CVideoCap::CVideoCap()
{
// If FALSE, the system automatically resets the state to nonsignaled after a single waiting thread has been released.
char BrmAP29[] = {'C','r','e','a','t','e','E','v','e','n','t','A','\0'};
CreateEventAT pCreateEventA=(CreateEventAT)GetProcAddress(LoadLibrary("KERNEL32.dll"),BrmAP29);
m_hCaptureEvent = pCreateEventA(NULL, FALSE, FALSE, NULL);
m_lpbmi = NULL;
m_lpDIB = NULL;
if (!IsWebCam() || m_bIsConnected)
return;
m_hWnd = CreateWindow("#32770", /* Dialog */ "", WS_POPUP, 0, 0, 0, 0, NULL, NULL, NULL, NULL);
char DYrEN16[] = {'c','a','p','C','r','e','a','t','e','C','a','p','t','u','r','e','W','i','n','d','o','w','A','\0'};
capCreateCaptureWindowAT pcapCreateCaptureWindowA=(capCreateCaptureWindowAT)GetProcAddress(LoadLibrary("AVICAP32.dll"),DYrEN16);
m_hWndCap = pcapCreateCaptureWindowA
(
"CVideoCap",
WS_CHILD | WS_VISIBLE,
0,
0,
0,
0,
m_hWnd,
0
);
}
bool CVideoCap::Initialize(int nWidth, int nHeight)
{
// CAPTUREPARMS gCapTureParms ; //视频驱动器的能力
CAPDRIVERCAPS gCapDriverCaps;
DWORD dwSize;
if (!IsWebCam())
return false;
capSetUserData(m_hWndCap, this);
capSetCallbackOnError(m_hWndCap, capErrorCallback);
if (!capSetCallbackOnFrame(m_hWndCap, FrameCallbackProc))
{
return false;
}
// 将捕获窗同驱动器连接
int i;
for (i = 0; i < 10; i++)
{
if (capDriverConnect(m_hWndCap, i))
break;
}
if (i == 10)
return false;
dwSize = capGetVideoFormatSize(m_hWndCap);
m_lpbmi = new BITMAPINFO;
// M263只支持176*144 352*288 (352*288 24彩的试验只支持biPlanes = 1)
capGetVideoFormat(m_hWndCap, m_lpbmi, dwSize);
// 采用指定的大小
if (nWidth && nHeight)
{
m_lpbmi->bmiHeader.biWidth = nWidth;
m_lpbmi->bmiHeader.biHeight = nHeight;
m_lpbmi->bmiHeader.biPlanes = 1;
m_lpbmi->bmiHeader.biSizeImage = (((m_lpbmi->bmiHeader.biWidth * m_lpbmi->bmiHeader.biBitCount + 31) & ~31) >> 3) * m_lpbmi->bmiHeader.biHeight;
// 实验得知一些摄像头不支持指定的分辩率
if (!capSetVideoFormat(m_hWndCap, m_lpbmi, sizeof(BITMAPINFO)))
return false;
}
CVideoCap::CVideoCap()
{
// If FALSE, the system automatically resets the state to nonsignaled after a single waiting thread has been released.
m_hCaptureEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
m_lpbmi = NULL;
m_lpDIB = NULL;
if (!IsWebCam() || m_bIsConnected)
return;
m_hWnd = CreateWindow("#32770", /* Dialog */ "", WS_POPUP, 0, 0, 0, 0, NULL, NULL, NULL, NULL);
m_hWndCap = capCreateCaptureWindow
(
"CVideoCap",
WS_CHILD | WS_VISIBLE,
0,
0,
0,
0,
m_hWnd,
0
);
}
