161 lines
4.9 KiB
C++
161 lines
4.9 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_mdhd:
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// The 'mdhd' 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 <time.h>
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#include "SafeStdLib.h"
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#include "QTFile.h"
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#include "QTAtom.h"
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#include "QTAtom_mdhd.h"
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// -------------------------------------
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// Constants
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//
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const int mdhdPos_VersionFlags = 0;
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const int mdhdPos_CreationTime = 4;
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const int mdhdPos_ModificationTime = 8;
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const int mdhdPos_TimeScale = 12;
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const int mdhdPos_Duration = 16;
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const int mdhdPos_Language = 20;
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const int mdhdPos_Quality = 22;
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const int mdhdPosV1_CreationTime = 4;
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const int mdhdPosV1_ModificationTime = 12;
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const int mdhdPosV1_TimeScale = 20;
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const int mdhdPosV1_Duration = 24;
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const int mdhdPosV1_Language = 20 + 12;
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const int mdhdPosV1_Quality = 22 + 12;
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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_mdhd::QTAtom_mdhd(QTFile * File, QTFile::AtomTOCEntry * TOCEntry, Bool16 Debug, Bool16 DeepDebug)
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: QTAtom(File, TOCEntry, Debug, DeepDebug)
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{
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}
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QTAtom_mdhd::~QTAtom_mdhd(void)
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{
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}
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// -------------------------------------
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// Initialization functions
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//
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Bool16 QTAtom_mdhd::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(mdhdPos_VersionFlags, &tempInt32);
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fVersion = (UInt8)((tempInt32 >> 24) & 0x000000ff);
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fFlags = tempInt32 & 0x00ffffff;
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if (0 == fVersion)
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{
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// Verify that this atom is the correct length.
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if( fTOCEntry.AtomDataLength != 24 )
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{
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DEEP_DEBUG_PRINT(("QTAtom_mdhd::Initialize failed. Expected AtomDataLength == 24 version: %d AtomDataLength: %"_64BITARG_"u\n",fVersion, fTOCEntry.AtomDataLength));
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return false;
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}
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ReadInt32To64(mdhdPos_CreationTime, &fCreationTime);
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ReadInt32To64(mdhdPos_ModificationTime, &fModificationTime);
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ReadInt32(mdhdPos_TimeScale, &fTimeScale);
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ReadInt32To64(mdhdPos_Duration, &fDuration);
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ReadInt16(mdhdPos_Language, &fLanguage);
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ReadInt16(mdhdPos_Quality, &fQuality);
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}
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else if (1 == fVersion)
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{
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// Verify that this atom is the correct length.
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if( fTOCEntry.AtomDataLength != 36 )
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{
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DEEP_DEBUG_PRINT(("QTAtom_mdhd::Initialize failed. Expected AtomDataLength == 36 version: %d AtomDataLength: %"_64BITARG_"u\n",fVersion, fTOCEntry.AtomDataLength));
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return false;
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}
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ReadInt64(mdhdPosV1_CreationTime, &fCreationTime);
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ReadInt64(mdhdPosV1_ModificationTime, &fModificationTime);
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ReadInt32(mdhdPosV1_TimeScale, &fTimeScale);
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ReadInt64(mdhdPosV1_Duration, &fDuration);
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ReadInt16(mdhdPosV1_Language, &fLanguage);
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ReadInt16(mdhdPosV1_Quality, &fQuality);
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}
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else
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{
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DEEP_DEBUG_PRINT(("QTAtom_mdhd::Initialize failed. Version unsupported: %d\n",fVersion));
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return false;
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}
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//
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// Compute the reciprocal of the timescale.
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fTimeScaleRecip = 1 / (Float64)fTimeScale;
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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_mdhd::DumpAtom(void)
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{
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// Temporary vars
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time_t unixCreationTime = (time_t)fCreationTime + (time_t)QT_TIME_TO_LOCAL_TIME;
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char buffer[kTimeStrSize];
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struct tm timeResult;
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DEBUG_PRINT(("QTAtom_mdhd::DumpAtom - Dumping atom.\n"));
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DEBUG_PRINT(("QTAtom_mdhd::DumpAtom - ..Version: %d.\n", (int) fVersion));
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DEBUG_PRINT(("QTAtom_mdhd::DumpAtom - ..Creation date: %s", qtss_asctime(qtss_gmtime(&unixCreationTime, &timeResult),buffer,sizeof(buffer))));
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}
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