/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2019, Google Inc. * * control_serialization.cpp - Serialize and deserialize controls */ #include <iostream> #include <libcamera/camera.h> #include <libcamera/control_ids.h> #include <libcamera/controls.h> #include "libcamera/internal/byte_stream_buffer.h" #include "libcamera/internal/control_serializer.h" #include "serialization_test.h" #include "test.h" using namespace std; using namespace libcamera; class ControlSerializationTest : public SerializationTest { protected: int init() override { return status_; } int run() override { ControlSerializer serializer(ControlSerializer::Role::Proxy); ControlSerializer deserializer(ControlSerializer::Role::Worker); std::vector<uint8_t> infoData; std::vector<uint8_t> listData; size_t size; int ret; /* Create a control list with three controls. */ const ControlInfoMap &infoMap = camera_->controls(); ControlList list(infoMap); list.set(controls::Brightness, 0.5f); list.set(controls::Contrast, 1.2f); list.set(controls::Saturation, 0.2f); /* * Serialize the control list, this should fail as the control * info map hasn't been serialized. */ size = serializer.binarySize(list); listData.resize(size); ByteStreamBuffer buffer(listData.data(), listData.size()); ret = serializer.serialize(list, buffer); if (!ret) { cerr << "List serialization without info map should have failed" << endl; return TestFail; } if (buffer.overflow() || buffer.offset()) { cerr << "Failed list serialization modified the buffer" << endl; return TestFail; } /* Serialize the control info map. */ size = serializer.binarySize(infoMap); infoData.resize(size); buffer = ByteStreamBuffer(infoData.data(), infoData.size()); ret = serializer.serialize(infoMap, buffer); if (ret < 0) { cerr << "Failed to serialize ControlInfoMap" << endl; return TestFail; } if (buffer.overflow()) { cerr << "Overflow when serializing ControlInfoMap" << endl; return TestFail; } /* Serialize the control list, this should now succeed. */ size = serializer.binarySize(list); listData.resize(size); buffer = ByteStreamBuffer(listData.data(), listData.size()); ret = serializer.serialize(list, buffer); if (ret) { cerr << "Failed to serialize ControlList" << endl; return TestFail; } if (buffer.overflow()) { cerr << "Overflow when serializing ControlList" << endl; return TestFail; } /* * Deserialize the control list, this should fail as the control * info map hasn't been deserialized. */ buffer = ByteStreamBuffer(const_cast<const uint8_t *>(listData.data()), listData.size()); ControlList newList = deserializer.deserialize<ControlList>(buffer); if (!newList.empty()) { cerr << "List deserialization without info map should have failed" << endl; return TestFail; } if (buffer.overflow()) { cerr << "Failed list deserialization modified the buffer" << endl; return TestFail; } /* Deserialize the control info map and verify the contents. */ buffer = ByteStreamBuffer(const_cast<const uint8_t *>(infoData.data()), infoData.size()); ControlInfoMap newInfoMap = deserializer.deserialize<ControlInfoMap>(buffer); if (newInfoMap.empty()) { cerr << "Failed to deserialize ControlInfoMap" << endl; return TestFail; } if (buffer.overflow()) { cerr << "Overflow when deserializing ControlInfoMap" << endl; return TestFail; } if (!equals(infoMap, newInfoMap)) { cerr << "Deserialized map doesn't match original" << endl; return TestFail; } /* Make sure control limits looked up by id are not changed. */ const ControlInfo &newLimits = newInfoMap.at(&controls::Brightness); const ControlInfo &initialLimits = infoMap.at(&controls::Brightness); if (newLimits.min() != initialLimits.min() || newLimits.max() != initialLimits.max()) { cerr << "The brightness control limits have changed" << endl; return TestFail; } /* Deserialize the control list and verify the contents. */ buffer = ByteStreamBuffer(const_cast<const uint8_t *>(listData.data()), listData.size()); newList = deserializer.deserialize<ControlList>(buffer); if (newList.empty()) { cerr << "Failed to deserialize ControlList" << endl; return TestFail; } if (buffer.overflow()) { cerr << "Overflow when deserializing ControlList" << endl; return TestFail; } if (!equals(list, newList)) { cerr << "Deserialized list doesn't match original" << endl; return TestFail; } return TestPass; } }; TEST_REGISTER(ControlSerializationTest)