views.cpp

声卡的数据分析,用于采集声卡的数据进行分析

#include "views.h"
#include "canvas.h"
#include "fft.h"
#include "recorder.h"

COLORREF MapColor (int s)
{
    if ( s < 16 )
        return RGB(0, 0, 128);
    else if ( s < 32)
        return RGB(0, 0, 255);
    else if ( s < 64 )
        return RGB(0, 255, 0);
    else if ( s < 128)
        return RGB(255, 255, 0);
    else if ( s < 256 )
        return RGB(255, 128, 0);
    else
        return RGB(255, 0, 0);
}

void ViewFreq::Clear ()
{
    if (Hwnd ())
    {
        UpdateCanvas canvas (Hwnd ());
        ClientRect rect (Hwnd ());
        canvas.ClearBlack(rect);
    }
}

void ViewFreq::Update (Fft const &fftTransformer)
{
    UpdateCanvas canvas (Hwnd ());
    ClientRect rect (Hwnd ());

    {
        // Erase background for current spectrum
        BlackPen pen(canvas);
        canvas.Line (_xRecord, 0, _xRecord, rect.bottom);
        canvas.Line (_xRecord + 1, 0, _xRecord + 1, rect.bottom);
    }

    for (int i = 0; 
             i < fftTransformer.Points() / 2 && i < rect.bottom; 
             i++ )
    {
        int s = int (fftTransformer.GetIntensity(i) / 256);
        
        COLORREF color;
        if (s > 8)
        {
            color = MapColor (s);

            canvas.Point (_xRecord, rect.bottom - i - 1, color);
            canvas.Point (_xRecord + 1, rect.bottom - i - 1, color);
        }
    }

    _xRecord += 2;
    if (_xRecord >= rect.right)
        _xRecord = 0;

    {
        // Draw white vertical mark
        WhitePen pen(canvas);
        canvas.Line (_xRecord, 0, _xRecord, rect.bottom);
    }
}

void ViewFreq::Fake ()
{
    UpdateCanvas canvas (Hwnd ());
    ClientRect rect (Hwnd ());

    {
        // Erase background for current spectrum
        BlackPen pen(canvas);
        canvas.Line (_xRecord, 0, _xRecord, rect.bottom);
        canvas.Line (_xRecord + 1, 0, _xRecord + 1, rect.bottom);
    }


    _xRecord += 2;
    if (_xRecord >= rect.right)
        _xRecord = 0;

    {
        // Draw white vertical mark
        WhitePen pen(canvas);
        canvas.Line (_xRecord, 0, _xRecord, rect.bottom);
    }
}

void ViewWave::Update (Fft const &fftTransformer)
{
    UpdateCanvas canvas (Hwnd ());
    ClientRect rect (Hwnd ());
    canvas.ClearBlack(rect);
    int cMaxPoints = min (fftTransformer.Points(), _poly.Points());
    for ( int i = 0; i < cMaxPoints; i++ )
    {
        int s  = fftTransformer.Tape(i) / 512 + (rect.bottom - 1) / 2;
		
		//反相的
	    int ns = -fftTransformer.Tape(i) / 512 + (rect.bottom - 1) / 2;

        if (i >= rect.right)
        {
            _poly.Add( i, rect.right - 1, (rect.bottom - 1) / 2);
        }
        else
        {
            if ( s < 0 )
			{
                _poly.Add (i, i, 0);							
			}
            else if (s >= rect.bottom)
			{
                _poly.Add (i, i, rect.bottom - 1);				
			}
            else
			{
                _poly.Add (i, i, s);				
			}

		


        }
    }

    PenHolder pen (canvas, _penGreen);	
    _poly.Paint (canvas, cMaxPoints);	
}