This commit re-structures the speed feature setup for the codec
development purpose. Instead of progressively reducing encoder
complexity at the expense of incremental coding loss, we allow a
separate set of speed features, each corresponds to a certain
category of coding units:

1 << 0: transform coding
1 << 1: inter prediction
1 << 2: intra prediction
1 << 3: block partition
1 << 4: loop filters
1 << 5: rd early skip

[6 - 7] are left open for next adjustment.

It is constructed to facilitate the codec development purpose.
When working on a coding functions, one could choose to turn on
one or more less related coding units to speed up the evaluation
process. For example, to test a transform related experiment, one
could set
--dev-sf=2, 6, or 22
which corresponds to turning on:
2 - inter prediction speed features,
6 - both inter / intra speed features,
22 - inter / intra, and loop filter features.

The goal is to allow faster experimental verification during the
development process. With the experiment in a stable state, we
can evaluate its performance in speed 0 at higher confidence level.

Change-Id: Ib46c7dea2d2a60204c399dc01f10262c976adf0d

When this is set (use --monochrome), all decoded frames
will be given constant chroma planes.

If the rawvideo option is used in conjunction with the
monochrome option (i.e. --monochrome --rawvideo), the
written output will only consist of the Y (luma) plane.

Change-Id: I967817f1c3ebb1162fa9771b51cf6431120b835c

This commit resolves the inter mode context model dependency on
the reconstructed motion vectors.

Change-Id: I3fd885dba6c10be8b1dcd072c1a5b3925ef4d1f5

remove tmp0 in update_cdf due to the use of EC_MIN_PROB introduced by
Thomas Davies.

further changes to update_cdf include:
1. Start the rate at 3+get_msb(nsymbs) and increase the rate by one at
counts 16 and 32.
2. Check if tmp is less than cdf[i] to avoid shifting a negative number.

Change-Id: I5088ebd450d6e57ec6c3e92bb2f47a078489b947

Change-Id: I2ad279d27fb34c9c6bcee6029a40377541f066a7

TX64X64 uses 32x32 coeff buffer

Change-Id: Ied4279807207176d590af4c1fc4bb648a618d158

Change-Id: I717bcec45e061e9685c00282f1c2a4d53a3481ef

This will make txk_sel support maximum bsize to 128x128

Change-Id: I33941966cb1ae4406ac68a2124c859c833a084d8

Change-Id: I72a01937abc3ad5a1ddd5f5ef1ea79e2320343ad

This 8-point Type-IV DST uses the same computation graph as the
 asymmetric 8-point Type-IV DST with the following changes:

  - The fDST and iDST contain different multiplication constants
  - The fDST does not reuse the passed shifts in the first additions
  - The iDST does not have any OD_RSHIFT1(t_) on the last additions

This reused computation structure could be later pulled into a macro or
 exploited by a hardware implementation.

Change-Id: Iac09c29549ce5dcf7752f71e9e6d24609e7b018a

This is a work in progress. So far this tool supports only
reading of OBU headers with and without extensions. OBU
payload parsing will be added in future commits.

Change-Id: Ie4c184ad4ae8e536e00015e9bde6a7cde8dada28

Change-Id: I64eccc4ce8f2a0f6884bb6f35f4b74ce00b25a30

subset-1:

daala_tx@2017-12-02T19:45:07.284Z -> new_dct16@2017-12-02T20:45:01.824Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0179 | -0.0640 |  0.0507 |  -0.0464 | -0.0246 | -0.0304 |    -0.0122

Change-Id: Id9f90f1cec7f0948d456c7b0b3564c0b2bd1ac3c

Change-Id: Ida7e054d3e8eedc9e134f0a595072c8cd50e74f9

Change-Id: Ifa0b0c56fd1454d6c856486c96092ed1d3f1b4b9

Change-Id: I57e6cd7ca71e975082b1431b0cf80d080cabeb9b

Adds various tables, scan patterns etc. for 16x64 and 64x16
transforms.
Also adds scan tables for previously missing 4:1 transforms
for intra.
Also adds missing CDFs for filterintra with tx64x64.

Change-Id: I8b16e749741f503f13319e7b7b9685128b723956

The lossless mode special-case that dispatches out to the inv 4x4 WHT
transform in Daala TX had the HDB and LBD dispatch cases backward due
to a rebase error.

Change-Id: If77b298834b1a51348fe08702a5144ea5b66df71

Change-Id: I6a384bf0b5adcdbc22d67a08a9d99a0bed1fdd6d

It was wrong when ext-partition is on and sb_size=64, potentially causing
big compression loss.

Change-Id: I39cba439811bc0ab7c5532842887cf82bb3b5657

- OBU_TD => OBU_TEMPORAL_DELIMITER
- METADATA_TYPE => OBU_METADATA_TYPE
- Prefix OBU_METADATA_TYPE enum vals with "OBU_".

BUG=aomedia:1046

Change-Id: I0c63d36b77905520e427e6b77fbf4cbedabc7e51

Modified the warped motion mode context based on neighbor's motion modes
and current block's mode.

Change-Id: I77ca35fab37ec640bb38661ff1799f643d5aafdc

subset-1:

new_dct4@2017-11-27T20:52:07.119Z -> new_dct8@2017-11-27T23:57:04.520Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0030 |  0.0566 | -0.1127 |  -0.0244 | -0.0078 | -0.0154 |     0.0026

Change-Id: I1fde36a5ed454a50acf81004a618fc0a0c8c9073

subset-1:

master@2017-11-27T19:24:03.517Z -> new_dct4@2017-11-27T20:52:07.119Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
-0.0113 |  0.0459 |  0.1285 |   0.0085 | 0.0005 |  0.0093 |     0.0352

Change-Id: I0a76037ea2a08071ca9c4013979cca3ee3efe55c

Change-Id: I7f108fce272b5bf416836d99430f07af801daada

Although four bits are enough to represent current distances since
Golden Frame Group is 16, for flexibility, we use 5 bits and allow
frame distance up to 32.

BUG=aomedia:1072

Change-Id: I9f413baffd656eb8bd54333ba31a4e33faefd57a

And do so unconditionally: It's harmless to allow the
types to be defined without CONFIG_OBU enabled.

BUG=aomedia:1046

Change-Id: I5b9a3a68e4e70b07137e381f05345d2ea609a09a

Multisymbol BR coding is simplified as follows.
1. Remove computation of level counts by using a template of size 8;
2. Context is derived by using a template of size 3.
3. lps and eob probabilities are trained.
4. Share contexts between TX_16X16 and above.

The number of probability values used in BR coding are reduced from 1152 to 378.

Change-Id: I0419127e871f9e566c2489aa4b1825c5364aec5a

Add a block level usage flag for skip mode. If no block has chosen the
skip mode, the frame level flag for skip mode will be set off.

This patch also includes a small code cleanup, including the check on
whether the best RD mode is aligned with skip mode, if yes, the best
RD mode will be replaced by skip mode.

This patch slightly improves the coding performance of ext-skip.

Change-Id: If06092d5e32f15e63dcb5f35d32e68bc0f827c2b

Change-Id: I584694374a2468e0dcfe6e4fdb2582e5cae051ef

Change-Id: I671009d26c7be031b0f742ae9cf841233edbc4c8

This produces a 0.03% drop in performance but reduces
the tx search space.

Change-Id: I27ae62403f059c4654e9237c39f15bed7f860c15

Add counters and newly trained initial probabilities for coefficient
coding.

Change-Id: I2647303c639b60018b8caacfefce77be26cae92c

Change-Id: Id6127524a02d308072408b3c3af0e4c604e5f527

Change-Id: I891a331ca7c8c59f493ecfe460a96de07e6537a1

Change-Id: I763e844875680961d9550bfd39a61a9caf2727b5

Record the best_txk_type in calc_rd_given_intra_angle()

Change-Id: I174709096d019d31567517b5aec6c2858ee68bc3

If the frame's monochrome flag is set, the decoded frame
will be given constant chroma planes, regardless of any
chroma data in the original frame.

Change-Id: I9ea078f02c279ae9ec1d23cc33f69c6abcb18b9f

Change-Id: I6eca9ab77cf48c5b027319a25c59b36b9c0c4313

Change-Id: Id695bbe1ac37750b98c144685c9a9fd3ab5ae091