ref: dd69337e6ea436a091d7441b70c92ae2254920e6
parent: cc1e05ca5f6b1be0ab22e18f18532bc4fc98caba
author: Yaowu Xu <yaowu@google.com>
date: Mon Nov 25 04:58:25 EST 2013
Amended some comments for clarity Change-Id: I31c3908ba394095deb5d3a5d7b7c9b2b5328c3e8
--- a/vp9/common/vp9_enums.h
+++ b/vp9/common/vp9_enums.h
@@ -52,20 +52,22 @@
#define PARTITION_PLOFFSET 4 // number of probability models per block size
#define PARTITION_CONTEXTS (4 * PARTITION_PLOFFSET)
+// block transform size
typedef enum {- TX_4X4 = 0, // 4x4 dct transform
- TX_8X8 = 1, // 8x8 dct transform
- TX_16X16 = 2, // 16x16 dct transform
- TX_32X32 = 3, // 32x32 dct transform
+ TX_4X4 = 0, // 4x4 transform
+ TX_8X8 = 1, // 8x8 transform
+ TX_16X16 = 2, // 16x16 transform
+ TX_32X32 = 3, // 32x32 transform
TX_SIZES
} TX_SIZE;
+// frame transform mode
typedef enum {- ONLY_4X4 = 0,
- ALLOW_8X8 = 1,
- ALLOW_16X16 = 2,
- ALLOW_32X32 = 3,
- TX_MODE_SELECT = 4,
+ ONLY_4X4 = 0, // only 4x4 transform used
+ ALLOW_8X8 = 1, // allow block transform size up to 8x8
+ ALLOW_16X16 = 2, // allow block transform size up to 16x16
+ ALLOW_32X32 = 3, // allow block transform size up to 32x32
+ TX_MODE_SELECT = 4, // transform specified for each block
TX_MODES = 5,
} TX_MODE;
--
⑨