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generated by cgit v1.2.1 (git 2.18.0) at 2025-02-11 16:59:19 +0000
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2020, Raspberry Pi (Trading) Ltd.
 *
 * staggered_ctrl.cpp - Helper for writing staggered ctrls to a V4L2 device.
 */

#include "staggered_ctrl.h"

#include <algorithm>

#include <libcamera/controls.h>

#include "libcamera/internal/log.h"
#include "libcamera/internal/utils.h"
#include "libcamera/internal/v4l2_videodevice.h"

namespace libcamera {

LOG_DEFINE_CATEGORY(RPI_S_W);

namespace RPi {

void StaggeredCtrl::init(V4L2VideoDevice *dev,
	  std::initializer_list<std::pair<const uint32_t, uint8_t>> delayList)
{
	std::lock_guard<std::mutex> lock(lock_);

	dev_ = dev;
	delay_ = delayList;
	ctrl_.clear();

	/* Find the largest delay across all controls. */
	maxDelay_ = 0;
	for (auto const &p : delay_) {
		LOG(RPI_S_W, Info) << "Init ctrl "
				   << utils::hex(p.first) << " with delay "
				   << static_cast<int>(p.second);
		maxDelay_ = std::max(maxDelay_, p.second);
	}

	init_ = true;
}

void StaggeredCtrl::reset()
{
	std::lock_guard<std::mutex> lock(lock_);

	int lastSetCount = setCount_;
	std::unordered_map<uint32_t, int32_t> lastVal;

	/* Reset the counters. */
	setCount_ = getCount_ = 0;