Video input (VI) module implements the function: the Rx MIPI (including MIPI interface, LVDS interface, and interfaces HISPI), SLVS-EC, BT.1120, BT.656, BT.601, DC interface to receive video data and the like. VI received data into the specified memory area, in this process, the original video VI may interface processes the received image data, video data collection implement.
1. module division
The input device (DEV)
Input PIPE (PIPE illustrated as physical, virtual PIPE contains only ISP_BE)
Physical Channel (PHY_CHN)
Extended Channel (EXT_CHN)
2. Module function
2.1 video input device
VI All devices are independent of each other, support timing resolution.
2.2 Video Input PIPE
The PIPE VI contains the relevant processing function ISP, mainly pipeline processing on the image data, YUV image format to the output channel.
2.3 Physical channel video
A PIPE Hi3519AV100 VI contains two physical channels, CH0 having cutting, compression and other functions, with a reduced functionality CHl, supports eight expansion channels.
Typical resolution of physical channels supported Hi3519AV100 as 3840x2160 @ 60fps, 3840x2160 @ 30fps, 1080p @ 240fps, 1080p @ 120fps, 1080p @ 60fps, 1080p @ 30fps like.
2.4 Extended video channel
Extended channel is an extension of the physical channel, extended channel includes a zoom, crop, fish-eye correction function, it is bound by the physical channel, the physical channel output as its input, and outputs the target image set by the user.
2.5 MIPI and binding relationship of DEV
Hi3519AV100 / Hi3519AV100 / Hi3516DV300 / Hi3516CV500 / Hi3559V200 / Hi3556V200 / Hi3516EV200 of Dev and MIPI binding relationship is fixed and can not dynamically modify the binding relationship.
DEV and distal interfaces are input timing constraints. E.g. Hi3559AV100 BT.1120 requires access to the front end, and the selected group 0 BT.1120 pins, PIPE DEV5 should bind to receive data properly.
2.6 DEV and binding relationship of PIPE
- Each PIPE can bind with any Dev, but can not modify dynamic binding relationship.
- Linear mode (non WDR mode) of a passage should be a physical binding Dev PIPE, it requires a plurality of physical binding PIPE Dev the WDR mode, for example, 2-1WDR, we need two physically bound to a PIPE Dev. WDR mode and in only bind to Article 1 Dev physical channel data output PIPE, PIPE other physical channels there is no binding of the image data output.
3. API function
Video input (VI) to achieve enabled video input devices, video input PIPE creation, video input channel configuration, Dev MIPI binding equipment, binding PIPE Dev and other functions.