beep.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <math.h>
   4
   5 #include <AL/al.h>
   6 #include <AL/alc.h>
   7
   8 int main() {
   9
  10         ALuint buffer;
  11         ALuint source;
  12         ALCdevice*  device;
  13         ALCcontext* context;
  14         int bufsize = 1000;
  15         unsigned char test[bufsize];
  16         int z;
  17         for(z = 0; z < bufsize; z++) {
  18                 test[z] = round(120*sin(z*(2*M_PI)/30.0)+128);
  19         }
  20         device = alcOpenDevice(NULL);
  21         context = alcCreateContext(device, NULL);
  22         alcMakeContextCurrent(context);
  23
  24         alGenBuffers(1, &buffer);
  25         alBufferData(buffer, AL_FORMAT_MONO8, test, bufsize, 11024);
  26         if (alGetError()) return 1;
  27
  28         alGenSources(1, &source);
  29
  30         alSourcef(source, AL_PITCH, 1.0);
  31         alSourcef(source, AL_GAIN, 1.0);
  32         alSourcei(source, AL_BUFFER, buffer);
  33         alSourcei(source, AL_LOOPING, AL_FALSE);
  34         alSourcei(source, AL_BUFFER, buffer);
  35         if (alGetError()) return 1;
  36
  37         alSourcePlay(source);
  38         if (alGetError()) return 1;
  39
  40         sleep(1);
  41         alSourceStop(source);
  42
  43         alDeleteSources(1, &source);
  44         alDeleteBuffers(1, &buffer);
  45
  46         alcMakeContextCurrent(NULL);
  47
  48         alcDestroyContext(context);
  49         alcCloseDevice(device);
  50
  51         return 0;
  52
  53 }