1. 31 Oct, 2011 1 commit
    • 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
  2. 24 Oct, 2011 2 commits
    • 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
  3. 30 Sep, 2011 1 commit
    • 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
  4. 16 Sep, 2011 3 commits
    • Yaowu Xu's avatar
      enable selecting&transmitting to for intra mode entropy · 1d44e7ce
      Yaowu Xu authored
      This commit added a 3 bit index to the bitstream, the index is used to
      look into the intra mode coding entropy context table. The commit uses
      the mode stats to calculate the cost of transmitting modes using 8
      possible entropy distributions, and selects the distribution that
      provides the lowest cost to do the actual mode coding.
      
      Initial test show this provides additional .2%~.3% gain over quantizer
      adaptive intra mode coding. So the adaptive intra mode coding provides
      a total of .5%(psnr) to .6% gain(ssim) combined for all-key-encoding
      
      To build and test, configure with
      --enable-experimental --enable-qimode
      
      Change-Id: I7c41cd8bfb352bc1fe7c5da1848a58faea5ed74a
      1d44e7ce
    • Yaowu Xu's avatar
      add quantizer adaptive intra mb mode encoding · aac2c126
      Yaowu Xu authored
      make intra mode coding entropy distribution adaptive to baseQindex, an
      encoding test on hd clips with all key frame shows universal gain on
      all clips in both .2%(psnr) and (ssim).3%.
      
      To build and test, configure with
      --enable-experimental --enable-qimode
      
      Change-Id: Iaa69241b984d4fdd8baa6d77ee78c0140f5ac00a
      aac2c126
    • Yaowu Xu's avatar
      add 8x8 intra prediction modes · ca6b85aa
      Yaowu Xu authored
      Patch 1 to Patch 3 is an initial implementation of 8x8 intra prediction
      modes, here are with the following assumptions:
      a. 8x8 has 4 prediction modes DC, H, V and TM
      b. UV 4x4 block use the same mode as corresponding 8x8 area
      c. i8x8 modes are enabled for key frame only for now
      Patch 4:
      d. removed debug code from previous patches
      Patch 5:
      e. added stats code to collect entropy stats and further cleaned up
      Patch 6:
      f. changed mode stats code to collect finer stats of modes
      Patch 7:
      g. normalized i8x8 modes distribution to total at 256 (8bits).
      Patch 8:
      h. fixed a bug in decoder and removed debug printf output.
      Patch 9:
      i. more cleanups to address paul's comment
      Patch 10:
      j. messy rebase/merges to bring the commit up to date.
      
      Tests on HD clips encoded with all key frame showing consistent gain
      on all clips and all metrics:~0.5%(psnr) and 0.6%(ssim):
      http://www.corp.google.com/~yaowu/no_crawl/i8x8hd_allkey_fixedq.html
      
      To build and test, configure with:
      --enable-experimental --enable-i8x8
      
      Change-Id: I9813fe07ae48cab5fdb5d904bca022514ad01e7f
      ca6b85aa
  5. 15 Sep, 2011 1 commit
    • Paul Wilkins's avatar
      Segment Feature Signaling · ceb51742
      Paul Wilkins authored
      Plumbing for tuning new segment features on and off.
      
      Change-Id: If86cd6f103296b73030e8af7cf85c5b9bbffdbaf
      ceb51742
  6. 13 Sep, 2011 3 commits
    • Paul Wilkins's avatar
      Reverse coding order for segment features: · 1741cc7a
      Paul Wilkins authored
      Code all the features for one segment (grouped together)
      then all for the next etc. etc. rather than grouping the
      data by feature.
      
      Change-Id: I2a65193b3a70aca78f92e855e35d8969d857b6dd
      1741cc7a
    • Paul Wilkins's avatar
      Change to segment_feature_data[][] structure. · 1c24442a
      Paul Wilkins authored
      This data structure is  now [Segment ID][Features]
      rather than [Features][Segment_ID]
      
      I propose as a separate modification to make the experimental
      bit stream reflect this such that all the features for a segment
      are coded together.
      
      Change-Id: I581e4e3ca2033bdbdef3d9300977a8202f55b4fb
      1c24442a
    • Paul Wilkins's avatar
      Segment Features: · dfbc61f3
      Paul Wilkins authored
      Some basic plumbing added for a range of segment level features.
      MB_LVL_* changed to SEG_LVL_* to better reflect meaning.
      
      Change-Id: Iac96da36990aa0e40afc0d86e990df337fd0c50b
      dfbc61f3
  7. 16 Aug, 2011 1 commit
    • Scott LaVarnway's avatar
      Faster vp8_default_coef_probs · 19987dcb
      Scott LaVarnway authored
      Copies from a generated table instead of building the
      default coeff probabilities during runtime.
      
      Change-Id: I4d9551ea3a2d7d4a4f7ce9eda006495221a8de50
      19987dcb
  8. 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
  9. 20 Jul, 2011 2 commits
  10. 19 Jul, 2011 1 commit
    • Scott LaVarnway's avatar
      Moved vp8_encode_bool into boolhuff.h · a25f6a9c
      Scott LaVarnway authored
      allowing the compiler to inline this function.  For real-time
      encodes, this gave a boost of 1% to 2.5%, depending on the
      speed setting.
      
      Change-Id: I3929d176cca086b4261267b848419d5bcff21c02
      a25f6a9c
  11. 28 Jun, 2011 3 commits
    • John Koleszar's avatar
      Use MAX_ENTROPY_TOKENS and ENTROPY_NODES more consistently · b32da7c3
      John Koleszar authored
      There were many instances in the code of vp8_coef_tokens and
      vp8_coef_tokens-1, which was a preprocessor macro despite the naming
      convention. Replace these with MAX_ENTROPY_TOKENS and ENTROPY_NODES,
      respectively.
      
      Change-Id: I72c4f6c7634c94e1fa066cd511471e5592c748da
      b32da7c3
    • Stefan Holmer's avatar
      New ways of passing encoded data between encoder and decoder. · 7296b3f9
      Stefan Holmer authored
      With this commit frames can be received partition-by-partition
      from the encoder and passed partition-by-partition to the
      decoder.
      
      At the encoder-side this makes it easier to split encoded
      frames at partition boundaries, useful when packetizing
      frames. When VPX_CODEC_USE_OUTPUT_PARTITION is enabled,
      several VPX_CODEC_CX_FRAME_PKT packets will be returned
      from vpx_codec_get_cx_data(), containing one partition
      each. The partition_id (starting at 0) specifies the decoding
      order of the partitions. All partitions but the last has
      the VPX_FRAME_IS_FRAGMENT flag set.
      
      At the decoder this opens up the possibility of decoding partition
      N even though partition N-1 was lost (given that independent
      partitioning has been enabled in the encoder) if more info
      about the missing parts of the stream is available through
      external signaling.
      
      Each partition is passed to the decoder through the
      vpx_codec_decode() function, with the data pointer pointing
      to the start of the partition, and with data_sz equal to the
      size of the partition. Missing partitions can be signaled to
      the decoder by setting data != NULL and data_sz = 0. When
      all partitions have been given to the decoder "end of data"
      should be signaled by calling vpx_codec_decode() with
      data = NULL and data_sz = 0.
      
      The first partition is the first partition according to the
      VP8 bitstream + the uncompressed data chunk + DCT address
      offsets if multiple residual partitions are used.
      
      Change-Id: I5bc0682b9e4112e0db77904755c694c3c7ac6e74
      7296b3f9
    • Stefan Holmer's avatar
      Adding support for independent partitions · 4cb0ebe5
      Stefan Holmer authored
      Adding support in the encoder for generating
      independent residual partitions by forcing
      equal probabilities over the prev coef entropy
      contexts.
      
      Change-Id: I402f5c353255f3ca20eae2620af739f6a498cd21
      4cb0ebe5
  12. 07 Jun, 2011 1 commit
  13. 02 Jun, 2011 1 commit
    • Scott LaVarnway's avatar
      Removed B_MODE_INFO · 773768ae
      Scott LaVarnway authored
      Declared the bmi in BLOCKD as a union instead of B_MODE_INFO.
      Then removed B_MODE_INFO completely.
      
      Change-Id: Ieb7469899e265892c66f7aeac87b7f2bf38e7a67
      773768ae
  14. 25 May, 2011 1 commit
  15. 24 May, 2011 2 commits
    • Scott LaVarnway's avatar
      Use int_mv instead of MV in vp8_mv_cont · a39321f3
      Scott LaVarnway authored
      Less operations.
      
      Change-Id: Ibb9cd5ae66b8c7c681c9a654d551c8729c31c3ae
      a39321f3
    • Scott LaVarnway's avatar
      MODE_INFO size reduction · e11f21af
      Scott LaVarnway authored
      Declared the bmi in MODE_INFO as a union instead of B_MODE_INFO.
      This reduced the memory footprint by 518,400 bytes for 1080
      resolutions.  The decoder performance improved by ~4% for the
      clip used and the encoder showed very small improvements. (0.5%)
      This reduction was first mentioned to me by John K. and in a
      later discussion by Yaowu.
      This is WIP.
      
      Change-Id: I8e175fdbc46d28c35277302a04bee4540efc8d29
      e11f21af
  16. 12 May, 2011 1 commit
    • Scott LaVarnway's avatar
      Using int_mv instead of MV · 6b25501b
      Scott LaVarnway authored
      The compiler produces better assembly when using int_mv
      for assignments.  The compiler shifts and ors the two 16bit
      values when assigning MV.
      
      Change-Id: I52ce4bc2bfbfaf3f1151204b2f21e1e0654f960f
      6b25501b
  17. 11 Mar, 2011 1 commit
  18. 17 Feb, 2011 1 commit
  19. 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
  20. 09 Feb, 2011 1 commit
  21. 17 Nov, 2010 1 commit
  22. 11 Nov, 2010 1 commit
    • Suman Sunkara's avatar
      Use of temporal context for encoding delta updates. · b9a18344
      Suman Sunkara authored
      - Used three probability approach for temporal context as follows:
      P0 - probability of no change if both above and left not changed
      P1 - probability of no change if one of above and left has changed
      P2 - probability of no change if both above and left have changed
      
      In addition, a 1 bit/frame has been used to decide whether to use temporal context or to encode directly.  The cost of using both the schemes is calculated ahead and the temporal_update flag is set if the cost of using temporal context is lower than encoding the segment ids directly.
      
      This approach has given around 20% reduction in cost of bits needed to encode segmentation ids.
      
      Change-Id: I44a5509599eded215ae5be9554314280d3d35405
      b9a18344
  23. 29 Sep, 2010 1 commit
    • John Koleszar's avatar
      Fix loopfilter delta zero transitions · b9be7a46
      John Koleszar authored
      Loopfilter deltas are initialized to zero on keyframes in the decoder.
      The values then persist from the previous frame unless an update bit
      is set in the bitstream. This data is not included in the entropy
      data saved by the 'refresh entropy' bit in the bitstream, so it is
      effectively an additional contextual element beyond the 3 ref-frames
      and the entropy data.
      
      The encoder was treating this delta update bit as update-if-nonzero,
      meaning that the value would be refreshed even if it hadn't changed,
      and more significantly, if the correct value for the delta changed
      to zero, the update wouldn't be sent, and the decoder would preserve
      the last (presumably non-zero) value.
      
      This patch updates the encoder to send an update only if the value
      has changed from the previously transmitted value. It also forces the
      value to be transmitted in error resilient mode, to account for lost
      context in the event of lost frames.
      
      Change-Id: I56671d5b42965d0166ac226765dbfce3e5301868
      b9be7a46
  24. 14 Sep, 2010 1 commit
    • Suman Sunkara's avatar
      Changed code to remove extra read/write loops when not necessary · 00cec8f9
      Suman Sunkara authored
      Modified code so that:
      -When above and left contexts are same and not equal to current segment id, it needs to read a maximum of 2 segment_tree_probabilities.
      - When above and left contexts are different and not equal to current segment id, it needs to read only a single segment_tree_probability.
      
      Change-Id: Idc2cf2c4afcc6179b8162ac5a32c948ff5a9a2ba
      00cec8f9
  25. 13 Sep, 2010 1 commit
  26. 09 Sep, 2010 1 commit
  27. 03 Sep, 2010 1 commit
    • Scott LaVarnway's avatar
      Reduced the size of MB_MODE_INFO · 0de458f6
      Scott LaVarnway authored
      Moved partition_bmi and partition_count out of MB_MODE_INFO and
      placed into MACROBLOCK.  Also reduced the size of other members
      of the MB_MODE_INFO struct.  For 1080p, the memory was reduced
      by 1,209,516 bytes.  The decoder performance appeared to improve
      by 3% for the clip used.
      Note:  The main goal for this change is to improve the decoder
      performance.  The encoder will be revisited at a later date for
      further structure cleanup.
      
      Change-Id: I4733621292ee9cc3fffa4046cb3fd4d99bd14613
      0de458f6
  28. 11 Aug, 2010 1 commit
    • John Koleszar's avatar
      avoid negative array subscript warnings · 392a9582
      John Koleszar authored
      The mv_ref and sub_mv_ref token encodings are indexed from NEARESTMV
      and LEFT4X4, respectively, rather than being zero-based like the
      other token encodings.
      
      Change-Id: I3699c3f84111209ecfb91097c4b900773e9a3ad5
      392a9582
  29. 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
  30. 04 Jun, 2010 1 commit
  31. 19 May, 2010 1 commit