174 lines
5.1 KiB
C++
174 lines
5.1 KiB
C++
/*
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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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//
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// QTAtom_elst:
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// The 'elst' 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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#include "QTFile.h"
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#include "QTAtom.h"
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#include "QTAtom_elst.h"
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#include "OSMemory.h"
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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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// Constants
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//
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const int elstPos_VersionFlags = 0;
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const int elstPos_NumEdits = 4;
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const int elstPos_EditList = 8;
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const int elstEntryPos_Duration = 0;
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const int elstEntryPos_MediaTime = 4;
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const int elstEntryPos_MediaRate = 8;
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const int elstEntryPosV1_Duration = 0;
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const int elstEntryPosV1_MediaTime = 8;
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const int elstEntryPosV1_MediaRate = 16;
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// -------------------------------------
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// Constructors and destructors
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//
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QTAtom_elst::QTAtom_elst(QTFile * File, QTFile::AtomTOCEntry * TOCEntry, Bool16 Debug, Bool16 DeepDebug)
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: QTAtom(File, TOCEntry, Debug, DeepDebug),
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fNumEdits(0), fEdits(NULL),
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fFirstEditMovieTime(0)
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{
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}
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QTAtom_elst::~QTAtom_elst(void)
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{
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//
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// Free our variables.
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if( fEdits != NULL )
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delete[] fEdits;
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}
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// -------------------------------------
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// Initialization functions
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//
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Bool16 QTAtom_elst::Initialize(void)
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{
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// Temporary vars
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UInt32 tempInt32;
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//
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// Parse this atom's fields.
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ReadInt32(elstPos_VersionFlags, &tempInt32);
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fVersion = (UInt8)((tempInt32 >> 24) & 0x000000ff);
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fFlags = tempInt32 & 0x00ffffff;
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if (fVersion > 1)
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{
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DEEP_DEBUG_PRINT(("QTAtom_elst::Initialize failed. Version unsupported: %d\n",fVersion));
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return false;
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}
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ReadInt32(elstPos_NumEdits, &fNumEdits);
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//
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// Read in all of the edits.
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if( fNumEdits > 0 ) {
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DEEP_DEBUG_PRINT(("QTAtom_elst::Initialize ..%"_U32BITARG_" edits found.\n", fNumEdits));
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//
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// Allocate our ref table.
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fEdits = NEW EditListEntry[fNumEdits];
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if( fEdits == NULL )
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return false;
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//
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// Read them all in..
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for( UInt32 CurEdit = 0; CurEdit < fNumEdits; CurEdit++ )
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{
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if (0 == fVersion)
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{
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//
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// Get all of the data in this edit list entry.
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ReadInt32To64(elstPos_EditList + (CurEdit * 12) + elstEntryPos_Duration, &fEdits[CurEdit].EditDuration);
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ReadInt32To64Signed(elstPos_EditList + (CurEdit * 12) + elstEntryPos_MediaTime, &fEdits[CurEdit].StartingMediaTime);
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ReadInt32(elstPos_EditList + (CurEdit * 12) + elstEntryPos_MediaRate, &fEdits[CurEdit].EditMediaRate);
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}
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else if (1 == fVersion)
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{
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// Get all of the data in this edit list entry.
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ReadInt64(elstPos_EditList + (CurEdit * 20) + elstEntryPosV1_Duration, &fEdits[CurEdit].EditDuration);
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ReadInt64(elstPos_EditList + (CurEdit * 20) + elstEntryPosV1_MediaTime, (UInt64*) &fEdits[CurEdit].StartingMediaTime );
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ReadInt32(elstPos_EditList + (CurEdit * 20) + elstEntryPosV1_MediaRate, &fEdits[CurEdit].EditMediaRate);
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}
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DEEP_DEBUG_PRINT(("QTAtom_elst::Initialize ..Edit #%"_U32BITARG_": Duration=%"_64BITARG_"u; MediaTime=%"_64BITARG_"d\n", CurEdit, fEdits[CurEdit].EditDuration, fEdits[CurEdit].StartingMediaTime));
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//
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// Adjust our starting media time.
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if( fEdits[CurEdit].StartingMediaTime == -1 )
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fFirstEditMovieTime = fEdits[CurEdit].EditDuration;
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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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// Debugging functions
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//
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void QTAtom_elst::DumpAtom(void)
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{
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DEBUG_PRINT(("QTAtom_elst::DumpAtom - Dumping atom.\n"));
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DEBUG_PRINT(("QTAtom_elst::DumpAtom - ..Version: %d.\n", (int) fVersion));
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DEBUG_PRINT(("QTAtom_elst::DumpAtom - ..Number of edits: %"_S32BITARG_"\n", fNumEdits));
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}
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