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2021-11-29ipa: libipa: Introduce Algorithm class templateJean-Michel Hautbois
The algorithms are using the same function names with specialized parameters. Instead of duplicating code, introduce a libipa Algorithm class which implements a base class with template parameters in libipa, and use it in each IPA. As we now won't need an algorithm class for each IPA, move the documentation to libipa, and make it agnostic of the IPA used. While at it, fix the IPU3::Algorithm::Awb documentation. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
2021-10-06ipa: ipu3: awb: Introduce Black Level CorrectionJean-Michel Hautbois
The pixels output by the camera normally include a black level, because sensors do not always report a signal level of '0' for black. Pixels at or below this level should be considered black and to achieve that, we need to substract an offset to all the pixels. This can be taken into account by reading the lowest value of a special region on sensors which is not exposed to light. This provides a substracting factor to be able to adjust the expected black levels in the resulting images. For a camera outputting 10-bit pixel values (in the range 0 to 1023) a typical black level might be 64. It is a fixed value, obtained by capturing a raw frame with minimum exposure and gain fixed to 1.0 while covering the sensor (the darker the better). We consider it good enough as a very first approximation, until we measure it during a tuning process and include it in a configuration file Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-08-20ipa: ipu3: Move IPU3 agc into algorithmsJean-Michel Hautbois
Now that the interface is properly used by the AGC class, move it into ipa::ipu3::algorithms and let the loops do the calls. As we need to exchange the exposure_ and gain_ by passing them through the FrameContext, use the calculated values in setControls() function to ease the reading. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-08-20ipa: ipu3: Move IPU3 awb into algorithmsJean-Michel Hautbois
Now that the interface is properly used by the AWB class, move it into ipa::ipu3::algorithms and let the loops do the calls. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-08-20ipa: ipu3: Introduce a modular tone mapping algorithmJean-Michel Hautbois
Introduce a new algorithm to manage the tone mapping handling of the IPU3. The initial algorithm is chosen to configure the gamma contrast curve which moves the implementation out of AWB for simplicity. As it is initialised with a default gamma value of 1.1, there is no need to use the default table at initialisation anymore. This demonstrates the way to use process() call when the EventStatReady comes in. The function calculates the LUT in the context of a frame, and when prepare() is called, the parameters are filled with the updated values. AGC is modified to take the new process interface into account. Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2021-08-20ipa: move libipa::Algorithm to ipa/ipu3/algorithmsJean-Michel Hautbois
The abstract Algorithm class was originally placed in libipa as an attempt define a generic algorithm container. This was a little optimistic and pushed a bit far too early. Move the Algorithm class into the IPU3 which is the only user of the class, as we adapt it to support modular algorithm components for the IPU3. Not documenting the namespace may cause issues with Doxygen in libipa. The file libipa.cpp is thus created as an empty file for now, but we can leverage it in the future to add more global libipa documentation, and possibly code too. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>