Frame buffers are now allocated dynamically on-demand.

Entries in the reference frame map, cm->ref_frame_map,
may now be set to -1 (INVALID_IDX) to indicate that
there is not a valid reference buffer in that "slot".

All slots in the reference frame map are now initialized
to the empty state (-1) and each buffer is initialized
to have a reference count of 0.

Change-Id: Id1afe98de98db4ae8b2dfefed7889c3b28c68582

The rounding factor needs to be scaled down by a factor of 2.
Also, the quantized and dequantized coefficients are memset to 0
when dc quantizer is used.

Change-Id: Ifa68bab02addbf1b83d249c5b4cbd5cda796b1cf

Change-Id: I0a26994bf65ea224e496b09af2ce71e1a4210433

Instead using only a fixed threshold, this commit adapts the threshold
for color sensitivity decision to luma signal energy: chroma channel's
sse is at least 1/6 of that in luma for color sensitivity flag to be
set to active.

This recoups a large portion of the speed loss due to accounting for
chroma component costs in RTC mode decision.

Change-Id: Ie01f747f6037dba6a1d1ed3e10b71a0ef1abc42c

This patch fixed webm issue 962.
(https://code.google.com/p/webm/issues/detail?id=962)
The data races occurred when an encoder and a decoder were created
at the same time, and the function pointers were initialized twice.

Change-Id: I8851b753c4b4ad4767d6eea781b61f0ac9abb44b

without VPX_CODEC_USE_PSNR they're only generated by default with
--enable-internal-stats

Change-Id: I9a5a8874a3aa4bde39ae09a4101ed5616c83c9a1

MIPS build fixes

https://code.google.com/p/webm/issues/detail?id=957

Change-Id: I9d53900af36d783c369b5dff27a7479cb94fd16b

This commit replaces the SAD with variance as metric for the
integral projection vector match. It improves the search accuracy
in the presence of slight light change. The average speed -6
compression performance for rtc set is improved by 1.7%. No speed
changes are observed for the test clips.

Change-Id: I71c1d27e42de2aa429fb3564e6549bba1c7d6d4d

This commit fixes an issue in source frame border extension. It
causes certain frame resolution such as 640x480 to have a portion
of the right/bottom extension filled by zeros, which misleads
motion search and degrades transform coding performance when large
block size is used.

This fix improves the speed 2 compression performance of a few
yt sequence, typically ranging from 1% - 2%, up to 5% at median
to low bit-rate.

Change-Id: Id6b09a5695d9e7651c6dfbc2c6a72288b08af7fb

Should use the crop dimensions of the frame rather
than the extended size.

Change-Id: I49ed041a46ff0753d43e074020857b7ff2f95e17

both the encode and decode perf tests require niklas_1280_720_30.yuv
broken since:
28eebf3e Merge "tests: add a shorter 720p test clip"
7839d038 tests: add a shorter 720p test clip

Change-Id: I51ebbf7261832e25d8f2c1da5c7df5c2e47f748e

Change-Id: I387da141ebade4fc4d2f3c0a2b6aa5aaea091c0c

a bit simpler than invoking awk for rand()

Change-Id: I36ac474708f7bf0157ae59b882c2a9f69b0aaf41

Change-Id: Ib85b5bc135aa0907a76b8c74faafe577e27d014f

Change-Id: Idb14b9a285f8098126f967c5e2750221d6a58f69

Support variable block size integral projection based motion
estimation.

Change-Id: Iee6d65e44df4480aa13fb7b84b9c91914b89caa1

+ add a helper function to reduce the duplication

this is a bit clearer when the environment variable is set, but the
directory is missing

Change-Id: I08f9b56122b5741bb40a5f795f7f82f5b49f1047

Change-Id: I6728b69bb3dff1daa64ff7142f691e80a089f1c4

Change-Id: Iefb928ad1174e274409facfb44f80265ff0f7683

Change-Id: Ibd87db1c4371edcbe193d39df2fdc07d3842c21a