659 lines
18 KiB
C
659 lines
18 KiB
C
/****************************************************************************
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*
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* cappal.c
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*
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* Palette processing module.
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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 <mmsystem.h>
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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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#include "cappal.h"
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#include "capdib.h"
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#include "dibmap.h"
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//
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// Allocate and initialize palette resources at Window create time
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//
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BOOL PalInit (LPCAPSTREAM lpcs)
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{
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return (PalGetPaletteFromDriver (lpcs));
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}
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//
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// Release palette resources at Window destroy time
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//
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void PalFini (LPCAPSTREAM lpcs)
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{
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PalDeleteCurrentPalette (lpcs);
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}
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//
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// Delete our palette if it isn't the system default palette
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//
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void PalDeleteCurrentPalette (LPCAPSTREAM lpcs)
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{
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if (lpcs->hPalCurrent &&
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(lpcs->hPalCurrent != GetStockObject(DEFAULT_PALETTE)))
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DeleteObject (lpcs->hPalCurrent);
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lpcs->hPalCurrent = NULL;
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}
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//
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// Get the current palette (from the driver)
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// Returns: TRUE if the driver can supply a palette
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//
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BOOL PalGetPaletteFromDriver (LPCAPSTREAM lpcs)
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{
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FCLOGPALETTE pal;
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PalDeleteCurrentPalette (lpcs);
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pal.palVersion = 0x0300;
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pal.palNumEntries = 256;
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lpcs->sCapDrvCaps.fDriverSuppliesPalettes = FALSE; // assume the worst
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if (lpcs->fHardwareConnected) {
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if (videoConfigure (lpcs->hVideoIn,
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DVM_PALETTE,
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VIDEO_CONFIGURE_GET | VIDEO_CONFIGURE_CURRENT, NULL,
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(LPVOID)&pal, sizeof(pal),
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NULL, NULL ) == DV_ERR_OK) {
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if (lpcs->hPalCurrent = CreatePalette ((LPLOGPALETTE) &pal))
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lpcs->sCapDrvCaps.fDriverSuppliesPalettes = TRUE;
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}
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}
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if (!lpcs->hPalCurrent)
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lpcs->hPalCurrent = GetStockObject (DEFAULT_PALETTE);
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DibNewPalette (lpcs, lpcs->hPalCurrent);
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return (lpcs->sCapDrvCaps.fDriverSuppliesPalettes);
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}
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//
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// Set the current palette used for capture by sending a copy to the driver
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// and then copying the entries to out DIB.
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// Returns DV_ERR_OK on success, or DV_ERR... on failure.
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//
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DWORD PalSendPaletteToDriver (LPCAPSTREAM lpcs, HPALETTE hpal, LPBYTE lpXlateTable)
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{
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int nColors;
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FCLOGPALETTE pal;
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HCURSOR hOldCursor;
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// The following can take a while so repaint our parent
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UpdateWindow (GetParent (lpcs-> hwnd));
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UpdateWindow (lpcs->hwnd);
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if (!hpal)
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return FALSE;
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PalDeleteCurrentPalette (lpcs);
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lpcs->hPalCurrent = hpal;
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GetObject(hpal, sizeof(int), (LPVOID)&nColors);
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if( nColors <= 1 ) { //!!>
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return( FALSE );
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}
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if (nColors > 256) //???
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;
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nColors = min(256, nColors);
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hOldCursor = SetCursor (lpcs-> hWaitCursor);
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statusUpdateStatus (lpcs, IDS_CAP_STAT_PALETTE_BUILD);
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pal.palVersion = 0x0300;
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pal.palNumEntries = nColors;
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GetPaletteEntries(hpal, 0, nColors, pal.palPalEntry);
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if (lpcs-> fHardwareConnected) {
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// first try to send both the xlate table and the palette
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if ((!lpXlateTable) || (videoConfigure( lpcs->hVideoIn,
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DVM_PALETTERGB555,
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VIDEO_CONFIGURE_SET, NULL,
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(LPLOGPALETTE)&pal, sizeof(pal),
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lpXlateTable, (DWORD) 0x8000) != 0)) {
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// else send just the palette and make the driver build the table
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videoConfigure( lpcs->hVideoIn,
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DVM_PALETTE,
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VIDEO_CONFIGURE_SET, NULL,
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(LPLOGPALETTE)&pal, sizeof(pal),
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NULL, NULL );
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}
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}
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// Supermac wants us to get the palette again, they might have
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// mucked with it!
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PalGetPaletteFromDriver (lpcs);
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// Since the palette has changed, delete any existing compression
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// output format; this forces a new output format to be selected
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if (lpcs->CompVars.lpbiOut) {
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GlobalFreePtr (lpcs->CompVars.lpbiOut);
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lpcs->CompVars.lpbiOut = NULL;
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}
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if (lpcs->CompVars.hic) {
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if (ICSeqCompressFrameStart(&lpcs->CompVars, lpcs->lpBitsInfo) == NULL) {
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lpcs-> dwReturn = IDS_CAP_COMPRESSOR_ERROR;
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errorUpdateError (lpcs, IDS_CAP_COMPRESSOR_ERROR);
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}
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}
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InvalidateRect (lpcs->hwnd, NULL, TRUE);
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UpdateWindow (lpcs->hwnd);
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SetCursor (hOldCursor);
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statusUpdateStatus (lpcs, NULL);
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return (TRUE);
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}
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//
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// CopyPalette, makes a copy of a GDI logical palette
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// Returns: a handle to the newly created palette, or NULL if error
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//
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HPALETTE CopyPalette (HPALETTE hpal)
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{
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LPLOGPALETTE lppal;
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int nNumEntries;
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if (!hpal)
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return NULL;
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GetObject (hpal,sizeof(int),(LPVOID)&nNumEntries);
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if (nNumEntries == 0)
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return NULL;
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lppal = (LPLOGPALETTE) GlobalAllocPtr (GHND,
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sizeof(LOGPALETTE) + nNumEntries * sizeof(PALETTEENTRY));
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if (!lppal)
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return NULL;
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lppal->palVersion = 0x300;
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lppal->palNumEntries = nNumEntries;
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GetPaletteEntries(hpal,0,nNumEntries,lppal->palPalEntry);
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hpal = CreatePalette(lppal);
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GlobalFreePtr (lppal);
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return hpal;
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}
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//
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// Allocate resources needed for palette capture
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// Returns DV_ERR_OK on success, or DV_ERR... on failure.
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// Note: if Init fails, you MUST call the Fini function to
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// release resources.
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//
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DWORD CapturePaletteInit (LPCAPSTREAM lpcs, LPCAPPAL lpcp)
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{
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DWORD dwError = DV_ERR_OK;
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lpcp->lpBits = NULL;
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lpcp->lp16to8 = NULL;
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lpcp->lpHistogram = NULL;
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lpcp->lpbiSave = NULL;
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lpcp->wNumFrames = 0;
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// Init an RGB16 header
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lpcp->bi16.biSize = sizeof(BITMAPINFOHEADER);
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lpcp->bi16.biWidth = lpcs->dxBits;
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lpcp->bi16.biHeight = lpcs->dyBits;
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lpcp->bi16.biPlanes = 1;
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lpcp->bi16.biBitCount = 16;
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lpcp->bi16.biCompression = BI_RGB;
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lpcp->bi16.biSizeImage = DIBWIDTHBYTES(lpcp->bi16) * lpcp->bi16.biHeight;
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lpcp->bi16.biXPelsPerMeter= 0;
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lpcp->bi16.biYPelsPerMeter= 0;
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lpcp->bi16.biClrUsed = 0;
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lpcp->bi16.biClrImportant = 0;
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// Allocate memory for the histogram, DIB, and XLate table
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lpcp->lpBits = GlobalAllocPtr (GHND, lpcp->bi16.biSizeImage);
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lpcp->lp16to8 = GlobalAllocPtr (GHND, 0x8000l);
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lpcp->lpHistogram = InitHistogram(NULL);
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if (!lpcp->lpBits || !lpcp->lp16to8 || !lpcp->lpHistogram) {
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dwError = DV_ERR_NOMEM;
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goto PalInitError;
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}
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// Init the video header
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lpcp->vHdr.lpData = lpcp->lpBits;
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lpcp->vHdr.dwBufferLength = lpcp->bi16.biSizeImage;
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lpcp->vHdr.dwUser = 0;
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lpcp->vHdr.dwFlags = 0;
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// Save the current format
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lpcp->lpbiSave = DibGetCurrentFormat (lpcs);
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// Make sure we can set the format to 16 bit RGB
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if(dwError = videoConfigure( lpcs->hVideoIn, DVM_FORMAT,
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VIDEO_CONFIGURE_SET, NULL,
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(LPBITMAPINFOHEADER)&lpcp->bi16, sizeof(BITMAPINFOHEADER),
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NULL, NULL ) ) {
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goto PalInitError;
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}
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// Put everything back the way it was
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if (dwError = videoConfigure( lpcs->hVideoIn, DVM_FORMAT,
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VIDEO_CONFIGURE_SET, NULL,
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(LPBITMAPINFOHEADER)lpcp->lpbiSave, lpcp->lpbiSave->bmiHeader.biSize,
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NULL, NULL )) {
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goto PalInitError;
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}
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PalInitError:
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return dwError;
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}
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//
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// Free resources used for palette capture
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//
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DWORD CapturePaletteFini (LPCAPSTREAM lpcs, LPCAPPAL lpcp)
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{
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if (lpcp->lpBits)
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GlobalFreePtr (lpcp->lpBits);
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if (lpcp->lp16to8)
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GlobalFreePtr (lpcp->lp16to8);
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if (lpcp->lpHistogram)
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FreeHistogram(lpcp->lpHistogram);
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if (lpcp->lpbiSave)
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GlobalFreePtr (lpcp->lpbiSave);
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return DV_ERR_OK;
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}
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//
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// CapturePaletteFrames() The workhorse of capture palette.
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//
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DWORD CapturePaletteFrames (LPCAPSTREAM lpcs, LPCAPPAL lpcp, int nCount)
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{
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int j;
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DWORD dwError;
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// switch to RGB16 format
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if (dwError = videoConfigure( lpcs->hVideoIn,
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DVM_FORMAT,
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VIDEO_CONFIGURE_SET, NULL,
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(LPBITMAPINFOHEADER)&lpcp->bi16, sizeof(BITMAPINFOHEADER),
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NULL, NULL ))
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goto CaptureFramesError;
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for (j = 0; j < nCount; j++){
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// Get a frame
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dwError = videoFrame(lpcs->hVideoIn, &lpcp->vHdr);
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// Let the user see it
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InvalidateRect (lpcs->hwnd, NULL, TRUE);
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UpdateWindow (lpcs->hwnd);
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// Histogram it
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DibHistogram(&lpcp->bi16, lpcp->lpBits, 0, 0, -1, -1, lpcp->lpHistogram);
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lpcp->wNumFrames++;
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}
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dwError = videoConfigure( lpcs->hVideoIn,
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DVM_FORMAT,
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VIDEO_CONFIGURE_SET, NULL,
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(LPBITMAPINFOHEADER)lpcp->lpbiSave,
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lpcp->lpbiSave->bmiHeader.biSize,
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NULL, NULL );
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// videoFrame( lpcs->hVideoIn, &lpcs->VidHdr );
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CaptureFramesError:
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return dwError;
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}
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//
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// CapturePaletteAuto() capture a palette from the video source
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// without user intervention.
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// Returns TRUE on success, FALSE on error
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//
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BOOL CapturePaletteAuto (LPCAPSTREAM lpcs, int nCount, int nColors)
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{
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HPALETTE hpal;
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HCURSOR hOldCursor;
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DWORD dwError = DV_ERR_OK;
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CAPPAL cappal;
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LPCAPPAL lpcp;
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lpcp = &cappal;
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if (nColors == 0)
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nColors = 256;
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lpcp->wNumColors = min (nColors, 256);
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if (nCount <= 0) // Bug 175
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nCount = 1;
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if (dwError = CapturePaletteInit (lpcs, lpcp))
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goto PalAutoExit;
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hOldCursor = SetCursor(lpcs->hWaitCursor);
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CapturePaletteFrames (lpcs, lpcp, nCount);
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/* we grabbed a frame, time to compute a palette */
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statusUpdateStatus(lpcs, IDS_CAP_STAT_OPTPAL_BUILD);
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// The HPALETTE returned in the following becomes
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// our "global" palette, hence is not deleted here.
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hpal = HistogramPalette(lpcp->lpHistogram, lpcp->lp16to8, lpcp->wNumColors);
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// Send driver both the pal and xlate table
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PalSendPaletteToDriver(lpcs, hpal, (LPBYTE)lpcp->lp16to8 );
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videoFrame( lpcs->hVideoIn, &lpcs->VidHdr ); // Update the display with a new image
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SetCursor(hOldCursor);
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InvalidateRect(lpcs->hwnd, NULL, TRUE);
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UpdateWindow(lpcs->hwnd);
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lpcs->fUsingDefaultPalette = FALSE;
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PalAutoExit:
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CapturePaletteFini (lpcs, lpcp);
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statusUpdateStatus(lpcs, NULL);
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// If an error happened, display it
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if (dwError)
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errorDriverID (lpcs, dwError);
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return (dwError == DV_ERR_OK);
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}
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//
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// CapturePaletteManual() capture a palette from the video source
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// with user intervention.
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// fGrab is TRUE on all but the last frame captured
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// Returns TRUE on success, FALSE on error
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//
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BOOL CapturePaletteManual (LPCAPSTREAM lpcs, BOOL fGrab, int nColors)
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{
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HPALETTE hpal;
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HCURSOR hOldCursor;
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LPCAPPAL lpcp;
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DWORD dwError = DV_ERR_OK;
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hOldCursor = SetCursor(lpcs->hWaitCursor);
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// We're initializing for the first time, so alloc everything
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if (lpcs->lpCapPal == NULL) {
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if (lpcp = (LPCAPPAL) GlobalAllocPtr (GHND, sizeof(CAPPAL))) {
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lpcs->lpCapPal = lpcp;
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if (nColors == 0)
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nColors = 256;
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lpcp->wNumColors = min (nColors, 256);
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dwError = CapturePaletteInit (lpcs, lpcp);
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}
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else
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dwError = IDS_CAP_OUTOFMEM;
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}
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lpcp = lpcs->lpCapPal;
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if (dwError != DV_ERR_OK)
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goto PalManualExit;
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// Add a frame to the histogram
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// Handle the case of telling us to stop before we ever started
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if (fGrab || !fGrab && (lpcp->wNumFrames == 0)) {
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CapturePaletteFrames (lpcs, lpcp, 1);
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lpcs->fUsingDefaultPalette = FALSE;
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}
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// All done, send the new palette to the driver
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if (!fGrab) {
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statusUpdateStatus(lpcs, IDS_CAP_STAT_OPTPAL_BUILD);
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// The HPALETTE returned in the following becomes
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// our "global" palette, hence is not deleted here.
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hpal = HistogramPalette(lpcp->lpHistogram,
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lpcp->lp16to8, lpcp->wNumColors);
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// Send driver both the pal and xlate table
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PalSendPaletteToDriver(lpcs, hpal, (LPBYTE)lpcp->lp16to8 );
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}
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videoFrame( lpcs->hVideoIn, &lpcs->VidHdr ); // Update the display with a new image
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InvalidateRect(lpcs->hwnd, NULL, TRUE);
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UpdateWindow(lpcs->hwnd);
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PalManualExit:
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if (!fGrab || (dwError != DV_ERR_OK)) {
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if (lpcp != NULL) {
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CapturePaletteFini (lpcs, lpcp);
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GlobalFreePtr (lpcp);
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lpcs->lpCapPal = NULL;
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}
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}
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SetCursor(hOldCursor);
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statusUpdateStatus(lpcs, NULL);
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// If an error happened, display it
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if (dwError) {
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errorUpdateError (lpcs, (WORD) dwError);
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lpcs-> dwReturn = dwError;
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}
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return (dwError == DV_ERR_OK);
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}
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/*--------------------------------------------------------------+
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| fileSavePalette - save the current palette in a file |
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| |
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+--------------------------------------------------------------*/
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BOOL FAR PASCAL fileSavePalette(LPCAPSTREAM lpcs, LPSTR lpszFileName)
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{
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HPALETTE hpal;
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HMMIO hmmio;
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WORD w;
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HCURSOR hOldCursor;
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MMCKINFO ckRiff;
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MMCKINFO ck;
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int nColors;
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FCLOGPALETTE pal;
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BOOL fOK = FALSE;
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if ((hpal = lpcs->hPalCurrent) == NULL)
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return FALSE;
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hmmio = mmioOpen(lpszFileName, NULL, MMIO_WRITE);
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if( !hmmio ) {
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/* try and create */
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hmmio = mmioOpen(lpszFileName, NULL, MMIO_CREATE | MMIO_WRITE);
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if( !hmmio ) {
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/* find out if the file was read only or we are just */
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/* totally hosed up here. */
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hmmio = mmioOpen(lpszFileName, NULL, MMIO_READ);
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if (hmmio){
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/* file was read only, error on it */
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errorUpdateError (lpcs, IDS_CAP_READONLYFILE, (LPSTR)lpszFileName);
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mmioClose(hmmio, 0);
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return FALSE;
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} else {
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/* even weirder error has occured here, give CANTOPEN */
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errorUpdateError (lpcs, IDS_CAP_CANTOPEN, (LPSTR) lpszFileName);
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return FALSE;
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}
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}
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}
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hOldCursor = SetCursor( lpcs-> hWaitCursor );
|
|
|
|
/* Seek to beginning of file, so we can write the header. */
|
|
mmioSeek(hmmio, 0, SEEK_SET);
|
|
|
|
/* Create RIFF chunk */
|
|
ckRiff.fccType = mmioFOURCC('P','A','L',' ');
|
|
if(mmioCreateChunk (hmmio,&ckRiff,MMIO_CREATERIFF)) {
|
|
goto FileError;
|
|
}
|
|
|
|
/* Create Palette chunk */
|
|
ck.cksize = 0;
|
|
ck.ckid = mmioFOURCC('d','a','t','a');
|
|
if(mmioCreateChunk(hmmio,&ck,0)) {
|
|
goto FileError;
|
|
}
|
|
|
|
// Get the palette data here
|
|
GetObject(hpal, sizeof(int), (LPVOID)&nColors);
|
|
|
|
pal.palVersion = 0x0300;
|
|
pal.palNumEntries = nColors;
|
|
|
|
GetPaletteEntries(hpal, 0, nColors, pal.palPalEntry);
|
|
|
|
// Calc the size of the logpalette
|
|
// which is the sizeof palVersion + sizeof palNumEntries + colors
|
|
w = sizeof (WORD) + sizeof (WORD) + nColors * sizeof (PALETTEENTRY);
|
|
|
|
// Write out the palette
|
|
if(mmioWrite(hmmio, (LPSTR)&pal, (DWORD) w) != (LONG) w) {
|
|
goto FileError;
|
|
}
|
|
|
|
if(mmioAscend(hmmio, &ck, 0)) {
|
|
goto FileError;
|
|
}
|
|
|
|
if(mmioAscend(hmmio, &ckRiff, 0)) {
|
|
goto FileError;
|
|
}
|
|
|
|
fOK = TRUE;
|
|
|
|
FileError:
|
|
mmioClose( hmmio, 0 );
|
|
|
|
SetCursor( hOldCursor );
|
|
|
|
if (!fOK)
|
|
errorUpdateError (lpcs, IDS_CAP_ERRORPALSAVE, (LPSTR) lpszFileName);
|
|
|
|
return fOK;
|
|
}
|
|
|
|
|
|
/*--------------------------------------------------------------+
|
|
| fileOpenPalette - use a new palette from the specified file |
|
|
| |
|
|
+--------------------------------------------------------------*/
|
|
BOOL FAR PASCAL fileOpenPalette(LPCAPSTREAM lpcs, LPSTR lpszFileName)
|
|
{
|
|
HPALETTE hpal;
|
|
HMMIO hmmio;
|
|
WORD w;
|
|
HCURSOR hOldCursor;
|
|
MMCKINFO ckRiff;
|
|
MMCKINFO ck;
|
|
FCLOGPALETTE pal;
|
|
BOOL fOK = FALSE;
|
|
|
|
if ((hpal = lpcs->hPalCurrent) == NULL)
|
|
return FALSE;
|
|
|
|
hmmio = mmioOpen(lpszFileName, NULL, MMIO_READ);
|
|
if( !hmmio ) {
|
|
errorUpdateError (lpcs, IDS_CAP_ERRORPALOPEN, (LPSTR) lpszFileName);
|
|
return FALSE;
|
|
}
|
|
|
|
hOldCursor = SetCursor( lpcs-> hWaitCursor );
|
|
|
|
/* Seek to beginning of file, so we can read the header. */
|
|
mmioSeek(hmmio, 0, SEEK_SET);
|
|
|
|
/* Find the RIFF chunk */
|
|
ckRiff.fccType = mmioFOURCC('P','A','L',' ');
|
|
if(mmioDescend (hmmio, &ckRiff, NULL, MMIO_FINDRIFF)) {
|
|
goto PalOpenError;
|
|
}
|
|
|
|
/* Find the data chunk */
|
|
ck.cksize = 0;
|
|
ck.ckid = mmioFOURCC('d','a','t','a');
|
|
if(mmioDescend (hmmio, &ck, &ckRiff, MMIO_FINDCHUNK)) {
|
|
goto PalOpenError;
|
|
}
|
|
|
|
// First read just the Version and number of entries
|
|
// which is the sizeof palVersion + sizeof palNumEntries
|
|
w = sizeof (WORD) + sizeof (WORD);
|
|
if(mmioRead(hmmio, (LPSTR)&pal, (DWORD) w) != (LONG) w) {
|
|
goto PalOpenError;
|
|
}
|
|
|
|
// Do a bit of checking
|
|
if ((pal.palVersion != 0x0300) || (pal.palNumEntries > 256))
|
|
goto PalOpenError;
|
|
|
|
// Now get the actual palette data
|
|
// which is the sizeof palVersion + sizeof palNumEntries
|
|
w = pal.palNumEntries * sizeof (PALETTEENTRY);
|
|
if(mmioRead(hmmio, (LPSTR)&pal.palPalEntry, (DWORD) w) != (LONG) w) {
|
|
goto PalOpenError;
|
|
}
|
|
|
|
if (hpal = CreatePalette ((LPLOGPALETTE) &pal)) {
|
|
PalSendPaletteToDriver (lpcs, hpal, NULL /*lpXlateTable */);
|
|
fOK = TRUE;
|
|
}
|
|
|
|
videoFrame( lpcs->hVideoIn, &lpcs->VidHdr ); // grab a new frame
|
|
|
|
PalOpenError:
|
|
mmioClose( hmmio, 0 );
|
|
|
|
SetCursor( hOldCursor );
|
|
InvalidateRect(lpcs->hwnd, NULL, TRUE);
|
|
UpdateWindow(lpcs->hwnd); // update the display with new frame
|
|
|
|
if (!fOK)
|
|
errorUpdateError (lpcs, IDS_CAP_ERRORPALOPEN, (LPSTR) lpszFileName);
|
|
else
|
|
lpcs->fUsingDefaultPalette = FALSE;
|
|
|
|
return fOK;
|
|
}
|
|
|
|
|