1. 30 Nov, 2012 1 commit
  2. 28 Nov, 2012 1 commit
  3. 27 Nov, 2012 1 commit
    • John Koleszar's avatar
      Add vp9_ prefix to all vp9 files · fcccbcbb
      John Koleszar authored
      Support for gyp which doesn't support multiple objects in the same
      static library having the same basename.
      
      Change-Id: Ib947eefbaf68f8b177a796d23f875ccdfa6bc9dc
      fcccbcbb
  4. 01 Nov, 2012 1 commit
  5. 31 Oct, 2012 3 commits
  6. 30 Oct, 2012 1 commit
  7. 17 Jul, 2012 1 commit
  8. 15 Mar, 2012 1 commit
    • Yaowu Xu's avatar
      WebM Experimental Codec Branch Snapshot · 6035da54
      Yaowu Xu authored
      This is a code snapshot of experimental work currently ongoing for a
      next-generation codec.
      
      The codebase has been cut down considerably from the libvpx baseline.
      For example, we are currently only supporting VBR 2-pass rate control
      and have removed most of the code relating to coding speed, threading,
      error resilience, partitions and various other features.  This is in
      part to make the codebase easier to work on and experiment with, but
      also because we want to have an open discussion about how the bitstream
      will be structured and partitioned and not have that conversation
      constrained by past work.
      
      Our basic working pattern has been to initially encapsulate experiments
      using configure options linked to #IF CONFIG_XXX statements in the
      code. Once experiments have matured and we are reasonably happy that
      they give benefit and can be merged without breaking other experiments,
      we remove the conditional compile statements and merge them in.
      
      Current changes include:
      * Temporal coding experiment for segments (though still only 4 max, it
        will likely be increased).
      * Segment feature experiment - to allow various bits of information to
        be coded at the segment level. Features tested so far include mode
        and reference frame information, limiting end of block offset and
        transform size, alongside Q and loop filter parameters, but this set
        is very fluid.
      * Support for 8x8 transform - 8x8 dct with 2nd order 2x2 haar is used
        in MBs using 16x16 prediction modes within inter frames.
      * Compound prediction (combination of signals from existing predictors
        to create a new predictor).
      * 8 tap interpolation filters and 1/8th pel motion vectors.
      * Loop filter modifications.
      * Various entropy modifications and changes to how entropy contexts and
        updates are handled.
      * Extended quantizer range matched to transform precision improvements.
      
      There are also ongoing further experiments that we hope to merge in the
      near future: For example, coding of motion and other aspects of the
      prediction signal to better support larger image formats, use of larger
      block sizes (e.g. 32x32 and up) and lossless non-transform based coding
      options (especially for key frames). It is our hope that we will be
      able to make regular updates and we will warmly welcome community
      contributions.
      
      Please be warned that, at this stage, the codebase is currently slower
      than VP8 stable branch as most new code has not been optimized, and
      even the 'C' has been deliberately written to be simple and obvious,
      not fast.
      
      The following graphs have the initial test results, numbers in the
      tables measure the compression improvement in terms of percentage. The
      build has  the following optional experiments configured:
      --enable-experimental --enable-enhanced_interp --enable-uvintra
      --enable-high_precision_mv --enable-sixteenth_subpel_uv
      
      CIF Size clips:
      http://getwebm.org/tmp/cif/
      HD size clips:
      http://getwebm.org/tmp/hd/
      (stable_20120309 represents encoding results of WebM master branch
      build as of commit#7a159071)
      
      They were encoded using the following encode parameters:
      --good --cpu-used=0 -t 0 --lag-in-frames=25 --min-q=0 --max-q=63
      --end-usage=0 --auto-alt-ref=1 -p 2 --pass=2 --kf-max-dist=9999
      --kf-min-dist=0 --drop-frame=0 --static-thresh=0 --bias-pct=50
      --minsection-pct=0 --maxsection-pct=800 --sharpness=0
      --arnr-maxframes=7 --arnr-strength=3(for HD,6 for CIF)
      --arnr-type=3
      
      Change-Id: I5c62ed09cfff5815a2bb34e7820d6a810c23183c
      6035da54
  9. 15 Nov, 2011 2 commits
    • Paul Wilkins's avatar
      Merge CONFIGURE_SEGMENTATION experiment. · 3cdfdb55
      Paul Wilkins authored
      Removal of CONFIGURE_SEGMENTATION ifdefs.
      
      Removal of legacy support code fo the old coding mechanism.
      
      Use local reference "xd" for MACROBLOCKD structure in
      encode_frame_to_data_rate()
      
      Moved call to choose_segmap_coding_method() out of encode
      loop as the cost of segmentation is not properly accounted
      in the loop anyway. If this is desirable in the future it
      can be moved back. The use of this function to do all the
      analysis and set the probabilities also removes the need
      to track segment useage in threading code.
      
      Change-Id: I85bc8fd63440e7176c73d26cb742698f9b70cade
      3cdfdb55
    • Paul Wilkins's avatar
      Further work on Segmentation Experiment: · 661b2c2d
      Paul Wilkins authored
      This check in includes quite a lot of clean up and refactoring.
      
      Most of the analysis and set up for the different coding options for the
      segment map (currently simple distribution based coding or temporaly
      predicted coding), has been moved to one location (the function
      choose_segmap_coding_method() in segmenation.c). This code was previously
      scattered around in various locations making integration with other
      experiments and modification / debug more difficult.
      
      Currently the functionality is as it was with the exception that the
      prediction probabilities are now only transmitted when the temporal
      prediction mode is selected.
      
      There is still quite a bit more clean up work that will be possible
      when the #ifdef is removed. Also at that time I may rename and alter
      the sense of macroblock based variable "segment_flag" which indicates
      (1 that the segmnet id is not predicted vs 0 that it is predicted).
      
      I also intend to experiment with a spatial prediction mode that can be
      used when coding a key frame segment map or in cases where temporal
      prediction does not work well but there is spatial correlation.
      
      In a later check in when the ifdefs have gone I may also move the call
      to choose_segmap_coding_method() to just before where the bitsream is
      packed (currently it is in vp8_encode_frame()) to further reduce the
      possibility of clashes with other experiments and prevent it being called
      on each itteration of the recode loop.
      
      Change-Id: I3d4aba2a2826ec21f367678d5b07c1d1c36db168
      661b2c2d
  10. 11 Nov, 2011 1 commit
    • Paul Wilkins's avatar
      SEGMENTATION experiment: · bf25d4ad
      Paul Wilkins authored
      Some initial cleanup to aid testing and debug.
      
      Pull code to choose temporal or spatial encoding
      out of encodeframe.c into a dedicated function
      in segmentation.c.
      
      For now disable broken temporal mode.
      
      Move the coding of "temporal_update" flag and
      only transmit if segment map update is indicated.
      
      Rename the functions read_mb_features() and
      write_mb_features() to read_mb_segid() and
      read_mb_segid() as they only read and write
      the macroblock segment id not any of the
      features.
      
      Change-Id: Ib75118520b1144c24d35fdfc6ce46106803cabcf
      bf25d4ad
  11. 24 Oct, 2011 1 commit
    • Paul Wilkins's avatar
      Further segment feature extensions. · 01ce04bc
      Paul Wilkins authored
      This quite large check in includes the following:
      
      Merge in some code from Ronald (mbgraph.c) that scans a Gf/arf group.
      This is used as a basis for a simple segmentation for the normal frames
      in a gf/arf group. This code also uses satd functions from Yaowu.
      
      Adds functionality for coding the latest possible position of an EOB for
      blocks in the segment. (Currently 0-15 only, hence just for 4x4 dct).
      Where the EOB position is 0 this acts like "skip" and the normal coding
      of skip at the per mb level is disabled.
      
      Added functions (seg_common.c) for setting and reading segment feature
      elements. These may want to be optimized away at some point but while the
      mecahnism is in a state of flux they provide a single location for making
      changes and keep things a bit cleaner.
      
      This is still proof of concept code. Currently the tested feature set:-
      
      Quantizer,
      Loop Filter level,
      Reference frame,
      Prediction Mode,
      EOB end stop.
      
      TBD:-
      
      Add functions for setting and reading the feature data with range
      and validity checking.
      
      Handling of signed and unsigned feature data. At the moment all is assumed
      to be signed and a sign bit is coded but many cannot be negative.
      
      Correct handling of EOB feature with intra coded blocks.
      
      Testing/trapping of legal/illegal ref frame and mode combinations.
      
      Transform size switch plus merge and test with 8c8 DCT work
      
      Merge and test with Sumans Segmenation coding optimizations
      
      Change-Id: Iee12e83661c7abbd1e0ce6810915eb4ec35e2d8e
      01ce04bc
  12. 10 Feb, 2011 1 commit
    • John Koleszar's avatar
      Fix relative include paths · 02321de0
      John Koleszar authored
      Allow compiling without adding vp8/{common,encoder,decoder} to the
      include paths.
      
      Change-Id: Ifeb5dac351cdfadcd659736f5158b315a0030b6c
      02321de0
  13. 09 Sep, 2010 1 commit
  14. 13 Aug, 2010 1 commit
    • John Koleszar's avatar
      move segmentation_common to encoder · 80d3923a
      John Koleszar authored
      vp8_update_gf_useage_maps() is only used by the encoder. This patch
      fixes the ability to build in decode-only or encode-only
      configurations.
      
      Change-Id: I3a5211428e539886ba998e09e8abd747ac55c9aa
      80d3923a
  15. 11 Aug, 2010 1 commit
  16. 18 Jun, 2010 1 commit
    • John Koleszar's avatar
      cosmetics: trim trailing whitespace · 94c52e4d
      John Koleszar authored
      When the license headers were updated, they accidentally contained
      trailing whitespace, so unfortunately we have to touch all the files
      again.
      
      Change-Id: I236c05fade06589e417179c0444cb39b09e4200d
      94c52e4d
  17. 04 Jun, 2010 1 commit
  18. 18 May, 2010 1 commit