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authorKaaira Gupta <kgupta@es.iitr.ac.in>2020-03-27 01:44:00 +0530
committerKieran Bingham <kieran.bingham@ideasonboard.com>2020-03-27 15:17:30 +0000
commit2fbab8b07748b790b5896c24a0aa09444ca48f97 (patch)
treefddd0cc0ab416706c2c626b74cecf8e8152699fc /test/controls
parent6f553040fddd35cd8d59d033bed4ab1b9c2dd634 (diff)
libcamera: v4l2PixelFormat: Replace hex with fourCC
Print fourCC characters instead of the hex value in toString() as they are more informative. Also, write the tests for this in formats.cpp Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'test/controls')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.1 (git 2.18.0) at 2025-06-07 01:44:18 +0000
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2020, Google Inc.
 *
 * ipc_pipe.cpp - Image Processing Algorithm IPC module for IPA proxies
 */

#include "libcamera/internal/ipc_pipe.h"

#include "libcamera/internal/log.h"

/**
 * \file ipc_pipe.h
 * \brief IPC mechanism for IPA isolation
 */

namespace libcamera {

LOG_DEFINE_CATEGORY(IPCPipe)

/**
 * \struct IPCMessage::Header
 * \brief Container for an IPCMessage header
 *
 * Holds a cmd code for the IPC message, and a cookie.
 */

/**
 * \var IPCMessage::Header::cmd
 * \brief Type of IPCMessage
 *
 * Typically used to carry a command code for an RPC.
 */

/**
 * \var IPCMessage::Header::cookie
 * \brief Cookie to identify the message and a corresponding reply.
 *
 * Populated and used by IPCPipe implementations for matching calls with
 * replies.
 */

/**
 * \class IPCMessage
 * \brief IPC message to be passed through IPC message pipe
 */

/**
 * \brief Construct an empty IPCMessage instance
 */
IPCMessage::IPCMessage()
	: header_(Header{ 0, 0 })
{
}

/**
 * \brief Construct an IPCMessage instance with a given command code
 * \param[in] cmd The command code
 */
IPCMessage::IPCMessage(uint32_t cmd)
	: header_(Header{ cmd, 0 })
{
}

/**
 * \brief Construct an IPCMessage instance with a given header
 * \param[in] header The header that the constructed IPCMessage will contain
 */
IPCMessage::IPCMessage(const Header &header)
	: header_(header)
{
}

/**
 * \brief Construct an IPCMessage instance from an IPC payload
 * \param[in] payload The IPCUnixSocket payload to construct from
 *
 * This essentially converts an IPCUnixSocket payload into an IPCMessage.
 * The header is extracted from the payload into the IPCMessage's header field.
 */
IPCMessage::IPCMessage(const IPCUnixSocket::Payload &payload)
{
	memcpy(&header_, payload.data.data(), sizeof(header_));
	data_ = std::vector<uint8_t>(payload.data.begin() + sizeof(header_),
				     payload.data.end());
	fds_ = payload.fds;
}

/**
 * \brief Create an IPCUnixSocket payload from the IPCMessage
 *
 * This essentially converts the IPCMessage into an IPCUnixSocket payload.
 *
 * \todo Resolve the layering violation (add other converters later?)
 */
IPCUnixSocket::Payload IPCMessage::payload() const
{
	IPCUnixSocket::Payload payload;

	payload.data.resize(sizeof(Header) + data_.size());
	payload.fds.reserve(fds_.size());

	memcpy(payload.data.data(), &header_, sizeof(Header));

	/* \todo Make this work without copy */
	memcpy(payload.data.data() + sizeof(Header), data_.data(), data_.size());
	payload.fds = fds_;

	return payload;
}

/**
 * \fn IPCMessage::header()
 * \brief Returns a reference to the header
 */

/**
 * \fn IPCMessage::data()
 * \brief Returns a reference to the byte vector containing data
 */

/**
 * \fn IPCMessage::fds()
 * \brief Returns a reference to the vector containing file descriptors
 */

/**
 * \fn IPCMessage::header() const
 * \brief Returns a const reference to the header
 */

/**
 * \fn IPCMessage::data() const
 * \brief Returns a const reference to the byte vector containing data
 */

/**
 * \fn IPCMessage::fds() const