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Spatial resamping of ZEROMV predictors

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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
This commit is contained in:
John Koleszar
2013-02-24 20:55:14 -08:00
parent c7805395fd
commit eb939f45b8
22 changed files with 741 additions and 232 deletions
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2
vp9/encoder/vp9_firstpass.c
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@@ -613,7 +613,7 @@ void vp9_first_pass(VP9_COMP *cpi) {
this_error = motion_error;
vp9_set_mbmode_and_mvs(x, NEWMV, &mv);
xd->mode_info_context->mbmi.txfm_size = TX_4X4;
vp9_encode_inter16x16y(x);
vp9_encode_inter16x16y(x, mb_row, mb_col);
sum_mvr += mv.as_mv.row;
sum_mvr_abs += abs(mv.as_mv.row);
sum_mvc += mv.as_mv.col;