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<pre class="sourcecodebox">/* File: TrackGWorlds.c Contains: Written by: Copyright: Copyright © 2003 by Apple Computer, Inc., All Rights Reserved. Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. In consideration of your agreement to abide by the following terms, and subject to these terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in this original Apple software (the "Apple Software"), to use, reproduce, modify and redistribute the Apple Software, with or without modifications, in source and/or binary forms; provided that if you redistribute the Apple Software in its entirety and without modifications, you must retain this notice and the following text and disclaimers in all such redistributions of the Apple Software. Neither the name, trademarks, service marks or logos of Apple Computer, Inc. may be used to endorse or promote products derived from the Apple Software without specific prior written permission from Apple. Except as expressly stated in this notice, no other rights or licenses, express or implied, are granted by Apple herein, including but not limited to any patent rights that may be infringed by your derivative works or by other works in which the Apple Software may be incorporated. The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Change History (most recent first): 3/18/2003 srk Carbonized 8/17/1999 Karl Groethe Updated for Metrowerks Codewarror Pro 2.1 */// INCLUDES#include "TrackGWorlds.h"#include <Fonts.h>// GLOBALSMovie gMovie = NULL;WindowRef gWindow = NULL;Rect gMovieRect = {0, 0, 0, 0};GWorldPtr gTrackGWorld = NULL; // Note that in a real program this handle should be purged later if not used.GDHandle gTrackGDevice = NULL;GWorldPtr gComposeGWorld = NULL; // Note that in a real program this handle should be purged later if not used.GDHandle gComposeGDevice = NULL;TimeValue gMovieDuration = 0L;long gTickCount = 0L;long gSampleCount = 0L;Rect gTimeDurationRect = { 5, 5, 10 ,110};// ______________________________________________________________________//* MAIN -- Starting point.int main(void) { EventRecord anEvent; Boolean fpsStatsDrawn = false; //* Initialize the needed parts. InitMacEnvironment(6); InitializeQTEnvironment(); if ( InitializeMovie() != noErr ) ExitToShell(); // we had problems with the movie. //* Draw basic strings inside the window. DrawFpsStats(0L); DrawMovieFpsStats(); DrawUsageInformation(); //* Event loop. for(;;) { WaitNextEvent(everyEvent, &anEvent, 1, NULL); if(anEvent.what == mouseDown) break; if(anEvent.what == keyDown) { DrawFpsStats(0L); fpsStatsDrawn = false; SetGWorld(GetWindowPort(gWindow), NULL); SetMovieGWorld(gMovie, GetWindowPort(gWindow), NULL); GoToBeginningOfMovie(gMovie); gTickCount = TickCount(); gSampleCount = 1L; StartMovie(gMovie); } if (!IsMovieDone(gMovie)) { MoviesTask(gMovie, 0); } else { if (!fpsStatsDrawn) // draw fps stats only once { fpsStatsDrawn = true; gTickCount = TickCount() - gTickCount; DrawFpsStats(gTickCount); } } } return 0;}// ______________________________________________________________________//* InitMacEnvironment -- Initialize the Mac Toolbox.void InitMacEnvironment(long nMasters) { long i; for(i = 0; i <nMasters; i++) MoreMasters(); FlushEvents(everyEvent, 0); InitCursor();}// ______________________________________________________________________//* InitializeQTEnvironment -- Initialize the QuickTime movie toolbox parts.void InitializeQTEnvironment(void) { OSErr anErr = noErr; if( !QTUIsQuickTimeInstalled() ) { DebugStr("\pThe QuickTime extension is not present in this system"); ExitToShell(); } if( (QTUGetQTVersion() >> 16 ) < 0x200 ) { DebugStr("\pWe need QT 2.0 or higher due to APIs used in this sample, consult the sources (exit)."); ExitToShell(); } #if powerc if( !QTUIsQuickTimeCFMInstalled() ) { DebugStr("\pThe QuickTime PowerPlug extension is not available (exit)"); ExitToShell(); } #endif anErr = EnterMovies(); DebugAssert(anErr == noErr); if(anErr != noErr) { DebugStr("\pProblems with Entermovies, returning errors (exit)"); ExitToShell(); }}// ______________________________________________________________________//* InitializeMovie -- Initialize needed movie parts for the offscreen handling.OSErr InitializeMovie(void) { OSErr anErr = noErr; Rect windowBounds = { kWindowYStart, kWindowXStart, kWindowHeigth, kWindowLength}; Track firstVideoTrack = NULL; Media firstVideoMedia = NULL; short mediaPixelDepth = 0; short monitorPixelDepth = 0; Rect trackRect = {0, 0, 0, 0}; CGrafPtr aSavedPort = NULL; GDHandle aSavedGDevice = NULL; CTabHandle colorTable = NULL; long seed = 0L; //* Create the window we will use. anErr = CreateNewWindow( kDocumentWindowClass, kWindowCloseBoxAttribute, &windowBounds, &gWindow ); DebugAssert(anErr == noErr); ShowWindow(gWindow); // set the port to the new window SetPortWindowPort(gWindow); GetGWorld(&aSavedPort, &aSavedGDevice); //* Get the movie. anErr = QTUSimpleGetMovie(&gMovie); DebugAssert(anErr == noErr); if(anErr) goto Closure; //* Adjust the movie box values. GetMovieBox(gMovie, &gMovieRect); OffsetRect(&gMovieRect, -gMovieRect.left, -gMovieRect.top); SetMovieBox(gMovie, &gMovieRect); AlignWindow(gWindow, false, &gMovieRect, NULL); //* Specify the Movie GWorld. SetMovieGWorld(gMovie, GetWindowPort(gWindow), NULL); anErr = GetMoviesError(); DebugAssert(anErr == noErr); if(anErr) goto Closure; //* Get movie duration. gMovieDuration = GetMovieDuration(gMovie); //* Find first video track, track dimensions, pixel depth and so on (need that for the GWorld creation later). firstVideoTrack = GetMovieIndTrackType(gMovie, 1, VideoMediaType, movieTrackMediaType); // Assume we have 2.0 installed (GetMovieINdaTrackType). anErr = GetMoviesError(); DebugAssert(anErr == noErr); if(anErr || firstVideoTrack == NULL) goto Closure; anErr = QTUGetTrackRect(firstVideoTrack, &trackRect); DebugAssert(anErr == noErr); firstVideoMedia = GetTrackMedia(firstVideoTrack); DebugAssert(firstVideoMedia != NULL); mediaPixelDepth = QTUGetVideoMediaPixelDepth(firstVideoMedia, 1); monitorPixelDepth = GetPixDepth((**aSavedGDevice).gdPMap); colorTable = (**(**aSavedGDevice).gdPMap).pmTable; // As we copy the whole colorTable, we don't need to worry about the ctSeed values, they are the same for all // three GWorlds now. We yank out the value just to show how it's done, anyway... seed = (**colorTable).ctSeed; //* Create our Track GWorlds (note that monitorDepth == 0 implies default monitor depth). // If we would use initial GWorld pixmap for something, then it also makes sense to EraseRect the contents. anErr = NewGWorld(&gComposeGWorld, monitorPixelDepth, &gMovieRect, colorTable, gComposeGDevice, 0); DebugAssert (anErr == noErr); if(anErr) goto Closure; anErr = NewGWorld(&gTrackGWorld, mediaPixelDepth, &gMovieRect, NULL, gTrackGDevice, 0); DebugAssert (anErr == noErr); //* Put together our Track GWorld environment. SetTrackGWorld(firstVideoTrack, gTrackGWorld, gTrackGDevice, NewTrackTransferUPP(MyTrackTransferProc), 0L); //* The following commented line could be used if we want the track transfer proc to trigger, but no redirection of the track GWorld. // SetTrackGWorld(firstVideoTrack, NULL, NULL, NewTrackTransferProc(MyTrackTransferProc), 0L); anErr = GetMoviesError(); DebugAssert(anErr == noErr); if(anErr) goto Closure; //* Update the movie so that the first frame is drawn. anErr = QTUDrawVideoFrameAtTime(gMovie, 0L); DebugAssert(anErr == noErr); Closure: return anErr;}// ______________________________________________________________________//* MyTrackTransferProc -- Callback called when movie toolbox draws to GWorld.pascal OSErr MyTrackTransferProc(Track theTrack, long refCon) {#pragma unused (theTrack)#pragma unused (refCon) OSErr anErr = noErr; PixMapHandle trackPixMap = NULL; PixMapHandle composePixMap = NULL; CGrafPtr aSavedPort = NULL; GDHandle aSavedGDevice = NULL; Str255 tempString; long percentage = 0L; //* Bounce the sample code (needed for later statistics). gSampleCount++; //* Get and lock the GWorld pixmaps. trackPixMap = GetGWorldPixMap( gTrackGWorld); if(!LockPixels(trackPixMap)) goto Closure; composePixMap = GetGWorldPixMap(gComposeGWorld); if(!LockPixels(composePixMap)) goto Closure; //* Switch over to the compose GWorld for CopyBits (the actual GWorld is already set to the correct destination (movie GWorld)). GetGWorld(&aSavedPort, &aSavedGDevice); SetGWorld( gComposeGWorld, NULL); //* Blit from Track GWorld into the compose GWorld. ForeColor(blackColor); BackColor(whiteColor); CopyBits( (BitMap *) *trackPixMap, (BitMap *) *composePixMap, &gMovieRect, &gMovieRect, srcCopy, NULL ); //* Draw progress bar into the compose GWorld. PenSize(1,1); ForeColor(whiteColor); FrameRect(&gTimeDurationRect); percentage = 100L * GetMovieTime(gMovie, NULL) / gMovieDuration; MoveTo(5,5); ForeColor(yellowColor); PenSize(4,4); LineTo( percentage +5L, 5); //* Draw percentage numbers into the main GWorld (window). MoveTo(5,20); TextFace(bold); TextSize(9); ForeColor(redColor); NumToString(percentage, tempString); DrawString(tempString); MoveTo(25,20); DrawString("\p%"); //* Blit from the composite GWorld into the main screen. SetGWorld( GetWindowPort(gWindow), NULL); ForeColor(blackColor); BackColor(whiteColor); CopyBits( (BitMap *) *composePixMap, (BitMap *)GetPortBitMapForCopyBits(GetWindowPort(gWindow)), &gMovieRect, &gMovieRect, srcCopy, NULL ); // blit from offscreen bitmap to movie track pixmap //* Restore GWorlds, unlock offscreen GWorld pixels. SetGWorld(aSavedPort, aSavedGDevice); UnlockPixels(trackPixMap); UnlockPixels(composePixMap); Closure: return anErr;}// ______________________________________________________________________//* DrawFpsStats -- Provide and draw statistics concerning how many frames were drawn per second.void DrawFpsStats(long tickCount){ Str255 theString; Rect eraseArea = {kDrawValuesY-20, kDrawValuesX -20, kDrawValuesY+20, kDrawValuesX+20}; EraseRect(&eraseArea); //* Display the fps values. MoveTo(kDrawTextX, kDrawTextY); TextFace(bold); TextSize(9); DrawString("\pFrames drawn/second:"); if(tickCount != 0L) { MoveTo(kDrawValuesX, kDrawValuesY); NumToString( (60L * gSampleCount/tickCount), theString); DrawString(theString); }}// ______________________________________________________________________//* DrawMovieFpsStats -- Get the statistics from the movie concerning frames per second, draw this.void DrawMovieFpsStats(void) { Str255 theString; long nFrames = 0L; long nSeconds = 0L; MoveTo(kDrawTextX, kDrawTextY+40); TextFace(bold); TextSize(9); DrawString("\pMovie stats, fps: "); MoveTo(kDrawValuesX, kDrawValuesY + 40); nFrames = gMovieDuration / QTUGetDurationOfFirstMovieSample(gMovie, VideoMediaType); nSeconds = gMovieDuration / GetMovieTimeScale(gMovie); NumToString( (nFrames/nSeconds), theString); DrawString(theString);}// ______________________________________________________________________//* DrawUsageInformation -- Draw instructions how to use this simple program.void DrawUsageInformation(void) { TextFace(normal); TextSize(9); MoveTo(kDrawTextX, 200); DrawString("\pHit a key to start the movie."); MoveTo(kDrawTextX, 220); DrawString("\pClick on the mouse to terminate program.");}</pre>
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