imf bugs

[asdcplib.git] / src / AS_DCP.h

/*
Copyright (c) 2003-2014, John Hurst
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
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   documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
   derived from this software without specific prior written permission.

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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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*/
/*! \file    AS_DCP.h
    \version $Id$
    \brief   AS-DCP library, public interface

The asdcplib library is a set of file access objects that offer simplified
access to files conforming to the standards published by the SMPTE
D-Cinema Technology Committee 21DC. The file format, labeled AS-DCP,
is described in a series of documents which includes but may not
be be limited to:

 o SMPTE ST 429-2:2011 DCP Operational Constraints
 o SMPTE ST 429-3:2006 Sound and Picture Track File
 o SMPTE ST 429-4:2006 MXF JPEG 2000 Application
 o SMPTE ST 429-5:2009 Timed Text Track File
 o SMPTE ST 429-6:2006 MXF Track File Essence Encryption
 o SMPTE ST 429-10:2008 Stereoscopic Picture Track File
 o SMPTE ST 429-14:2008 Aux Data Track File
 o SMPTE ST 330:2004 - UMID
 o SMPTE ST 336:2001 - KLV
 o SMPTE ST 377:2004 - MXF (old version, required)
 o SMPTE ST 377-1:2011 - MXF
 o SMPTE ST 377-4:2012 - MXF Multichannel Audio Labeling Framework
 o SMPTE ST 390:2011 - MXF OP-Atom
 o SMPTE ST 379-1:2009 - MXF Generic Container (GC)
 o SMPTE ST 381-1:2005 - MPEG2 picture in GC
 o SMPTE ST 422:2006 - JPEG 2000 picture in GC
 o SMPTE ST 382:2007 - WAV/PCM sound in GC
 o IETF RFC 2104 - HMAC/SHA1
 o NIST FIPS 197 - AES (Rijndael) (via OpenSSL)

 o MXF Interop Track File Specification
 o MXF Interop Track File Essence Encryption Specification
 o MXF Interop Operational Constraints Specification
 - Note: the MXF Interop documents are not formally published.
   Contact the asdcplib support address to get copies.

The following use cases are supported by the library:

 o Write essence to a plaintext or ciphertext AS-DCP file:
 o Read essence from a plaintext or ciphertext AS-DCP file:
     MPEG2 Video Elementary Stream
     JPEG 2000 codestreams
     JPEG 2000 stereoscopic codestream pairs
     PCM audio streams
     SMPTE 429-7 Timed Text XML with font and image resources
     Aux Data (frame-wrapped synchronous blob)
     Proposed Dolby (TM) Atmos track file

 o Read header metadata from an AS-DCP file

This project depends upon the following libraries:
 - OpenSSL http://www.openssl.org/
 - Expat http://expat.sourceforge.net/  or
     Xerces-C http://xerces.apache.org/xerces-c/
   An XML library is not needed if you don't need support for SMPTE ST 429-5:2009.
*/

#ifndef _AS_DCP_H_
#define _AS_DCP_H_

#include <KM_error.h>
#include <KM_fileio.h>
#include <stdio.h>
#include <stdarg.h>
#include <math.h>
#include <iosfwd>
#include <string>
#include <cstring>
#include <list>

//--------------------------------------------------------------------------------
// common integer types
// supply your own by defining ASDCP_NO_BASE_TYPES

#ifndef ASDCP_NO_BASE_TYPES
typedef unsigned char  byte_t;
typedef char           i8_t;
typedef unsigned char  ui8_t;
typedef short          i16_t;
typedef unsigned short ui16_t;
typedef int            i32_t;
typedef unsigned int   ui32_t;
#endif


//--------------------------------------------------------------------------------
// convenience macros

// Convenience macros for managing return values in predicates
#define ASDCP_SUCCESS(v) (((v) < 0) ? 0 : 1)
#define ASDCP_FAILURE(v) (((v) < 0) ? 1 : 0)


// Returns RESULT_PTR if the given argument is NULL.
// See Result_t below for an explanation of RESULT_* symbols.
#define ASDCP_TEST_NULL(p) \
  if ( (p) == 0  ) { \
    return ASDCP::RESULT_PTR; \
  }

// Returns RESULT_PTR if the given argument is NULL. See Result_t
// below for an explanation of RESULT_* symbols. It then assumes
// that the argument is a pointer to a string and returns
// RESULT_NULL_STR if the first character is '\0'.
//
#define ASDCP_TEST_NULL_STR(p) \
  ASDCP_TEST_NULL(p); \
  if ( (p)[0] == '\0' ) { \
    return ASDCP::RESULT_NULL_STR; \
  }

// Produces copy constructor boilerplate. Allows convenient private
// declatarion of copy constructors to prevent the compiler from
// silently manufacturing default methods.
#define ASDCP_NO_COPY_CONSTRUCT(T)   \
          T(const T&); \
          T& operator=(const T&)

//--------------------------------------------------------------------------------
// All library components are defined in the namespace ASDCP
//
namespace ASDCP {
  //
  // The version number declaration and explanation have moved to ../configure.ac
  const char* Version();

  // UUIDs are passed around as strings of UUIDlen bytes
  const ui32_t UUIDlen = 16;

  // Encryption keys are passed around as strings of KeyLen bytes
  const ui32_t KeyLen = 16;

  //---------------------------------------------------------------------------------
  // return values

  using Kumu::Result_t;

  using Kumu::RESULT_FALSE;
  using Kumu::RESULT_OK;
  using Kumu::RESULT_FAIL;
  using Kumu::RESULT_PTR;
  using Kumu::RESULT_NULL_STR;
  using Kumu::RESULT_ALLOC;
  using Kumu::RESULT_PARAM;
  using Kumu::RESULT_SMALLBUF;
  using Kumu::RESULT_INIT;
  using Kumu::RESULT_NOT_FOUND;
  using Kumu::RESULT_NO_PERM;
  using Kumu::RESULT_FILEOPEN;
  using Kumu::RESULT_BADSEEK;
  using Kumu::RESULT_READFAIL;
  using Kumu::RESULT_WRITEFAIL;
  using Kumu::RESULT_STATE;
  using Kumu::RESULT_ENDOFFILE;
  using Kumu::RESULT_CONFIG;

  KM_DECLARE_RESULT(FORMAT,     -101, "The file format is not proper OP-Atom/AS-DCP.");
  KM_DECLARE_RESULT(RAW_ESS,    -102, "Unknown raw essence file type.");
  KM_DECLARE_RESULT(RAW_FORMAT, -103, "Raw essence format invalid.");
  KM_DECLARE_RESULT(RANGE,      -104, "Frame number out of range.");
  KM_DECLARE_RESULT(CRYPT_CTX,  -105, "AESEncContext required when writing to encrypted file.");
  KM_DECLARE_RESULT(LARGE_PTO,  -106, "Plaintext offset exceeds frame buffer size.");
  KM_DECLARE_RESULT(CAPEXTMEM,  -107, "Cannot resize externally allocated memory.");
  KM_DECLARE_RESULT(CHECKFAIL,  -108, "The check value did not decrypt correctly.");
  KM_DECLARE_RESULT(HMACFAIL,   -109, "HMAC authentication failure.");
  KM_DECLARE_RESULT(HMAC_CTX,   -110, "HMAC context required.");
  KM_DECLARE_RESULT(CRYPT_INIT, -111, "Error initializing block cipher context.");
  KM_DECLARE_RESULT(EMPTY_FB,   -112, "Empty frame buffer.");
  KM_DECLARE_RESULT(KLV_CODING, -113, "KLV coding error.");
  KM_DECLARE_RESULT(SPHASE,     -114, "Stereoscopic phase mismatch.");
  KM_DECLARE_RESULT(SFORMAT,    -115, "Rate mismatch, file may contain stereoscopic essence.");

  //---------------------------------------------------------------------------------
  // file identification

  // The file accessors in this library implement a bounded set of essence types.
  // This list will be expanded when support for new types is added to the library.
  enum EssenceType_t {
    ESS_UNKNOWN,              // the file is not a supported AS-DCP of AS-02 essence container

    // 
    ESS_MPEG2_VES,            // the file contains an MPEG-2 video elementary stream

    // d-cinema essence types
    ESS_JPEG_2000,            // the file contains one or more JPEG 2000 codestreams
    ESS_PCM_24b_48k,          // the file contains one or more PCM audio pairs
    ESS_PCM_24b_96k,          // the file contains one or more PCM audio pairs
    ESS_TIMED_TEXT,           // the file contains an XML timed text document and one or more resources
    ESS_JPEG_2000_S,          // the file contains one or more JPEG 2000 codestream pairs (stereoscopic)
    ESS_DCDATA_UNKNOWN,       // the file contains one or more D-Cinema Data bytestreams
    ESS_DCDATA_DOLBY_ATMOS,   // the file contains one or more DolbyATMOS bytestreams

    // IMF essence types
    ESS_AS02_JPEG_2000,       // the file contains one or more JPEG 2000 codestreams
    ESS_AS02_PCM_24b_48k,     // the file contains one or more PCM audio pairs, clip wrapped
    ESS_AS02_PCM_24b_96k,     // the file contains one or more PCM audio pairs, clip wrapped
    ESS_AS02_TIMED_TEXT,      // the file contains a TTML document and zero or more resources

    ESS_MAX
  };

  // Determine the type of essence contained in the given MXF file. RESULT_OK
  // is returned if the file is successfully opened and contains a valid MXF
  // stream. If there is an error, the result code will indicate the reason.
  Result_t EssenceType(const std::string& filename, EssenceType_t& type);

  // Determine the type of essence contained in the given raw file. RESULT_OK
  // is returned if the file is successfully opened and contains a known
  // stream type. If there is an error, the result code will indicate the reason.
  Result_t RawEssenceType(const std::string& filename, EssenceType_t& type);


  //---------------------------------------------------------------------------------
  // base types

  // A simple container for rational numbers.
  class Rational
  {
  public:
    i32_t Numerator;
    i32_t Denominator;

    Rational() : Numerator(0), Denominator(0) {}
    Rational(i32_t n, i32_t d) : Numerator(n), Denominator(d) {}

    inline double Quotient() const {
      return (double)Numerator / (double)Denominator;
    }

    inline bool operator==(const Rational& rhs) const {
      return ( rhs.Numerator == Numerator && rhs.Denominator == Denominator );
    }

    inline bool operator!=(const Rational& rhs) const {
      return ( rhs.Numerator != Numerator || rhs.Denominator != Denominator );
    }

    inline bool operator<(const Rational& rhs) {
      if ( Numerator < rhs.Numerator )     return true;
      if ( Numerator == rhs.Numerator && Denominator < rhs.Denominator )    return true;
      return false;
    }

    inline bool operator>(const Rational& rhs) {
      if ( Numerator > rhs.Numerator )     return true;
      if ( Numerator == rhs.Numerator && Denominator > rhs.Denominator )     return true;
      return false;
    }
  };

  // Encodes a rational number as a string having a single delimiter character between
  // numerator and denominator.  Retuns the buffer pointer to allow convenient in-line use.
  const char* EncodeRational(const Rational&, char* str_buf, ui32_t buf_len, char delimiter = ' ');

  // Decodes a rational number havng a single non-digit delimiter character between
  // the numerator and denominator.  Returns false if the string does not contain
  // the expected syntax.
  bool DecodeRational(const char* str_rat, Rational&);


  // common edit rates, use these instead of hard coded constants
  const Rational EditRate_24 = Rational(24,1);
  const Rational EditRate_23_98 = Rational(24000,1001); // Not a DCI-compliant value!
  const Rational EditRate_48 = Rational(48,1);
  const Rational SampleRate_48k = Rational(48000,1);
  const Rational SampleRate_96k = Rational(96000,1);

  // Additional frame rates, see ST 428-11, ST 429-13
  // These rates are new and not supported by all systems. Do not assume that
  // a package made using one of these rates will work just anywhere!
  const Rational EditRate_25 = Rational(25,1);
  const Rational EditRate_30 = Rational(30,1);
  const Rational EditRate_50 = Rational(50,1);
  const Rational EditRate_60 = Rational(60,1);
  const Rational EditRate_96 = Rational(96,1);
  const Rational EditRate_100 = Rational(100,1);
  const Rational EditRate_120 = Rational(120,1);

  // Archival frame rates, see ST 428-21
  // These rates are new and not supported by all systems. Do not assume that
  // a package made using one of these rates will work just anywhere!
  const Rational EditRate_16 = Rational(16,1);
  const Rational EditRate_18 = Rational(200,11); // 18.182
  const Rational EditRate_20 = Rational(20,1);
  const Rational EditRate_22 = Rational(240,11); // 21.818


  // Non-reference counting container for internal member objects.
  // Please do not use this class for any other purpose.
  template <class T>
    class mem_ptr
    {
      T* m_p; // the thing we point to
      mem_ptr(T&);

    public:
      mem_ptr() : m_p(0) {}
      mem_ptr(T* p) : m_p(p) {}
      ~mem_ptr() { delete m_p; }

      inline T&   operator*()  const { return *m_p; }
      inline T*   operator->() const { return m_p; }
      inline      operator T*()const { return m_p; }
      inline const mem_ptr<T>& operator=(T* p) { set(p); return *this; }
      inline T*   set(T* p)          { delete m_p; m_p = p; return m_p; }
      inline T*   get()        const { return m_p; }
      inline void release()          { m_p = 0; }
      inline bool empty()      const { return m_p == 0; }
    };


  //---------------------------------------------------------------------------------
  // WriterInfo class - encapsulates writer identification details used for
  // OpenWrite() calls.  Replace these values at runtime to identify your product.
  //
  // MXF files use SMPTE Universal Labels to identify data items. The set of Labels
  // in a file is determined by the MXF Operational Pattern and any constraining
  // documentation. There are currently two flavors of AS-DCP file in use: MXF Interop
  // (AKA JPEG Interop) and SMPTE. The two differ in the values of three labels:
  //
  //   OPAtom
  //      Interop : 06 0e 2b 34 04 01 01 01  0d 01 02 01 10 00 00 00
  //      SMPTE   : 06 0e 2b 34 04 01 01 02  0d 01 02 01 10 00 00 00
  //
  //   EKLV Packet:
  //      Interop : 06 0e 2b 34 02 04 01 07  0d 01 03 01 02 7e 01 00
  //      SMPTE   : 06 0e 2b 34 02 04 01 01  0d 01 03 01 02 7e 01 00
  //
  //   GenericDescriptor/SubDescriptors:
  //      Interop : 06 0e 2b 34 01 01 01 02  06 01 01 04 06 10 00 00
  //      SMPTE   : 06 0e 2b 34 01 01 01 09  06 01 01 04 06 10 00 00
  //
  // asdcplib will read any (otherwise valid) file which has any combination of the
  // above values. When writing files, MXF Interop labels are used by default. To
  // write a file containing SMPTE labels, replace the default label set value in
  // the WriterInfo before calling OpenWrite()
  //
  //
  enum LabelSet_t
  {
    LS_MXF_UNKNOWN,
    LS_MXF_INTEROP,
    LS_MXF_SMPTE,
    LS_MAX
  };

  //
  struct WriterInfo
  {
    byte_t      ProductUUID[UUIDlen];
    byte_t      AssetUUID[UUIDlen];
    byte_t      ContextID[UUIDlen];
    byte_t      CryptographicKeyID[UUIDlen];
    bool        EncryptedEssence; // true if essence data is (or is going to be) encrypted
    bool        UsesHMAC;         // true if HMAC exists or is to be calculated
    std::string ProductVersion;
    std::string CompanyName;
    std::string ProductName;
    LabelSet_t  LabelSetType;

    WriterInfo() : EncryptedEssence(false), UsesHMAC(false), LabelSetType(LS_MXF_INTEROP)
    {
      static byte_t default_ProductUUID_Data[UUIDlen] = {
        0x43, 0x05, 0x9a, 0x1d, 0x04, 0x32, 0x41, 0x01,
        0xb8, 0x3f, 0x73, 0x68, 0x15, 0xac, 0xf3, 0x1d };

      memcpy(ProductUUID, default_ProductUUID_Data, UUIDlen);
      memset(AssetUUID, 0, UUIDlen);
      memset(ContextID, 0, UUIDlen);
      memset(CryptographicKeyID, 0, UUIDlen);

      ProductVersion = "Unreleased ";
      ProductVersion += Version();
      CompanyName = "DCI";
      ProductName = "asdcplib";
    }
  };

  // Print WriterInfo to std::ostream
  std::ostream& operator << (std::ostream& strm, const WriterInfo& winfo);
  // Print WriterInfo to stream, stderr by default.
  void WriterInfoDump(const WriterInfo&, FILE* = 0);

  //---------------------------------------------------------------------------------
  // cryptographic support

  // The following classes define interfaces to Rijndael contexts having the following properties:
  //  o 16 byte key
  //  o CBC mode with 16 byte block size
  const ui32_t CBC_KEY_SIZE = 16;
  const ui32_t CBC_BLOCK_SIZE = 16;
  const ui32_t HMAC_SIZE = 20;

  //
  class AESEncContext
    {
      class h__AESContext;
      mem_ptr<h__AESContext> m_Context;
      ASDCP_NO_COPY_CONSTRUCT(AESEncContext);

    public:
      AESEncContext();
      ~AESEncContext();

      // Initializes Rijndael CBC encryption context.
      // Returns error if the key argument is NULL.
      Result_t InitKey(const byte_t* key);

      // Initializes 16 byte CBC Initialization Vector. This operation may be performed
      // any number of times for a given key.
      // Returns error if the i_vec argument is NULL.
      Result_t SetIVec(const byte_t* i_vec);
      Result_t GetIVec(byte_t* i_vec) const;

      // Encrypt a block of data. The block size must be a multiple of CBC_BLOCK_SIZE.
      // Returns error if either argument is NULL.
      Result_t EncryptBlock(const byte_t* pt_buf, byte_t* ct_buf, ui32_t block_size);
    };

  //
  class AESDecContext
    {
      class h__AESContext;
      mem_ptr<h__AESContext> m_Context;
      ASDCP_NO_COPY_CONSTRUCT(AESDecContext);

    public:
      AESDecContext();
      ~AESDecContext();

      // Initializes Rijndael CBC decryption context.
      // Returns error if the key argument is NULL.
      Result_t InitKey(const byte_t* key);

      // Initializes 16 byte CBC Initialization Vector. This operation may be performed
      // any number of times for a given key.
      // Returns error if the i_vec argument is NULL.
      Result_t SetIVec(const byte_t* i_vec);

      // Decrypt a block of data. The block size must be a multiple of CBC_BLOCK_SIZE.
      // Returns error if either argument is NULL.
      Result_t DecryptBlock(const byte_t* ct_buf, byte_t* pt_buf, ui32_t block_size);
    };

  //
  class HMACContext
    {
      class h__HMACContext;
      mem_ptr<h__HMACContext> m_Context;
      ASDCP_NO_COPY_CONSTRUCT(HMACContext);

    public:
      HMACContext();
      ~HMACContext();

      // Initializes HMAC context. The key argument must point to a binary
      // key that is CBC_KEY_SIZE bytes in length. Returns error if the key
      // argument is NULL.
      Result_t InitKey(const byte_t* key, LabelSet_t);

      // Reset internal state, allows repeated cycles of Update -> Finalize
      void Reset();

      // Add data to the digest. Returns error if the key argument is NULL or
      // if the digest has been finalized.
      Result_t Update(const byte_t* buf, ui32_t buf_len);

      // Finalize digest.  Returns error if the digest has already been finalized.
      Result_t Finalize();

      // Writes HMAC value to given buffer. buf must point to a writable area of
      // memory that is at least HMAC_SIZE bytes in length. Returns error if the
      // buf argument is NULL or if the digest has not been finalized.
      Result_t GetHMACValue(byte_t* buf) const;

      // Tests the given value against the finalized value in the object. buf must
      // point to a readable area of memory that is at least HMAC_SIZE bytes in length.
      // Returns error if the buf argument is NULL or if the values do ot match.
      Result_t TestHMACValue(const byte_t* buf) const;
    };

  //---------------------------------------------------------------------------------
  // frame buffer base class
  //
  // The supported essence types are stored using per-frame KLV packetization. The
  // following class implements essence-neutral functionality for managing a buffer
  // containing a frame of essence.

  class FrameBuffer
    {
      ASDCP_NO_COPY_CONSTRUCT(FrameBuffer);

    protected:
      byte_t* m_Data;          // pointer to memory area containing frame data
      ui32_t  m_Capacity;      // size of memory area pointed to by m_Data
      bool    m_OwnMem;        // if false, m_Data points to externally allocated memory
      ui32_t  m_Size;          // size of frame data in memory area pointed to by m_Data
      ui32_t  m_FrameNumber;   // delivery-order frame number

      // It is possible to read raw ciphertext from an encrypted AS-DCP file.
      // After reading an encrypted AS-DCP file in raw mode, the frame buffer will
      // contain the encrypted source value portion of the Encrypted Triplet, followed
      // by the integrity pack, if it exists.
      // The buffer will begin with the IV and CheckValue, followed by encrypted essence
      // and optional integrity pack
      // The SourceLength and PlaintextOffset values from the packet will be held in the
      // following variables:
      ui32_t  m_SourceLength;       // plaintext length (delivered plaintext+decrypted ciphertext)
      ui32_t  m_PlaintextOffset;    // offset to first byte of ciphertext

     public:
      FrameBuffer();
      virtual ~FrameBuffer();

      // Instructs the object to use an externally allocated buffer. The external
      // buffer will not be cleaned up by the frame buffer when it exits.
      // Call with (0,0) to revert to internally allocated buffer.
      // Returns error if the buf_addr argument is NULL and buf_size is non-zero.
      Result_t SetData(byte_t* buf_addr, ui32_t buf_size);

      // Sets the size of the internally allocate buffer. Returns RESULT_CAPEXTMEM
      // if the object is using an externally allocated buffer via SetData();
      // Resets content size to zero.
      Result_t Capacity(ui32_t cap);

      // returns the size of the buffer
      inline ui32_t  Capacity() const { return m_Capacity; }

      // returns a const pointer to the essence data
      inline const byte_t* RoData() const { return m_Data; }

      // returns a non-const pointer to the essence data
      inline byte_t* Data() { return m_Data; }

      // set the size of the buffer's contents
      inline ui32_t  Size(ui32_t size) { return m_Size = size; }

      // returns the size of the buffer's contents
      inline ui32_t  Size() const { return m_Size; }

      // Sets the absolute frame number of this frame in the file in delivery order.
      inline void    FrameNumber(ui32_t num) { m_FrameNumber = num; }

      // Returns the absolute frame number of this frame in the file in delivery order.
      inline ui32_t  FrameNumber() const { return m_FrameNumber; }

      // Sets the length of the plaintext essence data
      inline void    SourceLength(ui32_t len) { m_SourceLength = len; }

      // When this value is 0 (zero), the buffer contains only plaintext. When it is
      // non-zero, the buffer contains raw ciphertext and the return value is the length
      // of the original plaintext.
      inline ui32_t  SourceLength() const { return m_SourceLength; }

      // Sets the offset into the buffer at which encrypted data begins
      inline void    PlaintextOffset(ui32_t ofst) { m_PlaintextOffset = ofst; }

      // Returns offset into buffer of first byte of ciphertext.
      inline ui32_t  PlaintextOffset() const { return m_PlaintextOffset; }
    };

  //---------------------------------------------------------------------------------
  // Accessors in the MXFReader and MXFWriter classes below return these types to
  // provide direct access to MXF metadata structures declared in MXF.h and Metadata.h

  namespace MXF {
    // #include<Metadata.h> to use these
    class OP1aHeader;
    class OPAtomIndexFooter;
    class RIP;
  };

  //---------------------------------------------------------------------------------
  // MPEG2 video elementary stream support

  //
  namespace MPEG2
    {
      // MPEG picture coding type
      enum FrameType_t {
        FRAME_U = 0x00, // Unknown
        FRAME_I = 0x01, // I-Frame
        FRAME_P = 0x02, // P-Frame
        FRAME_B = 0x03  // B-Frame
      };

      // convert FrameType_t to char
      inline char FrameTypeChar(FrameType_t type)
        {
          switch ( type )
            {
            case FRAME_I: return 'I';
            case FRAME_B: return 'B';
            case FRAME_P: return 'P';
            default: return 'U';
            }
        }

      // Structure represents the metadata elements in the file header's
      // MPEG2VideoDescriptor object.
      struct VideoDescriptor
        {
          Rational EditRate;                //
          ui32_t   FrameRate;               //
          Rational SampleRate;              //
          ui8_t    FrameLayout;             //
          ui32_t   StoredWidth;             //
          ui32_t   StoredHeight;            //
          Rational AspectRatio;             //
          ui32_t   ComponentDepth;          //
          ui32_t   HorizontalSubsampling;   //
          ui32_t   VerticalSubsampling;     //
          ui8_t    ColorSiting;             //
          ui8_t    CodedContentType;        //
          bool     LowDelay;                //
          ui32_t   BitRate;                 //
          ui8_t    ProfileAndLevel;         //
          ui32_t   ContainerDuration;       //
      };

      // Print VideoDescriptor to std::ostream
      std::ostream& operator << (std::ostream& strm, const VideoDescriptor& vdesc);
      // Print VideoDescriptor to stream, stderr by default.
      void VideoDescriptorDump(const VideoDescriptor&, FILE* = 0);

      // A container for MPEG frame data.
      class FrameBuffer : public ASDCP::FrameBuffer
        {
          ASDCP_NO_COPY_CONSTRUCT(FrameBuffer); // TODO: should have copy construct

        protected:
          FrameType_t m_FrameType;
          ui8_t       m_TemporalOffset;
          bool        m_ClosedGOP;
          bool        m_GOPStart;

        public:
          FrameBuffer() :
            m_FrameType(FRAME_U), m_TemporalOffset(0),
            m_ClosedGOP(false), m_GOPStart(false) {}

          FrameBuffer(ui32_t size) :
            m_FrameType(FRAME_U), m_TemporalOffset(0),
            m_ClosedGOP(false), m_GOPStart(false)
            {
              Capacity(size);
            }

          virtual ~FrameBuffer() {}

          // Sets the MPEG frame type of the picture data in the frame buffer.
          inline void FrameType(FrameType_t type) { m_FrameType = type; }

          // Returns the MPEG frame type of the picture data in the frame buffer.
          inline FrameType_t FrameType() const { return m_FrameType; }

          // Sets the MPEG temporal offset of the picture data in the frame buffer.
          inline void TemporalOffset(ui8_t offset) { m_TemporalOffset = offset; }

          // Returns the MPEG temporal offset of the picture data in the frame buffer.
          inline ui8_t TemporalOffset() const { return m_TemporalOffset; }

          // Sets the MPEG GOP 'start' attribute for the frame buffer.
          inline void GOPStart(bool start) { m_GOPStart = start; }

          // True if the frame in the buffer is the first in the GOP (in transport order)
          inline bool GOPStart() const { return m_GOPStart; }

          // Sets the MPEG GOP 'closed' attribute for the frame buffer.
          inline void ClosedGOP(bool closed) { m_ClosedGOP = closed; }

          // Returns true if the frame in the buffer is from a closed GOP, false if
          // the frame is from an open GOP.  Always returns false unless GOPStart()
          // returns true.
          inline bool ClosedGOP() const { return m_ClosedGOP; }

          // Print object state to stream, include n bytes of frame data if indicated.
          // Default stream is stderr.
          void    Dump(FILE* = 0, ui32_t dump_len = 0) const;
        };


      // An object which opens and reads an MPEG2 Video Elementary Stream file.  The call to
      // OpenRead() reads metadata from the file and populates an internal VideoDescriptor object.
      // Each subsequent call to ReadFrame() reads exactly one frame from the stream into the
      // given FrameBuffer object.
      class Parser
        {
          class h__Parser;
          mem_ptr<h__Parser> m_Parser;
          ASDCP_NO_COPY_CONSTRUCT(Parser);

        public:
          Parser();
          virtual ~Parser();

          // Opens the stream for reading, parses enough data to provide a complete
          // set of stream metadata for the MXFWriter below.
          Result_t OpenRead(const std::string& filename) const;

          // Fill a VideoDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillVideoDescriptor(VideoDescriptor&) const;

          // Rewind the stream to the beginning.
          Result_t Reset() const;

          // Reads the next sequential frame in the input file and places it in the
          // frame buffer. Fails if the buffer is too small or the stream is empty.
          // The frame buffer's PlaintextOffset parameter will be set to the first
          // data byte of the first slice. Set this value to zero if you want
          // encrypted headers.
          Result_t ReadFrame(FrameBuffer&) const;
        };

      // A class which creates and writes MPEG frame data to an AS-DCP format MXF file.
      // Not yet implemented
      class MXFWriter
        {
          class h__Writer;
          mem_ptr<h__Writer> m_Writer;
          ASDCP_NO_COPY_CONSTRUCT(MXFWriter);

        public:
          MXFWriter();
          virtual ~MXFWriter();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for writing. The file must not exist. Returns error if
          // the operation cannot be completed or if nonsensical data is discovered
          // in the essence descriptor.
          Result_t OpenWrite(const std::string& filename, const WriterInfo&,
                             const VideoDescriptor&, ui32_t HeaderSize = 16384);

          // Writes a frame of essence to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs.
          Result_t WriteFrame(const FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);

          // Closes the MXF file, writing the index and revised header.
          Result_t Finalize();
        };

      // A class which reads MPEG frame data from an AS-DCP format MXF file.
      class MXFReader
        {
          class h__Reader;
          mem_ptr<h__Reader> m_Reader;
          ASDCP_NO_COPY_CONSTRUCT(MXFReader);

        public:
          MXFReader();
          virtual ~MXFReader();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for reading. The file must exist. Returns error if the
          // operation cannot be completed.
          Result_t OpenRead(const std::string& filename) const;

          // Returns RESULT_INIT if the file is not open.
          Result_t Close() const;

          // Fill a VideoDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillVideoDescriptor(VideoDescriptor&) const;

          // Fill a WriterInfo struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillWriterInfo(WriterInfo&) const;

          // Reads a frame of essence from the MXF file. If the optional AESEncContext
          // argument is present, the essence is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadFrame(ui32_t frame_number, FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Using the index table read from the footer partition, lookup the frame number
          // and return the offset into the file at which to read that frame of essence.
          // Returns RESULT_INIT if the file is not open, and RESULT_RANGE if the frame number is
          // out of range.
          Result_t LocateFrame(ui32_t FrameNum, Kumu::fpos_t& streamOffset, i8_t& temporalOffset, i8_t& keyFrameOffset) const;

          // Calculates the first frame in transport order of the GOP in which the requested
          // frame is located.  Calls ReadFrame() to fetch the frame at the calculated position.
          // Returns RESULT_INIT if the file is not open.
          Result_t ReadFrameGOPStart(ui32_t frame_number, FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Calculates the first frame in transport order of the GOP in which the requested
          // frame is located.  Sets key_frame_number to the number of the frame at the calculated position.
          // Returns RESULT_INIT if the file is not open.
          Result_t FindFrameGOPStart(ui32_t frame_number, ui32_t& key_frame_number) const;

          // Returns the type of the frame at the given position.
          // Returns RESULT_INIT if the file is not open or RESULT_RANGE if the index is out of range.
          Result_t FrameType(ui32_t frame_number, FrameType_t&) const;

          // Print debugging information to stream
          void     DumpHeaderMetadata(FILE* = 0) const;
          void     DumpIndex(FILE* = 0) const;
        };
    } // namespace MPEG2

  //---------------------------------------------------------------------------------
  //



  namespace PCM
    {
      // The default value of the ChannelFormat element of the AudioDescriptor struct
      // is CF_NONE. If the value is set to one of the other ChannelFormat_t enum
      // values, the file's Wave Audio Descriptor will contain a Channel Assignment
      // element.
      //
      // The channel format should be one of (CF_CFG_1, CF_CFG_2, or CF_CFG_3) for
      // SMPTE 429-2 files. It should normally be CF_NONE for JPEG Interop files, but
      // the 429-2 may also be used.
      //
      enum ChannelFormat_t {
        CF_NONE,
        CF_CFG_1, // 5.1 with optional HI/VI
        CF_CFG_2, // 6.1 (5.1 + center surround) with optional HI/VI
        CF_CFG_3, // 7.1 (SDDS) with optional HI/VI
        CF_CFG_4, // Wild Track Format
        CF_CFG_5, // 7.1 DS with optional HI/VI
        CF_CFG_6, // ST 377-4 (MCA) labels (see also ASDCP::MXF::decode_mca_string)
        CF_MAXIMUM
      };

      struct AudioDescriptor
        {
          Rational EditRate;         // rate of frame wrapping
          Rational AudioSamplingRate;  // rate of audio sample
          ui32_t   Locked;             //
          ui32_t   ChannelCount;       // number of channels
          ui32_t   QuantizationBits;   // number of bits per single-channel sample
          ui32_t   BlockAlign;         // number of bytes ber sample, all channels
          ui32_t   AvgBps;             //
          ui32_t   LinkedTrackID;      //
          ui32_t   ContainerDuration;  // number of frames
          ChannelFormat_t ChannelFormat; // audio channel arrangement
      };

      // Print AudioDescriptor to std::ostream
      std::ostream& operator << (std::ostream& strm, const AudioDescriptor& adesc);
      // Print debugging information to stream (stderr default)
      void   AudioDescriptorDump(const AudioDescriptor&, FILE* = 0);

      // Returns size in bytes of a single sample of data described by ADesc
      inline ui32_t CalcSampleSize(const AudioDescriptor& ADesc)
        {
          return (ADesc.QuantizationBits / 8) * ADesc.ChannelCount;
        }

      // Returns number of samples per frame of data described by ADesc
      inline ui32_t CalcSamplesPerFrame(const AudioDescriptor& ADesc)
        {
          double tmpd = ADesc.AudioSamplingRate.Quotient() / ADesc.EditRate.Quotient();
          return (ui32_t)ceil(tmpd);
        }

      // Returns the size in bytes of a frame of data described by ADesc
      inline ui32_t CalcFrameBufferSize(const AudioDescriptor& ADesc)
        {
          return CalcSampleSize(ADesc) * CalcSamplesPerFrame(ADesc);
        }

      //
      class FrameBuffer : public ASDCP::FrameBuffer
        {
        public:
          FrameBuffer() {}
          FrameBuffer(ui32_t size) { Capacity(size); }
          virtual ~FrameBuffer() {}

          // Print debugging information to stream (stderr default)
          void Dump(FILE* = 0, ui32_t dump_bytes = 0) const;
        };

      // An object which opens and reads a WAV file.  The call to OpenRead() reads metadata from
      // the file and populates an internal AudioDescriptor object. Each subsequent call to
      // ReadFrame() reads exactly one frame from the stream into the given FrameBuffer object.
      // A "frame" is either 2000 or 2002 samples, depending upon the value of PictureRate.
      class WAVParser
        {
          class h__WAVParser;
          mem_ptr<h__WAVParser> m_Parser;
          ASDCP_NO_COPY_CONSTRUCT(WAVParser);

        public:
          WAVParser();
          virtual ~WAVParser();

          // Opens the stream for reading, parses enough data to provide a complete
          // set of stream metadata for the MXFWriter below. PictureRate controls
          // ther frame rate for the MXF frame wrapping option.
          Result_t OpenRead(const std::string& filename, const Rational& PictureRate) const;

          // Fill an AudioDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillAudioDescriptor(AudioDescriptor&) const;

          // Rewind the stream to the beginning.
          Result_t Reset() const;

          // Reads the next sequential frame in the input file and places it in the
          // frame buffer. Fails if the buffer is too small or the stream is empty.
          Result_t ReadFrame(FrameBuffer&) const;
        };


      //
      class MXFWriter
        {
          class h__Writer;
          mem_ptr<h__Writer> m_Writer;
          ASDCP_NO_COPY_CONSTRUCT(MXFWriter);

        public:
          MXFWriter();
          virtual ~MXFWriter();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for writing. The file must not exist. Returns error if
          // the operation cannot be completed or if nonsensical data is discovered
          // in the essence descriptor.
          Result_t OpenWrite(const std::string& filename, const WriterInfo&,
                             const AudioDescriptor&, ui32_t HeaderSize = 16384);

          // Writes a frame of essence to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs.
          Result_t WriteFrame(const FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);

          // Closes the MXF file, writing the index and revised header.
          Result_t Finalize();
        };

      //
      class MXFReader
        {
          class h__Reader;
          mem_ptr<h__Reader> m_Reader;
          ASDCP_NO_COPY_CONSTRUCT(MXFReader);

        public:
          MXFReader();
          virtual ~MXFReader();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for reading. The file must exist. Returns error if the
          // operation cannot be completed.
          Result_t OpenRead(const std::string& filename) const;

          // Returns RESULT_INIT if the file is not open.
          Result_t Close() const;

          // Fill an AudioDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillAudioDescriptor(AudioDescriptor&) const;

          // Fill a WriterInfo struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillWriterInfo(WriterInfo&) const;

          // Reads a frame of essence from the MXF file. If the optional AESEncContext
          // argument is present, the essence is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadFrame(ui32_t frame_number, FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Using the index table read from the footer partition, lookup the frame number
          // and return the offset into the file at which to read that frame of essence.
          // Returns RESULT_INIT if the file is not open, and RESULT_RANGE if the frame number is
          // out of range.
          Result_t LocateFrame(ui32_t FrameNum, Kumu::fpos_t& streamOffset, i8_t& temporalOffset, i8_t& keyFrameOffset) const;

          // Print debugging information to stream
          void     DumpHeaderMetadata(FILE* = 0) const;
          void     DumpIndex(FILE* = 0) const;
        };
    } // namespace PCM

  //---------------------------------------------------------------------------------
  //
  namespace JP2K
    {
      const ui32_t MaxComponents = 3;
      const ui32_t MaxPrecincts = 32; // ISO 15444-1 Annex A.6.1
      const ui32_t MaxDefaults = 256; // made up

#pragma pack(1)
      struct ImageComponent_t  // ISO 15444-1 Annex A.5.1
      {
        ui8_t Ssize;
        ui8_t XRsize;
        ui8_t YRsize;
      };

      struct CodingStyleDefault_t // ISO 15444-1 Annex A.6.1
      {
        ui8_t   Scod;

        struct
        {
          ui8_t  ProgressionOrder;
          ui8_t  NumberOfLayers[sizeof(ui16_t)];
          ui8_t  MultiCompTransform;
        } SGcod;

        struct
        {
          ui8_t  DecompositionLevels;
          ui8_t  CodeblockWidth;
          ui8_t  CodeblockHeight;
          ui8_t  CodeblockStyle;
          ui8_t  Transformation;
          ui8_t  PrecinctSize[MaxPrecincts];
        } SPcod;
      };

      struct QuantizationDefault_t // ISO 15444-1 Annex A.6.4
      {
        ui8_t  Sqcd;
        ui8_t  SPqcd[MaxDefaults];
        ui8_t  SPqcdLength;
      };
#pragma pack()

      struct PictureDescriptor
      {
        Rational       EditRate;
        ui32_t         ContainerDuration;
        Rational       SampleRate;
        ui32_t         StoredWidth;
        ui32_t         StoredHeight;
        Rational       AspectRatio;
        ui16_t         Rsize;
        ui32_t         Xsize;
        ui32_t         Ysize;
        ui32_t         XOsize;
        ui32_t         YOsize;
        ui32_t         XTsize;
        ui32_t         YTsize;
        ui32_t         XTOsize;
        ui32_t         YTOsize;
        ui16_t         Csize;
        ImageComponent_t      ImageComponents[MaxComponents];
        CodingStyleDefault_t  CodingStyleDefault;
        QuantizationDefault_t QuantizationDefault;
      };

      // Print debugging information to std::ostream
      std::ostream& operator << (std::ostream& strm, const PictureDescriptor& pdesc);
      // Print debugging information to stream (stderr default)
      void   PictureDescriptorDump(const PictureDescriptor&, FILE* = 0);

      //
      class FrameBuffer : public ASDCP::FrameBuffer
        {
        public:
          FrameBuffer() {}
          FrameBuffer(ui32_t size) { Capacity(size); }
          virtual ~FrameBuffer() {}

          // Print debugging information to stream (stderr default)
          void Dump(FILE* = 0, ui32_t dump_bytes = 0) const;
        };


      // An object which opens and reads a JPEG 2000 codestream file.  The file is expected
      // to contain exactly one complete frame of picture essence as an unwrapped (raw)
      // ISO/IEC 15444 codestream.
      class CodestreamParser
        {
          class h__CodestreamParser;
          mem_ptr<h__CodestreamParser> m_Parser;
          ASDCP_NO_COPY_CONSTRUCT(CodestreamParser);

        public:
          CodestreamParser();
          virtual ~CodestreamParser();

          // Opens a file for reading, parses enough data to provide a complete
          // set of stream metadata for the MXFWriter below.
          // The frame buffer's PlaintextOffset parameter will be set to the first
          // byte of the data segment. Set this value to zero if you want
          // encrypted headers.
          Result_t OpenReadFrame(const std::string& filename, FrameBuffer&) const;

          // Fill a PictureDescriptor struct with the values from the file's codestream.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillPictureDescriptor(PictureDescriptor&) const;
        };

      // Parses the data in the frame buffer to fill in the picture descriptor. Copies
      // the offset of the image data into start_of_data. Returns error if the parser fails.
      Result_t ParseMetadataIntoDesc(const FrameBuffer&, PictureDescriptor&, byte_t* start_of_data = 0);

      // An object which reads a sequence of files containing JPEG 2000 pictures.
      class SequenceParser
        {
          class h__SequenceParser;
          mem_ptr<h__SequenceParser> m_Parser;
          ASDCP_NO_COPY_CONSTRUCT(SequenceParser);

        public:
          SequenceParser();
          virtual ~SequenceParser();

          // Opens a directory for reading.  The directory is expected to contain one or
          // more files, each containing the codestream for exactly one picture. The
          // files must be named such that the frames are in temporal order when sorted
          // alphabetically by filename. The parser will automatically parse enough data
          // from the first file to provide a complete set of stream metadata for the
          // MXFWriter below.  If the "pedantic" parameter is given and is true, the
          // parser will check the metadata for each codestream and fail if a
          // mismatch is detected.
          Result_t OpenRead(const std::string& filename, bool pedantic = false) const;

          // Opens a file sequence for reading.  The sequence is expected to contain one or
          // more filenames, each naming a file containing the codestream for exactly one
          // picture. The parser will automatically parse enough data
          // from the first file to provide a complete set of stream metadata for the
          // MXFWriter below.  If the "pedantic" parameter is given and is true, the
          // parser will check the metadata for each codestream and fail if a
          // mismatch is detected.
          Result_t OpenRead(const std::list<std::string>& file_list, bool pedantic = false) const;

          // Fill a PictureDescriptor struct with the values from the first file's codestream.
          // Returns RESULT_INIT if the directory is not open.
          Result_t FillPictureDescriptor(PictureDescriptor&) const;

          // Rewind the directory to the beginning.
          Result_t Reset() const;

          // Reads the next sequential frame in the directory and places it in the
          // frame buffer. Fails if the buffer is too small or the direcdtory
          // contains no more files.
          // The frame buffer's PlaintextOffset parameter will be set to the first
          // byte of the data segment. Set this value to zero if you want
          // encrypted headers.
          Result_t ReadFrame(FrameBuffer&) const;
        };


      //
      class MXFWriter
        {
          class h__Writer;
          mem_ptr<h__Writer> m_Writer;
          ASDCP_NO_COPY_CONSTRUCT(MXFWriter);

        public:
          MXFWriter();
          virtual ~MXFWriter();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for writing. The file must not exist. Returns error if
          // the operation cannot be completed or if nonsensical data is discovered
          // in the essence descriptor.
          Result_t OpenWrite(const std::string& filename, const WriterInfo&,
                             const PictureDescriptor&, ui32_t HeaderSize = 16384);

          // Writes a frame of essence to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs.
          Result_t WriteFrame(const FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);

          // Closes the MXF file, writing the index and revised header.
          Result_t Finalize();
        };

      //
      class MXFReader
        {
          class h__Reader;
          mem_ptr<h__Reader> m_Reader;
          ASDCP_NO_COPY_CONSTRUCT(MXFReader);

        public:
          MXFReader();
          virtual ~MXFReader();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for reading. The file must exist. Returns error if the
          // operation cannot be completed.
          Result_t OpenRead(const std::string& filename) const;

          // Returns RESULT_INIT if the file is not open.
          Result_t Close() const;

          // Fill an AudioDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillPictureDescriptor(PictureDescriptor&) const;

          // Fill a WriterInfo struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillWriterInfo(WriterInfo&) const;

          // Reads a frame of essence from the MXF file. If the optional AESEncContext
          // argument is present, the essence is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadFrame(ui32_t frame_number, FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Using the index table read from the footer partition, lookup the frame number
          // and return the offset into the file at which to read that frame of essence.
          // Returns RESULT_INIT if the file is not open, and RESULT_FRAME if the frame number is
          // out of range.
          Result_t LocateFrame(ui32_t FrameNum, Kumu::fpos_t& streamOffset, i8_t& temporalOffset, i8_t& keyFrameOffset) const;

          // Print debugging information to stream
          void     DumpHeaderMetadata(FILE* = 0) const;
          void     DumpIndex(FILE* = 0) const;
        };


      // Stereoscopic Image support
      //

      enum StereoscopicPhase_t
      {
        SP_LEFT,
        SP_RIGHT
      };

      struct SFrameBuffer
      {
        JP2K::FrameBuffer Left;
        JP2K::FrameBuffer Right;

        SFrameBuffer(ui32_t size) {
          Left.Capacity(size);
          Right.Capacity(size);
        }
      };

      class MXFSWriter
      {
          class h__SWriter;
          mem_ptr<h__SWriter> m_Writer;
          ASDCP_NO_COPY_CONSTRUCT(MXFSWriter);

        public:
          MXFSWriter();
          virtual ~MXFSWriter();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for writing. The file must not exist. Returns error if
          // the operation cannot be completed or if nonsensical data is discovered
          // in the essence descriptor.
          Result_t OpenWrite(const std::string& filename, const WriterInfo&,
                             const PictureDescriptor&, ui32_t HeaderSize = 16384);

          // Writes a pair of frames of essence to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs.
          Result_t WriteFrame(const SFrameBuffer&, AESEncContext* = 0, HMACContext* = 0);

          // Writes a frame of essence to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs. Frames must be written in the proper phase (L-R-L-R),
          // RESULT_SPHASE will be returned if phase is reversed. The first frame
          // written must be left eye.
          Result_t WriteFrame(const FrameBuffer&, StereoscopicPhase_t phase,
                              AESEncContext* = 0, HMACContext* = 0);

          // Closes the MXF file, writing the index and revised header.  Returns
          // RESULT_SPHASE if WriteFrame was called an odd number of times.
          Result_t Finalize();
        };

      //
      class MXFSReader
        {
          class h__SReader;
          mem_ptr<h__SReader> m_Reader;
          ASDCP_NO_COPY_CONSTRUCT(MXFSReader);

        public:
          MXFSReader();
          virtual ~MXFSReader();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for reading. The file must exist. Returns error if the
          // operation cannot be completed.
          Result_t OpenRead(const std::string& filename) const;

          // Returns RESULT_INIT if the file is not open.
          Result_t Close() const;

          // Fill an AudioDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillPictureDescriptor(PictureDescriptor&) const;

          // Fill a WriterInfo struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillWriterInfo(WriterInfo&) const;

          // Reads a pair of frames of essence from the MXF file. If the optional AESEncContext
          // argument is present, the essence is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadFrame(ui32_t frame_number, SFrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Reads a frame of essence from the MXF file. If the optional AESEncContext
          // argument is present, the essence is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadFrame(ui32_t frame_number, StereoscopicPhase_t phase,
                             FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Using the index table read from the footer partition, lookup the frame number
          // and return the offset into the file at which to read that frame of essence.
          // Returns RESULT_INIT if the file is not open, and RESULT_FRAME if the frame number is
          // out of range.
          Result_t LocateFrame(ui32_t FrameNum, Kumu::fpos_t& streamOffset, i8_t& temporalOffset, i8_t& keyFrameOffset) const;

          // Print debugging information to stream
          void     DumpHeaderMetadata(FILE* = 0) const;
          void     DumpIndex(FILE* = 0) const;
        };
    } // namespace JP2K

  //---------------------------------------------------------------------------------
  //
  namespace TimedText
    {
      enum MIMEType_t { MT_BIN, MT_PNG, MT_OPENTYPE };

      struct TimedTextResourceDescriptor
      {
        byte_t      ResourceID[UUIDlen];
          MIMEType_t  Type;

        TimedTextResourceDescriptor() : Type(MT_BIN) {}
      };

      typedef std::list<TimedTextResourceDescriptor> ResourceList_t;

      struct TimedTextDescriptor
      {
        Rational       EditRate;                //
        ui32_t         ContainerDuration;
        byte_t         AssetID[UUIDlen];
        std::string    NamespaceName;
        std::string    EncodingName;
        ResourceList_t ResourceList;

      TimedTextDescriptor() : ContainerDuration(0), EncodingName("UTF-8") {} // D-Cinema format is always UTF-8
      };

      // Print debugging information to std::ostream
      std::ostream& operator << (std::ostream& strm, const TimedTextDescriptor& tinfo);
      // Print debugging information to stream (stderr default)
      void   DescriptorDump(const TimedTextDescriptor&, FILE* = 0);

      //
      class FrameBuffer : public ASDCP::FrameBuffer
      {
        ASDCP_NO_COPY_CONSTRUCT(FrameBuffer); // TODO: should have copy construct

      protected:
        byte_t      m_AssetID[UUIDlen];
        std::string m_MIMEType;

      public:
        FrameBuffer() { memset(m_AssetID, 0, UUIDlen); }
        FrameBuffer(ui32_t size) { Capacity(size); memset(m_AssetID, 0, UUIDlen); }
        virtual ~FrameBuffer() {}

        inline const byte_t* AssetID() const { return m_AssetID; }
        inline void          AssetID(const byte_t* buf) { memcpy(m_AssetID, buf, UUIDlen); }
        inline const char*   MIMEType() const { return m_MIMEType.c_str(); }
        inline void          MIMEType(const std::string& s) { m_MIMEType = s; }

        // Print debugging information to stream (stderr default)
        void Dump(FILE* = 0, ui32_t dump_bytes = 0) const;
      };

      // An abstract base for a lookup service that returns the resource data
      // identified by the given ancillary resource id.
      //
      class IResourceResolver
      {
      public:
        virtual ~IResourceResolver() {}
        virtual Result_t ResolveRID(const byte_t* uuid, FrameBuffer&) const = 0; // return data for RID
      };

      // Resolves resource references by testing the named directory for file names containing
      // the respective UUID.
      //
      class LocalFilenameResolver : public ASDCP::TimedText::IResourceResolver
        {
          std::string m_Dirname;
          ASDCP_NO_COPY_CONSTRUCT(LocalFilenameResolver);

        public:
          LocalFilenameResolver();
          Result_t OpenRead(const std::string& dirname);
          Result_t ResolveRID(const byte_t* uuid, FrameBuffer& FrameBuf) const;
        };

      //
      class DCSubtitleParser
        {
          class h__SubtitleParser;
          mem_ptr<h__SubtitleParser> m_Parser;
          ASDCP_NO_COPY_CONSTRUCT(DCSubtitleParser);

        public:
          DCSubtitleParser();
          virtual ~DCSubtitleParser();

          // Opens an XML file for reading, parses data to provide a complete
          // set of stream metadata for the MXFWriter below.
          Result_t OpenRead(const std::string& filename) const;

          // Parses an XML document to provide a complete set of stream metadata
          // for the MXFWriter below. The optional filename argument is used to
          // initialize the default resource resolver (see ReadAncillaryResource).
          Result_t OpenRead(const std::string& xml_doc, const std::string& filename) const;

          // Fill a TimedTextDescriptor struct with the values from the file's contents.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillTimedTextDescriptor(TimedTextDescriptor&) const;

          // Reads the complete Timed Text Resource into the given string.
          Result_t ReadTimedTextResource(std::string&) const;

          // Reads the Ancillary Resource having the given ID. Fails if the buffer
          // is too small or the resource does not exist. The optional Resolver
          // argument can be provided which will be used to retrieve the resource
          // having a particulat UUID. If a Resolver is not supplied, the default
          // internal resolver will return the contents of the file having the UUID
          // as the filename. The filename must exist in the same directory as the
          // XML file opened with OpenRead().
          Result_t ReadAncillaryResource(const byte_t* uuid, FrameBuffer&,
                                         const IResourceResolver* Resolver = 0) const;
        };

      //
      class MXFWriter
        {
          class h__Writer;
          mem_ptr<h__Writer> m_Writer;
          ASDCP_NO_COPY_CONSTRUCT(MXFWriter);

        public:
          MXFWriter();
          virtual ~MXFWriter();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for writing. The file must not exist. Returns error if
          // the operation cannot be completed or if nonsensical data is discovered
          // in the essence descriptor.
          Result_t OpenWrite(const std::string& filename, const WriterInfo&,
                             const TimedTextDescriptor&, ui32_t HeaderSize = 16384);

          // Writes the Timed-Text Resource to the MXF file. The file must be UTF-8
          // encoded. If the optional AESEncContext argument is present, the essence
          // is encrypted prior to writing. Fails if the file is not open, is finalized,
          // or an operating system error occurs.
          // This method may only be called once, and it must be called before any
          // call to WriteAncillaryResource(). RESULT_STATE will be returned if these
          // conditions are not met.
          Result_t WriteTimedTextResource(const std::string& XMLDoc, AESEncContext* = 0, HMACContext* = 0);

          // Writes an Ancillary Resource to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs. RESULT_STATE will be returned if the method is called before
          // WriteTimedTextResource()
          Result_t WriteAncillaryResource(const FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);

          // Closes the MXF file, writing the index and revised header.
          Result_t Finalize();
        };

      //
      class MXFReader
        {
          class h__Reader;
          mem_ptr<h__Reader> m_Reader;
          ASDCP_NO_COPY_CONSTRUCT(MXFReader);

        public:
          MXFReader();
          virtual ~MXFReader();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for reading. The file must exist. Returns error if the
          // operation cannot be completed.
          Result_t OpenRead(const std::string& filename) const;

          // Returns RESULT_INIT if the file is not open.
          Result_t Close() const;

          // Fill a TimedTextDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillTimedTextDescriptor(TimedTextDescriptor&) const;

          // Fill a WriterInfo struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillWriterInfo(WriterInfo&) const;

          // Reads the complete Timed Text Resource into the given string. Fails if the resource
          // is encrypted and AESDecContext is NULL (use the following method to retrieve the
          // raw ciphertet block).
          Result_t ReadTimedTextResource(std::string&, AESDecContext* = 0, HMACContext* = 0) const;

          // Reads the complete Timed Text Resource from the MXF file. If the optional AESEncContext
          // argument is present, the resource is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadTimedTextResource(FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Reads the timed-text resource having the given UUID from the MXF file. If the
          // optional AESEncContext argument is present, the resource is decrypted after
          // reading. If the MXF file is encrypted and the AESDecContext argument is NULL,
          // the frame buffer will contain the ciphertext frame data. If the HMACContext
          // argument is not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadAncillaryResource(const byte_t* uuid, FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Print debugging information to stream
          void     DumpHeaderMetadata(FILE* = 0) const;
          void     DumpIndex(FILE* = 0) const;
        };
    } // namespace TimedText

  //---------------------------------------------------------------------------------
  //
  namespace DCData
  {
    struct DCDataDescriptor
    {
      Rational EditRate;                 // Sample rate
      ui32_t   ContainerDuration;          // number of frames
      byte_t   AssetID[UUIDlen];           // The UUID for the DCData track
      byte_t   DataEssenceCoding[UUIDlen]; // The coding for the data carried
    };

    // Print DCDataDescriptor to std::ostream
    std::ostream& operator << (std::ostream& strm, const DCDataDescriptor& ddesc);
    // Print debugging information to stream (stderr default)
    void DCDataDescriptorDump(const DCDataDescriptor&, FILE* = 0);

    //
    class FrameBuffer : public ASDCP::FrameBuffer
        {
     public:
          FrameBuffer() {}
          FrameBuffer(ui32_t size) { Capacity(size); }
          virtual ~FrameBuffer() {}

          // Print debugging information to stream (stderr default)
          void Dump(FILE* = 0, ui32_t dump_bytes = 0) const;
        };

    // An object which opens and reads a DC Data file.  The file is expected
    // to contain exactly one complete frame of DC data essence as an unwrapped (raw)
    // byte stream.
    class BytestreamParser
        {
          class h__BytestreamParser;
          mem_ptr<h__BytestreamParser> m_Parser;
          ASDCP_NO_COPY_CONSTRUCT(BytestreamParser);

     public:
          BytestreamParser();
          virtual ~BytestreamParser();

          // Opens a file for reading, parses enough data to provide a complete
      // set of stream metadata for the MXFWriter below.
          // The frame buffer's PlaintextOffset parameter will be set to the first
          // byte of the data segment. Set this value to zero if you want
          // encrypted headers.
          Result_t OpenReadFrame(const std::string& filename, FrameBuffer&) const;

          // Fill a DCDataDescriptor struct with the values from the file's bytestream.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillDCDataDescriptor(DCDataDescriptor&) const;
        };

    // An object which reads a sequence of files containing DC Data.
    class SequenceParser
        {
          class h__SequenceParser;
          mem_ptr<h__SequenceParser> m_Parser;
          ASDCP_NO_COPY_CONSTRUCT(SequenceParser);

     public:
          SequenceParser();
          virtual ~SequenceParser();

          // Opens a directory for reading.  The directory is expected to contain one or
          // more files, each containing the bytestream for exactly one frame. The files
      // must be named such that the frames are in temporal order when sorted
          // alphabetically by filename.
          Result_t OpenRead(const std::string& filename) const;

          // Opens a file sequence for reading.  The sequence is expected to contain one or
          // more filenames, each naming a file containing the bytestream for exactly one
          // frame.
          Result_t OpenRead(const std::list<std::string>& file_list) const;

          // Fill a DCDataDescriptor struct with default values.
          // Returns RESULT_INIT if the directory is not open.
          Result_t FillDCDataDescriptor(DCDataDescriptor&) const;

          // Rewind the directory to the beginning.
          Result_t Reset() const;

          // Reads the next sequential frame in the directory and places it in the
          // frame buffer. Fails if the buffer is too small or the direcdtory
          // contains no more files.
          // The frame buffer's PlaintextOffset parameter will be set to the first
          // byte of the data segment. Set this value to zero if you want
          // encrypted headers.
          Result_t ReadFrame(FrameBuffer&) const;
        };

    //
    class MXFWriter
        {
          class h__Writer;
          mem_ptr<h__Writer> m_Writer;
          ASDCP_NO_COPY_CONSTRUCT(MXFWriter);

     public:
          MXFWriter();
          virtual ~MXFWriter();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for writing. The file must not exist. Returns error if
          // the operation cannot be completed or if nonsensical data is discovered
          // in the essence descriptor.
          Result_t OpenWrite(const std::string& filename, const WriterInfo&,
                             const DCDataDescriptor&, ui32_t HeaderSize = 16384);

          // Writes a frame of essence to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs.
          Result_t WriteFrame(const FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);

          // Closes the MXF file, writing the index and revised header.
          Result_t Finalize();
        };

    //
    class MXFReader
        {
          class h__Reader;
          mem_ptr<h__Reader> m_Reader;
          ASDCP_NO_COPY_CONSTRUCT(MXFReader);

     public:
          MXFReader();
          virtual ~MXFReader();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for reading. The file must exist. Returns error if the
          // operation cannot be completed.
          Result_t OpenRead(const std::string& filename) const;

          // Returns RESULT_INIT if the file is not open.
          Result_t Close() const;

          // Fill a DCDataDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillDCDataDescriptor(DCDataDescriptor&) const;

          // Fill a WriterInfo struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillWriterInfo(WriterInfo&) const;

          // Reads a frame of essence from the MXF file. If the optional AESEncContext
          // argument is present, the essence is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadFrame(ui32_t frame_number, FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Using the index table read from the footer partition, lookup the frame number
          // and return the offset into the file at which to read that frame of essence.
          // Returns RESULT_INIT if the file is not open, and RESULT_RANGE if the frame number is
          // out of range.
          Result_t LocateFrame(ui32_t FrameNum, Kumu::fpos_t& streamOffset, i8_t& temporalOffset, i8_t& keyFrameOffset) const;

          // Print debugging information to stream
          void     DumpHeaderMetadata(FILE* = 0) const;
          void     DumpIndex(FILE* = 0) const;
        };

  } // namespace DCData

  //---------------------------------------------------------------------------------
  //
  namespace ATMOS
  {
    struct AtmosDescriptor : public DCData::DCDataDescriptor
    {
      ui32_t FirstFrame;       // Frame number of the frame to align with the FFOA of the picture track
      ui16_t MaxChannelCount;  // Max number of channels in bitstream
      ui16_t MaxObjectCount;   // Max number of objects in bitstream
      byte_t AtmosID[UUIDlen]; // UUID of Atmos Project
      ui8_t  AtmosVersion;     // ATMOS Coder Version used to create bitstream
    };

    // Print AtmosDescriptor to std::ostream
    std::ostream& operator << (std::ostream& strm, const AtmosDescriptor& adesc);
    // Print debugging information to stream (stderr default)
    void AtmosDescriptorDump(const AtmosDescriptor&, FILE* = 0);
    // Determine if a file is a raw atmos file
    bool IsDolbyAtmos(const std::string& filename);

    //
    class MXFWriter
        {

      class h__Writer;
          mem_ptr<h__Writer> m_Writer;
          ASDCP_NO_COPY_CONSTRUCT(MXFWriter);

     public:
          MXFWriter();
          virtual ~MXFWriter();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for writing. The file must not exist. Returns error if
          // the operation cannot be completed or if nonsensical data is discovered
          // in the essence descriptor.
          Result_t OpenWrite(const std::string& filename, const WriterInfo&,
                             const AtmosDescriptor&, ui32_t HeaderSize = 16384);

          // Writes a frame of essence to the MXF file. If the optional AESEncContext
          // argument is present, the essence is encrypted prior to writing.
          // Fails if the file is not open, is finalized, or an operating system
          // error occurs.
      Result_t WriteFrame(const DCData::FrameBuffer&, AESEncContext* = 0, HMACContext* = 0);

          // Closes the MXF file, writing the index and revised header.
          Result_t Finalize();
        };

    //
    class MXFReader
        {
      class h__Reader;
          mem_ptr<h__Reader> m_Reader;
          ASDCP_NO_COPY_CONSTRUCT(MXFReader);

     public:
          MXFReader();
          virtual ~MXFReader();

          // Warning: direct manipulation of MXF structures can interfere
          // with the normal operation of the wrapper.  Caveat emptor!
          virtual MXF::OP1aHeader& OP1aHeader();
          virtual MXF::OPAtomIndexFooter& OPAtomIndexFooter();
          virtual MXF::RIP& RIP();

          // Open the file for reading. The file must exist. Returns error if the
          // operation cannot be completed.
          Result_t OpenRead(const std::string& filename) const;

          // Returns RESULT_INIT if the file is not open.
          Result_t Close() const;

          // Fill an AtmosDescriptor struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillAtmosDescriptor(AtmosDescriptor&) const;

          // Fill a WriterInfo struct with the values from the file's header.
          // Returns RESULT_INIT if the file is not open.
          Result_t FillWriterInfo(WriterInfo&) const;

          // Reads a frame of essence from the MXF file. If the optional AESEncContext
          // argument is present, the essence is decrypted after reading. If the MXF
          // file is encrypted and the AESDecContext argument is NULL, the frame buffer
          // will contain the ciphertext frame data. If the HMACContext argument is
          // not NULL, the HMAC will be calculated (if the file supports it).
          // Returns RESULT_INIT if the file is not open, failure if the frame number is
          // out of range, or if optional decrypt or HAMC operations fail.
          Result_t ReadFrame(ui32_t frame_number, DCData::FrameBuffer&, AESDecContext* = 0, HMACContext* = 0) const;

          // Using the index table read from the footer partition, lookup the frame number
          // and return the offset into the file at which to read that frame of essence.
          // Returns RESULT_INIT if the file is not open, and RESULT_RANGE if the frame number is
          // out of range.
          Result_t LocateFrame(ui32_t FrameNum, Kumu::fpos_t& streamOffset, i8_t& temporalOffset, i8_t& keyFrameOffset) const;

          // Print debugging information to stream
          void     DumpHeaderMetadata(FILE* = 0) const;
          void     DumpIndex(FILE* = 0) const;
        };

  } // namespace ATMOS



} // namespace ASDCP


#endif // _AS_DCP_H_

//
// end AS_DCP.h
//