ref: eb93893bee166e183a6c3391850a05a0a030731d
parent: f66320abff79ee376ca9ad9282d12509f6e38e50
author: Dmitry Kovalev <dkovalev@google.com>
date: Thu May 9 07:37:51 EDT 2013
Updating comments for prediction modes. Change-Id: If4063184f7b37dc011ec6a7a3e75260f4251e984
--- a/vp9/common/vp9_blockd.h
+++ b/vp9/common/vp9_blockd.h
@@ -70,17 +70,17 @@
} INTERPOLATIONFILTERTYPE;
typedef enum {- DC_PRED, /* average of above and left pixels */
- V_PRED, /* vertical prediction */
- H_PRED, /* horizontal prediction */
- D45_PRED, /* Directional 45 deg prediction [anti-clockwise from 0 deg hor] */
- D135_PRED, /* Directional 135 deg prediction [anti-clockwise from 0 deg hor] */
- D117_PRED, /* Directional 112 deg prediction [anti-clockwise from 0 deg hor] */
- D153_PRED, /* Directional 157 deg prediction [anti-clockwise from 0 deg hor] */
- D27_PRED, /* Directional 22 deg prediction [anti-clockwise from 0 deg hor] */
- D63_PRED, /* Directional 67 deg prediction [anti-clockwise from 0 deg hor] */
- TM_PRED, /* Truemotion prediction */
- I4X4_PRED, /* 4x4 based prediction, each 4x4 has its own mode */
+ DC_PRED, // Average of above and left pixels
+ V_PRED, // Vertical
+ H_PRED, // Horizontal
+ D45_PRED, // Directional 45 deg = round(arctan(1/1) * 180/pi)
+ D135_PRED, // Directional 135 deg = 180 - 45
+ D117_PRED, // Directional 117 deg = 180 - 63
+ D153_PRED, // Directional 153 deg = 180 - 27
+ D27_PRED, // Directional 27 deg = round(arctan(1/2) * 180/pi)
+ D63_PRED, // Directional 63 deg = round(arctan(2/1) * 180/pi)
+ TM_PRED, // True-motion
+ I4X4_PRED, // Each 4x4 subblock has its own mode
NEARESTMV,
NEARMV,
ZEROMV,