diff --git a/graphics/mapper/stable-c/Android.bp b/graphics/mapper/stable-c/Android.bp
new file mode 100644
index 0000000..c03f67e
--- /dev/null
+++ b/graphics/mapper/stable-c/Android.bp
@@ -0,0 +1,104 @@
+/**
+ * Copyright (c) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "hardware_interfaces_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["hardware_interfaces_license"],
+}
+
+cc_library_headers {
+    name: "libimapper_stablec",
+    export_include_dirs: ["include"],
+    vendor_available: true,
+    header_libs: [
+        "libarect_headers",
+    ],
+    export_header_lib_headers: [
+        "libarect_headers",
+    ],
+}
+
+cc_library_headers {
+    name: "libimapper_providerutils",
+    vendor_available: true,
+    export_include_dirs: ["implutils/include"],
+    header_libs: [
+        "libbase_headers",
+        "libimapper_stablec",
+    ],
+    export_header_lib_headers: [
+        "libbase_headers",
+        "libimapper_stablec",
+    ],
+}
+
+cc_test {
+    name: "libimapper_providerutils_tests",
+    defaults: [
+        "android.hardware.graphics.allocator-ndk_shared",
+        "android.hardware.graphics.common-ndk_shared",
+    ],
+    header_libs: [
+        "libimapper_providerutils",
+    ],
+    srcs: [
+        "implutils/impltests.cpp",
+    ],
+    visibility: [":__subpackages__"],
+    cpp_std: "experimental",
+}
+
+cc_test {
+    name: "VtsHalGraphicsMapperStableC_TargetTest",
+    cpp_std: "experimental",
+    defaults: [
+        "VtsHalTargetTestDefaults",
+        "use_libaidlvintf_gtest_helper_static",
+        "android.hardware.graphics.allocator-ndk_shared",
+        "android.hardware.graphics.common-ndk_shared",
+    ],
+    srcs: [
+        "vts/VtsHalGraphicsMapperStableC_TargetTest.cpp",
+    ],
+
+    shared_libs: [
+        "libbinder_ndk",
+        "libbase",
+        "libsync",
+        "libvndksupport",
+    ],
+    static_libs: [
+        "libaidlcommonsupport",
+        "libgralloctypes",
+        "libgtest",
+    ],
+    header_libs: [
+        "libimapper_stablec",
+        "libimapper_providerutils",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    test_suites: [
+        "general-tests",
+        "vts",
+    ],
+}
diff --git a/graphics/mapper/stable-c/implutils/impltests.cpp b/graphics/mapper/stable-c/implutils/impltests.cpp
new file mode 100644
index 0000000..9c5d70b
--- /dev/null
+++ b/graphics/mapper/stable-c/implutils/impltests.cpp
@@ -0,0 +1,314 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <android/hardware/graphics/mapper/utils/IMapperMetadataTypes.h>
+#include <android/hardware/graphics/mapper/utils/IMapperProvider.h>
+#include <vector>
+
+using namespace ::android::hardware::graphics::mapper;
+using namespace ::aidl::android::hardware::graphics::common;
+
+// These tests are primarily interested in hitting all the different *types* that can be
+// serialized/deserialized than in exhaustively testing all the StandardMetadataTypes.
+// Exhaustive testing of the actual metadata types is relegated for IMapper's VTS suite
+// where meaning & correctness of values are more narrowly defined (eg, read-only values)
+
+TEST(Metadata, setGetBufferId) {
+    using BufferId = StandardMetadata<StandardMetadataType::BUFFER_ID>::value;
+
+    std::vector<char> buffer;
+    buffer.resize(12, 0);
+    *reinterpret_cast<int64_t*>(buffer.data()) = 42;
+
+    EXPECT_EQ(8, BufferId::encode(18, buffer.data(), 0));
+    EXPECT_EQ(42, *reinterpret_cast<int64_t*>(buffer.data()));
+    EXPECT_EQ(8, BufferId::encode(18, buffer.data(), buffer.size()));
+    EXPECT_EQ(18, *reinterpret_cast<int64_t*>(buffer.data()));
+    EXPECT_FALSE(BufferId::decode(buffer.data(), 0));
+    auto read = BufferId::decode(buffer.data(), buffer.size());
+    EXPECT_TRUE(read.has_value());
+    EXPECT_EQ(18, read.value_or(0));
+}
+
+TEST(Metadata, setGetDataspace) {
+    using DataspaceValue = StandardMetadata<StandardMetadataType::DATASPACE>::value;
+    using intType = std::underlying_type_t<Dataspace>;
+    std::vector<char> buffer;
+    buffer.resize(12, 0);
+
+    EXPECT_EQ(4, DataspaceValue::encode(Dataspace::BT2020, buffer.data(), 0));
+    EXPECT_EQ(0, *reinterpret_cast<intType*>(buffer.data()));
+    EXPECT_EQ(4, DataspaceValue::encode(Dataspace::BT2020, buffer.data(), buffer.size()));
+    EXPECT_EQ(static_cast<intType>(Dataspace::BT2020), *reinterpret_cast<intType*>(buffer.data()));
+    EXPECT_FALSE(DataspaceValue::decode(buffer.data(), 0));
+    auto read = DataspaceValue::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    EXPECT_EQ(Dataspace::BT2020, *read);
+}
+
+TEST(Metadata, setGetValidName) {
+    using NameValue = StandardMetadata<StandardMetadataType::NAME>::value;
+
+    std::vector<char> buffer;
+    buffer.resize(100, 'a');
+    buffer[buffer.size() - 1] = '\0';
+
+    // len("Hello") + sizeof(int64)
+    constexpr int expectedSize = 5 + sizeof(int64_t);
+    EXPECT_EQ(expectedSize, NameValue::encode("Hello", buffer.data(), buffer.size()));
+    EXPECT_EQ(5, *reinterpret_cast<int64_t*>(buffer.data()));
+    // Verify didn't write past the end of the desired size
+    EXPECT_EQ('a', buffer[expectedSize]);
+
+    auto readValue = NameValue::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(readValue.has_value());
+    EXPECT_EQ(5, readValue->length());
+    EXPECT_EQ("Hello", *readValue);
+}
+
+TEST(Metadata, setGetInvalidName) {
+    using NameValue = StandardMetadata<StandardMetadataType::NAME>::value;
+
+    std::vector<char> buffer;
+    buffer.resize(12, 'a');
+    buffer[buffer.size() - 1] = '\0';
+
+    // len("This is a long string") + sizeof(int64)
+    constexpr int expectedSize = 21 + sizeof(int64_t);
+    EXPECT_EQ(expectedSize,
+              NameValue::encode("This is a long string", buffer.data(), buffer.size()));
+    EXPECT_EQ(21, *reinterpret_cast<int64_t*>(buffer.data()));
+    // Verify didn't write the too-long string
+    EXPECT_EQ('a', buffer[9]);
+    EXPECT_EQ('\0', buffer[buffer.size() - 1]);
+
+    auto readValue = NameValue::decode(buffer.data(), buffer.size());
+    EXPECT_FALSE(readValue.has_value());
+    readValue = NameValue::decode(buffer.data(), 0);
+    ASSERT_FALSE(readValue.has_value());
+}
+
+TEST(Metadata, wouldOverflowName) {
+    using NameValue = StandardMetadata<StandardMetadataType::NAME>::value;
+    std::vector<char> buffer(100, 0);
+
+    // int_max + sizeof(int64) overflows int32
+    std::string_view bad_string{"badbeef", std::numeric_limits<int32_t>::max()};
+    EXPECT_EQ(-AIMAPPER_ERROR_BAD_VALUE,
+              NameValue::encode(bad_string, buffer.data(), buffer.size()));
+
+    // check barely overflows
+    bad_string = std::string_view{"badbeef", std::numeric_limits<int32_t>::max() - 7};
+    EXPECT_EQ(-AIMAPPER_ERROR_BAD_VALUE,
+              NameValue::encode(bad_string, buffer.data(), buffer.size()));
+}
+
+TEST(Metadata, setGetCompression) {
+    using CompressionValue = StandardMetadata<StandardMetadataType::COMPRESSION>::value;
+    ExtendableType myCompression{"bestest_compression_ever", 42};
+    std::vector<char> buffer(100, '\0');
+    const int expectedSize = myCompression.name.length() + sizeof(int64_t) + sizeof(int64_t);
+    EXPECT_EQ(expectedSize, CompressionValue::encode(myCompression, buffer.data(), 0));
+    EXPECT_EQ(0, buffer[0]);
+    EXPECT_EQ(expectedSize, CompressionValue::encode(myCompression, buffer.data(), buffer.size()));
+    EXPECT_EQ(myCompression.name.length(), *reinterpret_cast<int64_t*>(buffer.data()));
+    EXPECT_FALSE(CompressionValue::decode(buffer.data(), 0).has_value());
+    auto read = CompressionValue::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    EXPECT_EQ(myCompression, read.value());
+}
+
+TEST(Metadata, setGetPlaneLayout) {
+    using PlaneLayoutValue = StandardMetadata<StandardMetadataType::PLANE_LAYOUTS>::value;
+    PlaneLayout myPlaneLayout;
+    myPlaneLayout.offsetInBytes = 10;
+    myPlaneLayout.sampleIncrementInBits = 11;
+    myPlaneLayout.strideInBytes = 12;
+    myPlaneLayout.widthInSamples = 13;
+    myPlaneLayout.heightInSamples = 14;
+    myPlaneLayout.totalSizeInBytes = 15;
+    myPlaneLayout.horizontalSubsampling = 16;
+    myPlaneLayout.verticalSubsampling = 17;
+
+    myPlaneLayout.components.resize(3);
+    for (int i = 0; i < myPlaneLayout.components.size(); i++) {
+        auto& it = myPlaneLayout.components[i];
+        it.type = ExtendableType{"Plane ID", 40 + i};
+        it.offsetInBits = 20 + i;
+        it.sizeInBits = 30 + i;
+    }
+
+    std::vector<PlaneLayout> layouts{myPlaneLayout, PlaneLayout{}};
+
+    std::vector<char> buffer(5000, '\0');
+    constexpr int componentSize = 8 + (4 * sizeof(int64_t));
+    constexpr int firstLayoutSize = (8 + 1) * sizeof(int64_t) + (3 * componentSize);
+    constexpr int secondLayoutSize = (8 + 1) * sizeof(int64_t);
+    constexpr int expectedSize = firstLayoutSize + secondLayoutSize + sizeof(int64_t);
+    EXPECT_EQ(expectedSize, PlaneLayoutValue::encode(layouts, buffer.data(), 0));
+    EXPECT_EQ(0, buffer[0]);
+    EXPECT_EQ(expectedSize, PlaneLayoutValue::encode(layouts, buffer.data(), buffer.size()));
+    EXPECT_EQ(3, reinterpret_cast<int64_t*>(buffer.data())[1]);
+    EXPECT_EQ(8, reinterpret_cast<int64_t*>(buffer.data())[2]);
+    EXPECT_EQ(40, reinterpret_cast<int64_t*>(buffer.data())[4]);
+    EXPECT_EQ(31, reinterpret_cast<int64_t*>(buffer.data())[11]);
+    EXPECT_EQ(22, reinterpret_cast<int64_t*>(buffer.data())[15]);
+    EXPECT_EQ(10, reinterpret_cast<int64_t*>(buffer.data())[17]);
+    EXPECT_EQ(11, reinterpret_cast<int64_t*>(buffer.data())[18]);
+    EXPECT_FALSE(PlaneLayoutValue::decode(buffer.data(), 0).has_value());
+    auto read = PlaneLayoutValue::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    EXPECT_EQ(layouts, *read);
+}
+
+TEST(Metadata, setGetRects) {
+    using RectsValue = StandardMetadata<StandardMetadataType::CROP>::value;
+    std::vector<uint8_t> buffer(500, 0);
+    std::vector<Rect> cropRects{2};
+    cropRects[0] = Rect{10, 11, 12, 13};
+    cropRects[1] = Rect{20, 21, 22, 23};
+
+    constexpr int expectedSize = sizeof(int64_t) + (8 * sizeof(int32_t));
+    EXPECT_EQ(expectedSize, RectsValue::encode(cropRects, buffer.data(), buffer.size()));
+    EXPECT_EQ(2, reinterpret_cast<int64_t*>(buffer.data())[0]);
+    EXPECT_EQ(10, reinterpret_cast<int32_t*>(buffer.data())[2]);
+    auto read = RectsValue::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    EXPECT_EQ(cropRects.size(), read->size());
+    EXPECT_EQ(cropRects, *read);
+}
+
+TEST(Metadata, setGetSmpte2086) {
+    using Smpte2086Value = StandardMetadata<StandardMetadataType::SMPTE2086>::value;
+    Smpte2086 source;
+    source.minLuminance = 12.335f;
+    source.maxLuminance = 452.889f;
+    source.whitePoint = XyColor{-6.f, -9.f};
+    source.primaryRed = XyColor{.1f, .2f};
+    source.primaryGreen = XyColor{.3f, .4f};
+    source.primaryBlue = XyColor{.5f, .6f};
+
+    constexpr int expectedSize = 10 * sizeof(float);
+    std::vector<uint8_t> buffer(500, 0);
+    EXPECT_EQ(expectedSize, Smpte2086Value::encode(source, buffer.data(), buffer.size()));
+    auto read = Smpte2086Value::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    ASSERT_TRUE(read->has_value());
+    EXPECT_EQ(source, read->value());
+
+    // A valid encoding of a nullopt
+    read = Smpte2086Value::decode(nullptr, 0);
+    ASSERT_TRUE(read.has_value());
+    EXPECT_FALSE(read->has_value());
+}
+
+TEST(Metadata, setGetCta861_3) {
+    using Cta861_3Value = StandardMetadata<StandardMetadataType::CTA861_3>::value;
+    Cta861_3 source;
+    source.maxFrameAverageLightLevel = 244.55f;
+    source.maxContentLightLevel = 202.202f;
+
+    constexpr int expectedSize = 2 * sizeof(float);
+    std::vector<uint8_t> buffer(500, 0);
+    EXPECT_EQ(expectedSize, Cta861_3Value::encode(source, buffer.data(), buffer.size()));
+    auto read = Cta861_3Value::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    ASSERT_TRUE(read->has_value());
+    EXPECT_EQ(source, read->value());
+
+    // A valid encoding of a nullopt
+    read = Cta861_3Value::decode(nullptr, 0);
+    ASSERT_TRUE(read.has_value());
+    EXPECT_FALSE(read->has_value());
+}
+
+TEST(Metadata, setGetSmpte2094_10) {
+    using SMPTE2094_10Value = StandardMetadata<StandardMetadataType::SMPTE2094_10>::value;
+
+    std::vector<uint8_t> buffer(500, 0);
+    EXPECT_EQ(0, SMPTE2094_10Value::encode(std::nullopt, buffer.data(), buffer.size()));
+    auto read = SMPTE2094_10Value::decode(buffer.data(), 0);
+    ASSERT_TRUE(read.has_value());
+    EXPECT_FALSE(read->has_value());
+
+    const std::vector<uint8_t> emptyBuffer;
+    EXPECT_EQ(sizeof(int64_t),
+              SMPTE2094_10Value::encode(emptyBuffer, buffer.data(), buffer.size()));
+    read = SMPTE2094_10Value::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    ASSERT_TRUE(read->has_value());
+    EXPECT_EQ(0, read->value().size());
+
+    const std::vector<uint8_t> simpleBuffer{0, 1, 2, 3, 4, 5};
+    EXPECT_EQ(sizeof(int64_t) + 6,
+              SMPTE2094_10Value::encode(simpleBuffer, buffer.data(), buffer.size()));
+    read = SMPTE2094_10Value::decode(buffer.data(), buffer.size());
+    ASSERT_TRUE(read.has_value());
+    ASSERT_TRUE(read->has_value());
+    EXPECT_EQ(6, read->value().size());
+    EXPECT_EQ(simpleBuffer, read->value());
+}
+
+TEST(MetadataProvider, bufferId) {
+    using BufferId = StandardMetadata<StandardMetadataType::BUFFER_ID>::value;
+    std::vector<uint8_t> buffer(500, 0);
+    int result = provideStandardMetadata(StandardMetadataType::BUFFER_ID, buffer.data(),
+                                         buffer.size(), []<StandardMetadataType T>(auto&& provide) {
+                                             if constexpr (T == StandardMetadataType::BUFFER_ID) {
+                                                 return provide(42);
+                                             }
+                                             return 0;
+                                         });
+
+    EXPECT_EQ(8, result);
+    auto read = BufferId::decode(buffer.data(), buffer.size());
+    EXPECT_EQ(42, read.value_or(0));
+}
+
+TEST(MetadataProvider, allJumpsWork) {
+    const auto& values = ndk::internal::enum_values<StandardMetadataType>;
+    auto get = [](StandardMetadataType type) -> int {
+        return provideStandardMetadata(type, nullptr, 0, []<StandardMetadataType T>(auto&&) {
+            return static_cast<int>(T) + 100;
+        });
+    };
+
+    for (auto& type : values) {
+        const int expected = type == StandardMetadataType::INVALID ? -AIMAPPER_ERROR_UNSUPPORTED
+                                                                   : static_cast<int>(type) + 100;
+        EXPECT_EQ(expected, get(type));
+    }
+}
+
+TEST(MetadataProvider, invalid) {
+    int result = provideStandardMetadata(StandardMetadataType::INVALID, nullptr, 0,
+                                         []<StandardMetadataType T>(auto&&) { return 10; });
+
+    EXPECT_EQ(-AIMAPPER_ERROR_UNSUPPORTED, result);
+}
+
+TEST(MetadataProvider, outOfBounds) {
+    int result = provideStandardMetadata(static_cast<StandardMetadataType>(-1), nullptr, 0,
+                                         []<StandardMetadataType T>(auto&&) { return 10; });
+    EXPECT_EQ(-AIMAPPER_ERROR_UNSUPPORTED, result) << "-1 should have resulted in UNSUPPORTED";
+
+    result = provideStandardMetadata(static_cast<StandardMetadataType>(100), nullptr, 0,
+                                     []<StandardMetadataType T>(auto&&) { return 10; });
+    EXPECT_EQ(-AIMAPPER_ERROR_UNSUPPORTED, result)
+            << "100 (out of range) should have resulted in UNSUPPORTED";
+}
diff --git a/graphics/mapper/stable-c/implutils/include/android/hardware/graphics/mapper/utils/IMapperMetadataTypes.h b/graphics/mapper/stable-c/implutils/include/android/hardware/graphics/mapper/utils/IMapperMetadataTypes.h
new file mode 100644
index 0000000..7861af8
--- /dev/null
+++ b/graphics/mapper/stable-c/implutils/include/android/hardware/graphics/mapper/utils/IMapperMetadataTypes.h
@@ -0,0 +1,576 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <aidl/android/hardware/graphics/common/BlendMode.h>
+#include <aidl/android/hardware/graphics/common/BufferUsage.h>
+#include <aidl/android/hardware/graphics/common/Cta861_3.h>
+#include <aidl/android/hardware/graphics/common/Dataspace.h>
+#include <aidl/android/hardware/graphics/common/ExtendableType.h>
+#include <aidl/android/hardware/graphics/common/PixelFormat.h>
+#include <aidl/android/hardware/graphics/common/PlaneLayout.h>
+#include <aidl/android/hardware/graphics/common/PlaneLayoutComponent.h>
+#include <aidl/android/hardware/graphics/common/Rect.h>
+#include <aidl/android/hardware/graphics/common/Smpte2086.h>
+#include <aidl/android/hardware/graphics/common/StandardMetadataType.h>
+#include <aidl/android/hardware/graphics/common/XyColor.h>
+#include <android/hardware/graphics/mapper/IMapper.h>
+
+#include <cinttypes>
+#include <string_view>
+#include <type_traits>
+#include <vector>
+
+namespace android::hardware::graphics::mapper {
+
+using ::aidl::android::hardware::graphics::common::BlendMode;
+using ::aidl::android::hardware::graphics::common::BufferUsage;
+using ::aidl::android::hardware::graphics::common::Cta861_3;
+using ::aidl::android::hardware::graphics::common::Dataspace;
+using ::aidl::android::hardware::graphics::common::ExtendableType;
+using ::aidl::android::hardware::graphics::common::PixelFormat;
+using ::aidl::android::hardware::graphics::common::PlaneLayout;
+using ::aidl::android::hardware::graphics::common::PlaneLayoutComponent;
+using ::aidl::android::hardware::graphics::common::Rect;
+using ::aidl::android::hardware::graphics::common::Smpte2086;
+using ::aidl::android::hardware::graphics::common::StandardMetadataType;
+using ::aidl::android::hardware::graphics::common::XyColor;
+
+class MetadataWriter {
+  private:
+    uint8_t* _Nonnull mDest;
+    size_t mSizeRemaining = 0;
+    int32_t mDesiredSize = 0;
+
+    void* _Nullable reserve(size_t sizeToWrite) {
+        if (mDesiredSize < 0) {
+            // Error state
+            return nullptr;
+        }
+        if (__builtin_add_overflow(mDesiredSize, sizeToWrite, &mDesiredSize)) {
+            // Overflowed, abort writing any further data
+            mDesiredSize = -AIMAPPER_ERROR_BAD_VALUE;
+            mSizeRemaining = 0;
+            return nullptr;
+        }
+        if (sizeToWrite > mSizeRemaining) {
+            mSizeRemaining = 0;
+            return nullptr;
+        } else {
+            mSizeRemaining -= sizeToWrite;
+            uint8_t* whereToWrite = mDest;
+            mDest += sizeToWrite;
+            return whereToWrite;
+        }
+    }
+
+  public:
+    explicit MetadataWriter(void* _Nullable destBuffer, size_t destBufferSize)
+        : mDest(reinterpret_cast<uint8_t*>(destBuffer)), mSizeRemaining(destBufferSize) {}
+
+    int32_t desiredSize() const { return mDesiredSize; }
+
+    template <typename T, typename = std::enable_if_t<std::is_integral_v<T>>>
+    MetadataWriter& write(T value) {
+        auto sizeToWrite = sizeof(T);
+        if (void* dest = reserve(sizeToWrite)) {
+            memcpy(dest, &value, sizeToWrite);
+        }
+        return *this;
+    }
+
+    MetadataWriter& write(float value) {
+        auto sizeToWrite = sizeof(float);
+        if (void* dest = reserve(sizeToWrite)) {
+            memcpy(dest, &value, sizeToWrite);
+        }
+        return *this;
+    }
+
+    MetadataWriter& write(const std::string_view& value) {
+        auto sizeToWrite = value.length();
+        write<int64_t>(sizeToWrite);
+        if (void* dest = reserve(sizeToWrite)) {
+            memcpy(dest, value.data(), sizeToWrite);
+        }
+        return *this;
+    }
+
+    MetadataWriter& write(const std::vector<uint8_t>& value) {
+        auto sizeToWrite = value.size();
+        write<int64_t>(sizeToWrite);
+        if (void* dest = reserve(sizeToWrite)) {
+            memcpy(dest, value.data(), sizeToWrite);
+        }
+        return *this;
+    }
+
+    MetadataWriter& write(const ExtendableType& value) {
+        return write(value.name).write(value.value);
+    }
+
+    MetadataWriter& write(const XyColor& value) { return write(value.x).write(value.y); }
+};
+
+class MetadataReader {
+  private:
+    const uint8_t* _Nonnull mSrc;
+    size_t mSizeRemaining = 0;
+    bool mOk = true;
+
+    const void* _Nullable advance(size_t size) {
+        if (mOk && mSizeRemaining >= size) {
+            const void* buf = mSrc;
+            mSrc += size;
+            mSizeRemaining -= size;
+            return buf;
+        }
+        mOk = false;
+        return nullptr;
+    }
+
+  public:
+    explicit MetadataReader(const void* _Nonnull metadata, size_t metadataSize)
+        : mSrc(reinterpret_cast<const uint8_t*>(metadata)), mSizeRemaining(metadataSize) {}
+
+    [[nodiscard]] size_t remaining() const { return mSizeRemaining; }
+    [[nodiscard]] bool ok() const { return mOk; }
+
+    template <typename T, typename = std::enable_if_t<std::is_integral_v<T>>>
+    MetadataReader& read(T& dest) {
+        if (const void* src = advance(sizeof(T))) {
+            memcpy(&dest, src, sizeof(T));
+        }
+        return *this;
+    }
+
+    MetadataReader& read(float& dest) {
+        if (const void* src = advance(sizeof(float))) {
+            memcpy(&dest, src, sizeof(float));
+        }
+        return *this;
+    }
+
+    MetadataReader& read(std::string& dest) {
+        dest = readString();
+        return *this;
+    }
+
+    MetadataReader& read(ExtendableType& dest) {
+        dest.name = readString();
+        read(dest.value);
+        return *this;
+    }
+
+    MetadataReader& read(XyColor& dest) {
+        read(dest.x);
+        read(dest.y);
+        return *this;
+    }
+
+    template <typename T, typename = std::enable_if_t<std::is_integral_v<T>>>
+    [[nodiscard]] std::optional<T> readInt() {
+        auto sizeToRead = sizeof(T);
+        if (const void* src = advance(sizeof(T))) {
+            T ret;
+            memcpy(&ret, src, sizeToRead);
+            return ret;
+        }
+        return std::nullopt;
+    }
+
+    [[nodiscard]] std::string_view readString() {
+        auto lengthOpt = readInt<int64_t>();
+        if (!lengthOpt) {
+            return std::string_view{};
+        }
+        size_t length = lengthOpt.value();
+        if (const void* src = advance(length)) {
+            return std::string_view{reinterpret_cast<const char*>(src), length};
+        }
+        return std::string_view{};
+    }
+
+    [[nodiscard]] std::optional<ExtendableType> readExtendable() {
+        ExtendableType ret;
+        ret.name = readString();
+        auto value = readInt<int64_t>();
+        if (value) {
+            ret.value = value.value();
+            return ret;
+        } else {
+            return std::nullopt;
+        }
+    }
+
+    [[nodiscard]] std::vector<uint8_t> readBuffer() {
+        std::vector<uint8_t> ret;
+        size_t length = readInt<int64_t>().value_or(0);
+        if (const void* src = advance(length)) {
+            ret.resize(length);
+            memcpy(ret.data(), src, length);
+        }
+        return ret;
+    }
+};
+
+template <typename T, class Enable = void>
+struct MetadataValue {};
+
+template <typename T>
+struct MetadataValue<T, std::enable_if_t<std::is_integral_v<T>>> {
+    [[nodiscard]] static int32_t encode(T value, void* _Nullable destBuffer,
+                                        size_t destBufferSize) {
+        return MetadataWriter{destBuffer, destBufferSize}.write(value).desiredSize();
+    }
+
+    [[nodiscard]] static std::optional<T> decode(const void* _Nonnull metadata,
+                                                 size_t metadataSize) {
+        return MetadataReader{metadata, metadataSize}.readInt<T>();
+    }
+};
+
+template <typename T>
+struct MetadataValue<T, std::enable_if_t<std::is_enum_v<T>>> {
+    [[nodiscard]] static int32_t encode(T value, void* _Nullable destBuffer,
+                                        size_t destBufferSize) {
+        return MetadataWriter{destBuffer, destBufferSize}
+                .write(static_cast<std::underlying_type_t<T>>(value))
+                .desiredSize();
+    }
+
+    [[nodiscard]] static std::optional<T> decode(const void* _Nonnull metadata,
+                                                 size_t metadataSize) {
+        std::underlying_type_t<T> temp;
+        return MetadataReader{metadata, metadataSize}.read(temp).ok()
+                       ? std::optional<T>(static_cast<T>(temp))
+                       : std::nullopt;
+    }
+};
+
+template <>
+struct MetadataValue<std::string> {
+    [[nodiscard]] static int32_t encode(const std::string_view& value, void* _Nullable destBuffer,
+                                        size_t destBufferSize) {
+        return MetadataWriter{destBuffer, destBufferSize}.write(value).desiredSize();
+    }
+
+    [[nodiscard]] static std::optional<std::string> decode(const void* _Nonnull metadata,
+                                                           size_t metadataSize) {
+        auto reader = MetadataReader{metadata, metadataSize};
+        auto result = reader.readString();
+        return reader.ok() ? std::optional<std::string>{result} : std::nullopt;
+    }
+};
+
+template <>
+struct MetadataValue<ExtendableType> {
+    static_assert(sizeof(int64_t) == sizeof(ExtendableType::value));
+
+    [[nodiscard]] static int32_t encode(const ExtendableType& value, void* _Nullable destBuffer,
+                                        size_t destBufferSize) {
+        return MetadataWriter{destBuffer, destBufferSize}.write(value).desiredSize();
+    }
+
+    [[nodiscard]] static std::optional<ExtendableType> decode(const void* _Nonnull metadata,
+                                                              size_t metadataSize) {
+        return MetadataReader{metadata, metadataSize}.readExtendable();
+    }
+};
+
+template <>
+struct MetadataValue<std::vector<PlaneLayout>> {
+    [[nodiscard]] static int32_t encode(const std::vector<PlaneLayout>& values,
+                                        void* _Nullable destBuffer, size_t destBufferSize) {
+        MetadataWriter writer{destBuffer, destBufferSize};
+        writer.write<int64_t>(values.size());
+        for (const auto& value : values) {
+            writer.write<int64_t>(value.components.size());
+            for (const auto& component : value.components) {
+                writer.write(component.type)
+                        .write<int64_t>(component.offsetInBits)
+                        .write<int64_t>(component.sizeInBits);
+            }
+            writer.write<int64_t>(value.offsetInBytes)
+                    .write<int64_t>(value.sampleIncrementInBits)
+                    .write<int64_t>(value.strideInBytes)
+                    .write<int64_t>(value.widthInSamples)
+                    .write<int64_t>(value.heightInSamples)
+                    .write<int64_t>(value.totalSizeInBytes)
+                    .write<int64_t>(value.horizontalSubsampling)
+                    .write<int64_t>(value.verticalSubsampling);
+        }
+        return writer.desiredSize();
+    }
+
+    using DecodeResult = std::optional<std::vector<PlaneLayout>>;
+    [[nodiscard]] static DecodeResult decode(const void* _Nonnull metadata, size_t metadataSize) {
+        std::vector<PlaneLayout> values;
+        MetadataReader reader{metadata, metadataSize};
+        auto numPlanes = reader.readInt<int64_t>().value_or(0);
+        values.reserve(numPlanes);
+        for (int i = 0; i < numPlanes && reader.ok(); i++) {
+            PlaneLayout& value = values.emplace_back();
+            auto numPlaneComponents = reader.readInt<int64_t>().value_or(0);
+            value.components.reserve(numPlaneComponents);
+            for (int i = 0; i < numPlaneComponents && reader.ok(); i++) {
+                PlaneLayoutComponent& component = value.components.emplace_back();
+                reader.read(component.type)
+                        .read<int64_t>(component.offsetInBits)
+                        .read<int64_t>(component.sizeInBits);
+            }
+            reader.read<int64_t>(value.offsetInBytes)
+                    .read<int64_t>(value.sampleIncrementInBits)
+                    .read<int64_t>(value.strideInBytes)
+                    .read<int64_t>(value.widthInSamples)
+                    .read<int64_t>(value.heightInSamples)
+                    .read<int64_t>(value.totalSizeInBytes)
+                    .read<int64_t>(value.horizontalSubsampling)
+                    .read<int64_t>(value.verticalSubsampling);
+        }
+        return reader.ok() ? DecodeResult{std::move(values)} : std::nullopt;
+    }
+};
+
+template <>
+struct MetadataValue<std::vector<Rect>> {
+    [[nodiscard]] static int32_t encode(const std::vector<Rect>& value, void* _Nullable destBuffer,
+                                        size_t destBufferSize) {
+        MetadataWriter writer{destBuffer, destBufferSize};
+        writer.write<int64_t>(value.size());
+        for (auto& rect : value) {
+            writer.write<int32_t>(rect.left)
+                    .write<int32_t>(rect.top)
+                    .write<int32_t>(rect.right)
+                    .write<int32_t>(rect.bottom);
+        }
+        return writer.desiredSize();
+    }
+
+    using DecodeResult = std::optional<std::vector<Rect>>;
+    [[nodiscard]] static DecodeResult decode(const void* _Nonnull metadata, size_t metadataSize) {
+        MetadataReader reader{metadata, metadataSize};
+        std::vector<Rect> value;
+        auto numRects = reader.readInt<int64_t>().value_or(0);
+        value.reserve(numRects);
+        for (int i = 0; i < numRects && reader.ok(); i++) {
+            Rect& rect = value.emplace_back();
+            reader.read<int32_t>(rect.left)
+                    .read<int32_t>(rect.top)
+                    .read<int32_t>(rect.right)
+                    .read<int32_t>(rect.bottom);
+        }
+        return reader.ok() ? DecodeResult{std::move(value)} : std::nullopt;
+    }
+};
+
+template <>
+struct MetadataValue<std::optional<Smpte2086>> {
+    [[nodiscard]] static int32_t encode(const std::optional<Smpte2086>& optValue,
+                                        void* _Nullable destBuffer, size_t destBufferSize) {
+        if (optValue.has_value()) {
+            const auto& value = *optValue;
+            return MetadataWriter{destBuffer, destBufferSize}
+                    .write(value.primaryRed)
+                    .write(value.primaryGreen)
+                    .write(value.primaryBlue)
+                    .write(value.whitePoint)
+                    .write(value.maxLuminance)
+                    .write(value.minLuminance)
+                    .desiredSize();
+        } else {
+            return 0;
+        }
+    }
+
+    // Double optional because the value type itself is an optional<>
+    using DecodeResult = std::optional<std::optional<Smpte2086>>;
+    [[nodiscard]] static DecodeResult decode(const void* _Nullable metadata, size_t metadataSize) {
+        std::optional<Smpte2086> optValue{std::nullopt};
+        if (metadataSize > 0) {
+            Smpte2086 value;
+            MetadataReader reader{metadata, metadataSize};
+            reader.read(value.primaryRed)
+                    .read(value.primaryGreen)
+                    .read(value.primaryBlue)
+                    .read(value.whitePoint)
+                    .read(value.maxLuminance)
+                    .read(value.minLuminance);
+            if (reader.ok()) {
+                optValue = std::move(value);
+            } else {
+                return std::nullopt;
+            }
+        }
+        return DecodeResult{std::move(optValue)};
+    }
+};
+
+template <>
+struct MetadataValue<std::optional<Cta861_3>> {
+    [[nodiscard]] static int32_t encode(const std::optional<Cta861_3>& optValue,
+                                        void* _Nullable destBuffer, size_t destBufferSize) {
+        if (optValue.has_value()) {
+            const auto& value = *optValue;
+            return MetadataWriter{destBuffer, destBufferSize}
+                    .write(value.maxContentLightLevel)
+                    .write(value.maxFrameAverageLightLevel)
+                    .desiredSize();
+        } else {
+            return 0;
+        }
+    }
+
+    // Double optional because the value type itself is an optional<>
+    using DecodeResult = std::optional<std::optional<Cta861_3>>;
+    [[nodiscard]] static DecodeResult decode(const void* _Nullable metadata, size_t metadataSize) {
+        std::optional<Cta861_3> optValue{std::nullopt};
+        if (metadataSize > 0) {
+            MetadataReader reader{metadata, metadataSize};
+            Cta861_3 value;
+            reader.read(value.maxContentLightLevel).read(value.maxFrameAverageLightLevel);
+            if (reader.ok()) {
+                optValue = std::move(value);
+            } else {
+                return std::nullopt;
+            }
+        }
+        return DecodeResult{std::move(optValue)};
+    }
+};
+
+template <>
+struct MetadataValue<std::optional<std::vector<uint8_t>>> {
+    [[nodiscard]] static int32_t encode(const std::optional<std::vector<uint8_t>>& value,
+                                        void* _Nullable destBuffer, size_t destBufferSize) {
+        if (!value.has_value()) {
+            return 0;
+        }
+        return MetadataWriter{destBuffer, destBufferSize}.write(*value).desiredSize();
+    }
+
+    using DecodeResult = std::optional<std::optional<std::vector<uint8_t>>>;
+    [[nodiscard]] static DecodeResult decode(const void* _Nonnull metadata, size_t metadataSize) {
+        std::optional<std::vector<uint8_t>> optValue;
+        if (metadataSize > 0) {
+            MetadataReader reader{metadata, metadataSize};
+            auto value = reader.readBuffer();
+            if (reader.ok()) {
+                optValue = std::move(value);
+            } else {
+                return std::nullopt;
+            }
+        }
+        return DecodeResult{std::move(optValue)};
+    }
+};
+
+template <StandardMetadataType>
+struct StandardMetadata {};
+
+#define DEFINE_TYPE(name, typeArg)                                                            \
+    template <>                                                                               \
+    struct StandardMetadata<StandardMetadataType::name> {                                     \
+        using value_type = typeArg;                                                           \
+        using value = MetadataValue<value_type>;                                              \
+        static_assert(                                                                        \
+                StandardMetadataType::name ==                                                 \
+                        ndk::internal::enum_values<StandardMetadataType>[static_cast<size_t>( \
+                                StandardMetadataType::name)],                                 \
+                "StandardMetadataType must have equivalent value to index");                  \
+    }
+
+DEFINE_TYPE(BUFFER_ID, uint64_t);
+DEFINE_TYPE(NAME, std::string);
+DEFINE_TYPE(WIDTH, uint64_t);
+DEFINE_TYPE(HEIGHT, uint64_t);
+DEFINE_TYPE(LAYER_COUNT, uint64_t);
+DEFINE_TYPE(PIXEL_FORMAT_REQUESTED, PixelFormat);
+DEFINE_TYPE(PIXEL_FORMAT_FOURCC, uint32_t);
+DEFINE_TYPE(PIXEL_FORMAT_MODIFIER, uint64_t);
+DEFINE_TYPE(USAGE, BufferUsage);
+DEFINE_TYPE(ALLOCATION_SIZE, uint64_t);
+DEFINE_TYPE(PROTECTED_CONTENT, uint64_t);
+DEFINE_TYPE(COMPRESSION, ExtendableType);
+DEFINE_TYPE(INTERLACED, ExtendableType);
+DEFINE_TYPE(CHROMA_SITING, ExtendableType);
+DEFINE_TYPE(PLANE_LAYOUTS, std::vector<PlaneLayout>);
+DEFINE_TYPE(CROP, std::vector<Rect>);
+DEFINE_TYPE(DATASPACE, Dataspace);
+DEFINE_TYPE(BLEND_MODE, BlendMode);
+DEFINE_TYPE(SMPTE2086, std::optional<Smpte2086>);
+DEFINE_TYPE(CTA861_3, std::optional<Cta861_3>);
+DEFINE_TYPE(SMPTE2094_10, std::optional<std::vector<uint8_t>>);
+DEFINE_TYPE(SMPTE2094_40, std::optional<std::vector<uint8_t>>);
+
+#undef DEFINE_TYPE
+
+template <typename F, std::size_t... I>
+void invokeWithStandardMetadata(F&& f, StandardMetadataType type, std::index_sequence<I...>) {
+    // Setup the jump table, mapping from each type to a springboard that invokes the template
+    // function with the appropriate concrete type
+    using F_PTR = decltype(&f);
+    using THUNK = void (*)(F_PTR);
+    static constexpr auto jump = std::array<THUNK, sizeof...(I)>{[](F_PTR fp) {
+        constexpr StandardMetadataType type = ndk::internal::enum_values<StandardMetadataType>[I];
+        if constexpr (type != StandardMetadataType::INVALID) {
+            (*fp)(StandardMetadata<type>{});
+        }
+    }...};
+
+    auto index = static_cast<size_t>(type);
+    if (index >= 0 && index < jump.size()) {
+        jump[index](&f);
+    }
+}
+
+template <typename F, typename StandardMetadataSequence = std::make_index_sequence<
+                              ndk::internal::enum_values<StandardMetadataType>.size()>>
+int32_t provideStandardMetadata(StandardMetadataType type, void* _Nullable destBuffer,
+                                size_t destBufferSize, F&& f) {
+    int32_t retVal = -AIMAPPER_ERROR_UNSUPPORTED;
+    invokeWithStandardMetadata(
+            [&]<StandardMetadataType T>(StandardMetadata<T>) {
+                retVal = f.template operator()<T>(
+                        [&](const typename StandardMetadata<T>::value_type& value) -> int32_t {
+                            return StandardMetadata<T>::value::encode(value, destBuffer,
+                                                                      destBufferSize);
+                        });
+            },
+            type, StandardMetadataSequence{});
+    return retVal;
+}
+
+template <typename F, typename StandardMetadataSequence = std::make_index_sequence<
+                              ndk::internal::enum_values<StandardMetadataType>.size()>>
+AIMapper_Error applyStandardMetadata(StandardMetadataType type, const void* _Nonnull metadata,
+                                     size_t metadataSize, F&& f) {
+    AIMapper_Error retVal = AIMAPPER_ERROR_UNSUPPORTED;
+    invokeWithStandardMetadata(
+            [&]<StandardMetadataType T>(StandardMetadata<T>) {
+                auto value = StandardMetadata<T>::value::decode(metadata, metadataSize);
+                if (value.has_value()) {
+                    retVal = f.template operator()<T>(std::move(*value));
+                } else {
+                    retVal = AIMAPPER_ERROR_BAD_VALUE;
+                }
+            },
+            type, StandardMetadataSequence{});
+    return retVal;
+}
+
+}  // namespace android::hardware::graphics::mapper
\ No newline at end of file
diff --git a/graphics/mapper/stable-c/implutils/include/android/hardware/graphics/mapper/utils/IMapperProvider.h b/graphics/mapper/stable-c/implutils/include/android/hardware/graphics/mapper/utils/IMapperProvider.h
new file mode 100644
index 0000000..957fdc9
--- /dev/null
+++ b/graphics/mapper/stable-c/implutils/include/android/hardware/graphics/mapper/utils/IMapperProvider.h
@@ -0,0 +1,222 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android-base/unique_fd.h>
+#include <android/hardware/graphics/mapper/IMapper.h>
+#include <log/log.h>
+
+#include <mutex>
+#include <optional>
+#include <type_traits>
+
+/**
+ * Helper utilities for providing an IMapper-StableC implementation.
+ */
+
+namespace vendor::mapper {
+
+/**
+ * Extend from this interface to provide Version 5 of the IMapper interface
+ */
+struct IMapperV5Impl {
+    static const auto version = AIMAPPER_VERSION_5;
+    virtual ~IMapperV5Impl() = default;
+
+    virtual AIMapper_Error importBuffer(const native_handle_t* _Nonnull handle,
+                                        buffer_handle_t _Nullable* _Nonnull outBufferHandle) = 0;
+
+    virtual AIMapper_Error freeBuffer(buffer_handle_t _Nonnull buffer) = 0;
+
+    virtual AIMapper_Error getTransportSize(buffer_handle_t _Nonnull buffer,
+                                            uint32_t* _Nonnull outNumFds,
+                                            uint32_t* _Nonnull outNumInts) = 0;
+
+    virtual AIMapper_Error lock(buffer_handle_t _Nonnull buffer, uint64_t cpuUsage,
+                                ARect accessRegion, int acquireFence,
+                                void* _Nullable* _Nonnull outData) = 0;
+
+    virtual AIMapper_Error unlock(buffer_handle_t _Nonnull buffer, int* _Nonnull releaseFence) = 0;
+
+    virtual AIMapper_Error flushLockedBuffer(buffer_handle_t _Nonnull buffer) = 0;
+
+    virtual AIMapper_Error rereadLockedBuffer(buffer_handle_t _Nonnull buffer) = 0;
+
+    virtual int32_t getMetadata(buffer_handle_t _Nonnull buffer, AIMapper_MetadataType metadataType,
+                                void* _Nullable destBuffer, size_t destBufferSize) = 0;
+
+    virtual int32_t getStandardMetadata(buffer_handle_t _Nonnull buffer,
+                                        int64_t standardMetadataType, void* _Nullable destBuffer,
+                                        size_t destBufferSize) = 0;
+
+    virtual AIMapper_Error setMetadata(buffer_handle_t _Nonnull buffer,
+                                       AIMapper_MetadataType metadataType,
+                                       const void* _Nonnull metadata, size_t metadataSize) = 0;
+
+    virtual AIMapper_Error setStandardMetadata(buffer_handle_t _Nonnull buffer,
+                                               int64_t standardMetadataType,
+                                               const void* _Nonnull metadata,
+                                               size_t metadataSize) = 0;
+
+    virtual AIMapper_Error listSupportedMetadataTypes(
+            const AIMapper_MetadataTypeDescription* _Nullable* _Nonnull outDescriptionList,
+            size_t* _Nonnull outNumberOfDescriptions) = 0;
+
+    virtual AIMapper_Error dumpBuffer(buffer_handle_t _Nonnull bufferHandle,
+                                      AIMapper_DumpBufferCallback _Nonnull dumpBufferCallback,
+                                      void* _Null_unspecified context) = 0;
+
+    virtual AIMapper_Error dumpAllBuffers(
+            AIMapper_BeginDumpBufferCallback _Nonnull beginDumpBufferCallback,
+            AIMapper_DumpBufferCallback _Nonnull dumpBufferCallback,
+            void* _Null_unspecified context) = 0;
+
+    virtual AIMapper_Error getReservedRegion(buffer_handle_t _Nonnull buffer,
+                                             void* _Nullable* _Nonnull outReservedRegion,
+                                             uint64_t* _Nonnull outReservedSize) = 0;
+};
+
+namespace provider {
+#ifndef __cpp_inline_variables
+#error "Only C++17 & newer is supported; inline variables is missing"
+#endif
+
+inline void* _Nullable sIMapperInstance = nullptr;
+}  // namespace provider
+
+template <typename IMPL>
+class IMapperProvider {
+  private:
+    static_assert(IMPL::version >= AIMAPPER_VERSION_5, "Must be at least AIMAPPER_VERSION_5");
+    static_assert(std::is_final_v<IMPL>, "Implementation must be final");
+    static_assert(std::is_constructible_v<IMPL>, "Implementation must have a no-args constructor");
+
+    std::once_flag mLoadOnceFlag;
+    std::optional<IMPL> mImpl;
+    AIMapper mMapper = {};
+
+    static IMPL& impl() {
+        return *reinterpret_cast<IMapperProvider<IMPL>*>(provider::sIMapperInstance)->mImpl;
+    }
+
+    void bindV5() {
+        mMapper.v5 = {
+                .importBuffer = [](const native_handle_t* _Nonnull handle,
+                                   buffer_handle_t _Nullable* _Nonnull outBufferHandle)
+                        -> AIMapper_Error { return impl().importBuffer(handle, outBufferHandle); },
+
+                .freeBuffer = [](buffer_handle_t _Nonnull buffer) -> AIMapper_Error {
+                    return impl().freeBuffer(buffer);
+                },
+
+                .getTransportSize = [](buffer_handle_t _Nonnull buffer,
+                                       uint32_t* _Nonnull outNumFds,
+                                       uint32_t* _Nonnull outNumInts) -> AIMapper_Error {
+                    return impl().getTransportSize(buffer, outNumFds, outNumInts);
+                },
+
+                .lock = [](buffer_handle_t _Nonnull buffer, uint64_t cpuUsage, ARect accessRegion,
+                           int acquireFence, void* _Nullable* _Nonnull outData) -> AIMapper_Error {
+                    return impl().lock(buffer, cpuUsage, accessRegion, acquireFence, outData);
+                },
+
+                .unlock = [](buffer_handle_t _Nonnull buffer, int* _Nonnull releaseFence)
+                        -> AIMapper_Error { return impl().unlock(buffer, releaseFence); },
+
+                .flushLockedBuffer = [](buffer_handle_t _Nonnull buffer) -> AIMapper_Error {
+                    return impl().flushLockedBuffer(buffer);
+                },
+
+                .rereadLockedBuffer = [](buffer_handle_t _Nonnull buffer) -> AIMapper_Error {
+                    return impl().rereadLockedBuffer(buffer);
+                },
+
+                .getMetadata = [](buffer_handle_t _Nonnull buffer,
+                                  AIMapper_MetadataType metadataType, void* _Nullable destBuffer,
+                                  size_t destBufferSize) -> int32_t {
+                    return impl().getMetadata(buffer, metadataType, destBuffer, destBufferSize);
+                },
+
+                .getStandardMetadata = [](buffer_handle_t _Nonnull buffer,
+                                          int64_t standardMetadataType, void* _Nullable destBuffer,
+                                          size_t destBufferSize) -> int32_t {
+                    return impl().getStandardMetadata(buffer, standardMetadataType, destBuffer,
+                                                      destBufferSize);
+                },
+
+                .setMetadata = [](buffer_handle_t _Nonnull buffer,
+                                  AIMapper_MetadataType metadataType, const void* _Nonnull metadata,
+                                  size_t metadataSize) -> AIMapper_Error {
+                    return impl().setMetadata(buffer, metadataType, metadata, metadataSize);
+                },
+
+                .setStandardMetadata =
+                        [](buffer_handle_t _Nonnull buffer, int64_t standardMetadataType,
+                           const void* _Nonnull metadata, size_t metadataSize) -> AIMapper_Error {
+                    return impl().setStandardMetadata(buffer, standardMetadataType, metadata,
+                                                      metadataSize);
+                },
+
+                .listSupportedMetadataTypes =
+                        [](const AIMapper_MetadataTypeDescription* _Nullable* _Nonnull outDescriptionList,
+                           size_t* _Nonnull outNumberOfDescriptions) -> AIMapper_Error {
+                    return impl().listSupportedMetadataTypes(outDescriptionList,
+                                                             outNumberOfDescriptions);
+                },
+
+                .dumpBuffer = [](buffer_handle_t _Nonnull bufferHandle,
+                                 AIMapper_DumpBufferCallback _Nonnull dumpBufferCallback,
+                                 void* _Null_unspecified context) -> AIMapper_Error {
+                    return impl().dumpBuffer(bufferHandle, dumpBufferCallback, context);
+                },
+
+                .dumpAllBuffers =
+                        [](AIMapper_BeginDumpBufferCallback _Nonnull beginDumpBufferCallback,
+                           AIMapper_DumpBufferCallback _Nonnull dumpBufferCallback,
+                           void* _Null_unspecified context) {
+                            return impl().dumpAllBuffers(beginDumpBufferCallback,
+                                                         dumpBufferCallback, context);
+                        },
+
+                .getReservedRegion = [](buffer_handle_t _Nonnull buffer,
+                                        void* _Nullable* _Nonnull outReservedRegion,
+                                        uint64_t* _Nonnull outReservedSize) -> AIMapper_Error {
+                    return impl().getReservedRegion(buffer, outReservedRegion, outReservedSize);
+                },
+        };
+    }
+
+  public:
+    explicit IMapperProvider() = default;
+
+    AIMapper_Error load(AIMapper* _Nullable* _Nonnull outImplementation) {
+        std::call_once(mLoadOnceFlag, [this] {
+            LOG_ALWAYS_FATAL_IF(provider::sIMapperInstance != nullptr,
+                                "AIMapper implementation already loaded!");
+            provider::sIMapperInstance = this;
+            mImpl.emplace();
+            mMapper.version = IMPL::version;
+            if (IMPL::version >= AIMAPPER_VERSION_5) {
+                bindV5();
+            }
+        });
+        *outImplementation = &mMapper;
+        return AIMAPPER_ERROR_NONE;
+    }
+};
+
+}  // namespace vendor::mapper
diff --git a/graphics/mapper/stable-c/include/android/hardware/graphics/mapper/IMapper.h b/graphics/mapper/stable-c/include/android/hardware/graphics/mapper/IMapper.h
new file mode 100644
index 0000000..f27b0f4
--- /dev/null
+++ b/graphics/mapper/stable-c/include/android/hardware/graphics/mapper/IMapper.h
@@ -0,0 +1,689 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ *  IMapper Stable-C HAL interface
+ *
+ *  This file represents the sphal interface between libui & the IMapper HAL implementation.
+ *  A vendor implementation of this interface is retrieved by looking up the vendor imapper
+ *  implementation library via the IAllocator AIDL interface.
+ *
+ *  This interface is not intended for general use.
+ */
+
+#pragma once
+
+#include <sys/cdefs.h>
+#include <cinttypes>
+#include <cstddef>
+#include <type_traits>
+
+#include <android/rect.h>
+#include <cutils/native_handle.h>
+
+__BEGIN_DECLS
+
+/**
+ * AIMapper versioning
+ *
+ * IMapper versions 0-1 are pre-treble
+ * IMapper versions 2-4 are HIDL
+ * C-style AIMapper API starts at 5
+ */
+enum AIMapper_Version : uint32_t {
+    AIMAPPER_VERSION_5 = 5,
+};
+
+/**
+ * Possible AIMapper errors
+ * Values are the same as IMapper 4.0's Error type for simplicity
+ */
+enum AIMapper_Error : int32_t {
+    /**
+     * No error.
+     */
+    AIMAPPER_ERROR_NONE = 0,
+    /**
+     * Invalid BufferDescriptor.
+     */
+    AIMAPPER_ERROR_BAD_DESCRIPTOR = 1,
+    /**
+     * Invalid buffer handle.
+     */
+    AIMAPPER_ERROR_BAD_BUFFER = 2,
+    /**
+     * Invalid HardwareBufferDescription.
+     */
+    AIMAPPER_ERROR_BAD_VALUE = 3,
+    /**
+     * Resource unavailable.
+     */
+    AIMAPPER_ERROR_NO_RESOURCES = 5,
+    /**
+     * Permanent failure.
+     */
+    AIMAPPER_ERROR_UNSUPPORTED = 7,
+};
+
+/**
+ * MetadataType represents the different types of buffer metadata that could be
+ * associated with a buffer. It is used by IMapper to help get and set buffer metadata
+ * on the buffer's native handle.
+ *
+ * Standard buffer metadata will have the name field set to
+ * "android.hardware.graphics.common.StandardMetadataType" and will contain values
+ * from StandardMetadataType.aidl.
+ *
+ * Vendor-provided metadata should be prefixed with a "vendor.mycompanyname.*" namespace. It is
+ * recommended that the metadata follows the pattern of StandardMetadaType.aidl. That is, an
+ * aidl-defined enum with @VendorStability on it and the naming then matching that type such
+ * as "vendor.mycompanyname.graphics.common.MetadataType" with the value field then set to the
+ * aidl's enum value.
+ *
+ * Each company should create their own enum & namespace. The name
+ * field prevents values from different companies from colliding.
+ */
+typedef struct AIMapper_MetadataType {
+    const char* _Nonnull name;
+    int64_t value;
+} AIMapper_MetadataType;
+
+typedef struct AIMapper_MetadataTypeDescription {
+    /**
+     * The `name` of the metadataType must be valid for the lifetime of the process
+     */
+    AIMapper_MetadataType metadataType;
+    /**
+     * description should contain a string representation of the MetadataType.
+     *
+     * For example: "MyExampleMetadataType is a 64-bit timestamp in nanoseconds
+     * that indicates when a buffer is decoded. It is set by the media HAL after
+     * a buffer is decoded. It is used by the display HAL for hardware
+     * synchronization".
+     *
+     * This field is required for any non-StandardMetadataTypes. For StandardMetadataTypes this
+     * field may be null. The lifetime of this pointer must be valid for the duration of the
+     * process (that is, a static const char*).
+     */
+    const char* _Nullable description;
+    /**
+     * isGettable represents if the MetadataType can be get.
+     */
+    bool isGettable;
+    /**
+     * isSettable represents if the MetadataType can be set.
+     */
+    bool isSettable;
+
+    /** Reserved for future use; must be zero-initialized currently */
+    uint8_t reserved[32];
+} AIMapper_MetadataTypeDescription;
+
+/**
+ * Callback that is passed to dumpBuffer.
+ *
+ * @param context The caller-provided void* that was passed to dumpBuffer.
+ * @param metadataType The type of the metadata passed to the callback
+ * @param value A pointer to the value of the metadata. The lifetime of this pointer is only
+ *              valid for the duration of the call
+ * @param valueSize The size of the value buffer.
+ */
+typedef void (*AIMapper_DumpBufferCallback)(void* _Null_unspecified context,
+                                            AIMapper_MetadataType metadataType,
+                                            const void* _Nonnull value, size_t valueSize);
+
+/**
+ * Callback that is passed to dumpAllBuffers.
+ *
+ * Indicates that a buffer is about to be dumped. Will be followed by N calls to
+ * AIMapper_DumpBufferCallback for all the metadata for this buffer.
+ *
+ * @param context The caller-provided void* that was passed to dumpAllBuffers.
+ */
+typedef void (*AIMapper_BeginDumpBufferCallback)(void* _Null_unspecified context);
+
+/**
+ * Implementation of AIMAPPER_VERSION_5
+ * All functions must not be null & must provide a valid implementation.
+ */
+typedef struct AIMapperV5 {
+    /**
+     * Imports a raw buffer handle to create an imported buffer handle for use
+     * with the rest of the mapper or with other in-process libraries.
+     *
+     * A buffer handle is considered raw when it is cloned (e.g., with
+     * `native_handle_clone()`) from another buffer handle locally, or when it
+     * is received from another HAL server/client or another process. A raw
+     * buffer handle must not be used to access the underlying graphic
+     * buffer. It must be imported to create an imported handle first.
+     *
+     * This function must at least validate the raw handle before creating the
+     * imported handle. It must also support importing the same raw handle
+     * multiple times to create multiple imported handles. The imported handle
+     * must be considered valid everywhere in the process, including in
+     * another instance of the mapper.
+     *
+     * Because of passthrough HALs, a raw buffer handle received from a HAL
+     * may actually have been imported in the process. importBuffer() must treat
+     * such a handle as if it is raw and must not return `BAD_BUFFER`. The
+     * returned handle is independent from the input handle as usual, and
+     * freeBuffer() must be called on it when it is no longer needed.
+     *
+     * @param handle Raw buffer handle to import.
+     * @param outBufferHandle The resulting imported buffer handle.
+     * @return Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the raw handle is invalid.
+     *     - `NO_RESOURCES` if the raw handle cannot be imported due to
+     *       unavailability of resources.
+     */
+    AIMapper_Error (*_Nonnull importBuffer)(const native_handle_t* _Nonnull handle,
+                                            buffer_handle_t _Nullable* _Nonnull outBufferHandle);
+
+    /**
+     * Frees a buffer handle. Buffer handles returned by importBuffer() must be
+     * freed with this function when no longer needed.
+     *
+     * This function must free up all resources allocated by importBuffer() for
+     * the imported handle. For example, if the imported handle was created
+     * with `native_handle_create()`, this function must call
+     * `native_handle_close()` and `native_handle_delete()`.
+     *
+     * @param buffer Imported buffer handle.
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the buffer is invalid.
+     */
+    AIMapper_Error (*_Nonnull freeBuffer)(buffer_handle_t _Nonnull buffer);
+
+    /**
+     * Calculates the transport size of a buffer. An imported buffer handle is a
+     * raw buffer handle with the process-local runtime data appended. This
+     * function, for example, allows a caller to omit the process-local runtime
+     * data at the tail when serializing the imported buffer handle.
+     *
+     * Note that a client might or might not omit the process-local runtime data
+     * when sending an imported buffer handle. The mapper must support both
+     * cases on the receiving end.
+     *
+     * @param buffer Buffer to get the transport size from.
+     * @param outNumFds The number of file descriptors needed for transport.
+     * @param outNumInts The number of integers needed for transport.
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the buffer is invalid.
+     */
+    AIMapper_Error (*_Nonnull getTransportSize)(buffer_handle_t _Nonnull buffer,
+                                                uint32_t* _Nonnull outNumFds,
+                                                uint32_t* _Nonnull outNumInts);
+
+    /**
+     * Locks the given buffer for the specified CPU usage.
+     *
+     * Locking the same buffer simultaneously from multiple threads is
+     * permitted, but if any of the threads attempt to lock the buffer for
+     * writing, the behavior is undefined, except that it must not cause
+     * process termination or block the client indefinitely. Leaving the
+     * buffer content in an indeterminate state or returning an error are both
+     * acceptable.
+     *
+     * 1D buffers (width = size in bytes, height = 1, pixel_format = BLOB) must
+     * "lock in place". The buffers must be directly accessible via mapping.
+     *
+     * The client must not modify the content of the buffer outside of
+     * @p accessRegion, and the device need not guarantee that content outside
+     * of @p accessRegion is valid for reading. The result of reading or writing
+     * outside of @p accessRegion is undefined, except that it must not cause
+     * process termination.
+     *
+     * An accessRegion of all-zeros means the entire buffer. That is, it is
+     * equivalent to '(0,0)-(buffer width, buffer height)'.
+     *
+     * This function can lock both single-planar and multi-planar formats. The caller
+     * should use get() to get information about the buffer they are locking.
+     * get() can be used to get information about the planes, offsets, stride,
+     * etc.
+     *
+     * This function must also work on buffers with
+     * `AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_*` if supported by the device, as well
+     * as with any other formats requested by multimedia codecs when they are
+     * configured with a flexible-YUV-compatible color format.
+     *
+     * On success, @p data must be filled with a pointer to the locked buffer
+     * memory. This address will represent the top-left corner of the entire
+     * buffer, even if @p accessRegion does not begin at the top-left corner.
+     *
+     * The locked buffer must adhere to the format requested at allocation time
+     * in the BufferDescriptorInfo.
+     *
+     * @param buffer Buffer to lock.
+     * @param cpuUsage CPU usage flags to request. See BufferUsage.aidl for possible values.
+     * @param accessRegion Portion of the buffer that the client intends to
+     *     access.
+     * @param acquireFence Handle containing a file descriptor referring to a
+     *     sync fence object, which will be signaled when it is safe for the
+     *     mapper to lock the buffer. @p acquireFence may be an empty fence (-1) if
+     *     it is already safe to lock. Ownership is passed to the callee and it is the
+     *     implementations responsibility to ensure it is closed even when an error
+     *     occurs.
+     * @param outData CPU-accessible pointer to the buffer data.
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the buffer is invalid or is incompatible with this
+     *       function.
+     *     - `BAD_VALUE` if @p cpuUsage is 0, contains non-CPU usage flags, or
+     *       is incompatible with the buffer. Also if the @p accessRegion is
+     *       outside the bounds of the buffer or the accessRegion is invalid.
+     *     - `NO_RESOURCES` if the buffer cannot be locked at this time. Note
+     *       that locking may succeed at a later time.
+     * @return data CPU-accessible pointer to the buffer data.
+     */
+    AIMapper_Error (*_Nonnull lock)(buffer_handle_t _Nonnull buffer, uint64_t cpuUsage,
+                                    ARect accessRegion, int acquireFence,
+                                    void* _Nullable* _Nonnull outData);
+
+    /**
+     * Unlocks a buffer to indicate all CPU accesses to the buffer have
+     * completed.
+     *
+     * @param buffer Buffer to unlock.
+     * @param releaseFence Handle containing a file descriptor referring to a
+     *     sync fence object. The sync fence object will be signaled when the
+     *     mapper has completed any pending work. @p releaseFence may be an
+     *     empty fence (-1).
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the buffer is invalid or not locked.
+     */
+    AIMapper_Error (*_Nonnull unlock)(buffer_handle_t _Nonnull buffer, int* _Nonnull releaseFence);
+
+    /**
+     * Flushes the contents of a locked buffer.
+     *
+     * This function flushes the CPUs caches for the range of all the buffer's
+     * planes and metadata. This should behave similarly to unlock() except the
+     * buffer should remain mapped to the CPU.
+     *
+     * The client is still responsible for calling unlock() when it is done
+     * with all CPU accesses to the buffer.
+     *
+     * If non-CPU blocks are simultaneously writing the buffer, the locked
+     * copy should still be flushed but what happens is undefined except that
+     * it should not cause any crashes.
+     *
+     * @param buffer Buffer to flush.
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the buffer is invalid or not locked.
+     */
+    AIMapper_Error (*_Nonnull flushLockedBuffer)(buffer_handle_t _Nonnull buffer);
+
+    /**
+     * Rereads the contents of a locked buffer.
+     *
+     * This should fetch the most recent copy of the locked buffer.
+     *
+     * It may reread locked copies of the buffer in other processes.
+     *
+     * The client is still responsible for calling unlock() when it is done
+     * with all CPU accesses to the buffer.
+     *
+     * @param buffer Buffer to reread.
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the buffer is invalid or not locked.
+     *     - `NO_RESOURCES` if the buffer cannot be reread at this time. Note
+     *       that rereading may succeed at a later time.
+     */
+    AIMapper_Error (*_Nonnull rereadLockedBuffer)(buffer_handle_t _Nonnull buffer);
+
+    /**
+     * Description for get(...), set(...) and getFromBufferDescriptorInfo(...)
+     *
+     * ------------ Overview -----------------------------------
+     * Gralloc 4 adds support for getting and setting buffer metadata on a buffer.
+     *
+     * To get buffer metadata, the client passes in a buffer handle and a token that
+     * represents the type of buffer metadata they would like to get. IMapper returns
+     * a byte stream that contains the buffer metadata. To set the buffer metadata, the
+     * client passes in a buffer handle and a token that represents the type of buffer
+     * metadata they would like to set and a byte stream that contains the buffer metadata
+     * they are setting.
+     *
+     * Buffer metadata is global for a buffer. When the metadata is set on the buffer
+     * in a process, the updated metadata should be available to all other processes.
+     * Please see "Storing and Propagating Metadata" below for more details.
+     *
+     * The getter and setter functions have been optimized for easy vendor extension.
+     * They do not require a formal extension to add support for getting and setting
+     * vendor defined buffer metadata. See "Buffer Metadata Token" and
+     * "Buffer Metadata Stream" below for more details.
+     *
+     * ------------ Storing and Propagating Metadata -----------
+     * Buffer metadata must be global. Any changes to the metadata must be propagated
+     * to all other processes immediately. Vendors may chose how they would like support
+     * this functionality.
+     *
+     * We recommend supporting this functionality by allocating an extra page of shared
+     * memory and storing it in the buffer's native_handle_t. The buffer metadata can
+     * be stored in the extra page of shared memory. Set operations are automatically
+     * propagated to all other processes.
+     *
+     * ------------ Buffer Metadata Synchronization ------------
+     * There are no explicit buffer metadata synchronization primitives. Many devices
+     * before gralloc 4 already support getting and setting of global buffer metadata
+     * with no explicit synchronization primitives. Adding synchronization primitives
+     * would just add unnecessary complexity.
+     *
+     * The general rule is if a process has permission to write to a buffer, they
+     * have permission to write to the buffer's writable metadata. If a process has permission
+     * to read from a buffer, they have permission to read the buffer's metadata.
+     *
+     * There is one exception to this rule. Fences CANNOT be used to protect a buffer's
+     * metadata. A process should finish writing to a buffer's metadata before
+     * sending the buffer to another process that will read or write to the buffer.
+     * This exception is needed because sometimes userspace needs to read the
+     * buffer's metadata before the buffer's contents are ready.
+     *
+     * As a simple example: an app renders to a buffer and then displays the buffer.
+     * In this example when the app renders to the buffer, both the buffer and its
+     * metadata need to be updated. The app's process queues up its work on the GPU
+     * and gets back an acquire fence. The app's process must update the buffer's
+     * metadata before enqueuing the buffer to SurfaceFlinger. The app process CANNOT
+     * update the buffer's metadata after enqueuing the buffer. When HardwareComposer
+     * receives the buffer, it is immediately safe to read the buffer's metadata
+     * and use it to program the display driver. To read the buffer's contents,
+     * display driver must still wait on the acquire fence.
+     *
+     * ------------ Buffer Metadata Token ----------------------
+     * In order to allow arbitrary vendor defined metadata, the token used to access
+     * metadata is defined defined as a struct that has a string representing
+     * the enum type and an int that represents the enum value. The string protects
+     * different enum values from colliding.
+     *
+     * The token struct (MetadataType) is defined as a C struct since it
+     * is passed into a C function. The standard buffer metadata types are NOT
+     * defined as a C enum but instead as an AIDL enum to allow for broader usage across
+     * other HALs and libraries. By putting the enum in the
+     * stable AIDL (hardware/interfaces/graphics/common/aidl/android/hardware/
+     * graphics/common/StandardMetadataType.aidl), vendors will be able to optionally
+     * choose to support future standard buffer metadata types without upgrading
+     * IMapper versions. For more information see the description of "struct MetadataType".
+     *
+     * ------------ Buffer Metadata Stream ---------------------
+     * The buffer metadata is get and set as a void* buffer. By getting
+     * and setting buffer metadata as a generic buffer, vendors can use the standard
+     * getters and setter functions defined here. Vendors do NOT need to add their own
+     * getters and setter functions for each new type of buffer metadata.
+     *
+     * Converting buffer metadata into a byte stream can be non-trivial. For the standard
+     * buffer metadata types defined in StandardMetadataType.aidl, there are also
+     * support functions that will encode the buffer metadata into a byte stream
+     * and decode the buffer metadata from a byte stream. We STRONGLY recommend using
+     * these support functions. The framework will use them when getting and setting
+     * metadata. The support functions are defined in
+     * frameworks/native/libs/gralloc/types/include/gralloctypes/Gralloc4.h.
+     */
+
+    /**
+     * Gets the buffer metadata for a given MetadataType.
+     *
+     * Buffer metadata can be changed after allocation so clients should avoid "caching"
+     * the buffer metadata. For example, if the video resolution changes and the buffers
+     * are not reallocated, several buffer metadata values may change without warning.
+     * Clients should not expect the values to be constant. They should requery them every
+     * frame. The only exception is buffer metadata that is determined at allocation
+     * time. For StandardMetadataType values, only BUFFER_ID, NAME, WIDTH,
+     * HEIGHT, LAYER_COUNT, PIXEL_FORMAT_REQUESTED and USAGE are safe to cache because
+     * they are determined at allocation time.
+     *
+     * @param buffer Buffer containing desired metadata
+     * @param metadataType MetadataType for the metadata value being queried
+     * @param destBuffer Pointer to a buffer in which to store the result of the get() call; if
+     * null, the computed output size or error must still be returned.
+     * @param destBufferSize How large the destBuffer buffer is. If destBuffer is null this must be
+     * 0.
+     * @return The number of bytes written to `destBuffer` or which would have been written
+     *         if `destBufferSize` was large enough.
+     *         A negative value indicates an error, which may be
+     *         - `BAD_BUFFER` if the raw handle is invalid.
+     *         - `UNSUPPORTED` when metadataType is unknown/unsupported.
+     *            IMapper must support getting all StandardMetadataType.aidl values defined
+     *            at the time the device first launches.
+     */
+    int32_t (*_Nonnull getMetadata)(buffer_handle_t _Nonnull buffer,
+                                    AIMapper_MetadataType metadataType, void* _Nullable destBuffer,
+                                    size_t destBufferSize);
+
+    /**
+     * Gets the buffer metadata for a StandardMetadataType.
+     *
+     * This is equivalent to `getMetadata` when passed an AIMapper_MetadataType with name
+     * set to "android.hardware.graphics.common.StandardMetadataType"
+     *
+     * Buffer metadata can be changed after allocation so clients should avoid "caching"
+     * the buffer metadata. For example, if the video resolution changes and the buffers
+     * are not reallocated, several buffer metadata values may change without warning.
+     * Clients should not expect the values to be constant. They should requery them every
+     * frame. The only exception is buffer metadata that is determined at allocation
+     * time. For StandardMetadataType values, only BUFFER_ID, NAME, WIDTH,
+     * HEIGHT, LAYER_COUNT, PIXEL_FORMAT_REQUESTED and USAGE are safe to cache because
+     * they are determined at allocation time.
+     *
+     * @param buffer Buffer containing desired metadata
+     * @param standardMetadataType StandardMetadataType for the metadata value being queried
+     * @param destBuffer Pointer to a buffer in which to store the result of the get() call; if
+     * null, the computed output size or error must still be returned.
+     * @param destBufferSize How large the destBuffer buffer is. If destBuffer is null this must be
+     * 0.
+     * @return The number of bytes written to `destBuffer` or which would have been written
+     *         if `destBufferSize` was large enough.
+     *         A negative value indicates an error, which may be
+     *         - `BAD_BUFFER` if the raw handle is invalid.
+     *         - `UNSUPPORTED` when metadataType is unknown/unsupported.
+     *            IMapper must support getting all StandardMetadataType.aidl values defined
+     *            at the time the device first launches.
+     */
+    int32_t (*_Nonnull getStandardMetadata)(buffer_handle_t _Nonnull buffer,
+                                            int64_t standardMetadataType,
+                                            void* _Nullable destBuffer, size_t destBufferSize);
+
+    /**
+     * Sets the global value for a given MetadataType.
+     *
+     * Metadata fields are not required to be settable. This function can
+     * return Error::UNSUPPORTED whenever it doesn't support setting a
+     * particular Metadata field.
+     *
+     * The framework will attempt to set the following StandardMetadataType
+     * values: DATASPACE, SMPTE2086, CTA861_3, SMPTE2094_40 and BLEND_MODE.
+     * We require everyone to support setting those fields. If a device's Composer
+     * implementation supports a field, it should be supported here. Over time these
+     * metadata fields will be moved out of Composer/BufferQueue/etc. and into the
+     * buffer's Metadata fields.
+     *
+     * @param buffer Buffer receiving desired metadata
+     * @param metadataType MetadataType for the metadata value being set
+     * @param metadata Pointer to a buffer of bytes representing the value associated with
+     * @param metadataSize The size of the metadata buffer
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the raw handle is invalid.
+     *     - `BAD_VALUE` when the field is constant and can never be set (such as
+     *       BUFFER_ID, NAME, WIDTH, HEIGHT, LAYER_COUNT, PIXEL_FORMAT_REQUESTED and
+     *       USAGE)
+     *     - `NO_RESOURCES` if the set cannot be fulfilled due to unavailability of
+     *        resources.
+     *     - `UNSUPPORTED` when metadataType is unknown/unsupported or setting
+     *       it is unsupported. Unsupported should also be returned if the metadata
+     *       is malformed.
+     */
+    AIMapper_Error (*_Nonnull setMetadata)(buffer_handle_t _Nonnull buffer,
+                                           AIMapper_MetadataType metadataType,
+                                           const void* _Nonnull metadata, size_t metadataSize);
+
+    /**
+     * Sets the global value for a given MetadataType.
+     *
+     * This is equivalent to `setMetadata` when passed an AIMapper_MetadataType with name
+     * set to "android.hardware.graphics.common.StandardMetadataType"
+     *
+     * Metadata fields are not required to be settable. This function can
+     * return Error::UNSUPPORTED whenever it doesn't support setting a
+     * particular Metadata field.
+     *
+     * The framework will attempt to set the following StandardMetadataType
+     * values: DATASPACE, SMPTE2086, CTA861_3, SMPTE2094_40 and BLEND_MODE.
+     * We require everyone to support setting those fields. If a device's Composer
+     * implementation supports a field, it should be supported here. Over time these
+     * metadata fields will be moved out of Composer/BufferQueue/etc. and into the
+     * buffer's Metadata fields.
+     *
+     * @param buffer Buffer receiving desired metadata
+     * @param standardMetadataType StandardMetadataType for the metadata value being set
+     * @param metadata Pointer to a buffer of bytes representing the value associated with
+     * @param metadataSize The size of the metadata buffer
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the raw handle is invalid.
+     *     - `BAD_VALUE` when the field is constant and can never be set (such as
+     *       BUFFER_ID, NAME, WIDTH, HEIGHT, LAYER_COUNT, PIXEL_FORMAT_REQUESTED and
+     *       USAGE)
+     *     - `NO_RESOURCES` if the set cannot be fulfilled due to unavailability of
+     *        resources.
+     *     - `UNSUPPORTED` when metadataType is unknown/unsupported or setting
+     *       it is unsupported. Unsupported should also be returned if the metadata
+     *       is malformed.
+     */
+    AIMapper_Error (*_Nonnull setStandardMetadata)(buffer_handle_t _Nonnull buffer,
+                                                   int64_t standardMetadataType,
+                                                   const void* _Nonnull metadata,
+                                                   size_t metadataSize);
+
+    /**
+     * Lists all the MetadataTypes supported by IMapper as well as a description
+     * of each supported MetadataType. For StandardMetadataTypes, the description
+     * string can be left empty.
+     *
+     * This list is expected to be static & thus the returned array must be valid for the
+     * lifetime of the process.
+     *
+     * @param outDescriptionList The list of descriptions
+     * @param outNumberOfDescriptions How many descriptions are in `outDescriptionList`
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `UNSUPPORTED` if there's any error
+     */
+    AIMapper_Error (*_Nonnull listSupportedMetadataTypes)(
+            const AIMapper_MetadataTypeDescription* _Nullable* _Nonnull outDescriptionList,
+            size_t* _Nonnull outNumberOfDescriptions);
+
+    /**
+     * Dumps a buffer's metadata.
+     *
+     * @param buffer The buffer to dump the metadata for
+     * @param dumpBufferCallback Callback that will be invoked for each of the metadata fields
+     * @param context A caller-provided context to be passed to the dumpBufferCallback
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the raw handle is invalid.
+     *     - `NO_RESOURCES` if the get cannot be fulfilled due to unavailability of
+     *       resources.
+     */
+    AIMapper_Error (*_Nonnull dumpBuffer)(buffer_handle_t _Nonnull buffer,
+                                          AIMapper_DumpBufferCallback _Nonnull dumpBufferCallback,
+                                          void* _Null_unspecified context);
+
+    /**
+     * Dump the metadata for all imported buffers in the current process
+     *
+     * The HAL implementation should invoke beginDumpCallback before dumping a buffer's metadata,
+     * followed by N calls to dumpBufferCallback for that buffer's metadata fields. The call
+     * sequence should follow this pseudocode:
+     *
+     * for (auto buffer : gListOfImportedBuffers) {
+     *    beginDumpCallback(context);
+     *    for (auto metadata : buffer->allMetadata()) {
+     *        dumpBufferCallback(context, metadata...);
+     *    }
+     * }
+     *
+     * @param beginDumpCallback Signals that a buffer is about to be dumped
+     * @param dumpBufferCallback Callback that will be invoked for each of the metadata fields
+     * @param context A caller-provided context to be passed to beginDumpCallback and
+     *                dumpBufferCallback
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the raw handle is invalid.
+     *     - `NO_RESOURCES` if the get cannot be fulfilled due to unavailability of
+     *       resources.
+     */
+    AIMapper_Error (*_Nonnull dumpAllBuffers)(
+            AIMapper_BeginDumpBufferCallback _Nonnull beginDumpCallback,
+            AIMapper_DumpBufferCallback _Nonnull dumpBufferCallback,
+            void* _Null_unspecified context);
+
+    /**
+     * Returns the region of shared memory associated with the buffer that is
+     * reserved for client use.
+     *
+     * The shared memory may be allocated from any shared memory allocator.
+     * The shared memory must be CPU-accessible and virtually contiguous. The
+     * starting address must be word-aligned.
+     *
+     * This function may only be called after importBuffer() has been called by the
+     * client. The reserved region must remain accessible until freeBuffer() has
+     * been called. After freeBuffer() has been called, the client must not access
+     * the reserved region.
+     *
+     * This reserved memory may be used in future versions of Android to
+     * help clients implement backwards compatible features without requiring
+     * IAllocator/IMapper updates.
+     *
+     * @param buffer Imported buffer handle.
+     * @param outReservedRegion CPU-accessible pointer to the reserved region
+     * @param outReservedSize the size of the reservedRegion that was requested
+     *    in the BufferDescriptorInfo.
+     * @return error Error status of the call, which may be
+     *     - `NONE` upon success.
+     *     - `BAD_BUFFER` if the buffer is invalid.
+     */
+    AIMapper_Error (*_Nonnull getReservedRegion)(buffer_handle_t _Nonnull buffer,
+                                                 void* _Nullable* _Nonnull outReservedRegion,
+                                                 uint64_t* _Nonnull outReservedSize);
+
+} AIMapperV5;
+
+/**
+ * Return value for AIMapper_loadIMapper
+ *
+ * Note: This struct's size is not fixed and callers must never store it by-value as a result.
+ *       Only fields up to those covered by `version` are allowed to be accessed.
+ */
+typedef struct AIMapper {
+    alignas(alignof(max_align_t)) AIMapper_Version version;
+    AIMapperV5 v5;
+} AIMapper;
+
+/**
+ * Loads the vendor-provided implementation of AIMapper
+ * @return Error status of the call.
+ *          - `NONE` upon success
+ *          - `UNSUPPORTED` if no implementation is available
+ */
+AIMapper_Error AIMapper_loadIMapper(AIMapper* _Nullable* _Nonnull outImplementation);
+
+__END_DECLS
\ No newline at end of file
diff --git a/graphics/mapper/stable-c/vts/VtsHalGraphicsMapperStableC_TargetTest.cpp b/graphics/mapper/stable-c/vts/VtsHalGraphicsMapperStableC_TargetTest.cpp
new file mode 100644
index 0000000..6ab11a3
--- /dev/null
+++ b/graphics/mapper/stable-c/vts/VtsHalGraphicsMapperStableC_TargetTest.cpp
@@ -0,0 +1,1565 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "VtsHalGraphicsMapperStableC_TargetTest"
+
+#include <aidl/Vintf.h>
+#include <aidl/android/hardware/graphics/allocator/AllocationError.h>
+#include <aidl/android/hardware/graphics/allocator/AllocationResult.h>
+#include <aidl/android/hardware/graphics/allocator/IAllocator.h>
+#include <aidl/android/hardware/graphics/common/BufferUsage.h>
+#include <aidl/android/hardware/graphics/common/PixelFormat.h>
+#include <aidlcommonsupport/NativeHandle.h>
+#include <android/binder_manager.h>
+#include <android/dlext.h>
+#include <android/hardware/graphics/mapper/IMapper.h>
+#include <android/hardware/graphics/mapper/utils/IMapperMetadataTypes.h>
+#include <gralloctypes/Gralloc4.h>
+#include <hidl/GtestPrinter.h>
+#include <system/graphics.h>
+
+#include <dlfcn.h>
+#include <drm/drm_fourcc.h>
+#include <gtest/gtest.h>
+#include <vndksupport/linker.h>
+#include <initializer_list>
+#include <optional>
+#include <string>
+#include <tuple>
+#include <vector>
+
+using namespace aidl::android::hardware::graphics::allocator;
+using namespace aidl::android::hardware::graphics::common;
+using namespace android;
+using namespace android::hardware;
+using namespace ::android::hardware::graphics::mapper;
+
+typedef AIMapper_Error (*AIMapper_loadIMapperFn)(AIMapper* _Nullable* _Nonnull outImplementation);
+
+inline constexpr BufferUsage operator|(BufferUsage lhs, BufferUsage rhs) {
+    using T = std::underlying_type_t<BufferUsage>;
+    return static_cast<BufferUsage>(static_cast<T>(lhs) | static_cast<T>(rhs));
+}
+
+inline BufferUsage& operator|=(BufferUsage& lhs, BufferUsage rhs) {
+    lhs = lhs | rhs;
+    return lhs;
+}
+
+struct YCbCr {
+    android_ycbcr yCbCr;
+    int64_t horizontalSubSampling;
+    int64_t verticalSubSampling;
+};
+
+class BufferHandle {
+    AIMapper* mIMapper;
+    buffer_handle_t mHandle = nullptr;
+
+  public:
+    explicit BufferHandle(AIMapper* mapper, native_handle_t* rawHandle) : mIMapper(mapper) {
+        EXPECT_EQ(AIMAPPER_ERROR_NONE, mIMapper->v5.importBuffer(rawHandle, &mHandle));
+    }
+
+    explicit BufferHandle(BufferHandle&& other) { *this = std::move(other); }
+
+    BufferHandle& operator=(BufferHandle&& other) noexcept {
+        reset();
+        mIMapper = other.mIMapper;
+        mHandle = other.mHandle;
+        other.mHandle = nullptr;
+        return *this;
+    }
+
+    ~BufferHandle() { reset(); }
+
+    constexpr explicit operator bool() const noexcept { return mHandle != nullptr; }
+
+    buffer_handle_t operator*() const noexcept { return mHandle; }
+
+    void reset() {
+        if (mHandle != nullptr) {
+            EXPECT_EQ(AIMAPPER_ERROR_NONE, mIMapper->v5.freeBuffer(mHandle));
+            mHandle = nullptr;
+        }
+    }
+};
+
+class BufferAllocation {
+    AIMapper* mIMapper;
+    native_handle_t* mRawHandle;
+    uint32_t mStride;
+    const BufferDescriptorInfo mInfo;
+
+  public:
+    BufferAllocation(const BufferAllocation&) = delete;
+    void operator=(const BufferAllocation&) = delete;
+
+    BufferAllocation(AIMapper* mapper, native_handle_t* handle, uint32_t stride,
+                     const BufferDescriptorInfo& info)
+        : mIMapper(mapper), mRawHandle(handle), mStride(stride), mInfo(info) {}
+
+    ~BufferAllocation() {
+        if (mRawHandle == nullptr) return;
+
+        native_handle_close(mRawHandle);
+        native_handle_delete(mRawHandle);
+    }
+
+    uint32_t stride() const { return mStride; }
+    const BufferDescriptorInfo& info() const { return mInfo; }
+
+    BufferHandle import() { return BufferHandle{mIMapper, mRawHandle}; }
+
+    const native_handle_t* rawHandle() const { return mRawHandle; }
+};
+
+class GraphicsTestsBase {
+  private:
+    friend class BufferAllocation;
+    int32_t mIAllocatorVersion = 1;
+    std::shared_ptr<IAllocator> mAllocator;
+    AIMapper* mIMapper = nullptr;
+    AIMapper_loadIMapperFn mIMapperLoader;
+
+  protected:
+    void Initialize(std::shared_ptr<IAllocator> allocator) {
+        mAllocator = allocator;
+        ASSERT_NE(nullptr, mAllocator.get()) << "failed to get allocator service";
+        ASSERT_TRUE(mAllocator->getInterfaceVersion(&mIAllocatorVersion).isOk());
+        ASSERT_GE(mIAllocatorVersion, 2);
+        std::string mapperSuffix;
+        auto status = mAllocator->getIMapperLibrarySuffix(&mapperSuffix);
+        ASSERT_TRUE(status.isOk()) << "Failed to get IMapper library suffix";
+        std::string lib_name = "mapper." + mapperSuffix + ".so";
+        void* so = android_load_sphal_library(lib_name.c_str(), RTLD_LOCAL | RTLD_NOW);
+        ASSERT_NE(nullptr, so) << "Failed to load " << lib_name;
+        mIMapperLoader = (AIMapper_loadIMapperFn)dlsym(so, "AIMapper_loadIMapper");
+        ASSERT_NE(nullptr, mIMapperLoader) << "AIMapper_locaIMapper missing from " << lib_name;
+        ASSERT_EQ(AIMAPPER_ERROR_NONE, mIMapperLoader(&mIMapper));
+        ASSERT_NE(mIMapper, nullptr);
+    }
+
+  public:
+    AIMapper_loadIMapperFn getIMapperLoader() const { return mIMapperLoader; }
+
+    std::unique_ptr<BufferAllocation> allocate(const BufferDescriptorInfo& descriptorInfo) {
+        AllocationResult result;
+        ::ndk::ScopedAStatus status = mAllocator->allocate2(descriptorInfo, 1, &result);
+        if (!status.isOk()) {
+            status_t error = status.getExceptionCode();
+            if (error == EX_SERVICE_SPECIFIC) {
+                error = status.getServiceSpecificError();
+                EXPECT_NE(OK, error) << "Failed to set error properly";
+            } else {
+                EXPECT_EQ(OK, error) << "Allocation transport failure";
+            }
+            return nullptr;
+        } else {
+            return std::make_unique<BufferAllocation>(mIMapper, dupFromAidl(result.buffers[0]),
+                                                      result.stride, descriptorInfo);
+        }
+    }
+
+    std::unique_ptr<BufferAllocation> allocateGeneric() {
+        return allocate({
+                .name = {"VTS_TEMP"},
+                .width = 64,
+                .height = 64,
+                .layerCount = 1,
+                .format = PixelFormat::RGBA_8888,
+                .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+                .reservedSize = 0,
+        });
+    }
+
+    bool isSupported(const BufferDescriptorInfo& descriptorInfo) {
+        bool ret = false;
+        EXPECT_TRUE(mAllocator->isSupported(descriptorInfo, &ret).isOk());
+        return ret;
+    }
+
+    AIMapper* mapper() const { return mIMapper; }
+
+    template <StandardMetadataType T>
+    auto getStandardMetadata(buffer_handle_t bufferHandle)
+            -> decltype(StandardMetadata<T>::value::decode(nullptr, 0)) {
+        using Value = typename StandardMetadata<T>::value;
+        std::vector<uint8_t> buffer;
+        // Initial guess
+        buffer.resize(512);
+        int32_t sizeRequired = mapper()->v5.getStandardMetadata(
+                bufferHandle, static_cast<int64_t>(T), buffer.data(), buffer.size());
+        if (sizeRequired < 0) {
+            EXPECT_EQ(-AIMAPPER_ERROR_UNSUPPORTED, sizeRequired)
+                    << "Received something other than UNSUPPORTED from valid getStandardMetadata "
+                       "call";
+            return std::nullopt;
+        }
+        if (sizeRequired > buffer.size()) {
+            buffer.resize(sizeRequired);
+            sizeRequired = mapper()->v5.getStandardMetadata(bufferHandle, static_cast<int64_t>(T),
+                                                            buffer.data(), buffer.size());
+        }
+        if (sizeRequired < 0 || sizeRequired >= buffer.size()) {
+            ADD_FAILURE() << "getStandardMetadata failed, received " << sizeRequired
+                          << " with buffer size " << buffer.size();
+            // Generate a fail type
+            return std::nullopt;
+        }
+        return Value::decode(buffer.data(), sizeRequired);
+    }
+
+    template <StandardMetadataType T>
+    AIMapper_Error setStandardMetadata(buffer_handle_t bufferHandle,
+                                       const typename StandardMetadata<T>::value_type& value) {
+        using Value = typename StandardMetadata<T>::value;
+        int32_t sizeRequired = Value::encode(value, nullptr, 0);
+        if (sizeRequired < 0) {
+            EXPECT_GE(sizeRequired, 0) << "Failed to calculate required size";
+            return static_cast<AIMapper_Error>(-sizeRequired);
+        }
+        std::vector<uint8_t> buffer;
+        buffer.resize(sizeRequired);
+        sizeRequired = Value::encode(value, buffer.data(), buffer.size());
+        if (sizeRequired < 0 || sizeRequired > buffer.size()) {
+            ADD_FAILURE() << "Failed to encode with calculated size " << sizeRequired
+                          << "; buffer size" << buffer.size();
+            return static_cast<AIMapper_Error>(-sizeRequired);
+        }
+        return mapper()->v5.setStandardMetadata(bufferHandle, static_cast<int64_t>(T),
+                                                buffer.data(), sizeRequired);
+    }
+
+    void verifyRGBA8888PlaneLayouts(const std::vector<PlaneLayout>& planeLayouts) {
+        ASSERT_EQ(1, planeLayouts.size());
+
+        const auto& planeLayout = planeLayouts.front();
+
+        ASSERT_EQ(4, planeLayout.components.size());
+
+        int64_t offsetInBitsR = -1;
+        int64_t offsetInBitsG = -1;
+        int64_t offsetInBitsB = -1;
+        int64_t offsetInBitsA = -1;
+
+        for (const auto& component : planeLayout.components) {
+            if (!gralloc4::isStandardPlaneLayoutComponentType(component.type)) {
+                continue;
+            }
+            EXPECT_EQ(8, component.sizeInBits);
+            if (component.type.value == gralloc4::PlaneLayoutComponentType_R.value) {
+                offsetInBitsR = component.offsetInBits;
+            }
+            if (component.type.value == gralloc4::PlaneLayoutComponentType_G.value) {
+                offsetInBitsG = component.offsetInBits;
+            }
+            if (component.type.value == gralloc4::PlaneLayoutComponentType_B.value) {
+                offsetInBitsB = component.offsetInBits;
+            }
+            if (component.type.value == gralloc4::PlaneLayoutComponentType_A.value) {
+                offsetInBitsA = component.offsetInBits;
+            }
+        }
+
+        EXPECT_EQ(0, offsetInBitsR);
+        EXPECT_EQ(8, offsetInBitsG);
+        EXPECT_EQ(16, offsetInBitsB);
+        EXPECT_EQ(24, offsetInBitsA);
+
+        EXPECT_EQ(0, planeLayout.offsetInBytes);
+        EXPECT_EQ(32, planeLayout.sampleIncrementInBits);
+        // Skip testing stride because any stride is valid
+        EXPECT_LE(planeLayout.widthInSamples * planeLayout.heightInSamples * 4,
+                  planeLayout.totalSizeInBytes);
+        EXPECT_EQ(1, planeLayout.horizontalSubsampling);
+        EXPECT_EQ(1, planeLayout.verticalSubsampling);
+    }
+
+    void fillRGBA8888(uint8_t* data, uint32_t height, size_t strideInBytes, size_t widthInBytes) {
+        for (uint32_t y = 0; y < height; y++) {
+            memset(data, y, widthInBytes);
+            data += strideInBytes;
+        }
+    }
+
+    void verifyRGBA8888(const buffer_handle_t bufferHandle, const uint8_t* data, uint32_t height,
+                        size_t strideInBytes, size_t widthInBytes) {
+        auto decodeResult = getStandardMetadata<StandardMetadataType::PLANE_LAYOUTS>(bufferHandle);
+        ASSERT_TRUE(decodeResult.has_value());
+        const auto& planeLayouts = *decodeResult;
+        ASSERT_TRUE(planeLayouts.size() > 0);
+
+        verifyRGBA8888PlaneLayouts(planeLayouts);
+
+        for (uint32_t y = 0; y < height; y++) {
+            for (size_t i = 0; i < widthInBytes; i++) {
+                EXPECT_EQ(static_cast<uint8_t>(y), data[i]);
+            }
+            data += strideInBytes;
+        }
+    }
+
+    void traverseYCbCrData(const android_ycbcr& yCbCr, int32_t width, int32_t height,
+                           int64_t hSubsampling, int64_t vSubsampling,
+                           std::function<void(uint8_t*, uint8_t)> traverseFuncion) {
+        auto yData = static_cast<uint8_t*>(yCbCr.y);
+        auto cbData = static_cast<uint8_t*>(yCbCr.cb);
+        auto crData = static_cast<uint8_t*>(yCbCr.cr);
+        auto yStride = yCbCr.ystride;
+        auto cStride = yCbCr.cstride;
+        auto chromaStep = yCbCr.chroma_step;
+
+        for (uint32_t y = 0; y < height; y++) {
+            for (uint32_t x = 0; x < width; x++) {
+                auto val = static_cast<uint8_t>(height * y + x);
+
+                traverseFuncion(yData + yStride * y + x, val);
+
+                if (y % vSubsampling == 0 && x % hSubsampling == 0) {
+                    uint32_t subSampleX = x / hSubsampling;
+                    uint32_t subSampleY = y / vSubsampling;
+                    const auto subSampleOffset = cStride * subSampleY + chromaStep * subSampleX;
+                    const auto subSampleVal =
+                            static_cast<uint8_t>(height * subSampleY + subSampleX);
+
+                    traverseFuncion(cbData + subSampleOffset, subSampleVal);
+                    traverseFuncion(crData + subSampleOffset, subSampleVal + 1);
+                }
+            }
+        }
+    }
+
+    void fillYCbCrData(const android_ycbcr& yCbCr, int32_t width, int32_t height,
+                       int64_t hSubsampling, int64_t vSubsampling) {
+        traverseYCbCrData(yCbCr, width, height, hSubsampling, vSubsampling,
+                          [](auto address, auto fillingData) { *address = fillingData; });
+    }
+
+    void verifyYCbCrData(const android_ycbcr& yCbCr, int32_t width, int32_t height,
+                         int64_t hSubsampling, int64_t vSubsampling) {
+        traverseYCbCrData(
+                yCbCr, width, height, hSubsampling, vSubsampling,
+                [](auto address, auto expectedData) { EXPECT_EQ(*address, expectedData); });
+    }
+
+    constexpr uint64_t bitsToBytes(int64_t bits) { return bits / 8; }
+    constexpr uint64_t bytesToBits(int64_t bytes) { return bytes * 8; }
+
+    void getAndroidYCbCr(buffer_handle_t bufferHandle, uint8_t* data, android_ycbcr* outYCbCr,
+                         int64_t* hSubsampling, int64_t* vSubsampling) {
+        auto decodeResult = getStandardMetadata<StandardMetadataType::PLANE_LAYOUTS>(bufferHandle);
+        ASSERT_TRUE(decodeResult.has_value());
+        const auto& planeLayouts = *decodeResult;
+        ASSERT_TRUE(planeLayouts.size() > 0);
+
+        outYCbCr->y = nullptr;
+        outYCbCr->cb = nullptr;
+        outYCbCr->cr = nullptr;
+        outYCbCr->ystride = 0;
+        outYCbCr->cstride = 0;
+        outYCbCr->chroma_step = 0;
+
+        for (const auto& planeLayout : planeLayouts) {
+            for (const auto& planeLayoutComponent : planeLayout.components) {
+                if (!gralloc4::isStandardPlaneLayoutComponentType(planeLayoutComponent.type)) {
+                    continue;
+                }
+                ASSERT_EQ(0, planeLayoutComponent.offsetInBits % 8);
+
+                uint8_t* tmpData = data + planeLayout.offsetInBytes +
+                                   bitsToBytes(planeLayoutComponent.offsetInBits);
+                uint64_t sampleIncrementInBytes;
+
+                auto type = static_cast<PlaneLayoutComponentType>(planeLayoutComponent.type.value);
+                switch (type) {
+                    case PlaneLayoutComponentType::Y:
+                        ASSERT_EQ(nullptr, outYCbCr->y);
+                        ASSERT_EQ(8, planeLayoutComponent.sizeInBits);
+                        ASSERT_EQ(8, planeLayout.sampleIncrementInBits);
+                        outYCbCr->y = tmpData;
+                        outYCbCr->ystride = planeLayout.strideInBytes;
+                        break;
+
+                    case PlaneLayoutComponentType::CB:
+                    case PlaneLayoutComponentType::CR:
+                        ASSERT_EQ(0, planeLayout.sampleIncrementInBits % 8);
+
+                        sampleIncrementInBytes = planeLayout.sampleIncrementInBits / 8;
+                        ASSERT_TRUE(sampleIncrementInBytes == 1 || sampleIncrementInBytes == 2);
+
+                        if (outYCbCr->cstride == 0 && outYCbCr->chroma_step == 0) {
+                            outYCbCr->cstride = planeLayout.strideInBytes;
+                            outYCbCr->chroma_step = sampleIncrementInBytes;
+                        } else {
+                            ASSERT_EQ(outYCbCr->cstride, planeLayout.strideInBytes);
+                            ASSERT_EQ(outYCbCr->chroma_step, sampleIncrementInBytes);
+                        }
+
+                        if (*hSubsampling == 0 && *vSubsampling == 0) {
+                            *hSubsampling = planeLayout.horizontalSubsampling;
+                            *vSubsampling = planeLayout.verticalSubsampling;
+                        } else {
+                            ASSERT_EQ(*hSubsampling, planeLayout.horizontalSubsampling);
+                            ASSERT_EQ(*vSubsampling, planeLayout.verticalSubsampling);
+                        }
+
+                        if (type == PlaneLayoutComponentType::CB) {
+                            ASSERT_EQ(nullptr, outYCbCr->cb);
+                            outYCbCr->cb = tmpData;
+                        } else {
+                            ASSERT_EQ(nullptr, outYCbCr->cr);
+                            outYCbCr->cr = tmpData;
+                        }
+                        break;
+                    default:
+                        break;
+                };
+            }
+        }
+
+        ASSERT_NE(nullptr, outYCbCr->y);
+        ASSERT_NE(nullptr, outYCbCr->cb);
+        ASSERT_NE(nullptr, outYCbCr->cr);
+    }
+
+    YCbCr getAndroidYCbCr_P010(const native_handle_t* bufferHandle, uint8_t* data) {
+        YCbCr yCbCr_P010;
+        auto decodeResult = getStandardMetadata<StandardMetadataType::PLANE_LAYOUTS>(bufferHandle);
+        if (!decodeResult.has_value()) {
+            ADD_FAILURE() << "failed to get plane layout";
+            return YCbCr{};
+        }
+        const auto& planeLayouts = *decodeResult;
+        EXPECT_EQ(2, planeLayouts.size());
+        EXPECT_EQ(1, planeLayouts[0].components.size());
+        EXPECT_EQ(2, planeLayouts[1].components.size());
+
+        yCbCr_P010.yCbCr.y = nullptr;
+        yCbCr_P010.yCbCr.cb = nullptr;
+        yCbCr_P010.yCbCr.cr = nullptr;
+        yCbCr_P010.yCbCr.ystride = 0;
+        yCbCr_P010.yCbCr.cstride = 0;
+        yCbCr_P010.yCbCr.chroma_step = 0;
+        int64_t cb_offset = 0;
+        int64_t cr_offset = 0;
+
+        for (const auto& planeLayout : planeLayouts) {
+            for (const auto& planeLayoutComponent : planeLayout.components) {
+                if (!gralloc4::isStandardPlaneLayoutComponentType(planeLayoutComponent.type)) {
+                    continue;
+                }
+
+                uint8_t* tmpData = data + planeLayout.offsetInBytes +
+                                   bitsToBytes(planeLayoutComponent.offsetInBits);
+                uint64_t sampleIncrementInBytes = 0;
+                auto type = static_cast<PlaneLayoutComponentType>(planeLayoutComponent.type.value);
+                switch (type) {
+                    case PlaneLayoutComponentType::Y:
+                        // For specs refer:
+                        // https://docs.microsoft.com/en-us/windows/win32/medfound/10-bit-and-16-bit-yuv-video-formats
+                        EXPECT_EQ(6, planeLayoutComponent.offsetInBits);
+                        EXPECT_EQ(nullptr, yCbCr_P010.yCbCr.y);
+                        EXPECT_EQ(10, planeLayoutComponent.sizeInBits);
+                        EXPECT_EQ(16, planeLayout.sampleIncrementInBits);
+
+                        yCbCr_P010.yCbCr.y = tmpData;
+                        yCbCr_P010.yCbCr.ystride = planeLayout.strideInBytes;
+                        break;
+
+                    case PlaneLayoutComponentType::CB:
+                    case PlaneLayoutComponentType::CR:
+                        sampleIncrementInBytes = bitsToBytes(planeLayout.sampleIncrementInBits);
+                        EXPECT_EQ(4, sampleIncrementInBytes);
+
+                        if (yCbCr_P010.yCbCr.cstride == 0 && yCbCr_P010.yCbCr.chroma_step == 0) {
+                            yCbCr_P010.yCbCr.cstride = planeLayout.strideInBytes;
+                            yCbCr_P010.yCbCr.chroma_step = sampleIncrementInBytes;
+                        } else {
+                            EXPECT_EQ(yCbCr_P010.yCbCr.cstride, planeLayout.strideInBytes);
+                            EXPECT_EQ(yCbCr_P010.yCbCr.chroma_step, sampleIncrementInBytes);
+                        }
+
+                        if (yCbCr_P010.horizontalSubSampling == 0 &&
+                            yCbCr_P010.verticalSubSampling == 0) {
+                            yCbCr_P010.horizontalSubSampling = planeLayout.horizontalSubsampling;
+                            yCbCr_P010.verticalSubSampling = planeLayout.verticalSubsampling;
+                        } else {
+                            EXPECT_EQ(yCbCr_P010.horizontalSubSampling,
+                                      planeLayout.horizontalSubsampling);
+                            EXPECT_EQ(yCbCr_P010.verticalSubSampling,
+                                      planeLayout.verticalSubsampling);
+                        }
+
+                        if (type == PlaneLayoutComponentType::CB) {
+                            EXPECT_EQ(nullptr, yCbCr_P010.yCbCr.cb);
+                            yCbCr_P010.yCbCr.cb = tmpData;
+                            cb_offset = planeLayoutComponent.offsetInBits;
+                        } else {
+                            EXPECT_EQ(nullptr, yCbCr_P010.yCbCr.cr);
+                            yCbCr_P010.yCbCr.cr = tmpData;
+                            cr_offset = planeLayoutComponent.offsetInBits;
+                        }
+                        break;
+                    default:
+                        break;
+                };
+            }
+        }
+
+        EXPECT_EQ(cb_offset + bytesToBits(2), cr_offset);
+        EXPECT_NE(nullptr, yCbCr_P010.yCbCr.y);
+        EXPECT_NE(nullptr, yCbCr_P010.yCbCr.cb);
+        EXPECT_NE(nullptr, yCbCr_P010.yCbCr.cr);
+        return yCbCr_P010;
+    }
+};
+
+class GraphicsMapperStableCTests
+    : public GraphicsTestsBase,
+      public ::testing::TestWithParam<std::tuple<std::string, std::shared_ptr<IAllocator>>> {
+  public:
+    void SetUp() override { Initialize(std::get<1>(GetParam())); }
+
+    void TearDown() override {}
+};
+
+TEST_P(GraphicsMapperStableCTests, AllV5CallbacksDefined) {
+    ASSERT_GE(mapper()->version, AIMAPPER_VERSION_5);
+
+    EXPECT_TRUE(mapper()->v5.importBuffer);
+    EXPECT_TRUE(mapper()->v5.freeBuffer);
+    EXPECT_TRUE(mapper()->v5.getTransportSize);
+    EXPECT_TRUE(mapper()->v5.lock);
+    EXPECT_TRUE(mapper()->v5.unlock);
+    EXPECT_TRUE(mapper()->v5.flushLockedBuffer);
+    EXPECT_TRUE(mapper()->v5.rereadLockedBuffer);
+    EXPECT_TRUE(mapper()->v5.getMetadata);
+    EXPECT_TRUE(mapper()->v5.getStandardMetadata);
+    EXPECT_TRUE(mapper()->v5.setMetadata);
+    EXPECT_TRUE(mapper()->v5.setStandardMetadata);
+    EXPECT_TRUE(mapper()->v5.listSupportedMetadataTypes);
+    EXPECT_TRUE(mapper()->v5.dumpBuffer);
+    EXPECT_TRUE(mapper()->v5.getReservedRegion);
+}
+
+TEST_P(GraphicsMapperStableCTests, DualLoadIsIdentical) {
+    ASSERT_GE(mapper()->version, AIMAPPER_VERSION_5);
+    AIMapper* secondMapper;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, getIMapperLoader()(&secondMapper));
+
+    EXPECT_EQ(secondMapper->v5.importBuffer, mapper()->v5.importBuffer);
+    EXPECT_EQ(secondMapper->v5.freeBuffer, mapper()->v5.freeBuffer);
+    EXPECT_EQ(secondMapper->v5.getTransportSize, mapper()->v5.getTransportSize);
+    EXPECT_EQ(secondMapper->v5.lock, mapper()->v5.lock);
+    EXPECT_EQ(secondMapper->v5.unlock, mapper()->v5.unlock);
+    EXPECT_EQ(secondMapper->v5.flushLockedBuffer, mapper()->v5.flushLockedBuffer);
+    EXPECT_EQ(secondMapper->v5.rereadLockedBuffer, mapper()->v5.rereadLockedBuffer);
+    EXPECT_EQ(secondMapper->v5.getMetadata, mapper()->v5.getMetadata);
+    EXPECT_EQ(secondMapper->v5.getStandardMetadata, mapper()->v5.getStandardMetadata);
+    EXPECT_EQ(secondMapper->v5.setMetadata, mapper()->v5.setMetadata);
+    EXPECT_EQ(secondMapper->v5.setStandardMetadata, mapper()->v5.setStandardMetadata);
+    EXPECT_EQ(secondMapper->v5.listSupportedMetadataTypes, mapper()->v5.listSupportedMetadataTypes);
+    EXPECT_EQ(secondMapper->v5.dumpBuffer, mapper()->v5.dumpBuffer);
+    EXPECT_EQ(secondMapper->v5.getReservedRegion, mapper()->v5.getReservedRegion);
+}
+
+TEST_P(GraphicsMapperStableCTests, CanAllocate) {
+    auto buffer = allocate({
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    });
+    ASSERT_NE(nullptr, buffer.get());
+    EXPECT_GE(buffer->stride(), 64);
+}
+
+TEST_P(GraphicsMapperStableCTests, ImportFreeBuffer) {
+    auto buffer = allocate({
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    });
+    ASSERT_NE(nullptr, buffer.get());
+    EXPECT_GE(buffer->stride(), 64);
+
+    {
+        auto import1 = buffer->import();
+        auto import2 = buffer->import();
+        EXPECT_TRUE(import1);
+        EXPECT_TRUE(import2);
+        EXPECT_NE(*import1, *import2);
+    }
+}
+
+/**
+ * Test IMapper::importBuffer and IMapper::freeBuffer cross mapper instances.
+ */
+TEST_P(GraphicsMapperStableCTests, ImportFreeBufferSingleton) {
+    auto buffer = allocate({
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    });
+    ASSERT_NE(nullptr, buffer.get());
+    EXPECT_GE(buffer->stride(), 64);
+
+    buffer_handle_t bufferHandle = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.importBuffer(buffer->rawHandle(), &bufferHandle));
+    ASSERT_NE(nullptr, bufferHandle);
+
+    AIMapper* secondMapper;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, getIMapperLoader()(&secondMapper));
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, secondMapper->v5.freeBuffer(bufferHandle));
+}
+
+/**
+ * Test IMapper::importBuffer with invalid buffers.
+ */
+TEST_P(GraphicsMapperStableCTests, ImportBufferNegative) {
+    native_handle_t* invalidHandle = nullptr;
+    buffer_handle_t bufferHandle = nullptr;
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.importBuffer(invalidHandle, &bufferHandle))
+            << "importBuffer with nullptr did not fail with BAD_BUFFER";
+
+    invalidHandle = native_handle_create(0, 0);
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.importBuffer(invalidHandle, &bufferHandle))
+            << "importBuffer with invalid handle did not fail with BAD_BUFFER";
+    native_handle_delete(invalidHandle);
+}
+
+/**
+ * Test IMapper::freeBuffer with invalid buffers.
+ */
+TEST_P(GraphicsMapperStableCTests, FreeBufferNegative) {
+    native_handle_t* bufferHandle = nullptr;
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.freeBuffer(bufferHandle))
+            << "freeBuffer with nullptr did not fail with BAD_BUFFER";
+
+    bufferHandle = native_handle_create(0, 0);
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.freeBuffer(bufferHandle))
+            << "freeBuffer with invalid handle did not fail with BAD_BUFFER";
+    native_handle_delete(bufferHandle);
+
+    auto buffer = allocateGeneric();
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.freeBuffer(buffer->rawHandle()))
+            << "freeBuffer with un-imported handle did not fail with BAD_BUFFER";
+}
+
+/**
+ * Test IMapper::lock and IMapper::unlock.
+ */
+TEST_P(GraphicsMapperStableCTests, LockUnlockBasic) {
+    constexpr auto usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN;
+    auto buffer = allocate({
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = usage,
+            .reservedSize = 0,
+    });
+    ASSERT_NE(nullptr, buffer.get());
+
+    // lock buffer for writing
+    const auto& info = buffer->info();
+    const auto stride = buffer->stride();
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE,
+              mapper()->v5.lock(*handle, static_cast<int64_t>(usage), region, -1, (void**)&data));
+
+    // RGBA_8888
+    fillRGBA8888(data, info.height, stride * 4, info.width * 4);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+
+    // lock again for reading
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(usage), region,
+                                                     releaseFence, (void**)&data));
+    releaseFence = -1;
+
+    ASSERT_NO_FATAL_FAILURE(verifyRGBA8888(*handle, data, info.height, stride * 4, info.width * 4));
+
+    releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+/**
+ *  Test multiple operations associated with different color formats
+ */
+TEST_P(GraphicsMapperStableCTests, Lock_YCRCB_420_SP) {
+    BufferDescriptorInfo info{
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::YCRCB_420_SP,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    if (!buffer) {
+        ASSERT_FALSE(isSupported(info));
+        GTEST_SUCCEED() << "YCRCB_420_SP format is unsupported";
+        return;
+    }
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, -1, (void**)&data));
+
+    android_ycbcr yCbCr;
+    int64_t hSubsampling = 0;
+    int64_t vSubsampling = 0;
+    ASSERT_NO_FATAL_FAILURE(getAndroidYCbCr(*handle, data, &yCbCr, &hSubsampling, &vSubsampling));
+
+    constexpr uint32_t kCbCrSubSampleFactor = 2;
+    ASSERT_EQ(kCbCrSubSampleFactor, hSubsampling);
+    ASSERT_EQ(kCbCrSubSampleFactor, vSubsampling);
+
+    auto cbData = static_cast<uint8_t*>(yCbCr.cb);
+    auto crData = static_cast<uint8_t*>(yCbCr.cr);
+    ASSERT_EQ(crData + 1, cbData);
+    ASSERT_EQ(2, yCbCr.chroma_step);
+
+    fillYCbCrData(yCbCr, info.width, info.height, hSubsampling, vSubsampling);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+
+    // lock again for reading
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, releaseFence, (void**)&data));
+    releaseFence = -1;
+
+    ASSERT_NO_FATAL_FAILURE(getAndroidYCbCr(*handle, data, &yCbCr, &hSubsampling, &vSubsampling));
+
+    verifyYCbCrData(yCbCr, info.width, info.height, hSubsampling, vSubsampling);
+
+    releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, YV12SubsampleMetadata) {
+    BufferDescriptorInfo info{
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::YV12,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    ASSERT_NE(nullptr, buffer.get());
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, -1, (void**)&data));
+
+    auto decodeResult = getStandardMetadata<StandardMetadataType::PLANE_LAYOUTS>(*handle);
+    ASSERT_TRUE(decodeResult.has_value());
+    const auto& planeLayouts = *decodeResult;
+
+    ASSERT_EQ(3, planeLayouts.size());
+
+    auto yPlane = planeLayouts[0];
+    auto crPlane = planeLayouts[1];
+    auto cbPlane = planeLayouts[2];
+
+    constexpr uint32_t kCbCrSubSampleFactor = 2;
+    EXPECT_EQ(kCbCrSubSampleFactor, crPlane.horizontalSubsampling);
+    EXPECT_EQ(kCbCrSubSampleFactor, crPlane.verticalSubsampling);
+
+    EXPECT_EQ(kCbCrSubSampleFactor, cbPlane.horizontalSubsampling);
+    EXPECT_EQ(kCbCrSubSampleFactor, cbPlane.verticalSubsampling);
+
+    const long chromaSampleWidth = info.width / kCbCrSubSampleFactor;
+    const long chromaSampleHeight = info.height / kCbCrSubSampleFactor;
+
+    EXPECT_EQ(info.width, yPlane.widthInSamples);
+    EXPECT_EQ(info.height, yPlane.heightInSamples);
+
+    EXPECT_EQ(chromaSampleWidth, crPlane.widthInSamples);
+    EXPECT_EQ(chromaSampleHeight, crPlane.heightInSamples);
+
+    EXPECT_EQ(chromaSampleWidth, cbPlane.widthInSamples);
+    EXPECT_EQ(chromaSampleHeight, cbPlane.heightInSamples);
+
+    EXPECT_LE(crPlane.widthInSamples, crPlane.strideInBytes);
+    EXPECT_LE(cbPlane.widthInSamples, cbPlane.strideInBytes);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, Lock_YV12) {
+    BufferDescriptorInfo info{
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::YV12,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    ASSERT_NE(nullptr, buffer.get());
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, -1, (void**)&data));
+
+    android_ycbcr yCbCr;
+    int64_t hSubsampling = 0;
+    int64_t vSubsampling = 0;
+    ASSERT_NO_FATAL_FAILURE(getAndroidYCbCr(*handle, data, &yCbCr, &hSubsampling, &vSubsampling));
+
+    constexpr uint32_t kCbCrSubSampleFactor = 2;
+    ASSERT_EQ(kCbCrSubSampleFactor, hSubsampling);
+    ASSERT_EQ(kCbCrSubSampleFactor, vSubsampling);
+
+    auto cbData = static_cast<uint8_t*>(yCbCr.cb);
+    auto crData = static_cast<uint8_t*>(yCbCr.cr);
+    ASSERT_EQ(crData + yCbCr.cstride * info.height / vSubsampling, cbData);
+    ASSERT_EQ(1, yCbCr.chroma_step);
+
+    fillYCbCrData(yCbCr, info.width, info.height, hSubsampling, vSubsampling);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+
+    // lock again for reading
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, releaseFence, (void**)&data));
+    releaseFence = -1;
+
+    ASSERT_NO_FATAL_FAILURE(getAndroidYCbCr(*handle, data, &yCbCr, &hSubsampling, &vSubsampling));
+
+    verifyYCbCrData(yCbCr, info.width, info.height, hSubsampling, vSubsampling);
+
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, Lock_YCBCR_420_888) {
+    BufferDescriptorInfo info{
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::YCBCR_420_888,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    ASSERT_NE(nullptr, buffer.get());
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, -1, (void**)&data));
+
+    android_ycbcr yCbCr;
+    int64_t hSubsampling = 0;
+    int64_t vSubsampling = 0;
+    ASSERT_NO_FATAL_FAILURE(getAndroidYCbCr(*handle, data, &yCbCr, &hSubsampling, &vSubsampling));
+
+    constexpr uint32_t kCbCrSubSampleFactor = 2;
+    ASSERT_EQ(kCbCrSubSampleFactor, hSubsampling);
+    ASSERT_EQ(kCbCrSubSampleFactor, vSubsampling);
+
+    fillYCbCrData(yCbCr, info.width, info.height, hSubsampling, vSubsampling);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+
+    // lock again for reading
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, releaseFence, (void**)&data));
+    releaseFence = -1;
+
+    ASSERT_NO_FATAL_FAILURE(getAndroidYCbCr(*handle, data, &yCbCr, &hSubsampling, &vSubsampling));
+
+    verifyYCbCrData(yCbCr, info.width, info.height, hSubsampling, vSubsampling);
+
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, Lock_RAW10) {
+    BufferDescriptorInfo info{
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RAW10,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    if (!buffer) {
+        ASSERT_FALSE(isSupported(info));
+        GTEST_SUCCEED() << "RAW10 format is unsupported";
+        return;
+    }
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, -1, (void**)&data));
+
+    auto decodeResult = getStandardMetadata<StandardMetadataType::PLANE_LAYOUTS>(*handle);
+    ASSERT_TRUE(decodeResult.has_value());
+    const auto& planeLayouts = *decodeResult;
+
+    ASSERT_EQ(1, planeLayouts.size());
+    auto planeLayout = planeLayouts[0];
+
+    EXPECT_EQ(0, planeLayout.sampleIncrementInBits);
+    EXPECT_EQ(1, planeLayout.horizontalSubsampling);
+    EXPECT_EQ(1, planeLayout.verticalSubsampling);
+
+    ASSERT_EQ(1, planeLayout.components.size());
+    auto planeLayoutComponent = planeLayout.components[0];
+
+    EXPECT_EQ(PlaneLayoutComponentType::RAW,
+              static_cast<PlaneLayoutComponentType>(planeLayoutComponent.type.value));
+    EXPECT_EQ(0, planeLayoutComponent.offsetInBits % 8);
+    EXPECT_EQ(-1, planeLayoutComponent.sizeInBits);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, Lock_RAW12) {
+    BufferDescriptorInfo info{
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RAW12,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    if (!buffer) {
+        ASSERT_FALSE(isSupported(info));
+        GTEST_SUCCEED() << "RAW12 format is unsupported";
+        return;
+    }
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, -1, (void**)&data));
+
+    auto decodeResult = getStandardMetadata<StandardMetadataType::PLANE_LAYOUTS>(*handle);
+    ASSERT_TRUE(decodeResult.has_value());
+    const auto& planeLayouts = *decodeResult;
+
+    ASSERT_EQ(1, planeLayouts.size());
+    auto planeLayout = planeLayouts[0];
+
+    EXPECT_EQ(0, planeLayout.sampleIncrementInBits);
+    EXPECT_EQ(1, planeLayout.horizontalSubsampling);
+    EXPECT_EQ(1, planeLayout.verticalSubsampling);
+
+    ASSERT_EQ(1, planeLayout.components.size());
+    auto planeLayoutComponent = planeLayout.components[0];
+
+    EXPECT_EQ(PlaneLayoutComponentType::RAW,
+              static_cast<PlaneLayoutComponentType>(planeLayoutComponent.type.value));
+    EXPECT_EQ(0, planeLayoutComponent.offsetInBits % 8);
+    EXPECT_EQ(-1, planeLayoutComponent.sizeInBits);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, Lock_YCBCR_P010) {
+    BufferDescriptorInfo info{
+            .name = {"VTS_TEMP"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::YCBCR_P010,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    if (!buffer) {
+        ASSERT_FALSE(isSupported(info));
+        GTEST_SUCCEED() << "YCBCR_P010 format is unsupported";
+        return;
+    }
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width, info.height};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                     region, -1, (void**)&data));
+
+    YCbCr yCbCr;
+    ASSERT_NO_FATAL_FAILURE(yCbCr = getAndroidYCbCr_P010(*handle, data));
+
+    constexpr uint32_t kCbCrSubSampleFactor = 2;
+    ASSERT_EQ(kCbCrSubSampleFactor, yCbCr.horizontalSubSampling);
+    ASSERT_EQ(kCbCrSubSampleFactor, yCbCr.verticalSubSampling);
+
+    ASSERT_EQ(0, info.height % 2);
+
+    // fill the data
+    fillYCbCrData(yCbCr.yCbCr, info.width, info.height, yCbCr.horizontalSubSampling,
+                  yCbCr.verticalSubSampling);
+    // verify the YCbCr data
+    verifyYCbCrData(yCbCr.yCbCr, info.width, info.height, yCbCr.horizontalSubSampling,
+                    yCbCr.verticalSubSampling);
+
+    int releaseFence = -1;
+    ASSERT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, LockBadAccessRegion) {
+    auto buffer = allocateGeneric();
+    ASSERT_NE(nullptr, buffer);
+    const auto& info = buffer->info();
+
+    // lock buffer for writing
+    const ARect region{0, 0, info.width * 2, info.height * 2};
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_VALUE, mapper()->v5.lock(*handle, static_cast<int64_t>(info.usage),
+                                                          region, -1, (void**)&data));
+}
+
+TEST_P(GraphicsMapperStableCTests, UnlockNegative) {
+    native_handle_t* invalidHandle = nullptr;
+    int releaseFence = -1;
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.unlock(invalidHandle, &releaseFence))
+            << "unlock with nullptr did not fail with BAD_BUFFER";
+
+    invalidHandle = native_handle_create(0, 0);
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.unlock(invalidHandle, &releaseFence))
+            << "unlock with invalid handle did not fail with BAD_BUFFER";
+    native_handle_delete(invalidHandle);
+
+    auto buffer = allocateGeneric();
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.unlock(buffer->rawHandle(), &releaseFence))
+            << "unlock with un-imported handle did not fail with BAD_BUFFER";
+}
+
+TEST_P(GraphicsMapperStableCTests, UnlockNotImported) {
+    int releaseFence = -1;
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.unlock(buffer->rawHandle(), &releaseFence))
+            << "unlock with un-imported handle did not fail with BAD_BUFFER";
+}
+
+TEST_P(GraphicsMapperStableCTests, UnlockNotLocked) {
+    int releaseFence = -1;
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.unlock(*bufferHandle, &releaseFence))
+            << "unlock with unlocked handle did not fail with BAD_BUFFER";
+}
+
+TEST_P(GraphicsMapperStableCTests, LockUnlockNested) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    const ARect region{0, 0, buffer->info().width, buffer->info().height};
+    auto usage = static_cast<int64_t>(buffer->info().usage);
+    auto handle = buffer->import();
+    uint8_t* data = nullptr;
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, usage, region, -1, (void**)&data));
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.lock(*handle, usage, region, -1, (void**)&data))
+            << "Second lock failed";
+    int releaseFence = -1;
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+        releaseFence = -1;
+    }
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*handle, &releaseFence))
+            << "Second unlock failed";
+    if (releaseFence != -1) {
+        close(releaseFence);
+        releaseFence = -1;
+    }
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.unlock(*handle, &releaseFence))
+            << "Third, unmatched, unlock should have failed with BAD_BUFFER";
+}
+
+TEST_P(GraphicsMapperStableCTests, FlushRereadBasic) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    const auto& info = buffer->info();
+    const auto stride = buffer->stride();
+    const ARect region{0, 0, buffer->info().width, buffer->info().height};
+
+    auto writeHandle = buffer->import();
+    auto readHandle = buffer->import();
+    ASSERT_TRUE(writeHandle && readHandle);
+
+    // lock buffer for writing
+
+    uint8_t* writeData;
+    EXPECT_EQ(AIMAPPER_ERROR_NONE,
+              mapper()->v5.lock(*writeHandle, static_cast<uint64_t>(BufferUsage::CPU_WRITE_OFTEN),
+                                region, -1, (void**)&writeData));
+
+    uint8_t* readData;
+    EXPECT_EQ(AIMAPPER_ERROR_NONE,
+              mapper()->v5.lock(*readHandle, static_cast<uint64_t>(BufferUsage::CPU_READ_OFTEN),
+                                region, -1, (void**)&readData));
+
+    fillRGBA8888(writeData, info.height, stride * 4, info.width * 4);
+
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.flushLockedBuffer(*writeHandle));
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.rereadLockedBuffer(*readHandle));
+
+    ASSERT_NO_FATAL_FAILURE(
+            verifyRGBA8888(*readHandle, readData, info.height, stride * 4, info.width * 4));
+
+    int releaseFence = -1;
+
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*readHandle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+        releaseFence = -1;
+    }
+
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, mapper()->v5.unlock(*writeHandle, &releaseFence));
+    if (releaseFence != -1) {
+        close(releaseFence);
+        releaseFence = -1;
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, FlushLockedBufferBadBuffer) {
+    // Amazingly this is enough to make the compiler happy even though flushLockedBuffer
+    // is _Nonnull :shrug:
+    buffer_handle_t badBuffer = nullptr;
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.flushLockedBuffer(badBuffer));
+}
+
+TEST_P(GraphicsMapperStableCTests, RereadLockedBufferBadBuffer) {
+    buffer_handle_t badBuffer = nullptr;
+    EXPECT_EQ(AIMAPPER_ERROR_BAD_BUFFER, mapper()->v5.rereadLockedBuffer(badBuffer));
+}
+
+TEST_P(GraphicsMapperStableCTests, GetBufferId) {
+    auto buffer = allocateGeneric();
+    auto bufferHandle = buffer->import();
+    auto bufferId = getStandardMetadata<StandardMetadataType::BUFFER_ID>(*bufferHandle);
+    ASSERT_TRUE(bufferId.has_value());
+
+    auto buffer2 = allocateGeneric();
+    auto bufferHandle2 = buffer2->import();
+    auto bufferId2 = getStandardMetadata<StandardMetadataType::BUFFER_ID>(*bufferHandle2);
+    ASSERT_TRUE(bufferId2.has_value());
+
+    EXPECT_NE(*bufferId, *bufferId2);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetName) {
+    auto buffer = allocate({
+            .name = {"Hello, World!"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    });
+    auto bufferHandle = buffer->import();
+    auto name = getStandardMetadata<StandardMetadataType::NAME>(*bufferHandle);
+    ASSERT_TRUE(name.has_value());
+    EXPECT_EQ(*name, "Hello, World!");
+}
+
+TEST_P(GraphicsMapperStableCTests, GetWidthHeight) {
+    auto buffer = allocate({
+            .name = {"Hello, World!"},
+            .width = 64,
+            .height = 128,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    });
+    auto bufferHandle = buffer->import();
+    auto value = getStandardMetadata<StandardMetadataType::WIDTH>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(*value, 64);
+    value = getStandardMetadata<StandardMetadataType::HEIGHT>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(*value, 128);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetLayerCount) {
+    auto buffer = allocateGeneric();
+    auto bufferHandle = buffer->import();
+    auto value = getStandardMetadata<StandardMetadataType::LAYER_COUNT>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(*value, buffer->info().layerCount);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetPixelFormatRequested) {
+    auto buffer = allocateGeneric();
+    auto bufferHandle = buffer->import();
+    auto value = getStandardMetadata<StandardMetadataType::PIXEL_FORMAT_REQUESTED>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(*value, buffer->info().format);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetPixelFormatFourCC) {
+    auto buffer = allocate({
+            .name = {"Hello, World!"},
+            .width = 64,
+            .height = 128,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    });
+    {
+        auto bufferHandle = buffer->import();
+        auto value = getStandardMetadata<StandardMetadataType::PIXEL_FORMAT_FOURCC>(*bufferHandle);
+        ASSERT_TRUE(value.has_value());
+        EXPECT_EQ(*value, DRM_FORMAT_ABGR8888);
+    }
+
+    buffer = allocate({
+            .name = {"yv12"},
+            .width = 64,
+            .height = 128,
+            .layerCount = 1,
+            .format = PixelFormat::YV12,
+            .usage = BufferUsage::CPU_WRITE_OFTEN | BufferUsage::CPU_READ_OFTEN,
+            .reservedSize = 0,
+    });
+    {
+        auto bufferHandle = buffer->import();
+        auto value = getStandardMetadata<StandardMetadataType::PIXEL_FORMAT_FOURCC>(*bufferHandle);
+        ASSERT_TRUE(value.has_value());
+        EXPECT_EQ(*value, DRM_FORMAT_YVU420);
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, GetPixelFormatModifier) {
+    auto buffer = allocateGeneric();
+    auto bufferHandle = buffer->import();
+    auto value = getStandardMetadata<StandardMetadataType::PIXEL_FORMAT_MODIFIER>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    // Only the upper 8-bits are defined and is just the vendor ID, the lower 56 bits are
+    // then vendor specific. So there's not anything useful to assert here beyond just that
+    // we successfully queried a value
+}
+
+TEST_P(GraphicsMapperStableCTests, GetUsage) {
+    auto buffer = allocateGeneric();
+    auto bufferHandle = buffer->import();
+    auto value = getStandardMetadata<StandardMetadataType::USAGE>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(buffer->info().usage, *value);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetAllocationSize) {
+    auto buffer = allocateGeneric();
+    auto bufferHandle = buffer->import();
+    auto value = getStandardMetadata<StandardMetadataType::ALLOCATION_SIZE>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    const auto estimatedSize = buffer->stride() * buffer->info().height * 4;
+    // This buffer has CPU usage, so we expect at least stride * height * 4 since it should be
+    // generally linear uncompressed.
+    EXPECT_GE(*value, estimatedSize)
+            << "Expected allocation size to be at least stride * height * 4bpp";
+    // Might need refining, but hopefully this a generous-enough upper-bound?
+    EXPECT_LT(*value, estimatedSize * 2)
+            << "Expected allocation size to less than double stride * height * 4bpp";
+}
+
+TEST_P(GraphicsMapperStableCTests, GetProtectedContent) {
+    const BufferDescriptorInfo info{
+            .name = {"prot8888"},
+            .width = 64,
+            .height = 64,
+            .layerCount = 1,
+            .format = PixelFormat::RGBA_8888,
+            .usage = BufferUsage::PROTECTED | BufferUsage::COMPOSER_OVERLAY,
+            .reservedSize = 0,
+    };
+    auto buffer = allocate(info);
+    if (!buffer) {
+        ASSERT_FALSE(isSupported(info))
+                << "Allocation of trivial sized buffer failed, so isSupported() must be false";
+        GTEST_SUCCEED() << "PROTECTED RGBA_8888 is unsupported";
+        return;
+    }
+    auto bufferHandle = buffer->import();
+    auto value = getStandardMetadata<StandardMetadataType::PROTECTED_CONTENT>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(*value, 1);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetCompression) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::COMPRESSION>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(gralloc4::Compression_None.name, value->name);
+    EXPECT_EQ(gralloc4::Compression_None.value, value->value);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetInterlaced) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::INTERLACED>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(gralloc4::Interlaced_None.name, value->name);
+    EXPECT_EQ(gralloc4::Interlaced_None.value, value->value);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetChromaSiting) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::CHROMA_SITING>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(gralloc4::ChromaSiting_None.name, value->name);
+    EXPECT_EQ(gralloc4::ChromaSiting_None.value, value->value);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetPlaneLayouts) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::PLANE_LAYOUTS>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    ASSERT_NO_FATAL_FAILURE(verifyRGBA8888PlaneLayouts(*value));
+}
+
+TEST_P(GraphicsMapperStableCTests, GetCrop) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::CROP>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(1, value->size());
+    const Rect expected{0, 0, buffer->info().width, buffer->info().height};
+    EXPECT_EQ(expected, value->at(0));
+}
+
+TEST_P(GraphicsMapperStableCTests, GetSetDataspace) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::DATASPACE>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(Dataspace::UNKNOWN, *value);
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, setStandardMetadata<StandardMetadataType::DATASPACE>(
+                                           *bufferHandle, Dataspace::DISPLAY_P3));
+    value = getStandardMetadata<StandardMetadataType::DATASPACE>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(Dataspace::DISPLAY_P3, *value);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetSetBlendMode) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::BLEND_MODE>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(BlendMode::INVALID, *value);
+    EXPECT_EQ(AIMAPPER_ERROR_NONE, setStandardMetadata<StandardMetadataType::BLEND_MODE>(
+                                           *bufferHandle, BlendMode::COVERAGE));
+    value = getStandardMetadata<StandardMetadataType::BLEND_MODE>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(BlendMode::COVERAGE, *value);
+}
+
+TEST_P(GraphicsMapperStableCTests, GetSetSmpte2086) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::SMPTE2086>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_FALSE(value->has_value());
+
+    // TODO: Maybe use something resembling real values, but validation isn't supposed to happen
+    // here anyway so :shrug:
+    const Smpte2086 awesomeHdr{
+            XyColor{1.f, 1.f},      XyColor{2.f, 2.f}, XyColor{3.f, 3.f},
+            XyColor{400.f, 1000.f}, 100000.0f,         0.0001f,
+    };
+    EXPECT_EQ(AIMAPPER_ERROR_NONE,
+              setStandardMetadata<StandardMetadataType::SMPTE2086>(*bufferHandle, awesomeHdr));
+    value = getStandardMetadata<StandardMetadataType::SMPTE2086>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    ASSERT_TRUE(value->has_value());
+    EXPECT_EQ(awesomeHdr, *value);
+
+    EXPECT_EQ(AIMAPPER_ERROR_NONE,
+              setStandardMetadata<StandardMetadataType::SMPTE2086>(*bufferHandle, std::nullopt));
+    value = getStandardMetadata<StandardMetadataType::SMPTE2086>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_FALSE(value->has_value());
+}
+
+TEST_P(GraphicsMapperStableCTests, GetCta861_3) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::CTA861_3>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_FALSE(value->has_value());
+
+    const Cta861_3 genericHlgish{1000.f, 140.f};
+    EXPECT_EQ(AIMAPPER_ERROR_NONE,
+              setStandardMetadata<StandardMetadataType::CTA861_3>(*bufferHandle, genericHlgish));
+    value = getStandardMetadata<StandardMetadataType::CTA861_3>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    ASSERT_TRUE(value->has_value());
+    EXPECT_EQ(genericHlgish, *value);
+
+    EXPECT_EQ(AIMAPPER_ERROR_NONE,
+              setStandardMetadata<StandardMetadataType::CTA861_3>(*bufferHandle, std::nullopt));
+    value = getStandardMetadata<StandardMetadataType::CTA861_3>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_FALSE(value->has_value());
+}
+
+TEST_P(GraphicsMapperStableCTests, GetSmpte2094_10) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::SMPTE2094_10>(*bufferHandle);
+    if (value.has_value()) {
+        EXPECT_FALSE(value->has_value());
+    }
+}
+
+TEST_P(GraphicsMapperStableCTests, GetSmpte2094_40) {
+    auto buffer = allocateGeneric();
+    ASSERT_TRUE(buffer);
+    auto bufferHandle = buffer->import();
+    ASSERT_TRUE(bufferHandle);
+    auto value = getStandardMetadata<StandardMetadataType::SMPTE2094_40>(*bufferHandle);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_FALSE(value->has_value());
+}
+
+std::vector<std::tuple<std::string, std::shared_ptr<IAllocator>>> getIAllocatorsAtLeastVersion(
+        int32_t minVersion) {
+    auto instanceNames = getAidlHalInstanceNames(IAllocator::descriptor);
+    std::vector<std::tuple<std::string, std::shared_ptr<IAllocator>>> filteredInstances;
+    filteredInstances.reserve(instanceNames.size());
+    for (const auto& name : instanceNames) {
+        auto allocator =
+                IAllocator::fromBinder(ndk::SpAIBinder(AServiceManager_checkService(name.c_str())));
+        int32_t version = 0;
+        if (allocator->getInterfaceVersion(&version).isOk()) {
+            if (version >= minVersion) {
+                filteredInstances.emplace_back(name, std::move(allocator));
+            }
+        }
+    }
+    return filteredInstances;
+}
+
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(GraphicsMapperStableCTests);
+INSTANTIATE_TEST_CASE_P(PerInstance, GraphicsMapperStableCTests,
+                        testing::ValuesIn(getIAllocatorsAtLeastVersion(2)),
+                        [](auto info) -> std::string {
+                            std::string name =
+                                    std::to_string(info.index) + "/" + std::get<0>(info.param);
+                            return Sanitize(name);
+                        });
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