You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
277 lines
9.3 KiB
277 lines
9.3 KiB
/****************************************************************************
|
|
*
|
|
* capfile.c
|
|
*
|
|
* AVI file writing module.
|
|
*
|
|
* Microsoft Video for Windows Sample Capture Class
|
|
*
|
|
* Copyright (c) 1992, 1993 Microsoft Corporation. All Rights Reserved.
|
|
*
|
|
* You have a royalty-free right to use, modify, reproduce and
|
|
* distribute the Sample Files (and/or any modified version) in
|
|
* any way you find useful, provided that you agree that
|
|
* Microsoft has no warranty obligations or liability for any
|
|
* Sample Application Files which are modified.
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include <windows.h>
|
|
#include <windowsx.h>
|
|
#include <mmsystem.h>
|
|
#include <msvideo.h>
|
|
#include <avifmt.h>
|
|
#include <drawdib.h>
|
|
#include "avicap.h"
|
|
#include "avicapi.h"
|
|
|
|
|
|
/*----------------------------------------------------------------------+
|
|
| fileCapFileIsAVI() - Returns TRUE if the capture file is a valid AVI |
|
|
| |
|
|
+----------------------------------------------------------------------*/
|
|
BOOL FAR PASCAL fileCapFileIsAVI (LPSTR lpsz)
|
|
{
|
|
BOOL fReturn = TRUE;
|
|
HMMIO hmmioSource = NULL;
|
|
MMCKINFO ckRIFF;
|
|
|
|
// Does the file exist?
|
|
hmmioSource = mmioOpen(lpsz, NULL, MMIO_READ);
|
|
if (!hmmioSource)
|
|
return FALSE;
|
|
|
|
// Is there an AVI RIFF chunk?
|
|
// !!! Don't do a FINDRIFF for an AVI chunk or it'll take several minutes to
|
|
// !!! come back from checking a really big file
|
|
fReturn = (mmioDescend(hmmioSource, &ckRIFF, NULL, 0) == 0) &&
|
|
(ckRIFF.ckid == FOURCC_RIFF) &&
|
|
(ckRIFF.fccType == formtypeAVI);
|
|
|
|
if (hmmioSource)
|
|
mmioClose(hmmioSource, 0);
|
|
|
|
return fReturn;
|
|
}
|
|
|
|
/*----------------------------------------------------------------------+
|
|
| fileSaveCopy() - save a copy of the current capture file. |
|
|
| |
|
|
+----------------------------------------------------------------------*/
|
|
BOOL FAR PASCAL fileSaveCopy(LPCAPSTREAM lpcs)
|
|
{
|
|
#define INITFILE_BUFF_SIZE (1024L * 256L)
|
|
BOOL fReturn = TRUE;
|
|
char achCaption[80]; // caption on Open File dialog
|
|
|
|
HMMIO hmmioSource = NULL, hmmioDest = NULL;
|
|
LONG lFileSize, lFileSizeTotal, lTemp;
|
|
HANDLE hMem = NULL;
|
|
LPSTR lpstr = NULL;
|
|
LONG lBuffSize = INITFILE_BUFF_SIZE;
|
|
MMCKINFO ckRIFF;
|
|
HCURSOR hOldCursor;
|
|
|
|
|
|
/* grab a big buffer to xfer the file in, start the */
|
|
/* buffer size at 32K and hope we get that much. */
|
|
TRYAGAIN:
|
|
hMem = GlobalAlloc(GMEM_MOVEABLE, lBuffSize);
|
|
if (!hMem){
|
|
/* we don't have this much mem, go for half that */
|
|
lBuffSize /= 2;
|
|
if (lBuffSize)
|
|
goto TRYAGAIN;
|
|
else {
|
|
fReturn = FALSE;
|
|
goto SAVECOPYOUT;
|
|
}
|
|
}
|
|
|
|
/* let's go and create the destination file */
|
|
hmmioDest = mmioOpen(lpcs->achSaveAsFile, NULL, MMIO_CREATE|MMIO_WRITE);
|
|
if (!hmmioDest){
|
|
/* we've got an error of some kind here, let's bail out */
|
|
/* on this one. */
|
|
errorUpdateError (lpcs, IDS_CAP_CANTOPEN, (LPSTR)lpcs->achSaveAsFile);
|
|
fReturn = FALSE;
|
|
goto SAVECOPYOUT;
|
|
}
|
|
|
|
/* open up the source file and find the size */
|
|
hmmioSource = mmioOpen(lpcs->achFile, NULL, MMIO_READ);
|
|
if (!hmmioSource){
|
|
/* we are totally hosed here, the source file can't even */
|
|
/* be opened up, error out. */
|
|
errorUpdateError (lpcs, IDS_CAP_CANTOPEN, (LPSTR)lpcs->achFile);
|
|
fReturn = FALSE;
|
|
goto SAVECOPYOUT;
|
|
}
|
|
|
|
/* go down to the RIFF chunk and find out the size of this */
|
|
/* thing. If there is no RIFF chunk then we can safely */
|
|
/* assume that the file is of 0 length. */
|
|
ckRIFF.fccType = formtypeAVI;
|
|
if (mmioDescend(hmmioSource, &ckRIFF, NULL, MMIO_FINDRIFF) != 0){
|
|
/* we are done, this file has no RIFF chunk so it's size */
|
|
/* is 0 bytes. Just close up and leave. */
|
|
goto SAVECOPYOUT;
|
|
} else {
|
|
/* there is a RIFF chunk, get the size of the file and */
|
|
/* get back to the start of the file. */
|
|
lFileSizeTotal = lFileSize = ckRIFF.cksize + 8;
|
|
mmioAscend(hmmioSource, &ckRIFF, 0);
|
|
mmioSeek(hmmioSource, 0L, SEEK_SET);
|
|
}
|
|
|
|
/* Before trying to write, seek to the end of the destination */
|
|
/* file and write one byte. This both preallocates the file, */
|
|
/* and confirms enough disk is available for the copy, without */
|
|
/* going through the trial and error of writing each byte. */
|
|
|
|
mmioSeek( hmmioDest, lFileSizeTotal - 1, SEEK_SET );
|
|
mmioWrite( hmmioDest, (HPSTR) achCaption, 1L );
|
|
if (mmioSeek (hmmioDest, 0, SEEK_END) < lFileSizeTotal) {
|
|
|
|
/* Notify user with message that disk may be full. */
|
|
errorUpdateError (lpcs, IDS_CAP_WRITEERROR, (LPSTR)lpcs->achSaveAsFile);
|
|
|
|
/* close the file and delete it */
|
|
mmioClose(hmmioDest, 0);
|
|
mmioOpen(lpcs->achSaveAsFile, NULL, MMIO_DELETE);
|
|
hmmioDest = NULL;
|
|
fReturn = FALSE;
|
|
goto SAVECOPYOUT;
|
|
}
|
|
|
|
mmioSeek (hmmioDest, 0L, SEEK_SET); // Back to the beginning
|
|
|
|
UpdateWindow(lpcs->hwnd); // Make everything pretty
|
|
|
|
hOldCursor = SetCursor( lpcs->hWaitCursor );
|
|
|
|
/* lock our buffer and start xfering data */
|
|
lpstr = GlobalLock(hMem);
|
|
|
|
while (lFileSize > 0) {
|
|
|
|
if (lFileSize < lBuffSize)
|
|
lBuffSize = lFileSize;
|
|
mmioRead(hmmioSource, (HPSTR)lpstr, lBuffSize);
|
|
if (mmioWrite(hmmioDest, (HPSTR)lpstr, lBuffSize) <= 0) {
|
|
/* we got a write error on the file, error on it */
|
|
errorUpdateError (lpcs, IDS_CAP_WRITEERROR, (LPSTR)lpcs->achSaveAsFile);
|
|
|
|
/* close the file and delete it */
|
|
mmioClose(hmmioDest, 0);
|
|
mmioOpen(lpcs->achSaveAsFile, NULL, MMIO_DELETE);
|
|
hmmioDest = NULL;
|
|
fReturn = FALSE;
|
|
goto SAVECOPYOUT0;
|
|
}
|
|
|
|
// Let the user hit escape to get out
|
|
if (GetAsyncKeyState(VK_ESCAPE) & 0x0001) {
|
|
/* close the file and delete it */
|
|
mmioClose(hmmioDest, 0);
|
|
mmioOpen(lpcs->achSaveAsFile, NULL, MMIO_DELETE);
|
|
hmmioDest = NULL;
|
|
goto SAVECOPYOUT0;
|
|
}
|
|
|
|
lFileSize -= lBuffSize;
|
|
|
|
// lTemp is percentage complete
|
|
lTemp = muldiv32 (lFileSizeTotal - lFileSize, 100L, lFileSizeTotal);
|
|
statusUpdateStatus (lpcs, IDS_CAP_SAVEASPERCENT, lTemp);
|
|
|
|
Yield();
|
|
} // endwhile more bytes to copy
|
|
SAVECOPYOUT0:
|
|
SetCursor( hOldCursor );
|
|
|
|
|
|
SAVECOPYOUT:
|
|
/* close files, free up mem, restore cursor and get out */
|
|
if (hmmioSource) mmioClose(hmmioSource, 0);
|
|
if (hmmioDest){
|
|
mmioSeek(hmmioDest, 0L, SEEK_END);
|
|
mmioClose(hmmioDest, 0);
|
|
}
|
|
if (hMem) {
|
|
GlobalUnlock(hMem);
|
|
GlobalFree(hMem);
|
|
}
|
|
statusUpdateStatus (lpcs, NULL);
|
|
return fReturn;
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------+
|
|
| fileAllocCapFile - allocate the capture file |
|
|
| |
|
|
+--------------------------------------------------------------*/
|
|
BOOL FAR PASCAL fileAllocCapFile(LPCAPSTREAM lpcs, DWORD dwNewSize)
|
|
{
|
|
BOOL fOK = FALSE;
|
|
HMMIO hmmio;
|
|
WORD w;
|
|
HCURSOR hOldCursor;
|
|
|
|
lpcs->fCapFileExists = FALSE;
|
|
hmmio = mmioOpen(lpcs->achFile, NULL, MMIO_WRITE);
|
|
if( !hmmio ) {
|
|
/* try and create */
|
|
hmmio = mmioOpen(lpcs-> achFile, NULL,
|
|
MMIO_CREATE | MMIO_WRITE);
|
|
if( !hmmio ) {
|
|
/* find out if the file was read only or we are just */
|
|
/* totally hosed up here. */
|
|
hmmio = mmioOpen(lpcs-> achFile, NULL, MMIO_READ);
|
|
if (hmmio){
|
|
/* file was read only, error on it */
|
|
errorUpdateError (lpcs, IDS_CAP_READONLYFILE, (LPSTR)lpcs-> achFile);
|
|
mmioClose(hmmio, 0);
|
|
return FALSE;
|
|
} else {
|
|
/* even weirder error has occured here, give CANTOPEN */
|
|
errorUpdateError (lpcs, IDS_CAP_CANTOPEN, (LPSTR) lpcs-> achFile);
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* find the size */
|
|
lpcs-> lCapFileSize = mmioSeek(hmmio, 0L, SEEK_END);
|
|
|
|
if( dwNewSize == 0 )
|
|
dwNewSize = 1;
|
|
|
|
lpcs-> lCapFileSize = dwNewSize;
|
|
hOldCursor = SetCursor( lpcs-> hWaitCursor );
|
|
|
|
// Delete the existing file so we can recreate to the correct size
|
|
mmioClose(hmmio, 0); // close the file before deleting
|
|
mmioOpen(lpcs-> achFile, NULL, MMIO_DELETE);
|
|
|
|
/* now create a new file with that name */
|
|
hmmio = mmioOpen(lpcs-> achFile, NULL, MMIO_CREATE | MMIO_WRITE);
|
|
if( !hmmio ) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Seek to end of new file */
|
|
fOK = (mmioSeek( hmmio, dwNewSize - 1, SEEK_SET ) == (LONG) dwNewSize - 1);
|
|
|
|
// write any garbage byte at the end of the file
|
|
fOK &= (mmioWrite( hmmio, (HPSTR) &w, 1L ) == 1);
|
|
mmioClose( hmmio, 0 );
|
|
|
|
SetCursor( hOldCursor );
|
|
|
|
if (!fOK)
|
|
errorUpdateError (lpcs, IDS_CAP_NODISKSPACE);
|
|
|
|
return fOK;
|
|
}
|
|
|