Implement converters for bufferqueue@2.0

Test: make cts -j123 && cts-tradefed run cts-dev -m \
CtsMediaTestCases --compatibility:module-arg \
CtsMediaTestCases:include-annotation:\
android.platform.test.annotations.RequiresDevice

Bug: 112508112
Change-Id: I60f2068788136b01c45e03fc4d846d4e37edc7f2

23 files changed, 1936 insertions, 68 deletions

diff --git a/libs/gui/Android.bp b/libs/gui/Android.bp
index 8b663bc8ec..4c2e6532ff 100644
--- a/libs/gui/Android.bp
+++ b/libs/gui/Android.bp
@@ -31,44 +31,7 @@ cc_library_shared {
         "-Werror",
     ],
     cppflags: [
-        "-Weverything",
-
-        // The static constructors and destructors in this library have not been noted to
-        // introduce significant overheads
-        "-Wno-exit-time-destructors",
-        "-Wno-global-constructors",
-
-        // We only care about compiling as C++14
-        "-Wno-c++98-compat-pedantic",
-
-        // We don't need to enumerate every case in a switch as long as a default case
-        // is present
-        "-Wno-switch-enum",
-
-        // Allow calling variadic macros without a __VA_ARGS__ list
-        "-Wno-gnu-zero-variadic-macro-arguments",
-
-        // Don't warn about struct padding
-        "-Wno-padded",
-
-        // We are aware of the risks inherent in comparing floats for equality
-        "-Wno-float-equal",
-
-        // Pure abstract classes trigger this warning
-        "-Wno-weak-vtables",
-
-        // Allow four-character integer literals
-        "-Wno-four-char-constants",
-
-        // Allow documentation warnings
-        "-Wno-documentation",
-
-        // Allow implicit instantiation for templated class function
-        "-Wno-undefined-func-template",
-
-        // Allow explicitly marking struct as packed even when unnecessary
-        "-Wno-packed",
-
+        "-Wextra",
         "-DDEBUG_ONLY_CODE=0",
     ],
 
@@ -121,30 +84,38 @@ cc_library_shared {
         "view/Surface.cpp",
         "bufferqueue/1.0/B2HProducerListener.cpp",
         "bufferqueue/1.0/H2BGraphicBufferProducer.cpp",
+        "bufferqueue/1.0/H2BProducerListener.cpp",
+        "bufferqueue/2.0/B2HGraphicBufferProducer.cpp",
+        "bufferqueue/2.0/B2HProducerListener.cpp",
+        "bufferqueue/2.0/H2BGraphicBufferProducer.cpp",
+        "bufferqueue/2.0/H2BProducerListener.cpp",
+        "bufferqueue/2.0/types.cpp",
     ],
 
     shared_libs: [
         "android.frameworks.bufferhub@1.0",
+        "android.hardware.graphics.bufferqueue@1.0",
+        "android.hardware.graphics.bufferqueue@2.0",
         "android.hardware.graphics.common@1.1",
+        "android.hardware.graphics.common@1.2",
+        "android.hidl.token@1.0-utils",
         "libbase",
-        "libsync",
         "libbinder",
-        "libhwbinder",
         "libbufferhub",
         "libbufferhubqueue", // TODO(b/70046255): Remove this once BufferHub is integrated into libgui.
-        "libpdx_default_transport",
         "libcutils",
         "libEGL",
         "libGLESv2",
-        "libui",
-        "libutils",
-        "libnativewindow",
-        "liblog",
-        "libinput",
         "libhidlbase",
         "libhidltransport",
-        "android.hidl.token@1.0-utils",
-        "android.hardware.graphics.bufferqueue@1.0",
+        "libhwbinder",
+        "libinput",
+        "liblog",
+        "libnativewindow",
+        "libpdx_default_transport",
+        "libsync",
+        "libui",
+        "libutils",
         "libvndksupport",
     ],
 
@@ -163,16 +134,16 @@ cc_library_shared {
                 "android.frameworks.bufferhub@1.0",
                 "libbufferhub",
                 "libbufferhubqueue",
-                "libpdx_default_transport",
                 "libinput",
+                "libpdx_default_transport",
             ],
         },
     },
 
     header_libs: [
         "libdvr_headers",
-        "libnativebase_headers",
         "libgui_headers",
+        "libnativebase_headers",
         "libpdx_headers",
     ],
 
@@ -181,9 +152,11 @@ cc_library_shared {
         "libEGL",
         "libnativewindow",
         "libui",
-        "android.hidl.token@1.0-utils",
         "android.hardware.graphics.bufferqueue@1.0",
+        "android.hardware.graphics.bufferqueue@2.0",
         "android.hardware.graphics.common@1.1",
+        "android.hardware.graphics.common@1.2",
+        "android.hidl.token@1.0-utils",
     ],
 
     export_header_lib_headers: [
diff --git a/libs/gui/IGraphicBufferProducer.cpp b/libs/gui/IGraphicBufferProducer.cpp
index 8907de4b5d..9dde15dd0e 100644
--- a/libs/gui/IGraphicBufferProducer.cpp
+++ b/libs/gui/IGraphicBufferProducer.cpp
@@ -30,16 +30,21 @@
 #ifndef NO_BUFFERHUB
 #include <gui/BufferHubProducer.h>
 #endif
+
+#include <gui/bufferqueue/1.0/H2BGraphicBufferProducer.h>
+#include <gui/bufferqueue/2.0/H2BGraphicBufferProducer.h>
 #include <gui/BufferQueueDefs.h>
 #include <gui/IGraphicBufferProducer.h>
 #include <gui/IProducerListener.h>
 
-#include <gui/bufferqueue/1.0/H2BGraphicBufferProducer.h>
-
 namespace android {
 // ----------------------------------------------------------------------------
 
-using ::android::hardware::graphics::bufferqueue::V1_0::utils::
+using H2BGraphicBufferProducerV1_0 =
+        ::android::hardware::graphics::bufferqueue::V1_0::utils::
+        H2BGraphicBufferProducer;
+using H2BGraphicBufferProducerV2_0 =
+        ::android::hardware::graphics::bufferqueue::V2_0::utils::
         H2BGraphicBufferProducer;
 
 enum {
@@ -534,7 +539,9 @@ public:
 BpGraphicBufferProducer::~BpGraphicBufferProducer() {}
 
 class HpGraphicBufferProducer : public HpInterface<
-        BpGraphicBufferProducer, H2BGraphicBufferProducer> {
+        BpGraphicBufferProducer,
+        H2BGraphicBufferProducerV1_0,
+        H2BGraphicBufferProducerV2_0> {
 public:
     explicit HpGraphicBufferProducer(const sp<IBinder>& base) : PBase(base) {}
 
diff --git a/libs/gui/IProducerListener.cpp b/libs/gui/IProducerListener.cpp
index 62abfa81c4..936063a5bd 100644
--- a/libs/gui/IProducerListener.cpp
+++ b/libs/gui/IProducerListener.cpp
@@ -15,7 +15,8 @@
  */
 
 #include <binder/Parcel.h>
-
+#include <gui/bufferqueue/1.0/H2BProducerListener.h>
+#include <gui/bufferqueue/2.0/H2BProducerListener.h>
 #include <gui/IProducerListener.h>
 
 namespace android {
@@ -61,7 +62,24 @@ public:
 // translation unit (see clang warning -Wweak-vtables)
 BpProducerListener::~BpProducerListener() {}
 
-IMPLEMENT_META_INTERFACE(ProducerListener, "android.gui.IProducerListener")
+class HpProducerListener : public HpInterface<
+        BpProducerListener,
+        hardware::graphics::bufferqueue::V1_0::utils::H2BProducerListener,
+        hardware::graphics::bufferqueue::V2_0::utils::H2BProducerListener> {
+public:
+    explicit HpProducerListener(const sp<IBinder>& base) : PBase{base} {}
+
+    virtual void onBufferReleased() override {
+        mBase->onBufferReleased();
+    }
+
+    virtual bool needsReleaseNotify() override {
+        return mBase->needsReleaseNotify();
+    }
+};
+
+IMPLEMENT_HYBRID_META_INTERFACE(ProducerListener,
+        "android.gui.IProducerListener")
 
 status_t BnProducerListener::onTransact(uint32_t code, const Parcel& data,
         Parcel* reply, uint32_t flags) {
diff --git a/libs/gui/bufferqueue/1.0/H2BProducerListener.cpp b/libs/gui/bufferqueue/1.0/H2BProducerListener.cpp
new file mode 100644
index 0000000000..2712f42c89
--- /dev/null
+++ b/libs/gui/bufferqueue/1.0/H2BProducerListener.cpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2019 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "H2BProducerListener@1.0"
+
+#include <android-base/logging.h>
+
+#include <gui/bufferqueue/1.0/H2BProducerListener.h>
+#include <hidl/Status.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V1_0 {
+namespace utils {
+
+using ::android::hardware::Return;
+
+H2BProducerListener::H2BProducerListener(sp<HProducerListener> const& base)
+      : CBase{base} {
+}
+
+void H2BProducerListener::onBufferReleased() {
+    if (!mBase->onBufferReleased().isOk()) {
+        LOG(ERROR) << "onBufferReleased: transaction failed.";
+    }
+}
+
+bool H2BProducerListener::needsReleaseNotify() {
+    Return<bool> transResult = mBase->needsReleaseNotify();
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "needsReleaseNotify: transaction failed.";
+        return false;
+    }
+    return static_cast<bool>(transResult);
+}
+
+}  // namespace utils
+}  // namespace V1_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
diff --git a/libs/gui/bufferqueue/2.0/B2HGraphicBufferProducer.cpp b/libs/gui/bufferqueue/2.0/B2HGraphicBufferProducer.cpp
new file mode 100644
index 0000000000..e0395939e9
--- /dev/null
+++ b/libs/gui/bufferqueue/2.0/B2HGraphicBufferProducer.cpp
@@ -0,0 +1,331 @@
+/*
+ * Copyright 2019 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "H2BGraphicBufferProducer@2.0"
+
+#include <android-base/logging.h>
+
+#include <android/hardware/graphics/bufferqueue/2.0/types.h>
+#include <android/hardware/graphics/common/1.2/types.h>
+#include <gui/bufferqueue/2.0/H2BProducerListener.h>
+#include <gui/bufferqueue/2.0/B2HGraphicBufferProducer.h>
+#include <gui/bufferqueue/2.0/types.h>
+#include <ui/GraphicBuffer.h>
+#include <ui/Rect.h>
+#include <ui/Region.h>
+#include <vndk/hardware_buffer.h>
+
+namespace android {
+
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+// B2HGraphicBufferProducer
+// ========================
+
+B2HGraphicBufferProducer::B2HGraphicBufferProducer(
+        sp<BGraphicBufferProducer> const& base)
+      : mBase{base} {
+}
+
+Return<HStatus> B2HGraphicBufferProducer::setMaxDequeuedBufferCount(
+        int32_t maxDequeuedBuffers) {
+    HStatus hStatus{};
+    bool converted = b2h(
+            mBase->setMaxDequeuedBufferCount(
+                static_cast<int>(maxDequeuedBuffers)),
+            &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<void> B2HGraphicBufferProducer::requestBuffer(
+        int32_t slot,
+        requestBuffer_cb _hidl_cb) {
+    sp<GraphicBuffer> bBuffer;
+    HStatus hStatus{};
+    HardwareBuffer hBuffer{};
+    uint32_t hGenerationNumber{};
+    bool converted =
+            b2h(mBase->requestBuffer(
+                    static_cast<int>(slot), &bBuffer),
+                &hStatus) &&
+            b2h(bBuffer, &hBuffer, &hGenerationNumber);
+    _hidl_cb(converted ? hStatus : HStatus::UNKNOWN_ERROR,
+             hBuffer, hGenerationNumber);
+    return {};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::setAsyncMode(bool async) {
+    HStatus hStatus{};
+    bool converted = b2h(mBase->setAsyncMode(async), &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<void> B2HGraphicBufferProducer::dequeueBuffer(
+        DequeueBufferInput const& input,
+        dequeueBuffer_cb _hidl_cb) {
+    int bSlot{};
+    sp<BFence> bFence;
+    HStatus hStatus{};
+    DequeueBufferOutput hOutput{};
+    HFenceWrapper hFenceWrapper;
+    bool converted =
+            b2h(mBase->dequeueBuffer(
+                    &bSlot,
+                    &bFence,
+                    input.width,
+                    input.height,
+                    static_cast<PixelFormat>(input.format),
+                    input.usage,
+                    &hOutput.bufferAge,
+                    nullptr /* outTimestamps */),
+                &hStatus,
+                &hOutput.bufferNeedsReallocation,
+                &hOutput.releaseAllBuffers) &&
+            b2h(bFence, &hFenceWrapper);
+    hOutput.fence = hFenceWrapper.getHandle();
+    _hidl_cb(converted ? hStatus : HStatus::UNKNOWN_ERROR,
+             static_cast<int32_t>(bSlot),
+             hOutput);
+    return {};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::detachBuffer(int32_t slot) {
+    HStatus hStatus{};
+    bool converted = b2h(
+            mBase->detachBuffer(static_cast<int>(slot)), &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<void> B2HGraphicBufferProducer::detachNextBuffer(
+        detachNextBuffer_cb _hidl_cb) {
+    sp<GraphicBuffer> bBuffer;
+    sp<BFence> bFence;
+    HStatus hStatus{};
+    HardwareBuffer hBuffer{};
+    HFenceWrapper hFenceWrapper;
+    bool converted =
+            b2h(mBase->detachNextBuffer(&bBuffer, &bFence), &hStatus) &&
+            b2h(bBuffer, &hBuffer) &&
+            b2h(bFence, &hFenceWrapper);
+    _hidl_cb(converted ? hStatus : HStatus::UNKNOWN_ERROR,
+             hBuffer,
+             hFenceWrapper.getHandle());
+    return {};
+}
+
+Return<void> B2HGraphicBufferProducer::attachBuffer(
+        HardwareBuffer const& hBuffer,
+        uint32_t generationNumber,
+        attachBuffer_cb _hidl_cb) {
+    sp<GraphicBuffer> bBuffer;
+    if (!h2b(hBuffer, &bBuffer) || !bBuffer) {
+        _hidl_cb(HStatus::UNKNOWN_ERROR,
+                 static_cast<int32_t>(SlotIndex::INVALID),
+                 false);
+        return {};
+    }
+    bBuffer->setGenerationNumber(generationNumber);
+
+    int bSlot{};
+    HStatus hStatus{};
+    bool releaseAllBuffers{};
+    bool converted = b2h(
+            mBase->attachBuffer(&bSlot, bBuffer), &hStatus,
+            nullptr /* bufferNeedsReallocation */,
+            &releaseAllBuffers);
+    _hidl_cb(converted ? hStatus : HStatus::UNKNOWN_ERROR,
+             static_cast<int32_t>(bSlot),
+             releaseAllBuffers);
+    return {};
+}
+
+Return<void> B2HGraphicBufferProducer::queueBuffer(
+        int32_t slot,
+        QueueBufferInput const& hInput,
+        queueBuffer_cb _hidl_cb) {
+    using HOutput = QueueBufferOutput;
+    using BInput = BGraphicBufferProducer::QueueBufferInput;
+    using BOutput = BGraphicBufferProducer::QueueBufferOutput;
+
+    BInput bInput{
+            hInput.timestamp,
+            hInput.isAutoTimestamp,
+            static_cast<android_dataspace>(hInput.dataSpace),
+            {}, /* crop */
+            0 /* scalingMode = NATIVE_WINDOW_SCALING_MODE_FREEZE */,
+            static_cast<uint32_t>(hInput.transform),
+            {}, /* fence */
+            static_cast<uint32_t>(hInput.stickyTransform),
+            false /* getFrameTimestamps */};
+
+    // Convert crop.
+    if (!h2b(hInput.crop, &bInput.crop)) {
+        _hidl_cb(HStatus::UNKNOWN_ERROR, HOutput{});
+        return {};
+    }
+
+    // Convert surfaceDamage.
+    if (!h2b(hInput.surfaceDamage, &bInput.surfaceDamage)) {
+        _hidl_cb(HStatus::UNKNOWN_ERROR, HOutput{});
+        return {};
+    }
+
+    // Convert fence.
+    if (!h2b(hInput.fence, &bInput.fence)) {
+        _hidl_cb(HStatus::UNKNOWN_ERROR, HOutput{});
+        return {};
+    }
+
+    BOutput bOutput{};
+    HStatus hStatus{};
+    bool converted = b2h(
+            mBase->queueBuffer(static_cast<int>(slot), bInput, &bOutput),
+            &hStatus);
+
+    _hidl_cb(converted ? hStatus : HStatus::UNKNOWN_ERROR,
+             HOutput{bOutput.width,
+                     bOutput.height,
+                     static_cast<int32_t>(bOutput.transformHint),
+                     bOutput.numPendingBuffers,
+                     bOutput.nextFrameNumber,
+                     bOutput.bufferReplaced});
+    return {};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::cancelBuffer(
+        int32_t slot,
+        hidl_handle const& fence) {
+    sp<BFence> bFence;
+    if (!h2b(fence.getNativeHandle(), &bFence)) {
+        return {HStatus::UNKNOWN_ERROR};
+    }
+    HStatus hStatus{};
+    bool converted = b2h(
+            mBase->cancelBuffer(static_cast<int>(slot), bFence),
+            &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<void> B2HGraphicBufferProducer::query(int32_t what, query_cb _hidl_cb) {
+    int value{};
+    int result = mBase->query(static_cast<int>(what), &value);
+    _hidl_cb(static_cast<int32_t>(result), static_cast<int32_t>(value));
+    return {};
+}
+
+Return<void> B2HGraphicBufferProducer::connect(
+        sp<HProducerListener> const& hListener,
+        HConnectionType hConnectionType,
+        bool producerControlledByApp,
+        connect_cb _hidl_cb) {
+    using BOutput = BGraphicBufferProducer::QueueBufferOutput;
+    using HOutput = HGraphicBufferProducer::QueueBufferOutput;
+    sp<BProducerListener> bListener = new H2BProducerListener(hListener);
+    if (!bListener) {
+        _hidl_cb(HStatus::UNKNOWN_ERROR, HOutput{});
+        return {};
+    }
+    int bConnectionType;
+    if (!h2b(hConnectionType, &bConnectionType)) {
+        _hidl_cb(HStatus::UNKNOWN_ERROR, HOutput{});
+        return {};
+    }
+    BOutput bOutput{};
+    HStatus hStatus{};
+    bool converted = b2h(
+            mBase->connect(bListener,
+                           bConnectionType,
+                           producerControlledByApp,
+                           &bOutput),
+            &hStatus);
+    _hidl_cb(converted ? hStatus : HStatus::UNKNOWN_ERROR,
+             HOutput{bOutput.width,
+                     bOutput.height,
+                     static_cast<int32_t>(bOutput.transformHint),
+                     bOutput.numPendingBuffers,
+                     bOutput.nextFrameNumber,
+                     bOutput.bufferReplaced});
+    return {};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::disconnect(
+        HConnectionType hConnectionType) {
+    int bConnectionType;
+    if (!h2b(hConnectionType, &bConnectionType)) {
+        return {HStatus::UNKNOWN_ERROR};
+    }
+    HStatus hStatus{};
+    bool converted = b2h(mBase->disconnect(bConnectionType), &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::allocateBuffers(
+        uint32_t width, uint32_t height,
+        uint32_t format, uint64_t usage) {
+    mBase->allocateBuffers(
+            width, height, static_cast<PixelFormat>(format), usage);
+    return {HStatus::OK};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::allowAllocation(bool allow) {
+    HStatus hStatus{};
+    bool converted = b2h(mBase->allowAllocation(allow), &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::setGenerationNumber(
+        uint32_t generationNumber) {
+    HStatus hStatus{};
+    bool converted = b2h(
+            mBase->setGenerationNumber(generationNumber),
+            &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<HStatus> B2HGraphicBufferProducer::setDequeueTimeout(
+        int64_t timeoutNs) {
+    HStatus hStatus{};
+    bool converted = b2h(
+            mBase->setDequeueTimeout(static_cast<nsecs_t>(timeoutNs)),
+            &hStatus);
+    return {converted ? hStatus : HStatus::UNKNOWN_ERROR};
+}
+
+Return<uint64_t> B2HGraphicBufferProducer::getUniqueId() {
+    uint64_t outId{};
+    HStatus hStatus{};
+    bool converted = b2h(mBase->getUniqueId(&outId), &hStatus);
+    return {converted ? outId : 0};
+}
+
+Return<void> B2HGraphicBufferProducer::getConsumerName(
+        getConsumerName_cb _hidl_cb) {
+    _hidl_cb(hidl_string{mBase->getConsumerName().c_str()});
+    return {};
+}
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
diff --git a/libs/gui/bufferqueue/2.0/B2HProducerListener.cpp b/libs/gui/bufferqueue/2.0/B2HProducerListener.cpp
new file mode 100644
index 0000000000..c4c96eba50
--- /dev/null
+++ b/libs/gui/bufferqueue/2.0/B2HProducerListener.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2019 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 <gui/bufferqueue/2.0/B2HProducerListener.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+// B2HProducerListener
+B2HProducerListener::B2HProducerListener(sp<BProducerListener> const& base)
+      : mBase{base},
+        mNeedsReleaseNotify{base ? base->needsReleaseNotify() : false} {
+}
+
+Return<void> B2HProducerListener::onBuffersReleased(uint32_t count) {
+    if (mNeedsReleaseNotify) {
+        for (; count > 0; --count) {
+            mBase->onBufferReleased();
+        }
+    }
+    return {};
+}
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
diff --git a/libs/gui/bufferqueue/2.0/H2BGraphicBufferProducer.cpp b/libs/gui/bufferqueue/2.0/H2BGraphicBufferProducer.cpp
new file mode 100644
index 0000000000..1023ef108a
--- /dev/null
+++ b/libs/gui/bufferqueue/2.0/H2BGraphicBufferProducer.cpp
@@ -0,0 +1,514 @@
+/*
+ * Copyright 2019 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "H2BGraphicBufferProducer@2.0"
+
+#include <android-base/logging.h>
+
+#include <android/hardware/graphics/common/1.2/types.h>
+#include <gui/bufferqueue/2.0/B2HProducerListener.h>
+#include <gui/bufferqueue/2.0/H2BGraphicBufferProducer.h>
+#include <gui/bufferqueue/2.0/types.h>
+#include <ui/GraphicBuffer.h>
+#include <ui/Rect.h>
+#include <ui/Region.h>
+#include <vndk/hardware_buffer.h>
+
+namespace android {
+
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+// H2BGraphicBufferProducer
+// ========================
+
+status_t H2BGraphicBufferProducer::requestBuffer(int slot,
+                                                 sp<GraphicBuffer>* bBuffer) {
+    bool converted{};
+    status_t bStatus{};
+    Return<void> transResult = mBase->requestBuffer(slot,
+            [&converted, &bStatus, bBuffer](
+                    HStatus hStatus,
+                    HardwareBuffer const& hBuffer,
+                    uint32_t generationNumber) {
+                converted =
+                        h2b(hStatus, &bStatus) &&
+                        h2b(hBuffer, bBuffer);
+                if (*bBuffer) {
+                    (*bBuffer)->setGenerationNumber(generationNumber);
+                }
+            });
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "requestBuffer: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!converted) {
+        LOG(ERROR) << "requestBuffer: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::setMaxDequeuedBufferCount(
+        int maxDequeuedBuffers) {
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->setMaxDequeuedBufferCount(
+            static_cast<int32_t>(maxDequeuedBuffers));
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "setMaxDequeuedBufferCount: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "setMaxDequeuedBufferCount: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::setAsyncMode(bool async) {
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->setAsyncMode(async);
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "setAsyncMode: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "setAsyncMode: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::dequeueBuffer(
+        int* slot, sp<BFence>* fence,
+        uint32_t w, uint32_t h,
+        PixelFormat format, uint64_t usage,
+        uint64_t* outBufferAge, FrameEventHistoryDelta* /* outTimestamps */) {
+
+    using HInput = HGraphicBufferProducer::DequeueBufferInput;
+    HInput input{w, h, static_cast<uint32_t>(format), usage};
+
+    using HOutput = HGraphicBufferProducer::DequeueBufferOutput;
+    bool converted{};
+    status_t bStatus{};
+    Return<void> transResult = mBase->dequeueBuffer(input,
+            [&converted, &bStatus, slot, fence, outBufferAge] (
+                    HStatus hStatus, int32_t hSlot, HOutput const& hOutput) {
+                converted = h2b(hStatus, &bStatus);
+                if (!converted || bStatus != OK) {
+                    return;
+                }
+                *slot = hSlot;
+                *outBufferAge = hOutput.bufferAge;
+                bStatus =
+                        (hOutput.bufferNeedsReallocation ?
+                        BUFFER_NEEDS_REALLOCATION : 0) |
+                        (hOutput.releaseAllBuffers ?
+                        RELEASE_ALL_BUFFERS : 0);
+                converted = h2b(hOutput.fence, fence);
+            });
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "dequeueBuffer: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!converted) {
+        LOG(ERROR) << "dequeueBuffer: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::detachBuffer(int slot) {
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->detachBuffer(
+            static_cast<int32_t>(slot));
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "detachBuffer: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "detachBuffer: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::detachNextBuffer(
+        sp<GraphicBuffer>* outBuffer, sp<BFence>* outFence) {
+    bool converted{};
+    status_t bStatus{};
+    Return<void> transResult = mBase->detachNextBuffer(
+            [&converted, &bStatus, outBuffer, outFence] (
+                    HStatus hStatus,
+                    HardwareBuffer const& hBuffer,
+                    hidl_handle const& hFence) {
+                converted = h2b(hStatus, &bStatus) &&
+                    h2b(hBuffer, outBuffer) &&
+                    h2b(hFence, outFence);
+            });
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "detachNextBuffer: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!converted) {
+        LOG(ERROR) << "detachNextBuffer: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::attachBuffer(
+        int* outSlot, sp<GraphicBuffer> const& buffer) {
+    HardwareBuffer hBuffer{};
+    uint32_t hGenerationNumber{};
+    if (!b2h(buffer, &hBuffer, &hGenerationNumber)) {
+        LOG(ERROR) << "attachBuffer: invalid input buffer.";
+        return BAD_VALUE;
+    }
+
+    bool converted{};
+    status_t bStatus{};
+    Return<void> transResult = mBase->attachBuffer(hBuffer, hGenerationNumber,
+            [&converted, &bStatus, outSlot](
+                    HStatus hStatus, int32_t hSlot, bool releaseAllBuffers) {
+                converted = h2b(hStatus, &bStatus);
+                *outSlot = static_cast<int>(hSlot);
+                if (converted && releaseAllBuffers && bStatus == OK) {
+                    bStatus = IGraphicBufferProducer::RELEASE_ALL_BUFFERS;
+                }
+            });
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "attachBuffer: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!converted) {
+        LOG(ERROR) << "attachBuffer: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::queueBuffer(
+        int slot,
+        QueueBufferInput const& input,
+        QueueBufferOutput* output) {
+    HRect hCrop{};
+    (void)b2h(input.crop, &hCrop);
+
+    using HInput = HGraphicBufferProducer::QueueBufferInput;
+    HInput hInput{
+            input.timestamp,
+            static_cast<bool>(input.isAutoTimestamp),
+            static_cast<int32_t>(input.dataSpace),
+            {}, // crop
+            static_cast<int32_t>(input.transform),
+            static_cast<int32_t>(input.stickyTransform),
+            {}, // fence
+            {}  // surfaceDamage
+            };
+
+    // Convert crop.
+    if (!b2h(input.crop, &hInput.crop)) {
+        LOG(ERROR) << "queueBuffer: corrupted input crop rectangle.";
+        return UNKNOWN_ERROR;
+    }
+
+    // Convert surfaceDamage.
+    size_t numRects;
+    Rect const* rectArray = input.surfaceDamage.getArray(&numRects);
+    hInput.surfaceDamage.resize(numRects);
+    for (size_t i = 0; i < numRects; ++i) {
+        if (!b2h(rectArray[i], &hInput.surfaceDamage[i])) {
+            LOG(ERROR) << "queueBuffer: corrupted input surface damage.";
+            return UNKNOWN_ERROR;
+        }
+    }
+
+    // Convert fence.
+    HFenceWrapper hFenceWrapper;
+    if (!b2h(input.fence, &hFenceWrapper)) {
+        LOG(ERROR) << "queueBuffer: corrupted input fence.";
+        return UNKNOWN_ERROR;
+    }
+    hInput.fence = hFenceWrapper.getHandle();
+
+    using HOutput = HGraphicBufferProducer::QueueBufferOutput;
+    bool converted{};
+    status_t bStatus{};
+    Return<void> transResult = mBase->queueBuffer(
+            static_cast<int32_t>(slot),
+            hInput,
+            [&converted, &bStatus, output](
+                    HStatus hStatus,
+                    HOutput const& hOutput) {
+                converted = h2b(hStatus, &bStatus);
+                output->width = hOutput.width;
+                output->height = hOutput.height;
+                output->transformHint =
+                        static_cast<uint32_t>(hOutput.transformHint);
+                output->numPendingBuffers = hOutput.numPendingBuffers;
+                output->nextFrameNumber = hOutput.nextFrameNumber;
+                output->bufferReplaced = hOutput.bufferReplaced;
+            });
+
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "queueBuffer: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!converted) {
+        LOG(ERROR) << "queueBuffer: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::cancelBuffer(int slot, sp<BFence> const& fence) {
+    HFenceWrapper hFenceWrapper;
+    if (!b2h(fence, &hFenceWrapper)) {
+        LOG(ERROR) << "cancelBuffer: corrupted input fence.";
+        return UNKNOWN_ERROR;
+    }
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->cancelBuffer(
+            static_cast<int32_t>(slot),
+            hFenceWrapper.getHandle());
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "cancelBuffer: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "cancelBuffer: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+int H2BGraphicBufferProducer::query(int what, int* value) {
+    int result{};
+    Return<void> transResult = mBase->query(
+            static_cast<int32_t>(what),
+            [&result, value](int32_t r, int32_t v) {
+                result = static_cast<int>(r);
+                *value = static_cast<int>(v);
+            });
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "query: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    return result;
+}
+
+status_t H2BGraphicBufferProducer::connect(
+        sp<IProducerListener> const& listener, int api,
+        bool producerControlledByApp, QueueBufferOutput* output) {
+    HConnectionType hConnectionType;
+    if (!b2h(api, &hConnectionType)) {
+        LOG(ERROR) << "connect: corrupted input connection type.";
+        return UNKNOWN_ERROR;
+    }
+    sp<HProducerListener> hListener = nullptr;
+    if (listener && listener->needsReleaseNotify()) {
+        hListener = new B2HProducerListener(listener);
+        if (!hListener) {
+            LOG(ERROR) << "connect: failed to wrap listener.";
+            return UNKNOWN_ERROR;
+        }
+    }
+
+    using HOutput = HGraphicBufferProducer::QueueBufferOutput;
+    bool converted{};
+    status_t bStatus{};
+    Return<void> transResult = mBase->connect(
+            hListener,
+            hConnectionType,
+            producerControlledByApp,
+            [&converted, &bStatus, output](
+                    HStatus hStatus,
+                    HOutput hOutput) {
+                converted = h2b(hStatus, &bStatus);
+                output->width = hOutput.width;
+                output->height = hOutput.height;
+                output->transformHint =
+                        static_cast<uint32_t>(hOutput.transformHint);
+                output->numPendingBuffers = hOutput.numPendingBuffers;
+                output->nextFrameNumber = hOutput.nextFrameNumber;
+                output->bufferReplaced = hOutput.bufferReplaced;
+            });
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "connect: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!converted) {
+        LOG(ERROR) << "connect: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+
+}
+
+status_t H2BGraphicBufferProducer::disconnect(int api, DisconnectMode mode) {
+    HConnectionType hConnectionType;
+    if (mode == DisconnectMode::AllLocal) {
+        hConnectionType = HConnectionType::CURRENTLY_CONNECTED;
+    } else if (!b2h(api, &hConnectionType)) {
+        LOG(ERROR) << "connect: corrupted input connection type.";
+        return UNKNOWN_ERROR;
+    }
+
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->disconnect(hConnectionType);
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "disconnect: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "disconnect: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::setSidebandStream(
+        sp<NativeHandle> const& stream) {
+    if (stream) {
+        LOG(INFO) << "setSidebandStream: not supported.";
+        return INVALID_OPERATION;
+    }
+    return OK;
+}
+
+void H2BGraphicBufferProducer::allocateBuffers(
+        uint32_t width, uint32_t height,
+        PixelFormat format, uint64_t usage) {
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->allocateBuffers(
+            width, height, static_cast<uint32_t>(format), usage);
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "allocateBuffer: transaction failed.";
+        return;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "allocateBuffer: corrupted transaction.";
+        return;
+    }
+}
+
+status_t H2BGraphicBufferProducer::allowAllocation(bool allow) {
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->allowAllocation(allow);
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "allowAllocation: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "allowAllocation: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::setGenerationNumber(
+        uint32_t generationNumber) {
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->setGenerationNumber(generationNumber);
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "setGenerationNumber: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "setGenerationNumber: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+String8 H2BGraphicBufferProducer::getConsumerName() const {
+    String8 bName;
+    Return<void> transResult = mBase->getConsumerName(
+            [&bName](hidl_string const& name) {
+                bName = name.c_str();
+            });
+    return bName;
+}
+
+status_t H2BGraphicBufferProducer::setSharedBufferMode(bool sharedBufferMode) {
+    if (sharedBufferMode) {
+        LOG(INFO) << "setSharedBufferMode: not supported.";
+        return INVALID_OPERATION;
+    }
+    return OK;
+}
+
+status_t H2BGraphicBufferProducer::setAutoRefresh(bool autoRefresh) {
+    if (autoRefresh) {
+        LOG(INFO) << "setAutoRefresh: not supported.";
+        return INVALID_OPERATION;
+    }
+    return OK;
+}
+
+status_t H2BGraphicBufferProducer::setDequeueTimeout(nsecs_t timeout) {
+    status_t bStatus{};
+    Return<HStatus> transResult = mBase->setDequeueTimeout(
+            static_cast<int64_t>(timeout));
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "setDequeueTimeout: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    if (!h2b(static_cast<HStatus>(transResult), &bStatus)) {
+        LOG(ERROR) << "setDequeueTimeout: corrupted transaction.";
+        return FAILED_TRANSACTION;
+    }
+    return bStatus;
+}
+
+status_t H2BGraphicBufferProducer::getLastQueuedBuffer(
+        sp<GraphicBuffer>*,
+        sp<BFence>*,
+        float[16]) {
+    LOG(INFO) << "getLastQueuedBuffer: not supported.";
+    return INVALID_OPERATION;
+}
+
+void H2BGraphicBufferProducer::getFrameTimestamps(FrameEventHistoryDelta*) {
+    LOG(INFO) << "getFrameTimestamps: not supported.";
+}
+
+status_t H2BGraphicBufferProducer::getUniqueId(uint64_t* outId) const {
+    Return<uint64_t> transResult = mBase->getUniqueId();
+    if (!transResult.isOk()) {
+        LOG(ERROR) << "getUniqueId: transaction failed.";
+        return FAILED_TRANSACTION;
+    }
+    *outId = static_cast<uint64_t>(transResult);
+    return OK;
+}
+
+status_t H2BGraphicBufferProducer::getConsumerUsage(uint64_t*) const {
+    LOG(INFO) << "getConsumerUsage: not supported.";
+    return INVALID_OPERATION;
+}
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
diff --git a/libs/gui/bufferqueue/2.0/H2BProducerListener.cpp b/libs/gui/bufferqueue/2.0/H2BProducerListener.cpp
new file mode 100644
index 0000000000..b81a357d63
--- /dev/null
+++ b/libs/gui/bufferqueue/2.0/H2BProducerListener.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2019 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "H2BProducerListener@2.0"
+
+#include <android-base/logging.h>
+
+#include <gui/bufferqueue/2.0/H2BProducerListener.h>
+#include <hidl/Status.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+using ::android::hardware::Return;
+
+H2BProducerListener::H2BProducerListener(sp<HProducerListener> const& base)
+      : CBase{base} {
+}
+
+void H2BProducerListener::onBufferReleased() {
+    if (mBase) {
+        Return<void> transResult = mBase->onBuffersReleased(1);
+        if (!transResult.isOk()) {
+            LOG(ERROR) << "onBuffersReleased: transaction failed.";
+        }
+    }
+}
+
+bool H2BProducerListener::needsReleaseNotify() {
+    return static_cast<bool>(mBase);
+}
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
diff --git a/libs/gui/bufferqueue/2.0/types.cpp b/libs/gui/bufferqueue/2.0/types.cpp
new file mode 100644
index 0000000000..a11051739f
--- /dev/null
+++ b/libs/gui/bufferqueue/2.0/types.cpp
@@ -0,0 +1,301 @@
+/*
+ * Copyright 2019 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 <cutils/native_handle.h>
+#include <gui/BufferQueueCore.h>
+#include <gui/IGraphicBufferProducer.h>
+#include <gui/bufferqueue/2.0/types.h>
+#include <system/window.h>
+#include <vndk/hardware_buffer.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+// Status
+// ======
+
+bool b2h(status_t from, HStatus* to,
+         bool* bufferNeedsReallocation, bool* releaseAllBuffers) {
+    switch (from) {
+    case OK:
+        *to = HStatus::OK; break;
+    case NO_MEMORY:
+        *to = HStatus::NO_MEMORY; break;
+    case NO_INIT:
+        *to = HStatus::NO_INIT; break;
+    case BAD_VALUE:
+        *to = HStatus::BAD_VALUE; break;
+    case DEAD_OBJECT:
+        *to = HStatus::DEAD_OBJECT; break;
+    case INVALID_OPERATION:
+        *to = HStatus::INVALID_OPERATION; break;
+    case TIMED_OUT:
+        *to = HStatus::TIMED_OUT; break;
+    case WOULD_BLOCK:
+        *to = HStatus::WOULD_BLOCK; break;
+    case UNKNOWN_ERROR:
+        *to = HStatus::UNKNOWN_ERROR; break;
+    default:
+        using BGBP = ::android::IGraphicBufferProducer;
+        status_t mask =
+                (bufferNeedsReallocation ? BGBP::BUFFER_NEEDS_REALLOCATION : 0)
+                | (releaseAllBuffers ? BGBP::RELEASE_ALL_BUFFERS : 0);
+        if (from & ~mask) {
+            *to = static_cast<HStatus>(from);
+        } else {
+            *to = HStatus::OK;
+            if (bufferNeedsReallocation) {
+                *bufferNeedsReallocation = from & BGBP::BUFFER_NEEDS_REALLOCATION;
+            }
+            if (releaseAllBuffers) {
+                *releaseAllBuffers = from & BGBP::RELEASE_ALL_BUFFERS;
+            }
+        }
+    }
+    return true;
+}
+
+bool h2b(HStatus from, status_t* to) {
+    switch (from) {
+    case HStatus::OK:
+        *to = OK; break;
+    case HStatus::NO_MEMORY:
+        *to = NO_MEMORY; break;
+    case HStatus::NO_INIT:
+        *to = NO_INIT; break;
+    case HStatus::BAD_VALUE:
+        *to = BAD_VALUE; break;
+    case HStatus::DEAD_OBJECT:
+        *to = DEAD_OBJECT; break;
+    case HStatus::INVALID_OPERATION:
+        *to = INVALID_OPERATION; break;
+    case HStatus::TIMED_OUT:
+        *to = TIMED_OUT; break;
+    case HStatus::WOULD_BLOCK:
+        *to = WOULD_BLOCK; break;
+    case HStatus::UNKNOWN_ERROR:
+        *to = UNKNOWN_ERROR; break;
+    default:
+        *to = static_cast<status_t>(from);
+    }
+    return true;
+}
+
+// Fence
+// =====
+
+HFenceWrapper::HFenceWrapper(native_handle_t* h) : mHandle{h} {
+}
+
+HFenceWrapper::~HFenceWrapper() {
+    native_handle_delete(mHandle);
+}
+
+HFenceWrapper& HFenceWrapper::set(native_handle_t* h) {
+    native_handle_delete(mHandle);
+    mHandle = h;
+    return *this;
+}
+
+HFenceWrapper& HFenceWrapper::operator=(native_handle_t* h) {
+    return set(h);
+}
+
+hidl_handle HFenceWrapper::getHandle() const {
+    return hidl_handle{mHandle};
+}
+
+HFenceWrapper::operator hidl_handle() const {
+    return getHandle();
+}
+
+bool b2h(sp<BFence> const& from, HFenceWrapper* to) {
+    if (!from) {
+        to->set(nullptr);
+        return true;
+    }
+    int fenceFd = from->get();
+    if (fenceFd == -1) {
+        to->set(nullptr);
+        return true;
+    }
+    native_handle_t* nh = native_handle_create(1, 0);
+    if (!nh) {
+        return false;
+    }
+    nh->data[0] = fenceFd;
+    to->set(nh);
+    return true;
+}
+
+bool h2b(native_handle_t const* from, sp<BFence>* to) {
+    if (!from || from->numFds == 0) {
+        *to = new ::android::Fence();
+        return true;
+    }
+    if (from->numFds != 1 || from->numInts != 0) {
+        return false;
+    }
+    *to = new BFence(dup(from->data[0]));
+    return true;
+}
+
+// ConnectionType
+// ==============
+
+bool b2h(int from, HConnectionType* to) {
+    *to = static_cast<HConnectionType>(from);
+    switch (from) {
+    case BufferQueueCore::CURRENTLY_CONNECTED_API:
+        *to = HConnectionType::CURRENTLY_CONNECTED; break;
+    case NATIVE_WINDOW_API_EGL:
+        *to = HConnectionType::EGL; break;
+    case NATIVE_WINDOW_API_CPU:
+        *to = HConnectionType::CPU; break;
+    case NATIVE_WINDOW_API_MEDIA:
+        *to = HConnectionType::MEDIA; break;
+    case NATIVE_WINDOW_API_CAMERA:
+        *to = HConnectionType::CAMERA; break;
+    }
+    return true;
+}
+
+bool h2b(HConnectionType from, int* to) {
+    *to = static_cast<int>(from);
+    switch (from) {
+    case HConnectionType::CURRENTLY_CONNECTED:
+        *to = BufferQueueCore::CURRENTLY_CONNECTED_API; break;
+    case HConnectionType::EGL:
+        *to = NATIVE_WINDOW_API_EGL; break;
+    case HConnectionType::CPU:
+        *to = NATIVE_WINDOW_API_CPU; break;
+    case HConnectionType::MEDIA:
+        *to = NATIVE_WINDOW_API_MEDIA; break;
+    case HConnectionType::CAMERA:
+        *to = NATIVE_WINDOW_API_CAMERA; break;
+    }
+    return true;
+}
+
+// Rect
+// ====
+
+bool b2h(BRect const& from, HRect* to) {
+    BRect* dst = reinterpret_cast<BRect*>(to->data());
+    dst->left = from.left;
+    dst->top = from.top;
+    dst->right = from.right;
+    dst->bottom = from.bottom;
+    return true;
+}
+
+bool h2b(HRect const& from, BRect* to) {
+    BRect const* src = reinterpret_cast<BRect const*>(from.data());
+    to->left = src->left;
+    to->top = src->top;
+    to->right = src->right;
+    to->bottom = src->bottom;
+    return true;
+}
+
+// Region
+// ======
+
+bool b2h(BRegion const& from, HRegion* to) {
+    size_t numRects;
+    BRect const* rectArray = from.getArray(&numRects);
+    to->resize(numRects);
+    for (size_t i = 0; i < numRects; ++i) {
+        if (!b2h(rectArray[i], &(*to)[i])) {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool h2b(HRegion const& from, BRegion* to) {
+    if (from.size() > 0) {
+        BRect bRect;
+        if (!h2b(from[0], &bRect)) {
+            return false;
+        }
+        to->set(bRect);
+        for (size_t i = 1; i < from.size(); ++i) {
+            if (!h2b(from[i], &bRect)) {
+                return false;
+            }
+            to->addRectUnchecked(
+                    static_cast<int>(bRect.left),
+                    static_cast<int>(bRect.top),
+                    static_cast<int>(bRect.right),
+                    static_cast<int>(bRect.bottom));
+        }
+    } else {
+        to->clear();
+    }
+    return true;
+}
+
+// GraphicBuffer
+// =============
+
+// The handle is not cloned. Its lifetime is tied to the original GraphicBuffer.
+bool b2h(sp<GraphicBuffer> const& from, HardwareBuffer* to,
+         uint32_t* toGenerationNumber) {
+    if (!from) {
+        return false;
+    }
+    AHardwareBuffer* hwBuffer = from->toAHardwareBuffer();
+    to->nativeHandle.setTo(
+          const_cast<native_handle_t*>(
+              AHardwareBuffer_getNativeHandle(hwBuffer)),
+          false);
+    AHardwareBuffer_describe(
+            hwBuffer,
+            reinterpret_cast<AHardwareBuffer_Desc*>(to->description.data()));
+    if (toGenerationNumber) {
+        *toGenerationNumber = from->getGenerationNumber();
+    }
+    return true;
+}
+
+// The handle is cloned.
+bool h2b(HardwareBuffer const& from, sp<GraphicBuffer>* to) {
+    AHardwareBuffer_Desc const* desc =
+            reinterpret_cast<AHardwareBuffer_Desc const*>(
+            from.description.data());
+    native_handle_t const* handle = from.nativeHandle;
+    AHardwareBuffer* hwBuffer;
+    if (AHardwareBuffer_createFromHandle(
+            desc, handle, AHARDWAREBUFFER_CREATE_FROM_HANDLE_METHOD_CLONE,
+            &hwBuffer) != OK) {
+        return false;
+    }
+    *to = GraphicBuffer::fromAHardwareBuffer(hwBuffer);
+    return true;
+}
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
diff --git a/libs/gui/include/gui/IGraphicBufferProducer.h b/libs/gui/include/gui/IGraphicBufferProducer.h
index 8ff8d81cf6..2f538adebc 100644
--- a/libs/gui/include/gui/IGraphicBufferProducer.h
+++ b/libs/gui/include/gui/IGraphicBufferProducer.h
@@ -35,6 +35,7 @@
 
 #include <hidl/HybridInterface.h>
 #include <android/hardware/graphics/bufferqueue/1.0/IGraphicBufferProducer.h>
+#include <android/hardware/graphics/bufferqueue/2.0/IGraphicBufferProducer.h>
 
 namespace android {
 // ----------------------------------------------------------------------------
@@ -42,8 +43,6 @@ namespace android {
 class IProducerListener;
 class NativeHandle;
 class Surface;
-typedef ::android::hardware::graphics::bufferqueue::V1_0::IGraphicBufferProducer
-        HGraphicBufferProducer;
 
 /*
  * This class defines the Binder IPC interface for the producer side of
@@ -62,7 +61,16 @@ typedef ::android::hardware::graphics::bufferqueue::V1_0::IGraphicBufferProducer
 class IGraphicBufferProducer : public IInterface
 {
 public:
-    DECLARE_HYBRID_META_INTERFACE(GraphicBufferProducer, HGraphicBufferProducer)
+    using HGraphicBufferProducerV1_0 =
+            ::android::hardware::graphics::bufferqueue::V1_0::
+            IGraphicBufferProducer;
+    using HGraphicBufferProducerV2_0 =
+            ::android::hardware::graphics::bufferqueue::V2_0::
+            IGraphicBufferProducer;
+
+    DECLARE_HYBRID_META_INTERFACE(GraphicBufferProducer,
+                                  HGraphicBufferProducerV1_0,
+                                  HGraphicBufferProducerV2_0)
 
     enum {
         // A flag returned by dequeueBuffer when the client needs to call
@@ -366,7 +374,6 @@ public:
         const HdrMetadata& getHdrMetadata() const { return hdrMetadata; }
         void setHdrMetadata(const HdrMetadata& metadata) { hdrMetadata = metadata; }
 
-    private:
         int64_t timestamp{0};
         int isAutoTimestamp{0};
         android_dataspace dataSpace{HAL_DATASPACE_UNKNOWN};
diff --git a/libs/gui/include/gui/IProducerListener.h b/libs/gui/include/gui/IProducerListener.h
index e808bd3bc3..a13d8e4945 100644
--- a/libs/gui/include/gui/IProducerListener.h
+++ b/libs/gui/include/gui/IProducerListener.h
@@ -17,8 +17,10 @@
 #ifndef ANDROID_GUI_IPRODUCERLISTENER_H
 #define ANDROID_GUI_IPRODUCERLISTENER_H
 
+#include <android/hardware/graphics/bufferqueue/1.0/IProducerListener.h>
+#include <android/hardware/graphics/bufferqueue/2.0/IProducerListener.h>
 #include <binder/IInterface.h>
-
+#include <hidl/HybridInterface.h>
 #include <utils/RefBase.h>
 
 namespace android {
@@ -47,7 +49,14 @@ public:
 class IProducerListener : public ProducerListener, public IInterface
 {
 public:
-    DECLARE_META_INTERFACE(ProducerListener)
+    using HProducerListener1 =
+            ::android::hardware::graphics::bufferqueue::V1_0::IProducerListener;
+    using HProducerListener2 =
+            ::android::hardware::graphics::bufferqueue::V2_0::IProducerListener;
+    DECLARE_HYBRID_META_INTERFACE(
+            ProducerListener,
+            HProducerListener1,
+            HProducerListener2)
 };
 
 class BnProducerListener : public BnInterface<IProducerListener>
diff --git a/libs/gui/include/gui/bufferqueue/1.0/H2BProducerListener.h b/libs/gui/include/gui/bufferqueue/1.0/H2BProducerListener.h
new file mode 100644
index 0000000000..211fdd5351
--- /dev/null
+++ b/libs/gui/include/gui/bufferqueue/1.0/H2BProducerListener.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2019 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.
+ */
+
+#ifndef ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V1_0_H2BPRODUCERLISTENER_H
+#define ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V1_0_H2BPRODUCERLISTENER_H
+
+#include <android/hardware/graphics/bufferqueue/1.0/IProducerListener.h>
+#include <gui/IProducerListener.h>
+#include <hidl/HybridInterface.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V1_0 {
+namespace utils {
+
+using HProducerListener = ::android::hardware::graphics::bufferqueue::V1_0::
+        IProducerListener;
+
+using BProducerListener = ::android::IProducerListener;
+
+class H2BProducerListener
+      : public H2BConverter<HProducerListener, BnProducerListener> {
+public:
+    H2BProducerListener(sp<HProducerListener> const& base);
+    virtual void onBufferReleased() override;
+    virtual bool needsReleaseNotify() override;
+};
+
+}  // namespace utils
+}  // namespace V1_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V1_0_H2BPRODUCERLISTENER_H
+
diff --git a/libs/gui/include/gui/bufferqueue/2.0/B2HGraphicBufferProducer.h b/libs/gui/include/gui/bufferqueue/2.0/B2HGraphicBufferProducer.h
new file mode 100644
index 0000000000..1c58167752
--- /dev/null
+++ b/libs/gui/include/gui/bufferqueue/2.0/B2HGraphicBufferProducer.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2019 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.
+ */
+
+#ifndef ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_B2HGRAPHICBUFFERPRODUCER_H
+#define ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_B2HGRAPHICBUFFERPRODUCER_H
+
+#include <android/hardware/graphics/bufferqueue/2.0/IGraphicBufferProducer.h>
+#include <gui/IGraphicBufferProducer.h>
+#include <gui/bufferqueue/2.0/types.h>
+#include <hidl/HidlSupport.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+using HGraphicBufferProducer =
+        ::android::hardware::graphics::bufferqueue::V2_0::
+        IGraphicBufferProducer;
+using BGraphicBufferProducer =
+        ::android::
+        IGraphicBufferProducer;
+using HProducerListener =
+        ::android::hardware::graphics::bufferqueue::V2_0::
+        IProducerListener;
+
+using ::android::hardware::Return;
+using ::android::hardware::hidl_handle;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+
+using ::android::hardware::graphics::common::V1_2::HardwareBuffer;
+
+class B2HGraphicBufferProducer : public HGraphicBufferProducer {
+public:
+    B2HGraphicBufferProducer(sp<BGraphicBufferProducer> const& base);
+
+    virtual Return<HStatus> setMaxDequeuedBufferCount(
+            int32_t maxDequeuedBuffers) override;
+
+    virtual Return<void> requestBuffer(
+            int32_t slot,
+            requestBuffer_cb _hidl_cb) override;
+
+    virtual Return<HStatus> setAsyncMode(bool async) override;
+
+    virtual Return<void> dequeueBuffer(
+            DequeueBufferInput const& input,
+            dequeueBuffer_cb _hidl_cb) override;
+
+    virtual Return<HStatus> detachBuffer(int32_t slot) override;
+
+    virtual Return<void> detachNextBuffer(
+            detachNextBuffer_cb _hidl_cb) override;
+
+    virtual Return<void> attachBuffer(
+            HardwareBuffer const& buffer,
+            uint32_t generationNumber,
+            attachBuffer_cb _hidl_cb) override;
+
+    virtual Return<void> queueBuffer(
+            int32_t slot,
+            QueueBufferInput const& input,
+            queueBuffer_cb _hidl_cb) override;
+
+    virtual Return<HStatus> cancelBuffer(
+            int32_t slot,
+            hidl_handle const& fence) override;
+
+    virtual Return<void> query(int32_t what, query_cb _hidl_cb) override;
+
+    virtual Return<void> connect(
+            sp<HProducerListener> const& listener,
+            HConnectionType api,
+            bool producerControlledByApp,
+            connect_cb _hidl_cb) override;
+
+    virtual Return<HStatus> disconnect(HConnectionType api) override;
+
+    virtual Return<HStatus> allocateBuffers(
+            uint32_t width, uint32_t height,
+            uint32_t format, uint64_t usage) override;
+
+    virtual Return<HStatus> allowAllocation(bool allow) override;
+
+    virtual Return<HStatus> setGenerationNumber(uint32_t generationNumber) override;
+
+    virtual Return<HStatus> setDequeueTimeout(int64_t timeoutNs) override;
+
+    virtual Return<uint64_t> getUniqueId() override;
+
+    virtual Return<void> getConsumerName(getConsumerName_cb _hidl_cb) override;
+
+protected:
+    sp<BGraphicBufferProducer> mBase;
+};
+
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_B2HGRAPHICBUFFERPRODUCER_H
diff --git a/libs/gui/include/gui/bufferqueue/2.0/B2HProducerListener.h b/libs/gui/include/gui/bufferqueue/2.0/B2HProducerListener.h
new file mode 100644
index 0000000000..b48a4736ad
--- /dev/null
+++ b/libs/gui/include/gui/bufferqueue/2.0/B2HProducerListener.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2019 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.
+ */
+
+#ifndef ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_B2HPRODUCERLISTENER_H
+#define ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_B2HPRODUCERLISTENER_H
+
+#include <android/hidl/base/1.0/IBase.h>
+#include <binder/IBinder.h>
+#include <gui/IProducerListener.h>
+#include <hidl/Status.h>
+
+#include <android/hardware/graphics/bufferqueue/2.0/IProducerListener.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+using ::android::hardware::Return;
+
+using HProducerListener = ::android::hardware::graphics::bufferqueue::V2_0::
+        IProducerListener;
+
+using BProducerListener = ::android::IProducerListener;
+
+struct B2HProducerListener : public HProducerListener {
+    explicit B2HProducerListener(sp<BProducerListener> const& base);
+    Return<void> onBuffersReleased(uint32_t count) override;
+protected:
+    sp<BProducerListener> mBase;
+    bool mNeedsReleaseNotify;
+};
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_B2HPRODUCERLISTENER_H
+
diff --git a/libs/gui/include/gui/bufferqueue/2.0/H2BGraphicBufferProducer.h b/libs/gui/include/gui/bufferqueue/2.0/H2BGraphicBufferProducer.h
new file mode 100644
index 0000000000..7dd16172cf
--- /dev/null
+++ b/libs/gui/include/gui/bufferqueue/2.0/H2BGraphicBufferProducer.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2019 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.
+ */
+
+#ifndef ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_H2BGRAPHICBUFFERPRODUCER_H
+#define ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_H2BGRAPHICBUFFERPRODUCER_H
+
+#include <gui/IGraphicBufferProducer.h>
+#include <gui/IProducerListener.h>
+#include <hidl/HybridInterface.h>
+#include <ui/Fence.h>
+
+#include <android/hardware/graphics/bufferqueue/2.0/IGraphicBufferProducer.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+using ::android::BnGraphicBufferProducer;
+using ::android::IProducerListener;
+using Fence = ::android::Fence;
+
+using HGraphicBufferProducer =
+        ::android::hardware::graphics::bufferqueue::V2_0::
+        IGraphicBufferProducer;
+using HProducerListener =
+        ::android::hardware::graphics::bufferqueue::V2_0::
+        IProducerListener;
+using BGraphicBufferProducer =
+        ::android::IGraphicBufferProducer;
+
+struct H2BGraphicBufferProducer
+      : public ::android::H2BConverter<HGraphicBufferProducer,
+                                       BnGraphicBufferProducer> {
+    explicit H2BGraphicBufferProducer(
+            sp<HGraphicBufferProducer> const& base) : CBase(base) {}
+
+    virtual status_t requestBuffer(int slot, sp<GraphicBuffer>* buf) override;
+    virtual status_t setMaxDequeuedBufferCount(int maxDequeuedBuffers) override;
+    virtual status_t setAsyncMode(bool async) override;
+    virtual status_t dequeueBuffer(
+            int* slot, sp<Fence>* fence,
+            uint32_t width, uint32_t height,
+            PixelFormat format, uint64_t usage,
+            uint64_t* outBufferAge,
+            FrameEventHistoryDelta* outTimestamps) override;
+    virtual status_t detachBuffer(int slot) override;
+    virtual status_t detachNextBuffer(
+            sp<GraphicBuffer>* outBuffer,
+            sp<Fence>* outFence) override;
+    virtual status_t attachBuffer(
+            int* outSlot,
+            sp<GraphicBuffer> const& buffer) override;
+    virtual status_t queueBuffer(
+            int slot,
+            QueueBufferInput const& input,
+            QueueBufferOutput* output) override;
+    virtual status_t cancelBuffer(int slot, sp<Fence> const& fence) override;
+    virtual int query(int what, int* value) override;
+    virtual status_t connect(
+            sp<IProducerListener> const& listener,
+            int api,
+            bool producerControlledByApp,
+            QueueBufferOutput* output) override;
+    virtual status_t disconnect(
+            int api,
+            DisconnectMode mode = DisconnectMode::Api) override;
+    virtual status_t setSidebandStream(sp<NativeHandle> const& stream) override;
+    virtual void allocateBuffers(
+            uint32_t width, uint32_t height,
+            PixelFormat format, uint64_t usage) override;
+    virtual status_t allowAllocation(bool allow) override;
+    virtual status_t setGenerationNumber(uint32_t generationNumber) override;
+    virtual String8 getConsumerName() const override;
+    virtual status_t setSharedBufferMode(bool sharedBufferMode) override;
+    virtual status_t setAutoRefresh(bool autoRefresh) override;
+    virtual status_t setDequeueTimeout(nsecs_t timeout) override;
+    virtual status_t getLastQueuedBuffer(sp<GraphicBuffer>* outBuffer,
+          sp<Fence>* outFence, float outTransformMatrix[16]) override;
+    virtual void getFrameTimestamps(FrameEventHistoryDelta* outDelta) override;
+    virtual status_t getUniqueId(uint64_t* outId) const override;
+    virtual status_t getConsumerUsage(uint64_t* outUsage) const override;
+};
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_H2BGRAPHICBUFFERPRODUCER_H
diff --git a/libs/gui/include/gui/bufferqueue/2.0/H2BProducerListener.h b/libs/gui/include/gui/bufferqueue/2.0/H2BProducerListener.h
new file mode 100644
index 0000000000..898920bf8a
--- /dev/null
+++ b/libs/gui/include/gui/bufferqueue/2.0/H2BProducerListener.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2019 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.
+ */
+
+#ifndef ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_H2BPRODUCERLISTENER_H
+#define ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_H2BPRODUCERLISTENER_H
+
+#include <android/hardware/graphics/bufferqueue/2.0/IProducerListener.h>
+#include <gui/IProducerListener.h>
+#include <hidl/HybridInterface.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+using HProducerListener = ::android::hardware::graphics::bufferqueue::V2_0::
+        IProducerListener;
+
+using BProducerListener = ::android::IProducerListener;
+
+class H2BProducerListener
+      : public H2BConverter<HProducerListener, BnProducerListener> {
+public:
+    H2BProducerListener(sp<HProducerListener> const& base);
+    virtual void onBufferReleased() override;
+    virtual bool needsReleaseNotify() override;
+};
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_H2BPRODUCERLISTENER_H
+
diff --git a/libs/gui/include/gui/bufferqueue/2.0/types.h b/libs/gui/include/gui/bufferqueue/2.0/types.h
new file mode 100644
index 0000000000..62176ce2ef
--- /dev/null
+++ b/libs/gui/include/gui/bufferqueue/2.0/types.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2019 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.
+ */
+
+#ifndef ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_TYPES_H
+#define ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_TYPES_H
+
+#include <android/hardware/graphics/bufferqueue/2.0/types.h>
+#include <android/hardware/graphics/common/1.2/types.h>
+#include <hidl/HidlSupport.h>
+#include <ui/Fence.h>
+#include <ui/GraphicBuffer.h>
+
+namespace android {
+namespace hardware {
+namespace graphics {
+namespace bufferqueue {
+namespace V2_0 {
+namespace utils {
+
+// Status
+// ======
+
+using HStatus = ::android::hardware::graphics::bufferqueue::V2_0::
+        Status;
+
+// A status_t value may have flags encoded. These flags are decoded into boolean
+// values if their corresponding output pointers are not null.
+bool b2h(status_t from, HStatus* to,
+         bool* bufferNeedsReallocation = nullptr,
+         bool* releaseAllBuffers = nullptr);
+// Simple 1-to-1 mapping. If BUFFER_NEEDS_REALLOCATION or RELEASE_ALL_BUFFERS
+// needs to be added, it must be done manually afterwards.
+bool h2b(HStatus from, status_t* to);
+
+// Fence
+// =====
+
+using BFence = ::android::Fence;
+// This class manages the lifetime of a copied handle. Its destructor calls
+// native_handle_delete() but not native_handle_close().
+struct HFenceWrapper {
+    HFenceWrapper() = default;
+    // Sets mHandle to a new value.
+    HFenceWrapper(native_handle_t* h);
+    // Deletes mHandle without closing.
+    ~HFenceWrapper();
+    // Deletes mHandle without closing, then sets mHandle to a new value.
+    HFenceWrapper& set(native_handle_t* h);
+    HFenceWrapper& operator=(native_handle_t* h);
+    // Returns a non-owning hidl_handle pointing to mHandle.
+    hidl_handle getHandle() const;
+    operator hidl_handle() const;
+protected:
+    native_handle_t* mHandle{nullptr};
+};
+
+// Does not clone the fd---only copy the fd. The returned HFenceWrapper should
+// not outlive the input Fence object.
+bool b2h(sp<BFence> const& from, HFenceWrapper* to);
+// Clones the fd and puts it in a new Fence object.
+bool h2b(native_handle_t const* from, sp<BFence>* to);
+
+// ConnectionType
+// ==============
+
+using HConnectionType = ::android::hardware::graphics::bufferqueue::V2_0::
+        ConnectionType;
+
+bool b2h(int from, HConnectionType* to);
+bool h2b(HConnectionType from, int* to);
+
+// Rect
+// ====
+
+using BRect = ::android::Rect;
+using HRect = ::android::hardware::graphics::common::V1_2::Rect;
+
+bool b2h(BRect const& from, HRect* to);
+bool h2b(HRect const& from, BRect* to);
+
+// Region
+// ======
+
+using BRegion = ::android::Region;
+using HRegion = ::android::hardware::hidl_vec<HRect>;
+
+bool b2h(BRegion const& from, HRegion* to);
+bool h2b(HRegion const& from, BRegion* to);
+
+// GraphicBuffer
+// =============
+
+using HardwareBuffer = ::android::hardware::graphics::common::V1_2::
+        HardwareBuffer;
+using HardwareBufferDescription = ::android::hardware::graphics::common::V1_2::
+        HardwareBufferDescription;
+
+// Does not clone the handle. The returned HardwareBuffer should not outlive the
+// input GraphicBuffer. Note that HardwareBuffer does not carry the generation
+// number, so this function needs another output argument.
+bool b2h(sp<GraphicBuffer> const& from, HardwareBuffer* to,
+         uint32_t* toGenerationNumber = nullptr);
+// Clones the handle and creates a new GraphicBuffer from the cloned handle.
+// Note that the generation number of the GraphicBuffer has to be set manually
+// afterwards because HardwareBuffer does not have such information.
+bool h2b(HardwareBuffer const& from, sp<GraphicBuffer>* to);
+
+}  // namespace utils
+}  // namespace V2_0
+}  // namespace bufferqueue
+}  // namespace graphics
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GRAPHICS_BUFFERQUEUE_V2_0_TYPES_H
+
diff --git a/libs/nativewindow/AHardwareBuffer.cpp b/libs/nativewindow/AHardwareBuffer.cpp
index 994e953e76..52fc9d5bad 100644
--- a/libs/nativewindow/AHardwareBuffer.cpp
+++ b/libs/nativewindow/AHardwareBuffer.cpp
@@ -636,11 +636,11 @@ uint64_t AHardwareBuffer_convertFromGrallocUsageBits(uint64_t usage) {
 }
 
 const GraphicBuffer* AHardwareBuffer_to_GraphicBuffer(const AHardwareBuffer* buffer) {
-    return reinterpret_cast<const GraphicBuffer*>(buffer);
+    return GraphicBuffer::fromAHardwareBuffer(buffer);
 }
 
 GraphicBuffer* AHardwareBuffer_to_GraphicBuffer(AHardwareBuffer* buffer) {
-    return reinterpret_cast<GraphicBuffer*>(buffer);
+    return GraphicBuffer::fromAHardwareBuffer(buffer);
 }
 
 const ANativeWindowBuffer* AHardwareBuffer_to_ANativeWindowBuffer(const AHardwareBuffer* buffer) {
@@ -652,7 +652,7 @@ ANativeWindowBuffer* AHardwareBuffer_to_ANativeWindowBuffer(AHardwareBuffer* buf
 }
 
 AHardwareBuffer* AHardwareBuffer_from_GraphicBuffer(GraphicBuffer* buffer) {
-    return reinterpret_cast<AHardwareBuffer*>(buffer);
+    return buffer->toAHardwareBuffer();
 }
 
 } // namespace android
diff --git a/libs/nativewindow/Android.bp b/libs/nativewindow/Android.bp
index d8478848cb..27ab482676 100644
--- a/libs/nativewindow/Android.bp
+++ b/libs/nativewindow/Android.bp
@@ -24,7 +24,7 @@ ndk_headers {
 cc_library_headers {
     name: "libnativewindow_headers",
     export_include_dirs: ["include"],
-    vendor_available: false,
+    vendor_available: true,
 }
 
 ndk_library {
diff --git a/libs/ui/Android.bp b/libs/ui/Android.bp
index 4ca1781be1..e521b613a0 100644
--- a/libs/ui/Android.bp
+++ b/libs/ui/Android.bp
@@ -124,7 +124,6 @@ cc_library_shared {
             exclude_header_libs: [
                 "libbufferhub_headers",
                 "libdvr_headers",
-                "libnativewindow_headers",
             ],
             exclude_shared_libs: [
                 "android.frameworks.bufferhub@1.0",
@@ -152,6 +151,7 @@ cc_library_shared {
     export_header_lib_headers: [
         "libbase_headers",
         "libnativebase_headers",
+        "libnativewindow_headers",
         "libhardware_headers",
         "libui_headers",
     ],
diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index 79958ece9e..f800627ef7 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -49,6 +49,22 @@ sp<GraphicBuffer> GraphicBuffer::from(ANativeWindowBuffer* anwb) {
     return static_cast<GraphicBuffer *>(anwb);
 }
 
+GraphicBuffer* GraphicBuffer::fromAHardwareBuffer(AHardwareBuffer* buffer) {
+    return reinterpret_cast<GraphicBuffer*>(buffer);
+}
+
+GraphicBuffer const* GraphicBuffer::fromAHardwareBuffer(AHardwareBuffer const* buffer) {
+    return reinterpret_cast<GraphicBuffer const*>(buffer);
+}
+
+AHardwareBuffer* GraphicBuffer::toAHardwareBuffer() {
+    return reinterpret_cast<AHardwareBuffer*>(this);
+}
+
+AHardwareBuffer const* GraphicBuffer::toAHardwareBuffer() const {
+    return reinterpret_cast<AHardwareBuffer const*>(this);
+}
+
 GraphicBuffer::GraphicBuffer()
     : BASE(), mOwner(ownData), mBufferMapper(GraphicBufferMapper::get()),
       mInitCheck(NO_ERROR), mId(getUniqueId()), mGenerationNumber(0)
diff --git a/libs/ui/include/ui/Fence.h b/libs/ui/include/ui/Fence.h
index ec67fa972c..6efecd3c0e 100644
--- a/libs/ui/include/ui/Fence.h
+++ b/libs/ui/include/ui/Fence.h
@@ -99,6 +99,12 @@ public:
     // be returned and errno will indicate the problem.
     int dup() const;
 
+    // Return the underlying file descriptor without giving up ownership. The
+    // returned file descriptor is only valid for as long as the owning Fence
+    // object lives. (If the situation is unclear, dup() is always a safer
+    // option.)
+    int get() const { return mFenceFd.get(); }
+
     // getSignalTime returns the system monotonic clock time at which the
     // fence transitioned to the signaled state.  If the fence is not signaled
     // then SIGNAL_TIME_PENDING is returned.  If the fence is invalid or if an
diff --git a/libs/ui/include/ui/GraphicBuffer.h b/libs/ui/include/ui/GraphicBuffer.h
index 4d4ee68194..e0c655813d 100644
--- a/libs/ui/include/ui/GraphicBuffer.h
+++ b/libs/ui/include/ui/GraphicBuffer.h
@@ -22,6 +22,7 @@
 
 #include <string>
 
+#include <android/hardware_buffer.h>
 #include <ui/ANativeObjectBase.h>
 #include <ui/PixelFormat.h>
 #include <ui/Rect.h>
@@ -78,6 +79,10 @@ public:
 
     static sp<GraphicBuffer> from(ANativeWindowBuffer *);
 
+    static GraphicBuffer* fromAHardwareBuffer(AHardwareBuffer*);
+    static GraphicBuffer const* fromAHardwareBuffer(AHardwareBuffer const*);
+    AHardwareBuffer* toAHardwareBuffer();
+    AHardwareBuffer const* toAHardwareBuffer() const;
 
     // Create a GraphicBuffer to be unflatten'ed into or be reallocated.
     GraphicBuffer();