void analize_dtfm(string filename)
{
try
{
using (var waveFile = new WaveFileReader(filename))
//using (var waveFile = new WaveFileReader("dtmf_sample.wav"))
{
foreach (var occurence in waveFile.DtmfTones())
{
string text = String.Format("TotalSeconds :{0:0.00} Key:{1} Duration:{2:0.000}",
occurence.Position.TotalSeconds, occurence.DtmfTone.Key, occurence.Duration.TotalSeconds);
listBox1.Items.Add(text);
PhoneKey key = occurence.DtmfTone.Key;
listBox1.Items.Add(key.ToString());
listBox1.Items.Add(occurence.DtmfTone.ToString());
listBox1.Items.Add(occurence.DtmfTone.LowTone.ToString());
listBox1.Items.Add(occurence.DtmfTone.HighTone.ToString());
////listBox1.Items.Add( $"{occurence.Position.TotalSeconds:00.000} s: "
//// + $"{occurence.DtmfTone.Key} key "
//// + $"(duration: {occurence.Duration.TotalSeconds:00.000} s)");
////Console.WriteLine($"{occurence.Position.TotalSeconds:00.000} s: "
//// + $"{occurence.DtmfTone.Key} key "
//// + $"(duration: {occurence.Duration.TotalSeconds:00.000} s)");
}
}
}
catch (SystemException exc)
{
MessageBox.Show("Please select WAV file");
}
}
/// <summary>Creates a new `DtmfChange` with the given identification and location.</summary> /// <param name="key">The key of the DTMF tone.</param> /// <param name="position">The position of the DTMF tone inside the audio data.</param> /// <param name="channel">The audio channel of the DTMF tone.</param> /// <param name="isStart">Indicates whether a DMTF tone started or stopped at the current position.</param> public DtmfChange(PhoneKey key, TimeSpan position, int channel, bool isStart) => (Key, Position, Channel, IsStart) = (key, position, channel, isStart);
public static float[] DtmfToneBlock(PhoneKey k) => Generate(k).FirstBlock();
/// <summary>Converts a `PhoneKey` to the two frequencies it is encoded with in audio data.</summary> /// <param name="key">The key to convert.</param> /// <returns>A `ValueTuple` holding the key's high frequency in the first position and its low frequency in the second position.</returns> public static (int high, int low) ToDtmfTone(this PhoneKey key) => key switch
public DtmfTone(int highTone, int lowTone, PhoneKey key)
{
HighTone = highTone;
LowTone = lowTone;
Key = key;
}
/// <summary>Creates a new `DtmfTone` with the given identification and location.</summary> /// <param name="key">The key of the DTMF tone.</param> /// <param name="position">The position of the DTMF tone inside the audio data.</param> /// <param name="duration">The length of the DTMF tone.</param> /// <param name="channel">The audio channel of the DTMF tone.</param> public DtmfTone(PhoneKey key, TimeSpan position, TimeSpan duration, int channel) => (Key, Position, Duration, Channel) = (key, position, duration, channel);
public static DtmfChange Stop(PhoneKey k, int channel = 0) => DtmfChange.Stop(k, new TimeSpan(), channel);
/// <summary>Generates single-channel PCM data playing the DTMF tone `key` infinitely.</summary> /// <param name="key">The DTMF tone to generate.</param> /// <param name="sampleRate">Optional sample rate of the PCM data. Defaults to `Config.DefaultSampleRate`.</param> /// <returns>An infinite sequence of PCM data playing the specified DMTF tone.</returns> public static IEnumerable <float> Generate(PhoneKey key, int sampleRate = Config.DefaultSampleRate) => Generate(key.ToDtmfTone(), sampleRate);
