/*

    File:       MovieProc.c

    Contains:   Code demonstrating how to use a movie drawing callback procedure

    Written by: Apple Developer Technical support

    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 AppleÕs

                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

*/

#include "MovieProc.h"

#include <Fonts.h>

// GLOBALS

Movie                   gMovie = NULL;

WindowRef               gWindow = NULL;

Rect                    gMovieRect = {0, 0, 0, 0};

TimeValue               gMovieDuration = 0L;

long                    gTickCount = 0L;

long                    gSampleCount = 0L;

Rect                    gTimeDurationRect = { 5, 5, 10 ,110};

MovieDrawingCompleteUPP gMovieProc = NULL;

// ______________________________________________________________________

//¥  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();

    gTickCount = TickCount();

    gSampleCount = 1L;

    //¥ Event loop.

    for(;;) {

        WaitNextEvent(everyEvent, &anEvent, 1, NULL);

        MoviesTask(gMovie, 0);

        if (IsMovieDone(gMovie))

        {

            if (!fpsStatsDrawn)     // draw fps stats only once

            {

                fpsStatsDrawn = true;

                gTickCount = TickCount() - gTickCount;

                DrawFpsStats(gTickCount);

                QTUDrawVideoFrameAtTime(gMovie, GetMovieTime(gMovie, 0));  // nudge one last time to make sure last frame is drawn.

            }

        }

        if(anEvent.what == mouseDown)

            break;

        if(anEvent.what == keyDown) {

            DrawFpsStats(0L); 

            fpsStatsDrawn = false;

            GoToBeginningOfMovie(gMovie); 

            gTickCount = TickCount();

            gSampleCount = 1L;

            StartMovie(gMovie); 

        }

    }

    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};

    CGrafPtr    aSavedPort = NULL;

    GDHandle    aSavedGDevice = NULL;

    //¥ 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;

    //¥ Install the movie drawing complete callback.

    gMovieProc = NewMovieDrawingCompleteUPP(&MyQTMovieDrawingCompleteProc);

    SetMovieDrawingCompleteProc(gMovie, movieDrawingCallWhenChanged, gMovieProc, 0);

    anErr = GetMoviesError(); DebugAssert(anErr == noErr); if(anErr) goto Closure;

    //¥ Get movie duration.

    gMovieDuration = GetMovieDuration(gMovie);

Closure:

    return anErr;

}

// ______________________________________________________________________

//¥ MyTrackTransferProc -- Callback called when movie toolbox draws to GWorld.

pascal OSErr MyQTMovieDrawingCompleteProc(Movie theMovie, long refCon) {

#pragma unused (theMovie)

#pragma unused (refCon)

    OSErr           anErr = noErr;

    Str255          tempString;

    long            percentage = 0L;

    Rect            eraseRect = { 12, kDrawTextX - 5, 24, kDrawTextX + 25};

    //¥ Bounce the sample code (needed for later statistics).

    gSampleCount++;

    //¥ Draw progress bar into main screen. 

    PenSize(1,1); ForeColor(blackColor); FrameRect(&gTimeDurationRect);

    percentage = 100L * GetMovieTime(gMovie, NULL) / gMovieDuration;

    MoveTo(5,5); ForeColor(yellowColor); PenSize(4,4); LineTo( percentage +5L, 5); 

    //¥ Draw percentage numbers.

    EraseRect(&eraseRect);

    MoveTo(kDrawTextX, 20); TextFace(bold); TextSize(9); 

    NumToString(percentage, tempString);  ForeColor(redColor); DrawString(tempString); 

    MoveTo(kDrawTextX + 20, 20); DrawString("\p%"); ForeColor(blackColor);

    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.");

}