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The ALT_REF_FRAME is now updated in the case of a KEY_FRAME in the VP9 denoiser.

Change-Id: Idf9a9772706f50e774fb240afcc01db38841043c

In vp8, statistics are collected about the different modes as they are searched.
This process is more complicated due to the variable block size. Fields were
added to the PICM_MODE_CONTEXT struct to hold this information for each point in
the search. The information is then taken from the appropriate part of the tree
during denoising.

Change-Id: I89261ab77ad637821287ae157dfdf694702b8e77

In the previous version, only certain buffers in the macroblockd were saved and
the restored. In this version, all of the buffers are saved and restored. The
code was then rolled into a loop for readability.

Also contains a tiny fix for when the -DOUTPUT_YUV_DENOISED flag is used.

Change-Id: Id925ef8b3fa122ae88acfa1d9a1e4df45df83518

Renamed updating_running_avg() to filter(). Extended function with the rest of
the filter procedure. Made all of the empirically-determined constants used in
VP8 into functions so they can be tweaked more easily.

Change-Id: I41730c8c92370c76885950a43742347477ca4e7e

As in VP8.

Currently, this parameter is set with the VP8E_SET_NOISE_SENSITIVITY flag.
The flag was not renamed so that we don't break the interface for webrtc. This
should probably be changed at some point in the future.

Change-Id: Ic73fcb0dde9d1d019e9d042050b617333ac65472

Change-Id: Icbe05657f0e92c3838e6a5a975f4f82d21328a2e

Change-Id: Id52a7869fd1f31bb060de170e3295da7435adb9e

Grayscale is conditionally compiled.

Change-Id: I482ab237560d0bae8d397fd9999e78d38104f2a1

Change-Id: Iee21eb0ecc5a1fe2c56fb3df0cee0ead6d139ed1

Also added reset_frame_stats()

Change-Id: I8e6ca00dbd5fa85cd39485d81c9343c0ff207d6c

Now copies the src to the correct location in the running average buffer.

Change-Id: I9c83c96dc7a97f42c8df16ab4a9f18b733181f34

s/stdint.h/vpx\/vpx_int.h

Added missing 'break;'s

Also included other minor changes, mostly cosmetic.

Change-Id: I852bba3e85e794f1d4af854c45c16a23a787e6a3

Change-Id: I1216f17e2206ef521fe219b6d72d8e41d1ba1147

Change-Id: Ie0aa41fb7957755544321897b3bb2dd92f392027

Change-Id: Ie89ad1e3aebbd474e1a0db69c1961b4d1ddcd33e

Changed alloc, free, and running average code as necessary.

Change-Id: Ifc4d9ccca462164214019963b3768a457791b9c1

Change-Id: I9577d648542064052795bf5770428fbd5c276b7b

Change-Id: I79eba79f7c52eec19ef2356278597e06620d5e27

Change-Id: Iccf6ede4c4f85646b0f8daec47050ce93e267c90