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<HTML>
<HEAD>
<TITLE>The Synthesis ToolKit in C++ (STK)</TITLE>
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<img src="princeton.gif"> &nbsp; <img src="ccrma.gif"><P>
<a class="qindex" href="index.html">Home</a> &nbsp; <a class="qindex" href="information.html">Information</a> &nbsp; <a class="qindex" href="classes.html">Classes</a> &nbsp; <a class="qindex" href="download.html">Download</a> &nbsp; <a class="qindex" href="usage.html">Usage</a> &nbsp; <a class="qindex" href="maillist.html">Mail List</a> &nbsp; <a class="qindex" href="system.html">Requirements</a> &nbsp; <a class="qindex" href="links.html">Links</a> &nbsp; <a class="qindex" href="tutorial.html">Tutorial</a></CENTER>
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<!-- Generated by Doxygen 1.2.8.1 -->
<h1>RtAudio.h</h1><div class="fragment"><pre>00001 <font class="comment">/************************************************************************/</font>
00038 <font class="comment">/************************************************************************/</font>
00039
00040 <font class="preprocessor">#if !defined(__RTAUDIO_H)</font>
00041 <font class="preprocessor"></font><font class="preprocessor">#define __RTAUDIO_H</font>
00042 <font class="preprocessor"></font>
00043 <font class="preprocessor">#include &lt;map&gt;</font>
00044
00045 <font class="preprocessor">#if defined(__LINUX_ALSA__)</font>
00046 <font class="preprocessor"></font><font class="preprocessor"> #include &lt;alsa/asoundlib.h&gt;</font>
00047 <font class="preprocessor"> #include &lt;pthread.h&gt;</font>
00048 <font class="preprocessor"> #include &lt;unistd.h&gt;</font>
00049
00050 <font class="keyword">typedef</font> snd_pcm_t *AUDIO_HANDLE;
00051 <font class="keyword">typedef</font> <font class="keywordtype">int</font> DEVICE_ID;
00052 <font class="keyword">typedef</font> pthread_t THREAD_HANDLE;
00053 <font class="keyword">typedef</font> pthread_mutex_t MUTEX;
00054
00055 <font class="preprocessor">#elif defined(__LINUX_OSS__)</font>
00056 <font class="preprocessor"></font><font class="preprocessor"> #include &lt;pthread.h&gt;</font>
00057 <font class="preprocessor"> #include &lt;unistd.h&gt;</font>
00058
00059 <font class="keyword">typedef</font> <font class="keywordtype">int</font> AUDIO_HANDLE;
00060 <font class="keyword">typedef</font> <font class="keywordtype">int</font> DEVICE_ID;
00061 <font class="keyword">typedef</font> pthread_t THREAD_HANDLE;
00062 <font class="keyword">typedef</font> pthread_mutex_t MUTEX;
00063
00064 <font class="preprocessor">#elif defined(__WINDOWS_DS__)</font>
00065 <font class="preprocessor"></font><font class="preprocessor"> #include &lt;windows.h&gt;</font>
00066 <font class="preprocessor"> #include &lt;process.h&gt;</font>
00067
00068 <font class="comment">// The following struct is used to hold the extra variables</font>
00069 <font class="comment">// specific to the DirectSound implementation.</font>
00070 <font class="keyword">typedef</font> <font class="keyword">struct </font>{
00071 <font class="keywordtype">void</font> * object;
00072 <font class="keywordtype">void</font> * buffer;
00073 UINT bufferPointer;
00074 } AUDIO_HANDLE;
00075
00076 <font class="keyword">typedef</font> LPGUID DEVICE_ID;
00077 <font class="keyword">typedef</font> <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> THREAD_HANDLE;
00078 <font class="keyword">typedef</font> CRITICAL_SECTION MUTEX;
00079
00080 <font class="preprocessor">#elif defined(__WINDOWS_ASIO__)</font>
00081 <font class="preprocessor"></font><font class="preprocessor"> #include &lt;windows.h&gt;</font>
00082 <font class="preprocessor"> #include &lt;process.h&gt;</font>
00083
00084 <font class="keyword">typedef</font> <font class="keywordtype">int</font> AUDIO_HANDLE;
00085 <font class="keyword">typedef</font> <font class="keywordtype">int</font> DEVICE_ID;
00086 <font class="keyword">typedef</font> <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> THREAD_HANDLE;
00087 <font class="keyword">typedef</font> CRITICAL_SECTION MUTEX;
00088
00089 <font class="preprocessor">#elif defined(__IRIX_AL__)</font>
00090 <font class="preprocessor"></font><font class="preprocessor"> #include &lt;dmedia/audio.h&gt;</font>
00091 <font class="preprocessor"> #include &lt;pthread.h&gt;</font>
00092 <font class="preprocessor"> #include &lt;unistd.h&gt;</font>
00093
00094 <font class="keyword">typedef</font> ALport AUDIO_HANDLE;
00095 <font class="keyword">typedef</font> <font class="keywordtype">long</font> DEVICE_ID;
00096 <font class="keyword">typedef</font> pthread_t THREAD_HANDLE;
00097 <font class="keyword">typedef</font> pthread_mutex_t MUTEX;
00098
00099 <font class="preprocessor">#elif defined(__MACOSX_CORE__)</font>
00100 <font class="preprocessor"></font>
00101 <font class="preprocessor"> #include &lt;CoreAudio/AudioHardware.h&gt;</font>
00102 <font class="preprocessor"> #include &lt;pthread.h&gt;</font>
00103
00104 <font class="keyword">typedef</font> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> AUDIO_HANDLE;
00105 <font class="keyword">typedef</font> AudioDeviceID DEVICE_ID;
00106 <font class="keyword">typedef</font> pthread_t THREAD_HANDLE;
00107 <font class="keyword">typedef</font> pthread_mutex_t MUTEX;
00108
00109 <font class="preprocessor">#endif</font>
00110 <font class="preprocessor"></font>
00111
00112 <font class="comment">/************************************************************************/</font>
00125 <font class="comment">/************************************************************************/</font>
00126
00127 <font class="keyword">class </font><a class="code" href="classRtError.html">RtError</a>
00128 {
00129 <font class="keyword">public</font>:
<a name="l00131"></a><a class="code" href="classRtError.html#s11">00131</a> <font class="keyword">enum</font> TYPE {
00132 WARNING,
00133 DEBUG_WARNING,
00134 UNSPECIFIED,
00135 NO_DEVICES_FOUND,
00136 INVALID_DEVICE,
00137 INVALID_STREAM,
00138 MEMORY_ERROR,
00139 INVALID_PARAMETER,
00140 DRIVER_ERROR,
00141 SYSTEM_ERROR,
00142 THREAD_ERROR
00143 };
00144
00145 <font class="keyword">protected</font>:
00146 <font class="keywordtype">char</font> error_message[256];
00147 TYPE type;
00148
00149 <font class="keyword">public</font>:
00151 <a class="code" href="classRtError.html#a0">RtError</a>(<font class="keyword">const</font> <font class="keywordtype">char</font> *p, TYPE tipe = RtError::UNSPECIFIED);
00152
00154 <font class="keyword">virtual</font> <a class="code" href="classRtError.html#a1">~RtError</a>(<font class="keywordtype">void</font>);
00155
00157 <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="classRtError.html#a2">printMessage</a>(<font class="keywordtype">void</font>);
00158
<a name="l00160"></a><a class="code" href="classRtError.html#a3">00160</a> <font class="keyword">virtual</font> <font class="keyword">const</font> TYPE&amp; <a class="code" href="classRtError.html#a3">getType</a>(<font class="keywordtype">void</font>)<font class="keyword"> </font>{ <font class="keywordflow">return</font> type; }
00161
<a name="l00163"></a><a class="code" href="classRtError.html#a4">00163</a> <font class="keyword">virtual</font> <font class="keyword">const</font> <font class="keywordtype">char</font> *<a class="code" href="classRtError.html#a4">getMessage</a>(<font class="keywordtype">void</font>)<font class="keyword"> </font>{ <font class="keywordflow">return</font> error_message; }
00164 };
00165
00166
00167 <font class="comment">// This public structure type is used to pass callback information</font>
00168 <font class="comment">// between the private RtAudio stream structure and global callback</font>
00169 <font class="comment">// handling functions.</font>
00170 <font class="keyword">typedef</font> <font class="keyword">struct </font>{
00171 <font class="keywordtype">void</font> *object; <font class="comment">// Used as a "this" pointer.</font>
00172 <font class="keywordtype">int</font> streamId;
00173 DEVICE_ID device[2];
00174 THREAD_HANDLE thread;
00175 <font class="keywordtype">void</font> *callback;
00176 <font class="keywordtype">void</font> *buffers;
00177 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> waitTime;
00178 <font class="keywordtype">bool</font> blockTick;
00179 <font class="keywordtype">bool</font> stopStream;
00180 <font class="keywordtype">bool</font> usingCallback;
00181 <font class="keywordtype">void</font> *userData;
00182 } CALLBACK_INFO;
00183
00184
00185 <font class="comment">// *************************************************** //</font>
00186 <font class="comment">//</font>
00187 <font class="comment">// RtAudio class declaration.</font>
00188 <font class="comment">//</font>
00189 <font class="comment">// *************************************************** //</font>
00190
00191 <font class="keyword">class </font><a class="code" href="classRtAudio.html">RtAudio</a>
00192 {
00193 <font class="keyword">public</font>:
00194
00195 <font class="comment">// Support for signed integers and floats. Audio data fed to/from</font>
00196 <font class="comment">// the tickStream() routine is assumed to ALWAYS be in host</font>
00197 <font class="comment">// byte order. The internal routines will automatically take care of</font>
00198 <font class="comment">// any necessary byte-swapping between the host format and the</font>
00199 <font class="comment">// soundcard. Thus, endian-ness is not a concern in the following</font>
00200 <font class="comment">// format definitions.</font>
00201 <font class="keyword">typedef</font> <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> RTAUDIO_FORMAT;
<a name="l00202"></a><a class="code" href="classRtAudio.html#p0">00202</a> <font class="keyword">static</font> <font class="keyword">const</font> RTAUDIO_FORMAT RTAUDIO_SINT8;
<a name="l00203"></a><a class="code" href="classRtAudio.html#p1">00203</a> <font class="keyword">static</font> <font class="keyword">const</font> RTAUDIO_FORMAT RTAUDIO_SINT16;
<a name="l00204"></a><a class="code" href="classRtAudio.html#p2">00204</a> <font class="keyword">static</font> <font class="keyword">const</font> RTAUDIO_FORMAT RTAUDIO_SINT24;
<a name="l00205"></a><a class="code" href="classRtAudio.html#p3">00205</a> <font class="keyword">static</font> <font class="keyword">const</font> RTAUDIO_FORMAT RTAUDIO_SINT32;
<a name="l00206"></a><a class="code" href="classRtAudio.html#p4">00206</a> <font class="keyword">static</font> <font class="keyword">const</font> RTAUDIO_FORMAT RTAUDIO_FLOAT32;
<a name="l00207"></a><a class="code" href="classRtAudio.html#p5">00207</a> <font class="keyword">static</font> <font class="keyword">const</font> RTAUDIO_FORMAT RTAUDIO_FLOAT64;
00209 <font class="comment">//static const int MAX_SAMPLE_RATES = 14;</font>
00210 <font class="keyword">enum</font> { MAX_SAMPLE_RATES = 14 };
00211
00212 <font class="keyword">typedef</font> int (*RTAUDIO_CALLBACK)(<font class="keywordtype">char</font> *buffer, <font class="keywordtype">int</font> bufferSize, <font class="keywordtype">void</font> *userData);
00213
<a name="l00215"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html">00215</a> <font class="keyword">typedef</font> <font class="keyword">struct </font>{
<a name="l00216"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m0">00216</a> <font class="keywordtype">char</font> name[128];
00217 DEVICE_ID id[2]; <font class="comment">/* No value reported by getDeviceInfo(). */</font>
<a name="l00218"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m2">00218</a> <font class="keywordtype">bool</font> probed;
<a name="l00219"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m3">00219</a> <font class="keywordtype">int</font> maxOutputChannels;
<a name="l00220"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m4">00220</a> <font class="keywordtype">int</font> maxInputChannels;
<a name="l00221"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m5">00221</a> <font class="keywordtype">int</font> maxDuplexChannels;
<a name="l00222"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m6">00222</a> <font class="keywordtype">int</font> minOutputChannels;
<a name="l00223"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m7">00223</a> <font class="keywordtype">int</font> minInputChannels;
<a name="l00224"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m8">00224</a> <font class="keywordtype">int</font> minDuplexChannels;
<a name="l00225"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m9">00225</a> <font class="keywordtype">bool</font> hasDuplexSupport;
<a name="l00226"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m10">00226</a> <font class="keywordtype">bool</font> isDefault;
<a name="l00227"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m11">00227</a> <font class="keywordtype">int</font> nSampleRates;
<a name="l00228"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m12">00228</a> <font class="keywordtype">int</font> sampleRates[MAX_SAMPLE_RATES];
<a name="l00229"></a><a class="code" href="structRtAudio_1_1RTAUDIO__DEVICE.html#m13">00229</a> RTAUDIO_FORMAT nativeFormats;
00230 } RTAUDIO_DEVICE;
00231
00233
00239 <a class="code" href="classRtAudio.html#a0">RtAudio</a>();
00240
00242
00253 <a class="code" href="classRtAudio.html#a0">RtAudio</a>(<font class="keywordtype">int</font> *streamId,
00254 <font class="keywordtype">int</font> outputDevice, <font class="keywordtype">int</font> outputChannels,
00255 <font class="keywordtype">int</font> inputDevice, <font class="keywordtype">int</font> inputChannels,
00256 RTAUDIO_FORMAT format, <font class="keywordtype">int</font> sampleRate,
00257 <font class="keywordtype">int</font> *bufferSize, <font class="keywordtype">int</font> numberOfBuffers);
00258
00260
00264 <a class="code" href="classRtAudio.html#a2">~RtAudio</a>();
00265
00267
00294 <font class="keywordtype">int</font> <a class="code" href="classRtAudio.html#a3">openStream</a>(<font class="keywordtype">int</font> outputDevice, <font class="keywordtype">int</font> outputChannels,
00295 <font class="keywordtype">int</font> inputDevice, <font class="keywordtype">int</font> inputChannels,
00296 RTAUDIO_FORMAT format, <font class="keywordtype">int</font> sampleRate,
00297 <font class="keywordtype">int</font> *bufferSize, <font class="keywordtype">int</font> numberOfBuffers);
00298
00300
00319 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a4">setStreamCallback</a>(<font class="keywordtype">int</font> streamId, RTAUDIO_CALLBACK callback, <font class="keywordtype">void</font> *userData);
00320
00322
00329 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a5">cancelStreamCallback</a>(<font class="keywordtype">int</font> streamId);
00330
00332 <font class="keywordtype">int</font> <a class="code" href="classRtAudio.html#a6">getDeviceCount</a>(<font class="keywordtype">void</font>);
00333
00335
00343 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a7">getDeviceInfo</a>(<font class="keywordtype">int</font> device, RTAUDIO_DEVICE *info);
00344
00346
00351 <font class="keywordtype">char</font> * <font class="keyword">const</font> <a class="code" href="classRtAudio.html#a8">getStreamBuffer</a>(<font class="keywordtype">int</font> streamId);
00352
00354
00359 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a9">tickStream</a>(<font class="keywordtype">int</font> streamId);
00360
00362
00366 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a10">closeStream</a>(<font class="keywordtype">int</font> streamId);
00367
00369
00373 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a11">startStream</a>(<font class="keywordtype">int</font> streamId);
00374
00376
00380 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a12">stopStream</a>(<font class="keywordtype">int</font> streamId);
00381
00383
00387 <font class="keywordtype">void</font> <a class="code" href="classRtAudio.html#a13">abortStream</a>(<font class="keywordtype">int</font> streamId);
00388
00390
00395 <font class="keywordtype">int</font> <a class="code" href="classRtAudio.html#a14">streamWillBlock</a>(<font class="keywordtype">int</font> streamId);
00396
00397 <font class="preprocessor">#if (defined(__MACOSX_CORE__) || defined(__WINDOWS_ASIO__))</font>
00398 <font class="preprocessor"></font> <font class="comment">// This function is intended for internal use only. It must be</font>
00399 <font class="comment">// public because it is called by the internal callback handler,</font>
00400 <font class="comment">// which is not a member of RtAudio. External use of this function</font>
00401 <font class="comment">// will most likely produce highly undesireable results!</font>
00402 <font class="keywordtype">void</font> callbackEvent(<font class="keywordtype">int</font> streamId, DEVICE_ID deviceId, <font class="keywordtype">void</font> *inData, <font class="keywordtype">void</font> *outData);
00403 <font class="preprocessor">#endif</font>
00404 <font class="preprocessor"></font>
00405 <font class="keyword">protected</font>:
00406
00407 <font class="keyword">private</font>:
00408
00409 <font class="keyword">static</font> <font class="keyword">const</font> <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> SAMPLE_RATES[MAX_SAMPLE_RATES];
00410
00411 <font class="keyword">enum</font> { FAILURE, SUCCESS };
00412
00413 <font class="keyword">enum</font> STREAM_MODE {
00414 OUTPUT,
00415 INPUT,
00416 DUPLEX,
00417 UNINITIALIZED = -75
00418 };
00419
00420 <font class="keyword">enum</font> STREAM_STATE {
00421 STREAM_STOPPED,
00422 STREAM_RUNNING
00423 };
00424
00425 <font class="keyword">typedef</font> <font class="keyword">struct </font>{
00426 <font class="keywordtype">int</font> device[2]; <font class="comment">// Playback and record, respectively.</font>
00427 STREAM_MODE mode; <font class="comment">// OUTPUT, INPUT, or DUPLEX.</font>
00428 AUDIO_HANDLE handle[2]; <font class="comment">// Playback and record handles, respectively.</font>
00429 STREAM_STATE state; <font class="comment">// STOPPED or RUNNING</font>
00430 <font class="keywordtype">char</font> *userBuffer;
00431 <font class="keywordtype">char</font> *deviceBuffer;
00432 <font class="keywordtype">bool</font> doConvertBuffer[2]; <font class="comment">// Playback and record, respectively.</font>
00433 <font class="keywordtype">bool</font> deInterleave[2]; <font class="comment">// Playback and record, respectively.</font>
00434 <font class="keywordtype">bool</font> doByteSwap[2]; <font class="comment">// Playback and record, respectively.</font>
00435 <font class="keywordtype">int</font> sampleRate;
00436 <font class="keywordtype">int</font> bufferSize;
00437 <font class="keywordtype">int</font> nBuffers;
00438 <font class="keywordtype">int</font> nUserChannels[2]; <font class="comment">// Playback and record, respectively.</font>
00439 <font class="keywordtype">int</font> nDeviceChannels[2]; <font class="comment">// Playback and record channels, respectively.</font>
00440 RTAUDIO_FORMAT userFormat;
00441 RTAUDIO_FORMAT deviceFormat[2]; <font class="comment">// Playback and record, respectively.</font>
00442 MUTEX mutex;
00443 CALLBACK_INFO callbackInfo;
00444 } RTAUDIO_STREAM;
00445
00446 <font class="keyword">typedef</font> <font class="keywordtype">signed</font> <font class="keywordtype">short</font> INT16;
00447 <font class="keyword">typedef</font> <font class="keywordtype">signed</font> <font class="keywordtype">int</font> INT32;
00448 <font class="keyword">typedef</font> <font class="keywordtype">float</font> FLOAT32;
00449 <font class="keyword">typedef</font> <font class="keywordtype">double</font> FLOAT64;
00450
00451 <font class="keywordtype">char</font> message[256];
00452 <font class="keywordtype">int</font> nDevices;
00453 RTAUDIO_DEVICE *devices;
00454
00455 std::map&lt;int, void *&gt; streams;
00456
00458 <font class="keywordtype">void</font> error(RtError::TYPE type);
00459
00464 <font class="keywordtype">void</font> initialize(<font class="keywordtype">void</font>);
00465
00470 <font class="keywordtype">int</font> getDefaultInputDevice(<font class="keywordtype">void</font>);
00471
00476 <font class="keywordtype">int</font> getDefaultOutputDevice(<font class="keywordtype">void</font>);
00477
00479 <font class="keywordtype">void</font> clearDeviceInfo(RTAUDIO_DEVICE *info);
00480
00488 <font class="keywordtype">void</font> probeDeviceInfo(RTAUDIO_DEVICE *info);
00489
00496 <font class="keywordtype">bool</font> probeDeviceOpen(<font class="keywordtype">int</font> device, RTAUDIO_STREAM *stream,
00497 STREAM_MODE mode, <font class="keywordtype">int</font> channels,
00498 <font class="keywordtype">int</font> sampleRate, RTAUDIO_FORMAT format,
00499 <font class="keywordtype">int</font> *bufferSize, <font class="keywordtype">int</font> numberOfBuffers);
00500
00507 <font class="keywordtype">void</font> *verifyStream(<font class="keywordtype">int</font> streamId);
00508
00513 <font class="keywordtype">void</font> convertStreamBuffer(RTAUDIO_STREAM *stream, STREAM_MODE mode);
00514
00516 <font class="keywordtype">void</font> byteSwapBuffer(<font class="keywordtype">char</font> *buffer, <font class="keywordtype">int</font> samples, RTAUDIO_FORMAT format);
00517
00519 <font class="keywordtype">int</font> formatBytes(RTAUDIO_FORMAT format);
00520 };
00521
00522 <font class="comment">// Define the following flag to have extra information spewed to stderr.</font>
00523 <font class="comment">//#define __RTAUDIO_DEBUG__</font>
00524
00525 <font class="preprocessor">#endif</font>
</font></pre></div><HR>
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<tr><td><A HREF="http://www-ccrma.stanford.edu/software/stk/"><I>The Synthesis ToolKit in C++ (STK)</I></A></td></tr>
<tr><td>&copy;1995-2002 Perry R. Cook and Gary P. Scavone. All Rights Reserved.</td></tr>
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