Class for gathering statistics on the CPU. More...
Public Member Functions | |
| bool | isValid () const |
| Gets whether the statistics object is valid. More... | |
| const SharedFD & | getStatsFD () |
| Get the file descriptor for the statistics. More... | |
| const Size & | patternSize () |
| Get the pattern size. More... | |
| int | configure (const StreamConfiguration &inputCfg) |
| Configure the statistics object for the passed in input format. More... | |
| void | setWindow (const Rectangle &window) |
| Specify window coordinates over which to gather statistics. More... | |
| void | startFrame () |
| Reset state to start statistics gathering for a new frame. More... | |
| void | finishFrame (uint32_t frame, uint32_t bufferId) |
| Finish statistics calculation for the current frame. More... | |
| void | processLine0 (unsigned int y, const uint8_t *src[]) |
| Process line 0. More... | |
| void | processLine2 (unsigned int y, const uint8_t *src[]) |
| Process line 2 and 3. More... | |
Public Attributes | |
| Signal< uint32_t, uint32_t > | statsReady |
| Signals that the statistics are ready. | |
Detailed Description
Class for gathering statistics on the CPU.
CPU based software ISP statistics implementation.
This class offers a configure function + functions to gather statistics on a line by line basis. This allows CPU based software debayering to interleave debayering and statistics gathering on a line by line basis while the input data is still hot in the cache.
It is also possible to specify a window over which to gather statistics instead of processing the whole frame.
Member Function Documentation
◆ configure()
| int libcamera::SwStatsCpu::configure | ( | const StreamConfiguration & | inputCfg | ) |
Configure the statistics object for the passed in input format.
- Parameters
-
[in] inputCfg The input format
- Returns
- 0 on success, a negative errno value on failure
◆ finishFrame()
| void libcamera::SwStatsCpu::finishFrame | ( | uint32_t | frame, |
| uint32_t | bufferId | ||
| ) |
Finish statistics calculation for the current frame.
- Parameters
-
[in] frame The frame number [in] bufferId ID of the statistics buffer
This may only be called after a successful setWindow() call.
◆ getStatsFD()
|
inline |
Get the file descriptor for the statistics.
- Returns
- The file descriptor
◆ isValid()
|
inline |
Gets whether the statistics object is valid.
- Returns
- True if it's valid, false otherwise
◆ patternSize()
|
inline |
Get the pattern size.
For some input-formats, e.g. Bayer data, processing is done multiple lines and/or columns at a time. Get width and height at which the (bayer) pattern repeats. Window values are rounded down to a multiple of this and the height also indicates if processLine2() should be called or not. This may only be called after a successful configure() call.
- Returns
- The pattern size
◆ processLine0()
|
inline |
Process line 0.
- Parameters
-
[in] y The y coordinate. [in] src The input data.
This function processes line 0 for input formats with patternSize height == 1. It'll process line 0 and 1 for input formats with patternSize height >= 2. This function may only be called after a successful setWindow() call.
◆ processLine2()
|
inline |
Process line 2 and 3.
- Parameters
-
[in] y The y coordinate. [in] src The input data.
This function processes line 2 and 3 for input formats with patternSize height == 4. This function may only be called after a successful setWindow() call.
◆ setWindow()
| void libcamera::SwStatsCpu::setWindow | ( | const Rectangle & | window | ) |
Specify window coordinates over which to gather statistics.
- Parameters
-
[in] window The window object.
◆ startFrame()
| void libcamera::SwStatsCpu::startFrame | ( | void | ) |
Reset state to start statistics gathering for a new frame.
This may only be called after a successful setWindow() call.
The documentation for this class was generated from the following files:
- src/libcamera/software_isp/swstats_cpu.h
- src/libcamera/software_isp/swstats_cpu.cpp
