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