ref: e326cecf18a01172074bf9b3a9524c5887a122e7
parent: ba8fc719792616e253ba2a1c62504a64bb5acb7a
author: Tero Rintaluoma <teror@google.com>
date: Thu Aug 22 07:29:19 EDT 2013
Fix intermediate height in convolve_c
- Intermediate height was not correct i.e. when block size is 4 and
y_step_q4 is 6. In this case intermediate height was
(4*6) >> 4 = 1 and vertical interpolation needs two source pixels
plus 7 extra pixels for taps.
- Also if the current output block is 16x16 and we are using 4x upscaling
we need only 12 rows after horizontal filtering instead of 16.
Patch Set 2: Intermediate_height updated after CL 66723
"Fix bug in convolution functions (filter selection)"
Change-Id: I5a1a1bc2ac9d5edb3a6e0818de618bf318fdd589