/*
-Copyright (c) 2003-2006, John Hurst
+Copyright (c) 2003-2010, John Hurst
All rights reserved.
Redistribution and use in source and binary forms, with or without
\version $Id$
\brief AS-DCP library, public interface
-The asdcplib library is a set of wrapper objects that offer simplified
-access to files conforming to the file formats proposed by the SMPTE
-D-Cinema packaging working group DC28.20. The file format, labeled
-AS-DCP, is described in series of separate documents which include but
-may not be limited to:
-
- o AS-DCP Track File Specification
- o AS-DCP Track File Essence Encryption Specification
- o AS-DCP Operational Constraints Specification
+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 series of separate documents which include but may not
+be be limited to:
+
+ o SMPTE 429-2-2009 DCP Operational Constraints
+ o SMPTE 429-3-2006 Track File Specification
+ o SMPTE 429-4-2006 JPEG 2000 for D-Cinema
+ o SMPTE 429-5-2009 Timed Text Track File
+ o SMPTE 429-6-2006 Essence Encryption Specification
+ o SMPTE 429-10-2008 Stereoscopic Image Track File
o SMPTE 330M - UMID
o SMPTE 336M - KLV
o SMPTE 377M - MXF
o SMPTE 390M - OP-Atom
o SMPTE 379M - Generic Container
o SMPTE 381M - MPEG2 picture
- o SMPTE XXXM - JPEG 2000 picture
+ o SMPTE 422M - JPEG 2000 picture
o SMPTE 382M - WAV/PCM sound
o IETF RFC 2104 - HMAC/SHA1
o NIST FIPS 197 - AES (Rijndael)
+ 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 a plaintext MPEG2 Video Elementary Stream to a plaintext ASDCP file
- o Write a plaintext MPEG2 Video Elementary Stream to a ciphertext ASDCP file
- o Read a plaintext MPEG2 Video Elementary Stream from a plaintext ASDCP file
- o Read a plaintext MPEG2 Video Elementary Stream from a ciphertext ASDCP file
- o Read a ciphertext MPEG2 Video Elementary Stream from a ciphertext ASDCP file
- o Write one or more plaintext JPEG 2000 codestreams to a plaintext ASDCP file
- o Write one or more plaintext JPEG 2000 codestreams to a ciphertext ASDCP file
- o Read one or more plaintext JPEG 2000 codestreams from a plaintext ASDCP file
- o Read one or more plaintext JPEG 2000 codestreams from a ciphertext ASDCP file
- o Read one or more ciphertext JPEG 2000 codestreams from a ciphertext ASDCP file
- o Write one or more plaintext PCM audio streams to a plaintext ASDCP file
- o Write one or more plaintext PCM audio streams to a ciphertext ASDCP file
- o Read one or more plaintext PCM audio streams from a plaintext ASDCP file
- o Read one or more plaintext PCM audio streams from a ciphertext ASDCP file
- o Read one or more ciphertext PCM audio streams from a ciphertext ASDCP file
- o Read header metadata from an ASDCP file
-
-This project depends upon the following library:
- - OpenSSL http://www.openssl.org/
+ o Write essence to 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
+
+ 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
+ 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 429-5-2009.
*/
#ifndef _AS_DCP_H_
#include <stdio.h>
#include <stdarg.h>
#include <math.h>
-#include <iostream>
+#include <iosfwd>
#include <string>
+#include <cstring>
+#include <list>
//--------------------------------------------------------------------------------
// common integer types
// All library components are defined in the namespace ASDCP
//
namespace ASDCP {
- // The version number consists of three segments: major, API minor, and
- // implementation minor. Whenever a change is made to AS_DCP.h, the API minor
- // version will increment. Changes made to the internal implementation will
- // result in the incrementing of the implementation minor version.
-
- // For example, if asdcplib version 1.0.0 were modified to accomodate changes
- // in file format, and if no changes were made to AS_DCP.h, the new version would be
- // 1.0.1. If changes were also required in AS_DCP.h, the new version would be 1.1.1.
- const ui32_t VERSION_MAJOR = 1;
- const ui32_t VERSION_APIMINOR = 1;
- const ui32_t VERSION_IMPMINOR = 12;
+ //
+ // The version number declaration and explanation have moved to ../configure.ac
const char* Version();
// UUIDs are passed around as strings of UUIDlen bytes
const Kumu::Result_t RESULT_CRYPT_INIT (-111, "Error initializing block cipher context.");
const Kumu::Result_t RESULT_EMPTY_FB (-112, "Empty frame buffer.");
const Kumu::Result_t RESULT_KLV_CODING (-113, "KLV coding error.");
+ const Kumu::Result_t RESULT_SPHASE (-114, "Stereoscopic phase mismatch.");
+ const Kumu::Result_t RESULT_SFORMAT (-115, "Rate mismatch, file may contain stereoscopic essence.");
//---------------------------------------------------------------------------------
// file identification
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)
};
// Determine the type of essence contained in the given MXF file. RESULT_OK
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;
+ }
};
// common edit rates, use these instead of hard coded constants
const Rational EditRate_24(24,1);
- const Rational EditRate_23_98(24000,1001);
+ const Rational EditRate_23_98(24000,1001); // Not a DCI-compliant value!
const Rational EditRate_48(48,1);
const Rational SampleRate_48k(48000,1);
+ const Rational SampleRate_96k(96000,1);
+
+ // Additional frame rates, see ST 428-11
+ // These rates are new and not supported by all systems. Do not assume that
+ // a package made using on of these rates will work just anywhere!
+ const Rational EditRate_25(25,1);
+ const Rational EditRate_30(30,1);
+ const Rational EditRate_50(50,1);
+ const Rational EditRate_60(60,1);
// Non-reference counting container for internal member objects.
// Please do not use this class for any other purpose.
// 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
- // and SMPTE. The two differ only in the values of two labels:
+ // (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
//
- // OP Atom / Interop : 06 0e 2b 34 04 01 01 01 0d 01 02 01 10 00 00 00
- // OP Atom / SMPTE : 06 0e 2b 34 04 01 01 02 0d 01 02 01 10 00 00 00
- // and
- // EKLV Packet / Interop : 06 0e 2b 34 02 04 01 07 0d 01 03 01 02 7e 01 00
- // EKLV Packet / 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,
}
};
+ // 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);
// 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 = LS_MXF_INTEROP);
+ Result_t InitKey(const byte_t* key, LabelSet_t);
// Reset internal state, allows repeated cycles of Update -> Finalize
void Reset();
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);
};
} // 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 with optional HI/VI
+ };
+
struct AudioDescriptor
{
- Rational SampleRate; // rate of frame wrapping
+ Rational EditRate; // rate of frame wrapping
Rational AudioSamplingRate; // rate of audio sample
ui32_t Locked; //
ui32_t ChannelCount; // number of 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 number of samples per frame of data described by ADesc
inline ui32_t CalcSamplesPerFrame(const AudioDescriptor& ADesc)
{
- double tmpd = ADesc.AudioSamplingRate.Quotient() / ADesc.SampleRate.Quotient();
+ double tmpd = ADesc.AudioSamplingRate.Quotient() / ADesc.EditRate.Quotient();
return (ui32_t)ceil(tmpd);
}
};
} // namespace PCM
+ //---------------------------------------------------------------------------------
//
namespace JP2K
{
const ui32_t MaxComponents = 3;
- const ui32_t DefaultCodingDataLength = 64;
+ 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 ImageComponent
+ struct QuantizationDefault_t // ISO 15444-1 Annex A.6.4
{
- byte_t Ssize;
- byte_t XRsize;
- byte_t YRsize;
+ ui8_t Sqcd;
+ ui8_t SPqcd[MaxDefaults];
+ ui8_t SPqcdLength;
};
+#pragma pack()
struct PictureDescriptor
{
ui32_t XTOsize;
ui32_t YTOsize;
ui16_t Csize;
- ImageComponent ImageComponents[MaxComponents];
- byte_t CodingStyle[DefaultCodingDataLength];
- ui32_t CodingStyleLength;
- byte_t QuantDefault[DefaultCodingDataLength];
- ui32_t QuantDefaultLength;
+ 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);
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
{
// mismatch is detected.
Result_t OpenRead(const char* 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;
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();
+
+ // 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 char* 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();
+
+ // Open the file for reading. The file must exist. Returns error if the
+ // operation cannot be completed.
+ Result_t OpenRead(const char* 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;
+
+ // 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;
+ };
+
+ //
+ class IResourceResolver
+ {
+ public:
+ virtual ~IResourceResolver() {}
+ virtual Result_t ResolveRID(const byte_t* uuid, FrameBuffer&) const = 0; // return data for RID
+ };
+
+ //
+ 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 char* 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 char* filename = 0) 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();
+
+ // 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 char* 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();
+
+ // Open the file for reading. The file must exist. Returns error if the
+ // operation cannot be completed.
+ Result_t OpenRead(const char* 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 ASDCP
projects / asdcplib.git / blobdiff