PRELIMINARY
CAMERA INTERFACE
S3C6400X RISC MICROPROCESSOR
20-28
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
If ( SRC_Width >= 64 × DST_Width ) { Exit(-1); /* Out Of Horizontal Scale Range */ }
else if (SRC_Width >= 32 × DST_Width) { PreHorRatio_xx = 32; H_Shift = 5; }
else if (SRC_Width >= 16 × DST_Width) { PreHorRatio_xx = 16; H_Shift = 4; }
else if (SRC_Width >= 8 × DST_Width) { PreHorRatio_xx = 8; H_Shift = 3; }
else if (SRC_Width >= 4 × DST_Width) { PreHorRatio_xx = 4; H_Shift = 2; }
else if (SRC_Width >= 2 × DST_Width) { PreHorRatio_xx = 2; H_Shift = 1; }
else { PreHorRatio_xx = 1; H_Shift = 0; }
PreDstWidth_xx = SRC_Width / PreHorRatio_xx;
MainHorRatio_xx = ( SRC_Width << 8 ) / ( DST_Width << H_Shift);
If ( SRC_Height >= 64 × DST_Height ) { Exit(-1); /* Out Of Vertical Scale Range */ }
else if (SRC_Height >= 32 × DST_Height) { PreVerRatio_xx = 32; V_Shift = 5; }
else if (SRC_Height >= 16 × DST_Height) { PreVerRatio_xx = 16; V_Shift = 4; }
else if (SRC_Height >= 8 × DST_Height) { PreVerRatio_xx = 8; V_Shift = 3; }
else if (SRC_Height >= 4 × DST_Height) { PreVerRatio_xx = 4; V_Shift = 2; }
else if (SRC_Height >= 2 × DST_Height) { PreVerRatio_xx = 2; V_Shift = 1; }
else { PreVerRatio_xx = 1; V_Shift = 0; }
PreDstHeight_xx = SRC_Height / PreVerRatio_xx;
MainVerRatio_xx = ( SRC_Height << 8 ) / ( DST_Height << V_Shift);
SHfactor_xx = 10 – ( V_Shift);
C
aution! In preview path, Pre-scaled H_width must be the less than 640. (The maximum size of preview
path scaler’s line buffer is 640.)
Æ
refer to the table 1-1.
C
aution! In Zoom-In case, you must check the next equation.
((SourceHsize - (WinH WinHorOfst2)) / PreHorRatio_Pr) <= 640 (preview scaler max. hsize)
CODEC PRE-SCALER CONTROL REGISTER 1
Register
Address
R/W
Description
Reset Value
CICOSCPRERATIO 0x78000050
RW
Codec pre-scaler ratio control
0
CICOSCPRERATIO
Bit
Description
Initial
State
M L
SHfactor_Co
[31:28] Shift factor for codec pre-scaler
0
O O