1. 10 Jan, 2013 1 commit
  2. 09 Jan, 2013 1 commit
    • Adrian Grange's avatar
      New prediction filter · 7d6b5425
      Adrian Grange authored
      This patch removes the old pred-filter experiment and replaces it
      with one that is implemented using the switchable filter framework.
      
      If the pred-filter experiment is enabled, three interopolation
      filters are tested during mode selection; the standard 8-tap
      interpolation filter, a sharp 8-tap filter and a (new) 8-tap
      smoothing filter.
      
      The 6-tap filter code has been preserved for now and if the
      enable-6tap experiment is enabled (in addition to the pred-filter
      experiment) the original 6-tap filter replaces the new 8-tap smooth
      filter in the switchable mode.
      
      The new experiment applies the prediction filter in cases of a
      fractional-pel motion vector. Future patches will apply the filter
      where the mv is pel-aligned and also to intra predicted blocks.
      
      Change-Id: I08e8cba978f2bbf3019f8413f376b8e2cd85eba4
      7d6b5425
  3. 08 Jan, 2013 4 commits
    • Deb Mukherjee's avatar
      Adds 64x64 hybrid dct/dwt transform · 4b7304ee
      Deb Mukherjee authored
      This is to add to the 64x64 transform experiment as an alternative to
      a 64x64 DCT.
      Two levels of wavelet decomposition is used on a 64x64 block, followed
      by 16x16 DCT on the four lowest subbands. The highest three subbands
      are left untransformed after the first level DWT.
      
      Change-Id: I3d48d5800468d655191933894df6b46e15adca56
      4b7304ee
    • Ronald S. Bultje's avatar
      Merge superblocks (32x32) experiment. · 4455036c
      Ronald S. Bultje authored
      Change-Id: I0df99742029834a85c4933652b0587cf5b6b2587
      4455036c
    • Yaowu Xu's avatar
      reset segement map on key frame · c14439c3
      Yaowu Xu authored
      This is to fix a decoder crash when decoder skips a number of frame to
      continue decoding from a later key frame.
      
      Change-Id: I3ba116eba6c3440e0528a21f53745f694302e4ad
      c14439c3
    • Yaowu Xu's avatar
      minor loop filter refactoring and cleanup · d278d018
      Yaowu Xu authored
      This commit did a couple of minor cleanup/refactoring to prepare for
      futher loop filter experiments. It merged y_only version of loop filter
      function into the regular one, which makes sure that same logic is used
      for functions for picking level and for actual loop filtering.
      
      Change-Id: Id10c94dccd45f58e5310bacfdf6ee63cbb60b86f
      d278d018
  4. 07 Jan, 2013 3 commits
  5. 06 Jan, 2013 1 commit
  6. 04 Jan, 2013 1 commit
    • Adrian Grange's avatar
      Fix mode selection infinite loop bug · 81d1171f
      Adrian Grange authored
      Mode selection for SBs could enter an infinite loop because
      the interpolation filter mode index was not being reset
      correctly.
      
      Change-Id: I4bbe726f29ef5b6836e94884067c46084713cc11
      81d1171f
  7. 03 Jan, 2013 3 commits
    • Yaowu Xu's avatar
      make cost_coeffs() and tokenize_b() consistent · 83664f45
      Yaowu Xu authored
      Change-Id: I7cdb5c32a1400f88ec36d08ea982e38b77731602
      83664f45
    • Adrian Grange's avatar
      New interpolation filter selection algorithm · 259b8008
      Adrian Grange authored
      Old Scheme:
      When SWITCHABLE filter selection is enabled the encoder
      evaluates the use of each interpolation filter type and
      selects the best one to use at the MB level. A frame-
      level flag can be set to force the use of a particular
      filter type for all MBs in a frame if it is more efficient
      to encode that way. The logic here involved a Q dependent
      threshold that assumed that the second 8-tap filter was
      a high-pass filter. However, this requires a trip around
      the recode loop. If the frame-level flag indicates use
      of a particular filter, the other filters are not
      evaluated in the pick_mode loop.
      
      New Scheme:
      Each filter type is evaluated at the MB level and a record
      of the best filter is kept, irrespective of what filter
      is signaled at the frame-level. Once all MBs have been
      encoded, a decision is made as to what frame-level mode
      to set for the *next* frame. If one filter is used by 80%
      or more of the MBs, then this filter is forced since it
      is assumed that this will be more efficient if the
      next frame has similar characteristics. i.e. there is a
      one-frame lag between measuring the filter selection and
      setting the frame-level mode to use.
      
      Change-Id: I6a7e7ced8f27e120fafb99db2dc9c6293f8d20f7
      259b8008
    • Yaowu Xu's avatar
      Merge cost_coeffs_2x2() into cost_coeffs() · bd28510e
      Yaowu Xu authored
      Remove special case function cost_coeffs_2x2() and change function
      cost_coeffs() to handle 2nd order haar block as it is handle all
      other block types already.
      
      Change-Id: I2aac6f81ee0ae9e03d6a8da4f8681d69b79ce41f
      bd28510e
  8. 02 Jan, 2013 2 commits
  9. 26 Dec, 2012 1 commit
  10. 20 Dec, 2012 2 commits
    • Jim Bankoski's avatar
      add private to assembly files to insure proper chromebuild · 1dffce7f
      Jim Bankoski authored
      Change-Id: I6e43ca73f35401a974ed8ee27738d4318f09fd37
      1dffce7f
    • Deb Mukherjee's avatar
      New previous coef context experiment · 08f0c7cc
      Deb Mukherjee authored
      Adds an experiment to derive the previous context of a coefficient
      not just from the previous coefficient in the scan order but from a
      combination of several neighboring coefficients previously encountered
      in scan order.  A precomputed table of neighbors for each location
      for each scan type and block size is used. Currently 5 neighbors are
      used.
      
      Results are about 0.2% positive using a strategy where the max coef
      magnitude from the 5 neigbors is used to derive the context.
      
      Change-Id: Ie708b54d8e1898af742846ce2d1e2b0d89fd4ad5
      08f0c7cc
  11. 19 Dec, 2012 1 commit
    • John Koleszar's avatar
      Use boolcoder API instead of inlining · 05ec800e
      John Koleszar authored
      This patch changes the token packing to call the bool encoder API rather
      than inlining it into the token packing function, and similarly removes
      a special get_signed case from the detokenizer. This allows easier
      experimentation with changing the bool coder as a whole.
      
      Change-Id: I52c3625bbe4960b68cfb873b0e39ade0c82f9e91
      05ec800e
  12. 18 Dec, 2012 4 commits
  13. 17 Dec, 2012 2 commits
    • John Koleszar's avatar
      Remove vp9_type_aliases.h · 1306ba76
      John Koleszar authored
      Prefer the standard fixed-size integer typedefs.
      
      Change-Id: Iad75582350669e49a8da3b7facb9c259e9514a5b
      1306ba76
    • Paul Wilkins's avatar
      Problem of over smoothing with intra modes. · d8f5d1b2
      Paul Wilkins authored
      In some cases intra modes in inter frames give
      an over smoothed appearance. Especially with
      noisy but flat content.
      
      Also in some cases there were problems with key
      frame sizing again with very flat but noisy content.
      
      These are temporary changes to help alleviate the
      visual problems but will almost certainly hurt metric
      results especially at the very low data rate end.
      
      Change-Id: I11549179a19277ffc283d9788bc70168f2a8bdc9
      d8f5d1b2
  14. 14 Dec, 2012 1 commit
    • Yaowu Xu's avatar
      reset segement map on key frame · 6247b239
      Yaowu Xu authored
      This is to fix a decoder crash when decoder skips a number of frame to
      continue decoding from a later key frame.
      
      Change-Id: I3ba116eba6c3440e0528a21f53745f694302e4ad
      6247b239
  15. 13 Dec, 2012 4 commits
    • Yaowu Xu's avatar
      fixed an encoder/decoder mismatch · 2b9ec585
      Yaowu Xu authored
      The mismatch was caused by an improper merge of cleanup code around
      tokenize_b() and stuff_b() with TX32X32 experiment.
      
      Change-Id: I225ae62f015983751f017386548d9c988c30664c
      2b9ec585
    • Deb Mukherjee's avatar
      Build fixes with teh super blcoks and 32x32 expts · 7fa3deb1
      Deb Mukherjee authored
      Change-Id: I3c751f8d57ac7d3b754476dc6ce144d162534e6d
      7fa3deb1
    • Deb Mukherjee's avatar
      Further improvements on the hybrid dwt/dct expt · 210dc5b2
      Deb Mukherjee authored
      Modifies the scanning pattern and uses a floating point 16x16
      dct implementation for now to handle scaling better.
      Also experiments are in progress with 2/6 and 9/7 wavelets.
      
      Results have improved to within ~0.25% of 32x32 dct for std-hd
      and about 0.03% for derf. This difference can probably be bridged by
      re-optimizing the entropy stats for these transforms. Currently
      the stats used are common between 32x32 dct and dwt/dct.
      
      Experiments are in progress with various scan pattern - wavelet
      combinations.
      
      Ideally the subbands should be tokenized separately, and an
      experiment will be condcuted next on that.
      
      Change-Id: Ia9cbfc2d63cb7a47e562b2cd9341caf962bcc110
      210dc5b2
    • Ronald S. Bultje's avatar
      New default coefficient/band probabilities. · 5a5df19d
      Ronald S. Bultje authored
      Gives 0.5-0.6% improvement on derf and stdhd, and 1.1% on hd. The
      old tables basically derive from times that we had only 4x4 or
      only 4x4 and 8x8 DCTs.
      
      Note that some values are filled with 128, because e.g. ADST ever
      only occurs as Y-with-DC, as does 32x32; 16x16 ever only occurs
      as Y-with-DC or as UV (as complement of 32x32 Y); and 8x8 Y2 ever
      only has 4 coefficients max. If preferred, I can add values of
      other tables in their place (e.g. use 4x4 2nd order high-frequency
      probabilities for 8x8 2nd order), so that they make at least some
      sense if we ever implement a larger 2nd order transform for the
      8x8 DCT (etc.), please let me know
      
      Change-Id: I917db356f2aff8865f528eb873c56ef43aa5ce22
      5a5df19d
  16. 12 Dec, 2012 2 commits
    • Scott LaVarnway's avatar
      Improved vp9_ihtllm_c · b575394e
      Scott LaVarnway authored
      As suggested by Yaowu, we can use eob to reduce the complexity
      of the vp9_ihtllm_c function.  For the 1080p test clip used, the decoder
      performance improved by 17%.
      
      Change-Id: I32486f2f06f9b8f60467d2a574209aa3a3daa435
      b575394e
    • Ronald S. Bultje's avatar
      Consistently use get_prob(), clip_prob() and newly added clip_pixel(). · 4d0ec7aa
      Ronald S. Bultje authored
      Add a function clip_pixel() to clip a pixel value to the [0,255] range
      of allowed values, and use this where-ever appropriate (e.g. prediction,
      reconstruction). Likewise, consistently use the recently added function
      clip_prob(), which calculates a binary probability in the [1,255] range.
      If possible, try to use get_prob() or its sister get_binary_prob() to
      calculate binary probabilities, for consistency.
      
      Since in some places, this means that binary probability calculations
      are changed (we use {255,256}*count0/(total) in a range of places,
      and all of these are now changed to use 256*count0+(total>>1)/total),
      this changes the encoding result, so this patch warrants some extensive
      testing.
      
      Change-Id: Ibeeff8d886496839b8e0c0ace9ccc552351f7628
      4d0ec7aa
  17. 11 Dec, 2012 1 commit
  18. 10 Dec, 2012 2 commits
    • Deb Mukherjee's avatar
      A bug fix related to switchable filters · 14a38a87
      Deb Mukherjee authored
      The switchable count update was mistakenly inside a macro.
      
      Change-Id: Iec04c52ad57034b88312dbaf05eee1f47ce265b3
      14a38a87
    • Paul Wilkins's avatar
      Further changes to mv reference code. · d1244659
      Paul Wilkins authored
      Some further changes and refactoring of mv
      reference code and selection of center point for
      searches. Mainly relates to not passing so many
      different local copies of things around.
      
      Some place holder comments.
      
      Change-Id: I309f10ffe9a9cde7663e7eae19eb594371c8d055
      d1244659
  19. 08 Dec, 2012 2 commits
    • Yaowu Xu's avatar
      experiment with CONTEXT conversion · ab480ced
      Yaowu Xu authored
      This commit changed the ENTROPY_CONTEXT conversion between MBs that
      have different transform sizes.
      
      In additioin, this commit also did a number of cleanup/bug fix:
      1. removed duplicate function vp9_fix_contexts() and changed to use
      vp8_reset_mb_token_contexts() for both encoder and decoder
      2. fixed a bug in stuff_mb_16x16 where wrong context was used for
      the UV.
      3. changed reset all context to 0 if a MB is skipped to simplify the
      logic.
      
      Change-Id: I7bc57a5fb6dbf1f85eac1543daaeb3a61633275c
      ab480ced
    • Ronald S. Bultje's avatar
      Introduce vp9_coeff_probs/counts/stats/accum types. · 885cf816
      Ronald S. Bultje authored
      Use these, instead of the 4/5-dimensional arrays, to hold statistics,
      counts, accumulations and probabilities for coefficient tokens. This
      commit also re-allows ENTROPY_STATS to compile.
      
      Change-Id: If441ffac936f52a3af91d8f2922ea8a0ceabdaa5
      885cf816
  20. 07 Dec, 2012 2 commits