# SPDX-License-Identifier: CC0-1.0 glib_dep = dependency('glib-2.0', required : get_option('gstreamer')) gst_dep_version = '>=1.14.0' gstvideo_dep = dependency('gstreamer-video-1.0', version : gst_dep_version, required : get_option('gstreamer')) gstallocator_dep = dependency('gstreamer-allocators-1.0', version : gst_dep_version, required : get_option('gstreamer')) if not glib_dep.found() or not gstvideo_dep.found() or not gstallocator_dep.found() gst_enabled = false subdir_done() endif gst_enabled = true libcamera_gst_sources = [ 'gstlibcamera-utils.cpp', 'gstlibcamera.cpp', 'gstlibcameraallocator.cpp', 'gstlibcamerapad.cpp', 'gstlibcamerapool.cpp', 'gstlibcameraprovider.cpp', 'gstlibcamerasrc.cpp', ] libcamera_gst_cpp_args = [ '-DVERSION="@0@"'.format(libcamera_git_version), '-DPACKAGE="@0@"'.format(meson.project_name()), '-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_40', ] # The G_DECLARE_FINAL_TYPE macro creates static inline functions that were # not marked as possibly unused prior to GLib v2.63.0. This causes clang to # complain about the ones we are not using. Silence the -Wunused-function # warning in that case. if cc.get_id() == 'clang' and glib_dep.version().version_compare('<2.63.0') libcamera_gst_cpp_args += ['-Wno-unused-function'] endif libcamera_gst = shared_library('gstlibcamera', libcamera_gst_sources, cpp_args : libcamera_gst_cpp_args, dependencies : [libcamera_private, gstvideo_dep, gstallocator_dep], install: true, install_dir : '@0@/gstreamer-1.0'.format(get_option('libdir')), ) next&id=3714034eb74d35ddf718997a48f49f095797058a'>refslogtreecommitdiff
path: root/src/libcamera/media_object.cpp
blob: ce77a72712d33ae88645a6660e166f7b300e9a23 (plain) 
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2018, Google Inc.
 *
 * media_object.cpp - Media device objects: entities, pads and links
 */

#include "libcamera/internal/media_object.h"

#include <errno.h>
#include <string>
#include <string.h>
#include <unistd.h>
#include <vector>

#include <linux/media.h>

#include "libcamera/internal/log.h"
#include "libcamera/internal/media_device.h"

/**
 * \file media_object.h
 * \brief Provides a class hierarchy that represents the  media objects exposed
 * by the Linux kernel Media Controller APIs.
 *
 * The abstract MediaObject class represents any Media Controller graph object
 * identified by an id unique in the media device context. It is subclassed by
 * the MediaEntity, MediaPad and MediaLink classes that represent the entities,
 * pads and links respectively. They are populated based on the media graph
 * information exposed by the Linux kernel through the MEDIA_IOC_G_TOPOLOGY
 * ioctl.
 *