The test encodes 5 frames of a video using the --monochrome flag and
verifies that the decoded frames satisfy:

- each frame's monochrome flag is set to 1
- each frame's U and V planes are set to a constant, and this constant
  is the same for all decoded frames
- the initial frame's Y PSNR value is 'high enough'
- the Y PSNR values remain fairly constant across all of the frames

Change-Id: I4239ddfb745ed9746547737b4bc99963c71e51c0

Encoder: Prior to this patch, some chroma data was calculated and
later discarded when in monochrome mode. This patch ensures that
the chroma planes are left uninitialised and that chroma
calculations are not performed.

Decoder: Prior to this patch, some chroma calculations were still
being performed in monochrome mode (e.g. loop filtering). This
patch ensures that calculations are only performed on the y
plane, with the chroma planes being set to a constant.

Change-Id: I394c0c9fc50f884e76a65e6131bd6598b8b21b10

Some array elements were defined and left uninitialised. This wasn't causing a
problem, as the elements were later ignored, but it did cause Valgrind to
produce warnings.

The function now initialises the full array immediately after its definition in
order to quiet these warnings.

BUG=aomedia:1244

Change-Id: I5083f1f4008cb3ab70a4af4d1d2573dee8793303

Can reduce decoder runtime by about 7 percent.

Change-Id: I4ee3eea9de867d065d03a176f242e286a4899004

Change-Id: I33bb6e902e3be2847ae8101199d9cbd0e1e5c38d

By avoiding break CPU's pipeline,
this patch achieves a small encoder
speedup at the range of 0.2%~0.71%.

Change-Id: I398cb09f8eb91695e3258091ff2f82f06ab74145

explicitly disable segmentation when ref frame has different
resolution

BUG=aomedia:1205
BUG=aomedia:1223
BUG=aomedia:1256

Change-Id: I6db51116db308514d572eb465c2453403e64e1f2

This also avoids a UBsan warning of "left shift of negative values".

Change-Id: Ifb8d74218b1c0bc7b924e752442de0ba1b50a869

DC_PRED requires dividing by 'count' = block width + height.
- For square blocks this is efficient, as count is a power of 2.
- But for 1x2 and 1x4 rectangular blocks the division is inefficient.

So, we approximate this division with an integer multiply and a shift.

test_intra_pred_speed test results:

Size    Before (ms) After (ms)
4x8     221         206
8x4     195         189
8x16    121          88
16x8     84          73
16x32    63          60
32x16    68          66

Compression quality is neutral:
- Division vs 32-bit mult + shift is neutral:
https://arewecompressedyet.com/?job=ALL_rectpred_bef%402018-01-10T19%3A02%3A20.745Z&job=ALL_rectpred_aft_mult_shift%402018-01-10T19%3A04%3A21.380Z
- And 32-bit mult + shift vs 8-bit mult + shift is also neutral:
https://arewecompressedyet.com/?job=mult_shift_32bit%402018-01-16T20%3A30%3A21.418Z&job=mult_shift_08bit%402018-01-16T20%3A31%3A25.673Z

BUG=aomedia:1191

Change-Id: I2343a055bc3d85cb7be7652d7a6db1b768361be9

Change-Id: Iadaa189717787dbb82e485ff92125ee1ef591496

Add command to remove CMake outputs that will cause problems
after moving to a new directory.

BUG=aomedia:1217

Change-Id: Ia485772d907b7cb6b84d948f288dc0ce24802499

This extra entry has been introduced in 3ebb0d00
but is not needed.

Change-Id: I22801b2a0677dd5c381175f2fc6d9e86dde1594e

Change-Id: I591badb15e714e23f2c8a2c2df8514fdd75fc880

Change-Id: Ic6706ee6c39cb54ad2f746f05e80fbc6a0af88e0

The original order of operations lead to all variables upgraded to
unsigned int during computation, and enc->cnt being negative then
would cause UBsan warning.

Change-Id: I658b6f4c903472b82e178033eac2463045c42233

Can improve decoder run time by 15-20 percent.

Change-Id: I6e0ab0ce46f3620129460046cc21d99fb957adb5

It has been provisionally adopted for over a month now.

Change-Id: I717188c5b6ffa449440f253b1dede97c70fff510

Change-Id: I4f6ecb4cdd60b9ab12a403371744710be9a59f46

Use HTTP instead of HTTPS to avoid requiring CMake builds with
HTTPS support.

BUG=aomedia:1253

Change-Id: I1c130496ae3ec9ea43629117e3f3f46048a32b92

Change-Id: I4d201631e288ca0f5a0d13583707dff483eb5cac

Change-Id: If47ac212044a977b12c8df1322759d173dd29ed5

Change-Id: I50f3bec3bb67ab47a97d2731a7d2afcb4da5139a

A function to calculate chroma prediction mode info. rate cost for
intra blocks.

Change-Id: Ia71c492284675568db609dfa9ed3b5901f021027

Move the "largest tile size" value from read_tile_buffers()
into the AV1_COMMON structure, so that it can be preserved across
calls. Additionally, only reset the largest tile id once per frame,
rather than once per tile group.

BUG=aomedia:1245

Change-Id: Ia9b96047bcd4e72b1bed24f78d2914505686262c

* Remove aom_config.h include from aom_image.h
* Unconditionally include API additions in the header

Change-Id: I57e4014bb255789cc1052ed1adc38d76ca6ad9a0

This does not change the precision used for od_ec_enc_bool_q15
(used by aom_write and aom_write_bit), which means these two
paths will use different CDF precision for now.

The test that verifies that q15's code identically to CDFs
is disabled.

Change-Id: I4cd40a60d472eb58f37ac4fda1056b5dfe8b39a5

Change-Id: I69e07309b708caa59c313ae2156828d8c089cf4d

BUG=aomedia:1247

Change-Id: I53582471a5f75be26f843860914ab210f3230d5e

Creation of the testdata target was previously guarded by
ENABLE_IDE_TEST_HOSTING. This change ensures the testdata
target is always available.

BUG=aomedia:1243

Change-Id: Ief47d4c16c3718b15505e8bc63b519d0c4dbc0ae

BUG=aomedia:1243

Change-Id: Iaa3b239cf78d62432f61ad166e9c242519f6530f

Change-Id: Ifd163fd9a6eee25344f5e18e859de01181e1e48a

A function to calculate luma prediction mode info. rate cost for
intra blocks.

Change-Id: I285518dc34c0ffa58bdcd09e76463c21240336e1

encode_with_recode_loop() may encode a frame multiple times with
different q-index values. delta_q/lf_present_flag need to be
initialized every time.

Change-Id: Iee4891c9c52a06416afdb30360e377462ef85f22

Change-Id: Ib2cb09cf335352b4d0a63d3ba35a9c9f4b35b881

Change-Id: I0cd3de4a5673003f9fbe9c615e139e8133a99dcc

Change-Id: Icfdd68247543daf7884454c450d50ff95ae20712

When it is the last coeff, we don't have to search for the cost of
making it as the last signficant coeff.

Reset has_nz_tail when new eob is found.

Speed impact: ~2% improvement
PSNR: 0.01%

Change-Id: I0429d3506be30431c3e7108fb1d011930a52c419

Negative distortion is used in trellis quant process for RDcost
computation, this change avoids compiler warning on "left shift
of negative values".

Change-Id: Iaea0ffebb6c9236e779e36301fbc69b180be1f3d

Change-Id: I8bb21fbbc3366690ccc13a9b31a6726dfbfa2ff4

Initialize all the 3 planes even if the video is monochrome.
There were some unintended consequences with initializing
only the luma plane for monochrome videos, which will be
resolved subsequently.

Change-Id: Id57445e3a5a62605511220600e749e662d080b49