Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

0.9.1 - 2021-05-19

Added

• Added strict mode/flags (enabled by default): AVIF_STRICT_PIXI_REQUIRED, AVIF_STRICT_CLAP_VALID
• avifdec: Added --no-strict to disable all strict flags
• avifdec: Added -r (--raw-color), which avoids multiplying against AVIF alpha channel before packing into non-alpha formats (JPEG)
• avifenc: Recognize the Y4M format string “C420mpeg2”
• avifenc: Add --crop convenient alternative arg to the difficult-to-use --clap arg
• avifenc: New default for --yuv: "auto", which will use a source JPEG's internal YUV format instead of YUV444, if detected
  • Uses: Prevent colorspace conversion when reading from JPEG if possible (tongyuantongyu)
• avifenc/avifdec: Add helpful values/calculations when dumping clap box
• Added avifDiagnostics, which allows for a detailed, freeform error string upon decode error
• Create helper avifCropRect struct and methods for helping to manipulate/populate/validate avifCleanApertureBox
• Added ability to set codec-specific options for color or alpha only
• Support for libaom's ALL_INTRA mode (if available)
• Create avifDecoder.imageCountLimit as a sanity check against malformed files
• SVT: Image sequence encoding support (tongyuantongyu)
• Added rav1e to AppVeyor builds

Changed

• avifenc/avifdec: Link AOM_LIBRARIES and use CXX if vmaf is present (1480c1)

• Ensure that an AVIF has a ftyp box, and based on ftyp, has other appropriate toplevel boxes present as well

• Avoid linking against libyuv if it is too old / incompatible

• Always require a primary item when decoding items

• Add some strictness around ipma box parsing (version/flags tuples must be unique across ipma boxes in a file)

• Fix alpha grids by properly writing alpha grid metadata payload

• A HandlerBox (hdlr) of type ‘pict’ must be the first box within the MetaBox (meta)

• Add some typedefs for various flag decls in avif.h to self-document which flags should be used in which function arguments

• When encoding single-frame images using libaom, clean up the encoder immediately after encoding the frame to cut down on resources high watermarks

• Fail on reformat Identity (MC=0) with subsampling (not using YUV444)

• Warn if alpha is limited range (deprecated)

• Validate the first_chunk fields in the stsc box

• In libaom all intra mode, set cq-level for user

• Check the return values of some aom_codec_ calls and add diagnostics output (wantehchang)

• Use aom_codec_set_option() if available (allows for future compat with libaom 3.0+ advanced features)

• rav1e: Use cargo cinstall in local builds to ensure consistency in target output, as cbuild no longer builds directly into target/release

• Tweaks to compiler flags (analyze related)

• Use libyuv BT.709 & 2020 full range YuvConstants (wantehchang)

• Multiply color with alpha for opaque RGB format during conversion (see #520)

• switch docker to ubuntu 20.04, fix tzdata install (paskal)

• Added an “Understanding maxThreads” explanatory comment block in avif.h

• Minor fixes to support AVIF_CODEC_AOM_ENCODE

• Various minor code/comments cleanup

• CI tweaks, macOS build, and caching / speed increases (EwoutH)

• Update aom.cmd: v3.1.0

• Update dav1d.cmd: 0.9.0

• Update libgav1: v0.16.3

• Update libyuv.cmd: 2f0cbb9

0.9.0 - 2021-02-22

Added

• Image grid encoding
• Premultiplied alpha support (tongyuantongyu)
• avifenc: Image grid encoding (-g, --grid)
• avifenc: Harvest framerate from y4m headers as the “default”, if present
• avifenc: Recognize the Y4M format string “C420mpeg2” (wantehchang)
• Basic deduplication when writing mdat chunks

Changed

• avifenc: Adjusted min/max/speed/fps defaults
• Better handling for export headers (tongyuantongyu)
• Use procedure specified in H.273 to quantize YUV (tongyuantongyu)
• Impose a maximum of 4096 bytes on searchSampleSize (wantehchang, fixes oss-fuzz perf issue / timeout)
• Update aom.cmd: v2.0.2
• Update dav1d.cmd: 0.8.2
• Update libgav1.cmd: 4a89dc3 / lts_2020_09_23
• Update rav1e.cmd: 0.4
• Update svt.cmd/svt.sh: v0.8.6
• Force libjpeg to output in RGB Colorspace (bugfix)
• Minor other compilation/linking/formatting/comment fixes

0.8.4 - 2020-11-23

Added

• YCgCo support (full-range only, wantehchang)
• Expose maxThreads to avifDecoder, add --jobs to avifdec
• Add avifDecoderNthImageMaxExtent() streaming helper function to determine future reads
• Create AVIF_VERSION_DEVEL, which allows for in-development changes to be detected during the build
• New avifResult values: AVIF_RESULT_INVALID_ARGUMENT, AVIF_RESULT_NOT_IMPLEMENTED

Changed

• Read/write one of each type of colr box, as allowed in HEIF 6.5.5.1 Amendment 3 (also now supported in libheif)
• avifenc/avifdec: Now guesses input file format by header inspection instead of extension
• avifenc: Fix y4m/stdin corner cases when trying to detect a “single image” encode
• Add some protections against improperly using AVIF_ADD_IMAGE_FLAG_SINGLE
• imir transformation: Disambiguate all usages of “vertical” and “horizontal” across comments and tooling
• Print MC value when warning resetting to defaults (wantehchang)
• Fix grid image rows/cols parsing on invalid data
• Allow override of HAVE_POISON_SYSTEM_DIRECTORIES_WARNING (bnason-nf)
• Lots of comments clarifications in avif.h

0.8.3 - 2020-11-09

Added

• SVT-AV1 encode support (jonsneyers)
• Basic libyuv support (8bpc only, see usage/limitations in avif.h)
• Refactor avifChromaUpsampling for ease in high level decision making and adding more filters in the future (minor, benign breaking change due to enum reordering)
• New CMake options: AVIF_CODEC_AOM_DECODE, AVIF_CODEC_AOM_ENCODE
• New examples in examples/ dir (encode, decode_file, decode_memory, decode_streaming) to replace stale, not-compiled examples in README

Changed

• avifenc: Explicitly signal SRGB CP/TC if the source image and user don't specify, and no ICC profile is present
• Set g_lag_in_frames to 1 if encoding single image (encode memory optimization, wantehchang)
• Early-out with OK in avifParse() if the expected top-level boxes were already parsed (streaming optimization)
• Check increading item_ID and ipmaSeen in ipma box (wantehchang)
• Fail gracefully in avifEncoderAddImage() if libavif wasn't compiled with encoding support
• Add size_t casts to fix MSVC x86 compiler warnings (wantehchang)
• Link with {ZLIB_LIBRARY} after ${PNG_LIBRARY} (wantehchang)
• Fix a crash in avifJPEGRead() on fopen() failure (wantehchang)
• No need to include ${ZLIB_INCLUDE_DIR} (wantehchang)
• Put the value of ZLIB_INCLUDE_DIR in the cache (wantehchang)
• Don't set image->alphaRange to yuvRange (wantehchang)
• Expose chroma sample position in decoded images (wantehchang)
• avifDecoderNthImage: tighten decoder flush (wantehchang)
• Cleanup avifIOReadFunc comments for clarity (wantehchang)
• Minor code cleanup
• Minor CMake cleanup

Removed

• Remove disableGridImages from avifDecoder (wantehchang)

0.8.2 - 2020-10-14

Added

• avifIO reader API: allowing for parsing / image decoding without having the entire AVIF payload yet
• Codec-specific options plumbing for advanced encoding settings
• Add libaom codec-specific options (wantehchang)
• avifenc: Allow endusers to ignore an AVIF's ICC profile during conversion (--ignore-icc)
• avifenc: Allow the setting/overriding of XMP, Exif, and ICC profiles
• Add the disableGridImages setting to avifDecoder
• Add AVIF_FMT_ZU to fix compiling with non-standard/old compilers
• Add AVIF_ENABLE_WERROR (ON by default)
• Add AVIF_ENABLE_COVERAGE for basic llvm coverage report generation

Changed

• Support multiple extents in an ItemLocationBox
• Store all alpha payloads before color payloads in mdat
• Perform 0.5 UV bias with integers, as 128/512/2048 aren't exactly 0.5, but are expected to behave as such
• Avoid libpng's complaints about specific ICC profiles
• Disable receiving one-frame-per-layer when decoding scalable AVIFs with aom and dav1d
• Fix incorrect 8-to-16 monochrome YUV conversion
• Set max image size to 16384 * 16384
• Remove range and sample position from avifImageStealPlanes()
• Ensure only one of each mandatory-unique box in a meta box exists
• Ensure each item ID is cited once in an iloc box
• Sanity check merged extents item size against the file size
• Various image grid bugfixes
• Error out with AVIF_RESULT_REFORMAT_FAILED if request uses an unsupported MC
• Fix memory leak in avifenc when encoding image sequences
• Move oss-fuzz fuzzer implementation into tests/oss-fuzz
• avifdec: actually propagate the commandline codecChoice to the avifDecoder
• Fix an infinite loop in codec_dav1d on a carefully-malformed AV1 payload
• Fix a few issues with warnings in gcc/clang
• Various comments tweaks

0.8.1 - 2020-08-05

Added

• Add ignoreAlpha field to avifRGBImage (linkmauve)
• Save support in gdk-pixbuf component (novomesk)

Changed

• Only ever create one iref box, filled with multiple cdsc boxes (#247)
• Fix incorrect 16-to-8 monochrome YUV conversion
• Make decoding optional in CMake, like encoding is
• Include avif INTERFACE_INCLUDE_DIRECTORIES first (cryptomilk)
• Set C standard to C99, adjust flags for dav1d (1480c1)
• Minor cleanup/fixes in reformat.c (wantehchang)
• Fix a crash in the gdk-pixbuf loader, removed unnecessary asserts (novomesk)

0.8.0 - 2020-07-14

Added

• Monochrome (YUV400) support **
  • All encoding/decoding and internal memory savings are done/functional
  • libaom has a bug in chroma_check() which crashes when encoding monochrome, to be fixed in a future (>v2.0.0) version
  • rav1e didn't implement CS400 until rav1e v0.4.0
  • libavif safely falls back to YUV420 when these earlier codec versions are detected
    • NOTE: If you want to do heavy monochrome testing, wait for newer versions to libaom/rav1e!
• Image sequence encoding support
  • Required medium-sized refactors in the codec layers
  • Image sequences (tracks) now fully support all metadata properly (Exif/XMP/transforms)
  • avifenc can now encode a series of same-sized images with a consistent framerate, or each with their own custom duration
• Bilinear upsampling support
• avifenc: Add --ignore-icc, which avoids embedding the ICC profile found in the source image
• avifdec: Add --info, which attempts to decode all frames and display their basic info (merge of avifdump)
• avifenc: add --tilerowslog2 and --tilecolslog2 (wantehchang)
• Added contrib dir for any unofficially supported code contributions (e.g. gdk-pixbuf)

Changed

• CICP Refactor (breaking change!)
  • Remove most references to “NCLX”, as it is mostly an implementation detail, and the values are really from MPEG-CICP
  • Eliminate avifProfileFormat: having an ICC profile is not mutually exclusive with signaling CICP
  • CICP is now always available in an avifImage, set to unspecified by default
  • Added --cicp as an alias for --nclx (semi-deprecated)
  • Setting CICP via avifenc no longer overrides ICC profiles, they co-exist
  • Simplified avifenc argument parsing / warnings logic
  • avifenc/avifdec/avifdump now all display CICP when dumping AVIF information
  • nclx colr box contents are guaranteed to override AV1 bitstream CICP (as MIAF standard specifies)
  • Added comments explaining various decisions and citing standards
  • Removed ICC inspection code regarding chroma-derived mtxCoeffs; this was overdesigned. Now just honor the assoc. colorPrimaries enum
  • Reworked all examples in the README to reflect the new state of things, and clean out some cruft
  • Harvest CICP from AV1 bitstream as a fallback in avifDecoderParse() if nclx box is absent
• All data other than actual pixel data should be available and valid after a call to avifDecoderParse()
• Refactor avifDecoder internal structures to properly handle meta boxes in trak boxes (see avifMeta)
• Update libaom.cmd to point at the v2.0.0 tag
• Update dav1d.cmd to point at the 0.7.1 tag
• Re-enable cpu-used=7+ in codec_aom when libaom major version > 1
• Memory allocation failures now cause libavif to abort the process (rather than undefined behavior)
• Fix to maintain alpha range when decoding an image grid with alpha
• Improvements to avifyuv to show drift when yuv and rgb depths differ
• Remove any references to (incorrect) “av01” brand (wantehchang)
• Set up libaom to use reduced_still_picture_header (wantehchang)
• Use libaom cpu_used 6 in “good quality” usage mode (wantehchang)
• Update avifBitsReadUleb128 with latest dav1d code (wantehchang)
• Set encoder chroma sample position (wantehchang)

0.7.3 - 2020-05-04

Added

• avifenc: Lossless (--lossless, -l) mode, which sets new defaults and warns when anything would cause the AVIF to not be lossless

Changed

• Minor cleanup for -Wclobbered warnings
• Minor fixes to README and code (fallout from enum rework)
• Protect against oversized (out of bounds) samples in avif sample tables
• Optimization: avoid AV1 sample copying when feeding data to dav1d

0.7.2 - 2020-04-24

Added

• Recognize extensions with capital letters / capslock
• Proper support for AVIF_NCLX_MATRIX_COEFFICIENTS_IDENTITY

Changed

• Large nclx enum refactor (breaking change), reworking all 3 enums to better match AV1 codec enums
• Fixes to ‘essential’ item properties (marking av1C as essential, ignoring any items containing unsupported essential props)
• avifenc - Allow --nclx to override embedded ICC profiles (with a warning), instead of --nclx being ignored
• avifenc - Choose high-quality-but-lossy QP defaults, and a default speed of 8
• avifdump - Fix format specifiers for 32bit
• Now prioritizing libaom over rav1e when both are present
• Remove -Wclobbered dodging (volatile) and instead just disable the warning in avifpng/avifjpeg
• avifyuv: extra testing modes
• Cleanup to avifCodecVersions()
• Reorganize iccjpeg code back into its own files for licensing conveniences

0.7.1 - 2020-04-16

Changed

• avifenc: Set nclx/range values in avifImage earlier so proper YUV coefficients are used when converting JPEG/PNG

0.7.0 - 2020-04-16

Added

• avifenc and avifdec JPEG support
• Docker test script to build avifenc + deps in a shared libs (distro-like) env
• Added simple avifdump tool for aiding in AVIF debugging
• Added some comments in avif.h to clarify avifDecoderSetSource() usage

Changed

• avifRange cleanup/refactor (breaking change)
• avifenc now has -r to set YUV range (when using JPEG/PNG), --nclx now takes 3 arguments as a result

0.6.4 - 2020-04-14

Added

• Added avifDecoderNthImageTiming() for querying frame timing without needing to decode the frame
• Added some comments explaining avifDecoderSetSource()

Changed

• Fix clang warning (switch clamp to min)
• Fix a few clang analyzer issues
• Avoid incorrect YUV range cast
• Call dav1d_data_unref in dav1dCodecDestroyInternal (wantehchang)
• Declare some avifSampleTable * pointers as const (wantehchang)
• Update to cJSON v1.7.13 (wantehchang)
• Minor code cleanup

0.6.3 - 2020-03-30

Changed

• Avoid throwing away const unnecessarily in avifROStreamReadString()
• Re-enable a bunch of clang warnings
• Set dav1dSettings.frame_size_limit to avoid OOM (wantehchang)
• Refactor write.c to use a similar Data/Item design as read.c
• YUV to RGB optimizations

0.6.2 - 2020-03-11

Changed

• Fix 16bpc PNG output
• Compile fixes to avoid -Wclobbered in PNG code
• GitHub automatic deployment from AppVeyor (EwoutH)

0.6.1 - 2020-03-11

Added

• PNG support for avifenc/avifdec

Changed

• Fixed Clang10 build warning
• Fix SOVERSION in cmake (cryptomilk)
• Minor tweaks to avifBool usage (wantehchang)

0.6.0 - 2020-03-09

Added

• avifRGBImage structure and associated routines (BREAKING CHANGE)
• avifImage alphaRange support
• Support pasp, clap, irot, imir metadata for encode/decode

Changed

• Large RGB conversion refactor (BREAKING CHANGE), see README for new examples
• Minor fixes to make Clang 10 happy
• pkg-config fixes
• Lots of minor cleanup in code/CMake (wantehchang)
• Fix to NCLX color profile plumbing (ledyba-z)
• Cleanup unnecessary avifBool ternary expressions
• Update default dav1d version to 0.6.0
• Update default rav1e version to v0.3.1

0.5.7 - 2020-03-03

Added

• libgav1 decode codec support. (wantehchang @Google)
• Expose codec selection to avifdec/avifenc, speed to avifenc
• Image grid support (Summer_in_Tomsk_720p_5x4_grid)
• minQuantizerAlpha/maxQuantizerAlpha support in avifEncoder, avifenc
• 444alpha support in y4m layer (avifenc, avifdec)
• pkg-config support (cryptomilk)
• Proper support of NCLX matrix coefficients enum (link-u)

Changed

• AppVeyor builds now compile with dav1d (EwoutH)
• Lots of minor CMake/code cleanup (wantehchang @Google)
• cJSON license note for aviftest (wantehchang @Google)

0.5.6 - 2020-02-19

Added

• Added CMake Find modules for aom, dav1d, rav1e (cryptomilk)

Changed

• use right-most and bottom-most UV pixels in images with odd-dimensions (ledyba-z)
• avoid libaom crash when encoding >8bpc images at high speed

0.5.5 - 2020-02-13

Added

• Enable still picture mode with rav1e >= 0.3.0 (cryptomilk)
• Basic test suite (aviftest, rough draft)

Changed

• Explicitly cast unorms to float during YUV conversion, fixing clang warning
• Optimize SampleSizeBox parsing when sample_size>0, fixes OOM oss-fuzz issue #5192805347753984
• Fix memory leak when using avifDecoderReset(), fixes oss-fuzz issue #5770230506979328
• Update default rav1e version from 0.2.1 to 0.3.0
• Remove a null check for codec->internal->image (wantehchang)

0.5.4 - 2020-01-21

Changed

• Fix monochrome inputs on avifImageCopy. Monochrome still isn't really a first-class citizen in libavif, but this should at least honor the incoming data better.
• Updated README‘s Basic Decoding section reminding of avifDecoderRead’s tradeoffs
• build: avoid -ldl if not required or not supported (jbeich)
• apps: convert ADVANCE to an expression (jbeich)

0.5.3 - 2019-12-03

Added

• Honor CMake's builtin CMAKE_SKIP_INSTALL_RULES

Changed

• avifenc - Removed accidental double-delete of avifImage when failing to read a y4m file input
• Round dimensions down when decoding subsampled YUV with odd dimensions

0.5.2 - 2019-11-23

Changed

• Fix incorrect free in 0-case for avifRWDataSet()

0.5.1 - 2019-11-21

Changed

• Fix expectations for Exif payload to better match normal usage

0.5.0 - 2019-11-21

Added

• Define version and SO-version for shared library
• Use -DBUILD_SHARED_LIBS=OFF for building a static lib
• avifImage can now hold Exif and XMP metadata (avifImageSetMetadataExif, avifImageSetMetadataXMP)
• Support for reading/writing Exif and XMP items
• Now tracking idat boxes across meta boxes
• Support for iloc construction_method 1 (idat)

Changed

• Proper handling of the primary item box (pitm) on read
• avifROStreamReadString() now allows string skipping by passing a NULL output buffer
• Updated README to show Exif/XMP support

0.4.8 - 2019-11-19

Added

• avifEncoder now has a speed setting
• codec_aom only flushes encoder when necessary (avoids lost frame packets)
• shared library compilation (build shared by default, use -DAVIF_BUILD_STATIC=1 for static lib)
• make install support
• cmake fixes/support for find_package (cryptomilk)

Changed

• Updated libaom to more recent SHA in aom.cmd
• Tweaked AVIF_LOCAL_AOM settings to play nice with libaom‘s usage of CMake’s option()
• Remove all libaom special cases from libavif's CMakefiles, and have it work the same way dav1d and rav1e do
• Minor cleanup

0.4.7 - 2019-11-11

Changed

• Fix memory leak in rav1e codec (PR20, AurelC2G)
• Bump rav1e version in rav1e.cmd, implement avifCodecVersionRav1e()
• Display versions in avifenc and avifdec

0.4.6 - 2019-10-30

Changed

• Fix rav1e build on Linux x64, and eliminate pseudo-dependency on cargo-c

0.4.5 - 2019-10-30

Changed

• Fix rav1e codec's alpha encoding (monochrome asserts, might be unsupported still)

0.4.4 - 2019-10-30

Changed

• Fix QP range for rav1e encodes (rav1e uses [0-255], not [0-63])
• Distribute out and share code populating av01 config box across codecs

0.4.3 - 2019-10-28

Added

• rav1e codec support (encode-only)
• rav1e.cmd and dav1d.cmd to ext

Changed

• All codecs can coexist peacefully now, and can be queried for availability or specifically chosen at encode/decode time
• Updated README to indicate changes to CMake which facilitate codec reorg

0.4.2 - 2019-10-17

Changed

• Populate nclx box inside of OBU in addition to AVIF container

0.4.1 - 2019-10-17

Added

• Added containerDepth to avifDecoder for surfacing 10bpc/12bpc flags from av1C boxes, if present
• Added avifCodecVersions() for getting version strings of internal AV1 codecs

Changed

• Fixed warning with CHECK macro (additional semicolon)

0.4.0 - 2019-10-02

Added

• exposed util functions: avifFullToLimitedY, avifFullToLimitedUV, avifLimitedToFullY, avifLimitedToFullUV, avifPrepareReformatState

Changed

• Renamed ispeWidth/ispeHeight to containerWidth/containerHeight; they now can hold tkhd's width/height
• Split avifImageYUVToRGB into faster internal functions (estimated gain: 3.5x)
• Fixed a few memory leaks, one in the README, one in codec_dav1d (AurelC2G)

0.3.11 - 2019-09-26

Added

• Exposed ispeWidth/ispeHeight to decoder if decoding items with an associated ispe box
• Now parsing/tracking sample description formats to filter non-av01 type tracks
• Allow brand ‘av01’ to be decoded

Changed

• Fixed bug in sync sample table element sizing
• Pass through starting sample index to codec when flushing with NthImage

0.3.10 - 2019-09-26

Added

• stss box parsing for keyframe information
• avifBool avifDecoderIsKeyframe(avifDecoder * decoder, uint32_t frameIndex);
• uint32_t avifDecoderNearestKeyframe(avifDecoder * decoder, uint32_t frameIndex);
• avifResult avifDecoderNthImage(avifDecoder * decoder, uint32_t frameIndex);
• aviffuzz prints keyframe information as it repeatedly decodes

Changed

• internally renamed codec function “decode” to “open”, as that's all it does
• dav1d codec's open function no longer does an initial unnecessary feed
• avifCodecDecodeInput now stores an array of avifSample which know if they're keyframes
• moved codec flushing code into avifDecoderFlush() so it is available to avifDecoderNthImage
• ptsInTimescales is now calculated independently of frame decode order

0.3.9 - 2019-09-25

Changed

• Split avifRawData and avifStream into read-only (const) and read/write versions, updated code accordingly
• Fix a few clang/macOS warnings

0.3.8 - 2019-09-04

Changed

• Reverted codec_aom and libaom to use previous SHA (v1.0.0-errata1 is ancient)

0.3.7 - 2019-09-04 - DO NOT USE THIS VERSION

Added

• Check for proper width/height/depth when decoding alpha with dav1d, matching libaom's impl

Changed

• Updated codec_aom and libaom to use v1.0.0-errata1

0.3.6 - 2019-07-25

Added

• Exposed tile encoding to avifEncoder

0.3.5 - 2019-07-25

Changed

• Fixed copypasta bug in libaom encoding quantizer setup

0.3.4 - 2019-07-25

Added

• When the AVIF container does not contain a color profile, fallback to the color OBU's nclx

0.3.3 - 2019-07-24

Added

• new helper function avifPeekCompatibleFileType()
• expose ioStats on avifDecoder again (currently only interesting when reading items)

Changed

• Fixed some warnings (removed unused variables and a bad cast)
• Add a define in dav1d layer for supporting older dav1d codecs
• Enabled tons of warnings, and warnings-as-errors; Fixed associated fallout
• codec_dav1d: disambiguate “needs more data” and “no more frames” in feed data pump

0.3.2 - 2019-07-23

Added

• Added ext/aom.cmd to perform a local checkout of the aom codebase, as an alternative to a real submodule. This allows downstream projects to use libavif without recursive submodule issues.
• AppVeyor and Travis scripts now explicitly clone libaom into ext/ as an alternative to a submodule.

Changed

• Remove ext/aom as a submodule. If libavif users want to build aom from ext/, they must enable AVIF_BUILD_AOM and supply their own local copy.
• Move the handful of public domain gb_math functions used by colr.c and eliminate the dependence on the gb library
• Detect when libaom or libdav1d is being included by a parent CMake project and allow it
• Offer libavif's include dir alongside the library in CMake (target_include_directories)

0.3.1 - 2019-07-22

Changed

• Moved dependency on libm to avif executables, instead of directly on the library
• Minor changes to README examples

0.3.0 - 2019-07-22

Added

• new CMake option AVIF_CODEC_AOM to enable/disable the usage of AOM's codec (default: on)
• new CMake option AVIF_CODEC_DAV1D to enable/disable the usage of dav1d's codec (default: off)
• codec_dav1d.c, which provides decoding via libdav1d
• fuzz.sh which builds with afl-clang and runs afl-fuzz
• aviffuzz tool, used in fuzzing script
• fuzz inputs made with colorist
• .clang-format file
• avifArray*() functions for basic dynamic arrays when parsing
• moov box parsing
• now reads ‘avis’ brands
• Split avifDecoderRead() into components for image sequences:
  • avifDecoderSetSource()
  • avifDecoderParse()
  • avifDecoderNextImage()
  • avifImageCopy()
  • avifDecoderReset()
• Added decoder and image timings for image sequences

Changed

• Reorganized internal struct avifCodec to accomodate multiple codecs simultaneously (compile time; not exposed to API)
• Fix some compiler warnings
• Sanity check offsets and sizes in items table before using
• Bail out of box header advertises an impossible size
• Ran clang-format on all of src and include
• Fix copypasta leading to a memory leak in RGB planes
• Switched items and properties during parse to use dynamic arrays
• Refactored codec API to not require each codec to maintain per-plane decoder instances
• avifImage can now “not own” its planes and directly point at decoder planes to avoid copies
• aviffuzz attempts to decode all images in source material twice (using avifDecoderReset())
• Switch decoder->quality to explicit [minQuantizer, maxQuantizer], update assoc. constants
• Add examples to README

0.2.0 - 2019-06-12

Added

• Added avifEncoder and avifDecoder to match avifImage's pattern and allow for easier future parameterization

Changed

• Renamed project in cmake to libavif to match new official repo naming
• Updated appveyor script to use libavif
• Updated examples and apps to use new encoder/decoder pattern

0.1.4 - 2019-06-11

Added

• avifPixelFormatToString() convenience function for debugging/printing
• avifenc and avifdec “apps” which show basic bidirectional conversion to y4m

Changed

• Make calling avifImageYUVToRGB() upon reading an avif optional
• Moved ext/aom submodule to use official remote
• Update ext/aom submodule to commit 38711e7fe

Removed

• Remove all calls to convertXYZToXYY() as they were all unnecessary

0.1.3 - 2019-04-23

Changed

• ftyp - Change major_brand to avif
• ftyp - Reorder compatible_brands, add MA1A or MA1B when appropriate
• Write meta box before mdat box for streaming friendliness

0.1.2 - 2019-04-18

Added

• AVIF_NCLX_COLOUR_PRIMARIES_P3 (convenient mirrored value)
• avifNclxColourPrimariesFind() - Finds a builtin avifNclxColourPrimaries and name by a set of primaries

Changed

• Fixed enum name copypasta for AVIF_NCLX_COLOUR_PRIMARIES_EG432_1
• Fix UV limited ranges when doing full<->limited range conversion

0.1.1 - 2019-04-15

Added

• Added appveyor.yml (exported from Appveyor)
• Move ext/aom to a proper submodule
• Update AOM to commit 3e3b9342a with minor CMake changes

Changed

• Added static library artifact zip to Windows x64 builds (Appveyor)
• Updated README to explain libavif's goals and a little more build info
• Fix clang warning in avifVersion() signature

0.1.0 - 2019-04-12

Added

• First version. Plenty of bugfixes and features await!
• ext/aom based off AOM commit 3563b12b with minor CMake changes
• An interest and willingness to maintain this file.
• Constants AVIF_VERSION, AVIF_VERSION_MAJOR, AVIF_VERSION_MINOR, AVIF_VERSION_PATCH
• avifVersion() function