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path: root/src/android/yuv/post_processor_yuv.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * request.cpp - Capture request handling
 */

#include <libcamera/request.h>

#include <map>

#include <libcamera/buffer.h>
#include <libcamera/camera.h>
#include <libcamera/control_ids.h>
#include <libcamera/stream.h>

#include "camera_controls.h"
#include "log.h"

/**
 * \file request.h
 * \brief Describes a frame capture request to be processed by a camera
 */

namespace libcamera {

LOG_DEFINE_CATEGORY(Request)

/**
 * \enum Request::Status
 * Request completion status
 * \var Request::RequestPending
 * The request hasn't completed yet
 * \var Request::RequestComplete
 * The request has completed
 * \var Request::RequestCancelled
 * The request has been cancelled due to capture stop
 */

/**
 * \class Request
 * \brief A frame capture request
 *
 * A Request allows an application to associate buffers and controls on a
 * per-frame basis to be queued to the camera device for processing.
 */

/**
 * \brief Create a capture request for a camera
 * \param[in] camera The camera that creates the request
 * \param[in] cookie Opaque cookie for application use
 *
 * The \a cookie is stored in the request and is accessible through the
 * cookie() method at any time. It is typically used by applications to map the
 * request to an external resource in the request completion handler, and is
 * completely opaque to libcamera.
 *
 */
Request::Request(Camera *camera, uint64_t cookie)
	: camera_(camera), cookie_(cookie), status_(RequestPending),
	  cancelled_(false)
{
	/**
	 * \todo Should the Camera expose a validator instance, to avoid
	 * creating a new instance for each request?
	 */
	validator_ = new CameraControlValidator(camera);
	controls_ = new ControlList(controls::controls, validator_);

	/**
	 * \todo: Add a validator for metadata controls.
	 */
	metadata_ = new ControlList(controls::controls);
}

Request::~Request()
{
	delete metadata_;
	delete controls_;
	delete validator_;
}

/**
 * \fn Request::controls()
 * \brief Retrieve the request's ControlList
 *
 * Requests store a list of controls to be applied to all frames captured for
 * the request. They are created with an empty list of controls that can be
 * accessed through this method and updated with ControlList::operator[]() or
 * ControlList::update().
 *
 * Only controls supported by the camera to which this request will be
 * submitted shall be included in the controls list. Attempting to add an
 * unsupported control causes undefined behaviour.
 *
 * \return A reference to the ControlList in this request
 */

/**
 * \fn Request::buffers()
 * \brief Retrieve the request's streams to buffers map
 *
 * Return a reference to the map that associates each Stream part of the
 * request to the FrameBuffer the Stream output should be directed to.
 *
 * \return The map of Stream to FrameBuffer
 */

/**
 * \brief Add a FrameBuffer with its associated Stream to the Request
 * \param[in] stream The stream the buffer belongs to
 * \param[in] buffer The FrameBuffer to add to the request
 *
 * A reference to the buffer is stored in the request. The caller is responsible