Correct ifdef check for Visual Studio's compiler, mingw builds can use
unistd.h.

Change-Id: I25c5ee46ef75ffbff03f560293dfb3d6bed55f70

fixes fseek errors on large files resulting in corrupt/truncated output
(issue #364).

Change-Id: If0e189a1591d0e95d7d237332e0bea1cf2ec5aa1

Call the idct/add after the tokenize.  This is WIP with
the goal of creating a common idct/add for the encoder and
decoder. This move is necessary because the decoder's version
of the idct clobbers qcoeff, which is used by the tokenize.

Change-Id: I6b08d8e8397cd873647fa4fb9469884e3c876756

Added ARM optimized intra 4x4 prediction
 - 2x faster on Profiler compared to C-code compiled with -O3
 - Function interface changed a little to improve BLOCKD structure
   access

Change-Id: I9bc2b723155943fe0cf03dd9ca5f1760f7a81f54

The referenced function (SignalObjectAndWait) isn't used. Reduces the
warnings with mingw32-w64 which defines this.

Change-Id: I4ce592879ec9372bf196dac640204c4d370bd210

File not referenced from anywhere and no longer compiles.

Change-Id: I38b11bd60db615c2c2c9d7ad35caba3a1adf1750

vp8cx_mb_init_quantizer() needs to be called at least once to get
all values calculated. This change added one check to decide if
we could skip initialization or not.

Change-Id: I3f65eb548be57580a61444328336bc18c25c085b

Additional check of buffer level to ensure it doesn't exceed the
maximum buffer size.

Change-Id: I1ba4f8b09bbec89646885040ff47470196af521e

Added additional check of buffer level against maximum
buffer size.

Change-Id: Iaf1fbaf008601161e402b43ce82c3dbc129bf740

Change-Id: Id1be1a91c7f0fd286c403489ff447837029ba17f

Added code to clip the buffer level to the maximum buffer
size. Without this the buffer level would increase
unchecked.

This bug was found when encoding an essentially static
scene at 2Mb/s. The encoder is unable to generate frames
consistent with the high data-rate because Q bottoms out
at Qmin.

As frames generated are consistently undersized the buffer
level increases and does not get checked against the
maximum size specified by the user (or default).

Change-Id: Id8a3c6323d3246da50f7cb53ddbf78b5528032c6

all of googletest import (0ab00a22) was marked executable

Change-Id: Id7b7ee03efc21ab998bb03349bd91644e8af25da

Fix compiler warning for passing a non const array
to a function expecting a const array by using an
intermediary pointer and casting.

Change-Id: I9bdd358ebdc926223993fb8fb2098ffedd2f3fc7

Change-Id: I0ab00a22fbea1f38c96ef92ef7eaeda782c0c8d3

Updated eob changes to check_reset_2nd_coeffs function.

Change-Id: Id1b21c91c7f0fd286640b487ffe47867009b717d

Changed 'int eob' to 'char *eob' in BLOCKD so that both encoder and
decoder will use eobs[25] array from MACROBLOCKD structure. In future,
this will enable use of the decoder side IDCT in the encoder.

Change-Id: I6e1c011628cb8864fd4a0b80f0279ce16a5ca978

Adding support for several partitions within one input fragment.
This is necessary to fully support all possible packetization
combinations in the VP8 RTP profile. Several partitions can
be transmitted in the same packet, and they can only be split
by reading the partition lengths from the bitstream.

Change-Id: If7d7ea331cc78cb7efd74c4a976b720c9a655463

In some situations (f.g. error-resilient is turned on), vp8cx_mb
_init_quantizer() was called once per macroblock. Added checks
to avoid calculations when there is no change.

Change-Id: Ie4f0a5ade2202041254990a4e9d5b03bd1ac5aea

Fixes issue #362.

Change-Id: Iba6d7e49ed610b44c8a4c0f3d6330a93feb0373d

Prior to this fix, the clamping state of the last subblock partition
dominated, whereas the correct behavior is to clamp if any partition
needs clamping. This bug was introduced by v0.9.6-232-g6b25501b

See also:
  [1]: http://code.google.com/p/webm/issues/detail?id=371
  [2]: https://bugzilla.mozilla.org/show_bug.cgi?id=696390

Change-Id: I444db492b4c4f05f039c7da6f4216da8207dc138

It is discovered that in rare situations the 2nd order block may
produce a few small magnitude coefficients that has no effect on
reconstruction. The situations are a combination of low quantizer
values (high quality) and low energy in residual signals (content
dependent). This commit added code to detect such cases and reset
the 2nd order block to all 0.

Patch 1 to 4 used code to do all-zero-check on idct result buffer,
and tests on derf set showed a consistent gain of .12%-.14% on all
metrics.But due to a recent change Ie31d90b, the idct result buffer
is not longer populated. So patch 5&6 use an alternative method to
detect the situations. Tests on derf set now shows a consistent
quality gain of .16%-.20%.

As suggested by Jim, Patch 7&8 removed the condition of all first
order block not having any coefficient, instead we reset 2nd order
coefficients to all 0 if sum of absolute value of the coefficients
is small. So it does slightly more than just detecting the oddity
as discussed above, but tests on derf set now show a consistent
gain of .20%-.23% on all metrics.

It is worth noting here that this change does not have any effect
on mid/high quantizer range, it only affects the quantizer value
18 or blow. Within this range, the change helps compression by up
to 2.5% on clips in the derf set.

Change-Id: I718e19cf59a4fc2462cb7070832759beb9f7e7dd

Tests showed ~1.2% performance boost on the HD clip used.
Performance will vary based on material.

Change-Id: Icbcf1a828750d5b4ae5252bf596b3ef594042e8a