buf;
<a name="l00154"></a>00154 b->p_buf = p_buf;
<a name="l00155"></a>00155 b->h_whdr = h_whdr;
<a name="l00156"></a>00156 b->p_whdr = p_whdr;
<a name="l00157"></a>00157
<a name="l00158"></a>00158 p_whdr->lpData = p_buf;
<a name="l00159"></a>00159 p_whdr->dwBufferLength = samples_per_buf * <span class="keyword">sizeof</span>(int16);
<a name="l00160"></a>00160 p_whdr->dwUser = 0L;
<a name="l00161"></a>00161 p_whdr->dwFlags = 0L;
<a name="l00162"></a>00162 p_whdr->dwLoops = 0L;
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="keywordflow">return</span> 0;
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="keyword">static</span> int32
<a name="l00169"></a>00169 wavein_enqueue_buf(HWAVEIN h, LPWAVEHDR whdr)
<a name="l00170"></a>00170 {
<a name="l00171"></a>00171 int32 st;
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="keywordflow">if</span> ((st = waveInPrepareHeader(h, whdr, <span class="keyword">sizeof</span>(WAVEHDR))) != 0) {
<a name="l00174"></a>00174 wavein_error(<span class="stringliteral">"waveInPrepareHeader"</span>, st);
<a name="l00175"></a>00175 <span class="keywordflow">return</span> -1;
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177 <span class="keywordflow">if</span> ((st = waveInAddBuffer(h, whdr, <span class="keyword">sizeof</span>(WAVEHDR))) != 0) {
<a name="l00178"></a>00178 wavein_error(<span class="stringliteral">"waveInAddBuffer"</span>, st);
<a name="l00179"></a>00179 <span class="keywordflow">return</span> -1;
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182 <span class="keywordflow">return</span> 0;
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00185"></a>00185
<a name="l00186"></a>00186 <span class="keyword">static</span> HWAVEIN
<a name="l00187"></a>00187 wavein_open(int32 samples_per_sec, int32 bytes_per_sample)
<a name="l00188"></a>00188 {
<a name="l00189"></a>00189 WAVEFORMATEX wfmt;
<a name="l00190"></a>00190 int32 st;
<a name="l00191"></a>00191 HWAVEIN h;
<a name="l00192"></a>00192
<a name="l00193"></a>00193 <span class="keywordflow">if</span> (bytes_per_sample != <span class="keyword">sizeof</span>(int16)) {
<a name="l00194"></a>00194 fprintf(stderr, <span class="stringliteral">"bytes/sample != %d\n"</span>, <span class="keyword">sizeof</span>(int16));
<a name="l00195"></a>00195 <span class="keywordflow">return</span> NULL;
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197
<a name="l00198"></a>00198 wfmt.wFormatTag = WAVE_FORMAT_PCM;
<a name="l00199"></a>00199 wfmt.nChannels = 1;
<a name="l00200"></a>00200 wfmt.nSamplesPerSec = samples_per_sec;
<a name="l00201"></a>00201 wfmt.nAvgBytesPerSec = samples_per_sec * bytes_per_sample;
<a name="l00202"></a>00202 wfmt.nBlockAlign = bytes_per_sample;
<a name="l00203"></a>00203 wfmt.wBitsPerSample = 8 * bytes_per_sample;
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <span class="comment">/* There should be a check here for a device of the desired type; later... */</span>
<a name="l00206"></a>00206
<a name="l00207"></a>00207 st = waveInOpen((LPHWAVEIN) & h, WAVE_MAPPER,
<a name="l00208"></a>00208 (LPWAVEFORMATEX) & wfmt, (DWORD) 0L, 0L,
<a name="l00209"></a>00209 (DWORD) CALLBACK_NULL);
<a name="l00210"></a>00210 <span class="keywordflow">if</span> (st != 0) {
<a name="l00211"></a>00211 wavein_error(<span class="stringliteral">"waveInOpen"</span>, st);
<a name="l00212"></a>00212 <span class="keywordflow">return</span> NULL;
<a name="l00213"></a>00213 }
<a name="l00214"></a>00214
<a name="l00215"></a>00215 <span class="keywordflow">return</span> h;
<a name="l00216"></a>00216 }
<a name="l00217"></a>00217
<a name="l00218"></a>00218
<a name="l00219"></a>00219 <span class="keyword">static</span> int32
<a name="l00220"></a>00220 wavein_close(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * r)
<a name="l00221"></a>00221 {
<a name="l00222"></a>00222 int32 i, st;
<a name="l00223"></a>00223
<a name="l00224"></a>00224 <span class="comment">/* Unprepare all buffers; multiple unprepares of the same buffer are benign */</span>
<a name="l00225"></a>00225 <span class="keywordflow">for</span> (i = 0; i < r->n_buf; i++) {
<a name="l00226"></a>00226 <span class="comment">/* Unpreparing an unprepared buffer, on the other hand, fails</span>
<a name="l00227"></a>00227 <span class="comment"> on Win98/WinME, though this is not documented - dhuggins@cs,</span>
<a name="l00228"></a>00228 <span class="comment"> 2004-07-14 */</span>
<a name="l00229"></a>00229 <span class="keywordflow">if</span> (!(r->wi_buf[i].p_whdr->dwFlags & WHDR_PREPARED))
<a name="l00230"></a>00230 <span class="keywordflow">continue</span>;
<a name="l00231"></a>00231 st = waveInUnprepareHeader(r->h_wavein,
<a name="l00232"></a>00232 r->wi_buf[i].p_whdr, <span class="keyword">sizeof</span>(WAVEHDR));
<a name="l00233"></a>00233 <span class="keywordflow">if</span> (st != 0) {
<a name="l00234"></a>00234 wavein_error(<span class="stringliteral">"waveInUnprepareHeader"</span>, st);
<a name="l00235"></a>00235 <span class="keywordflow">return</span> -1;
<a name="l00236"></a>00236 }
<a name="l00237"></a>00237 }
<a name="l00238"></a>00238
<a name="l00239"></a>00239 <span class="comment">/* Free buffers */</span>
<a name="l00240"></a>00240 <span class="keywordflow">for</span> (i = 0; i < r->n_buf; i++)
<a name="l00241"></a>00241 wavein_free_buf(&(r->wi_buf[i]));
<a name="l00242"></a>00242 free(r->wi_buf);
<a name="l00243"></a>00243
<a name="l00244"></a>00244 <span class="keywordflow">if</span> ((st = waveInClose(r->h_wavein)) != 0) {
<a name="l00245"></a>00245 wavein_error(<span class="stringliteral">"waveInClose"</span>, st);
<a name="l00246"></a>00246 <span class="keywordflow">return</span> -1;
<a name="l00247"></a>00247 }
<a name="l00248"></a>00248
<a name="l00249"></a>00249 free(r);
<a name="l00250"></a>00250
<a name="l00251"></a>00251 <span class="keywordflow">return</span> 0;
<a name="l00252"></a>00252 }
<a name="l00253"></a>00253
<a name="l00254"></a>00254
<a name="l00255"></a>00255 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *
<a name="l00256"></a>00256 ad_open_sps_bufsize(int32 sps, int32 bufsize_msec)
<a name="l00257"></a>00257 {
<a name="l00258"></a>00258 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *r;
<a name="l00259"></a>00259 int32 i, j;
<a name="l00260"></a>00260 HWAVEIN h;
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="keywordflow">if</span> ((h = wavein_open(sps, <span class="keyword">sizeof</span>(int16))) == NULL)
<a name="l00263"></a>00263 <span class="keywordflow">return</span> NULL;
<a name="l00264"></a>00264
<a name="l00265"></a>00265 <span class="keywordflow">if</span> ((r = (<a class="code" href="structad__rec__t.html">ad_rec_t</a> *) malloc(<span class="keyword">sizeof</span>(<a class="code" href="structad__rec__t.html">ad_rec_t</a>))) == NULL) {
<a name="l00266"></a>00266 fprintf(stderr, <span class="stringliteral">"malloc(%d) failed\n"</span>, <span class="keyword">sizeof</span>(<a class="code" href="structad__rec__t.html">ad_rec_t</a>));
<a name="l00267"></a>00267 waveInClose(h);
<a name="l00268"></a>00268 <span class="keywordflow">return</span> NULL;
<a name="l00269"></a>00269 }
<a name="l00270"></a>00270
<a name="l00271"></a>00271 r->n_buf = ((sps * bufsize_msec) / 1000) / WI_BUFSIZE;
<a name="l00272"></a>00272 <span class="keywordflow">if</span> (r->n_buf < DEFAULT_N_WI_BUF)
<a name="l00273"></a>00273 r->n_buf = DEFAULT_N_WI_BUF;
<a name="l00274"></a>00274 printf(<span class="stringliteral">"Allocating %d buffers of %d samples each\n"</span>, r->n_buf,
<a name="l00275"></a>00275 WI_BUFSIZE);
<a name="l00276"></a>00276
<a name="l00277"></a>00277 <span class="keywordflow">if</span> ((r->wi_buf =
<a name="l00278"></a>00278 (ad_wbuf_t *) calloc(r->n_buf, <span class="keyword">sizeof</span>(ad_wbuf_t))) == NULL) {
<a name="l00279"></a>00279 fprintf(stderr, <span class="stringliteral">"calloc(%d,%d) failed\n"</span>, r->n_buf,
<a name="l00280"></a>00280 <span class="keyword">sizeof</span>(ad_wbuf_t));
<a name="l00281"></a>00281 free(r);
<a name="l00282"></a>00282 waveInClose(h);
<a name="l00283"></a>00283
<a name="l00284"></a>00284 <span class="keywordflow">return</span> NULL;
<a name="l00285"></a>00285 }
<a name="l00286"></a>00286 <span class="keywordflow">for</span> (i = 0; i < r->n_buf; i++) {
<a name="l00287"></a>00287 <span class="keywordflow">if</span> (wavein_alloc_buf(&(r->wi_buf[i]), WI_BUFSIZE) < 0) {
<a name="l00288"></a>00288 <span class="keywordflow">for</span> (j = 0; j < i; j++)
<a name="l00289"></a>00289 wavein_free_buf(&(r->wi_buf[j]));
<a name="l00290"></a>00290 free(r->wi_buf);
<a name="l00291"></a>00291 free(r);
<a name="l00292"></a>00292 waveInClose(h);
<a name="l00293"></a>00293
<a name="l00294"></a>00294 <span class="keywordflow">return</span> NULL;
<a name="l00295"></a>00295 }
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 r->h_wavein = h;
<a name="l00299"></a>00299 r->opened = 1;
<a name="l00300"></a>00300 r->recording = 0;
<a name="l00301"></a>00301 r->curbuf = r->n_buf - 1; <span class="comment">/* current buffer with data for application */</span>
<a name="l00302"></a>00302 r->curlen = 0; <span class="comment">/* #samples in curbuf remaining to be consumed */</span>
<a name="l00303"></a>00303 r->lastbuf = r->curbuf;
<a name="l00304"></a>00304 r-><a class="code" href="structad__rec__t.html#ac8ccccdc755f68cb4ad24007b36d6c8a" title="Samples/sec.">sps</a> = sps;
<a name="l00305"></a>00305 r-><a class="code" href="structad__rec__t.html#ade5a608978908d87deea7fa9827f8510" title="Bytes/sample.">bps</a> = <span class="keyword">sizeof</span>(int16); <span class="comment">/* HACK!! Hardwired value for bytes/sec */</span>
<a name="l00306"></a>00306
<a name="l00307"></a>00307 <span class="keywordflow">return</span> r;
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309
<a name="l00310"></a>00310 <span class="comment">/* FIXME: Dummy function, doesn't actually use dev. */</span>
<a name="l00311"></a>00311 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *
<a name="l00312"></a>00312 <a class="code" href="ad_8h.html#a43f66257a2457d6c711dc5c694bfc02f" title="Open a specific audio device for recording.">ad_open_dev</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *dev, int32 sps)
<a name="l00313"></a>00313 {
<a name="l00314"></a>00314 <span class="keywordflow">return</span> (ad_open_sps_bufsize
<a name="l00315"></a>00315 (sps, WI_BUFSIZE * DEFAULT_N_WI_BUF * 1000 / sps));
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317
<a name="l00318"></a>00318
<a name="l00319"></a>00319 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *
<a name="l00320"></a>00320 <a class="code" href="ad_8h.html#a71b4eec805fbe5c398ea0897816de6f0" title="Open the default audio device with a given sampling rate.">ad_open_sps</a>(int32 sps)
<a name="l00321"></a>00321 {
<a name="l00322"></a>00322 <span class="keywordflow">return</span> (ad_open_sps_bufsize
<a name="l00323"></a>00323 (sps, WI_BUFSIZE * DEFAULT_N_WI_BUF * 1000 / sps));
<a name="l00324"></a>00324 }
<a name="l00325"></a>00325
<a name="l00326"></a>00326
<a name="l00327"></a>00327 <a class="code" href="structad__rec__t.html">ad_rec_t</a> *
<a name="l00328"></a>00328 <a class="code" href="ad_8h.html#a3def0da951e840fb4c72ef9259540686" title="Open the default audio device.">ad_open</a>(<span class="keywordtype">void</span>)
<a name="l00329"></a>00329 {
<a name="l00330"></a>00330 <span class="keywordflow">return</span> (<a class="code" href="ad_8h.html#a71b4eec805fbe5c398ea0897816de6f0" title="Open the default audio device with a given sampling rate.">ad_open_sps</a>(DEFAULT_SAMPLES_PER_SEC)); <span class="comment">/* HACK!! Rename this constant */</span>
<a name="l00331"></a>00331 }
<a name="l00332"></a>00332
<a name="l00333"></a>00333
<a name="l00334"></a>00334 int32
<a name="l00335"></a>00335 ad_close(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * r)
<a name="l00336"></a>00336 {
<a name="l00337"></a>00337 <span class="keywordflow">if</span> (!r->opened)
<a name="l00338"></a>00338 <span class="keywordflow">return</span> AD_ERR_NOT_OPEN;
<a name="l00339"></a>00339
<a name="l00340"></a>00340 <span class="keywordflow">if</span> (r->recording)
<a name="l00341"></a>00341 <span class="keywordflow">if</span> (ad_stop_rec(r) < 0)
<a name="l00342"></a>00342 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00343"></a>00343
<a name="l00344"></a>00344 <span class="keywordflow">if</span> (wavein_close(r) < 0)
<a name="l00345"></a>00345 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00346"></a>00346
<a name="l00347"></a>00347 <span class="keywordflow">return</span> 0;
<a name="l00348"></a>00348 }
<a name="l00349"></a>00349
<a name="l00350"></a>00350
<a name="l00351"></a>00351 int32
<a name="l00352"></a>00352 ad_start_rec(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * r)
<a name="l00353"></a>00353 {
<a name="l00354"></a>00354 int32 i;
<a name="l00355"></a>00355
<a name="l00356"></a>00356 <span class="keywordflow">if</span> ((!r->opened) || r->recording)
<a name="l00357"></a>00357 <span class="keywordflow">return</span> -1;
<a name="l00358"></a>00358
<a name="l00359"></a>00359 <span class="keywordflow">for</span> (i = 0; i < r->n_buf; i++)
<a name="l00360"></a>00360 <span class="keywordflow">if</span> (wavein_enqueue_buf(r->h_wavein, r->wi_buf[i].p_whdr) < 0)
<a name="l00361"></a>00361 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00362"></a>00362 r->curbuf = r->n_buf - 1; <span class="comment">/* current buffer with data for application */</span>
<a name="l00363"></a>00363 r->curlen = 0; <span class="comment">/* #samples in curbuf remaining to be consumed */</span>
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="keywordflow">if</span> (waveInStart(r->h_wavein) != 0)
<a name="l00366"></a>00366 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00367"></a>00367
<a name="l00368"></a>00368 r->recording = 1;
<a name="l00369"></a>00369
<a name="l00370"></a>00370 <span class="keywordflow">return</span> 0;
<a name="l00371"></a>00371 }
<a name="l00372"></a>00372
<a name="l00373"></a>00373
<a name="l00374"></a>00374 int32
<a name="l00375"></a>00375 ad_stop_rec(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * r)
<a name="l00376"></a>00376 {
<a name="l00377"></a>00377 int32 i, st;
<a name="l00378"></a>00378
<a name="l00379"></a>00379 <span class="keywordflow">if</span> ((!r->opened) || (!r->recording))
<a name="l00380"></a>00380 <span class="keywordflow">return</span> -1;
<a name="l00381"></a>00381
<a name="l00382"></a>00382 <span class="keywordflow">if</span> (waveInStop(r->h_wavein) != 0)
<a name="l00383"></a>00383 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00384"></a>00384
<a name="l00385"></a>00385 <span class="keywordflow">if</span> ((st = waveInReset(r->h_wavein)) != 0) {
<a name="l00386"></a>00386 wavein_error(<span class="stringliteral">"waveInReset"</span>, st);
<a name="l00387"></a>00387 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00388"></a>00388 }
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="comment">/* Wait until all buffers marked done */</span>
<a name="l00391"></a>00391 <span class="keywordflow">for</span> (i = 0; i < r->n_buf; i++)
<a name="l00392"></a>00392 <span class="keywordflow">while</span> (!(r->wi_buf[i].p_whdr->dwFlags & WHDR_DONE));
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="keywordflow">if</span> ((r->lastbuf = r->curbuf - 1) < 0)
<a name="l00395"></a>00395 r->lastbuf = r->n_buf - 1;
<a name="l00396"></a>00396
<a name="l00397"></a>00397 r->recording = 0;
<a name="l00398"></a>00398
<a name="l00399"></a>00399 <span class="keywordflow">return</span> 0;
<a name="l00400"></a>00400 }
<a name="l00401"></a>00401
<a name="l00402"></a>00402
<a name="l00403"></a>00403 int32
<a name="l00404"></a>00404 ad_read(<a class="code" href="structad__rec__t.html">ad_rec_t</a> * r, int16 * buf, int32 max)
<a name="l00405"></a>00405 {
<a name="l00406"></a>00406 int32 t, st, len;
<a name="l00407"></a>00407 LPWAVEHDR whdr;
<a name="l00408"></a>00408 int16 *sysbufp;
<a name="l00409"></a>00409
<a name="l00410"></a>00410 <span class="keywordflow">if</span> (!r->opened)
<a name="l00411"></a>00411 <span class="keywordflow">return</span> AD_ERR_NOT_OPEN;
<a name="l00412"></a>00412
<a name="l00413"></a>00413 <span class="comment">/* Check if all recorded data exhausted */</span>
<a name="l00414"></a>00414 <span class="keywordflow">if</span> ((!r->recording) && (r->curbuf == r->lastbuf)
<a name="l00415"></a>00415 && (r->curlen == 0))
<a name="l00416"></a>00416 <span class="keywordflow">return</span> AD_EOF;
<a name="l00417"></a>00417
<a name="l00418"></a>00418 len = 0;
<a name="l00419"></a>00419 <span class="keywordflow">while</span> (max > 0) {
<a name="l00420"></a>00420 <span class="comment">/* Look for next buffer with recording data */</span>
<a name="l00421"></a>00421 <span class="keywordflow">if</span> (r->curlen == 0) {
<a name="l00422"></a>00422 <span class="comment">/* No current buffer with data; get next buffer in sequence if available */</span>
<a name="l00423"></a>00423 t = r->curbuf + 1;
<a name="l00424"></a>00424 <span class="keywordflow">if</span> (t >= r->n_buf)
<a name="l00425"></a>00425 t = 0;
<a name="l00426"></a>00426
<a name="l00427"></a>00427 <span class="keywordflow">if</span> (!(r->wi_buf[t].p_whdr->dwFlags & WHDR_DONE))
<a name="l00428"></a>00428 <span class="keywordflow">return</span> len;
<a name="l00429"></a>00429
<a name="l00430"></a>00430 r->curbuf = t;
<a name="l00431"></a>00431 r->curlen = r->wi_buf[t].p_whdr->dwBytesRecorded >> 1;
<a name="l00432"></a>00432 r->curoff = 0;
<a name="l00433"></a>00433 }
<a name="l00434"></a>00434
<a name="l00435"></a>00435 <span class="comment">/* Copy data from curbuf to buf */</span>
<a name="l00436"></a>00436 whdr = r->wi_buf[r->curbuf].p_whdr;
<a name="l00437"></a>00437 t = (max < r->curlen) ? max : r->curlen; <span class="comment">/* #Samples to copy */</span>
<a name="l00438"></a>00438
<a name="l00439"></a>00439 if (t > 0) {
<a name="l00440"></a>00440 sysbufp = (int16 *) (whdr->lpData);
<a name="l00441"></a>00441 memcpy(buf, sysbufp + r->curoff, t * <span class="keyword">sizeof</span>(int16));
<a name="l00442"></a>00442
<a name="l00443"></a>00443 buf += t;
<a name="l00444"></a>00444 max -= t;
<a name="l00445"></a>00445 r->curoff += t;
<a name="l00446"></a>00446 r->curlen -= t;
<a name="l00447"></a>00447 len += t;
<a name="l00448"></a>00448 }
<a name="l00449"></a>00449
<a name="l00450"></a>00450 <span class="comment">/* If curbuf empty recycle it to system if still recording */</span>
<a name="l00451"></a>00451 <span class="keywordflow">if</span> (r->curlen == 0) {
<a name="l00452"></a>00452 <span class="keywordflow">if</span> (r->recording) {
<a name="l00453"></a>00453 <span class="comment">/* Return empty buffer to system */</span>
<a name="l00454"></a>00454 st = waveInUnprepareHeader(r->h_wavein,
<a name="l00455"></a>00455 whdr, <span class="keyword">sizeof</span>(WAVEHDR));
<a name="l00456"></a>00456 <span class="keywordflow">if</span> (st != 0) {
<a name="l00457"></a>00457 wavein_error(<span class="stringliteral">"waveInUnprepareHeader"</span>, st);
<a name="l00458"></a>00458 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00459"></a>00459 }
<a name="l00460"></a>00460
<a name="l00461"></a>00461 <span class="keywordflow">if</span> (wavein_enqueue_buf(r->h_wavein, whdr) < 0)
<a name="l00462"></a>00462 <span class="keywordflow">return</span> AD_ERR_WAVE;
<a name="l00463"></a>00463
<a name="l00464"></a>00464 }
<a name="l00465"></a>00465 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (r->curbuf == r->lastbuf) {
<a name="l00466"></a>00466 <span class="keywordflow">return</span> len;
<a name="l00467"></a>00467 }
<a name="l00468"></a>00468 }
<a name="l00469"></a>00469 }
<a name="l00470"></a>00470
<a name="l00471"></a>00471 <span class="keywordflow">return</span> len;
<a name="l00472"></a>00472 }
</pre></div></div>
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