Add even more of the source
This should be about everything needed to build so far?
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QTFileLib/QTAtom_stsd.cpp
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QTFileLib/QTAtom_stsd.cpp
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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// $Id: QTAtom_stsd.cpp,v 1.1 2006/01/05 13:20:36 murata Exp $
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//
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// QTAtom_stsd:
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// The 'stsd' QTAtom class.
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// -------------------------------------
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// Includes
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include "SafeStdLib.h"
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#include <string.h>
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#ifndef __Win32__
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#include <sys/types.h>
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#include <netinet/in.h>
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#endif
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#include "QTFile.h"
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#include "QTAtom.h"
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#include "QTAtom_stsd.h"
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#include "OSMemory.h"
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// -------------------------------------
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// Constants
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//
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const int stsdPos_VersionFlags = 0;
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const int stsdPos_NumEntries = 4;
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const int stsdPos_SampleTable = 8;
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const int stsdDescPos_Size = 0;
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const int stsdDescPos_DataFormat = 4;
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const int stsdDescPos_Index = 14;
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// -------------------------------------
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// Macros
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//
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#define DEBUG_PRINT(s) if(fDebug) qtss_printf s
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#define DEEP_DEBUG_PRINT(s) if(fDeepDebug) qtss_printf s
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// -------------------------------------
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// Constructors and destructors
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//
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QTAtom_stsd::QTAtom_stsd(QTFile * File, QTFile::AtomTOCEntry * TOCEntry, Bool16 Debug, Bool16 DeepDebug)
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: QTAtom(File, TOCEntry, Debug, DeepDebug),
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fNumEntries(0), fSampleDescriptionTable(NULL), fTable(NULL)
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{
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}
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QTAtom_stsd::~QTAtom_stsd(void)
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{
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//
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// Free our variables.
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if( fSampleDescriptionTable != NULL )
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delete[] fSampleDescriptionTable;
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if( fTable != NULL )
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delete[] fTable;
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}
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// -------------------------------------
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// Initialization functions
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//
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Bool16 QTAtom_stsd::Initialize(void)
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{
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// Temporary vars
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UInt32 tempInt32;
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// General vars
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char *pSampleDescriptionTable;
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//
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// Parse this atom's fields.
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ReadInt32(stsdPos_VersionFlags, &tempInt32);
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fVersion = (UInt8)((tempInt32 >> 24) & 0x000000ff);
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fFlags = tempInt32 & 0x00ffffff;
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ReadInt32(stsdPos_NumEntries, &fNumEntries);
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//
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// Read in all of the sample descriptions.
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if( fNumEntries > 0 ) {
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//
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// Allocate our description tables.
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UInt64 tableSize = fTOCEntry.AtomDataLength - 8;
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Assert(tableSize < kSInt32_Max);
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fSampleDescriptionTable = NEW char[ (SInt32) tableSize];
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if( fSampleDescriptionTable == NULL )
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return false;
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fTable = NEW char *[fNumEntries];
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if( fTable == NULL )
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return false;
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//
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// Read in the sample description table.
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ReadBytes(stsdPos_SampleTable, fSampleDescriptionTable, (UInt32) tableSize);
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//
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// Read them all in..
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pSampleDescriptionTable = fSampleDescriptionTable;
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char *maxSampleDescriptionPtr = pSampleDescriptionTable + tableSize;
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for( UInt32 CurDesc = 0; CurDesc < fNumEntries; CurDesc++ ) {
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//
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// Associate this entry in our Table with the actual location of
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// this sample description.
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fTable[CurDesc] = pSampleDescriptionTable;
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//
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// Skip over this mini-atom.
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memcpy(&tempInt32, pSampleDescriptionTable, 4);
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pSampleDescriptionTable += ntohl(tempInt32);
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if (pSampleDescriptionTable > maxSampleDescriptionPtr)
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{ return false;
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}
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}
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}
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//
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// This atom has been successfully read in.
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return true;
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}
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// -------------------------------------
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// Accessors
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//
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Bool16 QTAtom_stsd::FindSampleDescription(OSType DataFormat, char ** Buffer, UInt32 * Length)
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{
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// Temporary vars
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UInt32 tempInt32;
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//
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// Go through all of the sample descriptions, looking for the requested
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// entry.
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for( UInt32 CurDesc = 0; CurDesc < fNumEntries; CurDesc++ ) {
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//
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// Get this entry's data format.
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memcpy(&tempInt32, fTable[CurDesc] + stsdDescPos_DataFormat, 4);
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tempInt32 = ntohl(tempInt32);
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//
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// Skip this entry if it does not match.
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if( DataFormat != tempInt32 )
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continue;
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//
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// We found a match; return it.
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*Buffer = fTable[CurDesc];
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memcpy(&tempInt32, fTable[CurDesc] + stsdDescPos_Size, 4);
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*Length = ntohl(tempInt32);
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return true;
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}
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//
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// No match was found.
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return false;
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}
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UInt16 QTAtom_stsd::SampleDescriptionToDataReference(UInt32 SampleDescriptionID)
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{
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// Temporary vars
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UInt16 tempInt16;
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//
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// Validate our arguments.
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if( SampleDescriptionID > fNumEntries )
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return 1;
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//
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// Find and return the given sample's data reference index.
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memcpy(&tempInt16, fTable[SampleDescriptionID - 1] + stsdDescPos_Index, 2);
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return ntohs(tempInt16);
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}
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// -------------------------------------
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// Debugging functions
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//
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void QTAtom_stsd::DumpAtom(void)
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{
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DEBUG_PRINT(("QTAtom_stsd::DumpAtom - Dumping atom.\n"));
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DEBUG_PRINT(("QTAtom_stsd::DumpAtom - ..Number of sample description entries: %"_S32BITARG_"\n", fNumEntries));
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}
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