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 libteora 1.2.0alpha1 (2010 September 23)

 - New 'ptalarbvorm' encoder with better rate/distortion optimization

 - New th_encode_ctl option for copying configuration from an existing

   setup header, useful for splicing streams.

 - Returns TH_DUPFRAME in more cases.

 - Add ARM optimizations

 - Add TI C64x+ DSP optimizations

 - Other performance improvements

 - Rename speedlevel 2 to 3 and provide a new speedlevel 2

 - Various minor bug fixes

 libtheora 1.1.2 (unreleased snapshot)

  - Fix Huffman table decoding with OC_HUFF_SLUSH is set to 0

  - Fix a frame size bug in player_example

  - Add support for passing a buffer the size of the picture

    region, rather than a full padded frame to th_encode_ycbcr_in()

    as was possible with the legacy pre-1.0 API.

  - 4:4:4 support in player_example using software yuv->rgb

  - Better rgb->yuv conversion in png2theora

  - Clean up warnings and local variables

  - Build and documentation fixes

 libtheora 1.1.1 (2009 October 1)

  - Fix problems with MSVC inline assembly

  - Add the missing encoder_disabled.c to the distribution

  - build updates: autogen.sh should work better after switching systems

    and the MSVC project now defaults to the dynamic runtime library

  - Namespace some variables to avoid conflicts on wince.

 libtheora 1.1.0 (2009 September 24)

  - Fix various small issues with the example and telemetry code

  - Fix handing a zero-byte packet as the first frame

  - Documentation cleanup

  - Two minor build fixes

 libtheora 1.1beta3 (2009 August 22)

  - Rate control fixes to smooth quality

  - MSVC build now exports all of the 1.0 api

  - Assorted small bug fixes

 libtheora 1.1beta2 (2009 August 12)

  - Fix a rate control problem with difficult input

  - Build fixes for OpenBSD and Apple Xcode

  - Examples now all use the 1.0 api

  - TH_ENCCTL_SET_SPLEVEL works again

  - Various bug fixes and source tree rearrangement

 libtheora 1.1beta1 (2009 August 5)

  - Support for two-pass encoding

  - Performance optimization of both encoder and decoder

  - Encoder supports dynamic adjustment of quality and 

    bitrate targets

  - Encoder is generally more configurable, and all

    rate control modes perform better

  - Encoder now accepts 4:2:2 and 4:4:4 chroma sampling

  - Decoder telemetry output shows quantization choice

    and a breakdown of bitrate usage in the frame

  - MSVC assembly optimizations up to date and functional

 libtheora 1.1alpha2 (2009 May 26)

  - Reduce lambda for small quantizers.

  - New encoder fDCT does better on smooth gradients

  - Use SATD for mode decisions (1-2% bitrate reduction)

  - Assembly rewrite for new features and general speed up

  - Share code between the encoder and decoder for performance

  - Fix 4:2:2 decoding and telemetry

  - MSVC project files updated, but assembly is disabled.

  - New configure option --disable-spec to work around toolchain

    detection failures.

  - Limit symbol exports on MacOS X.

  - Port remaining unit tests from the 1.0 release.

 libtheora 1.1alpha1 (2009 March 27)

  - Encoder rewrite with much improved vbr quality/bitrate and

    better tracking of the target rate in cbr mode.

  - MSVC project files do not work in this release.

 libtheora 1.0 (2008 November 3)

  - Merge x86 assembly for forward DCT from Thusnelda branch.

  - Update 32 bit MMX with loop filter fix.

  - Check for an uninitialized state before dereferencing in propagating

    decode calls.

  - Remove all TH_DEBUG statements.

  - Rename the bitpacker source files copied from libogg to avoid

    confusing simple build systems using both libraries.

  - Declare bitfield entries to be explicitly signed for Solaris cc.

  - Set quantization parameters to default values when an empty buffer is

    passed with TH_ENCCTL_SET_QUANT_PARAMS.

  - Split encoder and decoder tests depending on configure settings.

  - Return lstylex.sty to the distribution.

  - Disable inline assembly on gcc versions prior to 3.1.

  - Remove extern references for OC_*_QUANT_MIN.

  - Make various data tables static const so they can be read-only.

  - Remove ENCCTL codes from the old encoder API.

  - Implement TH_ENCCTL_SET_KEYFRAME_FREQUENCY_FORCE ctl.

  - Fix segfault when exactly one of the width or height is not a multiple

    of 16, but the other is.

  - Compute the correct vertical offset for chroma.

  - cpuid assembly fix for MSVC.

  - Add VS2008 project files.

  - Build updates for 64-bit platforms, Mingw32, VS and XCode.

  - Do not clobber the cropping rectangle.

  - Declare ourselves 1.0final to pkg-config to sort after beta releases.

  - Fix the scons build to include asm in libtheoradec/enc.

 libtheora 1.0beta3 (2008 April 16)

  - Build new libtheoradec and libtheoraenc libraries

    supporting the new API from theora-exp. This API should

    not be considered stable yet.

  - Change granule_frame() to return an index as documented.

    This is a change of behaviour from 1.0beta1.

  - Document that granule_time() returns the end of the

    presentation interval.

  - Use a custom copy of the libogg bitpacker in the decoder

    to avoid function call overhead.

  - MMX code improved and ported to MSVC.

  - Fix a problem with the MMX code on SELinux.

  - Fix a problem with decoder quantizer initialization.

  - Fix a page queue problem with png2theora.

  - Improved robustness.

  - Updated VS2005 project files.

  - Dropped build support for Microsoft VS2003.

  - Dropped build support for the unreleased libogg2.

  - Added the specification to the autotools build.

  - Specification corrections.

 libtheora 1.0beta2 (2007 October 12)

  - Fix a crash bug on char-is-unsigned architectures (PowerPC)

  - Fix a buffer sizing issue that caused rare encoder crashes

  - Fix a buffer alignment issue

  - Build fixes for MingW32, MSVC

  - Improved format documentation.

 libtheora 1.0beta1 (2007 September 22)

  - Granulepos scheme modified to match other codecs. This bumps

    the bitstream revision to 3.2.1. Bitstreams marked 3.2.0 are

    handled correctly by this decoder. Older decoders will show

    a one frame sync error in the less noticeable direction.

 libtheora 1.0alpha8 (2007 September 18)

  - Switch to new spec compliant decoder from theora-exp branch.

    Written by Dr. Timothy Terriberry.

  - Add support to the encoder for using quantization settings

    provided by the application.

  - more assembly optimizations

 libtheora 1.0alpha7 (2006 June 20)

  - Enable mmx assembly by default

  - Avoid some relocations that caused problems on SELinux

  - Other build fixes

  - time testing mode (-f) for the dump_video example

 libtheora 1.0alpha6 (2006 May 30)

  * Merge theora-mmx simd acceleration (x86_32 and x86_64)

  * Major RTP payload specification update

  * Minor format specification updates

  * Fix some spurious calls to free() instead of _ogg_free()

  * Fix invalid array indexing in PixelLineSearch()

  * Improve robustness against invalid input

  * General warning cleanup

  * The offset_y member now means what every application thought it meant

    (offset from the top). This will mean some old files (those with a 

    non-centered image created with a buggy encoder) will display differently.

 libtheora 1.0alpha5 (2005 August 20)

  * Fixed bitrate management bugs that caused popping and encode

    errors

  * Fixed a crash problem with the theora_state internals not

    being intialized properly.

  * new utility function:

    - theora_granule_shift()

  * dump_video example now makes YUV4MPEG files by default, so

    the results can be fed back to encoder_example and similar

    tools. The old behavior is restored through the '-r' switch.

  * ./configure now prints a summary

  * simple unit test of the comment api under 'make check'

  * misc code cleanup, warning and leak fixes

 libtheora 1.0alpha4 (2004 December 15)

  * first draft of the Theora I Format Specification

  * API documentation generated from theora.h with Doxygen

  * fix a double-update bug in the motion analysis

  * apply the loop filter before filling motion vector border 

    in the reference frame

  * new utility functions:

    - theora_packet_isheader(),

    - theora_packet_iskeyframe()

    - theora_granule_frame()

  * optional support for building without floating point

  * optional support for building without encode support 

  * various build and packaging fixes

  * pkg-config support

  * SymbianOS build support

 libtheora 1.0alpha3 (2004 March 20)

  UPDATE: on 2004 July 1 the Theora I bitstream format was frozen. Files

  produced by the libtheora 1.0alpha3 reference encoder will always be

  decodable by the Theora I spec.

  * Bitstream info header FORMAT CHANGES:

    - move the granulepos shift field to maintain byte alignment longer.

    - reserve 5 additional bits for subsampling and interlace flags.

  * Bitstream setup header FORMAT CHANGES:

    - support for a range of interpolated quant matricies.

    - include the in-loop block filter coeff.

  * Bitsteam data packet FORMAT CHANGES:

    - Reserve a bit for per-block Q index selection.

    - Flip the coded image orientation for compatibility with VP3.

      This allows lossless transcoding of VP3 content, but files

      encoded with earlier theora releases would play upside down.

  * example VP3 lossless transcoder

  * optional support for libogg2

  * timing improvements in the example player

  * packaging and build system updates and fixes

 libtheora 1.0alpha2 (2003 June 9)

  * bitstream FORMAT CHANGES:

    - store the quant tables in a third setup header for

      future encoder flexibility

    - store the huffman tables in the third setup header

    - add a field for marking the colorspace to the info header

    - add crop parameters for non-multiple-of-16 frame sizes

    - add a second vorbiscomment-style metadata header

  * API changes to handle multiple headers with a single 

    theora_decode_header() call, like libvorbis

  * code cleanup and minor fixes

  * new dump_video code example/utility

  * experimental win32 code examples

 libtheora 1.0alpha1 (2002 September 25)

  * First release of the theora reference implementation

  * Port of the newly opened VP3 code to the Ogg container

  * Rewrite of the code for portability and to use the libogg bitpacker