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Scene detection is used for VBR mode and for screen_content mode.

It was also enabled for CBR mode via the speed condition,
but currently the analysis in the scene detection is not used
in CRB mode (similar computations are done locally at superblock level
when the source_sad feature is enabled).

For 1 pass code.
No change in behavior. Small speed gain, ~0.5%.

Change-Id: I59991d7ef2af320bea7af4b907596e057affa42f

BUG=b/64710201

Change-Id: Ia518af5494a42e80949cf1165244fbed59606cf7

The speed condition is not needed, feature can used for any
speed in 1 pass code.

Change-Id: I878ef3f63a075302eda48c0343fa243c80aab9ba

To be used for 1 pass VBR.
Off by default in speed features.

Change-Id: I5d6110d6d191990db526fe68ec9715379a4d1754

BUG=webm:1419

Change-Id: I39c8033734562efc0ac0e28e7f06fa05130f9b96

* changes:
  cosmetics: NEON scaling code
  Refactor convolve NEON code
  Refactor convolve code

1. vp8_copy_mem16x16_mmi
2. vp8_copy_mem8x8_mmi
3. vp8_copy_mem8x4_mmi

Change-Id: I3de29a11fa7402df0e48bbb944440b1e66498a65

Set it as default to 900.

Change-Id: Id2d990925dccff1f6762411c66ea95973440c92f

C vs SSSE3 speed gains:
_4x4 : ~2.45x
_8x8 : ~10.61x
_16x16 : ~11.34x
_32x32 : ~6.36x

BUG=webm:1411

Change-Id: Ic91389a4f1a8ad093f498afe53765b897fb9be09

* changes:
  Remove the unnecessary cast of (int16_t)cospi_{1...31}_64
  Remove the unnecessary upcasts of (int)cospi_{1...31}_64
  Change cospi_{1...31}_64 from tran_high_t to tran_coef_t

Add the condition frames_since_golden > 0 to the
early exit check for ARF usage in nonrd_pickmode.
This improves quality of first frame following ARF, where
frame_since_golden = 0.

Small/neutral gain in metrics for speed 6, neutral change in speed.

Only affects when USE_ALTREF_FOR_ONE_PASS is enabled.

Change-Id: I82e73e6ff6fc849e5ca5448563cb8a0515fe0cdc

BUG=webm:1450

Change-Id: If59743aafe99226e0ec67ab5d20678ce25f53ab8

BUG=webm:1450

Change-Id: Ib046fe28caec5b9ebdc9d0152df7c54ff4266858

The unnecessary upcast to (int) will be cleaned later.

BUG=webm:1450

Change-Id: Ia234575206d5a74540526924b06ed3939322d063

A new bug was introduced in a80bdfd0 "Change sinpi_{1,2,3,4}_9 from
tran_high_t to int16_t". Reverted the change in this file.

BUG=webm:1450

Failed test C/TransHT.AccuracyCheck/26.

Change-Id: Id001f57aad811803ef7d367d2b2bc008d8499991

quiets nasm warning:
label alone on a line without a colon might be in error

BUG=webm:1462

Change-Id: I660407ca60e8c9a810dba9d76afb65852029a29c

Change-Id: Ib91054622c1f09c4ca523bc6837d7d8ab9f03618

Rename a couple of hbd static functions.
Move the position of NEON function convolve8_4().

Change-Id: Idfac00edf2e99cdd8e0a73b9f895402f60be6349

Extract a couple of static functions into their caller functions.

Change-Id: If8d8a0e217fba6b402d2a79ede13b5b444ff08a0

C vs SSE2 speed gains:
_4x4 : ~2.94x

C vs SSSE3 speed gains:
_8x8 : ~8.69x
_16x16 : ~6.32x
_32x32 : ~5.33x

BUG=webm:1411

Change-Id: I2c35b527eac2229f17aaa9d118fb601e7195efe4

Modify simple_block_yrd condition in nonrd_pickmode for SVC:
allow it to be used also on base temporal_layer, only when
spatial_layer > 1 and block size < 32x32.

Speed up of about ~2% for 3 layer SVC, with little/negligible
loss in quality.

Change-Id: I7734bdae51cf51f22b96f6b2b27da20ea1d84344

Fix the setting to frames_till_gf_update_due, and
adjust the limit value.
Only affects when USE_ALTREF_FOR_ONE_PASS is enabled.

Neutral change to metrics and speed for ytlive.

Change-Id: I266d9a00b36221bc8602fa2746d4e8a8f7d4dfae

Only when USE_ALT_REF_ONE_PASS is enabled (off by default).
Force fixed partition to 64x64 when is_src_alt_ref_frame is true,
and don't force early exit for some modes in nonrd_pickmode
for ARF noshow frames.

Small gain ~0.2% on ytlive metrics for speed 6.
Neutral speed difference.

Change-Id: I27eb6622d0453c09a06ccdc3b16368762474d11d

Add "typedef int16_t tran_coef_t;"

BUG=webm:1450

Change-Id: I67866f104898d1dda8989e1abdaf6983fe324154

Add datarate test, for both VBR and CBR mode, with the
frame_parallel_decoding mode disabled (and error_resilience off).

Change-Id: I54feec3248a68ecff4bef8d9a31bb1616fab77df