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<div class="title">PlaySine.java</div> </div>
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<a href="PlaySine_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> </div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="keyword">package </span>com.portaudio;</div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="keyword">import</span> com.portaudio.TestBasic.SineOscillator;</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a name="l00011"></a><span class="lineno"><a class="code" href="classcom_1_1portaudio_1_1PlaySine.html"> 11</a></span> <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="classcom_1_1portaudio_1_1PlaySine.html">PlaySine</a></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> {</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <span class="keyword">private</span> <span class="keywordtype">void</span> writeSineData( <a class="code" href="classcom_1_1portaudio_1_1BlockingStream.html">BlockingStream</a> stream, <span class="keywordtype">int</span> framesPerBuffer,</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keywordtype">int</span> numFrames, <span class="keywordtype">int</span> sampleRate )</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  {</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="keywordtype">float</span>[] buffer = <span class="keyword">new</span> <span class="keywordtype">float</span>[framesPerBuffer * 2];</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  SineOscillator osc1 = <span class="keyword">new</span> SineOscillator( 200.0, sampleRate );</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  SineOscillator osc2 = <span class="keyword">new</span> SineOscillator( 300.0, sampleRate );</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keywordtype">int</span> framesLeft = numFrames;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">while</span>( framesLeft > 0 )</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  {</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordtype">int</span> index = 0;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordtype">int</span> framesToWrite = (framesLeft > framesPerBuffer) ? framesPerBuffer</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  : framesLeft;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">for</span>( <span class="keywordtype">int</span> j = 0; j < framesToWrite; j++ )</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  {</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  buffer[index++] = (float) osc1.next();</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  buffer[index++] = (float) osc2.next();</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  }</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  stream.<a class="code" href="classcom_1_1portaudio_1_1BlockingStream.html#ab12ce694b065cb1729fff4815345b4a9">write</a>( buffer, framesToWrite );</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  framesLeft -= framesToWrite;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  }</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00045"></a><span class="lineno"><a class="code" href="classcom_1_1portaudio_1_1PlaySine.html#a1d258a45543f29b9b2a27649ba6532ad"> 45</a></span>  <span class="keyword">public</span> <span class="keywordtype">void</span> <a class="code" href="classcom_1_1portaudio_1_1PlaySine.html#a1d258a45543f29b9b2a27649ba6532ad">play</a>()</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="classcom_1_1portaudio_1_1PortAudio.html">PortAudio</a>.<a class="code" href="classcom_1_1portaudio_1_1PortAudio.html#a056b212026d02c19607d81a4faf8a4b0">initialize</a>();</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="comment">// Get the default device and setup the stream parameters.</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">int</span> deviceId = <a class="code" href="classcom_1_1portaudio_1_1PortAudio.html">PortAudio</a>.getDefaultOutputDevice();</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="classcom_1_1portaudio_1_1DeviceInfo.html">DeviceInfo</a> deviceInfo = <a class="code" href="classcom_1_1portaudio_1_1PortAudio.html">PortAudio</a>.getDeviceInfo( deviceId );</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">double</span> sampleRate = deviceInfo.defaultSampleRate;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  System.out.println( <span class="stringliteral">" deviceId = "</span> + deviceId );</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  System.out.println( <span class="stringliteral">" sampleRate = "</span> + sampleRate );</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  System.out.println( <span class="stringliteral">" device name = "</span> + deviceInfo.name );</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <a class="code" href="classcom_1_1portaudio_1_1StreamParameters.html">StreamParameters</a> streamParameters = <span class="keyword">new</span> <a class="code" href="classcom_1_1portaudio_1_1StreamParameters.html">StreamParameters</a>();</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  streamParameters.channelCount = 2;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  streamParameters.device = deviceId;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  streamParameters.suggestedLatency = deviceInfo.defaultLowOutputLatency;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  System.out.println( <span class="stringliteral">" suggestedLatency = "</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  + streamParameters.suggestedLatency );</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">int</span> framesPerBuffer = 256;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordtype">int</span> flags = 0;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// Open a stream for output.</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="classcom_1_1portaudio_1_1BlockingStream.html">BlockingStream</a> stream = <a class="code" href="classcom_1_1portaudio_1_1PortAudio.html">PortAudio</a>.openStream( null, streamParameters,</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  (<span class="keywordtype">int</span>) sampleRate, framesPerBuffer, flags );</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordtype">int</span> numFrames = (int) (sampleRate * 4); <span class="comment">// enough for 4 seconds</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  stream.<a class="code" href="classcom_1_1portaudio_1_1BlockingStream.html#a8acbba9e18de0678780d1209548f9c8d">start</a>();</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  writeSineData( stream, framesPerBuffer, numFrames, (<span class="keywordtype">int</span>) sampleRate );</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  stream.<a class="code" href="classcom_1_1portaudio_1_1BlockingStream.html#a912f5332bc0c5f610ec94bf583a3e2d6">stop</a>();</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  stream.<a class="code" href="classcom_1_1portaudio_1_1BlockingStream.html#a8aa21c90665dbd02b7578ec83aa7bc38">close</a>();</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="classcom_1_1portaudio_1_1PortAudio.html">PortAudio</a>.<a class="code" href="classcom_1_1portaudio_1_1PortAudio.html#a2d20afde68cdc2834850cda643717cfe">terminate</a>();</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  System.out.println( <span class="stringliteral">"JPortAudio test complete."</span> );</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">void</span> main( String[] args )</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="code" href="classcom_1_1portaudio_1_1PlaySine.html">PlaySine</a> player = <span class="keyword">new</span> <a class="code" href="classcom_1_1portaudio_1_1PlaySine.html">PlaySine</a>();</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  player.<a class="code" href="classcom_1_1portaudio_1_1PlaySine.html#a1d258a45543f29b9b2a27649ba6532ad">play</a>();</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> }</div>
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