/*

    File:       TrackGWorlds.c

    Contains:   

    Written by:     

    Copyright:  Copyright © 2003 by Apple Computer, Inc., All Rights Reserved.

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    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>

// GLOBALS

Movie               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.");

}