f84522d7cd
When retrieving the value from a `ControlValue` usually one of two things happen: a small, trivially copyable object is returned by value; or a view into the internal buffer is provided. This is true for everything except strings, which are returned in `std::string`, incurring the overhead of string construction. To guarantee no potentially "expensive" copies, use `std::string_view` pointing to the internal buffer to return the value. This is similar to how other array-like types are returned with a `Span<>`. This is an API break, but its scope is limited to just `properties::Model`. Bug: https://bugs.libcamera.org/show_bug.cgi?id=256 Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* {{mode|capitalize}} ID list
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*
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* This file is auto-generated. Do not edit.
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*/
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#pragma once
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#include <array>
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#include <map>
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#include <stdint.h>
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#include <string>
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#include <string_view>
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#include <libcamera/controls.h>
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namespace libcamera {
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namespace {{mode}} {
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extern const ControlIdMap {{mode}};
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{%- for vendor, ctrls in controls -%}
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{% if vendor != 'libcamera' %}
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namespace {{vendor}} {
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#define LIBCAMERA_HAS_{{vendor|upper}}_VENDOR_{{mode|upper}}
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{%- endif %}
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{% if ctrls %}
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enum {
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{%- for ctrl in ctrls %}
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{{ctrl.name|snake_case|upper}} = {{ctrl.id}},
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{%- endfor %}
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};
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{% endif %}
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{% for ctrl in ctrls -%}
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{% if ctrl.is_enum -%}
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enum {{ctrl.name}}Enum {
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{%- for enum in ctrl.enum_values %}
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{{enum.name}} = {{enum.value}},
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{%- endfor %}
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};
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extern const std::array<const ControlValue, {{ctrl.enum_values_count}}> {{ctrl.name}}Values;
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extern const std::map<std::string, {{ctrl.type}}> {{ctrl.name}}NameValueMap;
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{% endif -%}
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extern const Control<{{ctrl.type}}> {{ctrl.name}};
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#define LIBCAMERA_HAS_{{vendor|upper}}_VENDOR_{{mode|upper}}_{{ctrl.name|snake_case|upper}}
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{% endfor -%}
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{% if vendor != 'libcamera' %}
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} /* namespace {{vendor}} */
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{% endif -%}
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{% endfor %}
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} /* namespace {{mode}} */
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} /* namespace libcamera */
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