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# SPDX-License-Identifier: GPL-2.0-only
#
# clang-format configuration file. Intended for clang-format >= 7.
#
# For more information, see:
#
#   Documentation/process/clang-format.rst
#   https://clang.llvm.org/docs/ClangFormat.html
#   https://clang.llvm.org/docs/ClangFormatStyleOptions.html
#
---
Language: Cpp
AccessModifierOffset: -8
AlignAfterOpenBracket: Align
AlignConsecutiveAssignments: false
AlignConsecutiveDeclarations: false
AlignEscapedNewlines: Right
AlignOperands: true
AlignTrailingComments: false
AllowAllParametersOfDeclarationOnNextLine: false
AllowShortBlocksOnASingleLine: false
AllowShortCaseLabelsOnASingleLine: false
AllowShortFunctionsOnASingleLine: InlineOnly
AllowShortIfStatementsOnASingleLine: false
AllowShortLoopsOnASingleLine: false
AlwaysBreakAfterDefinitionReturnType: None
AlwaysBreakAfterReturnType: None
AlwaysBreakBeforeMultilineStrings: false
AlwaysBreakTemplateDeclarations: MultiLine
BinPackArguments: true
BinPackParameters: true
BraceWrapping:
  AfterClass: true
  AfterControlStatement: false
  AfterEnum: false
  AfterFunction: true
  AfterNamespace: false
  AfterObjCDeclaration: false
  AfterStruct: false
  AfterUnion: false
  AfterExternBlock: false
  BeforeCatch: false
  BeforeElse: false
  IndentBraces: false
  SplitEmptyFunction: true
  SplitEmptyRecord: true
  SplitEmptyNamespace: true
BreakBeforeBinaryOperators: None
BreakBeforeBraces: Custom
BreakBeforeInheritanceComma: false
BreakInheritanceList: BeforeColon
BreakBeforeTernaryOperators: true
BreakConstructorInitializers: BeforeColon
BreakAfterJavaFieldAnnotations: false
BreakStringLiterals: false
ColumnLimit: 0
CommentPragmas: '^ IWYU pragma:'
CompactNamespaces: false
ConstructorInitializerAllOnOneLineOrOnePerLine: false
ConstructorInitializerIndentWidth: 8
ContinuationIndentWidth: 8
Cpp11BracedListStyle: false
DerivePointerAlignment: false
DisableFormat: false
ExperimentalAutoDetectBinPacking: false
FixNamespaceComments: true
ForEachMacros:
  - 'udev_list_entry_foreach'
IncludeBlocks: Regroup
IncludeCategories:
  # Headers matching the name of the component are matched automatically.
  # Priority 1
  # Other library headers (explicit overrides to match before system headers)
  - Regex:           '(<jpeglib.h>|<libudev.h>|<tiffio.h>|<xf86drm.h>|<xf86drmMode.h>|<yaml.h>)'
    Priority:        9
  # Qt includes (match before C++ standard library)
  - Regex:           '<Q([A-Za-z0-9\-_])+>'
    Priority:        9
  # Headers in <> with an extension. (+system libraries)
  - Regex:           '<([A-Za-z0-9\-_])+\.h>'
    Priority:        2
  # System headers 
  - Regex:           '<sys/.*>'
    Priority:        2
  # C++ standard library includes (no extension)
  - Regex:           '<([A-Za-z0-9\-_/])+>'
    Priority:        2
  # Linux headers, as a second group/subset of system headers
  - Regex:           '<linux/.*>'
    Priority:        3
  # Headers for libcamera Base support
  - Regex:           '<libcamera/base/private.h>'
    Priority:        4
  - Regex:           '<libcamera/base/.*\.h>'
    Priority:        5
  # Public API Headers for libcamera, which are not in a subdir (i.e. ipa/,internal/)
  - Regex:           '<libcamera/([A-Za-z0-9\-_])+.h>'
    Priority:        6
  # IPA Interfaces
  - Regex:           '<libcamera/ipa/.*\.h>'
    Priority:        7
  # libcamera Internal headers in ""  
  - Regex:           '"libcamera/internal/.*\.h"'
    Priority:        8
  # Other libraries headers with one group per library (.h or .hpp)
  - Regex:           '<.*/.*\.hp*>'
    Priority:        9
  # local modular includes "path/file.h" (.h or .hpp)
  - Regex:           '"(.*/)+.*\.hp*"'
    Priority:        10
  # Other local headers "file.h" with extension (.h or .hpp)
  - Regex:           '".*.hp*"'
    Priority:        11
  # Any unmatched line, separated from the last group
  - Regex:	     '"*"'
    Priority:        100

IncludeIsMainRegex: '(_test)?$'
IndentCaseLabels: false
IndentPPDirectives: None
IndentWidth: 8
IndentWrappedFunctionNames: false
JavaScriptQuotes: Leave
JavaScriptWrapImports: true
KeepEmptyLinesAtTheStartOfBlocks: false
MacroBlockBegin: ''
MacroBlockEnd: ''
MaxEmptyLinesToKeep: 1
NamespaceIndentation: None
ObjCBinPackProtocolList: Auto
ObjCBlockIndentWidth: 8
ObjCSpaceAfterProperty: true
ObjCSpaceBeforeProtocolList: true

# Taken from git's rules
PenaltyBreakAssignment: 10
PenaltyBreakBeforeFirstCallParameter: 30
PenaltyBreakComment: 10
PenaltyBreakFirstLessLess: 0
PenaltyBreakString: 10
PenaltyBreakTemplateDeclaration: 10
PenaltyExcessCharacter: 100
PenaltyReturnTypeOnItsOwnLine: 60

PointerAlignment: Right
ReflowComments: false
SortIncludes: true
SortUsingDeclarations: true
SpaceAfterCStyleCast: false
SpaceAfterTemplateKeyword: false
SpaceBeforeAssignmentOperators: true
SpaceBeforeCpp11BracedList: false
SpaceBeforeCtorInitializerColon: true
SpaceBeforeInheritanceColon: true
SpaceBeforeParens: ControlStatements
SpaceBeforeRangeBasedForLoopColon: true
SpaceInEmptyParentheses: false
SpacesBeforeTrailingComments: 1
SpacesInAngles: false
SpacesInContainerLiterals: false
SpacesInCStyleCastParentheses: false
SpacesInParentheses: false
SpacesInSquareBrackets: false
Standard: Cpp11
TabWidth: 8
UseTab: Always
...
span class="hl ppc"> #include <libcamera/formats.h> using namespace libcamera; static struct { GstVideoFormat gst_format; PixelFormat format; } format_map[] = { /* Compressed */ { GST_VIDEO_FORMAT_ENCODED, formats::MJPEG }, /* RGB */ { GST_VIDEO_FORMAT_RGB, formats::BGR888 }, { GST_VIDEO_FORMAT_BGR, formats::RGB888 }, { GST_VIDEO_FORMAT_ARGB, formats::BGRA8888 }, /* YUV Semiplanar */ { GST_VIDEO_FORMAT_NV12, formats::NV12 }, { GST_VIDEO_FORMAT_NV21, formats::NV21 }, { GST_VIDEO_FORMAT_NV16, formats::NV16 }, { GST_VIDEO_FORMAT_NV61, formats::NV61 }, { GST_VIDEO_FORMAT_NV24, formats::NV24 }, /* YUV Planar */ { GST_VIDEO_FORMAT_I420, formats::YUV420 }, { GST_VIDEO_FORMAT_YV12, formats::YVU420 }, { GST_VIDEO_FORMAT_Y42B, formats::YUV422 }, /* YUV Packed */ { GST_VIDEO_FORMAT_UYVY, formats::UYVY }, { GST_VIDEO_FORMAT_VYUY, formats::VYUY }, { GST_VIDEO_FORMAT_YUY2, formats::YUYV }, { GST_VIDEO_FORMAT_YVYU, formats::YVYU }, /* \todo NV42 is used in libcamera but is not mapped in GStreamer yet. */ }; static GstVideoFormat pixel_format_to_gst_format(const PixelFormat &format) { for (const auto &item : format_map) { if (item.format == format) return item.gst_format; } return GST_VIDEO_FORMAT_UNKNOWN; } static PixelFormat gst_format_to_pixel_format(GstVideoFormat gst_format) { if (gst_format == GST_VIDEO_FORMAT_ENCODED) return PixelFormat{}; for (const auto &item : format_map) if (item.gst_format == gst_format) return item.format; return PixelFormat{}; } static GstStructure * bare_structure_from_format(const PixelFormat &format) { GstVideoFormat gst_format = pixel_format_to_gst_format(format); if (gst_format == GST_VIDEO_FORMAT_UNKNOWN) return nullptr; if (gst_format != GST_VIDEO_FORMAT_ENCODED) return gst_structure_new("video/x-raw", "format", G_TYPE_STRING, gst_video_format_to_string(gst_format), nullptr); switch (format) { case formats::MJPEG: return gst_structure_new_empty("image/jpeg"); default: return nullptr; } } GstCaps * gst_libcamera_stream_formats_to_caps(const StreamFormats &formats) { GstCaps *caps = gst_caps_new_empty(); for (PixelFormat pixelformat : formats.pixelformats()) { g_autoptr(GstStructure) bare_s = bare_structure_from_format(pixelformat); if (!bare_s) { GST_WARNING("Unsupported DRM format %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS(pixelformat)); continue; } for (const Size &size : formats.sizes(pixelformat)) { GstStructure *s = gst_structure_copy(bare_s); gst_structure_set(s, "width", G_TYPE_INT, size.width, "height", G_TYPE_INT, size.height, nullptr); gst_caps_append_structure(caps, s); } const SizeRange &range = formats.range(pixelformat); if (range.hStep && range.vStep) { GstStructure *s = gst_structure_copy(bare_s); GValue val = G_VALUE_INIT; g_value_init(&val, GST_TYPE_INT_RANGE); gst_value_set_int_range_step(&val, range.min.width, range.max.width, range.hStep); gst_structure_set_value(s, "width", &val); gst_value_set_int_range_step(&val, range.min.height, range.max.height, range.vStep); gst_structure_set_value(s, "height", &val); g_value_unset(&val); gst_caps_append_structure(caps, s); } } return caps; } GstCaps * gst_libcamera_stream_configuration_to_caps(const StreamConfiguration &stream_cfg) { GstCaps *caps = gst_caps_new_empty(); GstStructure *s = bare_structure_from_format(stream_cfg.pixelFormat); gst_structure_set(s, "width", G_TYPE_INT, stream_cfg.size.width, "height", G_TYPE_INT, stream_cfg.size.height, nullptr); gst_caps_append_structure(caps, s); return caps; } void gst_libcamera_configure_stream_from_caps(StreamConfiguration &stream_cfg, GstCaps *caps) { GstVideoFormat gst_format = pixel_format_to_gst_format(stream_cfg.pixelFormat); guint i; gint best_fixed = -1, best_in_range = -1; GstStructure *s; /* * These are delta weight computed from: * ABS(width - stream_cfg.size.width) * ABS(height - stream_cfg.size.height) */ guint best_fixed_delta = G_MAXUINT; guint best_in_range_delta = G_MAXUINT; /* First fixate the caps using default configuration value. */ g_assert(gst_caps_is_writable(caps)); /* Lookup the structure for a close match to the stream_cfg.size */ for (i = 0; i < gst_caps_get_size(caps); i++) { s = gst_caps_get_structure(caps, i); gint width, height; guint delta; if (gst_structure_has_field_typed(s, "width", G_TYPE_INT) && gst_structure_has_field_typed(s, "height", G_TYPE_INT)) { gst_structure_get_int(s, "width", &width); gst_structure_get_int(s, "height", &height); delta = ABS(width - (gint)stream_cfg.size.width) * ABS(height - (gint)stream_cfg.size.height); if (delta < best_fixed_delta) { best_fixed_delta = delta; best_fixed = i; } } else { gst_structure_fixate_field_nearest_int(s, "width", stream_cfg.size.width); gst_structure_fixate_field_nearest_int(s, "height", stream_cfg.size.height); gst_structure_get_int(s, "width", &width); gst_structure_get_int(s, "height", &height); delta = ABS(width - (gint)stream_cfg.size.width) * ABS(height - (gint)stream_cfg.size.height); if (delta < best_in_range_delta) { best_in_range_delta = delta; best_in_range = i; } } } /* Prefer reliable fixed value over ranges */ if (best_fixed >= 0) s = gst_caps_get_structure(caps, best_fixed); else s = gst_caps_get_structure(caps, best_in_range); if (gst_structure_has_name(s, "video/x-raw")) { const gchar *format = gst_video_format_to_string(gst_format); gst_structure_fixate_field_string(s, "format", format); } /* Then configure the stream with the result. */ if (gst_structure_has_name(s, "video/x-raw")) { const gchar *format = gst_structure_get_string(s, "format"); gst_format = gst_video_format_from_string(format); stream_cfg.pixelFormat = gst_format_to_pixel_format(gst_format); } else if (gst_structure_has_name(s, "image/jpeg")) { stream_cfg.pixelFormat = formats::MJPEG; } else { g_critical("Unsupported media type: %s", gst_structure_get_name(s)); } gint width, height; gst_structure_get_int(s, "width", &width); gst_structure_get_int(s, "height", &height); stream_cfg.size.width = width; stream_cfg.size.height = height; } void gst_libcamera_resume_task(GstTask *task) { /* We only want to resume the task if it's paused. */ GLibLocker lock(GST_OBJECT(task)); if (GST_TASK_STATE(task) == GST_TASK_PAUSED) { GST_TASK_STATE(task) = GST_TASK_STARTED; GST_TASK_SIGNAL(task); } } G_LOCK_DEFINE_STATIC(cm_singleton_lock); static std::weak_ptr<CameraManager> cm_singleton_ptr; std::shared_ptr<CameraManager> gst_libcamera_get_camera_manager(int &ret) { std::shared_ptr<CameraManager> cm; G_LOCK(cm_singleton_lock); cm = cm_singleton_ptr.lock(); if (!cm) { cm = std::make_shared<CameraManager>(); cm_singleton_ptr = cm; ret = cm->start(); } else { ret = 0; } G_UNLOCK(cm_singleton_lock); return cm; }