Modify the decoder to return the ending position of the bool decoder and
use that as the starting position for the next frame.

The constant-space algorithm for parsing the appended frame lengths is
O(n^2), which is a potential DoS concern if n is unbounded. Revisit
the appended lengths for use as partition lengths when multipartition
support is added.

In addition, this allows decoding of raw streams outside of a container
without additional framing information, though it's insufficient to
be able to remux said stream into a container.

Change-Id: I71e801a9c3e37abe559a56a597635b0cbae1934b

Tags VP9 tracks with the V_VP9 video type when writing to .webm files,
and supports decoding both from vpxdec without specifying --codec.

Change-Id: I0ef61dee06f4db2a74032b142a4b4976c51faf6e

this commit changed the asm file compiling in MSVC to use individually
customized build command line with object filename specified for each
input file. This allows object filenames prefixed with path name, and
avoid name collision in link time

Change-Id: I996098643dcadc393af57035a04bef3877f45424

Change-Id: Ib8f8a66c9fd31e508cdc9caa662192f38433aa3d

Rather than building an object file directory heirarchy matching the
source tree's layout, rename the object files so that the object
file name contains the path in the source file tree. The intent here
is to allow two files in different parts of the source tree to have
the same name and still not collide when put into an ar archive.

Change-Id: Id627737dc95ffc65b738501215f34a995148c5a2

Update decode_coefs() to break when c >= eob, since it's possible that
c starts the loop from 1 and eob is 0. The loop won't terminate in that
case.

Add new get_eob() function to consistently clamp the eob based on the
segment level EOB and the block size. It's possible to code a segment
level EOB that's greater than the block size, and that leads to an
out of bounds access.

Change-Id: I859563b30414615cf1b30dcc2aef8a1de358c42d

* changes:
  Segment mode coding bug.
  Silenced a few warnings.

Change-Id: Ia24e0fddcca9125f8e41e95dbb22444dc51767c7

Change-Id: I8e12fbab7ec4732b6400ae3a6964749d818c90c9

Change-Id: I478878c78ef8a770186622d987d318176827ef5f

This is in line with other cases where we disable ADST if prediction
size and transform size don't match. Before this patch, the RD loop
will use ADST for superblocks, but frame encoding/decoding won't.

Change-Id: I700368c632eb72b5e089c22ef25649d99d7697d0

There are now more than 16 possible modes so 5
bits required for segment mode feature.

Note that it is likely that the mode feature and how it is
coded will change but for now the 4 bits was a bug.

Change-Id: I63348ae3a9cc31566a656c2dc78f09f5e1a9dcc9

Silenced a few VS compiler warnings.

Change-Id: I658ea409c36c05cd11042675e2e42ccde0ef2420

If the SEG_LVL_MODE is an intra mode, then the reference frame must be
INTRA_FRAME.

Change-Id: I2cdeeac3780c077c74b39ce89a528bc280674231

Change-Id: I7b6f27826052eb706fc6080d4e3a940dff7d3a58

This fix ensures that the forward prob update is not turned off for
motion vectors.

Change-Id: I0b63c9401155926763c6294df6cca68b32bac340

Change-Id: I417e39867c020a17d85370972446a8ce2bbe9a6d

Change-Id: Ia1eddb108ec463835e9de8769572d698e21bca49

This change is a fix / extension of the newbestrefmv
experiment. As such it is presented without IFDEF.

The change creates a new context for coding inter modes
in vp9_find_mv_refs(). This replaces the context that
was previously calculated in vp9_find_near_mvs().
The new context is unoptimized and not necessarily
any better at this stage (results pending), but eliminates
the need for a legacy call to vp9_find_near_mvs().
Based on numbers from Scott, this could help decode
speed by several %.

In a later patch I will add support for forward update of
context (assuming this helps) and refine the context as
necessary.

Change-Id: I1cd991b82c8df86cc02237a34185e6d67510698a

Experiment to test speed trade off of reducing the
extent of the ref mv search.

Reducing the maximum number of tested candidates to 9 had
minimal net effect on quality in any of the tests sets.

Reduction to 7 has a small negative impact (worst was STD-HD
at about -0.2%).

This change is in response to the apparently high number of
decode cycles reported in regard to mv-ref selection.

Change-Id: I0e92e92e324337689358495a1ec9ccdeb23dc774

Change-Id: I962be949845f881df551d101708e6ba9d8a3d6a2

This fixes encoder/decoder mismatches with the superblock experiment
turned on whenever a superblock is encoded using the 4x4 transform.

Change-Id: Iefec7055e8d25f8efdbba66c4261bbd322d335a3

This should prevent inconsistent results between identical encodes with
the superblock experiment turned on.

Change-Id: I41a005fae53f2eb59736cc70041185fb7d63cfca

Preliminary patch on a new 4x4 intra mode B_CONTEXT_PRED where the
dominant direction from the context is used to encode. Various decoder
changes are needed to support decoding of B_CONTEXT_PRED in conjunction
with hybrid transforms since the scan order and tokenization depends on
the actual direction of prediction obtained from the context. Currently
the traditional directional modes are used in conjunction with the
B_CONTEXT_PRED, which also seems to provide the best results.

The gains are small - in the 0.1% range.

Change-Id: I5a7ea80b5218f42a9c0dfb42d3f79a68c7f0cdc2

Missing eobs agrument in vp9_dequant_idct_add_16x16_c

Change-Id: I826b1afa0a4ee6398f7373325aa0c75e6a866937

The altref frame is packed along with the next P frame. So that
outside of the codec there are now only two types of frames P and I.
Also, now it is one frame in and one frame out with respect to the
codec. Apart from that, all the frames are length encoded with the
length of each frame appended to the frame itself. There are
two categories of frames and each of them will look as follows:

  - Packed frames (an altref along with the succeeding p frame)
    - altref_frame_data | altref_lenngth | frame_data | length
  - Unpacked frames (all frames other than the above)
    - frame_data | length

Change-Id: If1eabf5c473f7d46b3f2d026bd30c803588c5330

Change-Id: Id23917ce2555519d2e9172dd6ce3a283f2235d26