582 lines
16 KiB
C++
582 lines
16 KiB
C++
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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_stts.cpp,v 1.2 2006/03/29 00:47:00 murata Exp $
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//
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// QTAtom_stts:
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// The 'stts' 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_stts.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 sttsPos_VersionFlags = 0;
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const int sttsPos_NumEntries = 4;
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const int sttsPos_SampleTable = 8;
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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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// Class state cookie
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//
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QTAtom_stts_SampleTableControlBlock::QTAtom_stts_SampleTableControlBlock(void)
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{
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Reset();
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}
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QTAtom_stts_SampleTableControlBlock::~QTAtom_stts_SampleTableControlBlock(void)
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{
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}
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void QTAtom_stts_SampleTableControlBlock::Reset(void)
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{
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fMTtSN_CurEntry = 0;
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fMTtSN_CurMediaTime = 0;
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fMTtSN_CurSample = 1;
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fSNtMT_CurEntry = 0;
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fSNtMT_CurMediaTime = 0;
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fSNtMT_CurSample = 1;
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fGetSampleMediaTime_SampleNumber = 0;
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fGetSampleMediaTime_MediaTime = 0;
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}
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// -------------------------------------
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// Constructors and destructors
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//
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QTAtom_stts::QTAtom_stts(QTFile * File, QTFile::AtomTOCEntry * TOCEntry, Bool16 Debug, Bool16 DeepDebug)
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: QTAtom(File, TOCEntry, Debug, DeepDebug),
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fNumEntries(0), fTimeToSampleTable(NULL), fTableSize(0)
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{
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}
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QTAtom_stts::~QTAtom_stts(void)
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{
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//
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// Free our variables.
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#if MMAP_TABLES
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if( fTimeToSampleTable != NULL )
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this->UnMap(fTimeToSampleTable, fTableSize);
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#else
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if( fTimeToSampleTable != NULL )
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delete[] fTimeToSampleTable;
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#endif
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}
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// -------------------------------------
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// Initialization functions
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//
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Bool16 QTAtom_stts::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(sttsPos_VersionFlags, &tempInt32);
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fVersion = (UInt8)((tempInt32 >> 24) & 0x000000ff);
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fFlags = tempInt32 & 0x00ffffff;
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ReadInt32(sttsPos_NumEntries, &fNumEntries);
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//
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// Validate the size of the sample table.
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if( (UInt32)(fNumEntries * 8) != (fTOCEntry.AtomDataLength - 8) )
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return false;
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//
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// Read in the time-to-sample table.
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#if MMAP_TABLES
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fTableSize = (fNumEntries * 8);
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fTimeToSampleTable = this->MemMap(sttsPos_SampleTable, fTableSize);
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if( fTimeToSampleTable == NULL )
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return false;
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#else
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fTimeToSampleTable = NEW char[fNumEntries * 8];
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if( fTimeToSampleTable == NULL )
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return false;
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ReadBytes(sttsPos_SampleTable, fTimeToSampleTable, fNumEntries * 8);
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#endif
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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_stts::MediaTimeToSampleNumber(UInt32 MediaTime, UInt32 * SampleNumber, QTAtom_stts_SampleTableControlBlock * STCB)
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{
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// General vars
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UInt32 SampleCount, SampleDuration;
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QTAtom_stts_SampleTableControlBlock *tempSTCB = NULL;
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Bool16 result = false;
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//
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// Use the default STCB if one was not passed in to us.
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if( STCB == NULL )
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{
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// qtss_printf("QTAtom_stts::MediaTimeToSampleNumber ( STCB == NULL ) \n");
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tempSTCB = NEW QTAtom_stts_SampleTableControlBlock;
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STCB = tempSTCB;
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}
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//
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// Reconfigure the STCB if necessary.
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if( MediaTime < STCB->fMTtSN_CurMediaTime )
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{
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// qtss_printf(" QTAtom_stts::MediaTimeToSampleNumber RESET \n");
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STCB->Reset();
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}
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//
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// Linearly search through the sample table until we find the sample
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// which fits inside the given media time.
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for( ; STCB->fMTtSN_CurEntry < fNumEntries; STCB->fMTtSN_CurEntry++ ) {
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//
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// Copy this sample count and duration.
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memcpy(&SampleCount, fTimeToSampleTable + (STCB->fMTtSN_CurEntry * 8), 4);
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SampleCount = ntohl(SampleCount);
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memcpy(&SampleDuration, fTimeToSampleTable + (STCB->fMTtSN_CurEntry * 8) + 4, 4);
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SampleDuration = ntohl(SampleDuration);
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//
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// Can we skip over this entry?
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if( STCB->fMTtSN_CurMediaTime + (SampleCount * SampleDuration) < MediaTime ) {
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STCB->fMTtSN_CurMediaTime += SampleCount * SampleDuration;
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STCB->fMTtSN_CurSample += SampleCount;
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continue;
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}
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//
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// Locate and return the sample which is/begins right before the
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// given media time.
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if( SampleNumber != NULL )
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{
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*SampleNumber = STCB->fMTtSN_CurSample;
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if (SampleDuration > 0)
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*SampleNumber += (MediaTime - STCB->fMTtSN_CurMediaTime) / SampleDuration;
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result = true;
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break;
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}
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}
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delete tempSTCB;
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return result;
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}
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Bool16 QTAtom_stts::SampleNumberToMediaTime(UInt32 SampleNumber, UInt32 * MediaTime, QTAtom_stts_SampleTableControlBlock * STCB)
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{
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// General vars
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UInt32 SampleCount, SampleDuration;
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//
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// Use the default STCB if one was not passed in to us.
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Assert(STCB != NULL);
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if ( STCB->fGetSampleMediaTime_SampleNumber == SampleNumber)
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{
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// qtss_printf("QTTrack::GetSampleMediaTime cache hit SampleNumber %"_S32BITARG_" \n", SampleNumber);
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*MediaTime = STCB->fGetSampleMediaTime_MediaTime;
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return true;
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}
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//
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// Reconfigure the STCB if necessary.
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if( SampleNumber < STCB->fSNtMT_CurSample )
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{
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// qtss_printf(" QTAtom_stts::SampleNumberToMediaTime reset \n");
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STCB->Reset();
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}
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//
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// Linearly search through the sample table until we find the sample
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// which fits inside the given media time.
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for( ; STCB->fSNtMT_CurEntry < fNumEntries; STCB->fSNtMT_CurEntry++ ) {
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//
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// Copy this sample count and duration.
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memcpy(&SampleCount, fTimeToSampleTable + (STCB->fSNtMT_CurEntry * 8), 4);
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SampleCount = ntohl(SampleCount);
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memcpy(&SampleDuration, fTimeToSampleTable + (STCB->fSNtMT_CurEntry * 8) + 4, 4);
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SampleDuration = ntohl(SampleDuration);
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//
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// Can we skip over this entry?
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if( STCB->fSNtMT_CurSample + SampleCount < SampleNumber ) {
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STCB->fSNtMT_CurMediaTime += SampleCount * SampleDuration;
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STCB->fSNtMT_CurSample += SampleCount;
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continue;
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}
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//
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// Return the sample time at the beginning of this sample.
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if( MediaTime != NULL )
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*MediaTime = STCB->fSNtMT_CurMediaTime + ((SampleNumber - STCB->fSNtMT_CurSample) * SampleDuration);
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STCB->fGetSampleMediaTime_SampleNumber = SampleNumber;
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STCB->fGetSampleMediaTime_MediaTime = *MediaTime;
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return true;
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}
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//
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// No match; return false.
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return false;
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}
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// -------------------------------------
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// Debugging functions
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//
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void QTAtom_stts::DumpAtom(void)
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{
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DEBUG_PRINT(("QTAtom_stts::DumpAtom - Dumping atom.\n"));
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DEBUG_PRINT(("QTAtom_stts::DumpAtom - ..Number of TTS entries: %"_S32BITARG_"\n", fNumEntries));
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}
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void QTAtom_stts::DumpTable(void)
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{
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//
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// Print out a header.
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qtss_printf("-- Time To Sample table -----------------------------------------------------------\n");
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qtss_printf("\n");
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qtss_printf(" Entry Num. Sample Count Sample Duration\n");
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qtss_printf(" ---------- ------------ ---------------\n");
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//
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// Print the table.
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UInt32 SampleCount = 0;
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UInt32 SampleDuration = 0;
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for( UInt32 CurEntry = 0; CurEntry < fNumEntries; CurEntry++ )
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{
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//
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// Copy this sample count and duration.
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memcpy(&SampleCount, fTimeToSampleTable + (CurEntry * 8), 4);
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SampleCount = ntohl(SampleCount);
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memcpy(&SampleDuration, fTimeToSampleTable + (CurEntry* 8) + 4, 4);
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SampleDuration = ntohl(SampleDuration);
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// Print out a listing.
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qtss_printf(" %10"_U32BITARG_" : %10"_U32BITARG_" %10"_U32BITARG_"\n", CurEntry, SampleCount, SampleDuration);
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}
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}
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// -------------------------------------
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// Constants
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//
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const int cttsPos_VersionFlags = 0;
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const int cttsPos_NumEntries = 4;
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const int cttsPos_SampleTable = 8;
|
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|
||
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|
||
|
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// -------------------------------------
|
||
|
|
// Macros
|
||
|
|
//
|
||
|
|
#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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// -------------------------------------
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// Class state cookie
|
||
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//
|
||
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QTAtom_ctts_SampleTableControlBlock::QTAtom_ctts_SampleTableControlBlock(void)
|
||
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{
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Reset();
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}
|
||
|
|
|
||
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QTAtom_ctts_SampleTableControlBlock::~QTAtom_ctts_SampleTableControlBlock(void)
|
||
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{
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}
|
||
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void QTAtom_ctts_SampleTableControlBlock::Reset(void)
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||
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{
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fMTtSN_CurEntry = 0;
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fMTtSN_CurMediaTime = 0;
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fMTtSN_CurSample = 1;
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fSNtMT_CurEntry = 0;
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fSNtMT_CurMediaTime = 0;
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fSNtMT_CurSample = 1;
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fGetSampleMediaTime_SampleNumber = 0;
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fGetSampleMediaTime_MediaTime = 0;
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}
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||
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|
||
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// -------------------------------------
|
||
|
|
// Constructors and destructors
|
||
|
|
//
|
||
|
|
QTAtom_ctts::QTAtom_ctts(QTFile * File, QTFile::AtomTOCEntry * TOCEntry, Bool16 Debug, Bool16 DeepDebug)
|
||
|
|
: QTAtom(File, TOCEntry, Debug, DeepDebug),
|
||
|
|
fNumEntries(0), fTimeToSampleTable(NULL)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
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QTAtom_ctts::~QTAtom_ctts(void)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Free our variables.
|
||
|
|
if( fTimeToSampleTable != NULL )
|
||
|
|
delete[] fTimeToSampleTable;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// -------------------------------------
|
||
|
|
// Initialization functions
|
||
|
|
//
|
||
|
|
Bool16 QTAtom_ctts::Initialize(void)
|
||
|
|
{
|
||
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|
// Temporary vars
|
||
|
|
UInt32 tempInt32;
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Parse this atom's fields.
|
||
|
|
ReadInt32(cttsPos_VersionFlags, &tempInt32);
|
||
|
|
fVersion = (UInt8)((tempInt32 >> 24) & 0x000000ff);
|
||
|
|
fFlags = tempInt32 & 0x00ffffff;
|
||
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|
||
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|
ReadInt32(cttsPos_NumEntries, &fNumEntries);
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||
|
|
|
||
|
|
//
|
||
|
|
// Validate the size of the sample table.
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||
|
|
if( (UInt32)(fNumEntries * 8) != (fTOCEntry.AtomDataLength - 8) )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Read in the time-to-sample table.
|
||
|
|
fTimeToSampleTable = NEW char[fNumEntries * 8];
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||
|
|
if( fTimeToSampleTable == NULL )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
ReadBytes(cttsPos_SampleTable, fTimeToSampleTable, fNumEntries * 8);
|
||
|
|
|
||
|
|
//
|
||
|
|
// This atom has been successfully read in.
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// -------------------------------------
|
||
|
|
// Accessors
|
||
|
|
//
|
||
|
|
Bool16 QTAtom_ctts::MediaTimeToSampleNumber(UInt32 MediaTime, UInt32 * SampleNumber, QTAtom_ctts_SampleTableControlBlock * STCB)
|
||
|
|
{
|
||
|
|
// General vars
|
||
|
|
UInt32 SampleCount, SampleDuration;
|
||
|
|
QTAtom_ctts_SampleTableControlBlock *tempSTCB = NULL;
|
||
|
|
Bool16 result = false;
|
||
|
|
//
|
||
|
|
// Use the default STCB if one was not passed in to us.
|
||
|
|
if( STCB == NULL )
|
||
|
|
{
|
||
|
|
// qtss_printf("QTAtom_ctts::MediaTimeToSampleNumber ( STCB == NULL ) \n");
|
||
|
|
tempSTCB = NEW QTAtom_ctts_SampleTableControlBlock;
|
||
|
|
STCB = tempSTCB;
|
||
|
|
}
|
||
|
|
//
|
||
|
|
// Reconfigure the STCB if necessary.
|
||
|
|
if( MediaTime < STCB->fMTtSN_CurMediaTime )
|
||
|
|
{
|
||
|
|
// qtss_printf(" QTAtom_ctts::MediaTimeToSampleNumber RESET \n");
|
||
|
|
STCB->Reset();
|
||
|
|
}
|
||
|
|
//
|
||
|
|
// Linearly search through the sample table until we find the sample
|
||
|
|
// which fits inside the given media time.
|
||
|
|
for( ; STCB->fMTtSN_CurEntry < fNumEntries; STCB->fMTtSN_CurEntry++ ) {
|
||
|
|
//
|
||
|
|
// Copy this sample count and duration.
|
||
|
|
memcpy(&SampleCount, fTimeToSampleTable + (STCB->fMTtSN_CurEntry * 8), 4);
|
||
|
|
SampleCount = ntohl(SampleCount);
|
||
|
|
memcpy(&SampleDuration, fTimeToSampleTable + (STCB->fMTtSN_CurEntry * 8) + 4, 4);
|
||
|
|
SampleDuration = ntohl(SampleDuration);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Can we skip over this entry?
|
||
|
|
if( STCB->fMTtSN_CurMediaTime + (SampleCount * SampleDuration) < MediaTime ) {
|
||
|
|
STCB->fMTtSN_CurMediaTime += SampleCount * SampleDuration;
|
||
|
|
STCB->fMTtSN_CurSample += SampleCount;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Locate and return the sample which is/begins right before the
|
||
|
|
// given media time.
|
||
|
|
if( SampleNumber != NULL )
|
||
|
|
{
|
||
|
|
*SampleNumber = STCB->fMTtSN_CurSample;
|
||
|
|
if (SampleDuration > 0)
|
||
|
|
*SampleNumber += (MediaTime - STCB->fMTtSN_CurMediaTime) / SampleDuration;
|
||
|
|
result = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
delete tempSTCB;
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
Bool16 QTAtom_ctts::SampleNumberToMediaTimeOffset(UInt32 SampleNumber, UInt32 * MediaTimeOffset, QTAtom_ctts_SampleTableControlBlock * STCB)
|
||
|
|
{
|
||
|
|
// General vars
|
||
|
|
UInt32 SampleCount, SampleOffset;
|
||
|
|
//
|
||
|
|
// Use the default STCB if one was not passed in to us.
|
||
|
|
Assert(STCB != NULL);
|
||
|
|
|
||
|
|
if ( STCB->fGetSampleMediaTime_SampleNumber == SampleNumber)
|
||
|
|
{
|
||
|
|
// qtss_printf("QTTrack::GetSampleMediaTime cache hit SampleNumber %"_S32BITARG_" \n", SampleNumber);
|
||
|
|
*MediaTimeOffset = STCB->fGetSampleMediaTime_MediaTime;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//
|
||
|
|
// Reconfigure the STCB if necessary.
|
||
|
|
if( SampleNumber < STCB->fSNtMT_CurSample )
|
||
|
|
{
|
||
|
|
// qtss_printf(" QTAtom_ctts::SampleNumberToMediaTime reset \n");
|
||
|
|
STCB->Reset();
|
||
|
|
}
|
||
|
|
//
|
||
|
|
// Linearly search through the sample table until we find the sample
|
||
|
|
// which fits inside the given media time.
|
||
|
|
for( ; STCB->fSNtMT_CurEntry < fNumEntries; STCB->fSNtMT_CurEntry++ ) {
|
||
|
|
//
|
||
|
|
// Copy this sample count and duration.
|
||
|
|
memcpy(&SampleCount, fTimeToSampleTable + (STCB->fSNtMT_CurEntry * 8), 4);
|
||
|
|
SampleCount = ntohl(SampleCount);
|
||
|
|
memcpy(&SampleOffset, fTimeToSampleTable + (STCB->fSNtMT_CurEntry * 8) + 4, 4);
|
||
|
|
SampleOffset = ntohl(SampleOffset);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Can we skip over this entry?
|
||
|
|
if( STCB->fSNtMT_CurSample + SampleCount < SampleNumber ) {
|
||
|
|
STCB->fSNtMT_CurMediaTime += SampleCount * SampleOffset;
|
||
|
|
STCB->fSNtMT_CurSample += SampleCount;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Return the sample time at the beginning of this sample.
|
||
|
|
if( MediaTimeOffset != NULL )
|
||
|
|
*MediaTimeOffset = SampleOffset;
|
||
|
|
|
||
|
|
STCB->fGetSampleMediaTime_SampleNumber = SampleNumber;
|
||
|
|
STCB->fGetSampleMediaTime_MediaTime = *MediaTimeOffset;
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// No match; return false.
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
// -------------------------------------
|
||
|
|
// Debugging functions
|
||
|
|
//
|
||
|
|
void QTAtom_ctts::DumpAtom(void)
|
||
|
|
{
|
||
|
|
DEBUG_PRINT(("QTAtom_ctts::DumpAtom - Dumping atom.\n"));
|
||
|
|
DEBUG_PRINT(("QTAtom_ctts::DumpAtom - ..Number of CTTS entries: %"_S32BITARG_"\n", fNumEntries));
|
||
|
|
}
|
||
|
|
|
||
|
|
void QTAtom_ctts::DumpTable(void)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Print out a header.
|
||
|
|
qtss_printf("-- Composition Time To Sample table ----------------------------------------------\n");
|
||
|
|
qtss_printf("\n");
|
||
|
|
qtss_printf(" Entry Num. Sample Count Sample Offset\n");
|
||
|
|
qtss_printf(" ---------- ------------ ---------------\n");
|
||
|
|
|
||
|
|
//
|
||
|
|
// Print the table.
|
||
|
|
UInt32 SampleCount = 0;
|
||
|
|
UInt32 SampleOffset = 0;
|
||
|
|
for( UInt32 CurEntry = 0; CurEntry < fNumEntries; CurEntry++ )
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Copy this sample count and duration.
|
||
|
|
memcpy(&SampleCount, fTimeToSampleTable + (CurEntry * 8), 4);
|
||
|
|
SampleCount = ntohl(SampleCount);
|
||
|
|
memcpy(&SampleOffset, fTimeToSampleTable + (CurEntry* 8) + 4, 4);
|
||
|
|
SampleOffset = ntohl(SampleOffset);
|
||
|
|
|
||
|
|
// Print out a listing.
|
||
|
|
qtss_printf(" %10"_U32BITARG_" : %10"_U32BITARG_" %10"_U32BITARG_"\n", CurEntry, SampleCount, SampleOffset);
|
||
|
|
}
|
||
|
|
}
|