This experiment has been adopted, we can simplify the code
by dropping the associated preprocessor conditionals.

Change-Id: I02ed47186bbc32400ee9bfadda17659d859c0ef7

Make it explicit that:
- forward tx is using the matrix
- inverse tx is using the transposed matrix

Change-Id: Ia9507f4f68397b07b6fd1868bb421bb9d5dd817d

Change-Id: I3cc9cb8135ec5e8aa20c8cff901a2f37b3b459ee

Change-Id: I0b67ad4f37a22812472b191e0a6f1d218430c454

This test makes sure two things:
1) txfm stage range is within desired limit
    (lbd:16 bits hbd:32 bits)
2) txfm stage range + cos bits is within desired limit
    (lbd:32 bits hbd:32 bits)

Change-Id: Ie2cc3c8265810e034c1461def4717fa9d4c29945

BUG=aomedia:430

Change-Id: I1e6fc42163b94f221d3010f00bb5e085707687c8

Change-Id: I82580120a154ecd7c41f4cd9bc0f8c669fca7774

Cherry-Picked the following commits:
0defd8f2 Changed "WebM" to "AOMedia" & "webm" to "aomedia"
54e66767 Replace "VPx" by "AVx"
5082a369 Change "Vpx" to "Avx"
7df44f17 Replace "Vp9" w/ "Av1"
967f722f Remove kVp9CodecId
828f30ce Change "Vp8" to "AOM"
030b5ffc AUTHORS regenerated
2524caee Add ref-mv experimental flag
016762be Change copyright notice to AOMedia form
81e55269 Replace vp9 w/ av1
9b94565b Add missing files
fa8ca9f2 Change "vp9" to "av1"
ec838b76  Convert "vp8" to "aom"
80edfa01 Change "VP9" to "AV1"
d1a11fb9 Change "vp8" to "aom"
7b582513 Point to WebM test data
dd1a5c8d Replace "VP8" with "AOM"
ff00fc0f Change "VPX" to "AOM"
01dee0bb Change "vp10" to "av1" in source code
cebe6f0c Convert "vpx" to "aom"
17b05679 rename vp10*.mk to av1_*.mk
fe5f8a8a rename files vp10_* to av1_*

Change-Id: I6fc3d18eb11fc171e46140c836ad5339cf6c9419

Manually cherry-picked commits:
ceef0583 libvpx->libaom part2
3d26d916 libvpx -> libaom
cfea7dd7 vp10/ -> av1/
3a8eff73 Fix a build issue for a test
bf4202ed Rename vpx to aom

Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc

Change-Id: I1138fbeff5f63beb5c0de2c357793da12502d453

Change-Id: I368d365ee0f58373bc399b615febd790addb2c36

Change-Id: Ibaf7b00bfe247df3e665ea3a0241667cb130e16c

Will add unit test to test/vp10_fwd_txfm2d_test.cc later

Change-Id: I626900c67fca4eee2ad0ae1828188527a04a5362

This change has no performance impact. It prepares the proper
function interface for better performance optimization.

Change-Id: I12e2f2deaf7f3adc603de0a74852116468c762f6

  Unit test shows manually developed SSE4.1 code would performs ~30%
  better if TXFM_2D_CFG configuration is set in lower level. This
  change only updates function signature. There is no performance
  impact.

Change-Id: I62692bd50a21ffc8a944bbd6c155c0a2020ad77b

Change-Id: I151b18b38f7a000fb6e431cd42675ac4e7e9e3ca

Change-Id: I32ff059143d777fa4518d8e404ff16c890c7fecb

And enabled the warning flag in configure for vp10.

Change-Id: If556d6fac65755af3d6ed7fe71b8eca0ef1b1965

Added _USE_MATH_DEFINES to make sure M_PI can be refered to definitions
in math.h for MSVC

Change-Id: Idca128910384593a002eb08bae72c739fb998e19

Change-Id: If3bef2be355227cfc2932e4471b84c21c7cd2b90