Move computing the y_mode_cdf tables per coded intra mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I8c43d09b8ef5febe2a3ec64bd51d28bd78ea73ed

Move computing the kf_y_mode_cdf tables per coded intra mode symbol to
 computing them only when the probabilities are updated.

Change-Id: I5999447050c2f7d5dbccde80bee05ecd1c5440ab

Cherry-pick Daala b5020bee:
 Remove redundant test in od_ec_decode_bool_q15().
Using a test that decodes 100M random binary symbols, making this change
 produced a speed up of 8.81% with gcc-4.9.3 and 3.71% with clang-3.7.1,
 both compiled with -O2.

Change-Id: If6d0077a56121a575ae53bcd4d1d9b7d800a317d

* changes:
  Palette: Use inverse_color_order to find color index faster.
  Rewrite some loops to avoid -Wunsafe-loop-optimizations warnings.
  Remove some useless casts
  Add compiler warning flag -Wextra and fix related warnings.
  Declare some array sizes to be constants (known at compile time).

* changes:
  Add complier warning -wunused.
  angle estimation: Some renames/tweaks to sync with aomedia code.

Change-Id: Ide4e9b3a605571ec41c265347217e103df8d0821

Handle the sub8x8 chroma component at the unit of 2x2/4x2/2x4 level
and use the motion vector inherited from the luma component. This
improves the coding performance:

lowres 0.4%
midres 0.25%
hdres  0.15%

Change-Id: I34dff4218cfa3e5d55e7ed0341f36f4719389f7e

Remove the separate implementations of set_contexts() in encoder
and decoder.

Change-Id: I9f6e9b075532faae0f74f885d9443589254258a7

Change-Id: I1da08afaa945ca1aaf4bf9f50cf649a7feef2e60

The av1_mv_class0_tree is a balanced tree with two leafs and can
 simply be coded as a boolean with probability class0[0].
If CLASS0_SIZE is ever changed from 1, this change will need to be
 reverted.

Change-Id: If294dac825a5f945371092c74aa8e3f84cd962b6

When building with --enable-daala_ec, the tx_type for intra blocks can be
 coded using the CDFs that are updated once per frame.
This patch converts a tx_type symbol to be coded with aom_write_symbol()
 and aom_read_symbol() that was missed in f3e8e267.

Change-Id: I34f8fef7525f88e156bbcb78dfc48994367610ce

Change-Id: I90ef3b49b499c2ac9c24797467cb4eb194fdf23b

The duplicate breaks build.

Change-Id: I0f16761c4bcb8563402a664013429403b883c2e1

In a previous commit: 5db9743f, two
changes that appeared to be typos are breaking build when experiments
are enabled:

../../libvpx/configure --enable-experimental --enable-ref-mv
--enable-ext-intra --enable-ext-refs --enable-ext-interp
--enable-supertx --enable-var-tx --enable-entropy --enable-ext-inter
--enable-ext-tx  --enable-motion-var --enable-dual-filter
--enable-ext-partition --enable-ext-partition-types
--enable-loop-restoration --enable-rect-tx --enable-palette
--enable-aom-highbitdepth --enable-filter-intra --enable-internal-stats
&& make clean && make -j16

This commit fixes the issue.

Change-Id: I9ce5bbc96df326214202868cb0669bd334c86851

Change-Id: I6855e18d92f693a9789eda7c91a3430566469bdd

Change-Id: I2043d635e2a7f50f84a541501f28179b797ca326

* changes:
  Add data structure of adpat_scan experiment
  Add adapt_scan experimental flag

Cherry-picked from aomedia/master: b1c3bb57

Change-Id: Icfc16070160fd9763abb1dbf5545103e62b4b9ff

For example, loops of the form:
"for (i = 0; i < 1 + max_value; ++i) ..." or
"for (i = 0; i <= max_value; ++i) ..." are possibly infinite loops,
theoretically speaking (even if practically, they aren't).
So, compiler cannot optimize those loops.

When possible, I rewrote such loops to be finite even theoretically.

Cherry-picked from aomedia/master: 4e69284b

Change-Id: Ied47a24833b689c0ec011f8645cf1c01856f7c59

Cherry-picked from aomedia/master: 6796e7f1

Change-Id: I8af087d97cadb0c2a9e37a4e4723246cdd397995

Note: some of these warnings are enabled by a combination of -Wunused
(added earlier) and -Wextra.

Cherry-picked from aomedia/master: 4790a69f

Change-Id: I322a1366bd4fd6c0dec9e758c2d5e88e003b1cbf

The av1_token encodings must match the contents of the aom_tree_index
 structures so generate all encodings from the symbol trees.

Change-Id: I37be9f12c86a02693ae3c3c1d24b00f2abb29bfb