This patch fixed the issue reported in "Issue 655: remove textrel's
from 32-bit vp9 encoder". The set of vp9_subpel_variance functions
that used x86inc.asm ABI didn't build correctly for 32bit PIC. The
fix was carefully done under the situation that there was not
enough registers.

After the change, we got
$ eu-findtextrel libvpx.so
eu-findtextrel: no text relocations reported in 'libvpx.so'

Change-Id: I1b176311dedaf48eaee0a1e777588043c97cea82

Removed three members from the VP9_COMP data structure:
inter_zz_count, gf_bad_count, gf_update_recommended.

These were part of the VP8 real-time mode implementation
that was removed from the initial VP9 codecbase.

Change-Id: I866b083b88ef02c74837277d50ce532ca88492f3

Update best_inter_rd and best_inter_ref_frame only in single ref
frame case.

Change-Id: Id56825b231a62d6852bd83811410c05a7569f715

removes a textrel for sh_b23456789abcdefff

Change-Id: I80cb9dfd8e49a0fe884c8ff76472275b3a00cb57

We don't have to calculate 'new' probability in convert_distribution()
because it is enough to calculate only 'new' counters which could be used
to calculate probability if necessary. That's why removing a lot of unused
temporary probability arrays and reducing number of get_binary_prob()
calls.

Change-Id: I4e14eb7203d1ace61bbddefd6b9b6326be83ba63

Also removed unused declaration related 6 tap filter

Change-Id: Ic17f516141d885157918505f4204081e4c951fad

1. Reduced the size memset based on eob for 32x32 transform. The reset
of non-zero coefficient should probably go into where they are read in
inverse transform functions. (TODO)
2. Removed a redundant level of indirection.
vp9_iht4x4_add() checks transform type and call vp9_iht4x4_16_add()
for tranforms other than DCT_DCT. In this case, the DCT_DCT case
has been already handled here.

Change-Id: Iacbc77da761f0b308df5acea0f20c9add9f33d20

Change-Id: I529c634db4f81ba5386092c126f53312b1e51b2b

Making code easier to read and avoiding calculation of skip context twice.

Change-Id: I42c376b1a1811bc842bf6420bf81d2de7a1bf980

Change-Id: I12c67c8c0fa1aa7fb3f7d6cc2ef65be29c4ea292

The change doesn't affect the bitstream. It changes the order or function
calls and affects how we reconstruct intra- and inter-blocks. Speed up is
about 1...1.5%.

For intra-blocks:
  Before:
    for each transform block read tokens
    for each transform block do prediction
    for each transform block do inverse transform
  Now:
    for each transform block
      read tokens
      do prediction
      do inverse transform

For inter-blocks:
  Before:
    for each transform block read tokens
    for each transform block do inverse transform
  Now:
    for each transform block
      read tokens
      do inverse transform

Change-Id: I12a79bf1aa5a18c351b8010369bd3ff1deae1570

This CL contains two AVX2 optimized loop filter functions,
mb_lpf_horizontal_edge_w_avx2_8 and mb_lpf_horizontal_edge_w_avx2_16.

Change-Id: I604e4fe6e99752b7800c2ea98721d97f7e0b931b

   -Don't reduce maxQ for gold/alt in CBR mode.

   -Fix to min/maxQ for first/initial key frame.

   -Add more speeds to datarate test and reduce the starting bitrate for test.

Change-Id: Id2a333d76dd3f6a51b322ca984588e2a22159c58

Change-Id: I9781a62bc1a4cd9176554d1271d87dbcafda9cb0

This commit makes zcoeff_blk cache the case where the entire block
is quantized to be zero (without applying zero-forcing) in the rate-
distortion optimization loop, and skip the forward DCT, quantization,
inverse DCT, and reconstruction process in the encode_block stage.

It now works for all the block sizes, including sub8x8 blocks.

Change-Id: I5ae60a9c436ba3637d11666733554bec4580ef98

Both decode_modes_sb and decode_modes_b had conditions to immediately
return at the beginning. Eliminating these conditions here and calling
these functions only to do a real work. Also unrolling loop for
PARTITION_SPLIT.

Change-Id: I2fc41cb74ac491f045a2f04fe68d30ff4aaa555d

fixes a crash in assembly on 32-bit linux/windows

Change-Id: I0c27e6c0ece9732b5eb2ee5b59ff42c3c8016c50

"<< SUBPEL_BITS" needs to be added in the calculation. Call
set_scaled_offsets() to calculate x_offset_q4 and y_offset_q4.

Change-Id: Ied130ea771510e918f51cd1dc3abe57f4c0962b5

tiles are decoded in parallel within a single frame

Change-Id: I7aca87cb1c239b74eceef72bdc9f672faebac373