1. 06 Jan, 2013 1 commit
  2. 04 Jan, 2013 2 commits
    • 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
    • Paul Wilkins's avatar
      Further change to mv reference search. · c6ba3a3d
      Paul Wilkins authored
      This experimental change reorders the search so
      that all possible references that match the target
      reference frame are tested first and these in order
      of distance from the current block. These will usually
      be the highest scoring candidates.
      
      If we do not find enough good candidates this way
      we try non matching cases. These will usually be lower
      scoring candidates.
      
      The change in order together with breakouts when
      we have found enough candidates should reduce
      the computational cost and especially reduce the number
      of sort operations.
      
      Quality Results:
      Std Hd +0.228%, Hd +0.074%, YT +0.046%, derf +0.137%
      
      This effect is probably due to the fact that more distant
      weak candidates are now less likely to get "promoted" over
      near candidates even if they are repeated.
      
      Change-Id: Iec37e77d88a48ad0ee1f315b14327a95d63f81f6
      c6ba3a3d
  3. 03 Jan, 2013 5 commits
    • Yaowu Xu's avatar
    • Yaowu Xu's avatar
    • 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
  4. 02 Jan, 2013 4 commits
  5. 28 Dec, 2012 1 commit
    • Yunqing Wang's avatar
      Skip finding best ref_mvs when the mode is ZEROMV · 0f4de157
      Yunqing Wang authored
      Read mode before calling vp9_find_best_ref_mvs(). If the mode is
      ZEROMV, the best ref_mvs are not needed. Then, we can skip calling
      vp9_find_best_ref_mvs().
      
      Change-Id: I5baa3658dd3f1c7107211cbbbcf919b4584be2e2
      0f4de157
  6. 27 Dec, 2012 1 commit
    • Yunqing Wang's avatar
      Switch the order of calculating 2-D inverse transform · cc80247f
      Yunqing Wang authored
      The 2-D inverse transform X = M1*Z*Transposed_M2 was calculated
      in 2 steps from left to right:
      1. Vertical transform: Y = M1*Z
      2. Horizontal transform: X= Y*Transposed_M2
      In SIMD, a transpose is needed in vertical transform.
      
      Here, switched the calculation order to do it from right to left.
      In this way, we could eliminate that transpose by writing the
      intermediate results out to their transposed positions.
      
      Change-Id: I34dfe5eb01292f6e363712420d99475e2e81e12c
      cc80247f
  7. 21 Dec, 2012 2 commits
  8. 20 Dec, 2012 1 commit
    • 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
  9. 19 Dec, 2012 2 commits
    • John Koleszar's avatar
      make: fix dependency generation · de529486
      John Koleszar authored
      Remove an extra level of escaping around the $@ variable to get valid output.
      Prior to this change, modifying header files did not trigger a rebuild of
      sources dependent on them.
      
      Change-Id: I93ecc60371b705b64dc8a2583a5d31126fe3f851
      de529486
    • 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
  10. 18 Dec, 2012 11 commits
  11. 17 Dec, 2012 1 commit
  12. 13 Dec, 2012 7 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
    • Yaowu Xu's avatar
      fixed build issue with round() · c6818876
      Yaowu Xu authored
      not defined in msvc
      
      Change-Id: I8fe8462a0c2f636d8b43c0243832ca67578f3665
      c6818876
    • 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
    • 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
    • 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
  13. 12 Dec, 2012 2 commits
    • Ronald S. Bultje's avatar
    • 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