// Test between 20Hz and 500Hz. This works very well, although it is hard to eliminate octave errors
// This test will play original, then a sine at the frequency it detected. The two should line up.
private static void pitchdetectwav(AudioPlayer pl, string strFilename, PitchDetection.PitchDetectAlgorithm algorithm)
{
string strInstdir = mediadir + @"pitchdetect\";
WaveAudio w = new WaveAudio(strInstdir + strFilename);
if (w.getNumChannels() != 1)
{
w.setNumChannels(1, true);
}
double dfreq = PitchDetection.DetectPitch(w, 50, 500, algorithm);
WaveAudio testPitch = new Triangle(dfreq, 0.7).CreateWaveAudio(1.0);
pl.Play(w);
pl.Play(testPitch);
}
static void iotests_perfile(string strFilename, int nBits, int nChannels, int nRate)
{
WaveAudio w01 = new WaveAudio(strFilename);
asserteq(w01.getNumChannels(), nChannels);
asserteq(w01.getSampleRate(), nRate, "011");
asserteqf(w01.LengthInSamples, 90725 * (nRate / 22050), 1.0, "012"); //note give 1.0 tolerance
asserteqf(w01.LengthInSeconds, 4.1145124, "013");
asserteq(w01.data.Length, nChannels);
asserteq(w01.data[0].Length, w01.LengthInSamples);
for (int i = 0; i < nChannels; i++)
{
asserteq(w01.data[i].Length, w01.LengthInSamples);
}
// test converting to other rates / quality
w01.SaveWaveFile(mediadir + "ttout\\o_" + nRate + "_" + nBits + "_" + nRate + "_" + nChannels + ".wav", nBits);
nBits = (nBits == 8) ? 16 : 8;
w01.SaveWaveFile(mediadir + "ttout\\ot_" + nRate + "_" + nBits + "_" + nRate + "_" + nChannels + ".wav", nBits);
}
public WaveAudio Generate(double timeScale, int timeShift)
{
if (wLast != null && timeScale == this.timeScaleLast && timeShift == this.timeShiftLast && !bNeedUpdate)
{
return(wLast);
}
WaveAudio w = wInput.Clone();
for (int ch = 0; ch < w.getNumChannels(); ch++)
{
for (int i = 0; i < w.data[ch].Length; i++)
{
w.data[ch][i] = w.data[ch][i] + w.data[ch][((int)(i * timeScale) + timeShift) % w.data[ch].Length];
}
}
this.timeScaleLast = timeScale;
this.timeShiftLast = timeShift;
this.wLast = w;
this.bNeedUpdate = false;
return(w);
}
public static void propertytests()
{
// these aren't the best tests.
WaveAudio w1 = new WaveAudio(44100, 2);
asserteq(w1.data.Length, 2, "channels");
asserteq(w1.getNumChannels(), 2, "channels");
assert(w1.data[0] != null && w1.data[1] != null, "channels");
assert(w1.data[0].Length == 1 && w1.data[1].Length == 1, "004");
asserteq(w1.getSampleRate(), 44100, "005");
WaveAudio w1m = new WaveAudio(22050, 1);
asserteq(w1m.data.Length, 1, "channels");
assert(w1m.data[0] != null, "channels");
asserteq(w1m.data[0].Length, 1, "004");
asserteq(w1m.getSampleRate(), 22050, "005");
// now set some properties
w1m.LengthInSamples = 100;
asserteq(w1m.data[0].Length, 100);
asserteqf(w1m.LengthInSeconds, 100 / (double)w1m.getSampleRate(), 0.001);
}
