Fix of https://code.google.com/p/webm/issues/detail?id=698 issue.

Change-Id: I7a92d91481dbbae28d8953f146e9faafdcd7a310

Corresponding renames:
  subpel_kernel              => interp_kernel
  vp9_get_filter_kernel()    => vp9_get_interp_kernel()
  pred_filter_type           => pred_interp_filter
  adaptive_pred_filter_type  => adaptive_pred_interp_filter
  mcomp_filter_type          => interp_filter
  read_interp_filter_type()  => read_interp_filter()
  write_interp_filter_type() => write_interp_filter()
  fix_mcomp_filter_type()    => fix_interp_filter()

Change-Id: I1fa61fa1dc81ebbf043457c3ee2d8d4515bee6d3

Also change its wrongly named dest parameter to reference.

Change-Id: Ide142dead31c9ccda1f09a48b221284369783fb7

Change-Id: I24ff8ab3d2c807906aa86974bcb4c540256206de

SSE for a 64x64 block with 3 planes can go as high as 3*2^28. So left
shift by 4 may overflow 32 bit int.

Change-Id: I63c84aa56894788bb987299badabbd7cc6fd0be6

Use this method with rt at speed -5.

Change-Id: If3bd6fad4c05ddde72131442dad191e4145047e7

The sum of squared mv components can go beyond int range for large
 input resolution. This commit changed the type to int64 to avoid
overflow.

Change-Id: Ib21ea2817845cea1435f893064e6417c79c5bc64

New API is supposed to be used from example code. Current implementation
only supports IVF containers (will be extended to Y4M).

Change-Id: Ib7da87237690b1a28297bdf03bc41c6836a84b7e

Change-Id: I8cfa5d5eb2c1bbacd9b604cc5dc0a2cd2e5cebb8

Change-Id: I5173f996612e410d9cd495df9414d194b1ab18f3

Change-Id: Ia12aae491202098ff66366145aa0c3da38dc97e5

Merge changes I826655a7,I5164df72,Iba9b198c,Ide9a6846,I4f51ce85,I0e6aa00f,Ic334da9a,I252f5f8a,I7865db2d,I13b434b1

* changes:
  test/: remove unnecessary extern "C"s
  top-level: add extern "C" to headers
  vpx_ports: add extern "C" to headers
  vpx: add extern "C" to headers
  vp9/encoder: add extern "C" to headers
  vp9/decoder: add extern "C" to headers
  vp9/common: add extern "C" to headers
  vp8/encoder: add extern "C" to headers
  vp8/decoder: add extern "C" to headers
  vp8/common: add extern "C" to headers

which is 3.5 times faster than C.

Change-Id: I24439ba7a2971829c11620f34848facf2c916678

A future CL will add external frame buffers
differently.

Squash commit of four revert commits:
Revert "Increase required number of external frame buffers"

This reverts commit 9e41d569.

Revert "Add external constants."

This reverts commit bbf53047.

Revert "Add frame buffer lru cache."

This reverts commit fbada948.

Conflicts:
	vpxdec.c

Change-Id: I76fe42419923a6ea6c75d9997cbbf941d73d3005

Revert "Add support to pass in external frame buffers."

This reverts commit 10f89169.

Conflicts:
	test/external_frame_buffer_test.cc
	vp9/common/vp9_alloccommon.c
	vp9/common/vp9_reconinter.c
	vp9/decoder/vp9_decodeframe.c
	vp9/encoder/vp9_onyx_if.c
	vp9/vp9_dx_iface.c
	vpx/vpx_decoder.h
	vpx/vpx_external_frame_buffer.h
	vpx_scale/generic/yv12config.c
	vpxdec.c

Change-Id: I7434cf590f1c852b38569980e4247fad0d939c2e

* changes:
  Reorder functions to avoid forward declaration
  Rename set_scale_factors as set_ref_ptrs

Change-Id: I826655a708010149de231ca31a2e3ba4f1842c0c

Change-Id: I5164df72aff84eca0ace56032c5373f04053c6a5

Change-Id: Iba9b198ce78b3f8b644feba064f83abc247e75dd

Change-Id: I5e546fce725b8c4722da5494e9423154e870fd58

Change-Id: Ide9a68466ed30453872465a6c2f9c414690df876

Change-Id: I4f51ce859a97bf1b8fd2b37ac585b7c643232b69

Change-Id: I0e6aa00f220280e22d30d098545265835d0c1079

Change-Id: Ic334da9aee968e33762c2b25d9fbad24c844b411