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CppStkExample1.md

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(C++) StkExample1

 

C++11STLQt CreatorLubuntu

 

STK example 1: beep is an STK example that generates a beep. The code was copied from https://ccrma.stanford.edu/software/stk/crealtime.html.

 

Note that original copy-pasted code resulted in multiple compile warnings and that the library style, design and example code looks different from the experts' recommendations

Technical facts

 

Operating system(s) or programming environment(s)

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Project type:

C++ standard:

Compiler(s):

Libraries used:

  • STL STL: GNU ISO C++ Library, version 4.9.2

 

 

 

 

 

Qt project file: ./CppStkExample1/CppStkExample1.pro

 

include(../../ConsoleApplication.pri) #Or use the code below # QT += core # QT += gui # greaterThan(QT_MAJOR_VERSION, 4): QT += widgets # CONFIG   += console # CONFIG   -= app_bundle # TEMPLATE = app # CONFIG(release, debug|release) { #   DEFINES += NDEBUG NTRACE_BILDERBIKKEL # } # QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++ # unix { #   QMAKE_CXXFLAGS += -Werror # } include(../../Libraries/Boost.pri) #Or use the code below # win32 { #   INCLUDEPATH += \ #     ../../Libraries/boost_1_54_0 # } # Install STK by: # sudo apt-get install libstk0-dev include(../../Libraries/Stk.pri) #Or use the code below # INCLUDEPATH += /usr/include/stk # LIBS += -L/usr/lib -lstk -lrtaudio SOURCES += main.cpp

 

 

 

 

 

./CppStkExample1/main.cpp

 

// crtsine.cpp STK tutorial program #pragma GCC diagnostic push // I (RJCB) wish I did not need to add these ignores... #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #pragma GCC diagnostic ignored "-Wunused-variable" #pragma GCC diagnostic ignored "-Wunused-parameter" #include "SineWave.h" #include "RtAudio.h" using namespace stk; // This tick() function handles sample computation only. It will be // called automatically when the system needs a new buffer of audio // samples. int tick( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,          double streamTime, RtAudioStreamStatus status, void *dataPointer ) {   SineWave *sine = (SineWave *) dataPointer;   register StkFloat *samples = (StkFloat *) outputBuffer;   for ( unsigned int i=0; i<nBufferFrames; i++ )     *samples++ = sine->tick();   return 0; } int main() {   // Set the global sample rate before creating class instances.   Stk::setSampleRate( 44100.0 );   SineWave sine;   RtAudio dac;   // Figure out how many bytes in an StkFloat and setup the RtAudio stream.   RtAudio::StreamParameters parameters;   parameters.deviceId = dac.getDefaultOutputDevice();   parameters.nChannels = 1;   RtAudioFormat format = ( sizeof(StkFloat) == 8 )     ? RTAUDIO_FLOAT64 : RTAUDIO_FLOAT32;   unsigned int bufferFrames = RT_BUFFER_SIZE;   try {     dac.openStream( &parameters, NULL, format,       (unsigned int)Stk::sampleRate(),       &bufferFrames, &tick, (void *)&sine );   }   catch ( RtError &error ) {     error.printMessage();     goto cleanup;   }   sine.setFrequency(440.0);   try {     dac.startStream();   }   catch ( RtError &error ) {     error.printMessage();     goto cleanup;   }   // Block waiting here.   char keyhit;   std::cout << "\nPlaying ... press <enter> to quit.\n";   std::cin.get( keyhit );   // Shut down the output stream.   try {     dac.closeStream();   }   catch ( RtError &error ) {     error.printMessage();   }   cleanup:   return 0; } #pragma GCC diagnostic pop