1. 06 Nov, 2012 1 commit
    • Yaowu Xu's avatar
      silent a lot of MSVC compiler warnings · 8a336b0d
      Yaowu Xu authored
      there are still a couple type of warning left, which are related to
      double constants assigned to float type. As those would be addressed
      by the conversion of transforms into integer version. This commit
      has left those un-dealt with.
      
      Change-Id: I48fd9b489c0c27ad6b543f4177423419f929f2bb
      8a336b0d
  2. 02 Nov, 2012 2 commits
  3. 01 Nov, 2012 3 commits
  4. 31 Oct, 2012 4 commits
  5. 30 Oct, 2012 1 commit
  6. 22 Oct, 2012 2 commits
  7. 17 Oct, 2012 1 commit
  8. 15 Oct, 2012 1 commit
    • Ronald S. Bultje's avatar
      Remove duplicate or unused code in encoder/encodemb.c. · 238ed517
      Ronald S. Bultje authored
      Also make some minor stylistic changes to bring the code closer to
      the style guide. Remove distinction between inter and intra transform
      functions, since both do exactly the same thing except for the check
      against SPLITMV for the second-order transform. Remove some commented
      out debug code. Remove 8x8/16x16 transform code in encode_inter16x16y(),
      since the first-pass only uses 4x4 anyway.
      
      Change-Id: Ife54816ff759825b9141f95dc2ba43c253c14dba
      238ed517
  9. 10 Oct, 2012 1 commit
    • Jim Bankoski's avatar
      convert copy16x16 to rtcd · 89f060e8
      Jim Bankoski authored
      Convert copy16x16 from invoke to rtcd.  The first in a long
      string of converts.
      
      Change-Id: I296b0aa32f40e9fb649f7a3cb914a4e5300cad63
      89f060e8
  10. 06 Sep, 2012 1 commit
    • Deb Mukherjee's avatar
      New motion vector entropy coding · 00f9eb65
      Deb Mukherjee authored
      Adds a new experiment with redesigned/refactored motion vector entropy
      coding. The patch also takes a first step towards separating the
      integer and fractional pel components of a MV. However the fractional
      pel encoding still depends on the integer pel part and so they are
      not fully independent. Further experiments are in progress to see
      how much they can be decoupled without affecting performance.
      All components including entropy coding/decoding, costing for MV
      search, forward updates and backward updates to probability tables,
      have been implemented.
      
      Results so far:
      derf: +0.19%
      std-hd: +0.28%
      yt: +0.80%
      hd: +1.15%
      
      Patch: Simplifies the fractional pel models:
      derf: +0.284%
      std-hd: +0.289%
      yt: +0.849%
      hd: +1.254%
      
      Patch: Some changes in the models, rebased.
      derf: +0.330%
      std-hd: +0.306%
      yt: +0.816%
      hd: +1.225%
      
      Change-Id: I646b3c48f3587f4cc909639b78c3798da6402678
      00f9eb65
  11. 14 Aug, 2012 1 commit
  12. 13 Aug, 2012 1 commit
  13. 03 Aug, 2012 1 commit
    • Deb Mukherjee's avatar
      Merging in high_precision_mv experiment · 2af5473a
      Deb Mukherjee authored
      Merged in the high_precision_mv experiment to make it easier
      to work on new mv encoding strategies. Also removed
      coef_update_probs3().
      
      Change-Id: I82d3b0bb642419fe05dba82528bc9ba010e90924
      2af5473a
  14. 17 Jul, 2012 1 commit
  15. 19 Jun, 2012 1 commit
  16. 12 Jun, 2012 1 commit
    • Paul Wilkins's avatar
      Merge of further two pass rc clean up and adjustments. · 7eb66d82
      Paul Wilkins authored
      Changes to calculation of  sr_coded_error to include 0,0 case.
      
      Experimental use of sr_coded_error in calculating correction factor
      for estimating the allowable Q range.
      
      Reinstated some code needed for calculating section_intra_rating.
      
      Add flash detection in calculation of KF boost
      
      Increased tolerance in testing candidate key frames (needed with
      longer motion search as this tends to slightly increase inter %.
      
      Zbin changes for 8x8.
      
      Other minor adjustments, refactoring and bug fixes.
      
      Reinstated some motion break out clauses in boost loop
      as their removal hurt a few 50fps  clips badly in the std set.
      It may be possible to remove them again later if a better way
      can be found of preventing overly long gf intervals.
      
      Change-Id: Iee686d0c31072828bb1ccd2bc63f5f1c7c548ea2
      7eb66d82
  17. 08 Jun, 2012 1 commit
    • Paul Wilkins's avatar
      Key frame and GF sizing changes. · 0cb4985b
      Paul Wilkins authored
      Changes to the equations for kf and gf minQ and to
      the boost calculations for kg and gf
      
      Change-Id: I312031c910e6a575334f49075c32f49a8dfff239
      0cb4985b
  18. 30 May, 2012 1 commit
    • Paul Wilkins's avatar
      Rate control fix. · b8c36905
      Paul Wilkins authored
      This fix addresses some problems with very complex clips like
      handling of flashes on clips like crew (which was made worse
      by an earlier patch (derf and std-hd)).
      
      Most clips a small effect but some between 1 & 2%
      
      Derf +0.039, +0.211%
      YT +0.042, +0.083%
      
      Change-Id: I65fc7c13afc31482040068544dd65b8808f5cb4a
      b8c36905
  19. 29 May, 2012 1 commit
    • Paul Wilkins's avatar
      Remove "est_max_qcorrection_factor" · f66747fe
      Paul Wilkins authored
      Removed the local scaling factor est_max_qcorrection_factor
      and related code to simplify estimateq calculation (little effect
      anyway)
      
      Cap range of total correction factor.
      
      Slight change to break out case to turn off arf.
      
      Change-Id: I748187737ba93cfadf016f3dfdf8d2741934067f
      f66747fe
  20. 17 May, 2012 1 commit
    • Paul Wilkins's avatar
      Experimental change to two pass prediction decay calculation. · f63894f6
      Paul Wilkins authored
      Remove dependency on amount and speed of motion as this
      may not behave well across different image sizes.
      
      Tweak impact of % inter.
      
      Add in experimental adjustment based on relative quality of an
      older second reference frame.
      
      Cap range of decay values allowed.
      
      Some small + effect on derf but -ve on yt & hd at this stage.
      
      Change-Id: I390d6f6ebe67a2eb0b834980d0d4650124980d3e
      f63894f6
  21. 15 May, 2012 3 commits
    • Paul Wilkins's avatar
      Further firstpass.c changes. · acf3c729
      Paul Wilkins authored
      base the static image test off a measure of 0,0 motion
      instead of the decay accumulator value.
      
      Change "transition to still detection" to compare the
      decay rate from successive frames.
      
      Minor tweak to the arf extra boost given based on the
      number of frames affected.
      
      Removed unused variable mod_err_per_mb_accumulator.
      
      Change-Id: Idd8360083ad409e45f133ce97dd2488259003e64
      acf3c729
    • Paul Wilkins's avatar
      Move / re-factor some of boost calculation code. · ae989ae8
      Paul Wilkins authored
      Some marginal impact due to the fact that it makes use of
      arf more likely / stable even in hard sections.
      
      Change-Id: Ic72fda0f63eefc9433914b5d9cd374d515810129
      ae989ae8
    • Paul Wilkins's avatar
      Firstpass.c refactoring · 0529320a
      Paul Wilkins authored
      Removed unused function.
      
      Added tentative code to take error score of an older frame
      into account when calculating Q range. However, for now
      it is disabled pending merging other changes and testing.
      
      Change-Id: Ie89955e70319dac31b79e3b833e3352712a061ec
      0529320a
  22. 14 May, 2012 2 commits
    • Paul Wilkins's avatar
      Two pass refactoring continued. · e237fd7c
      Paul Wilkins authored
      Remove testing of whether we estimate that it will be possible
      to code an arf at a lower Q than the ambient Q.  This adds quite
      a bit of extra code and complexity for marginal gain.
      
      Factored out some code relating to ARNR selection to a separate
      function as this is likely to be changed / simplified soon.
      
      Change-Id: Ia1cf060405637ef5bbf7018355437be21d12375f
      e237fd7c
    • Paul Wilkins's avatar
      Two pass rc refactoring. · 59a5c7d5
      Paul Wilkins authored
      Removed odd *100 >> 4 factor from boost calculations. Not all the
      calculations exactly match what was there before so there may be
      some minor impact on results.
      
      Some other minor tidying up in regard to coding conventions.
      
      The specific values of factors and thresholds will likely change as
      part of subsequent patches.
      
      Change-Id: Id976321484ac02ba50294cf54fafbc17dda85686
      59a5c7d5
  23. 11 May, 2012 1 commit
    • Paul Wilkins's avatar
      First pass overhaul preparatory change. · 35358320
      Paul Wilkins authored
      This is the first patch in a series of changes to the first
      pass code. (Broken down for ease of testing/merging/review).
      
      This patch introduces a new stats element "sr_coded_error".
      This is the coded error recorded vs the second reference
      frame (which is updated such that it lags by at least one frame).
      No use is made of the new structure in this change so this patch
      should have no material effect.
      
      Removed some ifdefs and deprecated code (#if NEW_BOOST).
      Removed twopass.gf_decay_rate (not used any more)
      
      Change-Id: I1be672a73017f7c13fd50fb4f99236aa2ed30916
      35358320
  24. 18 Apr, 2012 1 commit
  25. 12 Apr, 2012 1 commit
    • Yaowu Xu's avatar
      Adjust the key frame placement condition · d6f4b71d
      Yaowu Xu authored
      The commit removed a limit on key frame detection, which caused a big
      drop in all metric measurements for standard HD clip such as _mobcal.
      
      This single change helps two standard HD clips by a huge amount, which
      help the overall std-hd set by 2.4% (glb psnr), 0.9% (avg_psnr), 2.1%
      (vpxssim).
      
      In the result page:
      http://pafr9.prod.google.com:26163/?/cns/rc-d/home/on2-prod/sunkaras/borg-test/yaowu
      
      2012_04_02_1649_yaowu_bugfix_std-hd
      2012_04_03_1452_yaowu_hump_std-hd
      represent the encoding test results and std-hd set prior and after this
      commit respectively.
      
      Change-Id: Ie4313e317c737ea0e699c3a7919c1376744baa1a
      d6f4b71d
  26. 11 Apr, 2012 2 commits
    • Paul Wilkins's avatar
      Refactoring of encode loop and bitstream packing · 13c6d1a8
      Paul Wilkins authored
      Some code re-factored / moved to allow the main
      pack operation inside the recode loop so  that the
      size estimate is accurate.
      
      Deletion of some redundant code relating to one pass.
      
      Aproximate improvement over March 27 code base:
      Derf 0.0%, YT 0.5%, YThd 0.3% Std_hd 0.25%
      
      Change-Id: Id2d071794ab44f0b52935f6fcdb5733d09a6bb86
      13c6d1a8
    • Adrian Grange's avatar
      Superblock encoding order · 9daf3154
      Adrian Grange authored
      This is the first patch to add superblock (32x32) coding
      order capabilities. It does not yet do any mode selection
      at the SB level, that will follow in a further patch.
      
      This patch encodes rows of SBs rather than
      MBs, each SB contains 2x2 MBs.
      
      Two intra prediction modes have been disabled since they
      require reconstructed data for the above-right MB which
      may not have been encoded yet (e.g. for the bottom right
      MB in each SB).
      
      Results on the one test clip I have tried (720p GIPS clip)
      suggest that it is somewhere around 0.2dB worse than the
      baseline version, so there may be bugs.
      
      It has been tested with no experiments enabled and with
      the following 3 experiments enabled:
        --enable-enhanced_interp
        --enable-high_precision_mv
        --enable-sixteenth_subpel_uv
      in each case the decode buffer matches the recon buffer
      (using "cmp" to compare the dumped/decoded frames).
      Note: Testing these experiments individually created
      errors.
      
      Some problems were found with other experiments but it
      is unclear what state these experiments are in:
        --enable-comp_intra_pred
        --enable-newentropy
        --enable-uvintra
      
      This code has not been extensively tested yet, so there
      is every likelihood that further bugs remain. I also
      intend to do some code cleanup & refactoring in tandem
      with the next patch that adds the 32x32 modes.
      
      Change-Id: I1eba7f740a70b3510df58db53464535ef881b4d9
      9daf3154
  27. 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
  28. 05 Mar, 2012 1 commit
  29. 01 Mar, 2012 1 commit