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Complete Version history / Release notes / Changelog / What's New for FLAC Encoder


FLAC 1.4.1 (22-Sep-2022)
This release only has a few changes. It was triggered by a problem in the 1.4.0 tarball: man pages were empty and api documentation missing

CMake fixes (Tomasz Kłoczko)
Add checks that man pages and api docs end up in tarball
Enable installation of prebuilt man pages and api docs
Fix compiler warnings (Johannes Kauffmann, Ozkan Sezer)
Fix format specifier (manxorist)
Enable building on Universal Windows Platform (Steve Lhomme)
Fix versioning from git


FLAC 1.4.0
As there have been changes to the library interfaces, the libFLAC version number is incremented to 12, the libFLAC++ version number is incremented to 10. As some changes were breaking, the version age numbers (see libtool versioning) have been reset to 0. For more details on the changes to the API, see the porting guide.

The XMMS plugin and ‘common’ plugin code (used only by the XMMS plugin) are deprecated, they will be removed in a future release.

General:
It is now possible to limit the minimum bitrate of a FLAC file generated by libFLAC and with the flac tool to 1 bit/sample. This function can be used to aid live streaming, for example for internet radio
Encoding files with sample rates up to 1’048’575Hz is now possible. (Con Kolivas)
Compression of preset -3 through -8 was slightly improved at the cost of a small decrease in encoding speed by increasing the precision with which autocorrelation was calculated (Martijn van Beurden)
Encoding speed of preset -0, -1 and -2 was slightly improved
Compression of presets -1 and -4 was slighly improved on certain material by changing the adaptive mid-side heuristics
Speedups specifically targeting 64-bit ARMv8 devices using NEON were integrated (Ronen Gvili, Martijn van Beurden)
Speedups for x86_64 CPUs having the FMA instruction set extention are added
Encoding and decoding of 32-bit PCM is now possible
(Ogg) FLAC format:
The FLAC format document is being rewritten by the IETF CELLAR working group. The latest draft can be found on https://datatracker.ietf.org/doc/draft-ietf-cellar-flac/
The FLAC format document specifies no bounds for the residual. In other to match current decoder implementations, it is proposed to bound the residual to the range provided by a 32-bit int signed two’s complement. This limit must be checked by FLAC encoders as to keep FLAC decoders free from the complexity of being to decode a residual exceeding a 32-bit int.
There is now a set of files available to test whether a FLAC decoder implements the format correctly. This FLAC decoder testbench can be found at https://github.com/ietf-wg-cellar/flac-test-files. Also, results of testing hard- and software can be found here at https://wiki.hydrogenaud.io/index.php?title=FLAC_decoder_testbench.
flac:
The option –limit-min-bitrate was added to aid streaming, see github #264
The option –keep-foreign-metadata-if-present is added. This option works the same as –keep-foreign-metadata, but does return a warning instead of an error if no foreign metadata was found to store or restore
The warning returned by the foreign metadata handling is now clearer in case a user tries to restore foreign metadata of the wrong type, for example decoding a FLAC file containing AIFF foreign metadata to a WAV file
A problem when using the analyse function causing the first frame to have a wrong size and offset was fixed
Fix bug where channel mask of a file is unintentionally reused when several files are processed with one command
The order of compression-related commands is no longer important, i.e. -8ep gives the same result as -ep8. Previously, a compression level (like -8) would override a more specific setting (like -e or -p). This is no longer the case
flac now checks the block-align property of WAV files to ensure non-standard WAV files (for which flac has no handling) are not mangled
metaflac:
(none)
build system:
MSVC and Makefile.lite build system files have been removed. Building with MSVC (Visual Studio) can be done by using CMake
Various CMake improvements, especially for creating MSVC build files (Martijn van Beurden, martinRenou, CookiePLMonster, David Callu, Tyler Dunn, Cameron Cawley)
Various fixes for MinGW (Martijn van Beurden, Cameron Cawley)
Removed obsolete autotools macro’s to silence warnings
Fixes for FreeBSD PowerPC (pkubaj)
Fixed some compiler warnings (Martijn van Beurden, Tyler Dunn)
Fix building with uclibc (Fabrice Fontaine)
testing/validation:
Addition of new encoder fuzzer, adding fuzzing for 8, 24 and 32-bit inputs
Addition of new decoder fuzzer, adding coverage of seeking code
Addition of metadata fuzzer, adding coverage of metadata APIs
Various improvements to fuzzers to improve code coverage, fuzzing speed and stability
Many changes to test suite to improve cross-platform compatibility (Rosen Penev)
Windows CI now also builds the whole test suite
Clang-format file added (Rosen Penev)
Add warning on using v141_xp platform toolset with /MT (Martijn van Beurden, Paul Sanders)
libraries:
Various seeking fixes (Martijn van Beurden, Robert Kausch)
Various bugs fixed found by fuzzing
On decoding, it is now checked whether residuals can be contained by a 32-bit int, preventing integer overflow
Add check that samples supplied to libFLAC actually fall within the bps set
Add checks when parsing metadata blocks to not allocate excessive amounts of memory and not overread
Undocumented Windows-only utf8 functions are no longer exported to the DLL interface
Removed all assembler and intrinsics code from the decoder to improve fuzzing, as they provided only a small speed benefit
The bitwriter buffer is limited in size to 2^24 bytes, so it cannot write excessively large files. This is a backup in case another bug in this area creeps (back) in.
The metadata iterations should now never return a vorbiscomment entry with NULL as an entry, now always at least an empty string is returned
documentation:
Removed html documentation and generate man pages from markdown
Interface changes:
libFLAC:
Addition of FLAC__stream_encoder_set_limit_min_bitrate() and FLAC__stream_encoder_get_limit_min_bitrate(), see github #264
get_client_data_from_decoder is renamed FLAC__get_decoder_client_data(), see github #124
All API functions taking a filename as an argument now take UTF-8 filenames on Windows, and no longer accept filenames using the current codepage
FLAC__Frame struct has changed: warmup samples are now stored in FLAC__int64 instead of FLAC__int32 types, and verbatim samples can now be stored in either FLAC__int32 or FLAC__int64 depending on whether samples fix the former or latter
The FLAC__StreamMetadata struct now has a tag, so it can be forward declared
libFLAC++:
Addition of ::set_limit_min_bitrate() and ::get_limit_min_bitrate(), see github #264
All API functions taking a filename as an argument now take UTF-8 filenames on Windows, and no longer accept filenames using the current codepage
The ::FLAC__Frame struct has changed, see the libFLAC interface change.


FLAC 1.3.4 (20-Feb-2022)
This release mostly fixes (security related) bugs. When building with MSVC, using CMake is preferred, see the README under "Building with CMake" for more information. Building with MSVC using solution files is deprecated and these files will be removed in the future.

General:
Fix 12 decoder bugs found by oss-fuzz, including CVE-2020-0499 (erikd, Martijn van Beurden)
Fix encoder bug CVE-2021-0561 (NeelkamalSemwal)
Integrate oss-fuzzers (erikd, Guido Vranken)
Seeking fixes (NeelkamalSemwal, Robert Kausch)
Various fixes and improvements (Andrei Astafev, Rosen Penev, Håkan Kvist, oreo639, erikd, Tamás Zahola, Ulrik Mikaelsson, Tyler Dunn, tmkk)
FLAC format:
(none)
Ogg FLAC format:
(none)
flac:
Various fixes and improvements (Andrei Astafev, Martijn van Beurden)
metaflac:
(none)
build system:
CMake improvements (evpobr, Vitaliy Kirsanov, erikd, Ozkan Sezer, Tyler Dunn, tg-m DeadSix27, ericLemanissier, Chocobo1).
Fixes for MinGW and MSVC (Ozkan Sezer).
Fix for clang (Ozkan Sezer)
Fix for PowerPC (Peter Seiderer, Thomas BERNARD)
Fix for FreeBSD PowerPC (pkubaj).
testing/validation:
Add Windows target to CI, improve logging (Ralph Giles)
CI improvements (Ralph Giles, Ewout ter Hoeven)
documentation:
Doxygen fixes (Tyler Dunn)
Fix typos (Tim Gates, maxz)
Interface changes:
libFLAC:
(none)
libFLAC++:
(none)


FLAC v.1.3.3.git-ce6dd6b5 win64 bundle
2020-06-12
Latest git, ICL 19 compile - by John33


FLAC 1.3.3 (4-Augs-2019)
General:
Fix CPU detection (Janne Hyvärinen).
Switch from unsigned types to uint32_t (erikd).
CppCheck fixes (erikd).
Improve SIMD decoding of 24 bit files (lvqcl).
POWER* amnd POWER9 improvements (Anton Blanchard).
More tests.
FLAC format:
(none)
Ogg FLAC format:
(none)
flac:
When converting to WAV, use WAVEFORMATEXTENSIBLE when bits per second is not 8 or 16 (erikd).
Fix --output-prefix with input-files in sub-directories (orbea).
metaflac:
(none)
plugins:
(none)
build system:
Cmake support (Vitaliy Kirsanov, evpobr).
Visual Studio updates (Janne Hyvärinen).
Fix for MSVC when UNICODE is enabled (lvqcl).
Fix for OpenBSD/i386 (Christian Weisgerber).
documentation:
(none)
libraries:
(none).
Interface changes:
libFLAC:
(none)
libFLAC++:
(none)


FLAC 1.3.2 (01-Jan-2017)
General:
Fix undefined behaviour using GCC/Clang UBSAN (erikd).
General hardening via fuzz testing with AFL (erikd and others).
General code improvements (lvqcl, erikd and others).
Add FLAC in MP4 specification docs (Ralph Giles).
MSVS build cleanups (lvqcl).
Fix some cppcheck warnings (erikd).
Assume all currently used OSes support SSE2.
FLAC format:
(none)
Ogg FLAC format:
(none)
flac:
Fix potential infinite loop on flac-to-flac conversion (erikd).
Add WAVEFORMATEXTENSIBLE to WAV (as needed) when decoding (lvqcl).
Only write vorbis-comments if they are non-empty.
Error out if decoding RAW with bits != (8|16|24).
metaflac:
Add --scan-replay-gain option.
plugins:
(none)
build system:
Fixes for MSVC and Makefile.lite build systems.
documentation:
(none)
libraries:
CPU detection cleanup and fixes (Julian Calaby, erikd and lvqcl).
Fix two stream decoder bugs (Max Kellermann).
Fix a NULL dereference bug (on a malformed file).
Changed the LPC order guess for a slight compression improvement, particularly for classical music (Martijn van Beurden).
Improved encoding speed on older Intel CPUs.
Fixed a seeking bug when decoding certain files (Miroslav Lichvar).
Put an upper bound (32768) on the number of seek points.
Fix potential memory leaks.
Support 64bit brword/bwword allowing FLAC__BYTES_PER_WORD to be set to 8 (disabled by default).
Fix an out-of-bounds heap read.
Win32: Only use large buffers when writing to disk.
Interface changes:
libFLAC:
(none)
libFLAC++:
(none)


FLAC 1.3.1 (25-Nov-2014)
General:
Improved decoding efficiency of all bit depths but especially so for 24 bits for IA32 architecture (lvqcl and Miroslav Lichvar).
Faster encoding using SSE and AVX (lvqcl).
Fixed bartlett, bartlett_hann and triangle functions.
New apodization functions partial_tukey and punchout_tukey for improved compression (Martijn van Beurden).
Retuned compression presets to incorporate new apodization functions (Martijn van Beurden).
Fix -Wcast-align warnings on armhf architecture (Erik de Castro Lopo).
FLAC format:
(none)
Ogg FLAC format:
(none)
flac:
Help output documentation improvements.
I/O buffering improvements on Windows to reduce disk fragmentation when writing files.
Only write vorbis-comments if they are non-empty.
metaflac:
(none)
plugins:
Fix symbol visibility in XMMS plugin.
build system:
Many fixes and improvements across all the build systems.
documentation:
Document new apodization windows.
libraries:
Fix CVE-2014-9028 (heap write overflow) and CVE-2014-8962 (heap read overflow) (Erik de Castro Lopo).
Interface changes:
libFLAC:
(none)
libFLAC++:
(none)


FLAC 1.3.0 (26-May-2013)
General:
Move development to Xiph.org git repository.
The --sector-align option of flac has been deprecated and may not exist in future versions. shntool provides similar functionality.
Support for the RF64 and Wave64 formats in flac (see below).
Better handling of cuesheets with non-CD-DA sample rates.
The --ignore-chunk-sizes option has been added to the flac command line tool.
FLAC format:
(none)
Ogg FLAC format:
(none)
flac:
Added support for encoding from and decoding to the RF64 format, and a new corresponding option --force-rf64-format. (SF #1762502). --keep-foreign-metadata is also supported.
Added support for encoding from and decoding to the Sony Wave64 format, and a new corresponding option --force-wave64-format. (SF #1769582). --keep-foreign-metadata is also supported.
Added new options --preserve-modtime and --no-preserve-modtime to specify whether or not output files should copy the timestamp and permissions from their input files. The default is --preserve-modtime as in previous versions. (SF #1805428).
Allow MM:SS:FF and MM:SS.SS time formats in non-CD-DA cuesheets. (SF #1947353, SF #2182432)
The --sector-align option of flac has been deprecated and may not exist in future versions. shntool provides similar functionality. (SF #1805946)
Improved error message when user attempts to decode a non-FLAC file (SF #2222789).
Fix bug where flac was disallowing use of --replay-gain when encoding from stdin (SF #1840124).
Fix bug with fractional seconds on some locales (SF #1815517, SF #1858012).
Read and write appropriate channel masks for 6.1 and 7.1 surround input WAV files. Documentation was also updated.
Correct Wave64 GUIDs.
Support 56kHz to 192kHz gain analysis (patch from Earl Chew)
Add ability to handle utf8 filenames on Windows (large set of patches from Janne Hyvärinen)
metaflac:
Allow MM:SS:FF and MM:SS.SS time formats in non-CD-DA cuesheets. (SF #1947353, SF #2182432)
plugins:
Minor updates for XMMS plugin.
Winamp2 plugin was dropped because Nullsoft has provided native FLAC support since 2006.
build system:
Fixes for autotools (including SF #1859664).
Fixes for MinGW (including SF #2000973, SF #2209829).
Fixes for gcc (including SF #1834168, SF #2002481).
Fixes for Sun Studio/Forte (SF #1701960).
Fixes for windows builds (including SF #1676822, SF #1756624, SF #1809863, SF #1911149).
Fixes for FreeBSD and OpenBSD.
Compile with GNU gcc _FORTIFY_SOURCE=2 and stack protection where those features are detected.
Enable a bunch of GCC compiler warnings and fix code that generates warnings.
documentation:
Document --ignore-chunk-sizes and --apply-replaygain-which-is-not-lossless option for flac.
libraries:
libFLAC encoder was defaulting to level 0 compression instead of 5 (SF #1816825).
Fix bug in bitreader handling of read callback returning a short count (SF #2490454).
Improve decoder's ability to distinguish between a FLAC sync code and an MPEG one (SF #2491433).
Interface changes:
libFLAC:
Added FLAC__format_blocksize_is_subset()
libFLAC++:
Add a number of convienience methods.

FLAC 1.2.1 (17-Sep-2007)
General:
With the new --keep-foreign-metadata in flac, non-audio RIFF and AIFF chunks can be stored in FLAC files and recreated when decoding. This allows, among other, things support for archiving BWF files and other WAVE files from editing tools that preserves all the metadata.
FLAC format:
Specified 2 new APPLICATION metadata blocks for storing WAVE and AIFF chunks (for use with --keep-foreign-metadata in flac).
The lead-out track number for non-CDDA cuesheets now must be 255.
Ogg FLAC format:
This is not a format change, but changed default extension for Ogg FLAC from .ogg to .oga, according to new Xiph specification (SF #1762492).
flac:
Added a new option --no-utf8-convert which works like it does in metaflac (SF #973740).
Added a new option --keep-foreign-metadata which can save/restore RIFF and AIFF chunks to/from FLAC files (SF #363478).
Changed default extension for Ogg FLAC from .ogg to .oga, according to new Xiph specification (SF #1762492).
Fixed bug where using --replay-gain without any padding option caused only a small PADDING block to be created (SF #1760790).
Fixed bug where encoding from stdin on Windows could fail if WAVE/AIFF contained unknown chunks (SF #1776803).
Fixed bug where importing non-CDDA cuesheets would cause an invalid lead-out track number (SF #1764105).
metaflac:
Changed default extension for Ogg FLAC from .ogg to .oga, according to new Xiph specification (SF #1762492).
Fixed bug where importing non-CDDA cuesheets would cause an invalid lead-out track number (SF #1764105).
plugins:
(none)
build system:
New configure option --disable-cpplibs to prevent building libFLAC++ (SF #1723295).
Fixed bug compiling flac without Ogg support (SF #1760786).
Fixed bug where sometimes an existing installation of flac could interfere with the build process (SF #1763690).
OS X fixes (SF #1786225).
MinGW fixes (SF #1684879).
Solaris 10 fixes (SF #1783225 SF #1783630).
OS/2 fixes (SF #1771378 SF #1229495).
automake-1.10 fixes (SF #1791361 SF #1792179).
documentation:
Added new tutorial section for flac.
Added example code section for using libFLAC/libFLAC++.
libraries:
libFLAC: Fixed very rare seek bug (SF #1684049).
libFLAC: Fixed seek bug with Ogg FLAC and small streams (SF #1792172).
libFLAC: 64-bit fixes (SF #1790872).
libFLAC: Fix assembler code to be position independent.
libFLAC: Optimization of a number of inner loop functions.
Added support for encoding the residual coding method introduced in libFLAC 1.2.0 (RESIDUAL_CODING_METHOD_PARTITIONED_RICE2) which will encode 24-bit files more efficiently.
Interface changes:
libFLAC:
Added FLAC__metadata_simple_iterator_is_last()
Added FLAC__metadata_simple_iterator_get_block_offset()
Added FLAC__metadata_simple_iterator_get_block_length()
Added FLAC__metadata_simple_iterator_get_application_id()
libFLAC++:
Added FLAC::Metadata::SimpleIterator::is_last()
Added FLAC::Metadata::SimpleIterator::get_block_offset()
Added FLAC::Metadata::SimpleIterator::get_block_length()
Added FLAC::Metadata::SimpleIterator::get_application_id()

FLAC 1.2.0 (23-Jul-2007)
General:
Small encoding speedups for all modes.
FLAC format:
One of the reserved bits in the FLAC frame header has been assigned for future use; make sure to refer to the porting guide if you parse FLAC streams manually.
Ogg FLAC format:
(none)
flac:
Added runtime detection of SSE OS support for most operating systems.
Added a new undocumented option --ignore-chunk-sizes for ignoring the size of the 'data' chunk (WAVE) or 'SSND' chunk (AIFF). Can be used to encode files with bogus data sizes (e.g. with WAV files piped from foobar2000 to flac.exe as an external encoder). Use with caution: all subsequent data is treated as audio, so the data/SSND chunk must be the last or the following data/tags will be treated as audio and encoded.
metaflac:
(none)
plugins:
(none)
build system:
Added solution and project files for building with VC++ 2005.
libraries:
Added runtime detection of SSE OS support for most operating systems.
Fixed bug where invalid seek tables could cause some seeks to fail.
Added support for decoding the new residual coding method (RESIDUAL_CODING_METHOD_PARTITIONED_RICE2).
Interface changes (see also the porting guide for specific instructions on porting to FLAC 1.2.0):
libFLAC:
Added FLAC__format_sample_rate_is_subset()
libFLAC++:
Added FLAC::Decoder::Stream::get_decode_position()

FLAC 1.1.4 (13-Feb-2007)
General:
Improved compression with no change to format or decrease in speed.
Encoding and decoding speedups for all modes. Encoding at -8 is twice as fast.
FLAC format:
(none)
Ogg FLAC format:
(none)
flac:
Improved compression with no change to format or decrease in speed.
Encoding and decoding speedups for all modes. Encoding at -8 is twice as fast.
Added a new option -w,--warnings-as-errors for treating all warnings as errors.
Allow --picture option to take only a filename, and have all other attributes extracted from the file itself.
Fixed a bug that caused suboptimal default compression settings in some locales (SF #1608883).
Fixed a bug where FLAC-to-FLAC transcoding of a corrupted FLAC file would truncate the transcoded file at the first error (SF #1615019).
Fixed a bug where using -F with FLAC-to-FLAC transcoding of a corrupted FLAC would have no effect (SF #1615391).
Fixed a bug where new PICTURE metadata blocks specified with --picture would not be transferred during FLAC-to-FLAC transcoding (SF #1627993).
metaflac:
Allow --import-picture-from option to take only a filename, and have all other attributes extracted from the file itself.
plugins:
Fixed a bug in the XMMS plugin where Ctrl-3 (file info) would cause a crash if the file did not exist (SF #1634941).
build system:
Fixed a makefile linkage bug with libogg (SF #1611414).
Added pkg-config files for libFLAC and libFLAC++ (SF #1647881).
Added --disable-ogg option for building without Ogg support even if libogg is installed (SF #1196996).
libraries:
Completely rewritten bitbuffer which uses native machine word size instead of bytes for dramatic speed improvements. The speedup should be most dramatic on CPUs with slower byte manipulation capability and big-endian machines.
Much faster Rice partition size estimation which greatly speeds encoding in higher modes.
Increased compression for all modes.
Reduced memory requirements for encoder and decoder.
Fixed a bug with default apodization settings that were erroneous in some locales (SF #1608883).
Interface changes:
libFLAC:
(behavior only) FLAC__stream_encoder_set_metadata() now makes a copy of the "metadata" array of pointers (but still not copies of the objects themselves) so the client does not need to maintain its copy of the array after the call.
libFLAC++:
(none)

FLAC 1.1.3 (27-Nov-2006)
General:
Improved compression with no impact on format or decoding speed.
Much better recovery for corrupted files
Better multichannel support
Large file (>2GB) support everywhere
flac now supports FLAC and Ogg FLAC as input to the encoder (e.g. can re-encode FLAC to FLAC) and preserve all the metadata like tags, etc.
New PICTURE metadata block for storing things like cover art, new --picture option to flac and --import-picture-from option to metaflac for importing pictures, new --export-picture-to option to metaflac for exporting pictures, and metadata API additions for searching for suitable pictures based on type, size and color constraints.
Support for new REPLAYGAIN_REFERENCE_LOUDNESS tag.
Fixed a bug in Ogg FLAC encoding where metadata was not being updated properly. Existing Ogg FLAC files should be recoded to fix up the metadata, e.g. flac -Vf -S 10s --ogg file.ogg
In the developer libraries, the interface has been simplfied by merging the three decoding layers into a single class; ditto for the encoders. Also, libOggFLAC has been merged into libFLAC and libOggFLAC++ has been merged into libFLAC++ so there is a single API supporting both native FLAC and Ogg FLAC.
FLAC format:
New PICTURE metadata block for storing things like cover art.
Speaker assignments and channel orders for 3-6 channels (see frame header).
Further restrictions on the FLAC subset when the sample rate is <=48kHz; in this case the maximum LPC order is now 12 and maximum blocksize is 4608. This is to further limit the processing and memory requirements for hardware implementations while not measurably affecting compression.
Ogg FLAC format:
(none)
flac:
Improved the -F option to allow decoding of FLAC files whose metadata is corrupted, and other kinds of severe corruption.
Encoder can now take FLAC and Ogg FLAC as input. The output FLAC file will have all the same metadata as the original unless overridden with options on the command line.
Encoder can now take WAVEFORMATEXTENSIBLE WAVE files as input; decoder will output WAVEFORMATEXTENSIBLE WAVE files when necessary to conform to the latest Microsoft specifications.
Now properly supports AIFF and WAVEFORMATEXTENSIBLE multichannel input, performing necessary channel reordering both for encoding and decoding. WAVEFORMATEXTENSIBLE channel mask is also saved to a tag on encoding and restored on decoding for situations when there is no natural mapping to FLAC channel assignments.
Expanded support for "odd" sample resolutions to WAVE and AIFF input; all resolutions from 4 to 24 bits-per-sample now supported for all input types.
Added a new option --tag-from-file for setting a tag from file (e.g. for importing a cuesheet as a tag).
Added a new option --picture for adding pictures.
Added a new option --apodization for specifying the window function(s) to be used in LPC analysis.
Added support for encoding from non-compressed AIFF-C (SF #1090933).
Importing of non-CDDA-compliant cuesheets now only issues a warning, not an error (see here).
MD5 comparison failures on decoding are now an error instead of a warning and will also return a non-zero exit code (SF #1493725).
The default padding size is now 8K, or 64K if the input audio stream is more than 20 minutes long.
Fixed a bug in cuesheet parsing where it would return an error if the last line of the cuesheet did not end with a newline.
Fixed a bug that caused a crash when -a and -t were used together (SF #1229481).
Fixed a bug with --sector-align where appended samples were not always totally silent (SF #1237707).
Fixed bugs with --sector-align and raw input files.
Fixed a bug printing out unknown AIFF subchunk names (SF #1267476).
Fixed a bug where WAVE files with "data" subchunks of size 0 where accepted (SF #1293830).
Fixed a bug where sync error at end-of-stream of truncated files was not being caught (SF #1244071).
Fixed a problem with filename parsing if file does not have extension but also has a . in the path (SF #1161916).
Fixed a problem with fractional-second parsing for --skip/--until in some locales (SF #1031043).
Increase progress report rate when -p and -e are used together (SF #1580122).
metaflac:
Added support for read-only operations on Ogg FLAC files.
Added a new option --set-tag-from-file for setting a tag from file (e.g. for importing a cuesheet as a tag).
Added a new option --import-picture-from for importing pictures.
Added a new option --export-picture-to for exporting pictures.
Added shorthand operation --remove-replay-gain for removing ReplayGain tags.
--export-cuesheet-to now properly specifies the FLAC file name (SF #1272825).
Importing of non-CDDA-compliant cuesheets now issues a warning.
Removed the following deprecated tag editing options; you should use the new option names shown instead:
Removed --show-vc-vendor; use --show-vendor-tag
Removed --show-vc-field; use --show-tag
Removed --remove-vc-all; use --remove-all-tags
Removed --remove-vc-field; use --remove-tag
Removed --remove-vc-firstfield; use --remove-first-tag
Removed --set-vc-field; use --set-tag
Removed --import-vc-from; use --import-tags-from
Removed --export-vc-to; use --export-tags-to
Disallow multiple input FLAC files when --import-tags-from=- is used (SF #1082577).
plugins:
When ReplayGain is on, if tags for the preferred kind of gain (album/track) are not in a stream, the other kind will be used.
Added ReplayGain info to file info box in XMMS plugin
Fixed UTF-8 decoder to disallow non-shortest-form and surrogate sequences (see here).
build system:
Added support for building on OS/2 with EMX (SF #1229495)
Added support for building with Borland C++ (SF #1599018)
Added a --disable-xmms-plugin option to configure to prevent building the XMMS plugin (SF #930494).
Added a --disable-doxygen-docs option to configure for disabling Doxygen-based API doc generation (SF #1365935).
Added a --disable-thorough-tests option to configure to do the basic library, stream, and tool tests in a reasonable time (SF #1077948).
Added large file support with AC_SYS_LARGEFILE; use --disable-largefile with configure to disable.
libraries:
Merged libOggFLAC into libFLAC; both formats are now supporte through the same API.
Merged libOggFLAC++ into libFLAC++; both formats are now supporte through the same API.
libFLAC and libFLAC++: Simplified encoder setup with new FLAC__stream_encoder_set_compression_level() function.
libFLAC: Improved compression with no impact on FLAC format or decoding time by adding a windowing stage before LPC analysis.
libFLAC: Fixed a bug where missing STREAMINFO fields (min/max framesize, total samples, MD5 sum) and seek point offsets were not getting rewritten back to Ogg FLAC file (SF #1338969).
libFLAC: Fixed a bug in cuesheet parsing where it would return an error if the last line of the cuesheet did not end with a newline.
libFLAC: Fixed UTF-8 decoder to disallow non-shortest-form and surrogate sequences (see here).
libFLAC: Fixed a bug in the return value for FLAC__stream_decoder_set_metadata_respond_application() and FLAC__stream_decoder_set_metadata_ignore_application() when there was a memory allocation error (SF #1235005).
Interface changes (see also the porting guide for specific instructions on porting to FLAC 1.1.3):
all libraries;
Merged libOggFLAC into libFLAC; both formats are now supporte through the same API.
Merged libOggFLAC++ into libFLAC++; both formats are now supporte through the same API.
Merged seekable stream decoder and file decoder into the stream decoder.
Merged seekable stream encoder and file encoder into the stream encoder.
Added #defines for the API version number to make porting easier; see include/lib*FLAC*/export.h.
libFLAC:
Added FLAC__stream_encoder_set_apodization()
Added FLAC__stream_encoder_set_compression_level()
Added FLAC__metadata_object_cuesheet_calculate_cddb_id()
Added FLAC__metadata_get_cuesheet()
Added FLAC__metadata_get_picture()
Added FLAC__metadata_chain_read_ogg() and FLAC__metadata_chain_read_ogg_with_callbacks()
Changed FLAC__stream_encoder_finish() now returns a FLAC__bool to signal a verify failure, or error processing last frame or updating metadata.
Changed FLAC__StreamDecoderState: removed state FLAC__STREAM_DECODER_UNPARSEABLE_STREAM
Changed FLAC__StreamDecoderErrorStatus: new error code FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM
The above two changes mean that when the decoder encounters what it thinks are unparseable frames from a future decoder, instead of returning a fatal error with the FLAC__STREAM_DECODER_UNPARSEABLE_STREAM state, it just calls the error callback with FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM and leaves the behavior up to the application.
libFLAC++:
Added FLAC::Metadata::Picture
Added FLAC::Encoder::Stream::set_apodization()
Added FLAC::Encoder::Stream::set_compression_level()
Added FLAC::Metadata::CueSheet::calculate_cddb_id()
Added FLAC::Metadata::get_cuesheet()
Added FLAC::Metadata::get_picture()
Changed FLAC::Metadata::Chain::read() to accept a flag denoting Ogg FLAC input
Changed FLAC::Decoder::Stream::finish() now returns a bool to signal an MD5 failure like FLAC__stream_decoder_finish() does.
Changed FLAC::Encoder::Stream::finish() now returns a bool to signal a verify failure, or error processing last frame or updating metadata.
libOggFLAC:
Merged into libFLAC.
libOggFLAC++:
Merged into libFLAC++.

FLAC 1.1.2 (05-Feb-2005)
General:
Sped up decoding by a few percent overall.
Sped up encoding when not using LPC (i.e. when using flac options -0, -1, -2, or -l 0).
Fixed a decoding bug that could cause sync errors with some ID3v1-tagged FLAC files.
Added HTML documentation for metaflac.
FLAC format:
(none)
Ogg FLAC format:
(none)
flac:
New option --input-size to manually specify the input size when encoding raw samples from stdin.
metaflac:
(none)
plugins:
Added support for HTTP streaming in XMMS plugin. NOTE: there is a bug in the XMMS mpg123 plugin that hijacks FLAC streams; to fix it you will need to add the '.flac' extension to the list of exceptions in Input/mpg123/mpg123.c:is_our_file() in the XMMS sources and recompile.
build system:
(none)
libraries:
libFLAC: Sped up Rice block decoding in the bitbuffer, resulting in decoding speed gains of a few percent.
libFLAC: Sped up encoding when not using LPC (i.e. max_lpc_order == 0).
libFLAC: Trailing NUL characters maintained on Vorbis comment entries so they can be treated like C strings.
libFLAC: More FLAC tag (i.e. Vorbis comment) validation.
libFLAC: Fixed a bug in the logic that determines the frame or sample number in a frame header; the bug could cause sync errors with some ID3v1-tagged FLAC files.
libFLAC, libOggFLAC: Can now be compiled to use only integer instructions, including encoding. The decoder is almost completely integer anyway but there were a couple places that needed a fixed-point replacement. There is no fixed-point version of LPC analysis yet, so if libFLAC is compiled integer-only, the encoder will behave as if the max LPC order is 0 (i.e. used fixed predictors only). LPC decoding is supported in all cases as it always was integer-only.
Interface changes:
libFLAC:
Changed: Metadata object interface now maintains a trailing NUL on Vorbis comment entries for convenience.
Changed: Metadata object interface now validates all Vorbis comment entries on input and returns false if an entry does not conform to the Vorbis comment spec.
Added FLAC__format_vorbiscomment_entry_name_is_legal()
Added FLAC__format_vorbiscomment_entry_value_is_legal()
Added FLAC__format_vorbiscomment_entry_is_legal()
Added FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair()
Added FLAC__metadata_object_vorbiscomment_entry_to_name_value_pair()
Changed the signature of FLAC__metadata_object_vorbiscomment_entry_matches(): the first argument is now FLAC__StreamMetadata_VorbisComment_Entry entry (was const FLAC__StreamMetadata_VorbisComment_Entry *entry), i.e. entry is now pass-by-value.
libFLAC++:
Changed: Metadata object interface now maintains a trailing NUL on Vorbis comment values for convenience.
Changed: Metadata object interface now validates all Vorbis comment entries on input and returns false if an entry does not conform to the Vorbis comment spec.
Changed: All Metadata objects' operator=() methods now return a reference to themselves.
Added methods to FLAC::Metadata::VorbisComment::Entry for setting comment values from null-terminated strings:
Entry(const char *field)
Entry(const char *field_name, const char *field_value)
bool set_field(const char *field)
bool set_field_value(const char *field_value)
Changed the signature of FLAC::Metadata::VorbisComment::get_vendor_string() and FLAC::Metadata::VorbisComment::set_vendor_string() to use a UTF-8, NUL-terminated string const FLAC__byte * for the vendor string instead of FLAC::Metadata::VorbisComment::Entry.
Added FLAC::Metadata::*::assign() to all Metadata objects.
Added bool FLAC::Metadata::get_tags(const char *filename, VorbisComment &tags)
libOggFLAC:
(none)
libOggFLAC++:
(none)

FLAC 1.1.1 (01-Oct-2004)
General:
Ogg FLAC seeking now works
New optimizations almost double the decoding speed on PowerPC (e.g. Mac G4/G5)
A native OS X release thanks to updated Project Builder and autotools files
FLAC format:
Made invalid the metadata block type 127 so that audio frames can always be distinguished from metadata by seeing 0xff as the first byte. (This was also required for the Ogg FLAC mapping.)
Ogg FLAC format:
First official FLAC->Ogg bitstream mapping standardized (see new FLAC-to-Ogg mapping specification). See the documentation for the --ogg switch about having to re-encode older Ogg FLAC files.
flac:
Print an error when output file already exists instead of automatically overwriting.
New option -f (--force) to force overwriting if the output file already exists.
New option --cue to select a specific section to decode using cuesheet track/index points.
New option --totally-silent to suppress all output.
New (but undocumented) option --apply-replaygain-which-is-not-lossless which applies ReplayGain to the decoded output. See this thread for usage and caveats.
When encoding to Ogg FLAC, use a random serial number (instead of 0 as was done before) when a serial number is not specified.
When encoding multiple Ogg FLAC streams, --serial-number or random serial number sets the first number, which is then incremented for subsequent streams (before, the same serial number was used for all streams).
Decoder no longer exits with an error when writing to stdout and the pipe is broken.
Better explanation of common error messages.
Default extension when writing AIFF files is .aif (before, it was .aiff).
Write more common representation of SANE numbers in AIFF files.
Bug fix: calculating ReplayGain on 48kHz streams.
Bug fix: check for supported block alignments in WAVE files.
Bug fix: "offset" field in AIFF SSND chunk properly handled.
Bug fix: #679166: flac doesn't respect RIFF subchunk padding byte.
Bug fix: #828391: --add-replay-gain segfaults.
Bug fix: #851155: Can't seek to position in flac file.
Bug fix: #851756: flac --skip --until reads entire file.
Bug fix: #877122: problem parsing cuesheet with CATALOG entry.
Bug fix: #896057: parsing ISRC number from cuesheet.
metaflac:
Renamed the tag editing options as follows (the ...-vc-... options still work but are deprecated):
--show-vc-vendor becomes --show-vendor-tag
--show-vc-field becomes --show-tag
--remove-vc-all becomes --remove-all-tags
--remove-vc-field becomes --remove-tag
--remove-vc-firstfield becomes --remove-first-tag
--set-vc-field becomes --set-tag
--import-vc-from becomes --import-tags-from
--export-vc-to becomes --export-tags-to
Better explanation of common error messages.
Bug fix: calculating ReplayGain on 48kHz streams.
Bug fix: incorrect numbers when printing seek points.
plugins:
Speed optimization in ReplayGain synthesis.
Speed optimization in XMMS playback.
Support for big-endian architectures in XMMS plugin.
Removed support for ID3 tags.
Bug fix: make hard limiter default to off in XMMS plugin.
Bug fix: stream length calculation bug in XMMS plugin, debian bug #200435; see also.
Bug fix: small memory leak in XMMS plugin.
build system:
ordinals.h is now static, not a build-generated file anymore.
libraries:
libFLAC: PPC+Altivec optimizations of some decoder routines.
libFLAC: Make stream encoder encode the blocksize and sample rate in the frame header if at all possible (not in STREAMINFO), even if subset encoding was not requested.
libFLAC: Bug fix: fixed seek routine where infinite loop could happen when seeking past end of stream.
libFLAC, libFLAC++: added methods to skip single frames, useful for quickly finding frame boundaries (see interface changes below).
libOggFLAC, libOggFLAC++: New seekable-stream and file encoder and decoder APIs to match native FLAC APIs (see interface changes below).
Interface changes:
libFLAC:
Added FLAC__metadata_get_tags()
Added callback-based versions of metadata editing functions:
FLAC__metadata_chain_read_with_callbacks()
FLAC__metadata_chain_write_with_callbacks()
FLAC__metadata_chain_write_with_callbacks_and_tempfile()
FLAC__metadata_chain_check_if_tempfile_needed()
Added decoder functions for skipping single frames, also useful for quickly finding frame boundaries:
FLAC__stream_decoder_skip_single_frame()
FLAC__seekable_stream_decoder_skip_single_frame()
FLAC__file_decoder_skip_single_frame()
Added new required tell callback on seekable stream encoder:
FLAC__SeekableStreamEncoderTellStatus and FLAC__SeekableStreamEncoderTellStatusString[]
FLAC__SeekableStreamEncoderTellCallback
FLAC__seekable_stream_encoder_set_tell_callback()
Changed FLAC__SeekableStreamEncoderState by adding FLAC__SEEKABLE_STREAM_ENCODER_TELL_ERROR
Changed Tell callback is now required to initialize seekable stream encoder
Deleted erroneous and unimplemented FLAC__file_decoder_process_remaining_frames()
libFLAC++:
Added FLAC::Metadata::get_tags()
Added decoder functions for skipping single frames, also useful for quickly finding frame boundaries:
FLAC::Decoder::Stream::skip_single_frame()
FLAC::Decoder::SeekableStream::skip_single_frame()
FLAC::Decoder::File::skip_single_frame()
Added encoder functions for setting metadata:
FLAC::Encoder::Stream::set_metadata(FLAC::Metadata::Prototype **metadata, unsigned num_blocks)
FLAC::Encoder::SeekableStream::set_metadata(FLAC::Metadata::Prototype **metadata, unsigned num_blocks)
FLAC::Encoder::File::set_metadata(FLAC::Metadata::Prototype **metadata, unsigned num_blocks)
Added new required tell callback on seekable stream encoder:
pure virtual FLAC::Encoder::SeekableStream::tell_callback()
Changed Tell callback is now required to initialize seekable stream encoder
Deleted the following methods:
FLAC::Decoder::Stream::State::resolved_as_cstring()
FLAC::Encoder::Stream::State::resolved_as_cstring()
libOggFLAC:
Added OggFLAC__SeekableStreamDecoder interface
Added OggFLAC__FileDecoder interface
Added OggFLAC__SeekableStreamEncoder interface
Added OggFLAC__FileEncoder interface
Added OggFLAC__stream_decoder_get_resolved_state_string()
Added OggFLAC__stream_encoder_get_resolved_state_string()
Added OggFLAC__stream_encoder_set_metadata_callback()
Changed OggFLAC__StreamDecoderState by adding OggFLAC__STREAM_DECODER_END_OF_STREAM
libOggFLAC++:
Added OggFLAC::Decoder::SeekableStream interface
Added OggFLAC::Decoder::File interface
Added OggFLAC::Encoder::SeekableStream interface
Added OggFLAC::Encoder::File interface
Added OggFLAC::Decoder::Stream::get_resolved_state_string()
Added OggFLAC::Encoder::Stream::get_resolved_state_string()
Added pure virtual OggFLAC::Encoder::Stream::metadata_callback()




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