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<h1>TimeSlice.hpp</h1>  </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* This file is part of Raul.</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2007-2009 David Robillard &lt;http://drobilla.net&gt;</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * Raul is free software; you can redistribute it and/or modify it under the</span>
<a name="l00005"></a>00005 <span class="comment"> * terms of the GNU General Public License as published by the Free Software</span>
<a name="l00006"></a>00006 <span class="comment"> * Foundation; either version 2 of the License, or (at your option) any later</span>
<a name="l00007"></a>00007 <span class="comment"> * version.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * Raul is distributed in the hope that it will be useful, but WITHOUT ANY</span>
<a name="l00010"></a>00010 <span class="comment"> * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS</span>
<a name="l00011"></a>00011 <span class="comment"> * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.</span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * You should have received a copy of the GNU General Public License along</span>
<a name="l00014"></a>00014 <span class="comment"> * with this program; if not, write to the Free Software Foundation, Inc.,</span>
<a name="l00015"></a>00015 <span class="comment"> * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00016"></a>00016 <span class="comment"> */</span>
<a name="l00017"></a>00017 
<a name="l00018"></a>00018 <span class="preprocessor">#ifndef RAUL_TIME_SLICE_HPP</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span><span class="preprocessor">#define RAUL_TIME_SLICE_HPP</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include &lt;cassert&gt;</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include &lt;cmath&gt;</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include &lt;boost/utility.hpp&gt;</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include &quot;raul/TimeStamp.hpp&quot;</span>
<a name="l00025"></a>00025 
<a name="l00026"></a>00026 <span class="keyword">namespace </span>Raul {
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 
<a name="l00029"></a>00029 <span class="comment">/* FIXME: all the conversion here is wrong now */</span>
<a name="l00030"></a>00030 
<a name="l00049"></a><a class="code" href="classRaul_1_1TimeSlice.html">00049</a> <span class="keyword">class </span><a class="code" href="classRaul_1_1TimeSlice.html" title="A duration of time, with conversion between tick time and beat time.">TimeSlice</a> : <span class="keyword">public</span> boost::noncopyable {
<a name="l00050"></a>00050 <span class="keyword">public</span>:
<a name="l00051"></a>00051     <a class="code" href="classRaul_1_1TimeSlice.html" title="A duration of time, with conversion between tick time and beat time.">TimeSlice</a>(uint32_t rate, uint32_t ppqn, <span class="keywordtype">double</span> bpm)
<a name="l00052"></a>00052         : _tick_rate(rate)
<a name="l00053"></a>00053         , _beat_rate(60.0/bpm)
<a name="l00054"></a>00054         , _start_ticks(<a class="code" href="classRaul_1_1TimeUnit.html" title="A type of time stamp.">Raul::TimeUnit</a>(Raul::TimeUnit::FRAMES, rate), 0, 0)
<a name="l00055"></a>00055         , _length_ticks(<a class="code" href="classRaul_1_1TimeUnit.html" title="A type of time stamp.">TimeUnit</a>(TimeUnit::FRAMES, rate), 0, 0)
<a name="l00056"></a>00056         , _start_beats(<a class="code" href="classRaul_1_1TimeUnit.html" title="A type of time stamp.">TimeUnit</a>(TimeUnit::BEATS, ppqn), 0, 0)
<a name="l00057"></a>00057         , _length_beats(<a class="code" href="classRaul_1_1TimeUnit.html" title="A type of time stamp.">TimeUnit</a>(TimeUnit::BEATS, ppqn), 0, 0)
<a name="l00058"></a>00058         , _offset_ticks(<a class="code" href="classRaul_1_1TimeUnit.html" title="A type of time stamp.">TimeUnit</a>(TimeUnit::FRAMES, rate), 0, 0)
<a name="l00059"></a>00059     {}
<a name="l00060"></a>00060 
<a name="l00066"></a><a class="code" href="classRaul_1_1TimeSlice.html#ac1d0209d2f40224f150cd3c7d7f5a9ed">00066</a>     <span class="keywordtype">void</span> <a class="code" href="classRaul_1_1TimeSlice.html#ac1d0209d2f40224f150cd3c7d7f5a9ed" title="Set the start and length of the slice.">set_slice</a>(<a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeStamp</a> start, <a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeDuration</a> length) {
<a name="l00067"></a>00067         assert(start.unit() == ticks_unit());
<a name="l00068"></a>00068         assert(length.unit() == ticks_unit());
<a name="l00069"></a>00069         _start_ticks = start;
<a name="l00070"></a>00070         _length_ticks = length;
<a name="l00071"></a>00071         update_beat_time();
<a name="l00072"></a>00072     }
<a name="l00073"></a>00073 
<a name="l00074"></a>00074     <span class="keywordtype">void</span> set_length(<a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeDuration</a> length) {
<a name="l00075"></a>00075         assert(length.unit() == ticks_unit());
<a name="l00076"></a>00076         _length_ticks = length;
<a name="l00077"></a>00077         _length_beats = ticks_to_beats(_length_ticks);
<a name="l00078"></a>00078     }
<a name="l00079"></a>00079 
<a name="l00080"></a>00080     <span class="keywordtype">bool</span> contains(TimeStamp time) {
<a name="l00081"></a>00081         <span class="keywordflow">return</span> (time &gt;= <a class="code" href="classRaul_1_1TimeSlice.html#a33f9ecd79318df0a0c1adbb71de4aae7" title="Start of current sub-cycle in ticks.">start_ticks</a>() &amp;&amp; time &lt; <a class="code" href="classRaul_1_1TimeSlice.html#a33f9ecd79318df0a0c1adbb71de4aae7" title="Start of current sub-cycle in ticks.">start_ticks</a>() + <a class="code" href="classRaul_1_1TimeSlice.html#a59f5a1955b65b5937a3238a9eb872c3b" title="Length of current sub-cycle in ticks.">length_ticks</a>());
<a name="l00082"></a>00082     }
<a name="l00083"></a>00083 
<a name="l00084"></a>00084     <span class="keywordtype">double</span> tick_rate() { <span class="keywordflow">return</span> _tick_rate; }
<a name="l00085"></a>00085     <span class="keywordtype">double</span> beat_rate() { <span class="keywordflow">return</span> _beat_rate; }
<a name="l00086"></a>00086     <span class="keywordtype">double</span> bpm()       { <span class="keywordflow">return</span> 60/_beat_rate; }
<a name="l00087"></a>00087 
<a name="l00088"></a>00088     <span class="keywordtype">void</span> set_tick_rate(<span class="keywordtype">double</span> tick_rate) {
<a name="l00089"></a>00089         _tick_rate = tick_rate;
<a name="l00090"></a>00090         update_beat_time();
<a name="l00091"></a>00091     }
<a name="l00092"></a>00092 
<a name="l00093"></a>00093     <span class="keywordtype">void</span> set_bpm(<span class="keywordtype">double</span> bpm) {
<a name="l00094"></a>00094         _beat_rate = 60.0/bpm;
<a name="l00095"></a>00095         update_beat_time();
<a name="l00096"></a>00096     }
<a name="l00097"></a>00097 
<a name="l00098"></a>00098     <span class="keyword">inline</span> TimeStamp beats_to_seconds(TimeStamp beats)<span class="keyword"> const </span>{
<a name="l00099"></a>00099         <span class="keywordflow">return</span> TimeStamp(real_unit(), beats.to_double() * 1/(double)_beat_rate);
<a name="l00100"></a>00100     }
<a name="l00101"></a>00101 
<a name="l00102"></a>00102     <span class="keyword">inline</span> TimeStamp beats_to_ticks(TimeStamp beats)<span class="keyword"> const </span>{
<a name="l00103"></a>00103         <span class="keywordflow">return</span> TimeStamp(ticks_unit(), beats.to_double() / (double)_beat_rate * _tick_rate);
<a name="l00104"></a>00104     }
<a name="l00105"></a>00105 
<a name="l00106"></a>00106     <span class="keyword">inline</span> TimeStamp ticks_to_seconds(TimeStamp ticks)<span class="keyword"> const </span>{
<a name="l00107"></a>00107         <span class="keywordflow">return</span> TimeStamp(real_unit(), ticks.ticks() * 1/(double)_tick_rate);
<a name="l00108"></a>00108     }
<a name="l00109"></a>00109 
<a name="l00110"></a>00110     <span class="keyword">inline</span> TimeStamp ticks_to_beats(TimeStamp ticks)<span class="keyword"> const </span>{
<a name="l00111"></a>00111         <span class="keywordflow">return</span> TimeStamp(beats_unit(), ticks.ticks() * 1/(double)_tick_rate * _beat_rate);
<a name="l00112"></a>00112     }
<a name="l00113"></a>00113 
<a name="l00115"></a><a class="code" href="classRaul_1_1TimeSlice.html#a33f9ecd79318df0a0c1adbb71de4aae7">00115</a>     <span class="keyword">inline</span> <a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeStamp</a> <a class="code" href="classRaul_1_1TimeSlice.html#a33f9ecd79318df0a0c1adbb71de4aae7" title="Start of current sub-cycle in ticks.">start_ticks</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _start_ticks; }
<a name="l00116"></a>00116 
<a name="l00118"></a><a class="code" href="classRaul_1_1TimeSlice.html#a59f5a1955b65b5937a3238a9eb872c3b">00118</a>     <span class="keyword">inline</span> <a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeDuration</a> <a class="code" href="classRaul_1_1TimeSlice.html#a59f5a1955b65b5937a3238a9eb872c3b" title="Length of current sub-cycle in ticks.">length_ticks</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _length_ticks; }
<a name="l00119"></a>00119 
<a name="l00121"></a><a class="code" href="classRaul_1_1TimeSlice.html#a97521b3954662d7faf6b26db3039a8b0">00121</a>     <span class="keyword">inline</span> <a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeStamp</a> <a class="code" href="classRaul_1_1TimeSlice.html#a97521b3954662d7faf6b26db3039a8b0" title="Start of current sub-cycle in beats.">start_beats</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _start_beats; }
<a name="l00122"></a>00122 
<a name="l00124"></a><a class="code" href="classRaul_1_1TimeSlice.html#a0e3953cc15f6cffe8b10c2fc957aa0fb">00124</a>     <span class="keyword">inline</span> <a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeDuration</a> <a class="code" href="classRaul_1_1TimeSlice.html#a0e3953cc15f6cffe8b10c2fc957aa0fb" title="Length of current sub-cycle in beats.">length_beats</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _length_beats; }
<a name="l00125"></a>00125 
<a name="l00127"></a><a class="code" href="classRaul_1_1TimeSlice.html#a077a893ae8bd829b546b4ded72fed510">00127</a>     <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classRaul_1_1TimeSlice.html#a077a893ae8bd829b546b4ded72fed510" title="Set the offset between real-time and timeslice-time.">set_offset</a>(<a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeDuration</a> offset) { _offset_ticks = offset; }
<a name="l00128"></a>00128 
<a name="l00130"></a><a class="code" href="classRaul_1_1TimeSlice.html#adfd0fac70b35b56d085423178caa7267">00130</a>     <span class="keyword">inline</span> <a class="code" href="classRaul_1_1TimeStamp.html" title="A real-time time stamp (possible units: frame, absolute (s), or beat).">TimeDuration</a> <a class="code" href="classRaul_1_1TimeSlice.html#adfd0fac70b35b56d085423178caa7267" title="Offset relative to external (e.g Jack) time.">offset_ticks</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _offset_ticks; }
<a name="l00131"></a>00131 
<a name="l00132"></a>00132     <span class="keyword">inline</span> <a class="code" href="classRaul_1_1TimeUnit.html" title="A type of time stamp.">TimeUnit</a> beats_unit()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _start_beats.unit(); }
<a name="l00133"></a>00133     <span class="keyword">inline</span> TimeUnit ticks_unit()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _start_ticks.unit(); }
<a name="l00134"></a>00134     <span class="keyword">inline</span> TimeUnit real_unit()<span class="keyword">  const </span>{ <span class="keywordflow">return</span> TimeUnit(TimeUnit::SECONDS, 0); }
<a name="l00135"></a>00135 
<a name="l00136"></a>00136 <span class="keyword">private</span>:
<a name="l00137"></a>00137     <span class="keyword">inline</span> <span class="keywordtype">void</span> update_beat_time() {
<a name="l00138"></a>00138         _start_beats  = ticks_to_beats(_start_ticks);
<a name="l00139"></a>00139         _length_beats = ticks_to_beats(_length_ticks);
<a name="l00140"></a>00140     }
<a name="l00141"></a>00141 
<a name="l00142"></a>00142     <span class="comment">// Rate/Tempo</span>
<a name="l00143"></a>00143     <span class="keywordtype">double</span> _tick_rate; 
<a name="l00144"></a>00144     <span class="keywordtype">double</span> _beat_rate; 
<a name="l00145"></a>00145 
<a name="l00146"></a>00146     <span class="comment">// Current time</span>
<a name="l00147"></a>00147     TimeStamp    _start_ticks;  
<a name="l00148"></a>00148     TimeDuration _length_ticks; 
<a name="l00149"></a>00149     TimeStamp    _start_beats;  
<a name="l00150"></a>00150     TimeDuration _length_beats; 
<a name="l00151"></a>00151 
<a name="l00152"></a>00152     TimeDuration _offset_ticks; 
<a name="l00153"></a>00153 };
<a name="l00154"></a>00154 
<a name="l00155"></a>00155 
<a name="l00156"></a>00156 } <span class="comment">// namespace Raul</span>
<a name="l00157"></a>00157 
<a name="l00158"></a>00158 <span class="preprocessor">#endif // RAUL_TIME_SLICE_HPP</span>
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