libcamera v0.6.0 Supporting cameras in Linux since 2019

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control_serializer.h
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1/* SPDX-License-Identifier: LGPL-2.1-or-later */
2/*
3 * Copyright (C) 2019, Google Inc.
4 *
5 * Control (de)serializer
6 */
7
8#pragma once
9
10#include <map>
11#include <memory>
12#include <vector>
13
14#include <libcamera/controls.h>
15
16 namespace libcamera {
17
18 class ByteStreamBuffer;
19
20 class ControlSerializer
21{
22 public:
23 enum class Role {
24 Proxy,
25 Worker
26 };
27
28 ControlSerializer(Role role);
29
30 void reset();
31
32 static size_t binarySize(const ControlInfoMap &infoMap);
33 static size_t binarySize(const ControlList &list);
34
35 int serialize(const ControlInfoMap &infoMap, ByteStreamBuffer &buffer);
36 int serialize(const ControlList &list, ByteStreamBuffer &buffer);
37
38 template<typename T>
39 T deserialize(ByteStreamBuffer &buffer);
40
41 bool isCached(const ControlInfoMap &infoMap);
42
43 private:
44 static size_t binarySize(const ControlValue &value);
45 static size_t binarySize(const ControlInfo &info);
46
47 static void store(const ControlValue &value, ByteStreamBuffer &buffer);
48 static void store(const ControlInfo &info, ByteStreamBuffer &buffer);
49
50 void populateControlValueEntry(struct ipa_control_value_entry &entry,
51 const ControlValue &value,
52 uint32_t offset);
53
54 ControlValue loadControlValue(ByteStreamBuffer &buffer,
55 ControlType type,
56 bool isArray, unsigned int count);
57
58 unsigned int serial_;
59 unsigned int serialSeed_;
60 std::vector<std::unique_ptr<ControlId>> controlIds_;
61 std::vector<std::unique_ptr<ControlIdMap>> controlIdMaps_;
62 std::map<unsigned int, ControlInfoMap> infoMaps_;
63 std::map<const ControlInfoMap *, unsigned int> infoMapHandles_;
64};
65
66} /* namespace libcamera */
libcamera::ByteStreamBuffer
Wrap a memory buffer and provide sequential data read and write.
Definition byte_stream_buffer.h:20
libcamera::ControlInfoMap
A map of ControlId to ControlInfo.
Definition controls.h:365
libcamera::ControlInfo
Describe the limits of valid values for a Control.
Definition controls.h:330
libcamera::ControlList
Associate a list of ControlId with their values for an object.
Definition controls.h:409
libcamera::ControlSerializer::binarySize
static size_t binarySize(const ControlInfoMap &infoMap)
Retrieve the size in bytes required to serialize a ControlInfoMap.
Definition control_serializer.cpp:164
libcamera::ControlSerializer::ControlSerializer
ControlSerializer(Role role)
Construct a new ControlSerializer.
Definition control_serializer.cpp:106
libcamera::ControlSerializer::reset
void reset()
Reset the serializer.
Definition control_serializer.cpp:135
libcamera::ControlSerializer::isCached
bool isCached(const ControlInfoMap &infoMap)
Check if a ControlInfoMap is cached.
Definition control_serializer.cpp:675
libcamera::ControlSerializer::Role
Role
Define the role of the IPC component using the control serializer.
Definition control_serializer.h:23
libcamera::ControlSerializer::Role::Worker
@ Worker
The control serializer is used by the IPC ProxyWorker classes.
Definition control_serializer.h:25
libcamera::ControlSerializer::Role::Proxy
@ Proxy
The control serializer is used by the IPC Proxy classes.
Definition control_serializer.h:24
libcamera::ControlSerializer::deserialize
T deserialize(ByteStreamBuffer &buffer)
Deserialize an object from a binary buffer.
libcamera::ControlSerializer::serialize
int serialize(const ControlInfoMap &infoMap, ByteStreamBuffer &buffer)
Serialize a ControlInfoMap in a buffer.
Definition control_serializer.cpp:226
libcamera::ControlValue
Abstract type representing the value of a control.
Definition controls.h:134
controls.h
Framework to manage controls related to an object.
libcamera
Top-level libcamera namespace.
Definition backtrace.h:17
libcamera::ControlType
ControlType
Define the data type of a Control.
Definition controls.h:29
libcamera::ipa_control_value_entry
Description of a serialized ControlValue entry.
Definition ipa_controls.h:36