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<div id="projectname">PortAudio
 <span id="projectnumber">2.0</span>
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<div class="title">JPortAudio Java Binding </div> </div>
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<div class="textblock"><p><em>Note: this page has not been reviewed, and may contain errors.</em></p>
<h1><a class="anchor" id="java_draft"></a>
DRAFT - IN PROGRESS</h1>
<p>9/4/12 JPortAudio is very new and should be considered an "alpha" release. The building of JPortAudio will eventually be integrated into the Makefile as an optional build.</p>
<p>Currently JPortAudio is only supported for Windows and Macintosh. Please contact us if you want to help with porting Linux.</p>
<p>For reference documentation of the JPortAudio API see: <a class="el" href="classcom_1_1portaudio_1_1PortAudio.html">com.portaudio.PortAudio</a></p>
<p>For an example see: <a class="el" href="PlaySine_8java.html" title="Example that shows how to play sine waves using JPortAudio.">PlaySine.java</a></p>
<h1><a class="anchor" id="java_comp_windows"></a>
Building JPortAudio on Windows</h1>
<p>Build the Java code using the Eclipse project in "jportaudio". Export as "jportaudio.jar".</p>
<p>If you modify the JNI API then you will need to regenerate the JNI .h files using:</p>
<div class="fragment"><div class="line">cd bindings/java/scripts</div>
<div class="line">make_header.bat</div>
</div><!-- fragment --><p>Build the JNI DLL using the Visual Studio 2010 solution in "java/c/build/vs2010/PortAudioJNI".</p>
<h1><a class="anchor" id="java_use_windows"></a>
Using JPortAudio on Windows</h1>
<p>Put the "jportaudio.jar" in the classpath for your application. Place the following libraries where they can be found, typically in the same folder as your application.</p>
<ul>
<li>portaudio_x86.dll</li>
<li>portaudio_x64.dll</li>
<li>jportaudio_x86.dll</li>
<li>jportaudio_x64.dll</li>
</ul>
<h1><a class="anchor" id="java_comp_max"></a>
Building JPortAudio on Mac</h1>
<p>These are notes from building JPortAudio on a Mac with 10.6.8 and XCode 4.</p>
<p>I created a target of type 'C' library.</p>
<p>I added the regular PortAudio frameworks plus the JavaVM framework.</p>
<p>I modified <a class="el" href="com__portaudio__PortAudio_8h_source.html">com_portaudio_PortAudio.h</a> and <a class="el" href="com__portaudio__BlockingStream_8h_source.html">com_portaudio_BlockingStream.h</a> so that jni.h could found.</p>
<div class="fragment"><div class="line"><span class="preprocessor">#if defined(__APPLE__)</span></div>
<div class="line"><span class="preprocessor"></span><span class="preprocessor">#include <JavaVM/jni.h></span></div>
<div class="line"><span class="preprocessor">#else</span></div>
<div class="line"><span class="preprocessor"></span><span class="preprocessor">#include <jni.h></span></div>
<div class="line"><span class="preprocessor">#endif</span></div>
</div><!-- fragment --><p>This is bad because those header files are autogenerated and will be overwritten. We need a better solution for this.</p>
<p>I had trouble finding the "libjportaudio.jnilib". So I added a Build Phase that copied the library to "/Users/phil/Library/Java/Extensions".</p>
<p>On the Mac we can create a universal library for both 32 and 64-bit JVMs. So in the JAR file I will open "jportaudio" on Apple. ON WIndows I will continue to open "jportaudio_x64" and "jportaudio_x86". </p>
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