4 The asdcplib library is a set of objects that offer
5 simplified access to files conforming to the sound and
6 picture track file formats developed by the SMPTE Working
9 This work was originally funded by Digital Cinema
10 Initiatives, LLC (DCI). Subsequent efforts have been funded
11 by Deluxe Laboratories, Doremi Labs, CineCert LLC, Avica
12 Technology and others.
14 **The asdcplib project was originally housed on SourceForge.
15 The project has moved to http://www.cinecert.com/asdcplib/
17 The project formerly depended upon the mxflib project. Because
18 of its focus on covering the whole of the MXF specifications,
19 mxflib is considerably larger and more complex that what I
20 require for this application. For this reason I have created
21 a dedicated MXF implementation that is now part of this
22 library. Special thanks to Matt Beard and Oliver Morgan for
23 their great work and support.
25 Thanks also to the members of the SMPTE DC28.20 packaging
26 ad-hoc group and the members of the MXF Interop Initiative
27 for their encouragement and support. Special thanks to
28 Jim Whittlesey and Howard Lukk at DCI for proposing and
29 supporting this project.
34 This library is intended (but of course not limited) for
35 use by developers of commercial D-Cinema products. It is
36 designed to be easily integrated into a wide variety of
37 development environments. Commercial users are strongly
38 urged to use static linking (at least where you use this
39 library) to prevent malicious in-field replacement of
40 critical system modules. This recommendation should be
41 considered wherever Open Source or Free software is being
42 used in conjunction with critical security parameters, such
43 as cryptographic keys.
45 The author strives mightily to provide an API that is completely
46 independent of operating system and other library dependencies,
47 and which allows selective replacement of some modules for
48 local needs. Specifically, the essence parsers and OpenSSL
49 crypto functions can be replaced by linking to alternative
50 implementations of the ASDCP:: objects which provide those
53 AS_DCP.h contains the entire API. You do not need to read
54 any of the other files, except maybe asdcp-test.cpp which
55 contains detailed usage examples of each of the API's
56 services. The KM_* files may be of interest for general
57 development support, but may be ignored if all you want
58 is simple AS-DCP support.
63 On more-or-less POSIX systems (OS X, Linux, and BSD), GNU make is
64 required to build asdcplib. The same configure script will also
65 build this package on Windows machines with Cygwin and
66 MinGW installed. For those Windows users who would prefer to build
67 this natively, an "nmake" build file and instructions can be found
68 in the win32 subdirectory.
70 OpenSSL is also required, version 0.9.8k is recommended. See
71 http://www.openssl.org/ for more information and download
74 Optional support for writing Timed Text Track Files is supported by
75 either Xerces-C or Expat. See http://xerces.apache.org/xerces-c/ or
76 http://expat.sourceforge.net/ for source and build instructions.
78 To configure and build, type './configure' followed by 'make'. There
79 are several test targets on the POSIX side, but you need to assemble
80 a set of test files to use them.
82 I have tested this build on win32, Linux, OpenBSD, and Darwin
83 platforms. Others may work as well.
90 asdcp-test - Writes, reads and verifies AS-DCP (MXF) track files.
92 kmfilegen - Writes and verifies large files using a platform-
93 independent format. Use it to test issues related to large files.
95 kmuuidgen, kmrandgen - generate UUID values and random numbers.
97 wavesplit - Splits a WAVE file into two or more output files. Used
98 to untangle incorrectly-paired DCDM sound files.
100 blackwave - Write a WAVE file full of zeros, Used to make filler
101 tracks (though you would be better off modifying asdcp-test if
102 this is a common use case).
107 Currently, the API documentation is mostly in AS_DCP.h. Read
108 that file for a detailed description of the library's capabilities.
109 Read asdcp-test.cpp for library usage examples. The command-line
110 utilities all respond to -h.
114 2009.11.06 - bug fixes, enhancements, v1.5.29
115 o Fixed a bug that could cause HMAC values to be incorrectly
116 stored in MXF files. Files created with versions of asdcplib
117 prior to this version may have incorrect HMAC values.
118 o Improved handing of XML files for MXF wrapping.
119 o Jpeg2000 codestream EditRate and SampleRate mismatches
120 now warns instead of returning an error.
121 o Improved error handling in Jpeg2000 sequence parsing routines.
122 o Added two methods to Kumu::Timestamp, AddSeconds(), to add (or subtract)
123 seconds to a time value, and GetSecondsSinceEpoch() to get the number of
124 seconds since the unix epoch.
125 o Added new option to asdcp-test, '-a', to specify a UUID when creating MXF files.
126 o Added support for specifying the intrinsic duration of MXF files containing
128 o Added new option to wavesplit, '-i', to display WAV file metadata.
131 2009.05.21 - bug fixes, v.1.4.24
132 o Fixed a bug that caused incorrect SubDescriptors UL values to be
133 written into interop format MXF track files. Note that this involved
134 a substantial reorganization of MXF internals. Please test thoroughly
135 in your application before using in production. Note that this is a
136 significant bug fix and track files created with 1.4.22 may be incompatible
139 2009.04.09 - SMPTE format fixes, enhancements and bug fixes, v.1.4.22
140 o asdcplib now uses GNU autotools on POSIX systems to configure
141 and build. See "./configure" for details. Note that two options,
142 --enable-freedist and --with-python are not enabled in the free
143 version of asdcplib and should not be used.
144 o Added build option (CONFIG_RANDOM_UUID) to enable mixed case UUID
145 generation when environment variable KM_USE_RANDOM_UUID is defined.
146 o Fixed a condition that could cause an error to occur when wrapping
147 SMPTE format timed text track files that do not define a starting
149 o Updated ULs for SMPTE format track files.
150 o SampleRate added to JP2K metadata
151 o Support for wrapping 96kHz WAV files added.
152 o Updated ULs for audio channel formats (ChannelFormat)
153 o Updated font subdescriptor MIME Types for TimedText Trackfiles.
154 o Changed time implementation to support dates beyond Jan 19th, 2038.
155 o Xerces-C XML parser support added.
156 o New build method for Windows (see win32/README.txt for details).
157 o Added new functionality in Kumu to recursively create and delete files
158 and directories, and get free disk space for a given volume path.
159 o Added a method to Kumu::Timestamp, AddMinutes(), to add (or subtract)
160 minutes to a time value.
161 o Improved how Kumu::Timestamp parses timestamps with offsets.
162 o Fixed a bug that caused incorrect HMAC values to be calculated.
165 2008.02.16 - SMPTE format fixes, bug fixes v.1.3.18
166 o Added correct SMPTE UL for StereoscopicPictureSubDescriptor.
167 o Exposed JP2K metadata parser as ParseMetadataIntoDesc().
168 o Added simple stereoscopic framebuffer to support paired ReadFrame()
169 and WriteFrame() methods (allows simpler integration with other
171 o Improved detection of JPEG Interop stereoscopic files.
172 o Win32 build fixes (Thanks to Mike Crowe at DTS).
173 o Added the WITH_MD macro to the makefile. Set this value to one
174 to build Win32 with /MD[d] instead of /MT[d].
175 o The Generic Container UL has been added to the EssenceContainers
176 set in the header partition pack for encrypted files. It has always
177 been there in plaintext files.
178 - Below this point the changes are internal and should not affect you
179 unless you use Kumu directly.
180 o Major refactoring of KM_log.[h|cpp].
181 o Fixed buffer re-sizing issue in Kumu::ByteString.
182 o Replaced type IdentifierList with ArchivableList.
183 o Added COPYING file to the release bundle.
186 2007.12.13 - Bug fixes v.1.2.17
187 o Changed Result_t implementation to use int instead of long, which
188 was causing trouble on some 64 bit platforms.
189 o Fixed EKLV HMAC. NOTE: Breaks backward compatibility with older
190 Interop files. To validate these files, use asdcplib-1.1.14. This
191 should not cause too much trouble since files with broken and
192 non-broken HMAC have been in the wild for years without issue.
193 o Fixed HMAC sequence numbering in encrypted stereoscopic files.
194 o Finished stereoscopic test targets in the makefile.
195 o Fixed the win32 build, now expects VS2005 compiler by default,
196 use WITH_VC6=1 top get VC6 flags.
197 o Stereoscopic and Timed Text modes now have SMPTE UL values.
198 NOTE: SMPTE 429-5 and 429-10 are not yet published. It is possible
199 that these UL values may change before publication. Please use
200 caution when using these features for production work.
201 o Changed a bunch of symbol names in the 429-5 implementation to
202 better match the spec.
203 o Added -U option to asdcp-test to dump the UL library to stdout.
204 o Fixed erroneous placement of the PictureEssenceCoding UL in JP2K
205 files (Interop and SMPTE modes).
208 2007.10.22 - Timed Text, Stereoscopic Picture and Bug fixes v.1.2.16
209 o Significant API changes have been made. Please read all entries
210 in this changelog to be sure you understand the changes. Also
211 note that some changes have been made to LS_MXF_SMPTE files that
212 are incompatible with earlier releases (e.g., EKLV HMAC). If
213 you are looking for a stable interop release, use v.1.1.14.
214 o Fixed RFC 2104 HMAC implementation for LS_MXF_SMPTE only. The
215 broken implementation has been maintained for Interop mode.
216 o Added support for draft SMPTE 429-5 Timed Text Track File. This
217 is still waiting for official SMPTE ULs, so do not use it for
218 shipping products. An XML parser is needed to create a Timed
219 Text Track File; Expat is now an optional part of the build.
220 Make with WITH_XML_PARSER=1 to link with Expat. If you do not
221 link with expat, you will get an error when using the TimedText::
222 DCSubtitleParser class. See also S429-5-cgi.cpp for an example
223 that shows how to serve plaintext MXF file elements directly via
225 o Added support for draft SMPTE 429-10 Stereoscopic Picture Track
226 File, including the JPEG Interop version. This is still waiting
227 for official SMPTE ULs, so do not use it with LS_MXF_SMPTE for
229 o Refactored the following files as a side-effect of the above
230 work: AS_DCP_JP2K.cpp AS_DCP_MPEG2.cpp AS_DCP_PCM.cpp
231 AS_DCP_MXF.cpp AS_DCP_internal.h MXF.[h|cpp] MXFTypes.[h|cpp]
232 Metadata.[h|cpp] h__Reader.cpp h__Writer.cpp klvwalk.cpp.
233 WARNING: While significant effort has been extended to make sure
234 that these changes do not affect existing stable file support,
235 users are cautioned to test this release thouroughly.
236 o Added a large set of filesystem path manglers to KM_fileio.h. See
237 path-test.cpp for example usage. The path manglers have not yet
238 been tested on win32 platforms (they are currently used only by
239 the Timed Text module.
240 o The PathIsFile(), PathIsDirectory() and FileSize() subroutines
241 have been modified to accept const std::string& instead of
243 o Added namespace and parsing support (Expat) to Kumu::XMLElement
244 (currently used only for Timed Text support). Also added some
246 o Altered MXF::UTF16String to use mbtowc() and wctomb().
249 2007.03.31 - Bug fixes v.1.1.14
250 o Fixed KeyFrameOffset value in MPEG wrapping to have negative
251 value. This is probably not yet complete for handling all
252 types of GOPs. Please send chunks of MPEG-2 VES that you
253 find which break this. Thanks to Doremi.
254 ** no other file format changes in this release **
255 o Fixed error in RIP interpretation when reading arbitrary (i.e.,
257 o Fixed a memory leak in ASDCP::MXF::OPAtomHeader when used
258 in read mode. Thanks to Mahesh Bajaj for pointing out this
259 bug and the one above.
260 o Removed asserts from KM_fileio, replaced with RESULT_WRITEFAIL
261 return value statements.
262 o Added -s and -p to the makefile install target.
263 o Altered ByteString behavior to use target Length() in copy
264 operations (instead of Capacity()).
265 o Added new Set() method to ByteString.
266 o Fixed a bug in ByteString::Unarchive() that caused the operation
267 to fail when the buffer was smaller than the read (i.e., when
268 Capacity() was called).
269 o Added IdentifierList class to KM_util.h.
270 o Changed some Error() messages to Debug() in Wav.cpp
271 o Revived jp2k-test.cpp and asdcp-mem-test.cpp (they both had
275 2007.02.15 - Bug fixes v1.1.13
276 o Removed 'VDescObj->SampleRate.Numerator = VDesc.FrameRate;'
277 from MPEG2_VDesc_to_MD() in AS_DCP_MPEG2.cpp, was line 76.
278 o Added KM_TEST_NULL_STR_L() and KM_TEST_NULL_L() macros to
279 KM_log.h. These versions log the location of the null value.
280 Macros are now used in any module that includes KM_log.h.
281 o MPEG2 VES with run of zero values at the head is now OK.
282 o Increased VESHeaderBufSize to 16K.
283 o Added makefile support for local OpenSSL in ../openssl, if
285 o The Kumu::PathIs*() functions now return false if a null or
286 empty string is given (used to be an assert).
287 o Cleaned up the install target in the makefile.
288 o Fixed SMPTE 429-6 HMAC -- FIPS 186-2 implementation was
289 laughably incorrect. Thanks to Doremi for pointing this out.
290 o Removed default parameter to HMACContext::InitKey().
291 o Cleaned up messages and CLI arg handling in asdcp-test.
294 2006.11.19 - Mo better stuff v1.1.12
295 o Changed read-only Result_t accessor methods to const.
296 o Added Base64 (-B) option to kmrandgen.
297 o Removed 16-bit alignment restriction from kmrandgen.
298 o Improved WAV file extraction speed (Thanks to Jim Radford
299 for pointing this out).
300 o Added single-channel split for WAV extraction (asdcp-test -1).
301 o Fixed remainder bug in h__RNG::fill_rand().
304 2006.11.03 - Bug fixes v1.1.11
305 o Increased index table entry list size to 5000.
306 o Added length checking to TLV writer (returns error if TLV
307 payload exceeds 64kB).
308 o Fixed partition header and RIP errors related to 2-partition
309 files (MXF Interop mode).
310 o Added -t option to asdcp-test (SHA-1 digest with Base64 output
312 o Fixed Sub Descriptor reference bug (Thanks to Denis Leconte
313 for dogged determination).
314 o Added directory-of-wav detection to RawEssenceType()
315 o Modified MXF::Partition::AddChildObject() to only generate
316 a UUID if the InstanceID is unset.
317 o Added ComponentMaxRef & ComponentMinRef to RGBAEssenceDescriptor.
319 o Added detection of 2K/4K jp2c, writing correct 4K metadata.
322 2006.10.05 - Bug fixes v1.1.10
323 o Changed RM_RELEASE to RL_RELEASE in MXFTypes.h.
324 o Changed the MXF writer to use RL_RELEASE (was RL_DEVELOPMENT).
325 o Really fixed source reference chain.
326 o Updated JP2K file package label.
327 o Changed location of JPEG2000PictureSubDescriptor in the
328 header (was erroneously before Preface).
329 o Altered LS_MXF_INTEROP to produce 2-partition files.
332 2006.09.25 - Bug fixes v1.1.9
333 o Fixed SourcePackageID value. All files will be 'original',
334 i.e. SourcePackageID will be all zeros. Let me know if you
335 want to set SourcePackageID.
336 o Fixed compiler warnings on some Linux platforms
337 o Fixed the build so that BUILD_DIR is no longer created
339 o Added duration detection to the raw essence parsers. The
340 MPEG parser uses a nasty approximation so don't use it
341 without paying close attention to the result.
342 o Modified PCMParserList to make it more useful as a base
344 o Fixed bugs and re-organized command-line help in asdcp-test
346 o Fixed two-partition file reads.
347 o Fixed Win32 PRNG initialization.
348 o Renamed asdcp-lf-test as kmfilegen.
349 o Added kmrandgen and kmuuidgen.
350 o Added string retrieval mechanism to Result_t.
351 o Refactored Kumu::Identifier and its sub-classes.
352 o Altered Kumu::PathIsFile to return true when the path
353 is a symbolic link (unix only).
354 o Altered Kumu::FileWriter::OpenWrite to use file creation
355 mode 0664 (was 0644) (unix only).
356 o Added Kumu::WriteStringIntoFile() subroutine.
359 2006.04.05 - Bug fixes and new stuff v1.1.7
360 o Fixed a bug in the MPEG parser that caused it to fail when
361 handling start codes spanning buffer boundaries
362 o Added wavesplit and blackwave utility programs
363 o Added support for revised SMPTE HMAC key derivation when
365 o Refactored platform compatibility and general utilities
366 into a new sub-library "Kumu". There are no new build
367 steps or dependencies, but some important things have
369 + Result_t is no longer an enum, it is now a class.
370 Library result codes are now declared as const objects
373 const Kumu::Result_t RESULT_FORMAT (-101, "The file...");
375 The macros ASDCP_SUCCESS and ASDCP_FAILURE still work
376 the same way thanks to an operator overload for type long.
377 See KM_error.h for more information.
378 + The logging interface has been moved out of AS_DCP.h
380 o Some of the command line utilities that were using headers
381 other than AS_DCP.h have been changed to use the Kumu
382 equivalents. If you have code based on those utilities, you
383 will have to update by hand.
384 o Added new types to the EssenceType_t enum.
385 o The guard macro for Win32 code has changed from WIN32 to
389 2006.03.2x - new stuff
390 o Proper handling of stream-id byte of essence UL values
391 o writes 3-partition files, reads 2-part or 3-part
394 2006.03.16 - bug fixes plus
395 o Removed SMPTE_LABELS compile-time option. The reader will now
396 silently accept either SMPTE or MXF Interop labels, the writer
397 can be instructed which to use at runtime. Default is Interop.
398 o Added an AIFF reader. Support is preliminary, it works with the
399 AIFF files I have on hand.
400 o More code refactoring. More to come.
403 2006.03.09 - full read-write
404 o Removed ASDCP_WITHOUT_OPENSSL compile-time option.
405 o Full read/write now working on new MXF library
408 2005.00.00 - A New Hope
409 o The temporary mxf-lite has been removed. MXF files are now
410 managed via the objects in KLV.h, MXFTypes.h MXF.h and
411 Metadata.h. This release does not support writing MXF files.
412 o Fixed a header interpretation error in the Wav parser.
415 2005.00.00 - The Reformation
416 o Removed mxflib as a dependency by forking the necessary
417 functions and placing them in the mxf-lite subdirectory.
418 Please note that the very heavy modifications done here
419 render all comparisson to mxflib code a substantial task.
420 All errors are now mine and users are warned not to bug
421 Oliver or Matt for help with this code. The version of
422 mxflib at the time of the fork was: 0.5.1.3.
425 2005.06.03 - bug fixes v0.10.18
426 o Updated UL batch to include GC UL.
429 2005.05.27 - bug fixes v0.10.17
430 o Un-did essence container and compression descriptor changes.
431 The default build reflects MXF Interop decisions as of 26 May.
432 o Added note about build versions to README (see above).
433 o Added warnings to SMPTE_LABELS builds.
434 o Fixed JP2K essence container label.
437 2005.05.02 - bug fixes v0.10.16
438 o Reorganized internal files, added file reader object, added OS
439 portability header, removed and renamed some files. If you have a
440 patch against previous versions of the source, you should check
442 o Added RGBA attributes to JP2K descriptor.
443 o Changed interface to CodestreamParser.
444 o Added JP2K parser implementation. It is parsing each frame but is
445 not yet being used to populate the descriptor.
446 o Added 48fps option for `asdcp-test -p`.
447 o Added picture rate constants to AS_DCP.h (23.976, 24, 48).
448 o Added sample rate constant to AS_DCP.h (48k).
449 o Changed asdcp-test to encrypt picture headers by default
450 (plaintext offset will be 0), added -E option to allow
454 2005.04.28 - bug fixes v0.9.15
455 o The XML descriptors for the crypto DMS have moved in mxflib to
456 the file DMS_Crypto.xml (they were in DMS_DCPENC.xml). Older
457 installations should update the file from mxflib.
458 o Added Close() and Seek() to ~MyFileWriter(), cleaned up headers
459 o Added UUID generator output mode (-u).
460 o Added -S option to extract PCM essence into stereo wav files
461 o Added more UL testing and conformance checking.
462 o Added macro SMPTE_LABELS which causes the library to be built
463 with SMPTE (as opposed to MXF Interop) labels. This is not
464 set by default, and currently only affects the PCM container
465 label and encrypted element label.
466 o Cleaned up the GNUmakefile test targets, the source files
467 are now named with the TEST_FILE_PREFIX macro.
468 o enabled 23.976-framed PCM (2002 samples per frame)
469 o The size of the asdcp-test frame buffer for picture essence
470 may now be set from the command line (-b). The default is 4MB.
471 o h__Reader::ReadEKLVPacket() now tests the UL (duh) and switches
472 on the value, allowing plaintext and ciphertext frames to
473 be mixed in the file.
474 o Fixed error in UUID generator format.
475 o JP2K files now use the GenericPictureDescriptor to store
476 ContainerDuration and SampleRate. SampleRate is mapped
477 to EditRate in the PictureDescriptor struct. This fixes
478 the second caveat from the 0.8.13 release.
479 o Fxed bug in PCMParserList that was miscalculating the extent
480 of a PCM sample. This bug did not affect API users, it was
481 only present in asdcp-test.
482 o Fixed EditRate on PCM files (was showing sample rate)
483 o Fixed Encrypted Essence Container UL
484 o Fixed BlockAlign value for PCM essence
486 - The following changes were provided by Jeff Loewenguth
488 o Moved the DMS CryptographicFramework entry from the material
489 package to the source package
490 o Fixed erroneous Source Essence Container Label value
491 o Fixed broken sort of JP2K frames in JP2K parser
492 o Added FindFrameGOPStart() method to the MPEG2 MXFReader
493 o Added missing length values for EKLV packets without HMAC
494 o -x with JP2K essence writes to files with 6 digit names
496 o The Key ID may now be specified as an argument to asdcp-test
500 2004.12.30 - bug fixes + wav files v0.8.14
501 o Added WAV file write to asdcp-test (uses mxflib::waveheader_t).
502 o Three-partition files reading properly. adscplib still writes
504 o Changes in the mxflib WAV essence parser API had broken
505 asdcplib's ability to read essence from a WAV file. I have
506 fixed this bug, but at the expense of breaking compatibility
507 with older versions of mxflib. Beware!
508 o Removed redundant (but working) bin-text-bin conversions.
511 2004.12.23 - JPEG 2000 support v0.8.13
512 o Reads/writes JPEG 2000 essence in plaintext and ciphertext
513 with the following caveats:
514 - The Picture Essence Descriptor is empty.
515 - Because there is no essence descriptor, the reader code
516 in asdcp-test has no idea how many frames are in the file
517 and ends with an out-of-bounds frame error. This error
518 is being suppressed in asdcp-test for the current release.
519 o Still broken when reading three-partition files.
522 2004.10.22 - fixes and UL updates v0.7.11
523 WARNING: COMPATIBILITY BREAKPOINT
524 Files created with this and future versions of this library are
525 not compatible with previous versions of this library. As you
526 might suspect, files created with previous versions of this
527 library are not compatible with this and future versions.
529 o h__Reader will now open a three-partitition file (untested)
530 o Moved DMS from Material partition to File partition
531 o Added length fields to appropriate places in EKLV packet
534 2004.10.22 - fixes and UL updates v0.7.10
535 o fixed frame buffer handling of externally allocated buffer,
536 created unit test (asdcp-mem-test)
537 o added operator==() and operator!=() to Rational type
538 o fixed some type-related compiler warnings
539 o asdcp-test -p now works on unwrap
540 o updated some ULs to match documentation (thanks to Arun
542 o canonicalized line endings
545 2004.07.02 - full plaintext + ciphertext read/write v0.6.9
546 o HMAC, plaintext offest and raw ciphertext read supported
547 o back to proper CBR index
548 o MPEG temporal offset working
551 2004.07.01 - plaintext + ciphertext read/write v0.5.8
552 o encryption of MPEG and PCM essence supported with the
555 - no plaintext offest support
556 - no raw ciphertext read support
557 o moved to reflecting the whole KLV triplet in the CBR
558 index (now incompatible with mxflib, still searching
559 for info about what's "right")
560 o awaitng the following fixes/features:
561 - retrieve Temporal Offset from index in MPEG2::Reader
562 - test for correct ULs when reading frame triplets
563 - fix header metadata items for encrypted files
565 - plaintext offest support
566 - raw ciphertext read support
569 2004.06.14 - plaintext read/write w/key generator v0.4.5
570 o Project now uses OpenSSL (tested with 0.9.7d on win32, Linux, Darwin)
571 Use `make ASDCP_WITHOUT_OPENSSL=1` to make plaintext-only version
572 o Accepts interior I frames when parsing MPEG2 VES
573 o Improved error reporting on format errors
574 o Added support for encryption to asdcp-test
575 o Added RNG for asdcp-test (non-production use only, see notes in FortunaRNG.h)
576 o Implemented CBC encrypt, decrypt module
577 o Added partial TemporalOffset retrieval from MPEG2 parser
578 o Fixed win32 binmode bug
581 2004.05.12 - plaintext read/write v0.3.4
582 o Full read/write of plaintext MPEG-2 VES and WAV files
583 (does not yet support mux from or demux to 2 channel pairs)
584 o Builds with autoconf-based mxflib
585 o Added ASDCP_ prefix to macros
586 o Updated documentation, fixed documentation errors
587 o Simplified API for MXF writer setup
588 o Decoupled essence parsers from MXF writers
589 o added raw ciphertext support to FrameBuffer
590 o Cleaned up Get/Set naming confusion
591 o Added missing const qualifiers
594 2004.04.27 - preview release v0.2.1
595 o hasty release for quick review
596 o this release may not build with mxflib using autoconf.
597 o writes plaintext AS-DCP MPEG2 essence files
598 o tested under win32 and linux. FreeBSD and Darwin do not work
601 2004.02.04 - First release (v0.1.1):
602 o asdcp-test is mostly complete. It should correctly provide
603 access to the read and info capabilities of the library.
604 o The MPEG2 reader is functional but not fully tested.
605 o Some file format integrity tests remain to be coded.
606 o The PCM reader is mostly complete, I am having difficulty
607 getting a suitable test file from mxfwrap.
608 o The makefile creates a static library module. The API
609 will cleanly support a DSO (or DLL). Let me know if DSO
610 support is important to you.
611 o Nothing is thread safe. Thread safety was not a requirement
612 in the initial project definition. Thread safety may be added
613 above the mxflib/klvlib level. Let me know if it is important
615 o The files xmldict.xml and types.xml must be in the current
616 directory when the program is run. The files are supplied
617 with mxflib. Runtime location of the files is not currently
618 a project goal. Comments on how best to handle this situation
619 would be appreciated. See AS_DCP.cpp at init_mxf_types()
620 for a more detailed discussion.