public static StereoWaveFile OpenWave(string filename)
{
var wav = new StereoWaveFile();
var buffer = new byte[HEADER_SIZE];
wav.fs = File.OpenRead(filename);
// Read the WAV header.
wav.fs.Read(buffer, 0, 44);
int offset = 0;
byte[] arr2b = new byte[2];
byte[] arr4b = new byte[4];
wav.ChunkId = Encoding.ASCII.GetString(buffer, offset, 4);
wav.ChunkSize = BitConverter.ToInt32(buffer, offset += 4);
wav.Format = Encoding.ASCII.GetString(buffer, offset += 4, 4);
wav.Subchunk1ID = Encoding.ASCII.GetString(buffer, offset += 4, 4);
wav.Subchunk1Size = BitConverter.ToInt32(buffer, offset += 4); // 16 for PCM
wav.AudioFormat = BitConverter.ToInt16(buffer, offset += 4); // PCM = 1 (Linear Quantization);
wav.NumChannels = BitConverter.ToInt16(buffer, offset += 2);
wav.SampleRate = BitConverter.ToInt32(buffer, offset += 2);
wav.ByteRate = BitConverter.ToInt32(buffer, offset += 4); // SampleRate * NumChannels * BitsPerSample/8
wav.BlockAlign = BitConverter.ToInt16(buffer, offset += 4); // NumChannels * BitsPerSample/8
wav.BitsPerSample = BitConverter.ToInt16(buffer, offset += 2);
wav.Subchunk2ID = Encoding.ASCII.GetString(buffer, offset += 2, 4);
offset += 4;
wav.Subchunk2Size = BitConverter.ToInt32(buffer, offset);
wav.sampleBuffer = new byte[wav.BlockAlign];
return(wav);
}
static void SampleAverageMain(string[] args)
{
int sleft, sright;
var wav = StereoWaveFile.OpenWave(@"SDR_Sharp\SDRSharp_20160607_155903Z_315030000Hz_IQ.wav");
//var state = new SignalState();
int maxLeft = int.MinValue, maxRight = int.MinValue;
float avgLeft = 0, avgRight = 0;
int avgCount = 0;
long cnt = 0;
while (!wav.EOF)
{
wav.readSample(out sleft, out sright);
if (sleft > maxLeft)
{
maxLeft = sleft;
}
if (sright > maxRight)
{
maxRight = sright;
}
avgCount++;
avgLeft = ((avgLeft * avgCount - 1) + sleft) / avgCount;
avgRight = ((avgRight * avgCount) + sright) / avgCount;
//if(state.AddSample(sleft))
{
//Console.WriteLine("State Changed @ Sample {0} - Time: {1} - {2} - {3}", cnt, (float)cnt / (float)wav.SampleRate, Math.Round(state.lastRMS,4), Math.Round(state.lastAvgRMS,4));
//Console.WriteLine("State Changed @ Sample {0} - Time: {1} - {2} - {3} - {4}- {5} - {6}", cnt, (float)cnt / (float)wav.SampleRate, Math.Round(state.maxSample,4), Math.Round(state.minSample,4), state.waveMaxAverage, state.waveMinAverage, state.waveSampleCount);
}
cnt++;
if (cnt % 1000000 == 0)
{
Console.WriteLine("{0}/{1} - {2}%", wav.getFilePosition(), wav.getFileLength(), Math.Round(((float)wav.getFilePosition() / (float)wav.getFileLength()) * 100, 2));
}
}
Console.WriteLine("L: Max: {0}, Avg: {1}", maxLeft, avgLeft);
Console.WriteLine("R: Max: {0}, Avg: {1}", maxRight, avgRight);
Console.ReadLine();
}
static void Main(string[] args)
{
int sleft, sright;
var wav = StereoWaveFile.OpenWave(@"E:\SDR_Sharp\SDRSharp_20160607_155817Z_315030000Hz_IQ.wav");
//var state = new SignalState();
Filters.AnalogRMS <int> filterRMS = new Filters.AnalogRMS <int>()
{
RMSListSize = 500
};
Filters.ThresholdTrigger <double> filterTrigger = new Filters.ThresholdTrigger <double>()
{
Threshold = 5000, Tolerance = 500
};
long scount = 0;
while (!wav.EOF)
{
wav.readSample(out sleft, out sright);
filterRMS.SampleInput(sleft, scount);
if (filterRMS.HasOutput)
{
var rmsOut = filterRMS.SampleOutput();
if (scount % 1000000 == 0)
{
Console.WriteLine("Sample {0} - RMS Out: {1}", scount, rmsOut.value);
}
filterTrigger.SampleInput(rmsOut);
if (filterTrigger.HasOutput)
{
//Console.WriteLine("Sample {0} - TRIGGER ALERT: {1} - {2}", scount, filterTrigger.SampleOutput().value, rmsOut.value);
}
}
scount++;
}
Sample <bool> firstOfSet = null;
int stateCount = 0;
Sample <bool> s1 = null, s2 = null;
while (filterTrigger.HasOutput)
{
s2 = filterTrigger.SampleOutput();
if (firstOfSet == null)
{
firstOfSet = s2;
}
if (s1 != null)
{
if (s2.TimeOffset - s1.TimeOffset > 5000)
{
Console.WriteLine("Burst Time Span: {0}", (double)(s2.TimeOffset - firstOfSet.TimeOffset) / (double)wav.SampleRate);
Console.WriteLine("Time Span: {0} - {1}",
(double)firstOfSet.TimeOffset / (double)wav.SampleRate,
(double)s2.TimeOffset / (double)wav.SampleRate);
Console.WriteLine("Pulse Count: {0}", stateCount);
firstOfSet = null;
stateCount = 0;
}
else
{
stateCount++;
}
}
s1 = s2;
}
Console.ReadLine();
}
