Samsung S5PC110 Manual page 1556

S5PC110_UM
8.4.1.21 Video Processor Horizontal Zoom Ratio (VP_H_RATIO, R/W, Address = 0xF910_0064)
VP_H_RATIO
Reserved
VP_H_RATIO
8.4.1.22 Video Processor Vertical Zoom Ratio (VP_V_RATIO, R/W, Address = 0xF910_0068)
VP_V_RATIO
Reserved
VP_V_RATIO
Bit
[31:19] Reserved, read as zero, do not modify
[18:0] Horizontal zoom ratio of SRC:DST
- 3.16 format
Note: (3.16) format means that
- '3' is an integer.
- '16' is a fraction.
Example) SRC : DST = 1 : 2
Because of 16-bit fraction, it is had to do 16 time
left shift operation. As a result, register value is
1/2 * 2^16 = 0x8000
Bit
[31:19] Reserved, read as zero, do not modify
[18:0] Vertical zoom ratio of SRC:DST
- 3.16 format
This register should be as follows.
(1) BOB mode, IPC disable
VP_V_RATIO = SRC / DST
(2) BOB mode, IPC enable
VP_V_RATIO = 2 * SRC / DST
(This is because destination line number is
doubled by de-interlacing process itself)
Note: (3.16) format means that
- '3' is an integer.
- '16' is a fraction.
Example) SRC: DST = 1 : 2
Due to 16-bit fraction, it had to do 16 time left shift
operation. As a result, register value is 1/2 * 2^16
= 0x8000
Description
Description
8 7BVIDEO PROCESSOR
Initial State
0
0
Initial State
0
0
8-22