From 07a1ac5f01caf27aa309e4e743961123d3609291 Mon Sep 17 00:00:00 2001 From: Jacopo Mondi Date: Mon, 7 Aug 2023 09:33:45 +0200 Subject: libcamera: Break-out DeviceMatch The DeviceMatch class is defined inside the 'device_enumerator' file. Break it out to a dedicated file and header in order to expand it to support multiple matching criteria. Signed-off-by: Jacopo Mondi --- src/libcamera/device_enumerator.cpp | 73 ----------------------------- src/libcamera/device_match.cpp | 92 +++++++++++++++++++++++++++++++++++++ src/libcamera/meson.build | 1 + 3 files changed, 93 insertions(+), 73 deletions(-) create mode 100644 src/libcamera/device_match.cpp (limited to 'src') diff --git a/src/libcamera/device_enumerator.cpp b/src/libcamera/device_enumerator.cpp index f2e055de..49afd783 100644 --- a/src/libcamera/device_enumerator.cpp +++ b/src/libcamera/device_enumerator.cpp @@ -40,79 +40,6 @@ namespace libcamera { LOG_DEFINE_CATEGORY(DeviceEnumerator) -/** - * \class DeviceMatch - * \brief Description of a media device search pattern - * - * The DeviceMatch class describes a media device using properties from the - * Media Controller struct media_device_info, entity names in the media graph - * or other properties that can be used to identify a media device. - * - * The description is meant to be filled by pipeline managers and passed to a - * device enumerator to find matching media devices. - * - * A DeviceMatch is created with a specific Linux device driver in mind, - * therefore the name of the driver is a required property. One or more Entity - * names can be added as match criteria. - * - * Pipeline handlers are recommended to add entities to DeviceMatch as - * appropriare to ensure that the media device they need can be uniquely - * identified. This is useful when the corresponding kernel driver can produce - * different graphs, for instance as a result of different driver versions or - * hardware configurations, and not all those graphs are suitable for a pipeline - * handler. - */ - -/** - * \brief Construct a media device search pattern - * \param[in] driver The Linux device driver name that created the media device - */ -DeviceMatch::DeviceMatch(const std::string &driver) - : driver_(driver) -{ -} - -/** - * \brief Add a media entity name to the search pattern - * \param[in] entity The name of the entity in the media graph - */ -void DeviceMatch::add(const std::string &entity) -{ - entities_.push_back(entity); -} - -/** - * \brief Compare a search pattern with a media device - * \param[in] device The media device - * - * Matching is performed on the Linux device driver name and entity names from - * the media graph. A match is found if both the driver name matches and the - * media device contains all the entities listed in the search pattern. - * - * \return true if the media device matches the search pattern, false otherwise - */ -bool DeviceMatch::match(const MediaDevice *device) const -{ - if (driver_ != device->driver()) - return false; - - for (const std::string &name : entities_) { - bool found = false; - - for (const MediaEntity *entity : device->entities()) { - if (name == entity->name()) { - found = true; - break; - } - } - - if (!found) - return false; - } - - return true; -} - /** * \class DeviceEnumerator * \brief Enumerate, store and search media devices diff --git a/src/libcamera/device_match.cpp b/src/libcamera/device_match.cpp new file mode 100644 index 00000000..a51b9081 --- /dev/null +++ b/src/libcamera/device_match.cpp @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2023, Ideas On Board Oy + * + * device_match.cpp - Match and identify devices to create cameras with + */ + +#include "libcamera/internal/device_match.h" + +#include "libcamera/internal/media_device.h" + +/** + * \file device_match.h + * \brief Define types and functions to identify devices used to create cameras + */ + +namespace libcamera { + +/** + * \class DeviceMatch + * \brief Description of a media device search pattern + * + * The DeviceMatch class describes a media device using properties from the + * Media Controller struct media_device_info, entity names in the media graph + * or other properties that can be used to identify a media device. + * + * The description is meant to be filled by pipeline managers and passed to a + * device enumerator to find matching media devices. + * + * A DeviceMatch is created with a specific Linux device driver in mind, + * therefore the name of the driver is a required property. One or more Entity + * names can be added as match criteria. + * + * Pipeline handlers are recommended to add entities to DeviceMatch as + * appropriare to ensure that the media device they need can be uniquely + * identified. This is useful when the corresponding kernel driver can produce + * different graphs, for instance as a result of different driver versions or + * hardware configurations, and not all those graphs are suitable for a pipeline + * handler. + */ + +/** + * \brief Construct a media device search pattern + * \param[in] driver The Linux device driver name that created the media device + */ +DeviceMatch::DeviceMatch(const std::string &driver) + : driver_(driver) +{ +} + +/** + * \brief Add a media entity name to the search pattern + * \param[in] entity The name of the entity in the media graph + */ +void DeviceMatch::add(const std::string &entity) +{ + entities_.push_back(entity); +} + +/** + * \brief Compare a search pattern with a media device + * \param[in] device The media device + * + * Matching is performed on the Linux device driver name and entity names from + * the media graph. A match is found if both the driver name matches and the + * media device contains all the entities listed in the search pattern. + * + * \return True if the media device matches the search pattern, false otherwise + */ +bool DeviceMatch::match(const MediaDevice *device) const +{ + if (driver_ != device->driver()) + return false; + + for (const std::string &name : entities_) { + bool found = false; + + for (const MediaEntity *entity : device->entities()) { + if (name == entity->name()) { + found = true; + break; + } + } + + if (!found) + return false; + } + + return true; +} + +} /* namespace libcamera */ diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build index b24f8296..d5562afc 100644 --- a/src/libcamera/meson.build +++ b/src/libcamera/meson.build @@ -17,6 +17,7 @@ libcamera_sources = files([ 'delayed_controls.cpp', 'device_enumerator.cpp', 'device_enumerator_sysfs.cpp', + 'device_match.cpp', 'fence.cpp', 'formats.cpp', 'framebuffer.cpp', -- cgit v1.2.1