321 lines
9.2 KiB
C
321 lines
9.2 KiB
C
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/****************************************************************************
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*
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* capinit.c
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*
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* Initialization code.
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*
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* Microsoft Video for Windows Sample Capture Class
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*
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* Copyright (c) 1992, 1993 Microsoft Corporation. All Rights Reserved.
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*
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* You have a royalty-free right to use, modify, reproduce and
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* distribute the Sample Files (and/or any modified version) in
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* any way you find useful, provided that you agree that
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* Microsoft has no warranty obligations or liability for any
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* Sample Application Files which are modified.
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*
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***************************************************************************/
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#include <windows.h>
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#include <windowsx.h>
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#include <ver.h>
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#include <mmsystem.h>
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//
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// define these before any msvideo.h, so our functions get declared right.
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//
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#ifndef WIN32
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#define VFWAPI FAR PASCAL _loadds
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#define VFWAPIV FAR CDECL _loadds
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#endif
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#include "msvideo.h"
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#include <drawdib.h>
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#include "avicap.h"
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#include "avicapi.h"
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// for correct handling of capGetDriverDescription on NT and Chicago
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// this is used by the NT version of avicap.dll (16bit) but not intended for
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// public use, hence not in msvideo.h
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DWORD WINAPI videoCapDriverDescAndVer (
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DWORD wDriverIndex,
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LPSTR lpszName, UINT cbName,
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LPSTR lpszVer, UINT cbVer);
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HINSTANCE ghInst;
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BOOL gfIsRTL;
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char szCaptureWindowClass[] = "ClsCapWin";
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typedef struct tagVS_VERSION
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{
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WORD wTotLen;
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WORD wValLen;
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char szSig[16];
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VS_FIXEDFILEINFO vffInfo;
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} VS_VERSION;
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typedef struct tagLANGANDCP
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{
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WORD wLanguage;
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WORD wCodePage;
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} LANGANDCP;
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BOOL FAR PASCAL RegisterCaptureClass (HINSTANCE hInst)
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{
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WNDCLASS cls;
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// If we're already registered, we're OK
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if (GetClassInfo(hInst, szCaptureWindowClass, &cls))
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return TRUE;
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cls.hCursor = LoadCursor(NULL, IDC_ARROW);
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cls.hIcon = NULL;
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cls.lpszMenuName = NULL;
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cls.lpszClassName = szCaptureWindowClass;
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cls.hbrBackground = (HBRUSH)(COLOR_APPWORKSPACE + 1);
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cls.hInstance = hInst;
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cls.style = CS_HREDRAW|CS_VREDRAW | CS_BYTEALIGNCLIENT |
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CS_GLOBALCLASS;
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cls.lpfnWndProc = (WNDPROC) CapWndProc;
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cls.cbClsExtra = 0;
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// Kludge, VB Status and Error GlobalAlloc'd ptrs + room to grow...
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cls.cbWndExtra = sizeof (LPCAPSTREAM) + sizeof (DWORD) * 4;
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RegisterClass(&cls);
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return TRUE;
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}
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//
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// Internal version
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// Get the name and version of the video device
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//
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BOOL capInternalGetDriverDesc (WORD wDriverIndex,
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LPSTR lpszName, int cbName,
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LPSTR lpszVer, int cbVer)
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{
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return (BOOL) videoCapDriverDescAndVer(
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wDriverIndex,
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lpszName, cbName,
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lpszVer, cbVer);
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}
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//
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// Exported version
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// Get the name and version of the video device
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//
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BOOL VFWAPI capGetDriverDescription (WORD wDriverIndex,
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LPSTR lpszName, int cbName,
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LPSTR lpszVer, int cbVer)
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{
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return (capInternalGetDriverDesc (wDriverIndex,
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lpszName, cbName,
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lpszVer, cbVer));
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}
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//
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// Disconnect from hardware resources
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//
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BOOL CapWinDisconnectHardware(LPCAPSTREAM lpcs)
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{
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if( lpcs->hVideoCapture ) {
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videoStreamFini (lpcs->hVideoCapture);
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videoClose( lpcs->hVideoCapture );
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}
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if( lpcs->hVideoDisplay ) {
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videoStreamFini (lpcs->hVideoDisplay);
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videoClose( lpcs->hVideoDisplay );
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}
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if( lpcs->hVideoIn ) {
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videoClose( lpcs->hVideoIn );
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}
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lpcs->fHardwareConnected = FALSE;
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lpcs->hVideoCapture = NULL;
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lpcs->hVideoDisplay = NULL;
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lpcs->hVideoIn = NULL;
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lpcs->sCapDrvCaps.fHasDlgVideoSource = FALSE;
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lpcs->sCapDrvCaps.fHasDlgVideoFormat = FALSE;
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lpcs->sCapDrvCaps.fHasDlgVideoDisplay = FALSE;
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lpcs->sCapDrvCaps.fHasDlgVideoDisplay = FALSE;
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lpcs->sCapDrvCaps.hVideoIn = NULL;
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lpcs->sCapDrvCaps.hVideoOut = NULL;
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lpcs->sCapDrvCaps.hVideoExtIn = NULL;
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lpcs->sCapDrvCaps.hVideoExtOut = NULL;
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return TRUE;
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}
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//
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// Connect to hardware resources
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// Return: TRUE if hardware connected to the stream
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//
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BOOL CapWinConnectHardware (LPCAPSTREAM lpcs, WORD wDeviceIndex)
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{
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DWORD dwError;
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CHANNEL_CAPS VideoCapsExternalOut;
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char ach1[_MAX_CAP_PATH];
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char ach2[_MAX_CAP_PATH * 3];
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CAPINFOCHUNK cic;
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HINSTANCE hInstT;
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lpcs->hVideoCapture = NULL;
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lpcs->hVideoDisplay = NULL;
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lpcs->hVideoIn = NULL;
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lpcs->fHardwareConnected = FALSE;
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lpcs->fUsingDefaultPalette = TRUE;
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lpcs->sCapDrvCaps.fHasDlgVideoSource = FALSE;
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lpcs->sCapDrvCaps.fHasDlgVideoFormat = FALSE;
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lpcs->sCapDrvCaps.fHasDlgVideoDisplay = FALSE;
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lpcs->sCapDrvCaps.wDeviceIndex = wDeviceIndex;
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// Clear any existing capture device name chunk
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cic.fccInfoID = mmioFOURCC ('I','S','F','T');
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cic.lpData = NULL;
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cic.cbData = 0;
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SetInfoChunk (lpcs, &cic);
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// try and open the video hardware!!!
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if( !(dwError = videoOpen( &lpcs->hVideoIn, wDeviceIndex, VIDEO_IN ) ) ) {
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if( !(dwError = videoOpen( &lpcs->hVideoCapture, wDeviceIndex, VIDEO_EXTERNALIN ) ) ) {
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// We don't require the EXTERNALOUT channel,
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// but do require EXTERNALIN and IN
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videoOpen( &lpcs->hVideoDisplay, wDeviceIndex, VIDEO_EXTERNALOUT );
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if( (!dwError) && lpcs->hVideoCapture && lpcs->hVideoIn ) {
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lpcs->fHardwareConnected = TRUE;
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capInternalGetDriverDesc (wDeviceIndex,
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ach1, sizeof (ach1),
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ach2, sizeof (ach2));
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lstrcat (ach1, ", ");
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lstrcat (ach1, ach2);
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statusUpdateStatus (lpcs, IDS_CAP_INFO, (LPSTR) ach1);
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// Make a string of the current task and capture driver
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ach2[0] = '\0';
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if (hInstT = GetWindowWord (GetParent (lpcs->hwnd), GWW_HINSTANCE))
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GetModuleFileName (hInstT, ach2, sizeof (ach2));
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lstrcat (ach2, " -AVICAP- ");
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lstrcat (ach2, ach1);
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// Set software chunk with name of capture device
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if (*ach2) {
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cic.lpData = ach2;
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cic.cbData = lstrlen(ach2) + 1;
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SetInfoChunk (lpcs, &cic);
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}
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}
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}
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}
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if (dwError)
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errorDriverID (lpcs, dwError);
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if(!lpcs->fHardwareConnected) {
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CapWinDisconnectHardware(lpcs);
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}
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else {
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if (lpcs->hVideoDisplay && videoGetChannelCaps (lpcs->hVideoDisplay,
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&VideoCapsExternalOut,
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sizeof (CHANNEL_CAPS)) == DV_ERR_OK) {
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lpcs->sCapDrvCaps.fHasOverlay = (BOOL)(VideoCapsExternalOut.dwFlags &
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(DWORD)VCAPS_OVERLAY);
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}
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else
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lpcs->sCapDrvCaps.fHasOverlay = FALSE;
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// if the hardware doesn't support it, make sure we don't enable
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if (!lpcs->sCapDrvCaps.fHasOverlay)
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lpcs->fOverlayWindow = FALSE;
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// Start the external in channel streaming continuously
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videoStreamInit (lpcs->hVideoCapture, 0L, 0L, 0L, 0L);
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} // end if hardware is available
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#if 0
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// if we don't have a powerful machine, disable capture
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if (GetWinFlags() & (DWORD) WF_CPU286)
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CapWinDisconnectHardware(lpcs);
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#endif
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if (!lpcs->fHardwareConnected){
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lpcs->fLiveWindow = FALSE;
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lpcs->fOverlayWindow = FALSE;
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}
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if (lpcs->hVideoIn)
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lpcs->sCapDrvCaps.fHasDlgVideoFormat = !videoDialog (lpcs-> hVideoIn,
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lpcs-> hwnd, VIDEO_DLG_QUERY);
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if (lpcs->hVideoCapture)
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lpcs->sCapDrvCaps.fHasDlgVideoSource = !videoDialog (lpcs-> hVideoCapture,
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lpcs-> hwnd, VIDEO_DLG_QUERY);
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if (lpcs->hVideoDisplay)
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lpcs->sCapDrvCaps.fHasDlgVideoDisplay = !videoDialog (lpcs-> hVideoDisplay,
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lpcs-> hwnd, VIDEO_DLG_QUERY);
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lpcs->sCapDrvCaps.hVideoIn = lpcs->hVideoIn;
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lpcs->sCapDrvCaps.hVideoOut = NULL;
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lpcs->sCapDrvCaps.hVideoExtIn = lpcs->hVideoCapture;
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lpcs->sCapDrvCaps.hVideoExtOut = lpcs->hVideoDisplay;
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return lpcs->fHardwareConnected;
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}
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//
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// Creates a child window of the capture class
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// Normally:
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// Set lpszWindowName to NULL
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// Set dwStyle to WS_CHILD | WS_VISIBLE
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// Set hmenu to a unique child id
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HWND VFWAPI capCreateCaptureWindow (
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LPCSTR lpszWindowName,
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DWORD dwStyle,
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int x, int y, int nWidth, int nHeight,
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HWND hwndParent, int nID)
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{
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DWORD fdwFlags;
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#ifndef WS_EX_LEFTSCROLLBAR
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#define WS_EX_LEFTSCROLLBAR 0
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#define WS_EX_RIGHT 0
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#define WS_EX_RTLREADING 0
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#endif
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RegisterCaptureClass(ghInst);
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fdwFlags = gfIsRTL ? WS_EX_LEFTSCROLLBAR | WS_EX_RIGHT | WS_EX_RTLREADING : 0;
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return CreateWindowEx(fdwFlags,
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szCaptureWindowClass,
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lpszWindowName,
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dwStyle,
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x, y, nWidth, nHeight,
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hwndParent, (HMENU) nID,
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ghInst,
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NULL);
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}
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int CALLBACK LibMain(HINSTANCE hinst, WORD wDataSeg, WORD cbHeap,
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LPSTR lpszCmdLine )
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{
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char ach[2];
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ghInst = hinst;
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LoadString(ghInst, IDS_CAP_RTL, ach, sizeof(ach));
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gfIsRTL = ach[0] == '1';
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return TRUE;
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}
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int FAR PASCAL WEP(int i)
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{
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return 1;
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}
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