1. 30 Nov, 2012 1 commit
  2. 27 Nov, 2012 1 commit
    • John Koleszar's avatar
      Add vp9_ prefix to all vp9 files · fcccbcbb
      John Koleszar authored
      Support for gyp which doesn't support multiple objects in the same
      static library having the same basename.
      
      Change-Id: Ib947eefbaf68f8b177a796d23f875ccdfa6bc9dc
      fcccbcbb
  3. 16 Nov, 2012 1 commit
  4. 10 Nov, 2012 1 commit
  5. 08 Nov, 2012 1 commit
    • Ronald S. Bultje's avatar
      Implement tx_select for superblock encoding. · 1d4fbeb3
      Ronald S. Bultje authored
      Also split superblock handling code out of decode_macroblock() into
      a new function decode_superblock(), for easier readability.
      
      Derf +0.05%, HD +0.2%, STDHD +0.1%. We can likely get further gains
      by allowing to select mb_skip_coeff for a subset of the complete SB
      or something along those lines, because although this change allows
      coding smaller transforms for bigger predictors, it increases the
      overhead of coding EOBs to skip the parts where the residual is
      near-zero, and thus the overall gain is not as high as we'd expect.
      
      Change-Id: I552ce1286487267f504e3090b683e15515791efa
      1d4fbeb3
  6. 02 Nov, 2012 1 commit
    • Yunqing Wang's avatar
      Fix eobs data type · d41b0e64
      Yunqing Wang authored
      The block sizes for decoding tokens are up to 16x16, which means
      eobs is within [0, 256]. Using (signed) char is not enough. Changed
      eobs data type to unsigned short to fix the problem.
      
      Change-Id: I88a7d3098e1f1604c336d6adb88ffec971fb03a6
      d41b0e64
  7. 01 Nov, 2012 1 commit
  8. 31 Oct, 2012 1 commit
  9. 30 Oct, 2012 1 commit
  10. 22 Oct, 2012 1 commit
  11. 11 Oct, 2012 1 commit
  12. 30 Aug, 2012 1 commit
    • Jingning Han's avatar
      hybrid transform of 16x16 dimension · de6dfa6b
      Jingning Han authored
      Enable ADST/DCT of dimension 16x16 for I16X16 modes. This change provides
      benefits mostly for hd sequences.
      
      Set up the framework for selectable transform dimension.
      
      Also allowing quantization parameter threshold to control the use
      of hybrid transform (This is currently disabled by setting threshold
      always above the quantization parameter. Adaptive thresholding can
      be built upon this, which will further improve the coding performance.)
      
      The coding performance gains (with respect to the codec that has all
      other configuration settings turned on) are
      
      derf:   0.013
      yt:     0.086
      hd:     0.198
      std-hd: 0.501
      
      Change-Id: Ibb4263a61fc74e0b3c345f54d73e8c73552bf926
      de6dfa6b
  13. 21 Aug, 2012 1 commit
  14. 17 Aug, 2012 1 commit
  15. 03 Aug, 2012 1 commit
    • Daniel Kang's avatar
      16x16 DCT blocks. · fed8a183
      Daniel Kang authored
      Set on all 16x16 intra/inter modes
      
      Features:
      - Butterfly fDCT/iDCT
      - Loop filter does not filter internal edges with 16x16
      - Optimize coefficient function
      - Update coefficient probability function
      - RD
      - Entropy stats
      - 16x16 is a config option
      
      Have not tested with experiments.
      
      hd:     2.60%
      std-hd: 2.43%
      yt:     1.32%
      derf:   0.60%
      
      Change-Id: I96fb090517c30c5da84bad4fae602c3ec0c58b1c
      fed8a183
  16. 19 Jul, 2012 1 commit
    • Jingning Han's avatar
      Adds hybrid transform · 9824230f
      Jingning Han authored
      Adds ADST/DCT hybrid transform coding for Intra4x4 mode.
      The ADST is applied to directions in which the boundary
      pixels are used for prediction, while DCT applied to
      directions without corresponding boundary prediction.
      
      Adds enum TX_TYPE in b_mode_infor to indicate the transform
      type used.
      
      Make coding style consistent with google style.
      Fixed the commented issues.
      
      Experimental results in terms of bit-rate reduction:
      derf:   0.731%
      yt:     0.982%
      std-hd: 0.459%
      hd:     0.725%
      
      Will be looking at 8x8 transforms next.
      
      Change-Id: I46dbd7b80dbb3e8856e9c34fbc58cb3764a12fcf
      9824230f
  17. 17 Jul, 2012 1 commit
  18. 29 Jun, 2012 1 commit
    • Hui Su's avatar
      Add lossless compression mode. · e44ee38a
      Hui Su authored
      This commit adds lossless compression capability to the experimental
      branch. The lossless experiment can be enabled using --enable-lossless
      in configure. When the experiment is enabled, the encoder will use
      lossless compression mode by command line option --lossless, and the
      decoder automatically recognizes a losslessly encoded clip and decodes
      accordingly.
      
      To achieve the lossless coding, this commit has changed the following:
          1. To encode at lossless mode, encoder forces the use of unit
      quantizer, i.e, Q 0, where effective quantization is 1. Encoder also
      disables the usage of 8x8 transform and allows only 4x4 transform;
          2. At Q 0, the first order 4x4  DCT/IDCT have been switched over
      to a pair of forward and inverse Walsh-Hadamard Transform
      (http://goo.gl/EIsfy),  with proper scaling applied to match the range
      of the original 4x4 DCT/IDCT pair;
          3. At Q 0, the second order remains to use the previous
      walsh-hadamard transform pair. However, to maintain the reversibility
      in second order transform at Q 0, scaling down is applied to first
      order DC coefficients prior to forward transform, and scaling up is
      applied to the second order output prior to quantization. Symmetric
      upscaling and downscaling are added around inverse second order
      transform;
          4. At lossless mode, encoder also disables a number of minor
      features to ensure no loss is introduced, these features includes:
              a. Trellis quantization optimization
              b. Loop filtering
              c. Aggressive zero-binning, rounding and zero-bin boosting
              d. Mode based zero-bin boosting
      
      Lossless coding test was performed on all clips within the derf set,
      to verify that the commit has achieved lossless compression for all
      clips. The average compression ratio is around 2.57 to 1.
      (http://goo.gl/dEShs)
      
      Change-Id: Ia3aba7dd09df40dd590f93b9aba134defbc64e34
      e44ee38a
  19. 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
  20. 01 Mar, 2012 1 commit
  21. 15 Dec, 2011 1 commit
    • Scott LaVarnway's avatar
      Moved dequant idct into common · a53d5a4c
      Scott LaVarnway authored
      These functions are now used by the encoder.
      This is WIP with the goal of creating a common idct/add for
      the encoder and decoder.  A boost of 1.8% was seen for
      the HD rt test clip used.
      
      [Tero] Added needed changes to ARM side.
      
      Change-Id: Ibbb8000be09034203d7adffc457d3c3f8b06a5bf
      a53d5a4c
  22. 25 Nov, 2011 1 commit
    • Scott LaVarnway's avatar
      Modified the inverse walsh to output directly · 4a91541c
      Scott LaVarnway authored
      to the dqcoeff or qcoeff buffer.  The encoder would
      populate the dc coeffs of the y blocks as a separate
      stage (recon_dcblock) and the decoder would use a special
      version of the idct.  This change eliminates the extra copy
      and reduces the code footprint.
      
      [Tero] Added needed changes to armv6 and NEON assembly.
      
      Change-Id: I83202ffdbaf83f6e5dd69f4ba2519fcf0b13b3ba
      4a91541c
  23. 11 Nov, 2011 1 commit
    • Yaowu Xu's avatar
      changed function name for clarity · e01b3925
      Yaowu Xu authored
      The dequantizer functions for 2nd order haar block had confusing 8x8
      in their names. this commit fixed their name to avoid confusion.
      
      Change-Id: I6ae4e7888330865f831436313637d4395b1fc273
      e01b3925
  24. 18 Oct, 2011 1 commit
    • Scott LaVarnway's avatar
      Remove usage of predict buffer for decode · ed9c66f5
      Scott LaVarnway authored
      Instead of using the predict buffer, the decoder now writes
      the predictor into the recon buffer.  For blocks with eob=0,
      unnecessary idcts can be eliminated.  This gave a performance
      boost of ~1.8% for the HD clips used.
      
      Tero: Added needed changes to ARM side and scheduled some
            assembly code to prevent interlocks.
      
      Patch Set 6:  Merged (I1bcdca7a95aacc3a181b9faa6b10e3a71ee24df3)
      into this commit because of similarities in the idct
      functions.
      Patch Set 7: EC bug fix.
      
      Change-Id: Ie31d90b5d3522e1108163f2ac491e455e3f955e6
      ed9c66f5
  25. 21 Jul, 2011 1 commit
    • Yaowu Xu's avatar
      fix more merge issues · 8c31484e
      Yaowu Xu authored
      With this fix, the experimental branch now builds and encodes correctly
      with the following two configure options respectively:
      --enable-experimental --enable-t8x8
      --enable-experimental
      
      Change-Id: I3147c33c503fe713a85fd371e4f1a974805778bf
      8c31484e
  26. 20 Jul, 2011 1 commit
  27. 10 Feb, 2011 1 commit
    • John Koleszar's avatar
      Fix relative include paths · 02321de0
      John Koleszar authored
      Allow compiling without adding vp8/{common,encoder,decoder} to the
      include paths.
      
      Change-Id: Ifeb5dac351cdfadcd659736f5158b315a0030b6c
      02321de0
  28. 09 Sep, 2010 1 commit
  29. 23 Aug, 2010 1 commit
    • Fritz Koenig's avatar
      Rework idct calling structure. · 93c32a55
      Fritz Koenig authored
      Moving the eob structure allows for a non-struct based
      function to handle decoding an entire mb of
      idct/dequant/recon data.  This allows for SIMD functions
      to idct/dequant/recon multiple blocks at once.
      
      SSE2 implementation gives 3% gain on Atom.
      
      Change-Id: I8a8f3efd546ea4e0535f517d94f347cfb737c9c2
      93c32a55
  30. 26 Jul, 2010 1 commit
    • Johann's avatar
      update arm idct functions · 56f5a9a0
      Johann authored
      Jeff Muizelaar posted some changes to the idct/reconstruction c code.
      This is the equivalent update for the arm assembly.
      
      This shows a good boost on v6, and a minor boost on neon.
      Here are some numbers for highway in qcif, 2641 frames:
      HEAD neon: ~161 fps
      new neon:  ~162 fps
      HEAD v6:   ~102 fps
      new v6:    ~106 fps
      
      The following functions have been updated for armv6 and neon:
      vp8_dc_only_idct_add
      vp8_dequant_idct_add
      vp8_dequant_dc_idct_add
      
      Conflicts:
      
      	vp8/decoder/arm/armv6/dequantdcidct_v6.asm
      	vp8/decoder/arm/armv6/dequantidct_v6.asm
      
      Resolved by removing these files. When I rewrote the functions, I also
      moved the files to dequant_dc_idct_v6.asm/dequant_idct_v6.asm
      
      Change-Id: Ie3300df824d52474eca1a5134cf22d8b7809a5d4
      56f5a9a0
  31. 23 Jul, 2010 1 commit
    • Jeff Muizelaar's avatar
      Combine idct and reconstruction steps · b2fa74ac
      Jeff Muizelaar authored
      This moves the prediction step before the idct and combines the idct and
      reconstruction steps into a single step. Combining them seems to give an
      overall decoder performance improvement of about 1%.
      
      Change-Id: I90d8b167ec70d79c7ba2ee484106a78b3d16e318
      b2fa74ac
  32. 18 Jun, 2010 1 commit
    • John Koleszar's avatar
      cosmetics: trim trailing whitespace · 94c52e4d
      John Koleszar authored
      When the license headers were updated, they accidentally contained
      trailing whitespace, so unfortunately we have to touch all the files
      again.
      
      Change-Id: I236c05fade06589e417179c0444cb39b09e4200d
      94c52e4d
  33. 04 Jun, 2010 1 commit
  34. 18 May, 2010 1 commit