1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
|
<HTML>
<HEAD>
<TITLE>The Synthesis ToolKit in C++ (STK)</TITLE>
<LINK HREF="doxygen.css" REL="stylesheet" TYPE="text/css">
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<CENTER>
<img src="princeton.gif"> <img src="ccrma.gif"> <img src="mcgill.gif"><P>
<a class="qindex" href="index.html">Home</a> <a class="qindex" href="information.html">Information</a> <a class="qindex" href="classes.html">Classes</a> <a class="qindex" href="download.html">Download</a> <a class="qindex" href="usage.html">Usage</a> <a class="qindex" href="maillist.html">Mail List</a> <a class="qindex" href="system.html">Requirements</a> <a class="qindex" href="links.html">Links</a> <a class="qindex" href="faq.html">FAQ</a> <a class="qindex" href="tutorial.html">Tutorial</a></CENTER>
<HR>
<!-- Generated by Doxygen 1.6.2 -->
<div class="navpath"><a class="el" href="namespacestk.html">stk</a>::<a class="el" href="classstk_1_1TapDelay.html">TapDelay</a>
</div>
<div class="contents">
<h1>stk::TapDelay Class Reference</h1><!-- doxytag: class="stk::TapDelay" --><!-- doxytag: inherits="stk::Filter" -->
<p>STK non-interpolating tapped delay line class.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="TapDelay_8h_source.html">TapDelay.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for stk::TapDelay:</div>
<div class="dynsection">
<div class="center">
<img src="classstk_1_1TapDelay.png" usemap="#stk::TapDelay_map" alt=""/>
<map id="stk::TapDelay_map" name="stk::TapDelay_map">
<area href="classstk_1_1Filter.html" alt="stk::Filter" shape="rect" coords="0,56,87,80"/>
<area href="classstk_1_1Stk.html" alt="stk::Stk" shape="rect" coords="0,0,87,24"/>
</map>
</div>
</div>
<p><a href="classstk_1_1TapDelay-members.html">List of all members.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#a24913411dff23e05995979e42cc51ecc">TapDelay</a> (std::vector< unsigned long > taps=std::vector< unsigned long >(1, 0), unsigned long maxDelay=4095)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The default constructor creates a delay-line with maximum length of 4095 samples and a single tap at delay = 0. <a href="#a24913411dff23e05995979e42cc51ecc"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6980be10c3d3cb9633af1733b40e49cc"></a><!-- doxytag: member="stk::TapDelay::~TapDelay" ref="a6980be10c3d3cb9633af1733b40e49cc" args="()" -->
</td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#a6980be10c3d3cb9633af1733b40e49cc">~TapDelay</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Class destructor. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#a104b7bd81435a38191e1e43a24cb471d">setMaximumDelay</a> (unsigned long delay)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the maximum delay-line length. <a href="#a104b7bd81435a38191e1e43a24cb471d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#aa2bbab19ae277dc3689471d4250f00ad">setTapDelays</a> (std::vector< unsigned long > taps)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the delay-line tap lengths. <a href="#aa2bbab19ae277dc3689471d4250f00ad"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aad3736becdec6059f2986f873d69b971"></a><!-- doxytag: member="stk::TapDelay::getTapDelays" ref="aad3736becdec6059f2986f873d69b971" args="(void) const " -->
std::vector< unsigned long > </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#aad3736becdec6059f2986f873d69b971">getTapDelays</a> (void) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the current delay-line length. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">StkFloat </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#a517399ddf52455ef083481cbb77c0b5c">lastOut</a> (unsigned int tap=0) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return the specified tap value of the last computed frame. <a href="#a517399ddf52455ef083481cbb77c0b5c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#aadd431e206dd1e4133e2ff0d49aa639b">tick</a> (StkFloat input, <a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> &outputs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Input one sample to the delayline and return outputs at all tap positions. <a href="#aadd431e206dd1e4133e2ff0d49aa639b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#a9255a00f0d7588ba5b51a12ba5db08c0">tick</a> (<a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> &frames, unsigned int channel=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Take a channel of the <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> object as inputs to the filter and write outputs back to the same object. <a href="#a9255a00f0d7588ba5b51a12ba5db08c0"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classstk_1_1TapDelay.html#ad8250d2802326bd3778c00642266d201">tick</a> (<a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> &iFrames, <a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> &oFrames, unsigned int iChannel=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Take a channel of the <code>iFrames</code> object as inputs to the filter and write outputs to the <code>oFrames</code> object. <a href="#ad8250d2802326bd3778c00642266d201"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>STK non-interpolating tapped delay line class. </p>
<p>This class implements a non-interpolating digital delay-line with an arbitrary number of output "taps". If the maximum length and tap delays are not specified during instantiation, a fixed maximum length of 4095 and a single tap delay of zero is set.</p>
<p>A non-interpolating delay line is typically used in fixed delay-length applications, such as for reverberation.</p>
<p>by Perry R. Cook and Gary P. Scavone, 1995-2012. </p>
<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a24913411dff23e05995979e42cc51ecc"></a><!-- doxytag: member="stk::TapDelay::TapDelay" ref="a24913411dff23e05995979e42cc51ecc" args="(std::vector< unsigned long > taps=std::vector< unsigned long >(1, 0), unsigned long maxDelay=4095)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">stk::TapDelay::TapDelay </td>
<td>(</td>
<td class="paramtype">std::vector< unsigned long > </td>
<td class="paramname"> <em>taps</em> = <code>std::vector< unsigned long >(1, 0)</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned long </td>
<td class="paramname"> <em>maxDelay</em> = <code>4095</code></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>The default constructor creates a delay-line with maximum length of 4095 samples and a single tap at delay = 0. </p>
<p>An <a class="el" href="classstk_1_1StkError.html" title="STK error handling class.">StkError</a> will be thrown if any tap delay parameter is less than zero, the maximum delay parameter is less than one, or any tap delay parameter is greater than the maxDelay value. </p>
</div>
</div>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a104b7bd81435a38191e1e43a24cb471d"></a><!-- doxytag: member="stk::TapDelay::setMaximumDelay" ref="a104b7bd81435a38191e1e43a24cb471d" args="(unsigned long delay)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void stk::TapDelay::setMaximumDelay </td>
<td>(</td>
<td class="paramtype">unsigned long </td>
<td class="paramname"> <em>delay</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Set the maximum delay-line length. </p>
<p>This method should generally only be used during initial setup of the delay line. If it is used between calls to the <a class="el" href="classstk_1_1TapDelay.html#aadd431e206dd1e4133e2ff0d49aa639b" title="Input one sample to the delayline and return outputs at all tap positions.">tick()</a> function, without a call to <a class="el" href="classstk_1_1Filter.html#a670b9cc23ac798d3239cb819e801363c" title="Clears all internal states of the filter.">clear()</a>, a signal discontinuity will likely occur. If the current maximum length is greater than the new length, no change will be made. </p>
</div>
</div>
<a class="anchor" id="aa2bbab19ae277dc3689471d4250f00ad"></a><!-- doxytag: member="stk::TapDelay::setTapDelays" ref="aa2bbab19ae277dc3689471d4250f00ad" args="(std::vector< unsigned long > taps)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void stk::TapDelay::setTapDelays </td>
<td>(</td>
<td class="paramtype">std::vector< unsigned long > </td>
<td class="paramname"> <em>taps</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Set the delay-line tap lengths. </p>
<p>The valid range for each tap length is from 0 to the maximum delay-line length. </p>
</div>
</div>
<a class="anchor" id="a517399ddf52455ef083481cbb77c0b5c"></a><!-- doxytag: member="stk::TapDelay::lastOut" ref="a517399ddf52455ef083481cbb77c0b5c" args="(unsigned int tap=0) const " -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">StkFloat stk::TapDelay::lastOut </td>
<td>(</td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>tap</em> = <code>0</code></td>
<td> ) </td>
<td> const<code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Return the specified tap value of the last computed frame. </p>
<p>Use the <a class="el" href="classstk_1_1Filter.html#ab2d944f649693511dced1df249f0abe6" title="Return an StkFrames reference to the last output sample frame.">lastFrame()</a> function to get all tap values from the last computed frame. The <code>tap</code> argument must be less than the number of delayline taps (the first tap is specified by 0). However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an <a class="el" href="classstk_1_1StkError.html" title="STK error handling class.">StkError</a> exception. </p>
<p><div class="fragment"><pre class="fragment"><a name="l00116"></a>00116 {
<a name="l00117"></a>00117 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
<a name="l00118"></a>00118 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( tap >= lastFrame_.size() ) ) {
<a name="l00119"></a>00119 oStream_ << <span class="stringliteral">"TapDelay::lastOut(): tap argument and number of taps are incompatible!"</span>;
<a name="l00120"></a>00120 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122 <span class="preprocessor">#endif</span>
<a name="l00123"></a>00123 <span class="preprocessor"></span>
<a name="l00124"></a>00124 <span class="keywordflow">return</span> lastFrame_[tap];
<a name="l00125"></a>00125 }
</pre></div></p>
</div>
</div>
<a class="anchor" id="aadd431e206dd1e4133e2ff0d49aa639b"></a><!-- doxytag: member="stk::TapDelay::tick" ref="aadd431e206dd1e4133e2ff0d49aa639b" args="(StkFloat input, StkFrames &outputs)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & stk::TapDelay::tick </td>
<td>(</td>
<td class="paramtype">StkFloat </td>
<td class="paramname"> <em>input</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td>
<td class="paramname"> <em>outputs</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Input one sample to the delayline and return outputs at all tap positions. </p>
<p>The <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> argument reference is returned. The output values are ordered according to the tap positions set using the <a class="el" href="classstk_1_1TapDelay.html#aa2bbab19ae277dc3689471d4250f00ad" title="Set the delay-line tap lengths.">setTapDelays()</a> function (no sorting is performed). The <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> argument must contain at least as many channels as the number of taps. However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an <a class="el" href="classstk_1_1StkError.html" title="STK error handling class.">StkError</a> exception. </p>
<p><div class="fragment"><pre class="fragment"><a name="l00128"></a>00128 {
<a name="l00129"></a>00129 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
<a name="l00130"></a>00130 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( outputs.channels() < outPoint_.size() ) {
<a name="l00131"></a>00131 oStream_ << <span class="stringliteral">"TapDelay::tick(): number of taps > channels in StkFrames argument!"</span>;
<a name="l00132"></a>00132 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 <span class="preprocessor">#endif</span>
<a name="l00135"></a>00135 <span class="preprocessor"></span>
<a name="l00136"></a>00136 inputs_[inPoint_++] = input * gain_;
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="comment">// Check for end condition</span>
<a name="l00139"></a>00139 <span class="keywordflow">if</span> ( inPoint_ == inputs_.size() )
<a name="l00140"></a>00140 inPoint_ = 0;
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="comment">// Read out next values</span>
<a name="l00143"></a>00143 StkFloat *outs = &outputs[0];
<a name="l00144"></a>00144 <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<outPoint_.size(); i++ ) {
<a name="l00145"></a>00145 *outs++ = inputs_[outPoint_[i]];
<a name="l00146"></a>00146 lastFrame_[i] = *outs;
<a name="l00147"></a>00147 <span class="keywordflow">if</span> ( ++outPoint_[i] == inputs_.size() )
<a name="l00148"></a>00148 outPoint_[i] = 0;
<a name="l00149"></a>00149 }
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="keywordflow">return</span> outputs;
<a name="l00152"></a>00152 }
</pre></div></p>
</div>
</div>
<a class="anchor" id="a9255a00f0d7588ba5b51a12ba5db08c0"></a><!-- doxytag: member="stk::TapDelay::tick" ref="a9255a00f0d7588ba5b51a12ba5db08c0" args="(StkFrames &frames, unsigned int channel=0)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & stk::TapDelay::tick </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td>
<td class="paramname"> <em>frames</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>channel</em> = <code>0</code></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [inline, virtual]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Take a channel of the <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> object as inputs to the filter and write outputs back to the same object. </p>
<p>The <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> argument reference is returned. The output values are ordered according to the tap positions set using the <a class="el" href="classstk_1_1TapDelay.html#aa2bbab19ae277dc3689471d4250f00ad" title="Set the delay-line tap lengths.">setTapDelays()</a> function (no sorting is performed). The <a class="el" href="classstk_1_1StkFrames.html" title="An STK class to handle vectorized audio data.">StkFrames</a> argument must contain at least as many channels as the number of taps. However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an <a class="el" href="classstk_1_1StkError.html" title="STK error handling class.">StkError</a> exception. </p>
<p>Implements <a class="el" href="classstk_1_1Filter.html#a3260a238824c4a748ac057b84b7d3f21">stk::Filter</a>.</p>
<p><div class="fragment"><pre class="fragment"><a name="l00155"></a>00155 {
<a name="l00156"></a>00156 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
<a name="l00157"></a>00157 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( channel >= frames.channels() ) {
<a name="l00158"></a>00158 oStream_ << <span class="stringliteral">"TapDelay::tick(): channel and StkFrames arguments are incompatible!"</span>;
<a name="l00159"></a>00159 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161 <span class="keywordflow">if</span> ( frames.channels() < outPoint_.size() ) {
<a name="l00162"></a>00162 oStream_ << <span class="stringliteral">"TapDelay::tick(): number of taps > channels in StkFrames argument!"</span>;
<a name="l00163"></a>00163 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 <span class="preprocessor">#endif</span>
<a name="l00166"></a>00166 <span class="preprocessor"></span>
<a name="l00167"></a>00167 StkFloat *iSamples = &frames[channel];
<a name="l00168"></a>00168 StkFloat *oSamples = &frames[0];
<a name="l00169"></a>00169 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> j, iHop = frames.channels(), oHop = frames.channels() - outPoint_.size();
<a name="l00170"></a>00170 <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<frames.frames(); i++, iSamples += iHop, oSamples += oHop ) {
<a name="l00171"></a>00171 inputs_[inPoint_++] = *iSamples * gain_;
<a name="l00172"></a>00172 <span class="keywordflow">if</span> ( inPoint_ == inputs_.size() ) inPoint_ = 0;
<a name="l00173"></a>00173 <span class="keywordflow">for</span> ( j=0; j<outPoint_.size(); j++ ) {
<a name="l00174"></a>00174 *oSamples++ = inputs_[outPoint_[j]];
<a name="l00175"></a>00175 <span class="keywordflow">if</span> ( ++outPoint_[j] == inputs_.size() ) outPoint_[j] = 0;
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179 oSamples -= frames.channels();
<a name="l00180"></a>00180 <span class="keywordflow">for</span> ( j=0; j<outPoint_.size(); j++ ) lastFrame_[j] = *oSamples++;
<a name="l00181"></a>00181 <span class="keywordflow">return</span> frames;
<a name="l00182"></a>00182 }
</pre></div></p>
</div>
</div>
<a class="anchor" id="ad8250d2802326bd3778c00642266d201"></a><!-- doxytag: member="stk::TapDelay::tick" ref="ad8250d2802326bd3778c00642266d201" args="(StkFrames &iFrames, StkFrames &oFrames, unsigned int iChannel=0)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & stk::TapDelay::tick </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td>
<td class="paramname"> <em>iFrames</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstk_1_1StkFrames.html">StkFrames</a> & </td>
<td class="paramname"> <em>oFrames</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>iChannel</em> = <code>0</code></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [inline]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Take a channel of the <code>iFrames</code> object as inputs to the filter and write outputs to the <code>oFrames</code> object. </p>
<p>The <code>iFrames</code> object reference is returned. The output values are ordered according to the tap positions set using the <a class="el" href="classstk_1_1TapDelay.html#aa2bbab19ae277dc3689471d4250f00ad" title="Set the delay-line tap lengths.">setTapDelays()</a> function (no sorting is performed). The <code>iChannel</code> argument must be less than the number of channels in the <code>iFrames</code> argument (the first channel is specified by 0). The <code>oFrames</code> argument must contain at least as many channels as the number of taps. However, range checking is only performed if _STK_DEBUG_ is defined during compilation, in which case an out-of-range value will trigger an <a class="el" href="classstk_1_1StkError.html" title="STK error handling class.">StkError</a> exception. </p>
<p><div class="fragment"><pre class="fragment"><a name="l00185"></a>00185 {
<a name="l00186"></a>00186 <span class="preprocessor">#if defined(_STK_DEBUG_)</span>
<a name="l00187"></a>00187 <span class="preprocessor"></span> <span class="keywordflow">if</span> ( iChannel >= iFrames.channels() ) {
<a name="l00188"></a>00188 oStream_ << <span class="stringliteral">"TapDelay::tick(): channel and StkFrames arguments are incompatible!"</span>;
<a name="l00189"></a>00189 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191 <span class="keywordflow">if</span> ( oFrames.channels() < outPoint_.size() ) {
<a name="l00192"></a>00192 oStream_ << <span class="stringliteral">"TapDelay::tick(): number of taps > channels in output StkFrames argument!"</span>;
<a name="l00193"></a>00193 <a class="code" href="classstk_1_1Stk.html#a48ac73a0d8ca28445ba1a054e1f061ff" title="Static function for error reporting and handling using c-strings.">handleError</a>( StkError::FUNCTION_ARGUMENT );
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195 <span class="preprocessor">#endif</span>
<a name="l00196"></a>00196 <span class="preprocessor"></span>
<a name="l00197"></a>00197 StkFloat *iSamples = &iFrames[iChannel];
<a name="l00198"></a>00198 StkFloat *oSamples = &oFrames[0];
<a name="l00199"></a>00199 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> j, iHop = iFrames.channels(), oHop = oFrames.channels() - outPoint_.size();
<a name="l00200"></a>00200 <span class="keywordflow">for</span> ( <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<iFrames.frames(); i++, iSamples += iHop, oSamples += oHop ) {
<a name="l00201"></a>00201 inputs_[inPoint_++] = *iSamples * gain_;
<a name="l00202"></a>00202 <span class="keywordflow">if</span> ( inPoint_ == inputs_.size() ) inPoint_ = 0;
<a name="l00203"></a>00203 <span class="keywordflow">for</span> ( j=0; j<outPoint_.size(); j++ ) {
<a name="l00204"></a>00204 *oSamples++ = inputs_[outPoint_[j]];
<a name="l00205"></a>00205 <span class="keywordflow">if</span> ( ++outPoint_[j] == inputs_.size() ) outPoint_[j] = 0;
<a name="l00206"></a>00206 }
<a name="l00207"></a>00207 }
<a name="l00208"></a>00208
<a name="l00209"></a>00209 oSamples -= oFrames.channels();
<a name="l00210"></a>00210 <span class="keywordflow">for</span> ( j=0; j<outPoint_.size(); j++ ) lastFrame_[j] = *oSamples++;
<a name="l00211"></a>00211 <span class="keywordflow">return</span> iFrames;
<a name="l00212"></a>00212 }
</pre></div></p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="TapDelay_8h_source.html">TapDelay.h</a></li>
</ul>
</div>
<HR>
<table>
<tr><td><A HREF="http://ccrma.stanford.edu/software/stk/"><I>The Synthesis ToolKit in C++ (STK)</I></A></td></tr>
<tr><td>©1995-2012 Perry R. Cook and Gary P. Scavone. All Rights Reserved.</td></tr>
</table>
</BODY>
</HTML>
|
