1. 04 Nov, 2011 2 commits
    • Paul Wilkins's avatar
      Segment Feature Data Access · a258bba1
      Paul Wilkins authored
      No change to functionality or output.
      
      Updates to the segment feature data structure now all done
      through functions such as set_segdata() and get_segdata()
      in seg_common.c.
      
      The reason for this is to make changing the structures (if needed)
      and debug easier.
      
      In addition it provides a single location for subsequent addition
      of range and validity checks. For  example valid combination of
      mode and reference frame.
      
      Change-Id: I2e866505562db4e4cb6f17a472b25b4465f01add
      a258bba1
    • Yaowu Xu's avatar
      make uv intra mode coding adaptive to Y mode · 2bbde250
      Yaowu Xu authored
      This commit tries to do UV intra mode coding adaptive to Y intra mode.
      Entropy context is defined as conditional PDF of uv intra mode given
      the Y mode. All constants are normalized with 256 to be fit in 8 bits.
      
      This provides further coding efficiency beyond the quantizer adaptive
      y intra mode coding. Consistent gains were observed on all clips and
      all bit rates for HD all key encoding tests.
      
      To test, configure with
      --enable-experimental --enable-uvintra
      
      Change-Id: I2d78d73f143127f063e19bd0bac3b68c418d756a
      2bbde250
  2. 03 Nov, 2011 2 commits
  3. 02 Nov, 2011 2 commits
    • Paul Wilkins's avatar
    • Paul Wilkins's avatar
      Segmentation: Reference frames · 87ff8620
      Paul Wilkins authored
      Modify reference frame segmentation so that ONE or MORE
      reference frames may be marked as a available for a given
      segment.
      
      Fixed bugs relating to segment coding of INTRA and some
      INTER modes at the segment level.
      
      Modified Q boost for static areas based on ambient average Q.
      
      Strong results now on clips with significant static areas.
      (some data points in derf set as high as 9% and some static &
      slide show type content in YT set > 20%)
      
      Change-Id: Ia79f912efa84b977f35a23683ae3643251e24f0c
      87ff8620
  4. 01 Nov, 2011 1 commit
    • Adrian Grange's avatar
      Deleted repeated code block · 2b450a46
      Adrian Grange authored
      The block of code skipped testing the current mode if the
      reference frame is AltRef, the mv is not (0,0) and
      ARNR filtering is disabled.
      
      This block of code has already been tested above if the
      macro CONFIG_SEGFEATURES is set to 0.
      
      Change-Id: I3f5710bb8270caad06c9a0eee59fa0daf1f70776
      2b450a46
  5. 31 Oct, 2011 2 commits
    • Adrian Grange's avatar
      Fixed this_mode used before set in vp8_pick_inter_mode · 71fb1f8e
      Adrian Grange authored
      The variable this_mode was being used before it had been
      initialized.
      
      Moved the line that sets-up this_mode toward the top of the
      enclosing loop, prior to its first use. The bug would result in
      tests in the loop lagging the mode that was expected to be
      tested.
      
      Change-Id: If4e51600449ce6b4285f112da17a44c24b4a19fb
      71fb1f8e
    • Paul Wilkins's avatar
      Segmentation Entropy and tweaks. · 795c6dd2
      Paul Wilkins authored
      Some correction for entropy impact of segment signaled (EOB and ref frame)
      
      Other slight tweaks.
      
      Derf VBR average gain now over 1% (best over 7%)
      One YT test clip has gains of circa 30% (VBR)
      
      There is still an issue with noisy clips where making the background static
      and coded with 0,0 can have a negative effect, especially at low Q.
      This is probably because of the loss of smoothing by fractional pixel filters.
      
      Change-Id: I7a225613c98067b96f8fc7a7e36f95d465b2b834
      795c6dd2
  6. 27 Oct, 2011 1 commit
    • Paul Wilkins's avatar
      Resolve build problem · afb52f65
      Paul Wilkins authored
      Resolved experimental branch build problem when seg_features not configured.
      
      Change-Id: Ia0f9b460a26dc3eac9844ee595a7b196e9faf6a5
      afb52f65
  7. 25 Oct, 2011 2 commits
  8. 24 Oct, 2011 3 commits
    • Yaowu Xu's avatar
      added a last stage rounding for 8x8 inverse dct · a66c945c
      Yaowu Xu authored
      Prior to the added rounding, tests on randomly generated data showed
      that forward-inverse transform round trip errors are about 3.02/block
      for input range [-10,10] and 2.68/block for input range [-256, 255].
      The added rounding reduced the errors to 0.031/block for input range
      [-10,10] and 0.037/block for input range [-256, 255].
      
      Maximum round trip error on for any pixel position is 1.
      
      The average errors are calculated based on 100,000 blocks of randomly
      with the specified ranges.
      
      Paul mentioned in discussion that the change was not clear on why we
      need change the rounding, so Patch 2 intends to make the rationale
      obvious in code, it merged the two separate shifts into one, and the
      two separate rounding factors into one. Patch 1 and 2 have same
      numerical test results.
      
      Change-Id: Ic5e2f5463de17253084d8b2398c4a210194b20de
      a66c945c
    • Paul Wilkins's avatar
      Segmentation Features; · 23701f4f
      Paul Wilkins authored
      Only encode sign bit for feature data that can have a sign.
      
      Tweaks to the test segmentation rules so that it now actually gives
      a net benefit on the derf set of about 0.4% though much higher
      on some clips at the low end.
      
      Change-Id: I8e61f1aebf41c9037db7e67e2f8975aa18a0c986
      23701f4f
    • 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
  9. 14 Oct, 2011 1 commit
    • Yaowu Xu's avatar
      fixed the wrong rounding in inverse haar transform · 152ce6b2
      Yaowu Xu authored
      Given the current forward haar transform:
       f0 = I0 + I1 + I2 + I3
       f1 = I0 + I1 - I2 - I3
       f2 = I0 - I1 + I2 - I3
       f3 = I0 - I1 - I2 + I3
      the output of the inverse haar prior rounding:
       i0 = f0 + f1 + f2 + f3 = I0 * 4;
       i1 = f0 + f1 - f2 - f3 = I1 * 4;
       i2 = f0 - f1 + f2 - f3 = I2 * 4;
       i3 = f0 - f1 - f2 + f3 = I3 * 4;
      As all the numbers are 4 multiples, simply >>2 always produces prefect
      results in term of forward-inverse transform round trip error.
      
      Change-Id: Id6658b00ea819ee61cfeef8c5985d4cd3e77f44e
      152ce6b2
  10. 08 Oct, 2011 1 commit
    • Yaowu Xu's avatar
      fixed a decoder bug · 3ca84969
      Yaowu Xu authored
      When 8x8 transform is enabled, the decoder does an extra reconstruct
      on MBs that are coded using 8x8. This commit fixed the logic around
      the decoding of mb encoded with 8x8 transform.
      
      Change-Id: I6926557c9ef00eecb375f62946f7e140c660bf6f
      3ca84969
  11. 30 Sep, 2011 2 commits
    • Paul Wilkins's avatar
      Segment coding of mode and reference frame. · 156b221a
      Paul Wilkins authored
      Proof of concept test code that encodes mode and reference
      frame data at the segment level.
      
      Decode-able bit stream but some issues not yet resolved.
      As it this helps a little on a couple of clips but hurts on most as
      the basis for segmentation is unsound.
      
      To build and test, configure with
      --enable-experimental --enable-segfeatures
      
      Change-Id: I22a60774f69273523fb152db8c31f4b10b07c7f4
      156b221a
    • Paul Wilkins's avatar
      Experimental: segfeature added. · 45e49e6e
      Paul Wilkins authored
      New setting added to configure script
      45e49e6e
  12. 22 Sep, 2011 1 commit
  13. 21 Sep, 2011 3 commits
  14. 20 Sep, 2011 10 commits
  15. 19 Sep, 2011 3 commits
    • Stefan Holmer's avatar
      Fix necessary for input partitions iface to match the RTP profile · e529a825
      Stefan Holmer authored
      These changes fixes a glitch between the RTP profile and the input
      partitions interface. Since there's no way for the user to know the
      actual number of partitions, the decoder have to read the
      multi_token_paritition bits also when input partitions mode is
      enabled.
      
      Included are also a couple of fixes for issues with independent
      partitions and uninitialized memory reads.
      
      Change-Id: I6f93b15287d291169ed681898ed3fbcc5dc81837
      e529a825
    • Tero Rintaluoma's avatar
      Updated ARMv6 forward transforms to match C · 4c3ad66b
      Tero Rintaluoma authored
      - Updated walsh transform to match C
        (based on Change Id24f3392)
      - Changed fast_fdct4x4 and 8x4 to short_fdct4x4 and 8x4
        correspondingly
      
      Change-Id: I704e862f40e315b0a79997633c7bd9c347166a8e
      4c3ad66b
    • Tero Rintaluoma's avatar
      NEON walsh transform updated to match C · 2a4b2a00
      Tero Rintaluoma authored
      Modified original patch If2f07220885c4c3a0cae0dace34ea0e36124f001
      according to comments. Scheduled code a little bit to prevent some
      interlocks.
      
      Change-Id: I338f02b881098782f82af63d97f042b85e63e902
      2a4b2a00
  16. 18 Sep, 2011 1 commit
  17. 17 Sep, 2011 3 commits