1. 01 Feb, 2012 1 commit
  2. 31 Jan, 2012 8 commits
  3. 30 Jan, 2012 1 commit
  4. 27 Jan, 2012 3 commits
  5. 26 Jan, 2012 2 commits
  6. 24 Jan, 2012 2 commits
    • Yaowu Xu's avatar
    • Jim Bankoski's avatar
      vpn common -> implicit segmentation · 91325b8f
      Jim Bankoski authored
      This introduces base functions for introducing implicit segmentation.
      The code that actually stores the results to the segment map isn't
      here yet.   This just prints out the segmentation map results
      if you call it.
      
      Uses connected component labeling technique on mbmi info so that only
      if 2 mbs are horizontally or vertically touching do they get the same
      segment.
      
      vp8next - plumbing for rotation
      
      code to produce taps for rotation ( tapify. py ),  code
      for predicting using rotation ( predict_rotated.c ) ,  code
      for finding the best rotation find_rotation.c.
      
      didn't checkin code that uses this in the codec.   still work
      in progress.
      
      Fixed copyright notice
      
      Change-Id: I450c13cfa41ab2fcb699f3897760370b4935fdf8
      91325b8f
  7. 20 Jan, 2012 3 commits
    • Yaowu Xu's avatar
      changed loop filter for MBs using 8x8 transform · aebb16bf
      Yaowu Xu authored
      This commit added a set of loop filter functions for macroblocks
      using 8x8 transform. First we turned off the regular loop filtering
      on 4x4 block boundaries that do not exist in macroblocks using 8x8
      transform. Second, we change to use the same loop filter(mask and
      7 tap filter) that used for macroblock edge filtering.
      
      Change-Id: I3a00460b7674ced116917d86812ffc32578c1d3a
      aebb16bf
    • Yaowu Xu's avatar
      Added code to prevent I8X8_PRED mode for MBs using 8x8 transform · 5aab0c3f
      Yaowu Xu authored
      This fixed a conflict introduced by the change of adding 8x8 intra
      prediction modes. The 8x8 intra prediction mode code assumed the
      use of 4x4 transform, and causes encoder crashes when the codec is
      configured with --enable-t8x8.
      
      Change-Id: I00cc94df63e9725377ffba9eb51be6b77fe3fcf9
      5aab0c3f
    • Yaowu Xu's avatar
      reverted an accidental code deleting · be9af16e
      Yaowu Xu authored
      commit cf561bad accidentally deleted a line of code that sets the
      base_qindex for each frame, which leads to every frame is encoded
      at Q of 0.
      
      Change-Id: Ib5f8022e856bf3b3bd0d4147405e46241e3dcf2d
      be9af16e
  8. 18 Jan, 2012 3 commits
  9. 17 Jan, 2012 1 commit
    • Paul Wilkins's avatar
      Rate control on static scenes plus Y2dc delta Q fix. · cf561bad
      Paul Wilkins authored
      A problem can arise on static clips with force key frames where
      attempts to avoid popping lead to a progressive reduction in key
      frame Q that ultimately may lead to unexpected overspend against
      the  rate target.
      
      The changes in this patch help to insure that in such clips the
      quality of the key frames across the clip is more uniform (rather
      than starting bad and getting better - especially at low target rates).
      
      This patch also includes a fix that removes a delta on the Y2DC
      when the baseline q index < 4 as this is no longer needed.
      
      There is also a fix to try and prevent repeat single step Q adjustment in
      the recode loop leading to lots of recodes, especially where the use
      of forced skips as part of segmentation has made the impact of Q on
      the number of bits generated much smaller.
      
      Patch 2: Amend "last_boosted_qindex" calculation for arf overlay frames.
      
      Change-Id: Ia1feeb79ed8ed014e4239994fcf5e58e68fd9459
      cf561bad
  10. 11 Jan, 2012 1 commit
  11. 05 Jan, 2012 1 commit
    • Yaowu Xu's avatar
      Added an emms to prevent invalid stats output · a5ea6844
      Yaowu Xu authored
      In certain hardware configuration, where mmx code is enabled and
      other simd (sse2/sse3) disabled, lacking of this emms caused invalid
      internal stats outputs.
      
      Change-Id: I77c61cf6e0448d3f3b8c11781aa9e42f31d231c9
      a5ea6844
  12. 23 Dec, 2011 2 commits
  13. 21 Dec, 2011 2 commits
    • Christian Duvivier's avatar
      Fix a couple of warnings. · a7eb2176
      Christian Duvivier authored
      a7eb2176
    • Yaowu Xu's avatar
      changed mode_context update strategy · 4e9b4a15
      Yaowu Xu authored
      Previously, the mode context is always udpated based on stats of current
      frame, when there is no count, 50% is used for both left and right branch.
      However, it is observed that with such strategy, a small count or no count
      at all can skew the probability distribution significantly. This commmit
      changed the mode_context update strategy to prevent small counts from
      skewing the probability distributions.
      
      Tests on derf set showed a small gain:  .06% in psnr and .09% in ssim
      
      Change-Id: Ic812e64ae5f70251c170b0717f7b7fa587055488
      4e9b4a15
  14. 20 Dec, 2011 4 commits
  15. 19 Dec, 2011 4 commits
    • Paul Wilkins's avatar
      Extended Q: · 7187c462
      Paul Wilkins authored
      Cleanup and switch to Q extended at low end too.
      
      Change-Id: Ie22676bb9e961097d75dbd1d81745208b63e5f4b
      7187c462
    • Paul Wilkins's avatar
      Extend to 256 Q steps. · df4e79f7
      Paul Wilkins authored
      This commit extends the number of Q steps to 256 from 128.
      The q_trans[] array has been altered to distribute available Q index values
      (using the current 64 steps available as input parameters) evenly across the
      available range. This is coupled with the fact that each Q step where possible
      now equates to a fixed % change in the quantizer. This may want refinement
      later especially in terms of the granularity at the high quality end but is a
      reasonable starting point.
      
      Change-Id: I2aaa6874fa10ce05c958dd182947ce39f6f1eecb
      df4e79f7
    • Paul Wilkins's avatar
      QRange experiements. · ec670bc5
      Paul Wilkins authored
      High Q end extended a little.
      Some clean up.
      
      Slightly better on SSIM, Slightly worse on PSNR over derf set.
      
      Change-Id: I3dceea8a39e11c26e1a389a40e40b86efc76d28c
      ec670bc5
    • Paul Wilkins's avatar
      Further QIndex realted Fixes: · fb807776
      Paul Wilkins authored
      Added code to support 256 index steps instead of 128 but disabled for now.
      Replace hard wired table vp8cx_base_skip_false_prob[128]
      Observed Qindex problem with setting minimum loop filter value.
      (Experiment code using real Q in place but for now just returning 0. This has a big
      beneficial effect on some clips, particularly waterfall which shows 5% ssim gain)
      
      Change-Id: I2f7117de8adc1797164c106aa13effc900a1467e
      fb807776
  16. 16 Dec, 2011 1 commit
    • Adrian Grange's avatar
      Reset segment_id to 0 when segmentation is disabled · 0fafd054
      Adrian Grange authored
      Whilst the encoder explicitly set the segment_id to 0
      when segmentation is diabled, the decoder would allow
      the segment_id to persist from the previous frame.
      
      This fix attempts to make the decoder behave the same
      as the encoder by explicitly setting the segment_id to
      0 in this case.
      
      Change-Id: I65c3a05247550edb10706eb5d54d306dfb792309
      0fafd054
  17. 15 Dec, 2011 1 commit
    • Adrian Grange's avatar
      Fixed stride bug in segmentation code · b3ade15a
      Adrian Grange authored
      mode_info_context is padded with an additional column of data, so
      mode_info_stride should be used to move between rows rather than
      mb_cols.
      
      Change-Id: I598559a2cd9df1c486d64aaeccf76b76a7ecf21c
      b3ade15a