The 32x32 forward transform can potentially reach peak coefficient
value close to 32700, while the rounding factor can go upto 610.
This could cause overflow issue in the SSSE3 implementation of 32x32
quantization process.

This commit resolves this issue by replacing the addition operations
with saturated addition operations in 32x32 block quantization.

Change-Id: Id6b98996458e16c5b6241338ca113c332bef6e70

The 32x32 quantization process can potentially have the intermediate
stacks over 16-bit range, thereby causing enc/dec mismatch. This commit
fixes this overflow issue in the SSSE3 implementation, as well as the
prototype, of 32x32 quantization.

This fixes issue 607 from webm@googlecode.

Change-Id: I85635e6ca236b90c3dcfc40d449215c7b9caa806

If none of the 16 coefficients that we quantize per loop iteration
are larger than the zbin, directly skip to the next round of coeffs,
rather than doing a full quantize loop that will eventually result
in 16 zeroes. This incurs a jump cost, but saves a lot of other work.
32x32 quant goes from 1349 -> 1184 cycles. The same approach yielded
no significantly positive results for smaller transforms, so is not
used there (8x8: 103 -> 101 cycles; 16x16: 302 -> 306 cycles).

Change-Id: I8fca17dc2543fc8eed1dbcd5100145e3c3a9b647

Encode time of bus (speed 0) 50 frames @ 1500kbps goes from 2min14.4 to
2min10.1, i.e. a 2.3% overall speed increase.

Change-Id: I3699580e74ec26c7d24e03681bc47ba25ee1ee87

Total encoding time for first 50 frames of bus (speed 0) @ 1500kbps
goes 2min34.8 to 2min14.4, i.e. a 10.4% overall speedup. The code is
x86-64 only, it needs some minor modifications to be 32bit compatible,
because it uses 15 xmm registers, whereas 32bit only has 8.

Change-Id: I2df53770c2e850813ffa713e1a91b45b0082b904

Files were copied from vp8 and never maintained.

Change-Id: I9659a8755985da73e8c19c3c984423b6666d8871

This data can vary per-plane, but not per-block.

Change-Id: I1971b0b2c2e697d2118e38b54ef446e52f63c65a

Some projects must define only win64 for Windows 64bit builds using
yasm.

Change-Id: I1d09590d66a7bfc8b4412e1cc8685978ac60b748

Change-Id: I6e43ca73f35401a974ed8ee27738d4318f09fd37

Support for gyp which doesn't support multiple objects in the same
static library having the same basename.

Change-Id: Ib947eefbaf68f8b177a796d23f875ccdfa6bc9dc

Change-Id: Ic084c475844b24092a433ab88138cf58af3abbe4

For local symbols, make them static instead.

Change-Id: I13d60947a46f711bc8991e16100cea2a13e3a22e

Change-Id: Ie2e3652591b010ded10c216501ce24fd95d0aec5

Add PRIVATE macro for adding private_extern directive for yasm
to hide global symbols. This is only enabled if -DCHROMIUM is used
with YASM.

Also fixed a small problem with	rtcd_defs.sh to guard TEMPORAL_DENOISING.

Change-Id: I9027fce3ebddcf20078293e4b86b396f21da7857

Add PRIVATE macro for adding private_extern directive for yasm
to hide global symbols. This is only enabled if -DCHROMIUM is used
with YASM.

Also fixed a small problem with	rtcd_defs.sh to guard TEMPORAL_DENOISING.

Change-Id: I9027fce3ebddcf20078293e4b86b396f21da7857

Simplified the EOB calculation in the function.

Change-Id: I7422f18be40ae270358f5cb0811d66e64436b56f

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

on the same order as the sse2 fast quantize change: ~2%
except for 32bit. only a slight improvment there.

Change-Id: Iff80e5f1ce7e646eebfdc8871405458ff911986b

about ~5% gain on 32bit. disabled for 64bit

unset executable bit on ssse3 version (cosmetic)

Change-Id: I1a5860839eb294ce4261f819caea2dcfa78e57ca

(test clip: tulip)
For good quality mode with speed=1, this gave the encoder
a small (2 - 3%) performance boost.

Change-Id: I8a1d4269465944ac0819986c2f0be4b0a2ee0b35