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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-06-26 03:22:04 +0300
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-06-29 00:43:46 +0300
commit12809ff171aee57b306a9b29d6593793ea984ae6 (patch)
tree8b9620ac651c058dec3499b3a8aace4b230c35fd /src/qcam/assets/feathericons/calendar.svg
parent535820fe51ac9881ae3562ffd4a69ef3359f85f6 (diff)
libcamera: pipeline: simple: converter: Improve error message
When the configuration of the converter fails due to format mismatch, the error messages only indicates that a failure occurred. Improve it to ease debugging by printing the requested and obtained formats. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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generated by cgit v1.2.1 (git 2.18.0) at 2024-12-29 02:52:13 +0000
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * v4l2_device.cpp - Common base for V4L2 video devices and subdevices
 */

#include "v4l2_device.h"

#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>

#include "log.h"
#include "v4l2_controls.h"

/**
 * \file v4l2_device.h
 * \brief Common base for V4L2 devices and subdevices
 */

namespace libcamera {

LOG_DEFINE_CATEGORY(V4L2)

/**
 * \class V4L2Device
 * \brief Base class for V4L2VideoDevice and V4L2Subdevice
 *
 * The V4L2Device class groups together the methods and fields common to
 * both the V4L2VideoDevice and V4L2Subdevice classes, and provides a base
 * class whith methods to open and close the device node associated with the
 * device and to perform IOCTL system calls on it.
 *
 * The V4L2Device class cannot be instantiated directly, as its constructor
 * is protected. Users should instead create instances of one the derived
 * classes to model either a V4L2 video device or a V4L2 subdevice.
 */

/**
 * \brief Construct a V4L2Device
 * \param[in] deviceNode The device node filesystem path
 *
 * Initialize the file descriptor to -1 and store the \a deviceNode to be used
 * at open() time, and the \a logTag to prefix log messages with.
 */
V4L2Device::V4L2Device(const std::string &deviceNode)
	: deviceNode_(deviceNode), fd_(-1)
{
}

/**
 * \brief Destroy a V4L2Device
 */
V4L2Device::~V4L2Device()
{
}

/**
 * \brief Open a V4L2 device node
 * \param[in] flags Access mode flags
 *
 * Open the device node path with the provided access mode \a flags and
 * initialize the file descriptor, which was initially set to -1.
 *
 * \return 0 on success or a negative error code otherwise
 */
int V4L2Device::open(unsigned int flags)
{
	if (isOpen()) {
		LOG(V4L2, Error) << "Device already open";
		return -EBUSY;
	}

	int ret = ::open(deviceNode_.c_str(), flags);
	if (ret < 0) {
		ret = -errno;