libcamera/vivid.git - libcamera pipeline handler for VIVID

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author	David Plowman <david.plowman@raspberrypi.com>	2023-07-28 14:36:59 +0100
committer	Kieran Bingham <kieran.bingham@ideasonboard.com>	2023-09-04 17:47:35 +0100
commit	84b6327789fcf5be37a990d5be27f305e8514621 (patch)
tree	1884f3a18cbcb48275d75247ef2d5c17f372f290 /src/apps/cam
parent	2ea57d0b7702efb6e290f7ec2ef35b5646f91a6c (diff)

ipa: rpi: agc: Filter exposures before dealing with digital gain

We now time-filter the exposure before sorting out how much digital gain is required. This is actually a little more natural and simplifies the code. It also prepares us for some future work where this arrangement will be helpful. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Naushir Patuck <naush@raspberrpyi.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

Diffstat (limited to 'src/apps/cam')

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * ipa_manager.cpp - Image Processing Algorithm module manager
 */

#include "libcamera/internal/ipa_manager.h"

#include <algorithm>
#include <dirent.h>
#include <string.h>
#include <sys/types.h>

#include "libcamera/internal/file.h"
#include "libcamera/internal/ipa_module.h"
#include "libcamera/internal/ipa_proxy.h"
#include "libcamera/internal/log.h"
#include "libcamera/internal/pipeline_handler.h"
#include "libcamera/internal/utils.h"

/**
 * \file ipa_manager.h
 * \brief Image Processing Algorithm module manager
 */

namespace libcamera {

LOG_DEFINE_CATEGORY(IPAManager)

/**
 * \class IPAManager
 * \brief Manager for IPA modules
 *
 * The IPA module manager discovers IPA modules from disk, queries and loads
 * them, and creates IPA contexts. It supports isolation of the modules in a
 * separate process with IPC communication and offers a unified IPAInterface
 * view of the IPA contexts to pipeline handlers regardless of whether the
 * modules are isolated or loaded in the same process.
 *
 * Module isolation is based on the module licence. Open-source modules are
 * loaded without isolation, while closed-source module are forcefully isolated.
 * The isolation mechanism ensures that no code from a closed-source module is
 * ever run in the libcamera process.
 *
 * To create an IPA context, pipeline handlers call the IPAManager::createIPA()
 * method. For a directly loaded module, the manager calls the module's
 * ipaCreate() function directly and wraps the returned context in an
 * IPAContextWrapper that exposes an IPAInterface.
 *
 * ~~~~
 * +---------------+
 * |   Pipeline    |


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