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path: root/src/ipa/ipu3/algorithms/agc.cpp
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2021-10-22ipa: ipu3: agc: Use filtered exposure valuesJean-Michel Hautbois
We are filtering the exposure value to limit the gain to apply, but we are not using the result. Fix it. 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>
2021-10-22ipa: ipu3: agc: Change analogue gain limitsJean-Michel Hautbois
The gains are currently set as a uint32_t while the analogue gain is passed as a double. We also have a default maximum analogue gain of 15 which is quite high for a number of sensors. Use a maximum value of 8 which should really be configured by the IPA and not fixed as it is now. While at it make it a double. 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>
2021-10-22ipa: ipu3: agc: Change exposure limitsJean-Michel Hautbois
We are using arbitrary constants for the exposure limit in a number of lines. Instead of using static constants for those, use the limits of the sensor passed in IPASessionConfiguration and cache those. 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>
2021-10-22ipa: ipu3: agc: Rename exposure values properlyJean-Michel Hautbois
The exposure value is filtered in filterExposure() using the currentExposure_ and setting a prevExposure_ variable. This is misnamed as it is not the previous exposure, but a filtered value. Rename it accordingly. 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>
2021-10-22ipa: ipu3: set frameContext before controlsJean-Michel Hautbois
The AGC frame context needs to be initialised correctly for the first iteration. Until now, the IPA uses the minimum exposure and gain values and caches those in local variables. In order to give the sensor limits to AGC, create a new structure in IPASessionConfiguration. Store the exposure in time (and not line duration) and the analogue gain after CameraSensorHelper conversion. Set the gain and exposure appropriately to the current values known to the IPA and remove the setting of exposure and gain in IPAIPU3 as those are now fully controlled by IPU3Agc. 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>
2021-10-19ipa: ipu3: agc: Remove "using" directive from agc.h headerLaurent Pinchart
"using" directives are harmful in headers, as they propagate the namespace short-circuit to all files that include the header, directly or indirectly. Drop the directive from agc.h, and use utils::Duration explicitly. While at it, shorten the namespace qualifier from libcamera::utils:: to utils:: in agc.cpp for Duration. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
2021-10-06ipa: ipu3: Replace ipa::ipu3::algorithms::Ipu3AwbCellJean-Michel Hautbois
The intel-ipu3.h public interface from the kernel does not define how to parse the statistics for a cell. This had to be identified by a process of reverse engineering, and later identifying the structures from [0] leading to our custom definition of struct Ipu3AwbCell. [0] https://chromium.googlesource.com/chromiumos/platform/arc-camera/+/refs/heads/master/hal/intel/include/ia_imaging/awb_public.h To improve the kernel interface, a proposal has been made to the linux-kernel [1] to incorporate the memory layout for each cell into the intel-ipu3 header directly. [1] https://lore.kernel.org/linux-media/20211005202019.253353-1-jeanmichel.hautbois@ideasonboard.com/ Update our local copy of the intel-ipu3.h to match the proposal and change the AGC and AWB algorithms to reference that structure directly, allowing us to remove the deprecated custom Ipu3AwbCell definition. 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>
2021-10-06ipa: ipu3: agc: Rewrite and simplify the brightness loopJean-Michel Hautbois
Now that we know how the AWB statistics are formatted, use a simplified loop in processBrightness() to parse the green values and get the histogram. 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>
2021-08-23ipa: ipu3: agc: remove local storage of the gridJean-Michel Hautbois
The IPASessionConfiguration now has the grid configuration stored. Use it at process() call in AGC and pass it as a reference to the private functions when needed. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@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>