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122 Function Library
5.10 Frame Buffer
@ Name
AngeloRTV_Copy_frame (PortNo, Dest_Address, Size_Byte)
Copies the frame date to the user allocated destination memory
(bytes).
AngeloRTV_Get_frame(PortNo, Start_Address,Width, Height,
Size_Byte)
Gets the frame memory start address and size of frame (bytes).
AngeloRTV_Save_File(PortNo, FileName, FileFormat, nQuality)
Save the video frame into an image file.
@ Description
AngeloRTV_Copy_frame:
Copies frame data to memory or an array that the user has allo-
cated. Before using this function, remember to allocate enough
memory address space or array elements.
AngeloRTV_Save_File:
Saves the current video frame into an image file (TIF, BMP, or
JPEG). nQuality is only used JPEGs.
AngeloRTV_Get_frame:
Retrieves the memory start address from the frame data, width,
height, and size in bytes of the image. For example a FULL NTSC
RGB24 video frame will occupy 900K Byte (640*480*3) memory
address space.
Format DWORD(32Bit) Pixel Data
Byte 3
Bit [31:24]
Byte 2
Bit[23:16]
Byte 1
Bit[15:8]
Byte 0
Bit[7:0]
RGB32 Dw0 Appha R G B
RGB24 Dw0 B1 R0 G0 B0
Dw1 G2 B2 R1 G1
Dw2 R3 G3 B3 R2
RGB16 Dw0
{R0[31:27],
G0[26:21],
B0[20:16]}
{R0[15:11],
G0[10:5],
B0[4:0]}
Table 5-3: Pixel Data