fixes a crash in assembly on 32-bit linux/windows

Change-Id: I0c27e6c0ece9732b5eb2ee5b59ff42c3c8016c50

tiles are decoded in parallel within a single frame

Change-Id: I7aca87cb1c239b74eceef72bdc9f672faebac373

factorizes the code in decode_tiles(). reading the offsets backwards
wasn't doing anything to prove tile independence

Change-Id: I0395d3c77205852ebdc55efedc68291e93cef85c

Change-Id: I56f8c50ac382202f66040cd9cfaa05d889572fc7

Change-Id: Idc03f3fca4bf2d0afd33631ea1d3caf8fc34ec29

Warning was: "implicit conversion from enumeration type 'VPX_SCALING_MODE'
(aka 'enum vpx_scaling_mode_1d') to different enumeration type
'VPX_SCALING'".

Change-Id: I45689e439a8775bc1e7534d0ea1ff7c729f2c7f5

Fix warning with -Wstrict-aliasing=1

Change-Id: Idfac09be1ab328923883e63436577f1018c895b8

Fix warning with -Wstrict-aliasing=1

Change-Id: Ic37013e6477cf213925830d0bd8e6f17364ff7cc

Fix warning with -Wstrict-aliasing=1

Change-Id: Ic4e511af924247800e87d5f990636565f3dd91d2

Fix warning with -Wstrict-aliasing=1

Change-Id: I43df2781656dd7b3f4c0ec6daa283d7a78928a0c

Fix warning with -Wstrict-aliasing=1

Change-Id: Ibf4af991f2c82b8ccbdc20362da64be669564333

Wrong value was used in get_tx_type_4x4() function, so making
initialization before that call.

Change-Id: Ief30bb1e0c03b2f23d993bbf9ae18d7150ba9a83

"keyframe" variable in the current code actually means that previous
frame is a keyframe because cm->frame_type has not been initialized
in read_uncompressed_header.

Change-Id: I5645b0816c70abdef5dfc70113018d06276dac77

The clamp operation may not affect the values of the final assigned mv
where compiler may make use of strict aliasing rule to optimize out the
clamp operation. This change made the code segments to better comply
the strict aliasing rule.

Change-Id: I24502ff18bd4f9e62507a879cc8760a91a0fd07e

Added comments to make the codebase build cleanly in Doxygen.

Change-Id: I01e000ceac57dbafa04342858c8f1be250ba20d1

group error checking at the top followed by allocations, setup then
decode.

Change-Id: I877d21326bb767885520511ecea70e5fd1e28054

Change-Id: I5b17f40e515c4bcf9ebef5380270a214af4e0115

When building with new versions of Clang we encounter some issues. Work
around them by adding -fno-strict-aliasing when we detect Clang.

https://code.google.com/p/webm/issues/detail?id=603

Change-Id: I8e945a18a7215bcc627e7a1ee110078413259cc7

Making partition read/write logic more clear.

Change-Id: I1981e90327257d37095567c62d72a103cda1da33

Passing scan & iscan as parameters, adding useful local variables.

Change-Id: Ia2a87906941db9557350d273669ce5c3cdb7235d

replaces use of cur_tile_mi_(row|col)_(start|end) by VP9_COMMON, making
it less stateful and more reusable for parallel tile decoding

Change-Id: I1df09382b4567a0e5f4434825d47c79afe2399be