//Va a generar una señal con una frecuencia de 440 y la guardara en un wav
private void btnCrearFrecuencia_Click(object sender, RoutedEventArgs e)
{
var sampleRate = 44100;
var channelCount = 1;
var signalGenerator = new SignalGenerator(sampleRate, channelCount);
signalGenerator.Type = SignalGeneratorType.Sin;
signalGenerator.Frequency = 440;
signalGenerator.Gain = 0.5;
var waveFormat = new WaveFormat(sampleRate, 16, channelCount);
var writer = new CueWaveFileWriter("tono.wav", waveFormat);
var muestrasPorSegundo = sampleRate * channelCount;
var buffer = new float[muestrasPorSegundo];
for (int i = 0; i < 5; i++)
{
var muestras = signalGenerator.Read(buffer, 0, muestrasPorSegundo);
writer.WriteSamples(buffer, 0, muestras);
}
writer.Dispose();
}
public int Read(float[] buffer, int offset, int count)
{
if (started)
{
int sampleRead = signalGenerator.Read(buffer, offset, count);
return sampleRead;
}
return 0;
}
private void FillTable(SignalGeneratorType signalGeneratorType)
{
waveTable = new float[(int)sampleRate];
var sigGen = new SignalGenerator(44100, 1)
{
Frequency = 1, Gain = 1, Type = signalGeneratorType
};
sigGen.Read(waveTable, 0, (int)sampleRate);
// debug
System.Diagnostics.Debug.WriteLine(String.Format("start: {0}, mid: {1}, end: {2}", waveTable[0], waveTable[(int)((sampleRate / 2))], waveTable[(int)sampleRate - 1]));
readPosition = 0;
}
public int Read(float[] buffer, int offset, int count)
{
var samples = _source.Read(buffer, offset, count);
var lfoBuffer = new float[count];
_lfo.Read(lfoBuffer, offset, count);
for (int i = 0; i < samples; i++)
{
if (_lfo.Gain > 0.0f)
{
buffer[offset + i] += buffer[offset + i] * lfoBuffer[offset + i];
}
}
return(samples);
}
//Va a generar una señal con una frecuencia de 440
//y la guardara en un wav
private void btnCrearFrecuencia_Click(object sender, RoutedEventArgs e)
{
var sampleRate = 44100;
var channelCount = 1;
var signalGenerator = new SignalGenerator(sampleRate, channelCount);
signalGenerator.Type = SignalGeneratorType.Sin;
signalGenerator.Frequency = Int32.Parse(txtFrecuencia.Text);
signalGenerator.Gain = 0.5; //ganancia = toma la amplitud maxima
var waveFormat = new WaveFormat(sampleRate, 16, channelCount);
var writer = new WaveFileWriter(txtNombreArchivo.Text, waveFormat);
var muestrasPorSegundo = sampleRate * channelCount;
var buffer = new float[muestrasPorSegundo];
for (int i = 0; i < Int32.Parse(txtSegundos.Text); i++)
{
var muestras = signalGenerator.Read(buffer, 0, muestrasPorSegundo);
writer.WriteSamples(buffer, 0, muestras);
}
writer.Dispose();
}
/// <summary>
/// Sends a sample from a signal generator generated waveform.
/// </summary>
private void SendSignalGeneratorSample(object state)
{
lock (_audioStreamTimer)
{
int inputBufferSize = RTP_TIMESTAMP_RATE / 1000 * AUDIO_SAMPLE_PERIOD_MILLISECONDS;
int outputBufferSize = RTP_TIMESTAMP_RATE / 1000 * AUDIO_SAMPLE_PERIOD_MILLISECONDS;
// Get the signal generator to generate the samples and then convert from
// signed linear to PCM.
float[] linear = new float[inputBufferSize];
_signalGenerator.Read(linear, 0, inputBufferSize);
short[] pcm = linear.Select(x => (short)(x * 32767f)).ToArray();
byte[] encodedSample = new byte[outputBufferSize];
for (int index = 0; index < inputBufferSize; index++)
{
encodedSample[index] = MuLawEncoder.LinearToMuLawSample(pcm[index]);
}
_peerConnection.SendAudioFrame((uint)outputBufferSize, _peerConnection.GetSendingFormat(SDPMediaTypesEnum.audio).FormatCodec.GetHashCode(), encodedSample);
}
}
public int Read(float[] buffer, int offset, int count)
{
return(FSigGen.Read(buffer, offset, count));
}
public int Read(float[] buffer, int offset, int count)
{
return(_useRead ? _signalrGenerator.Read(buffer, offset, count) : 0);
}