VP9 decoder can now use frame buffers passed in by the application.

Change-Id: I599527ec85c577f3f5552831d79a693884fafb73

This fixes issue 667.

In the case where the frame was an odd number of pixels
wide or high, the border was being extended by one col
or row too far.

The calculation of color plane dimensions was modified
to use those already computed at the time the frame
buffer was allocated.

Also freed the temporary scaling buffer in vpxdec to
prevent a memory leak.

Change-Id: I195bc81d84c0fc5d8260c1232200d62399e4b51f

This fixes issue 667.

In the case where the frame was an odd number of pixels
wide or high, the border was being extended by one col
or row too far.

The calculation of color plane dimensions was modified
to use those already computed at the time the frame
buffer was allocated.

Also freed the temporary scaling buffer in vpxdec to
prevent a memory leak.

Change-Id: Ied04bdcdfd77469731408c05da205db1a6f89bf5

Change-Id: Ib748eb287520c794631697204da6ebe19523ce95

Adopted again to shepherd through system.

Change-Id: If1b742618a95a2198ae2e30eec4b53ad1f7353e5

Change-Id: I87f1ce2ceca80d3869dd72ba862329a98eb3e0c2

- s|source -> src
- dest -> dst
- use verbose names in extend_plane dropping the redundant comments

+ light cosmetics:
- join a few lines / assignments
- drop some unnecessary comments & includes

Change-Id: I6d979a85a0223a0a79a22f79a6d9c7512fd04532

Change-Id: Idcfab16da37134f943a4314674e2e2fcbff3a0f8

Change-Id: I3814984a624bc64147c57efa74fbdda8eda47262

Becuase the routine is used by both vp8 and vp9

Change-Id: I2d35b287b5bc2394865d931a27da61f4ce7edeeb

Removed unnecessary code lines, replaced switch with an if,
fixed spelling errors and formatting.

Change-Id: Ie48aa4604aa0ed48362ca359d792fb21b2ec1dc6

Change-Id: I2bce6f381fef0729b4dd5eb09ccb609f2eddd7ef

This is a short term optimization till we work out a decoder
implementation requiring no frame border extension.

Change-Id: I02d15bfde4d926b50a4e58b393d8c4062d1be70f

This is required because upon downscaling, if a motion vector points
partially into the UMV (e.g. all minus 1 of 64+7 pixels, i.e. 70),
then we can point up to 140 pixels into the larger-resolution (2x)
reference buffer UMV, which means the UMV for reference buffers in
downscaling needs to be 140 rounded up to the nearest multiple of 32,
i.e. 160.

Longer-term, we should probably handle the UMV differently by detecting
edge coverage on-the-fly and using a temporary buffer for edge extensions
instead of adding 160 pixels on all sides of the image (which means a
CIF image uses 3x its own area size for borders).

Change-Id: I5184443e6731cd6721fc6a5d430a53e7d91b4f7e

this was never fleshed out in the context of VP8, for which it was
added. for VP9 it has no meaning.

Change-Id: Iba2ecc026d9e947067b96690245d337e51e26eff

The part where we align it by 8 or 16 is an implementation detail that
shouldn't matter to the outside world.

Change-Id: I9edd6f08b51b31c839c0ea91f767640bccb08d53

Change-Id: Ic606ef1b31e49963a779455a1e010a9ebb0f3f1f

This is a mostly-working implementation of an extra channel in the
bitstream. Configure with --enable-alpha to test. Notable TODOs:

 - Add extra channel to all mismatch tests, PSNR, SSIM, etc
 - Configurable subsampling
 - Variable number of planes (currently always uses all 4)
 - Loop filtering
 - Per-plane lossless quantizer
 - ARNR support

This implementation just uses the same contents as the Y channel
for the A channel, due to lack of content and general pain in
playing back 4 channel content. A later patch will use the actual
alpha channel passed in from outside the codec.

Change-Id: Ibf81f023b1c570bd84b3064e9b4b8ae52e087592

Adds a subsampling aware border extension function. This may be reworked
soon to support more than 3 planes.

Change-Id: I76b81901ad10bb1e678dd4f0d22740ca6c76c43b

Change-Id: I8b2687138df636b2b78c8cc5156e3882b0009de0

Make framebuffer allocations according to the chroma subsamping
factors in use. A bit is placed in the raw part of the frame header for
each of the two subsampling factors. This will be moved in a future
commit to make them part of the TBD feature set bits, probably only set
on keyframes, etc.

Change-Id: I59ed38d3a3c0d4af3c7c277617de28d04a001853

Ensures that the full 64 pixel border is available for prediction (need a minimum of
64+INTERP_EXTEND on all sides, and 32+INTERP_EXTEND on UV). Value also must be a
multiple of 32 to keep UV stride alignment. The smaller border was causing the prediction
to read outside the frame, which can cause a mismatch.

TODO: Get rid of this explicit border and use edge emulation instead.

Change-Id: I3f68453a088ec0ab4349d0f5cc02b573be06d7c4

Update to use the new YV12_BUFFER_CONFIG structure.

Change-Id: Ia64757d50cc9019d336fa622e059bf68140d0fa7

Updates the YV12_BUFFER_CONFIG structure to be crop-aware. The
exiting width/height parameters are left unchanged, storing the
width and height algined to a 16 byte boundary. The cropped
dimensions are added as new fields.

This fixes a nasty visual pulse when switching between scaled and
unscaled frame dimensions due to a mismatch between the scaling
ratio and the 16-byte aligned sizes.

Change-Id: Id4a3f6aea6b9b9ae38bdfa1b87b7eb2cfcdd57b6

As long as the new frame is smaller than the size that was originally
allocated, we don't need to free and reallocate the memory allocated.
Instead, do the allocation on the size of the first frame. We could
make this passed in from the application instead, if we wanted to
support external upscaling.

Change-Id: I204d17a130728bbd91155bb4bd863a99bb99b038

Various fixups to resolve issues when building vp9-preview under the more stringent
checks placed on the experimental branch.

Change-Id: I21749de83552e1e75c799003f849e6a0f1a35b07

For coefficients, use int16_t (instead of short); for pixel values in
16-bit intermediates, use uint16_t (instead of unsigned short); for all
others, use uint8_t (instead of unsigned char).

Change-Id: I3619cd9abf106c3742eccc2e2f5e89a62774f7da

Change-Id: I92d613e89c8f1174eca0789116120bfa20c25c28

Change-Id: I5fbcd2006d05bfe841f3c7af9c1aeb2cb83b3149

Change-Id: I178352813d2b8702d081caf405de9dbad9af2cc3

Only declare the functions in vpx_scale RTCD and include the relevant
header.

Remove unused files and functions in vpx_scale to avoid wasting time
renaming. vpx_scale/win32/scaleopt.c contains functions which have not
been called in a long time but are potentially optimized.

The 'vp8' functions have not been renamed yet. That is for after the
cleanup.

Change-Id: I2c325a101d60fa9d27e7dfcd5b52a864b4a1e09c

Refactor asm_offsets for vpx_scale.

Change-Id: I2db0eeb28c8e757bd033c6614a1e5319a1a204a5

Only declare the functions in vpx_scale RTCD and include the relevant
header.

Remove unused files and functions in vpx_scale to avoid wasting time
renaming. vpx_scale/win32/scaleopt.c contains functions which have not
been called in a long time but are potentially optimized.

The 'vp8' functions have not been renamed yet. That is for after the
cleanup.

Change-Id: I2c325a101d60fa9d27e7dfcd5b52a864b4a1e09c

Refactor asm_offsets for vpx_scale.

Change-Id: I2db0eeb28c8e757bd033c6614a1e5319a1a204a5

Change-Id: I4765ca3dab880a3673c15fb56b2d912ec2ea194e

Change-Id: Ib8f8a66c9fd31e508cdc9caa662192f38433aa3d

yv12extend_generic.h target not found.

Change-Id: I8b5c9280c92573e5c1917ba4e18a99a6ce7dcb65

Import changes made on the experimental branch in preparation for
merging the two branches.

Change-Id: I7b5b8fb4fca155cb1d72e7ba13eef18e6a94a298

Update vpx_scale from current code in master, run style transform, fix
lint warnings.

Change-Id: I47eadeb5b6881d448ea3728537f9b8a5b5aac78e

Merged the enhanced_interp experiment.
Found and fixed a bug in the include files framework, whereby
certain encoder files were still using the old INTERP_EXTEND
value of 3 instead of 4. The thresholds for mv range mcomp.c
need a small adjustment to prevent crashes.

The results are more or less unchanged.

Change-Id: Iac5008390f1efc97ce1102fbb5f8989c847fb579