The Input Port defines how the engine reads the data from the buffer.
To add an input port to an engine, find the Port IN element in the ISP Palette, select the element, and attach it to the engine.
The Input Port has the following properties depending on the engine type:
| IPUS, IPUV | H264Enc |
|---|---|
 |
 |
- Data Type [Bits per Pixel] - Type of the data that the input port reads from the buffer. Set the same Data Type value for the engine port and the source buffer.
- Port Type - The port type:
- A, B and Alpha for the IPUS engines with the 4 and 5 indexes
- A for the IPUS engines with the 0-3, 6 and 7 indexes
- A and B for the IPUV engines
- Index - Index of the input port in the ports array. The Index value must be
unique among other input ports of the engine.
The H264Enc input port indexes indicate the luma (Y) and chroma (U, V) components of color space.
- Line Increment - A value to be added to the DDR/SRAM line number of the current transfer. Set this property if you want to override the line increment of the buffer. If you do not want to override it, leave it 0.
- Number of required lines to start processing - Number of required lines to start processing.
- Number of Read Pixels [Pixels] - Number of pixels read from a line.
- Line Offset - The line offset.
- Pixel Offset [Pixels] - Number of pixels to skip at the beginning of each line. This option allows you to read unaligned data.
- Skipped Lines Quantity - Number of skipped lines.