/*
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 *
 */
// $Id: QTAtom_stsc.h,v 1.8 2003/08/15 23:53:14 sbasu Exp $
//
// QTAtom_stsc:
//   The 'stsc' QTAtom class.

#ifndef QTAtom_stsc_H
#define QTAtom_stsc_H


//
// Includes
#include "QTFile.h"
#include "QTAtom.h"


//
// Class state cookie
class QTAtom_stsc_SampleTableControlBlock {

public:
    //
    // Constructor and destructor.
                        QTAtom_stsc_SampleTableControlBlock(void);
    virtual             ~QTAtom_stsc_SampleTableControlBlock(void);
    
    //
    // Reset function
            void        Reset(void);

    //
    // Sample table cache
    UInt32              fCurEntry;
    UInt32              fCurSample;
    UInt32              fLastFirstChunk, fLastSamplesPerChunk, fLastSampleDescription;
    

    UInt32  fLastFirstChunk_GetChunkFirstLastSample; 
    UInt32  fLastSamplesPerChunk_GetChunkFirstLastSample; 
    UInt32  fLastTotalSamples_GetChunkFirstLastSample;
    
    UInt32 fCurEntry_GetChunkFirstLastSample;
    UInt32 chunkNumber_GetChunkFirstLastSample;
    UInt32 firstSample_GetChunkFirstLastSample;
    UInt32 lastSample_GetChunkFirstLastSample;


    UInt32 fFirstSampleNumber_SampleToChunkInfo;
    UInt32 fFirstSamplesPerChunk_SampleToChunkInfo;
    UInt32 fFirstChunkNumber_SampleToChunkInfo;
    UInt32 fFirstSampleDescriptionIndex_SampleToChunkInfo;
    UInt32 fFirstSampleOffsetInChunk_SampleToChunkInfo;
    
    UInt32  fCurEntry_SampleToChunkInfo;
    UInt32  fCurSample_SampleToChunkInfo;
    UInt32  fLastFirstChunk_SampleToChunkInfo; 
    UInt32  fLastSamplesPerChunk_SampleToChunkInfo; 
    UInt32  fLastSampleDescription_SampleToChunkInfo;
    
    UInt32  fGetSampleInfo_SampleNumber;
    UInt32  fGetSampleInfo_Length;
    UInt32  fGetSampleInfo_SampleDescriptionIndex;
    UInt64  fGetSampleInfo_Offset;
    UInt32  fGetSampleInfo_LastChunk;
    UInt32  fGetSampleInfo_LastChunkOffset;
    
    UInt32 fGetSizeOfSamplesInChunk_chunkNumber;
    UInt32 fGetSizeOfSamplesInChunk_firstSample;
    UInt32 fGetSizeOfSamplesInChunk_lastSample;
    UInt32 fGetSizeOfSamplesInChunk_size;
    

};


//
// QTAtom class
class QTAtom_stsc : public QTAtom {

public:
    //
    // Constructors and destructor.
                        QTAtom_stsc(QTFile * File, QTFile::AtomTOCEntry * Atom,
                               Bool16 Debug = false, Bool16 DeepDebug = false);
    virtual             ~QTAtom_stsc(void);


    //
    // Initialization functions.
    virtual Bool16      Initialize(void);
    
    //
    // Accessors.
    
     Bool16             GetChunkFirstLastSample(UInt32 chunkNumber, UInt32 *firstSample, UInt32 *lastSample,  QTAtom_stsc_SampleTableControlBlock *STCB);

     Bool16             SampleToChunkInfo(UInt32 SampleNumber,
                                                  UInt32 *samplesPerChunk = NULL,
                                                  UInt32 *ChunkNumber = NULL,
                                                  UInt32 *SampleDescriptionIndex = NULL,
                                                  UInt32 *SampleOffsetInChunk = NULL,
                                                  QTAtom_stsc_SampleTableControlBlock * STCB = NULL);


    inline  Bool16      SampleNumberToChunkNumber(UInt32 SampleNumber, UInt32 *ChunkNumber = NULL, UInt32 *SampleDescriptionIndex = NULL, UInt32 *SampleOffsetInChunk = NULL,
                                                  QTAtom_stsc_SampleTableControlBlock * STCB = NULL)
                                                 { return SampleToChunkInfo(SampleNumber,NULL /*samplesPerChunk*/, ChunkNumber, SampleDescriptionIndex, SampleOffsetInChunk, STCB); }

    UInt32  GetChunkFirstSample(UInt32 chunkNumber);
    //
    // Debugging functions.
    virtual void        DumpAtom(void);
    virtual void        DumpTable(void);


protected:
    //
    // Protected member variables.
    UInt8       fVersion;
    UInt32      fFlags; // 24 bits in the low 3 bytes

    UInt32      fNumEntries;
    char        *fSampleToChunkTable;

};

#endif // QTAtom_stsc_H
