wavgraph.cpp

evc编写的wave文件波形播放

// WavGraph.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "WavGraph.h"
#include <commctrl.h>
#include <aygshell.h>
#include <sipapi.h>

#include <mmsystem.h>
#include "waveinfo.h"
#include "winDev.h"

#include "bitmap.h"

#include "fft.h"

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE			hInst;					// The current instance
HWND				hwndCB;					// The command bar handle

HWND				g_hWnd;
HDC					g_memdc;
HBITMAP				g_bitmap;
RGBTRIPLE			*g_buffer;
long				g_bufsize;
BOOL				g_started=FALSE;
recctx				g_ctx;
RECT				g_rect;
BOOL				g_waveform=TRUE;
BOOL				g_freqence=FALSE;
DOUBLE				g_real[256],g_image[256];

static SHACTIVATEINFO s_sai;

// Forward declarations of functions included in this code module:
ATOM				MyRegisterClass	(HINSTANCE, LPTSTR);
BOOL				InitInstance	(HINSTANCE, int);
LRESULT CALLBACK	WndProc			(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK	About			(HWND, UINT, WPARAM, LPARAM);
HWND				CreateRpCommandBar(HWND);

BOOL StartDevice();
void StopDevice();
int	cbdatain(recctx *pctx,unsigned char *buf,int buflen);
void DrawWave(RGBTRIPLE *buffer,int width,int height,unsigned char *pts,long npt);
void DrawFreq(RGBTRIPLE *buffer,int width,int height,unsigned char *pts,long npt);

int WINAPI WinMain(	HINSTANCE hInstance,
					HINSTANCE hPrevInstance,
					LPTSTR    lpCmdLine,
					int       nCmdShow)
{
	MSG msg;
	HACCEL hAccelTable;

	// Perform application initialization:
	if (!InitInstance (hInstance, nCmdShow)) 
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_WAVGRAPH);

	// Main message loop:
	while (GetMessage(&msg, NULL, 0, 0)) 
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) 
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return msg.wParam;
}

//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    It is important to call this function so that the application 
//    will get 'well formed' small icons associated with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance, LPTSTR szWindowClass)
{
	WNDCLASS	wc;

    wc.style			= CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc		= (WNDPROC) WndProc;
    wc.cbClsExtra		= 0;
    wc.cbWndExtra		= 0;
    wc.hInstance		= hInstance;
    wc.hIcon			= LoadIcon(hInstance, MAKEINTRESOURCE(IDI_WAVGRAPH));
    wc.hCursor			= 0;
    wc.hbrBackground	= (HBRUSH) GetStockObject(WHITE_BRUSH);
    wc.lpszMenuName		= 0;
    wc.lpszClassName	= szWindowClass;

	return RegisterClass(&wc);
}

//
//  FUNCTION: InitInstance(HANDLE, int)
//
//  PURPOSE: Saves instance handle and creates main window
//
//  COMMENTS:
//
//    In this function, we save the instance handle in a global variable and
//    create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
	HWND	hWnd = NULL;
	TCHAR	szTitle[MAX_LOADSTRING];			// The title bar text
	TCHAR	szWindowClass[MAX_LOADSTRING];		// The window class name

	hInst = hInstance;		// Store instance handle in our global variable
	// Initialize global strings
	LoadString(hInstance, IDC_WAVGRAPH, szWindowClass, MAX_LOADSTRING);
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);

	//If it is already running, then focus on the window
	hWnd = FindWindow(szWindowClass, szTitle);	
	if (hWnd) 
	{
		SetForegroundWindow ((HWND) (((DWORD)hWnd) | 0x01));    
		return 0;
	} 

	MyRegisterClass(hInstance, szWindowClass);
	
	RECT	rect;
	GetClientRect(hWnd, &rect);
	
	hWnd = CreateWindow(szWindowClass, szTitle, WS_VISIBLE,
		CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);
	if (!hWnd)
	{	
		return FALSE;
	}
	//When the main window is created using CW_USEDEFAULT the height of the menubar (if one
	// is created is not taken into account). So we resize the window after creating it
	// if a menubar is present
	{
		RECT rc;
		GetWindowRect(hWnd, &rc);
		rc.bottom -= MENU_HEIGHT;
		if (hwndCB)
			MoveWindow(hWnd, rc.left, rc.top, rc.right, rc.bottom, FALSE);
	}


	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);

	return TRUE;
}

//
//  FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND	- process the application menu
//  WM_PAINT	- Paint the main window
//  WM_DESTROY	- post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	TCHAR szHello[MAX_LOADSTRING];

	switch (message) 
	{
		case WM_COMMAND:
			wmId    = LOWORD(wParam); 
			wmEvent = HIWORD(wParam); 
			// Parse the menu selections:
			switch (wmId)
			{	
				case ID_START:
					if(!StartDevice())
						MessageBox(hWnd,L"Record device start failed",L"Error",MB_OK);
					g_started=TRUE;
					break;
				case ID_STOP:
					StopDevice();
					break;
				case ID_WAVEFORM:
					g_waveform=TRUE;
					g_freqence=FALSE;
					break;
				case ID_FREQUENCE:
					g_waveform=FALSE;
					g_freqence=TRUE;
					break;
				case IDM_HELP_ABOUT:
					DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
				    break;
				case IDOK:
					SendMessage(hWnd, WM_ACTIVATE, MAKEWPARAM(WA_INACTIVE, 0), (LPARAM)hWnd);
					SendMessage (hWnd, WM_CLOSE, 0, 0);
					break;
				case ID_EXIT:
					PostQuitMessage(0);
					break;
				default:
				   return DefWindowProc(hWnd, message, wParam, lParam);
			}
			break;
		case WM_CREATE:
			hwndCB = CreateRpCommandBar(hWnd);
			{
				g_hWnd=hWnd;
				GetClientRect(g_hWnd,&g_rect);
				::InflateRect(&g_rect,
							  -(g_rect.right-g_rect.left-256),
							  -(g_rect.bottom-g_rect.top-256));
				HDC hdc=GetDC(hWnd);
				g_memdc=CreateCompatibleDC(hdc);
				g_bitmap=CreateBgBitmap(g_memdc,g_rect.right-g_rect.left,g_rect.bottom-g_rect.top,24,(void **)&g_buffer,&g_bufsize);
				SelectObject(g_memdc,g_bitmap);
				ReleaseDC(hWnd,hdc);
			}
			break;
		case WM_PAINT:
			RECT rt;
			hdc = BeginPaint(hWnd, &ps);
			GetClientRect(hWnd, &rt);
			LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
			DrawText(hdc, szHello, _tcslen(szHello), &rt, 
				DT_SINGLELINE | DT_VCENTER | DT_CENTER);
			EndPaint(hWnd, &ps);
			break; 
		case WM_DESTROY:
			StopDevice();
			DestroyBgBitmap(g_bitmap);
			CommandBar_Destroy(hwndCB);
			PostQuitMessage(0);
			break;
		case WM_SETTINGCHANGE:
			SHHandleWMSettingChange(hWnd, wParam, lParam, &s_sai);
     		break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

HWND CreateRpCommandBar(HWND hwnd)
{
	SHMENUBARINFO mbi;

	memset(&mbi, 0, sizeof(SHMENUBARINFO));
	mbi.cbSize     = sizeof(SHMENUBARINFO);
	mbi.hwndParent = hwnd;
	mbi.nToolBarId = IDM_MENU;
	mbi.hInstRes   = hInst;
	mbi.nBmpId     = 0;
	mbi.cBmpImages = 0;

	if (!SHCreateMenuBar(&mbi)) 
		return NULL;

	return mbi.hwndMB;
}

// Mesage handler for the About box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	SHINITDLGINFO shidi;

	switch (message)
	{
		case WM_INITDIALOG:
			// Create a Done button and size it.  
			shidi.dwMask = SHIDIM_FLAGS;
			 shidi.dwFlags = SHIDIF_DONEBUTTON | SHIDIF_SIPDOWN | SHIDIF_SIZEDLGFULLSCREEN;
			shidi.hDlg = hDlg;
			SHInitDialog(&shidi);
			return TRUE; 

		case WM_COMMAND:
			if (LOWORD(wParam) == IDOK) {
				EndDialog(hDlg, LOWORD(wParam));
				return TRUE;
			}
			break;
	}
    return FALSE;
}

BOOL StartDevice()
{
	if(!g_started)
	{
		memset(&g_ctx,0,sizeof(recctx));
		g_ctx.devid=WAVE_MAPPER;
		g_ctx.info.channel=1;
		g_ctx.info.freq=11025;
		g_ctx.info.bitspersample=8;
		g_ctx.userdata=(unsigned long)g_hWnd;

		return startrecord(&g_ctx,cbdatain);
	}
	else
	{
		return FALSE;
	}
}

void StopDevice()
{
	if(g_started)
		stoprecord(&g_ctx);
}

int	cbdatain(recctx *pctx,unsigned char *buf,int buflen)
{
	HWND hWnd=(HWND)pctx->userdata;
	if(hWnd != NULL)
	{
		HDC hdc=GetDC(hWnd);

		memset(g_buffer,255,g_bufsize);
		if(g_waveform)
		{
			DrawWave(g_buffer,g_rect.right-g_rect.left,g_rect.bottom-g_rect.top,buf,buflen);
		}
		if(g_freqence)
		{
			int i;

			for(i=0;i<256;i++)
			{
				g_real[i]=(double)buf[i];
				g_image[i]=0.0;
			}
			fft(g_real,g_image,8);
			int power;
			buflen=buflen>>1;
			for(i=0;i<buflen;i++)
			{
				power=(int)(g_real[i]*g_real[i]+g_image[i]*g_image[i])/100;
				if(power > 255)
					power=255;
				buf[i]=power;
			}
			DrawFreq(g_buffer,g_rect.right-g_rect.left,g_rect.bottom-g_rect.top,buf,buflen);
		}

		BitBlt(hdc,g_rect.left,g_rect.top,g_rect.right-g_rect.left,g_rect.bottom-g_rect.top,
			   g_memdc,0,0,SRCCOPY);

		ReleaseDC(hWnd,hdc);
	}

	return 0;
}

void DrawWave(RGBTRIPLE *buffer,int width,int height,unsigned char *pts,long npt)
{
	int i,j;
	int sub,hh=height>>1;
	long npixels=width*height;
	RGBTRIPLE *base,*p,*up,*down;

	up=buffer+npixels;
	down=buffer;

	if(npt > width)
		npt=width;

	base=buffer+(npixels>>1);
	
	for(i=0;i<npt;i++)
	{
		p=base;
		sub=pts[i]-128;
		if(sub < 0)
		{
			if(sub<-hh)
				sub=-hh;
			for(j=sub;j<0;j++)
			{
				p->rgbtBlue=0;
				p->rgbtGreen=0;
				p->rgbtRed=0;

				p-=width;
			}
		}
		else if(sub > 0)
		{
			if(sub>hh)
				sub=hh;
			for(j=0;j<sub;j++)
			{
				p->rgbtBlue=0;
				p->rgbtGreen=0;
				p->rgbtRed=0;

				p+=width;
			}
		}

		base++;
	}
}

void DrawFreq(RGBTRIPLE *buffer,int width,int height,unsigned char *pts,long npt)
{
	int i,j;
	int sub;
	long npixels=width*height;
	RGBTRIPLE *base,*p,*up,*down;

	up=buffer+npixels;
	down=buffer;

	if(npt > width)
		npt=width;

	base=buffer+width;
	
	for(i=0;i<npt;i++)
	{
		p=base;
		sub=pts[i];
		if(sub>height)
			sub=height;
		for(j=0;j<sub;j++)
		{
			p->rgbtBlue=0;
			p->rgbtGreen=0;
			p->rgbtRed=0;

			p+=width;
		}

		base+=2;
	}
}