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

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

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

Change-Id: Icbcf1a828750d5b4ae5252bf596b3ef594042e8a

Update ARM asm implementation of vp8_start_encode to new definition.

Change-Id: Ic44791c969e351082331ba6146c3384c01a0dfad

Small performance gains.

Change-Id: I709b9390a8a27a70f5f23574313b8db85ac7f23d

Interleaved vp8_find_near_mvs and vp8_mv_ref_probs.
2.5% to 4% performance improvement for the HD clips used.

Change-Id: Id888b667cf5ae2f0e19da18743140f055ff7de8d

The partial frame copy function used to copy an extra 8 lines above
and  below. The partial frame filtering can only modify 3 pixel rows
above the partial frame. Reduce copy to bare minimum needed, which is
4 lines, so that partial filtering on copied frame is possible.

Define the "magic" fraction number for partial filtering in
loopfilter.h .

Change-Id: I4791ffc541b6884b12759a0d0714a8faf16147ec

Restructure if statement to clarify the error condition. Trigger the
error before clobbering pc-> variables.

Change-Id: Id01cab798a341ce9899078fdcec265a0e942a0b7

Change-Id: I4fcd6e4656d9823aead941616cd63501aecbd6e2

Global function pointers can not be defined in header files. Restructure
vpx_scale pointer configuration.

Change-Id: I6f568a263ad770d32f530abad6007f990fd1003a

Decode the mv mode with if-then-elses instead of traversing
the vp8_mv_ref_tree data structure.  This will make it
easier to interleave vp8_find_near_mvs and vp8_mv_ref_probs.

Change-Id: I1e798d6ec40fcaeeff06ccc82f81201978d12f74

into a function.

Change-Id: Ia023a0587100a52cb084f5d9d5512efa6198dad3

Did some cleanup as well.

Patchset 2:  Fixed bug.  Will revisit the segmentation logic.

Change-Id: Idf9fbcff9aaf467bdace9fbd58ef2cea6c602049

DETOK structure is not used anymore.

Change-Id: Id22e1af78fb85d4bb151237a60290d9364faf217

Applies to generated files with c, h, and mk extensions.

Change-Id: Id82c46673c7aad43e95a9de5058ddcfc6fd72f14

check to make sure that cx_data buffer has enough room before
writting to it, prior behavior did not which could result in a crash.

Change-Id: I3fab6f2bc4a96d7c675ea81acd39ece121738b28

During the _pick only the Y plane is examined. In addition, data beyond
the borders of the frame is not read.

Change-Id: Ic549adfca70fc6e0b55f8aab0efe81f0afac89f9

Tests showed over 2% improvement on various HD clips.

Change-Id: I94a30d209c92cbd5fef285122f9fc570688635fe

sizeof(unsigned long)=4 in 32-bit builds

Change-Id: I81c9d698c80ffaa332214e5b43e98b4e30cf9e88

Instead of using the predict buffer, the decoder now writes
the predictor into the recon buffer.  For blocks with eob=0,
unnecessary idcts can be eliminated.  This gave a performance
boost of ~1.8% for the HD clips used.

Tero: Added needed changes to ARM side and scheduled some
      assembly code to prevent interlocks.

Patch Set 6:  Merged (I1bcdca7a95aacc3a181b9faa6b10e3a71ee24df3)
into this commit because of similarities in the idct
functions.
Patch Set 7: EC bug fix.

Change-Id: Ie31d90b5d3522e1108163f2ac491e455e3f955e6

NEON version of copyframeyonly, extendframeborders, copy_frame_func were
not working for plane stride < 128 and/or y_width < 128.

Change-Id: Id6c2e6c795274da0c90134b15c0d5f62d1b17a6c

Change-Id: Id1c189350d54919be37f864dae91dee37584945a

Change-Id: Ibbd05e981debee12c16ebcd274150cd75a94a69d