commit eb939f45b8ffde47e160d545114d68ddd3606b90
author John Koleszar <jkoleszar@google.com> Sun Feb 24 20:55:14 2013 -0800
committer John Koleszar <jkoleszar@google.com> Tue Feb 26 23:54:23 2013 -0800
tree bfbd390adf5895b76d63fb7813b91fa77694f1c1
parent c7805395fd4aab2abadce9d34aaf07853cfc5e6d

Spatial resamping of ZEROMV predictors

This patch allows coding frames using references of different
resolution, in ZEROMV mode. For compound prediction, either
reference may be scaled.

To test, I use the resize_test and enable WRITE_RECON_BUFFER
in vp9_onyxd_if.c. It's also useful to apply this patch to
test/i420_video_source.h:

  --- a/test/i420_video_source.h
  +++ b/test/i420_video_source.h
  @@ -93,6 +93,7 @@ class I420VideoSource : public VideoSource {

     virtual void FillFrame() {
       // Read a frame from input_file.
  +    if (frame_ != 3)
       if (fread(img_->img_data, raw_sz_, 1, input_file_) == 0) {
         limit_ = frame_;
       }

This forces the frame that the resolution changes on to be coded
with no motion, only scaling, and improves the quality of the
result.

Change-Id: I1ee75d19a437ff801192f767fd02a36bcbd1d496