static void DemoMozart()
{
var spec = new Spectrogram.Spectrogram(sampleRate: 8000, fftSize: 2048, step: 700);
float[] values = Spectrogram.Tools.ReadWav("mozart.wav");
spec.AddExtend(values);
Bitmap bmp = spec.GetBitmap(intensity: 2, freqHigh: 2500);
spec.SaveBitmap(bmp, "mozart.jpg");
}
public static Bitmap GetVerticalScale(int width, Spectrogram.Spectrogram spec, int offsetFromZeroHz = 0, int offsetHz = 0, int reduction = 1)
{
int majorTickHz = 50;
int majorTickLength = 4;
int minorTickHz = 10;
int minorTickLength = 1;
Bitmap bmp = new Bitmap(width, spec.Height / reduction);
using (var gfx = Graphics.FromImage(bmp))
using (var pen = new Pen(Color.Black))
using (var brush = new SolidBrush(Color.Black))
using (var font = new Font(FontFamily.GenericMonospace, 10))
using (var sf = new StringFormat()
{
LineAlignment = StringAlignment.Center
})
{
gfx.Clear(Color.White);
List <double> freqsMajor = new List <double>();
for (double f = spec.FreqMin; f <= spec.FreqMax; f += majorTickHz)
{
freqsMajor.Add(f);
}
List <double> freqsMinor = new List <double>();
for (double f = spec.FreqMin; f <= spec.FreqMax; f += minorTickHz)
{
freqsMinor.Add(f);
}
// don't show first or last major tick
if (freqsMajor.Count >= 2)
{
freqsMajor.RemoveAt(0);
freqsMajor.RemoveAt(freqsMajor.Count - 1);
}
foreach (var freq in freqsMajor)
{
int y = spec.PixelY(freq + offsetHz) / reduction;
gfx.DrawLine(pen, 0, y, majorTickLength, y);
gfx.DrawString($"{freq + offsetFromZeroHz:N0} Hz", font, brush, majorTickLength, y, sf);
}
foreach (var freq in freqsMinor)
{
int y = spec.PixelY(freq + offsetHz) / reduction;
gfx.DrawLine(pen, 0, y, minorTickLength, y);
}
}
return(bmp);
}
static void DemoQRSS()
{
var spec = new Spectrogram.Spectrogram(sampleRate: 8000, fftSize: 16384, step: 8000);
float[] values = Spectrogram.Tools.ReadMp3("qrss-w4hbk.mp3");
spec.AddExtend(values);
Bitmap bmp = spec.GetBitmap(intensity: 1.5, freqLow: 1100, freqHigh: 1500,
showTicks: true, tickSpacingHz: 50, tickSpacingSec: 60);
spec.SaveBitmap(bmp, "qrss.png");
}
public void StartListening(int deviceIndex = 0, int sampleRate = 8000, int fftSize = 1024)
{
spec = new Spectrogram.Spectrogram(sampleRate, fftSize, 250);
int bitRate = 16;
int channels = 1;
int bufferMilliseconds = 10;
wvin = new NAudio.Wave.WaveInEvent();
wvin.DeviceNumber = deviceIndex;
wvin.WaveFormat = new NAudio.Wave.WaveFormat(sampleRate, bitRate, channels);
wvin.DataAvailable += OnDataAvailable;
wvin.BufferMilliseconds = bufferMilliseconds;
wvin.StartRecording();
}
private static void CreateSpectrogram(string fileName)
{
var spectrogramName = fileName.Substring(0, fileName.Length - 4) + "-spectro.jpg";
if (File.Exists(spectrogramName))
{
return;
}
var spec = new Spectrogram.Spectrogram(sampleRate: 8000, fftSize: 2048, step: 700);
float[] values = Spectrogram.Tools.ReadWav(fileName);
spec.AddExtend(values);
var bitmap = spec.GetBitmap(intensity: 2, freqHigh: 2500);
spec.SaveBitmap(bitmap, spectrogramName);
}
private void AudioMonitorInitialize(
int DeviceIndex = 0,
int sampleRate = 8000,
int bitRate = 16,
int channels = 1,
int bufferMilliseconds = 10,
int fftSize = 1024,
int step = 250
)
{
spec = new Spectrogram.Spectrogram(sampleRate, fftSize, step);
wvin = new NAudio.Wave.WaveInEvent();
wvin.DeviceNumber = DeviceIndex;
wvin.WaveFormat = new NAudio.Wave.WaveFormat(sampleRate, bitRate, channels);
wvin.DataAvailable += OnDataAvailable;
wvin.BufferMilliseconds = bufferMilliseconds;
wvin.StartRecording();
}
static void DemoHal()
{
var spec = new Spectrogram.Spectrogram(sampleRate: 15000, fftSize: 4096, step: 400);
float[] values = Spectrogram.Tools.ReadMp3("cant-do-that.mp3");
spec.AddExtend(values);
Bitmap bmp;
bmp = spec.GetBitmap(intensity: .2, freqHigh: 1000);
spec.SaveBitmap(bmp, "cant-do-that.jpg");
bmp = spec.GetBitmap(intensity: .2, freqHigh: 1000,
colormap: Spectrogram.Colormap.grayscale);
spec.SaveBitmap(bmp, "cant-do-that-grayscale.jpg");
bmp = spec.GetBitmap(intensity: .2, freqHigh: 1000,
colormap: Spectrogram.Colormap.grayscaleInverted);
spec.SaveBitmap(bmp, "cant-do-that-grayscale-inverted.jpg");
bmp = spec.GetBitmap(intensity: .2, freqHigh: 1000,
colormap: Spectrogram.Colormap.vdGreen);
spec.SaveBitmap(bmp, "cant-do-that-green.jpg");
}
/*static void DemoMozart()
* {
* var spec = new Spectrogram.Spectrogram(sampleRate: 8000, fftSize: 2048, step: 700);
* float[] values = Spectrogram.Tools.ReadWav("mozart.wav");
* spec.AddExtend(values);
* int [] detectedFrec = Spectrogram.Tools.LoadDetectedFrec("data.bin", spec.displaySettings.fftResolution);
* spec.AddDetectedFrec(detectedFrec);
* Bitmap bmp = spec.GetBitmap(intensity: 2, freqHigh: 2500, showTicks: true);
* spec.SaveBitmap(bmp, "mozart.jpg");
* }*/
static void DemoKike()
{
string name = "440";
int fs = 48000, fft_size = 2048, frec_high = 2000;
int height = frec_high * fft_size / fs;
double scaler = (double)frec_high / (double)height;
float[] values_in = Spectrogram.Tools.ReadWav(name + ".wav");
float[] values_out = Spectrogram.Tools.ReadWav(name + "_det.wav");
int[] detectedFrec_v2 = Spectrogram.Tools.LoadDetectedFrec(name + "_freq_det.bin", scaler);
int[] objectiveFrec_v2 = Spectrogram.Tools.LoadDetectedFrec(name + "_freq_obj.bin", scaler);
var spec_in_v2 = new Spectrogram.Spectrogram(sampleRate: fs, fftSize: fft_size, step: 2048);
var spec_out_v2 = new Spectrogram.Spectrogram(sampleRate: fs, fftSize: fft_size, step: 2048);
spec_in_v2.AddExtend(values_in);
spec_out_v2.AddExtend(values_out);
spec_in_v2.AddDetectedFrec(detectedFrec_v2);
spec_out_v2.AddDetectedFrec(detectedFrec_v2);
spec_in_v2.AddObjectiveFrec(objectiveFrec_v2);
spec_out_v2.AddObjectiveFrec(objectiveFrec_v2);
Bitmap bmp_in_v2 = spec_in_v2.GetBitmap(intensity: 2, freqHigh: frec_high, showTicks: true, colormap: Spectrogram.Colormap.grayscale);
Bitmap bmp_out_v2 = spec_out_v2.GetBitmap(intensity: 2, freqHigh: frec_high, showTicks: true, colormap: Spectrogram.Colormap.grayscale);
spec_in_v2.SaveBitmap(bmp_in_v2, name + "_v2.jpg");
spec_out_v2.SaveBitmap(bmp_out_v2, name + "_out_v2.jpg");
}
public FormBrightness(Spectrogram.Spectrogram spec)
{
InitializeComponent();
this.spec = spec;
}
public FormFreqRange(Spectrogram.Spectrogram spec)
{
InitializeComponent();
this.spec = spec;
LoadSettings();
}
public static void Spectrogram(
Spectrogram.Spectrogram spec, WsprBand band, List <WsprSpot> spots,
Bitmap bmpSpectrogram, Bitmap bmpVericalScale,
bool drawBandLines, bool drawVerticalLine, ProgramSettings settings)
{
using (Graphics gfx = Graphics.FromImage(bmpSpectrogram))
using (Bitmap bmpIndexed = spec.GetBitmapMax(settings.brightness, reduction: settings.verticalReduction, roll: settings.roll))
using (Pen bandEdgePen = new Pen(Color.White)
{
DashStyle = System.Drawing.Drawing2D.DashStyle.Dash
})
using (Pen grabEdgePen = new Pen(Color.Yellow)
{
DashStyle = System.Drawing.Drawing2D.DashStyle.Dash
})
using (Pen rollPen = new Pen(Color.White))
using (var font = new Font("consolas", 10, FontStyle.Bold))
using (var sfMiddleCenter = new StringFormat {
LineAlignment = StringAlignment.Center, Alignment = StringAlignment.Center
})
using (var sfUpperLeft = new StringFormat {
LineAlignment = StringAlignment.Near, Alignment = StringAlignment.Near
})
{
// copy source bitmaps onto this display bitmap
gfx.DrawImage(bmpIndexed, 0, 0);
gfx.DrawImage(bmpVericalScale, spec.Width, 0);
int wsprBandTopPx = spec.PixelY(band.upperFreq - band.dialFreq, settings.verticalReduction) + 1;
int wsprBandBottomPx = spec.PixelY(band.lowerFreq - band.dialFreq, settings.verticalReduction) + 1;
int qrssBandBottomPx = spec.PixelY(band.lowerFreq - band.dialFreq - 200, settings.verticalReduction) + 1;
int grabTopPx = wsprBandTopPx - settings.grabSavePxAbove;
int grabBotPx = qrssBandBottomPx + settings.grabSavePxBelow;
if (drawBandLines)
{
gfx.DrawLine(bandEdgePen, 0, wsprBandTopPx, spec.Width, wsprBandTopPx);
gfx.DrawLine(bandEdgePen, 0, wsprBandBottomPx, spec.Width, wsprBandBottomPx);
gfx.DrawLine(bandEdgePen, 0, qrssBandBottomPx, spec.Width, qrssBandBottomPx);
gfx.DrawLine(grabEdgePen, 0, grabTopPx - 1, spec.Width, grabTopPx - 1);
gfx.DrawLine(grabEdgePen, 0, grabBotPx, spec.Width, grabBotPx);
}
if (settings.roll && drawVerticalLine)
{
gfx.DrawLine(rollPen, spec.NextColumnIndex, 0, spec.NextColumnIndex, spec.Height);
}
if (settings.isWsprEnabled == false)
{
return;
}
// plot spots in a single segment (the 2m block within a 10m time frame)
for (int segment = 0; segment < 5; segment++)
{
WsprSpot[] segmentSpots = spots
.Where(x => x.segment == segment) // only this segment
.Where(x => Math.Abs(x.frequencyHz - band.dialFreq) < 1e5) // only this band
.OrderBy(x => x.strength).GroupBy(x => x.callsign).Select(x => x.Last()) // only strongest
.OrderBy(x => x.frequencyHz).Reverse().ToArray(); // top to bottom
int segmentX = spec.Width * segment / 5;
if (settings.roll == false && segmentSpots.Length > 0)
{
segmentX = (int)(spec.Width - segmentSpots[0].ageSec / spec.SecPerPx) + 10;
}
for (int spotIndex = 0; spotIndex < segmentSpots.Length; spotIndex++)
{
WsprSpot spot = segmentSpots[spotIndex];
int r = 7;
int y = spec.PixelY(spot.frequencyHz - band.dialFreq, settings.verticalReduction);
// draw the marker
if (spot.isWspr)
{
int xSpot = segmentX + r * 2 * (spotIndex % 8 + 1);
// determine where to place the marker
gfx.FillEllipse(Brushes.Black, xSpot - r, y - r, r * 2, r * 2);
gfx.DrawString($"{spotIndex + 1}", font, Brushes.White, xSpot + 0.5f, y + 1, sfMiddleCenter);
// draw the key label at the top of the band edge
DrawStringWithShadow(gfx, $"{spotIndex + 1}: {spot.callsign} ({spot.strength} dB) ",
segmentX, wsprBandTopPx - settings.grabSavePxAbove + 13 * spotIndex,
font, sfUpperLeft, Brushes.White, Brushes.Black);
}
else
{
// draw the callsign exactly where the spot is on the spectrogram
int xSpot = (int)(segmentX + (spot.dt.Minute % 2 * 60 + spot.dt.Second) / spec.SecPerPx);
DrawStringWithShadow(gfx, spot.callsign, xSpot, y, font, sfUpperLeft, Brushes.White, Brushes.Black);
}
}
}
}
}
public FormFFT(Spectrogram.Spectrogram spec)
{
InitializeComponent();
this.spec = spec;
}