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| author | Gary Scavone <gary@music.mcgill.ca> | 2013-10-11 01:46:50 +0200 |
|---|---|---|
| committer | Stephen Sinclair <sinclair@music.mcgill.ca> | 2013-10-11 01:46:50 +0200 |
| commit | 0876bbd0bad22677b23342c828bc36c3babbed4e (patch) | |
| tree | dbd91a7beefce7da18aa9319df8328945ad66c77 /doc/html/recording.html | |
| parent | 332b0956ae798ea52073fe5b889696a33e0f11f2 (diff) | |
Release 4.0.0 tarball4.0.0
Diffstat (limited to 'doc/html/recording.html')
| -rw-r--r-- | doc/html/recording.html | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/doc/html/recording.html b/doc/html/recording.html new file mode 100644 index 0000000..47c0178 --- /dev/null +++ b/doc/html/recording.html @@ -0,0 +1,76 @@ +<HTML> +<HEAD> +<TITLE>The RtAudio Home Page</TITLE> +<LINK HREF="doxygen.css" REL="stylesheet" TYPE="text/css"> +<LINK REL="SHORTCUT ICON" HREF="http://www.music.mcgill.ca/~gary/favicon.ico"> +</HEAD> +<BODY BGCOLOR="#FFFFFF"> +<CENTER> +<a class="qindex" href="index.html">Home</a> <a class="qindex" href="annotated.html">Class/Enum List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Compound Members</a> </CENTER> +<HR> +<!-- Generated by Doxygen 1.4.4 --> +<h1><a class="anchor" name="recording">Recording</a></h1>Using <a class="el" href="classRtAudio.html">RtAudio</a> for audio input is almost identical to the way it is used for playback. Here's the blocking playback example rewritten for recording:<p> +<div class="fragment"><pre class="fragment"><span class="preprocessor">#include "<a class="code" href="RtAudio_8h.html">RtAudio.h</a>"</span> +<span class="preprocessor">#include <iostream></span> + +<span class="keywordtype">int</span> record( <span class="keywordtype">void</span> *outputBuffer, <span class="keywordtype">void</span> *inputBuffer, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nBufferFrames, + <span class="keywordtype">double</span> streamTime, <a class="code" href="RtAudio_8h.html#a12">RtAudioStreamStatus</a> status, <span class="keywordtype">void</span> *userData ) +{ + <span class="keywordflow">if</span> ( status ) + std::cout << <span class="stringliteral">"Stream overflow detected!"</span> << std::endl; + + <span class="comment">// Do something with the data in the "inputBuffer" buffer.</span> + + <span class="keywordflow">return</span> 0; +} + +<span class="keywordtype">int</span> main() +{ + <a class="code" href="classRtAudio.html">RtAudio</a> adc; + <span class="keywordflow">if</span> ( adc.<a class="code" href="classRtAudio.html#a3">getDeviceCount</a>() < 1 ) { + std::cout << <span class="stringliteral">"\nNo audio devices found!\n"</span>; + exit( 0 ); + } + + <a class="code" href="structRtAudio_1_1StreamParameters.html">RtAudio::StreamParameters</a> parameters; + parameters.<a class="code" href="structRtAudio_1_1StreamParameters.html#o0">deviceId</a> = adc.<a class="code" href="classRtAudio.html#a6">getDefaultInputDevice</a>(); + parameters.<a class="code" href="structRtAudio_1_1StreamParameters.html#o1">nChannels</a> = 2; + parameters.<a class="code" href="structRtAudio_1_1StreamParameters.html#o2">firstChannel</a> = 0; + <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> sampleRate = 44100; + <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bufferFrames = 256; <span class="comment">// 256 sample frames</span> + + <span class="keywordflow">try</span> { + adc.<a class="code" href="classRtAudio.html#a7">openStream</a>( NULL, &parameters, RTAUDIO_SINT16, + sampleRate, &bufferFrames, &record ); + adc.<a class="code" href="classRtAudio.html#a9">startStream</a>(); + } + <span class="keywordflow">catch</span> ( <a class="code" href="classRtError.html">RtError</a>& e ) { + e.<a class="code" href="classRtError.html#a2">printMessage</a>(); + exit( 0 ); + } + + <span class="keywordtype">char</span> input; + std::cout << <span class="stringliteral">"\nRecording ... press <enter> to quit.\n"</span>; + std::cin.get( input ); + + <span class="keywordflow">try</span> { + <span class="comment">// Stop the stream</span> + adc.<a class="code" href="classRtAudio.html#a10">stopStream</a>(); + } + <span class="keywordflow">catch</span> (<a class="code" href="classRtError.html">RtError</a>& e) { + e.<a class="code" href="classRtError.html#a2">printMessage</a>(); + } + + <span class="keywordflow">if</span> ( adc.<a class="code" href="classRtAudio.html#a12">isStreamOpen</a>() ) adc.<a class="code" href="classRtAudio.html#a8">closeStream</a>(); + + <span class="keywordflow">return</span> 0; +} +</pre></div><p> +In this example, we pass the address of the stream parameter structure as the second argument of the <a class="el" href="classRtAudio.html#a7">RtAudio::openStream()</a> function and pass a NULL value for the output stream parameters. In this example, the <em>record()</em> callback function performs no specific operations. <HR> + +<table><tr><td><img src="../images/mcgill.gif" width=165></td> + <td>©2001-2007 Gary P. Scavone, McGill University. All Rights Reserved.<br>Maintained by <a href="http://www.music.mcgill.ca/~gary/">Gary P. Scavone</a>.</td></tr> +</table> + +</BODY> +</HTML> |