[Stk] Segfault in SineWave.h

[Janosch.rux]

I tried to extract the relevant parts. The whole code is a hand tracking
example for the kinect device. In my opinion this is really messy but
actually I don't know how I could solve this in a more elegant way.

Thanks for your reply

Janosch Rux

See also: http://pastebin.com/7smzrQ02

###### Definition of args_struct

struct args_struct {
        stk::SineWave *sine;
        XnVPointDrawer *point;
};


#######Call in main.cpp:

        args_stk.point = g_pDrawer;

        //sound init get pointer to drawer
        status = pthread_create(&sig, NULL, audio, (void *)&args_stk);
        if(status != 0) {
                printf("Can't create thread\n");
                exit(EXIT_FAILURE);
        }

        pthread_detach(sig);

######## the thread function to init the stk

void *audio(void *arg) {

  RtAudio dac;
 struct args_struct *fuckit = (args_struct *) arg;
  fuckit->sine = new SineWave;

  // 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 *)fuckit);
  }
  catch ( RtError &error ) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

  fuckit->sine->setFrequency(440.0);

  try {
    dac.startStream();
  }
  catch ( RtError &error ) {
    error.printMessage();
    exit(EXIT_FAILURE);
  }

        while(1) {}

        return 0;
}

###### the tick() function

int tick( void *outputBuffer, void *inputBuffer, unsigned int nBufferFrames,
 double streamTime, RtAudioStreamStatus status, void *dataPointer )
{

struct args_struct *fuckit = (args_struct *)dataPointer;
register StkFloat *samples = (StkFloat *) outputBuffer;
fuckit->sine->setFrequency(fuckit->point->get_stk_freq());

//printf("Freq: %i\n", fuckit->point->get_stk_freq());

  for ( unsigned int i=0; i<nBufferFrames; i++ ) {
                *samples++ = fuckit->sine->tick();
        }

  return 0;
}


On 07.01.2011 20:47, Tristan Matthews wrote:
> 2011/1/7 Janosch.rux <janosch.rux at web.de <mailto:janosch.rux at web.de>>
>
>     Hi,
>
>     I use stk with callbacks to enhance another piece of software. Stk
>     is encapsulated in its own thread. If the tick function calls the
>     sine->tick() as in the example
>     (https://ccrma.stanford.edu/software/stk/crealtime.html) on the
>     web page I get a segfault on line 116 in SineWave.h.
>
>     Im not quite sure whether this is a bug or mistake on my side.
>
>
> Could you provide your code (or at least the relevant part)? Without
> seeing it, we can only hazard a guess as to what is going wrong.
>
> -t
>  
>
>
>     Thanks for any suggestions.
>
>     Regards
>
>     Janosch Rux
>
>     _______________________________________________
>     Stk mailing list
>     Stk at ccrma.stanford.edu <mailto:Stk at ccrma.stanford.edu>
>     http://ccrma-mail.stanford.edu/mailman/listinfo/stk
>
>
>
>
> -- 
> Tristan Matthews
> email: tristan at sat.qc.ca <mailto:tristan at sat.qc.ca>
> web: http://tristanswork.blogspot.com

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