Check in of new version 4.0.0 distribution (GS).

17 years ago · b0080e69d6
--- a/Makefile.in
+++ b/Makefile.in
@@ -0,0 +1,43 @@
 ### RtAudio library Makefile

 RM = /bin/rm

 OBJECTS	= RtAudio.o

 LIBRARY  = librtaudio.a

 CC       = @CXX@
 AR       = @AR@
 RANLIB   = @RANLIB@

 DEFS     = @debug@
 DEFS    += @audio_apis@
 CFLAGS   = @cflags@
 CFLAGS  += @warn@

 all : $(LIBRARY)

 tests:
 	cd tests && $(MAKE) all

 $(LIBRARY): $(OBJECTS)
 	$(AR) ruv $(LIBRARY) $(OBJECTS)
 	ranlib $(LIBRARY)

 %.o : %.cpp
 	$(CC) $(CFLAGS) $(DEFS) -c $(<) -o $@

 clean : 
 	-rm -f $(LIBRARY)
 	-rm -f $(OBJECTS)
 	-rm -f *~
 	cd tests && $(MAKE) clean

 distclean: clean
 	-rm -rf config.log autom4te.cache Makefile rtaudio-config
 	cd tests && $(MAKE) distclean

 strip : 
 	strip $(LIBRARY)
 	ranlib $(LIBRARY)
 	cd tests && $(MAKE) strip
--- a/RtAudio.cpp
+++ b/RtAudio.cpp
--- a/RtAudio.h
+++ b/RtAudio.h
--- a/RtError.h
+++ b/RtError.h
@@ -12,49 +12,47 @@
 #ifndef RTERROR_H
 #define RTERROR_H

 #include <exception>
 #include <iostream>
 #include <string>

 class RtError
 class RtError : public std::exception
 {
 public:
 public:
  //! Defined RtError types.
  enum Type {
    WARNING,           /*!< A non-critical error. */
    DEBUG_WARNING,     /*!< A non-critical error which might be useful for debugging. */
    UNSPECIFIED,       /*!< The default, unspecified error type. */
    NO_DEVICES_FOUND,  /*!< No devices found on system. */
    INVALID_DEVICE,    /*!< An invalid device ID was specified. */
    INVALID_STREAM,    /*!< An invalid stream ID was specified. */
    MEMORY_ERROR,      /*!< An error occured during memory allocation. */
    INVALID_PARAMETER, /*!< An invalid parameter was specified to a function. */
    INVALID_USE,       /*!< The function was called incorrectly. */
    DRIVER_ERROR,      /*!< A system driver error occured. */
    SYSTEM_ERROR,      /*!< A system error occured. */
    THREAD_ERROR       /*!< A thread error occured. */
  };

 protected:
  std::string message_;
  Type type_;

 public:
  //! The constructor.
  RtError(const std::string& message, Type type = RtError::UNSPECIFIED) : message_(message), type_(type) {}

  RtError( const std::string& message, Type type = RtError::UNSPECIFIED ) throw() : message_(message), type_(type) {}
 
  //! The destructor.
  virtual ~RtError(void) {};
  virtual ~RtError( void ) throw() {}

  //! Prints thrown error message to stderr.
  virtual void printMessage(void) { std::cerr << '\n' << message_ << "\n\n"; }
  virtual void printMessage( void ) throw() { std::cerr << '\n' << message_ << "\n\n"; }

  //! Returns the thrown error message type.
  virtual const Type& getType(void) { return type_; }
  virtual const Type& getType(void) throw() { return type_; }

  //! Returns the thrown error message string.
  virtual const std::string& getMessage(void) { return message_; }
  virtual const std::string& getMessage(void) throw() { return message_; }

  //! Returns the thrown error message as a C string.
  virtual const char *getMessageString(void) { return message_.c_str(); }
  //! Returns the thrown error message as a c-style string.
  virtual const char* what( void ) const throw() { return message_.c_str(); }

 protected:
  std::string message_;
  Type type_;
 };

 #endif
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 # Process this file with autoconf to produce a configure script.
 AC_INIT(RtAudio, 3.0, gary@ccrma.stanford.edu, rtaudio)
 AC_INIT(RtAudio, 4.0, gary@music.mcgill.ca, rtaudio)
 AC_CONFIG_SRCDIR(RtAudio.cpp)
 AC_CONFIG_FILES(tests/Makefile)
 AC_CONFIG_FILES([rtaudio-config Makefile tests/Makefile])

 # Fill GXX with something before test.
 AC_SUBST( GXX, ["no"] )
@@ -9,10 +9,17 @@ AC_SUBST( GXX, ["no"] )
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_CXX(g++ CC c++ cxx)
 AC_PROG_RANLIB
 AC_PATH_PROG(AR, ar, no)
 if [[ $AR = "no" ]] ; then
    AC_MSG_ERROR("Could not find ar - needed to create a library");
 fi

 # Checks for libraries.
 AC_CHECK_LIB(pthread, pthread_create, , AC_MSG_ERROR(RtAudio requires the pthread library!))



 # Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS(sys/ioctl.h unistd.h)
@@ -27,6 +34,9 @@ AC_ARG_ENABLE(debug,
  [AC_SUBST( debug, [-D__RTAUDIO_DEBUG__] ) AC_SUBST( cflags, [-g] ) AC_SUBST( object_path, [Debug] ) AC_MSG_RESULT(yes)],
  [AC_SUBST( debug, [] ) AC_SUBST( cflags, [-O2] ) AC_SUBST( object_path, [Release] ) AC_MSG_RESULT(no)])

 # Checks for functions
 AC_CHECK_FUNC(gettimeofday, [cflags=$cflags" -DHAVE_GETTIMEOFDAY"], )

 # Check compiler and use -Wall if gnu.
 if [test $GXX = "yes" ;] then
  AC_SUBST( warn, [-Wall] )
@@ -36,15 +46,22 @@ fi
 AC_CANONICAL_HOST
 AC_MSG_CHECKING(for audio API)
 case $host in
  *-*-netbsd*)
    AC_SUBST( sound_api, [-D__LINUX_OSS__] )
    AC_MSG_RESULT(using OSS)
    AC_SUBST( audio_apis, [-D__LINUX_OSS__] )
    cflags=$cflags" -lossaudio"
  ;;

  *-*-linux*)
  AC_SUBST( sound_api, [_NO_API_] )
  AC_ARG_WITH(jack, [  --with-jack = choose JACK server support (linux only)], [AC_SUBST( sound_api, [-D__LINUX_JACK__] ) AC_MSG_RESULT(using JACK)], )
  if [test $sound_api = -D__LINUX_JACK__;] then
  AC_ARG_WITH(jack, [  --with-jack = choose JACK server support (mac and linux only)], [AC_SUBST( sound_api, [-D__UNIX_JACK__] ) AC_MSG_RESULT(using JACK)], )
  if [test $sound_api = -D__UNIX_JACK__;] then
    TEMP_LIBS=$LIBS
    AC_CHECK_LIB(jack, jack_client_new, , AC_MSG_ERROR(JACK support requires the jack library!))
    AC_CHECK_LIB(asound, snd_pcm_open, , AC_MSG_ERROR(Jack support also requires the asound library!))
    LIBS="`pkg-config --cflags --libs jack` $TEMP_LIBS -lasound"
    audio_apis="-D__LINUX_JACK__"
    audio_apis="-D__UNIX_JACK__"
  fi

  # Look for Alsa flag
@@ -75,11 +92,30 @@ case $host in
  ;;

  *-apple*)
  # Check for CoreAudio framework
  AC_CHECK_HEADER(CoreAudio/CoreAudio.h,
    [AC_SUBST( audio_apis, [-D__MACOSX_CORE__] )],
    [AC_MSG_ERROR(CoreAudio header files not found!)] )
  AC_SUBST( frameworks, ["-framework CoreAudio"] )
  AC_SUBST( sound_api, [_NO_API_] )
  AC_ARG_WITH(jack, [  --with-jack = choose JACK server support (unix only)], [AC_SUBST( sound_api, [-D__UNIX_JACK__] ) AC_MSG_RESULT(using JACK)], )
  if [test $sound_api = -D__UNIX_JACK__;] then
    AC_CHECK_LIB(jack, jack_client_new, , AC_MSG_ERROR(JACK support requires the jack library!))
    audio_apis="-D__UNIX_JACK__"
  fi

  # Look for Core flag
  AC_ARG_WITH(core, [  --with-core = choose CoreAudio API support (mac only)], [AC_SUBST( sound_api, [-D__MACOSX_CORE__] ) AC_MSG_RESULT(using CoreAudio)], )
  if test $sound_api = -D__MACOSX_CORE__; then
    AC_CHECK_HEADER(CoreAudio/CoreAudio.h, [], [AC_MSG_ERROR(CoreAudio header files not found!)] )
    AC_SUBST( frameworks, ["-framework CoreAudio -framework CoreFoundation"] )
    audio_apis="-D__MACOSX_CORE__ $audio_apis"
  fi

  # If no audio api flags specified, use CoreAudio
  if [test $sound_api = _NO_API_;] then
    AC_SUBST( sound_api, [-D__MACOSX_CORE__] )
    AC_MSG_RESULT(using CoreAudio)
    AC_CHECK_HEADER(CoreAudio/CoreAudio.h,
      [AC_SUBST( audio_apis, [-D__MACOSX_CORE__] )],
      [AC_MSG_ERROR(CoreAudio header files not found!)] )
    AC_SUBST( frameworks, ["-framework CoreAudio -framework CoreFoundation"] )
  fi
  ;;

  *)
@@ -92,3 +128,5 @@ esac
 AC_PROG_GCC_TRADITIONAL

 AC_OUTPUT

 chmod oug+x rtaudio-config
--- a/doc/doxygen/Doxyfile
+++ b/doc/doxygen/Doxyfile
--- a/doc/doxygen/acknowledge.txt
+++ b/doc/doxygen/acknowledge.txt
@@ -0,0 +1,15 @@
 /*! \page acknowledge Acknowledgements

 Many thanks to the following people for providing bug fixes and improvements:
 <UL>
 <LI>Robin Davies (Windows DS and ASIO)</LI>
 <LI>Ryan Williams (Windows non-MS compiler ASIO support)</LI>
 <LI>Ed Wildgoose (Linux ALSA and Jack)</LI>
 <LI>Dominic Mazzoni</LI>
 </UL>

 The RtAudio API incorporates many of the concepts developed in the <A href="http://www.portaudio.com/">PortAudio</A> project by Phil Burk and Ross Bencina.  Early development also incorporated ideas from Bill Schottstaedt's <A href="http://www-ccrma.stanford.edu/software/snd/sndlib/">sndlib</A>.  The CCRMA <A href="http://www-ccrma.stanford.edu/groups/soundwire/">SoundWire group</A> provided valuable feedback during the API proposal stages.

 The early 2.0 version of RtAudio was slowly developed over the course of many months while in residence at the <A href="http://www.iua.upf.es/">Institut Universitari de L'Audiovisual (IUA)</A> in Barcelona, Spain and the <A href="http://www.acoustics.hut.fi/">Laboratory of Acoustics and Audio Signal Processing</A> at the Helsinki University of Technology, Finland.  Much subsequent development happened while working at the <A href="http://www-ccrma.stanford.edu/">Center for Computer Research in Music and Acoustics (CCRMA)</A> at <A href="http://www.stanford.edu/">Stanford University</A>.  All recent versions of RtAudio have been completed while working as an assistant professor of <a href="http://www.music.mcgill.ca/musictech/">Music Technology</a> at <a href="http://www.mcgill.ca/">McGill University</a>.  This work was supported in part by the United States Air Force Office of Scientific Research (grant \#F49620-99-1-0293).

 */
--- a/doc/doxygen/apinotes.txt
+++ b/doc/doxygen/apinotes.txt
@@ -0,0 +1,37 @@
 /*! \page apinotes API Notes

 RtAudio is designed to provide a common API across the various supported operating systems and audio libraries.  Despite that, some issues should be mentioned with regard to each.

 \section linux Linux:

 RtAudio for Linux was developed under Redhat distributions 7.0 - Fedora.  Three different audio APIs are supported on Linux platforms: <A href="http://www.opensound.com/oss.html">OSS</A> (versions >= 4.0), <A href="http://www.alsa-project.org/">ALSA</A>, and <A href="http://jackit.sourceforge.net/">Jack</A>.  Note that RtAudio now only supports the newer version 4.0 OSS API.  The ALSA API is now part of the Linux kernel and offers significantly better functionality than the OSS API.  RtAudio provides support for the 1.0 and higher versions of ALSA.  Jack is a low-latency audio server written primarily for the GNU/Linux operating system. It can connect a number of different applications to an audio device, as well as allow them to share audio between themselves.  Input/output latency on the order of 15 milliseconds can typically be achieved using any of the Linux APIs by fine-tuning the RtAudio buffer parameters (without kernel modifications).  Latencies on the order of 5 milliseconds or less can be achieved using a low-latency kernel patch and increasing FIFO scheduling priority.  The pthread library, which is used for callback functionality, is a standard component of all Linux distributions.

 The ALSA library includes OSS emulation support.  That means that you can run programs compiled for the OSS API even when using the ALSA drivers and library.  It should be noted however that OSS emulation under ALSA is not perfect.  Specifically, channel number queries seem to consistently produce invalid results.  While OSS emulation is successful for the majority of RtAudio tests, it is recommended that the native ALSA implementation of RtAudio be used on systems which have ALSA drivers installed.

 The ALSA implementation of RtAudio makes no use of the ALSA "plug" interface.  All necessary data format conversions, channel compensation, de-interleaving, and byte-swapping is handled by internal RtAudio routines.

 At the moment, only one RtAudio instance can be connected to the Jack server.

 \section macosx Macintosh OS-X (CoreAudio and Jack):

 The Apple CoreAudio API is designed to use a separate callback procedure for each of its audio devices.  A single RtAudio duplex stream using two different devices is supported, though it cannot be guaranteed to always behave correctly because we cannot synchronize these two callbacks.  The <I>numberOfBuffers</I> parameter to the RtAudio::openStream() function has no affect in this implementation.

 It is not possible to have multiple instances of RtAudio accessing the same CoreAudio device.

 The RtAudio Jack support can be compiled on Macintosh OS-X systems, as well as in Linux.

 \section windowsds Windows (DirectSound):

 In order to compile RtAudio under Windows for the DirectSound API, you must have the header and source files for DirectSound version 5.0 or higher.  As far as I know, there is no DirectSoundCapture support for Windows NT.  Audio output latency with DirectSound can be reasonably good, especially since RtAudio version 3.0.2.  Input audio latency still tends to be bad but better since version 3.0.2.  RtAudio was originally developed with Visual C++ version 6.0 but has been tested with .NET.

 The DirectSound version of RtAudio can be compiled with or without the UNICODE preprocessor definition.

 \section windowsasio Windows (ASIO):

 The Steinberg ASIO audio API allows only a single device driver to be loaded and accessed at a time.  ASIO device drivers must be supplied by audio hardware manufacturers, though ASIO emulation is possible on top of systems with DirectSound drivers.  The <I>numberOfBuffers</I> parameter to the RtAudio::openStream() function has no affect in this implementation.

 A number of ASIO source and header files are required for use with RtAudio.  Specifically, an RtAudio project must include the following files: <TT>asio.h,cpp; asiodrivers.h,cpp; asiolist.h,cpp; asiodrvr.h; asiosys.h; ginclude.h; iasiodrv.h; iasiothiscallresolver.h,cpp</TT>.  The Visual C++ projects found in <TT>/tests/Windows/</TT> compile both ASIO and DirectSound support.

 The Steinberg provided <TT>asiolist</TT> class does not compile when the preprocessor definition UNICODE is defined.  Note that this could be an issue when using RtAudio with Qt, though Qt programs appear to compile without the UNICODE definition (try <tt>DEFINES -= UNICODE</tt> in your .pro file).  RtAudio with ASIO support has been tested using the MinGW compiler under Windows XP, as well as in the Visual Studio environment.

 */
--- a/doc/doxygen/compiling.txt
+++ b/doc/doxygen/compiling.txt
@@ -0,0 +1,76 @@
 /*! \page compiling Debugging & Compiling

 \section debug Debugging

 If you are having problems getting RtAudio to run on your system, make sure to pass a value of \e true to the RtAudio::showWarnings() function (this is the default setting).  A variety of warning messages will be displayed which may help in determining the problem.  Also, try using the programs included in the <tt>tests</tt> directory.  The program <tt>probe</tt> displays the queried capabilities of all hardware devices found for all APIs compiled.  When using the ALSA API, further information can be displayed by defining the preprocessor definition __RTAUDIO_DEBUG__.

 \section compile Compiling

 In order to compile RtAudio for a specific OS and audio API, it is necessary to supply the appropriate preprocessor definition and library within the compiler statement:
 <P>

 <TABLE BORDER=2 COLS=5 WIDTH="100%">
 <TR BGCOLOR="beige">
  <TD WIDTH="5%"><B>OS:</B></TD>
  <TD WIDTH="5%"><B>Audio API:</B></TD>
  <TD WIDTH="5%"><B>C++ Class:</B></TD>
  <TD WIDTH="5%"><B>Preprocessor Definition:</B></TD>
  <TD WIDTH="5%"><B>Library or Framework:</B></TD>
  <TD><B>Example Compiler Statement:</B></TD>
 </TR>
 <TR>
  <TD>Linux</TD>
  <TD>ALSA</TD>
  <TD>RtApiAlsa</TD>
  <TD>__LINUX_ALSA__</TD>
  <TD><TT>asound, pthread</TT></TD>
  <TD><TT>g++ -Wall -D__LINUX_ALSA__ -o probe probe.cpp RtAudio.cpp -lasound -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Linux</TD>
  <TD>OSS</TD>
  <TD>RtApiOss</TD>
  <TD>__LINUX_OSS__</TD>
  <TD><TT>pthread</TT></TD>
  <TD><TT>g++ -Wall -D__LINUX_OSS__ -o probe probe.cpp RtAudio.cpp -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Linux or Macintosh OS-X</TD>
  <TD>Jack Audio Server</TD>
  <TD>RtApiJack</TD>
  <TD>__UNIX_JACK__</TD>
  <TD><TT>jack, pthread</TT></TD>
  <TD><TT>g++ -Wall -D__UNIX_JACK__ -o probe probe.cpp RtAudio.cpp `pkg-config --cflags --libs jack` -lpthread</TT></TD>
 </TR>

 <TR>
  <TD>Macintosh OS-X</TD>
  <TD>CoreAudio</TD>
  <TD>RtApiCore</TD>
  <TD>__MACOSX_CORE__</TD>
  <TD><TT>pthread, CoreAudio</TT></TD>
  <TD><TT>g++ -Wall -D__MACOSX_CORE__ -o probe probe.cpp RtAudio.cpp -framework CoreAudio -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Windows</TD>
  <TD>Direct Sound</TD>
  <TD>RtApiDs</TD>
  <TD>__WINDOWS_DS__</TD>
  <TD><TT>dsound.lib (ver. 5.0 or higher), multithreaded</TT></TD>
  <TD><I>compiler specific</I></TD>
 </TR>
 <TR>
  <TD>Windows</TD>
  <TD>ASIO</TD>
  <TD>RtApiAsio</TD>
  <TD>__WINDOWS_ASIO__</TD>
  <TD><I>various ASIO header and source files</I></TD>
  <TD><I>compiler specific</I></TD>
 </TR>
 </TABLE>
 <P>

 The example compiler statements above could be used to compile the <TT>probe.cpp</TT> example file, assuming that <TT>probe.cpp</TT>, <TT>RtAudio.h</TT>, <tt>RtError.h</tt>, and <TT>RtAudio.cpp</TT> all exist in the same directory.


 */
--- a/doc/doxygen/duplex.txt
+++ b/doc/doxygen/duplex.txt
@@ -0,0 +1,74 @@
 /*! \page duplex Duplex Mode

 Finally, it is easy to use RtAudio for simultaneous audio input/output, or duplex operation.  In this example, we simply pass the input data back to the output.

 \code
 #include "RtAudio.h"
 #include <iostream>

 // Pass-through function.
 int inout( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,
           double streamTime, RtAudioStreamStatus status, void *data )
 {
  // Since the number of input and output channels is equal, we can do
  // a simple buffer copy operation here.
  if ( status ) std::cout << "Stream over/underflow detected." << std::endl;

  unsigned long *bytes = (unsigned long *) data;
  memcpy( outputBuffer, inputBuffer, *bytes );
  return 0;
 }

 int main()
 {
 RtAudio adac;
  if ( adac.getDeviceCount() < 1 ) {
    std::cout << "\nNo audio devices found!\n";
    exit( 0 );
  }

  // Set the same number of channels for both input and output.
  unsigned int bufferBytes, bufferFrames = 512;
  RtAudio::StreamParameters iParams, oParams;
  iParams.deviceId = 0; // first available device
  iParams.nChannels = 2;
  oParams.deviceId = 0; // first available device
  oParams.nChannels = 2;

  try {
    adac.openStream( &oParams, &iParams, RTAUDIO_SINT32, 44100, &bufferFrames, &inout, (void *)&bufferBytes );
  }
  catch ( RtError& e ) {
    e.printMessage();
    exit( 0 );
  }

  bufferBytes = bufferFrames * 2 * 4;

  try {
    adac.startStream();

    char input;
    std::cout << "\nRunning ... press <enter> to quit.\n";
    std::cin.get(input);

    // Stop the stream.
    adac.stopStream();
  }
  catch ( RtError& e ) {
    e.printMessage();
    goto cleanup;
  }

 cleanup:
  if ( adac.isStreamOpen() ) adac.closeStream();

  return 0;
 }
 \endcode

 In this example, audio recorded by the stream input will be played out during the next round of audio processing.

 Note that a duplex stream can make use of two different devices (except when using the Linux Jack and Windows ASIO APIs).  However, this may cause timing problems due to possible device clock variations, unless a common external "sync" is provided.

 */
--- a/doc/doxygen/error.txt
+++ b/doc/doxygen/error.txt
@@ -0,0 +1,5 @@
 /*! \page errors Error Handling

 RtAudio makes restrained use of C++ exceptions.  That is, exceptions are thrown only when system errors occur that prevent further class operation or when the user makes invalid function calls.  In other cases, a warning message may be displayed and an appropriate value is returned.  For example, if a system error occurs when processing the RtAudio::getDeviceCount() function, the return value is zero.  In such a case, the user cannot expect to make use of most other RtAudio functions because no devices are available (and thus a stream cannot be opened).  A client can call the function RtAudio::showWarnings() with a boolean argument to enable or disable the printing of warning messages to <tt>stderr</tt>.  By default, warning messages are displayed.  There is a protected RtAudio method, error(), that can be modified to globally control how these messages are handled and reported.

 */
--- a/doc/doxygen/footer.html
+++ b/doc/doxygen/footer.html
@@ -1,8 +1,7 @@
 <HR>

 <table><tr><td><img src="../images/mcgill.gif" width=165></td>
  <td>&copy;2001-2005 Gary P. Scavone, McGill University. All Rights Reserved.<br>
  Maintained by Gary P. Scavone, <a href="mailto:gary@music.mcgill.ca">gary@music.mcgill.ca</a></td></tr>
  <td>&copy;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>
--- a/doc/doxygen/header.html
+++ b/doc/doxygen/header.html
@@ -1,9 +1,10 @@
 <HTML>
 <HEAD>
 <TITLE>The RtAudio Tutorial</TITLE>
 <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">Tutorial</a> &nbsp; <a class="qindex" href="annotated.html">Class/Enum List</a> &nbsp; <a class="qindex" href="files.html">File List</a> &nbsp; <a class="qindex" href="functions.html">Compound Members</a> &nbsp; </CENTER>
 <a class="qindex" href="index.html">Home</a> &nbsp; <a class="qindex" href="annotated.html">Class/Enum List</a> &nbsp; <a class="qindex" href="files.html">File List</a> &nbsp; <a class="qindex" href="functions.html">Compound Members</a> &nbsp; </CENTER>
 <HR>
--- a/doc/doxygen/license.txt
+++ b/doc/doxygen/license.txt
@@ -0,0 +1,30 @@
 /*! \page license License

    RtAudio: a set of realtime audio i/o C++ classes<BR>
    Copyright (c) 2001-2007 Gary P. Scavone

    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation files
    (the "Software"), to deal in the Software without restriction,
    including without limitation the rights to use, copy, modify, merge,
    publish, distribute, sublicense, and/or sell copies of the Software,
    and to permit persons to whom the Software is furnished to do so,
    subject to the following conditions:

    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.

    Any person wishing to distribute modifications to the Software is
    asked to send the modifications to the original developer so that
    they can be incorporated into the canonical version.  This is,
    however, not a binding provision of this license.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
    ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */
--- a/doc/doxygen/multi.txt
+++ b/doc/doxygen/multi.txt
@@ -0,0 +1,7 @@
 /*! \page multi Using Simultaneous Multiple APIs

 Because support for each audio API is encapsulated in a specific RtApi subclass, it is possible to compile and instantiate multiple API-specific subclasses on a given operating system.  For example, one can compile both the RtApiDs and RtApiAsio classes on Windows operating systems by providing the appropriate preprocessor definitions, include files, and libraries for each.  In a run-time situation, one might first attempt to determine whether any ASIO device drivers exist.  This can be done by specifying the api argument RtAudio::WINDOWS_ASIO when attempting to create an instance of RtAudio.  If no available devices are found, then an instance of RtAudio with the api argument RtAudio::WINDOWS_DS can be created.  Alternately, if no api argument is specified, RtAudio will first look for an ASIO instance and then a DirectSound instance (on Linux systems, the default API search order is Jack, Alsa, and finally OSS).  In theory, it should also be possible to have separate instances of RtAudio open at the same time with different underlying audio API support, though this has not been tested.  It is difficult to know how well different audio APIs can simultaneously coexist on a given operating system.  In particular, it is unlikely that the same device could be simultaneously controlled with two different audio APIs.

 The static function RtAudio::getCompiledApi() is provided to determine the available compiled API support.  The function RtAudio::getCurrentApi() indicates the API selected for a given RtAudio instance.

 */
--- a/doc/doxygen/playback.txt
+++ b/doc/doxygen/playback.txt
@@ -0,0 +1,81 @@
 /*! \page playback Playback

 In this example, we provide a complete program that demonstrates the use of RtAudio for audio playback.  Our program produces a two-channel sawtooth waveform for output.

 \code
 #include "RtAudio.h"
 #include <iostream>

 // Two-channel sawtooth wave generator.
 int saw( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,
         double streamTime, RtAudioStreamStatus status, void *userData )
 {
  unsigned int i, j;
  double *buffer = (double *) outputBuffer;
  double *lastValues = (double *) userData;

  if ( status )
    std::cout << "Stream underflow detected!" << std::endl;

  // Write interleaved audio data.
  for ( i=0; i<nBufferFrames; i++ ) {
    for ( j=0; j<2; j++ ) {
      *buffer++ = lastValues[j];

      lastValues[j] += 0.005 * (j+1+(j*0.1));
      if ( lastValues[j] >= 1.0 ) lastValues[j] -= 2.0;
    }
  }

  return 0;
 }

 int main()
 {
  RtAudio dac;
  if ( dac.getDeviceCount() < 1 ) {
    std::cout << "\nNo audio devices found!\n";
    exit( 0 );
  }

  RtAudio::StreamParameters parameters;
  parameters.deviceId = dac.getDefaultOutputDevice();
  parameters.nChannels = 2;
  parameters.firstChannel = 0;
  unsigned int sampleRate = 44100;
  unsigned int bufferFrames = 256; // 256 sample frames
  double data[2];

  try {
    dac.openStream( &parameters, NULL, RTAUDIO_FLOAT64,
                    sampleRate, &bufferFrames, &saw, (void *)&data );
    dac.startStream();
  }
  catch ( RtError& e ) {
    e.printMessage();
    exit( 0 );
  }
  
  char input;
  std::cout << "\nPlaying ... press <enter> to quit.\n";
  std::cin.get( input );

  try {
    // Stop the stream
    dac.stopStream();
  }
  catch (RtError& e) {
    e.printMessage();
  }

  if ( dac.isStreamOpen() ) dac.closeStream();

  return 0;
 }
 \endcode

 We open the stream in exactly the same way as the previous example (except with a data format change) and specify the address of our callback function \e "saw()". The callback function will automatically be invoked when the underlying audio system needs data for output.  Note that the callback function is called only when the stream is "running" (between calls to the RtAudio::startStream() and RtAudio::stopStream() functions).  We can also pass a pointer value to the RtAudio::openStream() function that is made available in the callback function.  In this way, it is possible to gain access to arbitrary data created in our \e main() function from within the globally defined callback function.

 In this example, we stop the stream with an explicit call to RtAudio::stopStream().  It is also possible to stop a stream by returning a non-zero value from the callback function.  A return value of 1 will cause the stream to finish draining its internal buffers and then halt (equivalent to calling the RtAudio::stopStream() function).   A return value of 2 will cause the stream to stop immediately (equivalent to calling the RtAudio::abortStream() function).

 */
--- a/doc/doxygen/probe.txt
+++ b/doc/doxygen/probe.txt
@@ -0,0 +1,70 @@
 /*! \page probe Probing Device Capabilities

 A programmer may wish to query the available audio device capabilities before deciding which to use.  The following example outlines how this can be done.

 \code

 // probe.cpp

 #include <iostream>
 #include "RtAudio.h"

 int main()
 {
  RtAudio audio;

  // Determine the number of devices available
  unsigned int devices = audio.getDeviceCount();

  // Scan through devices for various capabilities
  RtAudio::DeviceInfo info;
  for ( unsigned int i=1; i<=devices; i++ ) {

    info = audio.getDeviceInfo( i );

    if ( info.probed == true ) {
      // Print, for example, the maximum number of output channels for each device
      std::cout << "device = " << i;
      std::cout << ": maximum output channels = " << info.outputChannels << "\n";
    }
  }

  return 0;
 }
 \endcode

 The RtAudio::DeviceInfo structure is defined in RtAudio.h and provides a variety of information useful in assessing the capabilities of a device:

 \code
  typedef struct RtAudio::DeviceInfo {
    bool probed;                  // true if the device capabilities were successfully probed.
    std::string name;             // Character string device identifier.
    int outputChannels;           // Maximum output channels supported by device.
    int inputChannels;            // Maximum input channels supported by device.
    int duplexChannels;           // Maximum simultaneous input/output channels supported by device.
    bool isDefaultOutput;         // true if this is the default output device.
    bool isDefaultInput;          // true if this is the default input device.
    std::vector<int> sampleRates; // Supported sample rates.
    RtAudioFormat nativeFormats;  // Bit mask of supported data formats.
  };
 \endcode

 The following data formats are defined and fully supported by RtAudio:

 \code
  typedef unsigned long RtAudioFormat;
  static const RtAudioFormat  RTAUDIO_SINT8;   // Signed 8-bit integer
  static const RtAudioFormat  RTAUDIO_SINT16;  // Signed 16-bit integer
  static const RtAudioFormat  RTAUDIO_SINT24;  // Signed 24-bit integer (lower 3 bytes of 32-bit signed integer.)
  static const RtAudioFormat  RTAUDIO_SINT32;  // Signed 32-bit integer
  static const RtAudioFormat  RTAUDIO_FLOAT32; // 32-bit float normalized between +/- 1.0
  static const RtAudioFormat  RTAUDIO_FLOAT64; // 64-bit double normalized between +/- 1.0
 \endcode

 The \c nativeFormats member of the RtAudio::DeviceInfo structure is a bit mask of the above formats which are natively supported by the device.  However, RtAudio will automatically provide format conversion if a particular format is not natively supported.  When the \c probed member of the RtAudio::DeviceInfo structure is false, the remaining structure members are undefined and the device is probably unusable.

 Some audio devices may require a minimum channel value greater than one.  RtAudio will provide automatic channel number compensation when the number of channels set by the user is less than that required by the device.  Channel compensation is <I>NOT</I> possible when the number of channels set by the user is greater than that supported by the device.

 It should be noted that the capabilities reported by a device driver or underlying audio API are not always accurate and/or may be dependent on a combination of device settings.  For this reason, RtAudio does not rely on the queried values when attempting to open a stream.

 */
--- a/doc/doxygen/recording.txt
+++ b/doc/doxygen/recording.txt
@@ -0,0 +1,66 @@
 /*! \page recording Recording


 Using RtAudio for audio input is almost identical to the way it is used for playback.  Here's the blocking playback example rewritten for recording:

 \code
 #include "RtAudio.h"
 #include <iostream>

 int record( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,
         double streamTime, RtAudioStreamStatus status, void *userData )
 {
  if ( status )
    std::cout << "Stream overflow detected!" << std::endl;

  // Do something with the data in the "inputBuffer" buffer.

  return 0;
 }

 int main()
 {
  RtAudio adc;
  if ( adc.getDeviceCount() < 1 ) {
    std::cout << "\nNo audio devices found!\n";
    exit( 0 );
  }

  RtAudio::StreamParameters parameters;
  parameters.deviceId = adc.getDefaultInputDevice();
  parameters.nChannels = 2;
  parameters.firstChannel = 0;
  unsigned int sampleRate = 44100;
  unsigned int bufferFrames = 256; // 256 sample frames

  try {
    adc.openStream( NULL, &parameters, RTAUDIO_SINT16,
                    sampleRate, &bufferFrames, &record );
    adc.startStream();
  }
  catch ( RtError& e ) {
    e.printMessage();
    exit( 0 );
  }
  
  char input;
  std::cout << "\nRecording ... press <enter> to quit.\n";
  std::cin.get( input );

  try {
    // Stop the stream
    adc.stopStream();
  }
  catch (RtError& e) {
    e.printMessage();
  }

  if ( adc.isStreamOpen() ) adc.closeStream();

  return 0;
 }
 \endcode

 In this example, we pass the address of the stream parameter structure as the second argument of the RtAudio::openStream() function and pass a NULL value for the output stream parameters.  In this example, the \e record() callback function performs no specific operations.

 */
--- a/doc/doxygen/settings.txt
+++ b/doc/doxygen/settings.txt
@@ -0,0 +1,48 @@
 /*! \page settings Device Settings

 The next step in using RtAudio is to open a stream with particular device and parameter settings.

 \code

 #include "RtAudio.h"

 int main()
 {
  RtAudio dac;
  if ( dac.getDeviceCount() == 0 ) exit( 0 );

  RtAudio::StreamParameters parameters;
  parameters.deviceId = dac.getDefaultOutputDevice();
  parameters.nChannels = 2;
  unsigned int sampleRate = 44100;
  unsigned int bufferFrames = 256; // 256 sample frames

  RtAudio::StreamOptions options;
  options.flags = RTAUDIO_NONINTERLEAVED;

  try {
    dac.openStream( &parameters, NULL, RTAUDIO_FLOAT32,
                    sampleRate, &bufferFrames, &myCallback, NULL, &options );
  }
  catch ( RtError& e ) {
    std::cout << '\n' << e.getMessage() << '\n' << std::endl;
    exit( 0 );
  }
  
  return 0;
 }
 \endcode

 The RtAudio::openStream() function attempts to open a stream with a specified set of parameter values.  In the above example, we attempt to open a two channel playback stream using the default output device, 32-bit floating point data, a sample rate of 44100 Hz, and a frame rate of 256 sample frames per output buffer.  If the user specifies an invalid parameter value (such as a device id greater than or equal to the number of enumerated devices), an RtError is thrown of type = INVALID_USE.   If a system error occurs or the device does not support the specified parameter values, an RtError of type = SYSTEM_ERROR is thrown.  In either case, a descriptive error message is bundled with the exception and can be queried with the RtError::getMessage() or RtError::what() functions.

 RtAudio provides four signed integer and two floating point data formats which can be specified using the RtAudioFormat parameter values mentioned earlier.  If the opened device does not natively support the given format, RtAudio will automatically perform the necessary data format conversion.

 The \c bufferFrames parameter specifies the desired number of sample frames that will be written to and/or read from a device per write/read operation.  This parameter can be used to control stream latency though there is no guarantee that the passed value will be that used by a device.  In general, a lower \c bufferFrames value will produce less latency but perhaps less robust performance.  A value of zero can be specified, in which case the smallest allowable value will be used.  The \c bufferFrames parameter is passed as a pointer and the actual value used by the stream is set during the device setup procedure.  \c bufferFrames values should be a power of two.  Optimal and allowable buffer values tend to vary between systems and devices.  Stream latency can also be controlled via the optional RtAudio::StreamOptions member \c numberOfBuffers (not used in the example above), though this tends to be more system dependent.  In particular, the \c numberOfBuffers parameter is ignored when using the OS-X Core Audio, Jack, and the Windows ASIO APIs.

 As noted earlier, the device capabilities reported by a driver or underlying audio API are not always accurate and/or may be dependent on a combination of device settings.  Because of this, RtAudio does not attempt to query a device's capabilities or use previously reported values when opening a device.  Instead, RtAudio simply attempts to set the given parameters on a specified device and then checks whether the setup is successful or not.

 The RtAudioCallback parameter above is a pointer to a user-defined function that will be called whenever the audio system is ready for new output data or has new input data to be read.  Further details on the use of a callback function are provided in the next section.

 Several stream options are available to fine-tune the behavior of an audio stream.  In the example above, we specify that data will be written by the user in a \e non-interleaved format via the RtAudio::StreamOptions member \c flags.  That is, all \c bufferFrames of the first channel should be written consecutively, followed by all \c bufferFrames of the second channel.  By default (when no option is specified), RtAudio expects data to be written in an \e interleaved format.

 */
--- a/doc/doxygen/tutorial.txt
+++ b/doc/doxygen/tutorial.txt
@@ -1,761 +1,54 @@
 /*! \mainpage The RtAudio Tutorial
 /*! \mainpage The RtAudio Home Page

 <CENTER>\ref intro &nbsp;&nbsp; \ref changes &nbsp;&nbsp;\ref download &nbsp;&nbsp; \ref start &nbsp;&nbsp; \ref error &nbsp;&nbsp; \ref probing &nbsp;&nbsp; \ref settings &nbsp;&nbsp; \ref playbackb &nbsp;&nbsp; \ref playbackc &nbsp;&nbsp; \ref recording &nbsp;&nbsp; \ref duplex &nbsp;&nbsp; \ref multi &nbsp;&nbsp; \ref methods &nbsp;&nbsp; \ref compiling &nbsp;&nbsp; \ref debug &nbsp;&nbsp; \ref apinotes &nbsp;&nbsp; \ref wishlist &nbsp;&nbsp; \ref acknowledge &nbsp;&nbsp; \ref license</CENTER>

 \section intro Introduction

 RtAudio is a set of C++ classes which provide a common API (Application Programming Interface) for realtime audio input/output across Linux (native ALSA, JACK, and OSS), Macintosh OS X, SGI, and Windows (DirectSound and ASIO) operating systems.  RtAudio significantly simplifies the process of interacting with computer audio hardware.  It was designed with the following goals:
 RtAudio is a set of C++ classes that provide a common API (Application Programming Interface) for realtime audio input/output across Linux, Macintosh OS-X and Windows (DirectSound and ASIO) operating systems.  RtAudio significantly simplifies the process of interacting with computer audio hardware.  It was designed with the following objectives:

 <UL>
  <LI>object oriented C++ design</LI>
  <LI>object-oriented C++ design</LI>
  <LI>simple, common API across all supported platforms</LI>
  <LI>only two header files and one source file for easy inclusion in programming projects</LI>
  <LI>only one source and two header files for easy inclusion in programming projects</LI>
  <LI>allow simultaneous multi-api support</LI>
  <LI>blocking functionality</LI>
  <LI>callback functionality</LI>
  <LI>extensive audio device parameter control</LI>
  <LI>audio device capability probing</LI>
  <LI>automatic internal conversion for data format, channel number compensation, de-interleaving, and byte-swapping</LI>
  <LI>support dynamic connection of devices</LI>
  <LI>provide extensive audio device parameter control</LI>
  <LI>allow audio device capability probing</LI>
  <LI>automatic internal conversion for data format, channel number compensation, (de)interleaving, and byte-swapping</LI>
 </UL>

 RtAudio incorporates the concept of audio streams, which represent audio output (playback) and/or input (recording).  Available audio devices and their capabilities can be enumerated and then specified when opening a stream.  Where applicable, multiple API support can be compiled and a particular API specified when creating an RtAudio instance.  See the \ref apinotes section for information specific to each of the supported audio APIs.

 The RtAudio API provides both blocking (synchronous) and callback (asynchronous) functionality.  Callbacks are typically used in conjunction with graphical user interfaces (GUI).  Blocking functionality is often necessary for explicit control of multiple input/output stream synchronization or when audio must be synchronized with other system events.

 \section changes What's New (Version 3.0)

 RtAudio now allows simultaneous multi-api support.  For example, you can compile RtAudio to provide both DirectSound and ASIO support on Windows platforms or ALSA, JACK, and OSS support on Linux platforms.  This was accomplished by creating an abstract base class, RtApi, with subclasses for each supported API (RtApiAlsa, RtApiJack, RtApiOss, RtApiDs, RtApiAsio, RtApiCore, and RtApiAl).  The class RtAudio is now a "controller" which creates an instance of an RtApi subclass based on the user's API choice via an optional RtAudio::RtAudioApi instantiation argument.  If no API is specified, RtAudio attempts to make a "logical" API selection.

 Support for the JACK low-latency audio server has been added with this version of RtAudio.  It is necessary to have the JACK server running before creating an instance of RtAudio.

 Several API changes have been made in version 3.0 of RtAudio in an effort to provide more consistent behavior across all supported audio APIs.  The most significant of these changes is that multiple stream support from a single RtAudio instance has been discontinued.  As a result, stream identifier input arguments are no longer required.  Also, the RtAudio::streamWillBlock() function was poorly supported by most APIs and has been deprecated (though the function still exists in those subclasses of RtApi that do allow it to be implemented).
 \section whatsnew What's New (Version 4.0)

 The RtAudio::getDeviceInfo() function was modified to return a globally defined RtAudioDeviceInfo structure.  This structure is a simplified version of the previous RTAUDIO_DEVICE structure.  In addition, the RTAUDIO_FORMAT structure was renamed RtAudioFormat and defined globally within RtAudio.h.  These changes were made for clarity and to better conform with standard C++ programming practices.
 RtAudio V4 represents a significant rewrite of the code and includes a number of API and functionality changes form previous versions. A partial list of the changes includes:
 - new support for non-interleaved user data
 - additional input/output parameter specifications, including channel offset
 - new support for dynamic connection of devices
 - new support for stream time
 - revised callback arguments, including separate input and output buffer arguments
 - revised C++ exception handling
 - updated support for OSS version 4.0
 - discontinued support of blocking functionality
 - discontinued support of SGI

 The RtError class declaration and definition have been extracted to a separate file (RtError.h).  This was done in preparation for a new release of the RtMidi class (planned for Summer 2004).
 Devices are now re-enumerated every time the RtAudio::getDeviceCount(), RtAudio::getDeviceInfo(), and RtAudio::openStream() functions are called.  This allows for the proper identification of hot-pluggable (USB, Firewire, ...) devices while a given RtAudio instance exists.

 \section download Download

 Latest Release (18 November 2005): <A href="http://music.mcgill.ca/~gary/rtaudio/release/rtaudio-3.0.3.tar.gz">Version 3.0.3</A>

 \section start Getting Started

 With version 3.0, it is now possible to compile multiple API support on a given platform and to specify an API choice during class instantiation.  In the examples that follow, no API will be specified (in which case, RtAudio attempts to select the most "logical" available API).

 The first thing that must be done when using RtAudio is to create an instance of the class.  The default constructor scans the underlying audio system to verify that at least one device is available.  RtAudio often uses C++ exceptions to report errors, necessitating try/catch blocks around most member functions.  The following code example demonstrates default object construction and destruction:

 \code

 #include "RtAudio.h"

 int main()
 {
  RtAudio *audio = 0;

  // Default RtAudio constructor
  try {
    audio = new RtAudio();
  }
  catch (RtError &error) {
    // Handle the exception here
    error.printMessage();
  }

  // Clean up
  delete audio;
 }
 \endcode

 Obviously, this example doesn't demonstrate any of the real functionality of RtAudio.  However, all uses of RtAudio must begin with a constructor (either default or overloaded varieties) and must end with class destruction.  Further, it is necessary that all class methods that can throw a C++ exception be called within a try/catch block.


 \section error Error Handling

 RtAudio uses a C++ exception handler called RtError, which is declared and defined in RtError.h.  The RtError class is quite simple but it does allow errors to be "caught" by RtError::Type.  Almost all RtAudio methods can "throw" an RtError, most typically if a driver error occurs or a stream function is called when no stream is open.  There are a number of cases within RtAudio where warning messages may be displayed but an exception is not thrown.  There is a protected RtAudio method, error(), that can be modified to globally control how these messages are handled and reported.  By default, error messages are not automatically displayed in RtAudio unless the preprocessor definition __RTAUDIO_DEBUG__ is defined.  Messages associated with caught exceptions can be displayed with, for example, the RtError::printMessage() function.


 \section probing Probing Device Capabilities

 A programmer may wish to query the available audio device capabilities before deciding which to use.  The following example outlines how this can be done.

 \code

 // probe.cpp

 #include <iostream>
 #include "RtAudio.h"

 int main()
 {
  RtAudio *audio = 0;

  // Default RtAudio constructor
  try {
    audio = new RtAudio();
  }
  catch (RtError &error) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

  // Determine the number of devices available
  int devices = audio->getDeviceCount();

  // Scan through devices for various capabilities
  RtAudioDeviceInfo info;
  for (int i=1; i<=devices; i++) {

    try {
      info = audio->getDeviceInfo(i);
    }
    catch (RtError &error) {
      error.printMessage();
      break;
    }

    // Print, for example, the maximum number of output channels for each device
    std::cout << "device = " << i;
    std::cout << ": maximum output channels = " << info.outputChannels << "\n";
  }

  // Clean up
  delete audio;

  return 0;
 }
 \endcode

 The RtAudioDeviceInfo structure is defined in RtAudio.h and provides a variety of information useful in assessing the capabilities of a device:

 \code
  typedef struct RtAudioDeviceInfo{
    std::string name;             // Character string device identifier.
    bool probed;                  // true if the device capabilities were successfully probed.
    int outputChannels;           // Maximum output channels supported by device.
    int inputChannels;            // Maximum input channels supported by device.
    int duplexChannels;           // Maximum simultaneous input/output channels supported by device.
    bool isDefault;               // true if this is the default output or input device.
    std::vector<int> sampleRates; // Supported sample rates.
    RtAudioFormat nativeFormats;  // Bit mask of supported data formats.
  };
 \endcode

 The following data formats are defined and fully supported by RtAudio:

 \code
  typedef unsigned long RtAudioFormat;
  static const RtAudioFormat  RTAUDIO_SINT8;   // Signed 8-bit integer
  static const RtAudioFormat  RTAUDIO_SINT16;  // Signed 16-bit integer
  static const RtAudioFormat  RTAUDIO_SINT24;  // Signed 24-bit integer (upper 3 bytes of 32-bit signed integer.)
  static const RtAudioFormat  RTAUDIO_SINT32;  // Signed 32-bit integer
  static const RtAudioFormat  RTAUDIO_FLOAT32; // 32-bit float normalized between +/- 1.0
  static const RtAudioFormat  RTAUDIO_FLOAT64; // 64-bit double normalized between +/- 1.0
 \endcode

 The <I>nativeFormats</I> member of the RtAudioDeviceInfo structure is a bit mask of the above formats that are natively supported by the device.  However, RtAudio will automatically provide format conversion if a particular format is not natively supported.  When the <I>probed</I> member of the RtAudioDeviceInfo structure is false, the remaining structure members are undefined and the device is probably unuseable.

 While some audio devices may require a minimum channel value greater than one, RtAudio will provide automatic channel number compensation when the number of channels set by the user is less than that required by the device.  Channel compensation is <I>NOT</I> possible when the number of channels set by the user is greater than that supported by the device.

 It should be noted that the capabilities reported by a device driver or underlying audio API are not always accurate and/or may be dependent on a combination of device settings.  For this reason, RtAudio does not typically rely on the queried values when attempting to open a stream.


 \section settings Device Settings

 The next step in using RtAudio is to open a stream with particular device and parameter settings.

 \code

 #include "RtAudio.h"

 int main()
 {
  int channels = 2;
  int sampleRate = 44100;
  int bufferSize = 256;  // 256 sample frames
  int nBuffers = 4;      // number of internal buffers used by device
  int device = 0;        // 0 indicates the default or first available device
  RtAudio *audio = 0;

  // Instantiate RtAudio and open a stream within a try/catch block
  try {
    audio = new RtAudio();
  }
  catch (RtError &error) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

  try {
    audio->openStream(device, channels, 0, 0, RTAUDIO_FLOAT32,
                      sampleRate, &bufferSize, nBuffers);
  }
  catch (RtError &error) {
    error.printMessage();
    // Perhaps try other parameters?
  }

  // Clean up
  delete audio;

  return 0;
 }
 \endcode

 The RtAudio::openStream() method attempts to open a stream with a specified set of parameter values.  In this case, we attempt to open a two channel playback stream with the default output device, 32-bit floating point data, a sample rate of 44100 Hz, a frame rate of 256 sample frames per read/write, and 4 internal device buffers.  When device = 0, RtAudio first attempts to open the default audio device with the given parameters.  If that attempt fails, RtAudio searches through the remaining available devices in an effort to find a device that will meet the given parameters.  If all attempts are unsuccessful, an RtError is thrown.  When a non-zero device value is specified, an attempt is made to open that device \e ONLY (device = 1 specifies the first identified device, as reported by RtAudio::getDeviceInfo()).

 RtAudio provides four signed integer and two floating point data formats that can be specified using the RtAudioFormat parameter values mentioned earlier.  If the opened device does not natively support the given format, RtAudio will automatically perform the necessary data format conversion.

 The <I>bufferSize</I> parameter specifies the desired number of sample frames that will be written to and/or read from a device per write/read operation.  The <I>nBuffers</I> parameter is used in setting the underlying device buffer parameters.  Both the <I>bufferSize</I> and <I>nBuffers</I> parameters can be used to control stream latency though there is no guarantee that the passed values will be those used by a device (the <I>nBuffers</I> parameter is ignored when using the OS X CoreAudio, Linux Jack, and the Windows ASIO APIs).  In general, lower values for both parameters will produce less latency but perhaps less robust performance.  Both parameters can be specified with values of zero, in which case the smallest allowable values will be used.  The <I>bufferSize</I> parameter is passed as a pointer and the actual value used by the stream is set during the device setup procedure.  <I>bufferSize</I> values should be a power of two.  Optimal and allowable buffer values tend to vary between systems and devices.  Check the \ref apinotes section for general guidelines.

 As noted earlier, the device capabilities reported by a driver or underlying audio API are not always accurate and/or may be dependent on a combination of device settings.  Because of this, RtAudio does not attempt to query a device's capabilities or use previously reported values when opening a device.  Instead, RtAudio simply attempts to set the given parameters on a specified device and then checks whether the setup is successful or not.


 \section playbackb Playback (blocking functionality)

 Once the device is open for playback, there are only a few final steps necessary for realtime audio output.  We'll first provide an example (blocking functionality) and then discuss the details.

 \code
 // playback.cpp

 #include "RtAudio.h"

 int main()
 {
  int count;
  int channels = 2;
  int sampleRate = 44100;
  int bufferSize = 256;  // 256 sample frames
  int nBuffers = 4;      // number of internal buffers used by device
  float *buffer;
  int device = 0;        // 0 indicates the default or first available device
  RtAudio *audio = 0;

  // Open a stream during RtAudio instantiation
  try {
    audio = new RtAudio(device, channels, 0, 0, RTAUDIO_FLOAT32,
                        sampleRate, &bufferSize, nBuffers);
  }
  catch (RtError &error) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

  try {
    // Get a pointer to the stream buffer
    buffer = (float *) audio->getStreamBuffer();

    // Start the stream
    audio->startStream();
  }
  catch (RtError &error) {
    error.printMessage();
    goto cleanup;
  }

  // An example loop that runs for 40000 sample frames
  count = 0;
  while (count < 40000) {
    // Generate your samples and fill the buffer with bufferSize sample frames of data
    ...

    // Trigger the output of the data buffer
    try {
      audio->tickStream();
    }
    catch (RtError &error) {
      error.printMessage();
      goto cleanup;
    }

    count += bufferSize;
  }

  try {
    // Stop and close the stream
    audio->stopStream();
    audio->closeStream();
  }
  catch (RtError &error) {
    error.printMessage();
  }

 cleanup:
  delete audio;

  return 0;
 }
 \endcode

 The first thing to notice in this example is that we attempt to open a stream during class instantiation with an overloaded constructor.  This constructor simply combines the functionality of the default constructor, used earlier, and the RtAudio::openStream() method.  Again, we have specified a device value of 0, indicating that the default or first available device meeting the given parameters should be used.  An attempt is made to open the stream with the specified <I>bufferSize</I> value.  However, it is possible that the device will not accept this value, in which case the closest allowable size is used and returned via the pointer value.   The constructor can fail if no available devices are found, or a memory allocation or device driver error occurs.  Note that you should not call the RtAudio destructor if an exception is thrown during instantiation.

 Assuming the constructor is successful, it is necessary to get a pointer to the buffer, provided by RtAudio, for use in feeding data to/from the opened stream.  Note that the user should <I>NOT</I> attempt to deallocate the stream buffer memory ... memory management for the stream buffer will be automatically controlled by RtAudio.  After starting the stream with RtAudio::startStream(), one simply fills that buffer, which is of length equal to the returned <I>bufferSize</I> value, with interleaved audio data (in the specified format) for playback.  Finally, a call to the RtAudio::tickStream() routine triggers a blocking write call for the stream.

 In general, one should call the RtAudio::stopStream() and RtAudio::closeStream() methods after finishing with a stream.  However, both methods will implicitly be called during object destruction if necessary.


 \section playbackc Playback (callback functionality)

 The primary difference in using RtAudio with callback functionality involves the creation of a user-defined callback function.  Here is an example that produces a sawtooth waveform for playback.

 \code

 #include <iostream>
 #include "RtAudio.h"

 // Two-channel sawtooth wave generator.
 int sawtooth(char *buffer, int bufferSize, void *data)
 {
  int i, j;
  double *my_buffer = (double *) buffer;
  double *my_data = (double *) data;

  // Write interleaved audio data.
  for (i=0; i<bufferSize; i++) {
    for (j=0; j<2; j++) {
      *my_buffer++ = my_data[j];

      my_data[j] += 0.005 * (j+1+(j*0.1));
      if (my_data[j] >= 1.0) my_data[j] -= 2.0;
    }
  }

  return 0;
 }

 int main()
 {
  int channels = 2;
  int sampleRate = 44100;
  int bufferSize = 256;  // 256 sample frames
  int nBuffers = 4;      // number of internal buffers used by device
  int device = 0;        // 0 indicates the default or first available device
  double data[2];
  char input;
  RtAudio *audio = 0;

  // Open a stream during RtAudio instantiation
  try {
    audio = new RtAudio(device, channels, 0, 0, RTAUDIO_FLOAT64,
                        sampleRate, &bufferSize, nBuffers);
  }
  catch (RtError &error) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

  try {
    // Set the stream callback function
    audio->setStreamCallback(&sawtooth, (void *)data);

    // Start the stream
    audio->startStream();
  }
  catch (RtError &error) {
    error.printMessage();
    goto cleanup;
  }

  std::cout << "\nPlaying ... press <enter> to quit.\n";
  std::cin.get(input);

  try {
    // Stop and close the stream
    audio->stopStream();
    audio->closeStream();
  }
  catch (RtError &error) {
    error.printMessage();
  }

 cleanup:
  delete audio;

  return 0;
 }
 \endcode

 After opening the device in exactly the same way as the previous example (except with a data format change), we must set our callback function for the stream using RtAudio::setStreamCallback().  When the underlying audio API uses blocking calls (OSS, ALSA, SGI, and Windows DirectSound), this method will spawn a new process (or thread) that automatically calls the callback function when more data is needed.  Callback-based audio APIs (OS X CoreAudio Linux Jack, and ASIO) implement their own event notification schemes.  Note that the callback function is called only when the stream is "running" (between calls to the RtAudio::startStream() and RtAudio::stopStream() methods).  The last argument to RtAudio::setStreamCallback() is a pointer to arbitrary data that you wish to access from within your callback function.

 In this example, we stop the stream with an explicit call to RtAudio::stopStream().  When using callback functionality, it is also possible to stop a stream by returning a non-zero value from the callback function.

 Once set with RtAudio::setStreamCallback, the callback process exists for the life of the stream (until the stream is closed with RtAudio::closeStream() or the RtAudio instance is deleted).  It is possible to disassociate a callback function and cancel its process for an open stream using the RtAudio::cancelStreamCallback() method.  The stream can then be used with blocking functionality or a new callback can be associated with it.


 \section recording Recording

 Using RtAudio for audio input is almost identical to the way it is used for playback.  Here's the blocking playback example rewritten for recording:

 \code
 // record.cpp

 #include "RtAudio.h"

 int main()
 {
  int count;
  int channels = 2;
  int sampleRate = 44100;
  int bufferSize = 256;  // 256 sample frames
  int nBuffers = 4;      // number of internal buffers used by device
  float *buffer;
  int device = 0;        // 0 indicates the default or first available device
  RtAudio *audio = 0;

  // Instantiate RtAudio and open a stream.
  try {
    audio = new RtAudio(&stream, 0, 0, device, channels,
                        RTAUDIO_FLOAT32, sampleRate, &bufferSize, nBuffers);
  }
  catch (RtError &error) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

  try {
    // Get a pointer to the stream buffer
    buffer = (float *) audio->getStreamBuffer();

    // Start the stream
    audio->startStream();
  }
  catch (RtError &error) {
    error.printMessage();
    goto cleanup;
  }

  // An example loop that runs for about 40000 sample frames
  count = 0;
  while (count < 40000) {

    // Read a buffer of data
    try {
      audio->tickStream();
    }
    catch (RtError &error) {
      error.printMessage();
      goto cleanup;
    }

    // Process the input samples (bufferSize sample frames) that were read
    ...

    count += bufferSize;
  }

  try {
    // Stop the stream
    audio->stopStream();
  }
  catch (RtError &error) {
    error.printMessage();
  }

 cleanup:
  delete audio;

  return 0;
 }
 \endcode

 In this example, the stream was opened for recording with a non-zero <I>inputChannels</I> value.  The only other difference between this example and that for playback involves the order of data processing in the loop, where it is necessary to first read a buffer of input data before manipulating it.


 \section duplex Duplex Mode

 Finally, it is easy to use RtAudio for simultaneous audio input/output, or duplex operation.  In this example, we use a callback function and simply scale the input data before sending it back to the output.

 \code
 // duplex.cpp

 #include <iostream>
 #include "RtAudio.h"

 // Pass-through function.
 int scale(char *buffer, int bufferSize, void *)
 {
  // Note: do nothing here for pass through.
  double *my_buffer = (double *) buffer;

  // Scale input data for output.
  for (int i=0; i<bufferSize; i++) {
    // Do for two channels.
    *my_buffer++ *= 0.5;
    *my_buffer++ *= 0.5;
  }

  return 0;
 }

 int main()
 {
  int channels = 2;
  int sampleRate = 44100;
  int bufferSize = 256;  // 256 sample frames
  int nBuffers = 4;      // number of internal buffers used by device
  int device = 0;        // 0 indicates the default or first available device
  char input;
  RtAudio *audio = 0;

  // Open a stream during RtAudio instantiation
  try {
    audio = new RtAudio(device, channels, device, channels, RTAUDIO_FLOAT64,
                        sampleRate, &bufferSize, nBuffers);
  }
  catch (RtError &error) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

  try {
    // Set the stream callback function
    audio->setStreamCallback(&scale, NULL);

    // Start the stream
    audio->startStream();
  }
  catch (RtError &error) {
    error.printMessage();
    goto cleanup;
  }

  std::cout << "\nRunning duplex ... press <enter> to quit.\n";
  std::cin.get(input);

  try {
    // Stop and close the stream
    audio->stopStream();
    audio->closeStream();
  }
  catch (RtError &error) {
    error.printMessage();
  }

 cleanup:
  delete audio;

  return 0;
 }
 \endcode

 When an RtAudio stream is running in duplex mode (nonzero input <I>AND</I> output channels), the audio write (playback) operation always occurs before the audio read (record) operation.  This sequence allows the use of a single buffer to store both output and input data.

 As we see with this example, the write-read sequence of operations does not preclude the use of RtAudio in situations where input data is first processed and then output through a duplex stream.  When the stream buffer is first allocated, it is initialized with zeros, which produces no audible result when output to the device.  In this example, anything recorded by the audio stream input will be scaled and played out during the next round of audio processing.

 Note that duplex operation can also be achieved by opening one output stream instance and one input stream instance using the same or different devices.  However, there may be timing problems when attempting to use two different devices, due to possible device clock variations, unless a common external "sync" is provided.  This becomes even more difficult to achieve using two separate callback streams because it is not possible to <I>explicitly</I> control the calling order of the callback functions.


 \section multi Using Simultaneous Multiple APIs

 Because support for each audio API is encapsulated in a specific RtApi subclass, it is possible to compile and instantiate multiple API-specific subclasses on a given operating system.  For example, one can compile both the RtApiDs and RtApiAsio classes on Windows operating systems by providing the appropriate preprocessor definitions, include files, and libraries for each.  In a run-time situation, one might first attempt to determine whether any ASIO device drivers exist.  This can be done by specifying the api argument RtAudio::WINDOWS_ASIO when attempting to create an instance of RtAudio.  If an RtError is thrown (indicating no available drivers), then an instance of RtAudio with the api argument RtAudio::WINDOWS_DS can be created.  Alternately, if no api argument is specified, RtAudio will first look for ASIO drivers and then DirectSound drivers (on Linux systems, the default API search order is Jack, Alsa, and finally OSS).  In theory, it should also be possible to have separate instances of RtAudio open at the same time with different underlying audio API support, though this has not been tested.  It is difficult to know how well different audio APIs can simultaneously coexist on a given operating system.  In particular, it is most unlikely that the same device could be simultaneously controlled with two different audio APIs.


 \section methods Summary of Methods

 The following is a short summary of public methods (not including constructors and the destructor) provided by RtAudio:

 <UL>
 <LI>RtAudio::openStream(): opens a stream with the specified parameters.</LI>
 <LI>RtAudio::setStreamCallback(): sets a user-defined callback function for the stream.</LI>
 <LI>RtAudio::cancelStreamCallback(): cancels a callback process and function for the stream.</LI>
 <LI>RtAudio::getDeviceCount(): returns the number of audio devices available.</LI>
 <LI>RtAudio::getDeviceInfo(): returns an RtAudioDeviceInfo structure for a specified device.</LI>
 <LI>RtAudio::getStreamBuffer(): returns a pointer to the stream buffer.</LI>
 <LI>RtAudio::tickStream(): triggers processing of input/output data for the stream (blocking).</LI>
 <LI>RtAudio::closeStream(): closes the stream (implicitly called during object destruction).</LI>
 <LI>RtAudio::startStream(): (re)starts the stream, typically after it has been stopped with either stopStream() or abortStream() or after first opening the stream.</LI>
 <LI>RtAudio::stopStream(): stops the stream, allowing any remaining samples in the queue to be played out and/or read in.  This does not implicitly call RtAudio::closeStream().</LI>
 <LI>RtAudio::abortStream(): stops the stream, discarding any remaining samples in the queue.  This does not implicitly call closeStream().</LI>
 </UL>


 \section compiling Compiling

 In order to compile RtAudio for a specific OS and audio API, it is necessary to supply the appropriate preprocessor definition and library within the compiler statement:
 <P>

 <TABLE BORDER=2 COLS=5 WIDTH="100%">
 <TR BGCOLOR="beige">
  <TD WIDTH="5%"><B>OS:</B></TD>
  <TD WIDTH="5%"><B>Audio API:</B></TD>
  <TD WIDTH="5%"><B>C++ Class:</B></TD>
  <TD WIDTH="5%"><B>Preprocessor Definition:</B></TD>
  <TD WIDTH="5%"><B>Library or Framework:</B></TD>
  <TD><B>Example Compiler Statement:</B></TD>
 </TR>
 <TR>
  <TD>Linux</TD>
  <TD>ALSA</TD>
  <TD>RtApiAlsa</TD>
  <TD>__LINUX_ALSA__</TD>
  <TD><TT>asound, pthread</TT></TD>
  <TD><TT>g++ -Wall -D__LINUX_ALSA__ -o probe probe.cpp RtAudio.cpp -lasound -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Linux</TD>
  <TD>Jack Audio Server</TD>
  <TD>RtApiJack</TD>
  <TD>__LINUX_JACK__</TD>
  <TD><TT>jack, pthread</TT></TD>
  <TD><TT>g++ -Wall -D__LINUX_JACK__ -o probe probe.cpp RtAudio.cpp `pkg-config --cflags --libs jack` -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Linux</TD>
  <TD>OSS</TD>
  <TD>RtApiOss</TD>
  <TD>__LINUX_OSS__</TD>
  <TD><TT>pthread</TT></TD>
  <TD><TT>g++ -Wall -D__LINUX_OSS__ -o probe probe.cpp RtAudio.cpp -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Macintosh OS X</TD>
  <TD>CoreAudio</TD>
  <TD>RtApiCore</TD>
  <TD>__MACOSX_CORE__</TD>
  <TD><TT>pthread, stdc++, CoreAudio</TT></TD>
  <TD><TT>g++ -Wall -D__MACOSX_CORE__ -o probe probe.cpp RtAudio.cpp -framework CoreAudio -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Irix</TD>
  <TD>AL</TD>
  <TD>RtApiAl</TD>
  <TD>__IRIX_AL__</TD>
  <TD><TT>audio, pthread</TT></TD>
  <TD><TT>CC -Wall -D__IRIX_AL__ -o probe probe.cpp RtAudio.cpp -laudio -lpthread</TT></TD>
 </TR>
 <TR>
  <TD>Windows</TD>
  <TD>Direct Sound</TD>
  <TD>RtApiDs</TD>
  <TD>__WINDOWS_DS__</TD>
  <TD><TT>dsound.lib (ver. 5.0 or higher), multithreaded</TT></TD>
  <TD><I>compiler specific</I></TD>
 </TR>
 <TR>
  <TD>Windows</TD>
  <TD>ASIO</TD>
  <TD>RtApiAsio</TD>
  <TD>__WINDOWS_ASIO__</TD>
  <TD><I>various ASIO header and source files</I></TD>
  <TD><I>compiler specific</I></TD>
 </TR>
 </TABLE>
 <P>

 The example compiler statements above could be used to compile the <TT>probe.cpp</TT> example file, assuming that <TT>probe.cpp</TT>, <TT>RtAudio.h</TT>, <tt>RtError.h</tt>, and <TT>RtAudio.cpp</TT> all exist in the same directory.

 \section debug Debugging

 If you are having problems getting RtAudio to run on your system, try passing the preprocessor definition <TT>__RTAUDIO_DEBUG__</TT> to the compiler (or uncomment the definition at the bottom of RtAudio.h).  A variety of warning messages will be displayed that may help in determining the problem.  Also try using the programs included in the <tt>test</tt> directory.  The program <tt>info</tt> displays the queried capabilities of all hardware devices found.

 \section apinotes API Notes

 RtAudio is designed to provide a common API across the various supported operating systems and audio libraries.  Despite that, some issues should be mentioned with regard to each.

 \subsection linux Linux:

 RtAudio for Linux was developed under Redhat distributions 7.0 - Fedora.  Three different audio APIs are supported on Linux platforms: OSS, <A href="http://www.alsa-project.org/">ALSA</A>, and <A href="http://jackit.sourceforge.net/">Jack</A>.  The OSS API has existed for at least 6 years and the Linux kernel is distributed with free versions of OSS audio drivers.  Therefore, a generic Linux system is most likely to have OSS support (though the availability and quality of OSS drivers for new hardware is decreasing).  The ALSA API, although relatively new, is now part of the Linux development kernel and offers significantly better functionality than the OSS API.  RtAudio provides support for the 1.0 and higher versions of ALSA.  Jack, which is still in development, is a low-latency audio server, written primarily for the GNU/Linux operating system. It can connect a number of different applications to an audio device, as well as allow them to share audio between themselves.  Input/output latency on the order of 15 milliseconds can typically be achieved using any of the Linux APIs by fine-tuning the RtAudio buffer parameters (without kernel modifications).  Latencies on the order of 5 milliseconds or less can be achieved using a low-latency kernel patch and increasing FIFO scheduling priority.  The pthread library, which is used for callback functionality, is a standard component of all Linux distributions.

 The ALSA library includes OSS emulation support.  That means that you can run programs compiled for the OSS API even when using the ALSA drivers and library.  It should be noted however that OSS emulation under ALSA is not perfect.  Specifically, channel number queries seem to consistently produce invalid results.  While OSS emulation is successful for the majority of RtAudio tests, it is recommended that the native ALSA implementation of RtAudio be used on systems that have ALSA drivers installed.

 The ALSA implementation of RtAudio makes no use of the ALSA "plug" interface.  All necessary data format conversions, channel compensation, de-interleaving, and byte-swapping is handled by internal RtAudio routines.

 The Jack API is based on a callback scheme.  RtAudio provides blocking functionality, in addition to callback functionality, within the context of that behavior.  It should be noted, however, that the best performance is achieved when using RtAudio's callback functionality with the Jack API.  At the moment, only one RtAudio instance can be connected to the Jack server.  Because RtAudio does not provide a mechanism for allowing the user to specify particular channels (or ports) of a device, it simply opens the first <I>N</I> enumerated Jack ports for input/output.

 \subsection macosx Macintosh OS X (CoreAudio):

 The Apple CoreAudio API is based on a callback scheme.  RtAudio provides blocking functionality, in addition to callback functionality, within the context of that behavior.  CoreAudio is designed to use a separate callback procedure for each of its audio devices.  A single RtAudio duplex stream using two different devices is supported, though it cannot be guaranteed to always behave correctly because we cannot synchronize these two callbacks.  This same functionality might be achieved with better synchrony by creating separate instances of RtAudio for each device and making use of RtAudio blocking calls (i.e. RtAudio::tickStream()).  The <I>numberOfBuffers</I> parameter to the RtAudio::openStream() function has no affect in this implementation.

 It is not possible to have multiple instances of RtAudio accessing the same CoreAudio device.

 \subsection irix Irix (SGI):

 The Irix version of RtAudio was written and tested on an SGI Indy running Irix version 6.5.4 and the newer "al" audio library.  RtAudio does not compile under Irix version 6.3, mainly because the C++ compiler is too old.  Despite the relatively slow speed of the Indy, RtAudio was found to behave quite well and input/output latency was very good.  No problems were found with respect to using the pthread library.

 \subsection windowsds Windows (DirectSound):

 In order to compile RtAudio under Windows for the DirectSound API, you must have the header and source files for DirectSound version 5.0 or higher.  As far as I know, there is no DirectSoundCapture support for Windows NT.  Audio output latency with DirectSound can be reasonably good, especially since RtAudio version 3.0.2.  Input audio latency still tends to be bad but better since version 3.0.2.  RtAudio was originally developed with Visual C++ version 6.0 but has been tested with .NET.

 The DirectSound version of RtAudio can be compiled with or without the UNICODE preprocessor definition.

 \subsection windowsasio Windows (ASIO):

 The Steinberg ASIO audio API is based on a callback scheme.  In addition, the API allows only a single device driver to be loaded and accessed at a time.  ASIO device drivers must be supplied by audio hardware manufacturers, though ASIO emulation is possible on top of systems with DirectSound drivers.  The <I>numberOfBuffers</I> parameter to the RtAudio::openStream() function has no affect in this implementation.

 A number of ASIO source and header files are required for use with RtAudio.  Specifically, an RtAudio project must include the following files: <TT>asio.h,cpp; asiodrivers.h,cpp; asiolist.h,cpp; asiodrvr.h; asiosys.h; ginclude.h; iasiodrv.h; iasiothiscallresolver.h,cpp</TT>.  The Visual C++ projects found in <TT>/tests/Windows/</TT> compile both ASIO and DirectSound support.

 The Steinberg provided <TT>asiolist</TT> class does not compile when the preprocessor definition UNICODE is defined.  Note that this could be an issue when using RtAudio with Qt, though Qt programs appear to compile without the UNICODE definition (try <tt>DEFINES -= UNICODE</tt> in your .pro file).  RtAudio with ASIO support has been tested using the MinGW compiler under Windows XP, as well as in the Visual Studio environment.

 \section wishlist Possible Future Changes

 There are a few issues that still need to be addressed in future versions of RtAudio, including:

 <ul>
 <li>Provide a mechanism so the user can "pre-fill" audio output buffers to allow precise measurement of an acoustic response;</li>
 <li>Allow the user to read / write non-interleaved data to / from the audio buffer;</li>
 <li>Further support in Windows OS for multi-channel (>2) input / output.  This is currently only possible with ASIO interface (in large part due to limitations with the DirectSound API).  But perhaps a port to the WinMM API should be investigated?</li>
 <li>Investigate the possibility of allowing the user to select specific channels of a soundcard.  For example, if an audio device supports 8 channels and the user wishes to send data out channels 7-8 only, it is currently necessary to open all 8 channels and write the two channels of output data to the correct positions in each audio frame of an interleaved data buffer.</li>
 </ul>

 \section acknowledge Acknowledgements

 Many thanks to the following people for providing bug fixes and improvements:
 <UL>
 <LI>Robin Davies (Windows DS and ASIO)</LI>
 <LI>Ryan Williams (Windows non-MS compiler ASIO support)</LI>
 <LI>Ed Wildgoose (Linux ALSA and Jack)</LI>
 </UL>

 The RtAudio API incorporates many of the concepts developed in the <A
 href="http://www.portaudio.com/">PortAudio</A> project by Phil Burk
 and Ross Bencina.  Early development also incorporated ideas from Bill
 Schottstaedt's <A
 href="http://www-ccrma.stanford.edu/software/snd/sndlib/">sndlib</A>.
 The CCRMA <A
 href="http://www-ccrma.stanford.edu/groups/soundwire/">SoundWire
 group</A> provided valuable feedback during the API proposal stages.

 The early 2.0 version of RtAudio was slowly developed over the course
 of many months while in residence at the <A
 href="http://www.iua.upf.es/">Institut Universitari de L'Audiovisual
 (IUA)</A> in Barcelona, Spain and the <A
 href="http://www.acoustics.hut.fi/">Laboratory of Acoustics and Audio
 Signal Processing</A> at the Helsinki University of Technology,
 Finland.  Much subsequent development happened while working at the <A
 href="http://www-ccrma.stanford.edu/">Center for Computer Research in
 Music and Acoustics (CCRMA)</A> at <A
 href="http://www.stanford.edu/">Stanford University</A>.  The most
 recent version of RtAudio was finished while working as an assistant
 professor of <a href="http://www.music.mcgill.ca/musictech/">Music
 Technology</a> at <a href="http://www.mcgill.ca/">McGill
 University</a>.  This work was supported in part by the United States
 Air Force Office of Scientific Research (grant \#F49620-99-1-0293).

 \section license License

    RtAudio: a realtime audio i/o C++ classes<BR>
    Copyright (c) 2001-2005 Gary P. Scavone

    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation files
    (the "Software"), to deal in the Software without restriction,
    including without limitation the rights to use, copy, modify, merge,
    publish, distribute, sublicense, and/or sell copies of the Software,
    and to permit persons to whom the Software is furnished to do so,
    subject to the following conditions:

    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.

    Any person wishing to distribute modifications to the Software is
    requested to send the modifications to the original developer so that
    they can be incorporated into the canonical version.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
    ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 Latest Release (7 August 2007): <A href="http://music.mcgill.ca/~gary/rtaudio/release/rtaudio-4.0.0.tar.gz">Version 4.0.0</A>

 \section documentation Documentation Links

 -# \ref errors
 -# \ref probe
 -# \ref settings
 -# \ref playback
 -# \ref recording
 -# \ref duplex
 -# \ref multi
 -# \ref compiling
 -# \ref apinotes
 -# \ref acknowledge
 -# \ref license
 -# <A href="bugs.html">Bug Tracker</A>
 -# <A href="updates.html">Possible Updates</A>
 -# <A href="http://sourceforge.net/projects/rtaudio">RtAudio at SourceForge</A>

 */
--- a/doc/release.txt
+++ b/doc/release.txt
@@ -1,12 +1,27 @@
 RtAudio - a set of C++ classes which provide a common API for realtime audio input/output across Linux (native ALSA, JACK, and OSS), SGI, Macintosh OS X (CoreAudio), and Windows (DirectSound and ASIO) operating systems.
 RtAudio - a set of C++ classes that provide a common API for realtime audio input/output across Linux (native ALSA, JACK, and OSS), Macintosh OS X (CoreAudio and JACK), and Windows (DirectSound and ASIO) operating systems.

 By Gary P. Scavone, 2001-2005.
 By Gary P. Scavone, 2001-2007.

 v3.0.3: ( November 2005)
 v4.0.0: (7 August 2007)
 - new support for non-interleaved user data
 - additional input/output parameter specifications, including channel offset
 - new support for dynamic connection of devices
 - new support for stream time
 - revised callback arguments, including separate input and output buffer arguments
 - revised C++ exception handling
 - revised OSS support for version 4.0
 - discontinued support of blocking functionality
 - discontinued support of SGI
 - Windows DirectSound API bug fix
 - NetBSD support (using OSS API) by Emmanuel Dreyfus
 - changed default pthread scheduling priority to SCHED_RR when defined in the system
 - new getCompiledApi() static function
 - new getCurrentApi(), getStreamTime(), getStreamLatency(), and isStreamRunning() functions
 - modified RtAudioDeviceInfo structure to distinguish default input and output devices

 v3.0.3: (18 November 2005)
 - UNICODE fix for Windows DirectSound API
 - MinGW compiler fix for ASIO API
 - jack support to create virtual devices for each jack plugin
 - support to prefill output buffer with zeroes in duplex mode

 v3.0.2: (14 October 2005)
 - modification of ALSA read/write order to fix duplex under/overruns
--- a/install
+++ b/install
@@ -1,6 +1,6 @@
 RtAudio - a set of C++ classes which provide a common API for realtime audio input/output across Linux (native ALSA, JACK, and OSS), SGI, Macintosh OS X (CoreAudio), and Windows (DirectSound and ASIO) operating systems.
 RtAudio - a set of C++ classes which provide a common API for realtime audio input/output across Linux (native ALSA, JACK, and OSS), Macintosh OS X (CoreAudio and JACK), and Windows (DirectSound and ASIO) operating systems.

 By Gary P. Scavone, 2001-2005.
 By Gary P. Scavone, 2001-2007.

 To configure and compile (on Unix systems):

@@ -15,8 +15,9 @@ A few options can be passed to configure, including:

  --enable-debug = enable various debug output
  --with-alsa = choose native ALSA API support (linux only)
  --with-jack = choose JACK server support (linux only)
  --with-oss = choose OSS API support (linux only)
  --with-jack = choose JACK server support (linux or Macintosh OS-X)
  --with-core = choose CoreAudio API support (Macintosh OS-X only)

 Typing "./configure --help" will display all the available options.  Note that you can provide more than one "--with-" flag to the configure script to enable multiple API support.

@@ -27,4 +28,4 @@ If you wish to use a different compiler than that selected by configure, specify

 For Windows Users:

 Visual C++ 6.0 project files are included for the test programs in the /tests/Windows/ directory.  These projects compile API support for both ASIO and DirectSound.
 Visual C++ 6.0 project files are included for the test programs in the /tests/Windows/ directory.  These projects compile API support for both ASIO and DirectSound.  Version 4.0 of RtAudio was tested with the .net compiler and it will not compile in Visual C++ 6.0 because of its non-conformance to modern C++ standards.
--- a/oss/soundcard.h
+++ b/oss/soundcard.h
--- a/readme
+++ b/readme
@@ -1,44 +1,40 @@
 RtAudio - a set of C++ classes which provide a common API for realtime audio input/output across Linux (native ALSA, JACK, and OSS), SGI, Macintosh OS X (CoreAudio), and Windows (DirectSound and ASIO) operating systems.
 RtAudio - a set of C++ classes that provide a common API for realtime audio input/output across Linux (native ALSA, JACK, and OSS), Macintosh OS X (CoreAudio and JACK), and Windows (DirectSound and ASIO) operating systems.

 By Gary P. Scavone, 2001-2005.
 By Gary P. Scavone, 2001-2007.

 This distribution of RtAudio contains the following:

 doc:      RtAudio documentation (see doc/html/index.html)
 tests:    example RtAudio programs
 asio:     header files necessary for ASIO compilation
 tests/Windows: Visual C++ 6.0 test program workspace and projects
 asio:     header and source files necessary for ASIO compilation
 tests/Windows: Visual C++ .net test program workspace and projects

 OVERVIEW:

 RtAudio is a set of C++ classes which provide a common API (Application Programming Interface) for realtime audio input/output across Linux (native ALSA, JACK, and OSS), SGI, Macintosh OS X (CoreAudio), and Windows (DirectSound and ASIO) operating systems. RtAudio significantly simplifies the process of interacting with computer audio hardware. It was designed with the following goals:
 RtAudio is a set of C++ classes that provide a common API (Application Programming Interface) for realtime audio input/output across Linux (native ALSA, JACK, and OSS), Macintosh OS X, SGI, and Windows (DirectSound and ASIO) operating systems.  RtAudio significantly simplifies the process of interacting with computer audio hardware.  It was designed with the following objectives:

  - object oriented C++ design
  - object-oriented C++ design
  - simple, common API across all supported platforms
  - only two header files and one source file for easy inclusion in programming projects
  - only one source and two header files for easy inclusion in programming projects
  - allow simultaneous multi-api support
  - blocking functionality
  - callback functionality
  - extensive audio device parameter control
  - audio device capability probing
  - automatic internal conversion for data format, channel number compensation, de-interleaving, and byte-swapping

 RtAudio incorporates the concept of audio streams, which represent audio output (playback) and/or input (recording). Available audio devices and their capabilities can be enumerated and then specified when opening a stream.  Where applicable, multiple API support can be compiled and a particular API specified when creating an RtAudio instance.

 The RtAudio API provides both blocking (synchronous) and callback (asyncronous) functionality. Callbacks are typically used in conjunction with graphical user interfaces (GUI). Blocking functionality is often necessary for explicit control of multiple input/output stream synchronization or when audio must be synchronized with other system events. 
  - support dynamic connection of devices
  - provide extensive audio device parameter control
  - allow audio device capability probing
  - automatic internal conversion for data format, channel number compensation, (de)interleaving, and byte-swapping

 RtAudio incorporates the concept of audio streams, which represent audio output (playback) and/or input (recording).  Available audio devices and their capabilities can be enumerated and then specified when opening a stream.  Where applicable, multiple API support can be compiled and a particular API specified when creating an RtAudio instance.  See the \ref apinotes section for information specific to each of the supported audio APIs.

 FURTHER READING:

 For complete documentation on RtAudio, see the doc directory of the distribution or surf to http://music.mcgill.ca/~gary/rtaudio/.
 For complete documentation on RtAudio, see the doc directory of the distribution or surf to http://www.music.mcgill.ca/~gary/rtaudio/.


 LEGAL AND ETHICAL:

 The RtAudio license is similar to the the MIT License, with the added "feature" that modifications be sent to the developer.
 The RtAudio license is similar to the MIT License.

    RtAudio: a set of realtime audio i/o C++ classes
    Copyright (c) 2001-2005 Gary P. Scavone
    Copyright (c) 2001-2007 Gary P. Scavone

    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation files
@@ -52,8 +48,9 @@ The RtAudio license is similar to the the MIT License, with the added "feature"
    included in all copies or substantial portions of the Software.

    Any person wishing to distribute modifications to the Software is
    requested to send the modifications to the original developer so that
    they can be incorporated into the canonical version.
    asked to send the modifications to the original developer so that
    they can be incorporated into the canonical version.  This is,
    however, not a binding provision of this license.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
--- a/rtaudio-config.in
+++ b/rtaudio-config.in
@@ -0,0 +1,16 @@
 #! /bin/sh
 if (test "x$#" != "x1") ; then
  echo "Usage: $0 [--libs | --cxxflags]"
  exit;
 fi

 LIBRARY="@LIBS@ @frameworks@"
 CFLAGS="@audio_apis@"

 if (test "x$1" == "x--libs") ; then
  echo "$LIBRARY"
 elif (test "x$1" == "x--cflags") ; then
  echo "$CFLAGS"
 else
  echo "Unknown option: $1"
 fi
--- a/tests/Makefile.in
+++ b/tests/Makefile.in
@@ -1,6 +1,6 @@
 ### RtAudio tests Makefile - for various flavors of unix

 PROGRAMS = info play_saw record_raw in_out play_raw twostreams call_saw call_inout
 PROGRAMS = probe playsaw playraw record duplex testall
 RM = /bin/rm
 SRC_PATH = ../
 INCLUDE = ../
@@ -22,34 +22,29 @@ LIBRARY += @frameworks@

 all : $(PROGRAMS)

 info : info.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o info info.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)
 probe : probe.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o probe probe.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 play_saw : play_saw.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o play_saw play_saw.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)
 playsaw : playsaw.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o playsaw playsaw.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 play_raw : play_raw.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o play_raw play_raw.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)
 playraw : playraw.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o playraw playraw.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 record_raw : record_raw.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o record_raw record_raw.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)
 record : record.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o record record.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 in_out : in_out.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o in_out in_out.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)
 duplex : duplex.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o duplex duplex.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 twostreams : twostreams.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o twostreams twostreams.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)
 testall : testall.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o testall testall.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 call_saw : call_saw.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o call_saw call_saw.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 call_inout : call_inout.cpp $(OBJECTS)
 	$(CC) $(CFLAGS) $(DEFS) -o call_inout call_inout.cpp $(OBJECT_PATH)/RtAudio.o $(LIBRARY)

 clean : 
 	-rm $(OBJECT_PATH)/*.o
 	-rm $(PROGRAMS)
 	-rm -f *~
 	-rm -f *.raw *~

 strip : 
 	strip $(PROGRAMS)
--- a/tests/Windows/Debug/.placeholder
+++ b/tests/Windows/Debug/.placeholder
--- a/tests/Windows/Release/.placeholder
+++ b/tests/Windows/Release/.placeholder
--- a/tests/Windows/call_inout.dsp
+++ b/tests/Windows/call_inout.dsp
@@ -1,158 +0,0 @@
 # Microsoft Developer Studio Project File - Name="call_inout" - Package Owner=<4>
 # Microsoft Developer Studio Generated Build File, Format Version 6.00
 # ** DO NOT EDIT **

 # TARGTYPE "Win32 (x86) Console Application" 0x0103

 CFG=call_inout - Win32 Debug
 !MESSAGE This is not a valid makefile. To build this project using NMAKE,
 !MESSAGE use the Export Makefile command and run
 !MESSAGE 
 !MESSAGE NMAKE /f "call_inout.mak".
 !MESSAGE 
 !MESSAGE You can specify a configuration when running NMAKE
 !MESSAGE by defining the macro CFG on the command line. For example:
 !MESSAGE 
 !MESSAGE NMAKE /f "call_inout.mak" CFG="call_inout - Win32 Debug"
 !MESSAGE 
 !MESSAGE Possible choices for configuration are:
 !MESSAGE 
 !MESSAGE "call_inout - Win32 Release" (based on "Win32 (x86) Console Application")
 !MESSAGE "call_inout - Win32 Debug" (based on "Win32 (x86) Console Application")
 !MESSAGE 

 # Begin Project
 # PROP AllowPerConfigDependencies 0
 # PROP Scc_ProjName ""
 # PROP Scc_LocalPath ""
 CPP=cl.exe
 RSC=rc.exe

 !IF  "$(CFG)" == "call_inout - Win32 Release"

 # PROP BASE Use_MFC 0
 # PROP BASE Use_Debug_Libraries 0
 # PROP BASE Output_Dir "Release"
 # PROP BASE Intermediate_Dir "Release"
 # PROP BASE Target_Dir ""
 # PROP Use_MFC 0
 # PROP Use_Debug_Libraries 0
 # PROP Output_Dir ""
 # PROP Intermediate_Dir "Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
 # ADD CPP /nologo /MT /W3 /GX /O2 /I "../../" /D "NDEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "__WINDOWS_DS__" /D "__WINDOWS_ASIO__" /YX /FD /c
 # ADD BASE RSC /l 0x409 /d "NDEBUG"
 # ADD RSC /l 0x409 /d "NDEBUG"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
 # ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib dsound.lib /nologo /subsystem:console /machine:I386

 !ELSEIF  "$(CFG)" == "call_inout - Win32 Debug"

 # PROP BASE Use_MFC 0
 # PROP BASE Use_Debug_Libraries 1
 # PROP BASE Output_Dir "Debug"
 # PROP BASE Intermediate_Dir "Debug"
 # PROP BASE Target_Dir ""
 # PROP Use_MFC 0
 # PROP Use_Debug_Libraries 1
 # PROP Output_Dir ""
 # PROP Intermediate_Dir "Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
 # ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
 # ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I "../../" /D "_DEBUG" /D "WIN32" /D "_CONSOLE" /D "_MBCS" /D "__WINDOWS_DS__" /D "__WINDOWS_ASIO__" /D "__RTAUDIO_DEBUG__" /YX /FD /GZ /c
 # ADD BASE RSC /l 0x409 /d "_DEBUG"
 # ADD RSC /l 0x409 /d "_DEBUG"
 BSC32=bscmake.exe
 # ADD BASE BSC32 /nologo
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
 # ADD LINK32 dsound.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept

 !ENDIF 

 # Begin Target

 # Name "call_inout - Win32 Release"
 # Name "call_inout - Win32 Debug"
 # Begin Group "Source Files"

 # PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
 # Begin Source File

 SOURCE=..\..\asio\asio.cpp
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\asiodrivers.cpp
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\asiolist.cpp
 # End Source File
 # Begin Source File

 SOURCE=..\call_inout.cpp
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\iasiothiscallresolver.cpp
 # End Source File
 # Begin Source File

 SOURCE=..\..\RtAudio.cpp
 # End Source File
 # End Group
 # Begin Group "Header Files"

 # PROP Default_Filter "h;hpp;hxx;hm;inl"
 # Begin Source File

 SOURCE=..\..\asio\asio.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\asiodrivers.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\asiodrvr.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\asiolist.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\asiosys.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\ginclude.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\iasiodrv.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\asio\iasiothiscallresolver.h
 # End Source File
 # Begin Source File

 SOURCE=..\..\RtAudio.h
 # End Source File
 # End Group
 # Begin Group "Resource Files"

 # PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
 # End Group
 # End Target
 # End Project