//////////

//

//  File:       MakeEffectMovie.c

//

//  Contains:   QuickTime video effect support for QuickTime movies.

//              This file is used for BOTH MacOS and Windows.

//

//  Written by: Tim Monroe

//              Based (heavily!) on the previous MakeEffectMovie code written by Sam Bushell,

//              which was based on ConvertToMovie.c from ConvertToMovie Jr. sample code.

//

//  Copyright:  © 1997-1999 by Apple Computer, Inc., all rights reserved.

//

//  Change History (most recent first):

//

//     <7>      03/20/00    rtm     made changes to get things running under CarbonLib

//     <6>      03/03/99    rtm     added support for MakeImageDescriptionForEffect (QT 4.0 and later)

//     <5>      03/12/98    rtm     added global flag gDoneWithDialog to fix Windows dialog box problems

//     <4>      02/28/98    rtm     revised event/message handling following QTShowEffect.c

//     <3>      01/08/98    rtm     sync'ed with latest code from Sam: reworked QTEffects_GetFirstVideoTrackInMovie

//                                  to use GetMovieIndTrackType and fixed time scale setting code; added global flag

//                                  gCopyMovieMedia and menu commands to set that flag

//     <2>      11/21/97    rtm     factored out QTEffects_GetFirstVideoTrackInMovie;

//                                  reworked event-loop processing: changed QTEffects_MakeEffectMovieForSources into

//                                  QTEffects_DisplayDialogForSources and QTEffects_RespondToDialogSelection.

//     <1>      11/06/97    rtm     first file; integrated existing code with shell framework;

//                                  added endian macros where appropriate

//     

//  This application takes the video tracks from zero, one, or two movies 

//  and creates a new movie with an effects track for them.

//

//  Try it out: drag two short movies of the same size onto the application icon.

//  The QuickTime effects dialog will appear and you can select an effect to transition

//  from the first movie to the second. Or, drag a single movie onto the application icon

//  and you'll get an effects dialog for one-source effects.

//

//  You can also launch the application and choose the Make Effect Movie menu command in

//  the Test menu. You'll get a file-opening dialog box for each movie you want to apply

//  the effects to. Just hit Cancel in the first dialog box to get zero-source effects (like fire).

//

//////////

// TO DO:

// + copy sound tracks from original movie(s); add tweening of sound tracks as effect progresses

// header files

#include "MakeEffectMovie.h"

// global variables

QTParameterDialog           gEffectsDialog = 0L;            // identifier for the standard parameter dialog box

QTAtomContainer             gEffectSample = NULL;           // effects sample

QTAtomContainer             gEffectList = NULL;

PicHandle                   gPosterA = NULL;

PicHandle                   gPosterB = NULL;

Movie                       gSrcMovies[kMaxNumSources] = {NULL, NULL};

Track                       gSrcTracks[kMaxNumSources] = {NULL, NULL};

UInt16                      gSpecCount = 0;     

Boolean                     gCopyMovieMedia = false;        // should we copy the movie media into the new effects movie?

Boolean                     gDoneWithDialog = false;        // are we done using the effects parameters dialog box?

//////////

//

// QTEffects_GetFirstVideoTrackInMovie

// Return, through the theTrack parameter, the first video track in the specified movie.

//

// Actually, we look for the first track that has the kCharacteristicCanSendVideo characteristic,

// so we can apply effects to MPEG or QD3D tracks as well.

//

// If no such track is found, return invalidTrack as the function result.

//

//////////

OSErr QTEffects_GetFirstVideoTrackInMovie (Movie theMovie, Track *theTrack)

{

    *theTrack = GetMovieIndTrackType(theMovie, 1, kCharacteristicCanSendVideo, movieTrackCharacteristic | movieTrackEnabledOnly);

    if (*theTrack == NULL)

        return(invalidTrack);

    return(noErr);

}

//////////

//

// QTEffects_DisplayDialogForSources

// Display the standard effects parameters dialog box for the movies passed in.

//

//////////

OSErr QTEffects_DisplayDialogForSources (FSSpec *theSpecList, UInt16 theSpecCount)

{

    OSErr                   myErr = noErr;

    UInt16                  myMovieIter;

    // make sure that there aren't too many sources

    if (theSpecCount > kMaxNumSources) {

        myErr = paramErr;

        goto bail;

    }

    // assign source count to a global, so QTEffects_RespondToDialogSelection has access to it

    gSpecCount = theSpecCount;      

    // open the source movies, get movies from them, and get the first video track from each movie

    for (myMovieIter = 0; myMovieIter < theSpecCount; myMovieIter++) {

        short   myRefNum;

        // open a movie file using the FSSpec and create a movie from that file

        myErr = OpenMovieFile(&theSpecList[myMovieIter], &myRefNum, 0);

        BailError(myErr);

        myErr = NewMovieFromFile(&gSrcMovies[myMovieIter], myRefNum, NULL, NULL, newMovieActive, NULL);

        BailError(myErr);

        SetMoviePlayHints(gSrcMovies[myMovieIter], hintsHighQuality, hintsHighQuality);

        // we're done with the movie file, so close it

        CloseMovieFile(myRefNum);

        // find the first video track in the source movie

        myErr = QTEffects_GetFirstVideoTrackInMovie(gSrcMovies[myMovieIter], &gSrcTracks[myMovieIter]);

        BailError(myErr);

    }

// Step 1.

// Insert "SelectAnEffect.clp" here

    // insert poster frames into dialog

    if (gSrcTracks[0] != NULL) {

        gPosterA = GetTrackPict(gSrcTracks[0], GetMoviePosterTime(gSrcMovies[0]));

        if (gPosterA != NULL) {

            QTParamPreviewRecord            myPreviewRecord;

            myPreviewRecord.sourcePicture = gPosterA;

            myPreviewRecord.sourceID = 1;

            myErr = QTStandardParameterDialogDoAction(gEffectsDialog, pdActionSetPreviewPicture, &myPreviewRecord);

        }

    }

    if (gSrcTracks[1] != NULL) {

        gPosterB = GetTrackPict(gSrcTracks[1], GetMoviePosterTime(gSrcMovies[1]));

        if (gPosterB != NULL) {

            QTParamPreviewRecord            myPreviewRecord;

            myPreviewRecord.sourcePicture = gPosterB;

            myPreviewRecord.sourceID = 2;

            myErr = QTStandardParameterDialogDoAction(gEffectsDialog, pdActionSetPreviewPicture, &myPreviewRecord);

        }

    }

    // now, the frontmost window is the standard effects parameter dialog box;

    // on the Mac, we call QTEffects_HandleEffectsDialogEvents in our main event loop

    // to find and process events targeted at the effects parameter dialog box; on Windows,

    // we need to use a different strategy: we install a modeless dialog callback procedure

    // that is called internally by QTML

#if TARGET_OS_WIN32

    gDoneWithDialog = false;

    // force the dialog box to be drawn

    {

        EventRecord         myEvent = {0};

        QTEffects_EffectsDialogCallback(&myEvent, FrontWindow(), 0);

    }

    SetModelessDialogCallbackProc(FrontWindow(), (QTModelessCallbackUPP)QTEffects_EffectsDialogCallback);

    QTMLSetWindowWndProc(FrontWindow(), QTEffects_CustomDialogWndProc);

#endif

bail:

    return(myErr);

}

//////////

//

// QTEffects_RespondToDialogSelection

// If theErr is codecParameterDialogConfirm, make an effects movie.

// If theErr is userCanceledErr, do any necessary clean up.

//

//////////

void QTEffects_RespondToDialogSelection (OSErr theErr)

{

    short                   myMovieRefNum = 0;

    short                   myResID = movieInDataForkResID;

    Boolean                 myDialogWasCancelled = false;

    OSType                  myEffectCode;

    Fixed                   videoTrackFXWidth, videoTrackFXHeight;

    TimeScale               myMovieTimeScale = 600; 

    TimeValue               myEffectDuration = 0;

    TimeValue               mySampleTime = 0;

    FSSpec                  myFile;

    Boolean                 myIsSelected = false;

    Boolean                 myIsReplacing = false;  

    StringPtr               myPrompt = QTUtils_ConvertCToPascalString(kEffectsSaveMoviePrompt);

    StringPtr               myFileName = QTUtils_ConvertCToPascalString(kEffectsSaveMovieFileName);

    Movie                   myDestMovie = NULL;

    Track                   videoTracks[kMaxNumSources] = {NULL, NULL};

    Track                   videoTrackFX = NULL;

    Media                   videoMediaFX = NULL;

    UInt16                  myMovieIter;

    long                    myFlags = createMovieFileDeleteCurFile | createMovieFileDontCreateResFile;

    OSErr                   myErr = noErr;

    // standard parameter box has been dismissed, so remember that fact

    gEffectsDialog = 0L;

    myDialogWasCancelled = (theErr == userCanceledErr);

    // we're finished with the effect list and movie posters    

    QTDisposeAtomContainer(gEffectList);

    if (gPosterA != NULL)

        KillPicture(gPosterA);

    if (gPosterB != NULL)

        KillPicture(gPosterB);

    if (myDialogWasCancelled)

        goto bail;

// Step 2.

// Insert "AddSourceName.clp" here

// Step 3.

// Insert "GetWhatKindOfEffect.clp" here

    // ask the user for the name of the new movie file

    QTFrame_PutFile(myPrompt, myFileName, &myFile, &myIsSelected, &myIsReplacing);

    if (!myIsSelected)

        goto bail;              // deal with user cancelling

    // create a movie file for the destination movie

    myErr = CreateMovieFile(&myFile, FOUR_CHAR_CODE('TVOD'), smSystemScript, myFlags, &myMovieRefNum, &myDestMovie);

    BailError(myErr);

    // copy the user data and settings from the source to the destination movie;

    // these settings include information like user data

    if (gSpecCount > 0)

        CopyMovieSettings(gSrcMovies[0], myDestMovie);

    // convert all the movies to have a common time scale;

    // we pick the largest time scale out of all the source movies, with a minimum of 600

    myMovieTimeScale = 600;

    for (myMovieIter = 0; myMovieIter < gSpecCount; myMovieIter++) {

        if (myMovieTimeScale < GetMovieTimeScale(gSrcMovies[myMovieIter]))

            myMovieTimeScale = GetMovieTimeScale(gSrcMovies[myMovieIter]);

    }

    for (myMovieIter = 0; myMovieIter < gSpecCount; myMovieIter++) {

        if (myMovieTimeScale != GetMovieTimeScale(gSrcMovies[myMovieIter]))

            SetMovieTimeScale(gSrcMovies[myMovieIter], myMovieTimeScale);

    }

    // the effect duration is the minimum of the length of the tracks

    if (gSpecCount == 0)

        myEffectDuration = myMovieTimeScale * 10;

    else

        myEffectDuration = GetTrackDuration(gSrcTracks[0]);

    for (myMovieIter = 1; myMovieIter < gSpecCount; myMovieIter++) {

        if (myEffectDuration > GetTrackDuration(gSrcTracks[myMovieIter]))

            myEffectDuration = GetTrackDuration(gSrcTracks[myMovieIter]);

    }

    // default size when there are no video tracks

    videoTrackFXWidth = 160L << 16;

    videoTrackFXHeight = 120L << 16;

    for (myMovieIter = 0; myMovieIter < kMaxNumSources; myMovieIter++) {

        videoTracks[myMovieIter] = NULL;

    }

    // make the video tracks

    for (myMovieIter = 0; myMovieIter < gSpecCount; myMovieIter++) {

        Fixed   mySrcTrackWidth, mySrcTrackHeight;

        OSType  mySrcMediaType = 0;

        Media   videoMedia;

        // videoTracks[n] is a clone of gSrcTracks[n]

        GetTrackDimensions(gSrcTracks[myMovieIter], &mySrcTrackWidth, &mySrcTrackHeight);

        if ((myMovieIter == 0) || (videoTrackFXWidth < mySrcTrackWidth))

                videoTrackFXWidth = mySrcTrackWidth;

        if ((myMovieIter == 0) || (videoTrackFXHeight < mySrcTrackHeight))

                videoTrackFXHeight = mySrcTrackHeight;

        GetMediaHandlerDescription(GetTrackMedia(gSrcTracks[myMovieIter]), &mySrcMediaType, NULL, NULL);

        videoTracks[myMovieIter] = NewMovieTrack(myDestMovie, mySrcTrackWidth, mySrcTrackHeight, 0);

        BailNil(videoTracks[myMovieIter]);

        videoMedia = NewTrackMedia(videoTracks[myMovieIter], mySrcMediaType, myMovieTimeScale, NULL, 0);

        BailNil(videoMedia);

        if (gCopyMovieMedia) {

            myErr = BeginMediaEdits(videoMedia);

            BailError(myErr);

        }

        myErr = CopyTrackSettings(gSrcTracks[myMovieIter], videoTracks[myMovieIter]);

        BailError(myErr);

        myErr = InsertTrackSegment(gSrcTracks[myMovieIter], videoTracks[myMovieIter], 0, myEffectDuration, 0);

        BailError(myErr);

        if (gCopyMovieMedia) {

            myErr = EndMediaEdits(videoMedia);

            BailError(myErr);

        }

    }

// Step 4.

// Insert "CreateEffectsTrack.clp" here

    {

// Step 5.

// Insert "CreateEffectDescription.clp" here

// Step 6.

// Insert "AddEffectsDescription.clp" here

    }

    {

// Step 7.

// Insert "CreateInputMap.clp" here

// Step 8.

// Insert "AddInputMap.clp" here

    }

// Step 9.

// Insert "AddMovieResource.clp" here

    CloseMovieFile(myMovieRefNum);

    for (myMovieIter = 0; myMovieIter < gSpecCount; myMovieIter++)

        DisposeMovie(gSrcMovies[myMovieIter]);

    DisposeMovie(myDestMovie);

bail:

    free(myPrompt);

    free(myFileName);

    return;

}

#if TARGET_OS_WIN32

//////////

//

// QTEffects_EffectsDialogCallback

// This function is called by QTML when it processes events for the standard or custom effects parameter dialog box.

// 

//////////

static void QTEffects_EffectsDialogCallback (EventRecord *theEvent, DialogRef theDialog, DialogItemIndex theItemHit)

{

    QTParamDialogEventRecord    myRecord;

    myRecord.theEvent = theEvent;

    myRecord.whichDialog = theDialog;

    myRecord.itemHit = theItemHit;

    if (gEffectsDialog != 0L) {

        QTStandardParameterDialogDoAction(gEffectsDialog, pdActionModelessCallback, &myRecord);

        // see if the event is meant for the effects parameter dialog box

        QTEffects_HandleEffectsDialogEvents(theEvent, theItemHit);

    }

}

//////////

//

// QTEffects_CustomDialogWndProc

// Handle messages for the custom effects parameters dialog box.

// 

//////////

LRESULT CALLBACK QTEffects_CustomDialogWndProc (HWND theWnd, UINT theMessage, UINT wParam, LONG lParam)

{

    EventRecord         myEvent = {0};

    if (!gDoneWithDialog && (theMessage == 0x7FFF))

        QTEffects_EffectsDialogCallback(&myEvent, GetNativeWindowPort(theWnd), 0);

    return(DefWindowProc(theWnd, theMessage, wParam, lParam));

}

#endif

//////////

//

// QTEffects_HandleEffectsDialogEvents

// Process events that might be targeted at the standard effects parameter dialog box.

// Return true if the event was completely handled.

// 

//////////

Boolean QTEffects_HandleEffectsDialogEvents (EventRecord *theEvent, DialogItemIndex theItemHit)

{

    Boolean         isHandled = false;

    OSErr           myErr = noErr;

    // pass the event to the standard effects parameter dialog box handler

    myErr = QTIsStandardParameterDialogEvent(theEvent, gEffectsDialog);

    // the result from QTIsStandardParameterDialogEvent tells us how to respond next

    switch (myErr) {

        case codecParameterDialogConfirm:

        case userCanceledErr:

            // the user clicked the OK or Cancel button; dismiss the dialog box and respond accordingly

            gDoneWithDialog = true;

            QTStandardParameterDialogDoAction(gEffectsDialog, pdActionConfirmDialog, NULL);

            QTDismissStandardParameterDialog(gEffectsDialog);

            gEffectsDialog = 0L;

            QTEffects_RespondToDialogSelection(myErr);

            isHandled = true;

            break;

        case noErr:

            // the event was completely handled by QTIsStandardParameterDialogEvent

            isHandled = true;

            break;

        case featureUnsupported:

            // the event was not handled by QTIsStandardParameterDialogEvent;

            // let the event be processed normally

            isHandled = false;

            break;

        default:

            // the event was not handled by QTIsStandardParameterDialogEvent;

            // do not let the event be processed normally

            isHandled = true;

            break;

    }

    return(isHandled);

}

//////////

//

// QTEffects_PromptUserForFilesAndMakeEffect

// Let the user select some movies, then apply the effect to them.

//

// If the user cancels the first file-open dialog box, there are zero sources.

// If the user cancels the second file-open dialog box, there is one source.

// 

//////////

void QTEffects_PromptUserForFilesAndMakeEffect (void)

{

    QTFrameFileFilterUPP    myFileFilterUPP = NULL;

    FSSpec                  mySpecs[kMaxNumSources];

    int                     mySpecCount;

    OSType                  myTypeList[] = {kQTFileTypeMovie};

    short                   myNumTypes = 1;

    OSErr                   myErr = noErr;

#if TARGET_OS_MAC

    myNumTypes = 0;

#endif

    myFileFilterUPP = QTFrame_GetFileFilterUPP((ProcPtr)QTFrame_FilterFiles);

    // ask for up to kMaxNumSources movie files;

    // accept early cancels; they just mean there are fewer input movies

    mySpecCount = 0;

    while (mySpecCount < kMaxNumSources) {

        FSSpec  myFSSpec;

        myTypeList[0] = MovieFileType;

        myErr = QTFrame_GetOneFileWithPreview(myNumTypes, (QTFrameTypeListPtr)myTypeList, &myFSSpec, myFileFilterUPP);

        if (myErr != noErr)

            break;  // the user doesn't want any more source movies

        // save the FSSpec from the reply information

        mySpecs[mySpecCount] = myFSSpec;

        mySpecCount++;

    }

    QTEffects_DisplayDialogForSources(mySpecs, mySpecCount);

    if (myFileFilterUPP != NULL)

        DisposeNavObjectFilterUPP(myFileFilterUPP);

}