ToneGenerator
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Revision as of 23:42, 16 August 2007 by Ghoulsblade (Talk | contribs)
openal : tone generator :
void cSoundSourceStream::StreamBuffer(ALuint buffer){
int size = STREAM_BUFFER_SIZE;
//int copied = mpStream->FillBuffer(b, size);
int copied = size;
int iTestTone = 16; // lower number = higher tone
for (int i=0;i<size/4;++i) {
float mysin = sin(float(i)/float(iTestTone));
signed short s = (signed short)( mysin * 0x1fff );
((signed short*)b)[i*2+0] = s;
((signed short*)b)[i*2+1] = s;
}
//for(int i=0;i<128;++i)printf("%i ",b[i]);printf("\n");
printf("copied=%i iTestTone=%d,freq=%i GetFrameSize=%d GetBitrate=%d GetChannels=%d\n",copied,iTestTone,(int)mpStream->GetFrequency(),(int)mpStream->GetFrameSize(),(int)mpStream->GetBitrate(),(int)mpStream->GetChannels());
alBufferData(buffer, miBufferFormat, b, copied, mpStream->GetFrequency());
CheckOpenAl();
}
output : copied=65536 iTestTone=12,freq=44100 GetFrameSize=4 GetBitrate=16 GetChannels=2
