diff --git a/camera/Android.bp b/camera/Android.bp
index ea7259a..fa36bb3 100644
--- a/camera/Android.bp
+++ b/camera/Android.bp
@@ -40,6 +40,7 @@
         "ICameraRecordingProxy.cpp",
         "ICameraRecordingProxyListener.cpp",
         "camera2/CaptureRequest.cpp",
+        "camera2/ConcurrentCamera.cpp",
         "camera2/OutputConfiguration.cpp",
         "camera2/SessionConfiguration.cpp",
         "camera2/SubmitInfo.cpp",
@@ -66,7 +67,7 @@
          "include",
          "include/camera"
     ],
-    export_shared_lib_headers: ["libcamera_metadata"],
+    export_shared_lib_headers: ["libcamera_metadata", "libnativewindow", "libgui"],
 
     cflags: [
         "-Werror",
diff --git a/camera/aidl/android/hardware/ICameraService.aidl b/camera/aidl/android/hardware/ICameraService.aidl
index 62dbb5e..833893e 100644
--- a/camera/aidl/android/hardware/ICameraService.aidl
+++ b/camera/aidl/android/hardware/ICameraService.aidl
@@ -22,6 +22,8 @@
 import android.hardware.camera2.ICameraDeviceCallbacks;
 import android.hardware.camera2.params.VendorTagDescriptor;
 import android.hardware.camera2.params.VendorTagDescriptorCache;
+import android.hardware.camera2.utils.ConcurrentCameraIdCombination;
+import android.hardware.camera2.utils.CameraIdAndSessionConfiguration;
 import android.hardware.camera2.impl.CameraMetadataNative;
 import android.hardware.ICameraServiceListener;
 import android.hardware.CameraInfo;
@@ -114,6 +116,25 @@
     CameraStatus[] addListener(ICameraServiceListener listener);
 
     /**
+     * Get a list of combinations of camera ids which support concurrent streaming.
+     *
+     */
+    ConcurrentCameraIdCombination[] getConcurrentStreamingCameraIds();
+
+    /**
+      * Check whether a particular set of session configurations are concurrently supported by the
+      * corresponding camera ids.
+      *
+      * @param sessions the set of camera id and session configuration pairs to be queried.
+      * @return true  - the set of concurrent camera id and stream combinations is supported.
+      *         false - the set of concurrent camera id and stream combinations is not supported
+      *                 OR the method was called with a set of camera ids not returned by
+      *                 getConcurrentMultiStreamingCameraIds().
+      */
+    boolean isConcurrentSessionConfigurationSupported(
+            in CameraIdAndSessionConfiguration[] sessions);
+
+    /**
      * Remove listener for changes to camera device and flashlight state.
      */
     void removeListener(ICameraServiceListener listener);
diff --git a/camera/aidl/android/hardware/camera2/utils/CameraIdAndSessionConfiguration.aidl b/camera/aidl/android/hardware/camera2/utils/CameraIdAndSessionConfiguration.aidl
new file mode 100644
index 0000000..ca89ad8
--- /dev/null
+++ b/camera/aidl/android/hardware/camera2/utils/CameraIdAndSessionConfiguration.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2020 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 android.hardware.camera2.utils;
+
+/** @hide */
+parcelable CameraIdAndSessionConfiguration cpp_header "camera/camera2/ConcurrentCamera.h";
diff --git a/camera/aidl/android/hardware/camera2/utils/ConcurrentCameraIdCombination.aidl b/camera/aidl/android/hardware/camera2/utils/ConcurrentCameraIdCombination.aidl
new file mode 100644
index 0000000..4b35c31
--- /dev/null
+++ b/camera/aidl/android/hardware/camera2/utils/ConcurrentCameraIdCombination.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2020 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 android.hardware.camera2.utils;
+
+/** @hide */
+parcelable ConcurrentCameraIdCombination cpp_header "camera/camera2/ConcurrentCamera.h";
diff --git a/camera/camera2/ConcurrentCamera.cpp b/camera/camera2/ConcurrentCamera.cpp
new file mode 100644
index 0000000..01a695c
--- /dev/null
+++ b/camera/camera2/ConcurrentCamera.cpp
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2020 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 "ConcurrentCamera"
+#include <utils/Log.h>
+#include <utils/String16.h>
+
+#include <camera/camera2/ConcurrentCamera.h>
+
+#include <binder/Parcel.h>
+
+namespace android {
+namespace hardware {
+namespace camera2 {
+namespace utils {
+
+ConcurrentCameraIdCombination::ConcurrentCameraIdCombination() = default;
+
+ConcurrentCameraIdCombination::ConcurrentCameraIdCombination(
+        std::vector<std::string> &&combination) : mConcurrentCameraIds(std::move(combination)) { }
+
+ConcurrentCameraIdCombination::~ConcurrentCameraIdCombination() = default;
+
+status_t ConcurrentCameraIdCombination::readFromParcel(const android::Parcel* parcel) {
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+    status_t err = OK;
+    mConcurrentCameraIds.clear();
+    int32_t cameraIdCount = 0;
+    if ((err = parcel->readInt32(&cameraIdCount)) != OK) {
+        ALOGE("%s: Failed to read the camera id count from parcel: %d", __FUNCTION__, err);
+        return err;
+    }
+    for (int32_t i = 0; i < cameraIdCount; i++) {
+        String16 id;
+        if ((err = parcel->readString16(&id)) != OK) {
+            ALOGE("%s: Failed to read camera id!", __FUNCTION__);
+            return err;
+        }
+        mConcurrentCameraIds.push_back(std::string(String8(id).string()));
+    }
+    return OK;
+}
+
+status_t ConcurrentCameraIdCombination::writeToParcel(android::Parcel* parcel) const {
+
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    status_t err = OK;
+
+    if ((err = parcel->writeInt32(mConcurrentCameraIds.size())) != OK) {
+        ALOGE("%s: Failed to write the camera id count to parcel: %d", __FUNCTION__, err);
+        return err;
+    }
+
+    for (const auto &it : mConcurrentCameraIds) {
+        if ((err = parcel->writeString16(String16(it.c_str()))) != OK) {
+            ALOGE("%s: Failed to write the camera id string to parcel: %d", __FUNCTION__, err);
+            return err;
+        }
+    }
+    return OK;
+}
+
+CameraIdAndSessionConfiguration::CameraIdAndSessionConfiguration() = default;
+CameraIdAndSessionConfiguration::~CameraIdAndSessionConfiguration() = default;
+
+status_t CameraIdAndSessionConfiguration::readFromParcel(const android::Parcel* parcel) {
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+    status_t err = OK;
+    String16 id;
+    if ((err = parcel->readString16(&id)) != OK) {
+        ALOGE("%s: Failed to read camera id!", __FUNCTION__);
+        return err;
+    }
+    if ((err = mSessionConfiguration.readFromParcel(parcel)) != OK) {
+        ALOGE("%s: Failed to read sessionConfiguration!", __FUNCTION__);
+        return err;
+    }
+    mCameraId = std::string(String8(id).string());
+    return OK;
+}
+
+status_t CameraIdAndSessionConfiguration::writeToParcel(android::Parcel* parcel) const {
+
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    status_t err = OK;
+    if ((err = parcel->writeString16(String16(mCameraId.c_str()))) != OK) {
+        ALOGE("%s: Failed to write camera id!", __FUNCTION__);
+        return err;
+    }
+
+    if ((err = mSessionConfiguration.writeToParcel(parcel) != OK)) {
+        ALOGE("%s: Failed to write session configuration!", __FUNCTION__);
+        return err;
+    }
+    return OK;
+}
+
+} // namespace utils
+} // namespace camera2
+} // namespace hardware
+} // namespace android
diff --git a/camera/include/camera/camera2/ConcurrentCamera.h b/camera/include/camera/camera2/ConcurrentCamera.h
new file mode 100644
index 0000000..ac99fd5
--- /dev/null
+++ b/camera/include/camera/camera2/ConcurrentCamera.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2020 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_CAMERA2_UTIL_CONCURRENTCAMERA_H
+#define ANDROID_HARDWARE_CAMERA2_UTIL_CONCURRENTCAMERA_H
+
+#include <binder/Parcel.h>
+#include <binder/Parcelable.h>
+#include <camera2/OutputConfiguration.h>
+#include <camera2/SessionConfiguration.h>
+
+namespace android {
+namespace hardware {
+namespace camera2 {
+namespace utils {
+
+struct ConcurrentCameraIdCombination : public Parcelable {
+    std::vector<std::string> mConcurrentCameraIds;
+    ConcurrentCameraIdCombination();
+    ConcurrentCameraIdCombination(std::vector<std::string> &&combination);
+    virtual ~ConcurrentCameraIdCombination();
+
+    virtual status_t writeToParcel(android::Parcel *parcel) const override;
+    virtual status_t readFromParcel(const android::Parcel* parcel) override;
+};
+
+struct CameraIdAndSessionConfiguration : public Parcelable {
+    std::string mCameraId;
+    SessionConfiguration mSessionConfiguration;
+
+    CameraIdAndSessionConfiguration();
+    virtual ~CameraIdAndSessionConfiguration();
+
+    virtual status_t writeToParcel(android::Parcel *parcel) const override;
+    virtual status_t readFromParcel(const android::Parcel* parcel) override;
+};
+
+} // namespace utils
+} // namespace camera2
+} // namespace hardware
+} // namespace android
+
+#endif