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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
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<title>CreateMovie - /Start Code/QTVideo.c</title>
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/QuickTime/index.html">QuickTime</a> > <a href="../../samplecode/QuickTime/idxMovieCreation-date.html">Movie Creation</a> > <A HREF="javascript:location.replace('index.html');">CreateMovie</A> >
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<table width="680" border="0" cellpadding="0" cellspacing="0">
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<td><h1><div id="pagehead">CreateMovie</div></h1></td>
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<td id="scdetails">
<h2>/Start Code/QTVideo.c</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/Application Files/ComApplication.c</option>
<option value="listing2.html">/Application Files/ComApplication.h</option>
<option value="listing3.html">/Application Files/ComResource.h</option>
<option value="listing4.html">/Clippings/CreateMovie.c/AddMovieResource.txt</option>
<option value="listing5.html">/Clippings/CreateMovie.c/CreateMovieFile.txt</option>
<option value="listing6.html">/Clippings/QTFlatten.c/FlattenMovieData.txt</option>
<option value="listing7.html">/Clippings/QTSound.c/AddMediaSample.txt</option>
<option value="listing8.html">/Clippings/QTSound.c/InsertMediaIntoTrack.txt</option>
<option value="listing9.html">/Clippings/QTSound.c/NewMovieTrack.txt</option>
<option value="listing10.html">/Clippings/QTSound.c/NewTrackMedia.txt</option>
<option value="listing11.html">/Clippings/QTSound.c/SoundDescriptionVar.txt</option>
<option value="listing12.html">/Clippings/QTSound.c/TrackMediaVars.txt</option>
<option value="listing13.html">/Clippings/QTVideo.c/AddMediaSample.txt</option>
<option value="listing14.html">/Clippings/QTVideo.c/BeginMediaEdits.txt</option>
<option value="listing15.html">/Clippings/QTVideo.c/CompressImage.txt</option>
<option value="listing16.html">/Clippings/QTVideo.c/EndMediaEdits.txt</option>
<option value="listing17.html">/Clippings/QTVideo.c/GetMaxCompressionSize.txt</option>
<option value="listing18.html">/Clippings/QTVideo.c/ImageDescriptorVar.txt</option>
<option value="listing19.html">/Clippings/QTVideo.c/InsertMediaIntoTrack.txt</option>
<option value="listing20.html">/Clippings/QTVideo.c/NewMovieTrack.txt</option>
<option value="listing21.html">/Clippings/QTVideo.c/NewTrackMedia.txt</option>
<option value="listing22.html">/Clippings/QTVideo.c/TrackMediaVars.txt</option>
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<option value="listing31.html">/Common Files/WinFramework.h</option>
<option value="listing32.html">/Common Files/WinPrefix.h</option>
<option value="listing33.html">/Completed Lab/CreateMovie.c</option>
<option value="listing34.html">/Completed Lab/CreateMovie.h</option>
<option value="listing35.html">/Completed Lab/QTFlatten.c</option>
<option value="listing36.html">/Completed Lab/QTFlatten.h</option>
<option value="listing37.html">/Completed Lab/QTSound.c</option>
<option value="listing38.html">/Completed Lab/QTSound.h</option>
<option value="listing39.html">/Completed Lab/QTVideo.c</option>
<option value="listing40.html">/Completed Lab/QTVideo.h</option>
<option value="listing41.html">/Start Code/CreateMovie.c</option>
<option value="listing42.html">/Start Code/QTFlatten.c</option>
<option value="listing43.html">/Start Code/QTSound.c</option>
<option value="listing44.html">/Start Code/QTVideo.c</option></select>
</p>
</form>
<p><strong><a href="CreateMovie.zip">Download Sample</a></strong> (“CreateMovie.zip”, 1.12M)<BR>
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<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">/*
File: QTVideo.c
Contains: Code to create video tracks for QuickTime CreateMovie sample
Written by: Scott Kuechle
(based heavily on QuickTime sample code in Inside Macintosh: QuickTime)
Copyright: © 1998 by Apple Computer, Inc. All rights reserved
Change History (most recent first)
<1> 6/26/98 srk first file
*/
/************************************************************
* *
* INCLUDE FILES *
* *
*************************************************************/
#include "ConditionalMacros.h"
#if TARGET_OS_WIN32
#include <QTML.h>
#endif
#include <MacTypes.h>
#include <Errors.h>
#include <Fonts.h>
#include <QuickDraw.h>
#include <FixMath.h>
#include <Sound.h>
#include <Movies.h>
#include <ImageCompression.h>
#include <NumberFormatting.h>
#include "CreateMovie.h"
#include "QTVideo.h"
/************************************************************
* *
* FUNCTION PROTOTYPES *
* *
*************************************************************/
static void QTVideo_AddVideoSamplesToMedia (Media theMedia, const Rect *trackFrame);
static void QTVideo_DrawFrame (const Rect *trackFrame, long curSample);
/************************************************************
* *
* CONSTANTS *
* *
*************************************************************/
#define kVideoTimeScale 600
#define kNumVideoFrames 70
#define kPixelDepth 8 /* use 8-bit depth */
#define kNoOffset 0
#define kMgrChoose 0
#define kSyncSample 0
#define kAddOneVideoSample 1
#define kSampleDuration 60 /* frame duration = 1/10 sec */
#define kTrackStart 0
#define kMediaStart 0
/************************************************************
* *
* QTVideo_CreateMyVideoTrack() *
* *
* Creates a video track for a given QuickTime movie *
* *
*************************************************************/
void QTVideo_CreateMyVideoTrack(Movie theMovie)
{
// Step 1.
// Insert "TrackMediaVars.clp" here
OSErr err = noErr;
Rect trackFrame = {0,0,100,320};
// 1. Create the track
// Step 2.
// Insert "NewMovieTrack.clp" here
CheckError( GetMoviesError(), "NewMovieTrack error" );
// 2. Create the media for the track
// Step 3.
// Insert "NewTrackMedia.clp" here
CheckError( GetMoviesError(), "NewTrackMedia error" );
// 3. Establish a media-editing session
// Step 4.
// Insert "BeginMediaEdits.clp" here
CheckError( err, "BeginMediaEdits error" );
// 3a. Add Samples to the media
// Step 5.
// Build AddVideoSampleToMedia function
QTVideo_AddVideoSamplesToMedia (theMedia, &trackFrame);
// 3b. End media-editing session
// Step 6.
// Insert "EndMediaEdits.clp" here
CheckError( err, "EndMediaEdits error" );
// 4. Insert a reference to a media segment into the track
// Step 7.
// Insert "InsertMediaIntoTrack.clp" here
CheckError( err, "InsertMediaIntoTrack error" );
}
/************************************************************
* *
* QTVideo_AddVideoSamplesToMedia() *
* *
* Creates video samples for the media in a track *
* *
*************************************************************/
static void QTVideo_AddVideoSamplesToMedia(Media theMedia, const Rect *trackFrame)
{
GWorldPtr theGWorld = nil;
long maxCompressedSize;
long curSample;
Handle compressedData = nil;
Ptr compressedDataPtr;
// Step 1.
// Insert "ImageDescriptionVar.clp" here
CGrafPtr oldPort;
GDHandle oldGDeviceH;
OSErr err = noErr;
// Create a graphics world
err = NewGWorld (&theGWorld, /* pointer to created gworld */
kPixelDepth, /* pixel depth */
trackFrame, /* bounds */
nil, /* color table */
nil, /* handle to GDevice */
(GWorldFlags)0); /* flags */
CheckError (err, "NewGWorld error");
// Lock the pixels
LockPixels (GetPortPixMap(theGWorld));
// Determine the maximum size the image will be after compression.
// Specify the compression characteristics, along with the image.
// Step 2.
// Insert "GetMaxCompressionSize.clp" here
CheckError (err, "GetMaxCompressionSize error" );
// Create a new handle of the right size for our compressed image data
compressedData = NewHandle(maxCompressedSize);
CheckError( MemError(), "NewHandle error" );
MoveHHi( compressedData );
HLock( compressedData );
compressedDataPtr = *compressedData;
// Create a handle for the Image Description Structure
imageDesc = (ImageDescriptionHandle)NewHandle(4);
CheckError( MemError(), "NewHandle error" );
// Change the current graphics port to the GWorld
GetGWorld(&oldPort, &oldGDeviceH);
SetGWorld(theGWorld, nil);
// For each sample...
for (curSample = 1; curSample <= kNumVideoFrames; curSample++) {
// Call DrawFrame to actually do the drawing of our image
QTVideo_DrawFrame(trackFrame, curSample);
// Use the ICM to compress the image
// Step 3.
// Insert "CompressImage.clp" here
CheckError( err, "CompressImage error" );
// Add sample data and a description to a media
// Step 4.
// Insert "AddMediaSample.clp" here
CheckError( err, "AddMediaSample error" );
} // for loop
SetGWorld (oldPort, oldGDeviceH);
// Dealocate our previously alocated handles and GWorld
if (imageDesc)
{
DisposeHandle ((Handle)imageDesc);
}
if (compressedData)
{
DisposeHandle (compressedData);
}
if (theGWorld)
{
DisposeGWorld (theGWorld);
}
}
/************************************************************
* *
* QTVideo_DrawFrame() *
* *
* contains code to "draw" a video frame *
* *
*************************************************************/
static void QTVideo_DrawFrame(const Rect *trackFrame, long curSample)
{
Str255 numStr;
EraseRect (trackFrame);
ForeColor( redColor );
PaintRect( trackFrame );
ForeColor( blueColor );
NumToString (curSample, numStr);
MoveTo ( (short)(trackFrame->right / 2), (short)(trackFrame->bottom / 2));
TextSize ( (short)(trackFrame->bottom / 3));
DrawString (numStr);
if ( curSample == 70 ) {
ForeColor( greenColor );
MoveTo((short)(trackFrame->left + 12), (short)(trackFrame->bottom / 2 ));
TextSize( (short)(trackFrame->bottom / 4) );
DrawString("\pWhoa cool!");
}
}
</pre>
<!--googleoff: index -->
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<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/CreateMovie/listing44.html%3Fid%3DDTS10001035-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
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