Spec/WaveWin.cpp at master · mdaskalov/Spec · GitHub

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// wavewin.cpp : implementation file
//

#include "stdafx.h"
#include "wavewin.h"
#include <math.h>

extern PBYTE gWave;
extern int   gPlaying; // 0=Stop, 1=Record, 2=Test
extern BYTE  gStaticWave[MAXWAVE + 1];  // Static wave buffer

/////////////////////////////////////////////////////////////////////////////
// CWaveWin

CWaveWin::CWaveWin()
{
	m_WaveWinDC = NULL;
}

CWaveWin::~CWaveWin()
{
	gPlaying = 0;
}


BEGIN_MESSAGE_MAP(CWaveWin, CStatic)
	//{{AFX_MSG_MAP(CWaveWin)
	ON_WM_PAINT()
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


void CWaveWin::InitWave()
{
	if (m_WaveWinDC != NULL) {
		delete m_WaveWinDC;
	}

	m_WaveWinDC = new CWindowDC(this);

	CRect rect;
	GetClientRect(&rect);

	double waveyl = rect.Height();

	for (int i = 0;i <= 255;i++)
		m_cWaveY[i] = (int)(waveyl - (i / (256.0 / (double)(waveyl - 2))));

	ClearWave();
}

void CWaveWin::ClearWave()
{
	for (int i = 0;i < MAXWAVE + 1;i++) {
		gWave[i] = 0x7f;
		m_oWave[i] = 0x80;
	}
}

void CWaveWin::GenerateWave(double x)
{
	double Step = MAXWAVE / 2.0*3.1415926 / x;

	for (int i = 0;i < MAXWAVE + 1;i++) {
		gWave[i] = (BYTE)(128 * sin(i / Step)) - 0x80;

		if (gWave[i] > 0xFF) gWave[i] = 0xFF;
	}
}

void CWaveWin::DrawWave()
{
	register unsigned char x, y, o, m;

	if (!m_WaveWinDC) return;

	m = m_cWaveY[0x7F];

	for (x = 0;x < MAXWAVE + 1;x++) {
		gStaticWave[x] = gWave[x];
		y = m_cWaveY[gWave[x]];
		o = m_oWave[x];
		if (y != o) {
			m_WaveWinDC->SetPixelV(x + 2, o, _WAVEBKG);
			m_WaveWinDC->SetPixelV(x + 2, y, _WAVEDAT);
		}
		m_oWave[x] = y;

		if (y != m)
			m_WaveWinDC->SetPixelV(x + 2, m, _WAVENUL);
	}
}

/////////////////////////////////////////////////////////////////////////////
// CWaveWin message handlers

void CWaveWin::OnPaint()
{
	// Signal that Wave is ready
	if (gPlaying == -2) gPlaying = -1;

	int x, y, m;
	CBrush bk(_WAVEBKG);

	CPaintDC dc(this); // device context for painting

	CRect rect;
	GetClientRect(&rect);


	CBrush* pOldBrush = dc.SelectObject(&bk);
	dc.Rectangle(rect);
	dc.SelectObject(pOldBrush);

	m = m_cWaveY[0x7F] - 1;

	for (x = 0;x < MAXWAVE + 1;x++) {
		y = m_oWave[x] - 1;
		dc.SetPixelV(x + 1, y, _WAVEDAT);
		if (y != m)
			dc.SetPixelV(x + 1, m, _WAVENUL);
	}

	// Do not call CStatic::OnPaint() for painting messages
}

void CWaveWin::OnDestroy()
{
	CStatic::OnDestroy();

	if (m_WaveWinDC != NULL) {
		delete m_WaveWinDC;
		m_WaveWinDC = NULL;
	}
}