libcamera/libcamera.git - libcamera official repository

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author	Naushir Patuck <naush@raspberrypi.com>	2023-07-25 09:55:40 +0100
committer	Naushir Patuck <naush@raspberrypi.com>	2023-09-04 11:13:27 +0100
commit	ad64716ce927e4fcb8882f16dacc4bfcd15a9305 (patch)
tree	e7b32e8902ce52059d55131f166ba536299bbc54 /src/py/examples/simple-cam.py
parent	74af791304822a8884398f4441ec9ef80cf76cb3 (diff)

pipeline: rpi: Simplify buffer id generation

Replace the buffer id generation in RPi::Stream with a simple integer counter since ids don't get recycled any more. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

Diffstat (limited to 'src/py/examples/simple-cam.py')

0 files changed, 0 insertions, 0 deletions

/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2021, Google Inc. * * camera_lens.cpp - A camera lens */ #include "libcamera/internal/camera_lens.h" #include <libcamera/base/utils.h> #include "libcamera/internal/v4l2_subdevice.h" /** * \file camera_lens.h * \brief A camera lens controller */ namespace libcamera { LOG_DEFINE_CATEGORY(CameraLens) /** * \class CameraLens * \brief A camera lens based on V4L2 subdevices * * The CameraLens class eases handling of lens for pipeline handlers by * hiding the details of the V4L2 subdevice kernel API and caching lens * information. */ /** * \brief Construct a CameraLens * \param[in] entity The media entity backing the camera lens controller * * Once constructed the instance must be initialized with init(). */ CameraLens::CameraLens(const MediaEntity *entity) : entity_(entity) { } /** * \brief Destroy a CameraLens */ CameraLens::~CameraLens() = default; /** * \brief Initialize the camera lens instance * * This function performs the initialisation steps of the CameraLens that may * fail. It shall be called once and only once after constructing the instance. * * \return 0 on success or a negative error code otherwise */ int CameraLens::init() { if (entity_->function() != MEDIA_ENT_F_LENS) { LOG(CameraLens, Error) << "Invalid lens function " << utils::hex(entity_->function()); return -EINVAL; } /* Create and open the subdev. */ subdev_ = std::make_unique<V4L2Subdevice>(entity_); int ret = subdev_->open(); if (ret < 0) return ret; ret = validateLensDriver(); if (ret) return ret; model_ = subdev_->model(); return 0; } /** * \brief This function sets the focal point of the lens to a specific position. * \param[in] position The focal point of the lens * * This function sets the value of focal point of the lens as in \a position. * * \return 0 on success or -EINVAL otherwise */ int CameraLens::setFocusPosition(int32_t position) { ControlList lensCtrls(subdev_->controls()); lensCtrls.set(V4L2_CID_FOCUS_ABSOLUTE, static_cast<int32_t>(position)); if (subdev_->setControls(&lensCtrls)) return -EINVAL; return 0; } int CameraLens::validateLensDriver() { int ret = 0; static constexpr uint32_t mandatoryControls[] = { V4L2_CID_FOCUS_ABSOLUTE, }; const ControlInfoMap &controls = subdev_->controls(); for (uint32_t ctrl : mandatoryControls) { if (!controls.count(ctrl)) { LOG(CameraLens, Error) << "Mandatory V4L2 control " << utils::hex(ctrl) << " not available"; ret = -EINVAL; } } if (ret) { LOG(CameraLens, Error) << "The lens kernel driver needs to be fixed"; LOG(CameraLens, Error) << "See Documentation/lens_driver_requirements.rst in" << " the libcamera sources for more information"; return ret; } return ret; } /** * \fn CameraLens::model() * \brief Retrieve the lens model name * * The lens model name is a free-formed string that uniquely identifies the * lens model. * * \return The lens model name */ std::string CameraLens::logPrefix() const { return "'" + entity_->name() + "'"; } /** * \fn CameraLens::controls() * \brief Retrieve the V4L2 controls of the lens' subdev * * \return A map of the V4L2 controls supported by the lens' driver */ const ControlInfoMap &CameraLens::controls() const { return subdev_->controls(); } } /* namespace libcamera */


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