// Copyright (C) 2018 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.

// Note that if you add/remove methods in this file you must update
// the metrics sql as well ./android/scripts/gen-grpc-sql.py
//
// Please group deleted methods in a block including the date (MM/DD/YY)
// it was removed. This enables us to easily keep metrics around after removal
//
// List of deleted methods
// rpc iWasDeleted (03/12/12)
// ...
syntax = "proto3";

option java_multiple_files = true;
option java_package = "com.android.emulator.control";
option objc_class_prefix = "AEC";

package android.emulation.control;
import "google/protobuf/empty.proto";

// An EmulatorController service lets you control the emulator.
// Note that this is currently an experimental feature, and that the
// service definition might change without notice. Use at your own risk!
//
// We use the following rough conventions:
//
// streamXXX --> streams values XXX (usually for emulator lifetime). Values
//               are updated as soon as they become available.
// getXXX    --> gets a single value XXX
// setXXX    --> sets a single value XXX, does not returning state, these
//               usually have an observable lasting side effect.
// sendXXX   --> send a single event XXX, possibly returning state information.
//               android usually responds to these events.
service EmulatorController {
    // set/get/stream the sensor data
    // This RPC is not implemented in EmulatorController and will return an unimplemented error.
    rpc streamSensor(SensorValue) returns (stream SensorValue) {}
    // Gets the current value of a specified sensor.
    //
    // The following gRPC error codes can be returned:
    // -  INTERNAL (code 13) if `getSensorSize` fails to retrieve sensor dimensions.
    //
    // The `status` field in the `SensorValue` reply indicates the operational state:
    // -  `OK` (0): Sensor data retrieved successfully.
    // -  `UNKNOWN` (2): Unknown sensor type (should not happen if using valid `SensorType`).
    // -  `DISABLED` (3): The sensor is disabled.
    // -  `NO_SERVICE` (4): The `qemud` service responsible for sensors is not available or initiated.
    rpc getSensor(SensorValue) returns (SensorValue) {}
    // Sets the override value for a specified sensor. This operation is asynchronous
    // and executed on the emulator's main looper. An immediate subsequent `getSensor`
    // call might not reflect the newly set value.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    // No specific gRPC error codes are returned by this method itself, but underlying
    // operations might log warnings if the sensor agent is unavailable.
    rpc setSensor(SensorValue) returns (google.protobuf.Empty) {}

    // set/get/stream the physical model, this is likely the one you are
    // looking for when you wish to modify the device state.
    //
    // This operation is asynchronous and executed on the emulator's main looper. An immediate subsequent `getPhysicalModel`
    // call might not reflect the newly set value. The `interpolation` field from the request is used to determine the
    // physical interpolation method, mapped using `abs((static_cast<int>(physicalValue.interpolation())) - 1)`.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    rpc setPhysicalModel(PhysicalModelValue) returns (google.protobuf.Empty) {}
    // Gets the current value of a specified physical model parameter.
    //
    // The `status` field in the `PhysicalModelValue` reply indicates the operational state:
    // -  `OK` (0): Physical model data retrieved successfully.
    // -  `UNKNOWN` (2): Unknown physical type (should not happen if using valid `PhysicalType`).
    // -  `NO_SERVICE` (3): The `qemud` service responsible for physical parameters is not available or initiated.
    rpc getPhysicalModel(PhysicalModelValue) returns (PhysicalModelValue) {}
    // This RPC is not implemented in EmulatorController and will return an unimplemented error.
    rpc streamPhysicalModel(PhysicalModelValue)
            returns (stream PhysicalModelValue) {}

    // Atomically sets the current primary clipboard data. This operation is asynchronous
    // and executed on the emulator's main looper. It triggers a `ClipboardEvent`
    // to all listeners (except the originating channel) indicating the new content.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    rpc setClipboard(ClipData) returns (google.protobuf.Empty) {}
    // Retrieves the current primary clipboard data. This is a synchronous operation.
    //
    // This method returns `OK` (code 0) and the current `ClipData` upon success.
    rpc getClipboard(google.protobuf.Empty) returns (ClipData) {}

    // Streams real-time updates of the clipboard content. Upon subscription,
    // it immediately sends the current clipboard state. Subsequent updates are
    // streamed as new content becomes available from the guest or is set via `setClipboard`
    // from a different client. Events originating from the same client that initiated
    // the stream are filtered out to prevent echoing.
    //
    // It is possible to miss very rapid clipboard updates. The stream will block
    // awaiting new events after the initial state is sent.
    //
    // This method returns a server-side streaming reactor.
    rpc streamClipboard(google.protobuf.Empty) returns (stream ClipData) {}

    // Sets the emulator's battery state to the provided values. This operation is
    // executed asynchronously on the main looper.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling
    // of the operation. No explicit gRPC error codes are returned by this method.
    rpc setBattery(BatteryState) returns (google.protobuf.Empty) {}
    // Retrieves the current battery state from the emulator. This is a
    // synchronous operation that waits for completion.
    //
    // This method returns `OK` (code 0) and populates the `BatteryState` reply
    // with the current information upon success. No explicit gRPC error codes
    // are returned by this method.
    rpc getBattery(google.protobuf.Empty) returns (BatteryState) {}

    // Sets the state of the GPS in the emulator. This operation is asynchronous
    // and executed on the main looper. It updates the emulator's GPS location
    // (latitude, longitude, altitude, speed, bearing, and satellites) and sets
    // the timestamp.
    //
    // Note: Setting the GPS position will not be immediately reflected in the user
    // interface. Android typically samples GPS at 1 Hz.
    // This method returns `OK` (code 0) upon successful asynchronous scheduling
    // of the operation.
    rpc setGps(GpsState) returns (google.protobuf.Empty) {}

    // Gets the latest GPS state as reported by the emulator. This includes data
    // delivered by previous `setGps` calls or from the location UI if active.
    // This is a synchronous operation that waits for completion.
    //
    // Note: The returned GPS state is not necessarily the exact coordinate
    // visible at the time due to Android's typical 1 Hz GPS sample frequency.
    //
    // This method returns `OK` (code 0) and populates the `GpsState` reply
    // with the retrieved information upon success. No explicit gRPC error codes
    // are returned by this method.
    rpc getGps(google.protobuf.Empty) returns (GpsState) {}

    // Simulates a touch event on the fingerprint sensor. This operation is
    // executed asynchronously on the main looper.
    //
    // The `isTouching` field indicates whether the fingerprint sensor is being
    // touched, and `touchId` specifies the identifier of the registered
    // fingerprint. The `setTouch` agent function is used to apply these values.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling
    // of the operation. No explicit gRPC error codes are returned by this method.
    rpc sendFingerprint(Fingerprint) returns (google.protobuf.Empty) {}

    // Sends a keyboard event to the emulator. This operation is asynchronous
    // and executed on the main looper.
    //
    // The `KeyboardEvent` message allows specifying input using `keyCode`, `key` (W3C standard string), or `text` (UTF-8 string).
    // The `KeyEventSender` prioritizes `key`, then `keyCode`, then `text`.
    // - If `key` is a non-printable W3C key string (e.g., "Backspace", "ArrowUp"), it's translated to an evdev keycode and sent.
    // - If `key` is a printable Unicode character, it's converted to a sequence of evdev keydown/keyup events, handling modifiers.
    // - If `keyCode` is provided, it's translated from its `codeType` (Usb, Evdev, XKB, Win, Mac) to an evdev keycode and sent as keydown/keyup pairs.
    // - If `text` is provided, each UTF-8 character is converted to evdev keypress (keydown then keyup) events.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    rpc sendKey(KeyboardEvent) returns (google.protobuf.Empty) {}
    // Sends touch events to the emulator. This operation is asynchronous and executed on the main looper.
    //
    // The `TouchEvent` contains a list of `Touch` objects, each with `x`, `y` coordinates, `identifier`, `pressure`, `touch_major`, `touch_minor`, `expiration`, and `orientation`.
    // Coordinates are scaled to the emulator's display resolution. Each `Touch` `identifier` is mapped to an internal Linux multitouch slot.
    // Expiration handling ensures that inactive touch events are properly "lifted" after 120 seconds.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation. Warnings are logged if no touch slots are available.
    rpc sendTouch(TouchEvent) returns (google.protobuf.Empty) {}
    // Sends mouse events to the emulator. This operation is asynchronous and executed on the main looper.
    //
    // The `MouseEvent` specifies `x`, `y` coordinates, `buttons` state (bitmask: 1 for left, 2 for right), and `display` ID.
    // In certain virtual input configurations (VirtioInput enabled, but VirtioMouse and VirtioTablet disabled), `buttons` may be masked to only consider the primary button.
    // The event is sent to the emulator's `user_event_agent`.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    rpc sendMouse(MouseEvent) returns (google.protobuf.Empty) {}
    // Injects a stream of wheel events into the emulator. This is a server-side streaming RPC.
    //
    // Each `WheelEvent` contains `dx`, `dy` (delta values, `dy` is pre-multiplied by 120 for scroll clicks), and `display` ID.
    // If the emulator's input device has rotary capabilities (e.g., AVD_WEAR flavor), `dy` is scaled and sent as a rotary event.
    // Otherwise, it's sent as a standard mouse wheel event.
    //
    // This method returns a server-side streaming reactor.
    rpc injectWheel(stream WheelEvent) returns (google.protobuf.Empty) {}

    // Streams a series of generic input events to the emulator. The events are processed in the order they arrive.
    // This is a server-side streaming RPC that supports various input types encapsulated within `InputEvent`'s `oneof type` field.
    //
    // Supported input types:
    // - `key_event` (KeyboardEvent): Processed by `KeyEventSender` as described in `sendKey`.
    // - `touch_event` (TouchEvent): Processed by `TouchEventSender` as described in `sendTouch`.
    // - `mouse_event` (MouseEvent): Processed by `MouseEventSender` as described in `sendMouse`.
    // - `android_event` (AndroidEvent): Raw Linux input events (`type`, `code`, `value`) sent directly to the kernel.
    // - `pen_event` (PenEvent): Processed by `PenEventSender` for pen input, including pressure, orientation, and button state.
    // - `wheel_event` (WheelEvent): Processed by `WheelEventSender` as described in `injectWheel`.
    // - `xr_command` (XrCommand): Executes XR-specific commands (e.g., `RECENTER` to recenter the viewport). Unknown actions are logged as warnings.
    // - `xr_head_rotation_event` (RotationRadian): Sends head rotation data in radians. Logs an error if the agent call fails.
    // - `xr_head_movement_event` (Translation): Sends head movement data in meters. Logs an error if the agent call fails.
    // - `xr_head_angular_velocity_event` (AngularVelocity): Sends head angular velocity data in radians per second. Logs an error if the agent call fails.
    // - `xr_head_velocity_event` (Velocity): Sends head velocity data in meters per second. Logs an error if the agent call fails.
    // - `touchpad_event` (TouchpadEvent): Processed by `TouchpadEventSender` for touchpad input, similar to touch events but for a touchpad device.
    //
    // All underlying input sending operations for XR events are executed asynchronously on the main looper.
    //
    // Returns `INVALID_ARGUMENT` (code 3) if an unrecognized input event type is received, indicating a potential out-of-date emulator.
    // The stream reactor automatically deletes itself upon completion.
    rpc streamInputEvent(stream InputEvent) returns (google.protobuf.Empty) {}

    // Initiates or manipulates a phone call in the emulator. This is a synchronous
    // operation executed on the main looper.
    //
    // The `PhoneCall` message specifies the `operation` (e.g., InitCall, AcceptCall)
    // and the target phone `number`. The `telephonyCmd` agent function handles the
    // actual call action.
    //
    // Returns a `PhoneResponse` indicating the outcome:
    // - `OK` (0): The operation was successful.
    // - `BadOperation` (1): The provided `operation` enum is out of range.
    // - `BadNumber` (2): The provided `number` is malformed.
    // - `InvalidAction` (3): The requested `operation` is invalid given the current call state (e.g., disconnecting when no call is active).
    // - `ActionFailed` (4): An internal error occurred, typically if the modem agent is unavailable.
    // - `RadioOff` (5): The emulator's radio is turned off.
    rpc sendPhone(PhoneCall) returns (PhoneResponse) {}

    // Sends an SMS message to the emulator. This is a synchronous operation.
    //
    // The `SmsMessage` contains the `srcAddress` (source phone number) and the `text` of the message.
    // The `srcAddress` is validated for GSM formatting. The message `text` is converted into SMS PDUs
    // (Protocol Data Units) and delivered via the modem agent.
    //
    // Returns a `PhoneResponse` indicating the outcome:
    // - `OK` (0): The SMS message was successfully delivered.
    // - `BadNumber` (2): The `srcAddress` is malformed.
    // - `ActionFailed` (4): An internal error occurred, e.g., if the modem agent is unavailable or PDU creation fails.
    //
    // Other error cases from PDU creation (e.g., invalid characters in text) also result in `ActionFailed`.
    rpc sendSms(SmsMessage) returns (PhoneResponse) {}

    // Sets the emulator's phone number. This is a synchronous operation.
    //
    // The `PhoneNumber` message contains the new `number` to be set. The modem agent's
    // `amodem_update_phone_number` function is used for this update.
    //
    // Returns a `PhoneResponse` indicating the outcome:
    // - `OK` (0): The phone number was successfully updated.
    // - `BadNumber` (2): The provided `number` is invalid for the modem.
    // - `ActionFailed` (4): An internal error occurred, typically if the modem agent is unavailable.
    rpc setPhoneNumber(PhoneNumber) returns (PhoneResponse) {}

    // Retrieves the current status of the emulator. This includes comprehensive
    // information about the virtual machine's configuration and the guest operating system's state.
    //
    // The `EmulatorStatus` reply contains:
    // - `version`: The emulator version string.
    // - `uptime`: The time the emulator has been active in milliseconds.
    // - `booted`: A boolean indicating if the device has completed booting.
    // - `vmConfig`: Detailed `VmConfiguration` (hypervisor type, CPU cores, RAM size).
    // - `hardwareConfig`: Key-value pairs describing the emulator's hardware configuration.
    // - `heartbeat`: A monotonically increasing number indicating guest activity (incremented approximately once per second).
    // - `guestConfig`: A map of key-value pairs with guest-specific configurations, including:
    //    - "multidisplay": "available" or "unavailable" based on display pipe readiness.
    //    - "androidVersion": The Android version of the guest OS.
    //    - "hypervisorVersion": The hypervisor version used by the guest.
    //
    // This method returns `OK` (code 0) upon successful retrieval of the emulator status.
    rpc getStatus(google.protobuf.Empty) returns (EmulatorStatus) {}

    // Retrieves a single screenshot in the desired format.
    //
    // The image will be scaled to the `desiredWidth` and `desiredHeight` specified in `ImageFormat`, while maintaining
    // the aspect ratio. If `width` or `height` are 0, the device's current display dimensions are used.
    // The returned image will never exceed the device's actual display resolution, but can be smaller.
    //
    // The `display` field in `ImageFormat` specifies the target display; 0 (or omitted) indicates the main display.
    // For folded Pixel Fold devices, the display ID might be internally remapped, and `foldedDisplay` information will be populated.
    // The resulting image is properly oriented based on the device's coarse-grained orientation, derived from sensor state.
    //
    // The `transport` field in `ImageFormat` can specify `MMAP` for shared memory delivery, but if the shared memory region
    // is too small, a `FAILED_PRECONDITION` error will be returned.
    //
    // This method returns:
    // - `OK` (code 0) and an `Image` object upon success.
    // - `INVALID_ARGUMENT` (code 3) if the specified `display` ID is invalid or disabled.
    // - `CANCELLED` (code 1) if the gRPC context is cancelled during the operation (an expensive operation).
    // - `FAILED_PRECONDITION` (code 9) if the guest has not posted a new frame yet (for non-PNG formats when fast path is used).
    //
    // This method will return an image with width 0 and height 0 if the display is not visible.
    rpc getScreenshot(ImageFormat) returns (Image) {}

    // Streams a series of screenshots in the desired format. This is a server-side streaming RPC.
    //
    // A new frame is delivered whenever the device produces a new frame or when sensor changes occur.
    // Initial state: The first frame delivered might be an empty image (width 0, height 0) if the display is inactive.
    // Subsequent frames are delivered when new content is available or a sensor event triggers an update.
    // If the display becomes inactive, an empty image will be delivered again. Images resume when the display becomes active.
    //
    // `ImageFormat` parameters (format, width, height, display) behave as described in `getScreenshot`.
    // The `transport` field in `ImageFormat` can specify `MMAP` for shared memory delivery. If `MMAP` is used and the
    // provided shared memory handle is valid and mapped, pixel data will be written directly to it.
    // The `image` field in the `Image` reply will be empty if `MMAP` transport is used.
    //
    // Performance considerations:
    // - Streaming can produce a significant amount of data.
    // - `PNG` format is CPU-intensive due to encoding overhead.
    // - Using `MMAP` transport can significantly reduce gRPC overhead for pixel data.
    //
    // This method returns:
    // - A server-side streaming reactor.
    // - `INVALID_ARGUMENT` (code 3) if the specified `display` ID is invalid or disabled.
    // - `CANCELLED` (code 1) if the gRPC context is cancelled during the operation.
    rpc streamScreenshot(ImageFormat) returns (stream Image) {}

    // Streams a series of audio packets in the desired format. This is a server-side streaming RPC.
    // A new frame is delivered approximately every 20-30ms when the emulated device produces audio.
    // If `samplingRate` is 0, it defaults to 44100 Hz.
    // The stream may block indefinitely if the emulator ceases to produce audio.
    // Packets are allocated with a buffer size calculated based on the audio format and a 30ms frame time.
    //
    // This method returns `OK` (code 0) upon successful streaming initiation.
    rpc streamAudio(AudioFormat) returns (stream AudioPacket) {}

    // Injects a series of audio packets into the Android microphone. This is a client-side streaming RPC.
    // Audio packets are processed at a rate determined by the emulator's request for frames.
    // An internal buffer can hold approximately 300ms of audio.
    //
    // Notes:
    //  - Only the `AudioFormat` from the first received packet is honored. Subsequent `AudioFormat` changes are ignored.
    //  - `MODE_REAL_TIME` is experimental: incoming data may overwrite existing data if the client does not control timing properly.
    //  - The circular buffer attempts to deliver all queued samples upon stream closure by writing silence for up to 300ms.
    //
    // Returns the following gRPC error codes:
    // - `FAILED_PRECONDITION` (code 9): If another microphone is already active, or if unable to register the microphone.
    // - `INVALID_ARGUMENT` (code 3): If the desired `samplingRate` exceeds 48kHz, or if an `AudioPacket` is too large for the internal buffer.
    //
    // This method returns `OK` (code 0) upon successful completion of the stream.
    rpc injectAudio(stream AudioPacket) returns (google.protobuf.Empty) {}

    // Retrieves the current settings for the microphone
    rpc getMicrophoneState(google.protobuf.Empty) returns (MicrophoneState) {}

    // Sets the state for the microphone
    rpc setMicrophoneState(MicrophoneState) returns (google.protobuf.Empty) {}

    // Deprecated, please use the streamLogcat method instead.
    rpc getLogcat(LogMessage) returns (LogMessage) {
        option deprecated = true;
    }

    // Streams the logcat output from the emulator in real-time. This is a server-side streaming RPC.
    // The stream sources its data from the `logcat` command executed via `AdbShellStream` in the Android guest.
    // Log lines are processed individually as they arrive.
    //
    // The `LogMessage.sort` field determines the output format:
    // - If `LogMessage.sort` is `Parsed`, each incoming log line is parsed into a structured `LogcatEntry` object,
    //   and these entries are returned in the `LogMessage.entries` field. Structured parsing is typically
    //   available for Android API Level 23 (Marshmallow) and later.
    // - If `LogMessage.sort` is `Text` (or unspecified), the raw log line is returned in the `LogMessage.contents` field.
    //
    // The stream continues as long as the underlying `logcat` process is running and the client is connected.
    // The stream will naturally terminate if the `logcat` process stops or the connection is lost.
    // No explicit gRPC error codes are returned by this method during active streaming.
    rpc streamLogcat(LogMessage) returns (stream LogMessage) {}

    // Transitions the virtual machine to the desired state. This operation is asynchronous
    // and executed on the QEMU looper to handle necessary IO locks. Note that some states
    // (e.g., `UNKNOWN`, `RESTORE_VM`, `SAVE_VM`, `INTERNAL_ERROR`) are purely observable
    // and cannot be set directly.
    //
    // The `VmRunState.state` field triggers specific VM operations:
    // - `RESET`: Calls `vmReset()` to reset the VM.
    // - `SHUTDOWN`: Calls `skin_winsys_quit_request()` for a graceful shutdown, similar to closing the emulator GUI.
    // - `TERMINATE`: Forcefully kills the emulator process. This can lead to system corruption and should be used with extreme caution.
    // - `PAUSED`: Calls `vmPause()` to pause the VM, halting CPU cycles.
    // - `RUNNING`: Calls `vmResume()` to resume the VM.
    // - `RESTART`: Calls `ui->requestRestart()` to perform a full emulator restart.
    // - `START`: Calls `vmStart()` to resume a stopped emulator.
    // - `STOP`: Calls `vmStop()` to stop (pause) a running emulator.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    rpc setVmState(VmRunState) returns (google.protobuf.Empty) {}

    // Retrieves the current run state of the virtual machine. This is a synchronous operation.
    //
    // Internal QEMU run states are mapped to `VmRunState.RunState` as follows:
    // - `QEMU_RUN_STATE_PAUSED` and `QEMU_RUN_STATE_SUSPENDED` map to `PAUSED`.
    // - `QEMU_RUN_STATE_RESTORE_VM` maps to `RESTORE_VM`.
    // - `QEMU_RUN_STATE_RUNNING` maps to `RUNNING`.
    // - `QEMU_RUN_STATE_SAVE_VM` maps to `SAVE_VM`.
    // - `QEMU_RUN_STATE_SHUTDOWN` maps to `SHUTDOWN`.
    // - `QEMU_RUN_STATE_GUEST_PANICKED`, `QEMU_RUN_STATE_INTERNAL_ERROR`, and `QEMU_RUN_STATE_IO_ERROR` map to `INTERNAL_ERROR`.
    // - Any other states default to `UNKNOWN`.
    //
    // This method returns `OK` (code 0) and populates the `VmRunState` reply with the current VM state.
    rpc getVmState(google.protobuf.Empty) returns (VmRunState) {}

    // Atomically changes the current multi-display configuration. This operation applies
    // the provided `DisplayConfigurations`, with special handling for secondary displays.
    // Display ID 0 (the primary display) cannot be modified via this RPC.
    //
    // Preconditions:
    // - The `android::featurecontrol::MultiDisplay` feature must be enabled.
    //
    // Input Validation:
    // - `INVALID_ARGUMENT` (code 3): If duplicate `display` IDs are found in the request.
    // - `INVALID_ARGUMENT` (code 3): If any `DisplayConfiguration` (width, height, dpi, flags)
    //   is outside valid ranges as determined by `multiDisplayParamValidate`.
    // - `INVALID_ARGUMENT` (code 3): If any `display` ID is outside the configurable range
    //   `[1, userConfigurable]`.
    //
    // Atomic Update and Rollback:
    // The system attempts to apply each display configuration. If any update fails
    // (e.g., after multiple retries for transient pipe errors), a rollback mechanism
    // is initiated: successfully updated displays are reverted to their previous state,
    // and newly added displays are deleted. In such cases, an `INTERNAL` error is returned.
    //
    // Deletion of Unrequested Displays:
    // Any displays that were active before this call but are not present in the new
    // `request.displays` (and are not display ID 0) will be deleted.
    //
    // Notifications:
    // Upon successful completion, `notifyDisplayChanges()` is called to inform
    // third-party subscribers.
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful application of all configurations, returning the final active `DisplayConfigurations`.
    // - `FAILED_PRECONDITION` (code 9): If the multi-display feature is not available.
    // - `INTERNAL` (code 13): If an internal emulator failure occurs during display modification or rollback.
    rpc setDisplayConfigurations(DisplayConfigurations)
            returns (DisplayConfigurations) {}

    // Returns all currently valid logical displays configured in the emulator. This is a synchronous operation.
    //
    // Preconditions:
    // - The `android::featurecontrol::MultiDisplay` feature must be enabled.
    //
    // The `DisplayConfigurations` reply contains:
    // - `displays`: A repeated field of `DisplayConfiguration` objects, each detailing
    //   the width, height, DPI, flags, and ID of an active display.
    //   For Pixel Fold devices, only the main display configuration might be relevant.
    // - `userConfigurable`: The maximum number of user-configurable displays (IDs from 1 up to this value).
    // - `maxDisplays`: The total maximum number of displays the emulator supports.
    //
    // This method returns:
    // - `OK` (code 0) and the current `DisplayConfigurations` upon success.
    // - `FAILED_PRECONDITION` (code 9): If the AVD does not support the multi-display feature.
    rpc getDisplayConfigurations(google.protobuf.Empty)
            returns (DisplayConfigurations) {}

    // Notifies the client of various emulator state changes in real-time. This is a server-side streaming RPC.
    // Upon subscription, the current states of virtual scene camera, foldable posture, boot completion,
    // and XR options are immediately sent. The stream then continuously delivers new notifications
    // when relevant events occur. `UniqueEventStreamWriter` ensures that only distinct state changes are streamed.
    //
    // Notifications include:
    // - `CameraNotification`: Reports virtual scene camera activation/deactivation and associated display.
    // - `DisplayConfigurationsChangedNotification`: Triggered when display configurations are modified via the extended UI. Does not fire for changes made through console or gRPC.
    // - `Posture`: Reports changes in the device's foldable posture.
    // - `BootCompletedNotification`: Indicates when the emulator has finished booting.
    // - `BrightnessValue`: Reports changes in backlight brightness (LCD, keyboard, or button).
    // - `TextViewFocus`: Sent when a text view gains or loses focus, or immediately on subscription.
    // - `XrOptions`: Reports changes in XR-related settings (environment, passthrough coefficient), or immediately on subscription.
    // - `MicrophoneState` : Reports changes in the microphone state (currently whether host microphone access is allowed)
    //
    // This method returns a server-side streaming reactor.
    rpc streamNotification(google.protobuf.Empty)
            returns (stream Notification) {}

    // Rotates the virtual scene camera relative to its current orientation. This operation is asynchronous
    // and executed on the main looper.
    //
    // The `RotationRadian` message specifies angles in radians around the x, y, and z axes. The z component of rotation is currently unused.
    // The coordinate system is right-handed: x-axis points right, y-axis points up, and z-axis points towards the viewer.
    // This operation only succeeds if the virtual scene camera is actively connected.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    rpc rotateVirtualSceneCamera(RotationRadian)
            returns (google.protobuf.Empty) {}
    // Sets the absolute velocity of the virtual scene camera. This operation is asynchronous
    // and executed on the main looper.
    //
    // The `Velocity` message specifies components in meters per second along the x, y, and z axes.
    // The coordinate system is right-handed: x-axis points right, y-axis points up, and z-axis points towards the viewer.
    // The transition to these target velocity values may be smoothed over time by the implementation.
    // This operation only succeeds if the virtual scene camera is actively connected.
    //
    // This method returns `OK` (code 0) upon successful asynchronous scheduling of the operation.
    rpc setVirtualSceneCameraVelocity(Velocity)
            returns (google.protobuf.Empty) {}
    // Sets the foldable posture of the device. This operation is asynchronous
    // and executed on the main looper.
    //
    // The `Posture` message contains a `PostureValue` enum, defining the desired
    // physical configuration of the foldable device.
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful asynchronous scheduling of the operation.
    // - `FAILED_PRECONDITION` (code 9): If the emulator is unable to set the specified posture.
    rpc setPosture(Posture) returns (google.protobuf.Empty) {}

    // Retrieves the current backlight brightness for a specified light type. This is a synchronous operation.
    //
    // The `BrightnessValue.target` field (e.g., `LCD`, `KEYBOARD`, `BUTTON`) determines which light's brightness is queried.
    // Internal mapping converts these to string names like "lcd_backlight".
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful retrieval, populating the `BrightnessValue` reply with the `target` and current `value`.
    // - `FAILED_PRECONDITION` (code 9): If the AVD does not support the `hw-control` agent or its `getBrightness` function is unavailable.
    rpc getBrightness(BrightnessValue) returns (BrightnessValue) {}

    // Sets the backlight brightness for a specified light type. This operation is asynchronous
    // and executed on the main looper.
    //
    // The `BrightnessValue.target` field (e.g., `LCD`, `KEYBOARD`, `BUTTON`) determines which light's brightness is set.
    // The `BrightnessValue.value` specifies the desired intensity, ranging from 0 to 255.
    // Internal mapping converts `LightType` to string names like "lcd_backlight".
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful asynchronous scheduling of the operation.
    // - `FAILED_PRECONDITION` (code 9): If the AVD does not support the `hw-control` agent or its `setBrightness` function is unavailable.
    // - `INVALID_ARGUMENT` (code 3): If the `brightness` value exceeds the valid range (0-255).
    rpc setBrightness(BrightnessValue) returns (google.protobuf.Empty) {}

    // Returns the current mode of the primary display of a resizable AVD. This is a synchronous operation.
    //
    // Preconditions:
    // - The AVD must be configured to support resizable displays (`resizableEnabled()` must be true).
    //
    // The `DisplayMode.value` field will be populated with the current `DisplayModeValue`,
    // derived from the `getResizableActiveConfigId()`.
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful retrieval of the display mode.
    // - `FAILED_PRECONDITION` (code 9): If the AVD is not resizable.
    rpc getDisplayMode(google.protobuf.Empty) returns (DisplayMode) {}

    // Sets the size of the primary display of a resizable AVD to the specified `DisplayModeValue`. This operation is asynchronous
    // and executed on the main looper.
    //
    // Preconditions:
    // - The AVD must be configured to support resizable displays (`resizableEnabled()` must be true).
    // - The emulator's `changeResizableDisplay` agent function must be available.
    //
    // The `DisplayMode.value` field specifies the desired display configuration (e.g., `PHONE`, `FOLDABLE`, `TABLET`, `DESKTOP`).
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful asynchronous scheduling of the operation.
    // - `FAILED_PRECONDITION` (code 9): If the AVD is not resizable.
    // - `INTERNAL` (code 13): If the internal window agent function `changeResizableDisplay` is not available.
    rpc setDisplayMode(DisplayMode) returns (google.protobuf.Empty) {}

    // Changes the XR-related settings of the emulator. This operation is asynchronous
    // and executed on the main looper.
    //
    // The `XrOptions` message specifies the `environment` (e.g., `LIVING_ROOM_DAY`, `LIVING_ROOM_NIGHT`)
    // and `passthrough_coefficient` (a float between 0.0 and 1.0 for real/artificial environment visibility).
    // Values for `passthrough_coefficient` outside [0.0, 1.0] are ignored.
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful asynchronous scheduling of the operation.
    // - `FAILED_PRECONDITION` (code 9): If the `setXrOptions` agent function fails (e.g., if XR is not supported).
    rpc setXrOptions(XrOptions) returns (google.protobuf.Empty) {}

    // Retrieves the current state of XR-related settings from the emulator. This is a synchronous operation.
    //
    // Preconditions:
    // - XR mode must be supported in the current AVD (`isXrGuestOs()` must be true).
    //   (Note: Current implementation of `isXrGuestOs()` always returns true).
    //
    // The `XrOptions` reply contains the current `environment` and `passthrough_coefficient`.
    //
    // Returns the following gRPC error codes:
    // - `OK` (code 0): Upon successful retrieval of the XR options.
    // - `FAILED_PRECONDITION` (code 9): If XR mode is not supported in the current AVD or if the `getXrOptions` agent function fails.
    rpc getXrOptions(google.protobuf.Empty) returns (XrOptions) {}
}

// A Run State that describes the state of the Virtual Machine.
message VmRunState {
    enum RunState {
        // The emulator is in an unknown state. You cannot transition to this
        // state.
        UNKNOWN = 0;
        // Guest is actively running. You can transition to this state from the
        // paused state.
        RUNNING = 1;
        // Guest is paused to load a snapshot. You cannot transition to this
        // state.
        RESTORE_VM = 2;
        // Guest has been paused. Transitioning to this state will pause the
        // emulator the guest will not be consuming any cpu cycles.
        PAUSED = 3;
        // Guest is paused to take or export a snapshot. You cannot
        // transition to this state.
        SAVE_VM = 4;
        // System shutdown, note that it is similar to power off. It tries to
        // set the system status and notify guest. The system is likely going to
        // disappear soon and do proper cleanup of resources, possibly taking
        // a snapshot. This is the same behavior as closing the emulator by
        // clicking the X (close) in the user interface.
        SHUTDOWN = 5;
        // Immediately terminate the emulator. No resource cleanup will take
        // place. There is a good change to corrupt the system.
        TERMINATE = 7;
        // Will cause the emulator to reset. This is not a state you can
        // observe.
        RESET = 9;
        // Guest experienced some error state, you cannot transition to this
        // state.
        INTERNAL_ERROR = 10;
        // Completely restart the emulator.
        RESTART = 11;
        // Resume a stopped emulator
        START = 12;
        // Stop (pause) a running emulator
        STOP = 13;
    }

    RunState state = 1;
}

message ParameterValue {
    repeated float data = 1 [packed = true];
}

message PhysicalModelValue {
    enum State {
        OK = 0;
        NO_SERVICE = -3;  // qemud service is not available/initiated.
        DISABLED = -2;    // Sensor is disabled.
        UNKNOWN = -1;     // Unknown sensor (should not happen)
    }

    // Details on the sensors documentation can be found here:
    // https://developer.android.com/reference/android/hardware/Sensor.html#TYPE_
    // The types must follow the order defined in
    // "external/qemu/android/hw-sensors.h"
    enum PhysicalType {
        POSITION = 0;

        // All values are angles in degrees.
        // values = [x,y,z]
        ROTATION = 1;

        MAGNETIC_FIELD = 2;

        // Temperature in °C
        TEMPERATURE = 3;

        // Proximity sensor distance measured in centimeters
        PROXIMITY = 4;

        // Ambient light level in SI lux units
        LIGHT = 5;

        // Atmospheric pressure in hPa (millibar)
        PRESSURE = 6;

        // Relative ambient air humidity in percent
        HUMIDITY = 7;

        VELOCITY = 8;
        AMBIENT_MOTION = 9;

        // Describing a hinge angle sensor in degrees.
        HINGE_ANGLE0 = 10;
        HINGE_ANGLE1 = 11;
        HINGE_ANGLE2 = 12;

        ROLLABLE0 = 13;
        ROLLABLE1 = 14;
        ROLLABLE2 = 15;

        // Describing the device posture; the value should be an enum defined
        // in Posture::PostureValue.
        POSTURE = 16;

        // Heart rate in bpm
        HEART_RATE = 17;

        // Ambient RGBC light intensity. Values are in order (Red, Green, Blue,
        // Clear).
        RGBC_LIGHT = 18;

        // Wrist tilt gesture (1 = gaze, 0 = ungaze)
        WRIST_TILT = 19;
    }
    PhysicalType target = 1;

    // [Output Only]
    State status = 2;

    // Value interpretation depends on sensor.
    ParameterValue value = 3;
}

// A single sensor value.
message SensorValue {
    enum State {
        OK = 0;
        NO_SERVICE = -3;  // qemud service is not available/initiated.
        DISABLED = -2;    // Sensor is disabled.
        UNKNOWN = -1;     // Unknown sensor (should not happen)
    }

    // These are the various sensors that can be available in an emulated
    // devices.
    enum SensorType {
        // Measures the acceleration force in m/s2 that is applied to a device
        // on all three physical axes (x, y, and z), including the force of
        // gravity.
        ACCELERATION = 0;
        // Measures a device's rate of rotation in rad/s around each of the
        // three physical axes (x, y, and z).
        GYROSCOPE = 1;
        // Measures the ambient geomagnetic field for all three physical axes
        // (x, y, z) in μT.
        MAGNETIC_FIELD = 2;
        // Measures degrees of rotation that a device makes around all three
        // physical axes (x, y, z)
        ORIENTATION = 3;
        // Measures the temperature of the device in degrees Celsius (°C).
        TEMPERATURE = 4;
        // Measures the proximity of an object in cm relative to the view screen
        // of a device. This sensor is typically used to determine whether a
        // handset is being held up to a person's ear.
        PROXIMITY = 5;
        // Measures the ambient light level (illumination) in lx.
        LIGHT = 6;
        // Measures the ambient air pressure in hPa or mbar.
        PRESSURE = 7;
        // Measures the relative ambient humidity in percent (%).
        HUMIDITY = 8;
        MAGNETIC_FIELD_UNCALIBRATED = 9;
        GYROSCOPE_UNCALIBRATED = 10;

        // HINGE_ANGLE0 (11), HINGE_ANGLE1 (12), HINGE_ANGLE2 (13) are
        // skipped; clients should use get/setPhysicalModel() instead for these
        // "sensors".

        // Measures the heart rate in bpm.
        HEART_RATE = 14;
        // Measures the ambient RGBC light intensity.
        // Values are in order (Red, Green, Blue, Clear).
        RGBC_LIGHT = 15;
        // WIRST_TILT (16) is skipped; clients should use get/setPhysicalModel()
        // instead.
        // Measures acceleration force and provides bias data.
        ACCELERATION_UNCALIBRATED = 17;
        // A sensor of this type measures the direction in which the device is
        // pointing relative to true north in degrees.
        HEADING = 18;
    }

    // Type of sensor
    SensorType target = 1;

    // [Output Only]
    State status = 2;

    // Value interpretation depends on sensor enum.
    ParameterValue value = 3;
}

// A single backlight brightness value.
message BrightnessValue {
    enum LightType {
        // Display backlight. This will affect all displays.
        LCD = 0;
        KEYBOARD = 1;
        BUTTON = 2;
    }

    // Type of light
    LightType target = 1;

    // Light intensity, ranges from 0-255.
    uint32 value = 2;
}

// in line with android/emulation/resizable_display_config.h
enum DisplayModeValue {
    PHONE = 0;
    FOLDABLE = 1;
    TABLET = 2;
    DESKTOP = 3;
}

message DisplayMode {
    DisplayModeValue value = 1;
}

message XrOptions {
    enum Environment {
        LIVING_ROOM_DAY = 0;
        LIVING_ROOM_NIGHT = 1;
        // More environments may be added later.
    }

    // The currently active artificial surrounding environment (a.k.a.
    // passthrough environment).
    Environment environment = 1;

    // A value of 0.0 means that the real or artificial surrounding environment
    // (a.k.a. passthrough environment) is not visible. A value of 1.0 means
    // that the passthrough environment is fully visible. Any value outside of
    // the range [0.0-1.0] is ignored and leaves the state of passthrough
    // unchanged. For simplicity of the implementation, this number may be
    // rounded to an integer before applying.
    float passthrough_coefficient = 2;
}

message LogMessage {
    // [Output Only] The contents of the log output.
    string contents = 1;
    // The starting byte position of the output that was returned. This
    // should match the start parameter sent with the request. If the serial
    // console output exceeds the size of the buffer, older output will be
    // overwritten by newer content and the start values will be mismatched.
    int64 start = 2 [deprecated = true];
    //[Output Only] The position of the next byte of content from the serial
    // console output. Use this value in the next request as the start
    // parameter.
    int64 next = 3 [deprecated = true];

    // Set the sort of response you are interested it in.
    // It the type is "Parsed" the entries field will contain the parsed
    // results. otherwise the contents field will be set.
    LogType sort = 4;

    // [Output Only] The parsed logcat entries so far. Only set if sort is
    // set to Parsed
    repeated LogcatEntry entries = 5;

    enum LogType {
        Text = 0;
        Parsed = 1;
    }
}

// A parsed logcat entry.
message LogcatEntry {
    // The possible log levels.
    enum LogLevel {
        UNKNOWN = 0;
        DEFAULT = 1;
        VERBOSE = 2;
        DEBUG = 3;
        INFO = 4;
        WARN = 5;
        ERR = 6;
        FATAL = 7;
        SILENT = 8;
    }

    // A Unix timestamps in  milliseconds (The number of milliseconds that
    // have elapsed since January 1, 1970 (midnight UTC/GMT), not counting
    // leap seconds)
    uint64 timestamp = 1;

    // Process id.
    uint32 pid = 2;

    // Thread id.
    uint32 tid = 3;
    LogLevel level = 4;
    string tag = 5;
    string msg = 6;
}

// Information about the hypervisor that is currently in use.
message VmConfiguration {
    enum VmHypervisorType {
        // An unknown hypervisor
        UNKNOWN = 0;

        // No hypervisor is in use. This usually means that the guest is
        // running on a different CPU than the host, or you are using a
        // platform where no hypervisor is available.
        NONE = 1;

        // The Kernel based Virtual Machine
        // (https://www.linux-kvm.org/page/Main_Page)
        KVM = 2;

        // Intel® Hardware Accelerated Execution Manager (Intel® HAXM)
        HAXM = 3 [deprecated = true];

        // Hypervisor Framework.
        // https://developer.apple.com/documentation/hypervisor
        HVF = 4;

        // Window Hypervisor Platform
        // https://docs.microsoft.com/en-us/virtualization/api/
        WHPX = 5;

        AEHD = 6;
    }

    VmHypervisorType hypervisorType = 1;
    int32 numberOfCpuCores = 2;
    int64 ramSizeBytes = 3;
}

// Representation of a clipped data object on the clipboard.
message ClipData {
    // UTF-8 Encoded text.
    string text = 1;
}

// The Touch interface represents a single contact point on a
// touch-sensitive device. The contact point is commonly a finger or stylus
// and the device may be a touchscreen or trackpad.
message Touch {
    // The horizontal coordinate. This is the physical location on the
    // screen For example 0 indicates the leftmost coordinate.
    int32 x = 1;

    // The vertical coordinate. This is the physical location on the screen
    // For example 0 indicates the top left coordinate.
    int32 y = 2;

    // The identifier is an arbitrary non-negative integer that is used to
    // identify and track each tool independently when multiple tools are
    // active. For example, when multiple fingers are touching the device,
    // each finger should be assigned a distinct tracking id that is used as
    // long as the finger remains in contact. Tracking ids may be reused
    // when their associated tools move out of range.
    //
    // The emulator currently supports up to 10 concurrent touch events. The
    // identifier can be any uninque value and will be mapped to the next
    // available internal identifier.
    int32 identifier = 3;

    // Reports the physical pressure applied to the tip of the tool or the
    // signal strength of the touch contact.
    //
    // The values reported must be non-zero when the tool is touching the
    // device and zero otherwise to indicate that the touch event is
    // completed.
    //
    // Make sure to deliver a pressure of 0 for the given identifier when
    // the touch event is completed, otherwise the touch identifier will not
    // be unregistered!
    int32 pressure = 4;

    // Optionally reports the cross-sectional area of the touch contact, or
    // the length of the longer dimension of the touch contact.
    int32 touch_major = 5;

    // Optionally reports the length of the shorter dimension of the touch
    // contact. This axis will be ignored if touch_major is reporting an
    // area measurement greater than 0.
    int32 touch_minor = 6;

    enum EventExpiration {
        // The system will use the default time of 120s to track
        // the touch event with the given identifier. If no update happens
        // within this timeframe the identifier is considered expired
        // and can be made available for re-use. This means that a touch event
        // with pressure 0 for this identifier will be send to the emulator.
        EVENT_EXPIRATION_UNSPECIFIED = 0;

        // Never expire the given slot. You must *ALWAYS* close the identifier
        // by sending a touch event with 0 pressure.
        NEVER_EXPIRE = 1;
    }

    EventExpiration expiration = 7;

    // The orientation of the contact, if any.
    int32 orientation = 8;
}

// A Pen is similar to a touch, with the addition
// of button and rubber information.
message Pen {
    Touch location = 1;

    // True if the button is pressed or not
    bool button_pressed = 2;

    // True if it is a rubber pointer.
    bool rubber_pointer = 3;
}

// A TouchEvent contains a list of Touch objects that are in contact with
// the touch surface.
//
// Touch events are delivered in sequence as specified in the touchList.
//
// TouchEvents are delivered to the emulated devices using ["Protocol
// B"](https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt)
message TouchEvent {
    // The list of Touch objects, note that these do not need to be unique
    repeated Touch touches = 1;

    // The display device where the touch event occurred.
    // Omitting or using the value 0 indicates the main display.
    int32 display = 2;
}

// A TouchpadEvent contains a list of Touch objects that are in contact with
// the touchpad surface.
//
// Touchpad events are delivered in sequence as specified in the touchList.
//
// TouchpadEvents are delivered to the emulated devices using ["Protocol
// B"](https://www.kernel.org/doc/Documentation/input/multi-touch-protocol.txt)
message TouchpadEvent {
    // The list of Touch objects, note that these do not need to be unique
    repeated Touch touches = 1;

    // The touchpad device where the touch event occurred.
    // Omitting or using the value 0 indicates the main touchpad.
    int32 touchpad = 2;
}

message PenEvent {
    // The list of Pen objects, note that these do not need to be unique
    repeated Pen events = 1;

    // The display device where the pen event occurred.
    // Omitting or using the value 0 indicates the main display.
    int32 display = 2;
}

// The MouseEvent interface represents events that occur due to the user
// interacting with a pointing device (such as a mouse).
message MouseEvent {
    // The horizontal coordinate. This is the physical location on the
    // screen, where 0 indicates the leftmost coordinate.
    int32 x = 1;

    // The vertical coordinate. This is the physical location on the screen,
    // where 0 indicates the topmost coordinate.
    int32 y = 2;

    // Indicates which buttons are pressed.
    // 0: No button was pressed
    // 1: Primary button (left)
    // 2: Secondary button (right)
    int32 buttons = 3;

    // The display device where the mouse event occurred.
    // Omitting or using the value 0 indicates the main display.
    int32 display = 4;
}

message WheelEvent {
    // The value indicating how much the mouse wheel is rotated. Scaled so that
    // 120 equals to 1 wheel click. (120 is chosen as a multiplier often used to
    // represent wheel movements less than 1 wheel click. e.g.
    // https://doc.qt.io/qt-5/qwheelevent.html#angleDelta) Positive delta value
    // is assigned to dx when the top of wheel is moved to left. Similarly
    // positive delta value is assigned to dy when the top of wheel is moved
    // away from the user.
    int32 dx = 1;
    int32 dy = 2;

    // The display device where the mouse event occurred.
    // Omitting or using the value 0 indicates the main display.
    int32 display = 3;
}

// KeyboardEvent objects describe a user interaction with the keyboard; each
// event describes a single interaction between the user and a key (or
// combination of a key with modifier keys) on the keyboard.
// This follows the pattern as set by
// (javascript)[https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent]
//
// Note: that only keyCode, key, or text can be set and that the semantics
// will slightly vary.
message KeyboardEvent {
    // Code types that the emulator can receive. Note that the emulator
    // will do its best to translate the code to an evdev value that
    // will be send to the emulator. This translation is based on
    // the chromium translation tables. See
    // (this)[https://android.googlesource.com/platform/external/qemu/+/refs/heads/emu-master-dev/android/android-grpc/android/emulation/control/keyboard/keycode_converter_data.inc]
    // for details on the translation.
    enum KeyCodeType {
        Usb = 0;
        Evdev = 1;
        XKB = 2;
        Win = 3;
        Mac = 4;
    }

    enum KeyEventType {
        // Indicates that this keyevent should be send to the emulator
        // as a key down event. Meaning that the key event will be
        // translated to an EvDev event type and bit 11 (0x400) will be
        // set before it is sent to the emulator.
        keydown = 0;

        // Indicates that the keyevent should be send to the emulator
        // as a key up event. Meaning that the key event will be
        // translated to an EvDev event type and
        // sent to the emulator.
        keyup = 1;

        // Indicates that the keyevent will be send to the emulator
        // as e key down event and immediately followed by a keyup event.
        keypress = 2;
    }

    // Type of keycode contained in the keyCode field.
    KeyCodeType codeType = 1;

    // The type of keyboard event that should be sent to the emulator
    KeyEventType eventType = 2;

    // This property represents a physical key on the keyboard (as opposed
    // to the character generated by pressing the key). In other words, this
    // property is a value which isn't altered by keyboard layout or the
    // state of the modifier keys. This value will be interpreted by the
    // emulator depending on the KeyCodeType. The incoming key code will be
    // translated to an evdev code type and send to the emulator.
    // The values in key and text will be ignored.
    int32 keyCode = 3;

    // The value of the key pressed by the user, taking into consideration
    // the state of modifier keys such as Shift as well as the keyboard
    // locale and layout. This follows the w3c standard used in browsers.
    // You can find an accurate description of valid values
    // [here](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values)
    //
    // Note that some keys can result in multiple evdev events that are
    // delivered to the emulator. for example the Key "A" will result in a
    // sequence:
    // ["Shift", "a"] -> [0x2a, 0x1e] whereas "a" results in ["a"] -> [0x1e].
    //
    // Not all documented keys are understood by android, and only printable
    // ASCII [32-127) characters are properly translated.
    //
    // Keep in mind that there are a set of key values that result in android
    // specific behavior
    // [see](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values#Phone_keys):
    //
    // - "AppSwitch": Behaves as the "Overview" button in android.
    // - "GoBack": The Back button.
    // - "GoHome": The Home button, which takes the user to the phone's main
    //             screen (usually an application launcher).
    // - "Power":  The Power button.
    string key = 4;

    // Series of utf8 encoded characters to send to the emulator. An attempt
    // will be made to translate every character will an EvDev event type and
    // send to the emulator as a keypress event. The values in keyCode,
    // eventType, codeType and key will be ignored.
    //
    // Note that most printable ASCII characters (range [32-127) can be send
    // individually with the "key" param. Do not expect arbitrary UTF symbols to
    // arrive in the emulator (most will be ignored).
    //
    // Note that it is possible to overrun the keyboard buffer by slamming this
    // endpoint with large quantities of text (>1kb). The clipboard api is
    // better suited for transferring large quantities of text.
    string text = 5;
}

message XrCommand {
    enum Action {
        // Recenter the viewport position and rotation.
        RECENTER = 0;
    }

    Action action = 1;
}

// An input event that can be delivered to the emulator.
message InputEvent {
    oneof type {
        KeyboardEvent key_event = 1;
        TouchEvent touch_event = 2;
        MouseEvent mouse_event = 3;
        AndroidEvent android_event = 4;
        PenEvent pen_event = 5;
        WheelEvent wheel_event = 6;
        MouseEvent xr_hand_event = 7;
        MouseEvent xr_eye_event = 8;
        XrCommand xr_command = 9;
        RotationRadian xr_head_rotation_event = 10;
        Translation xr_head_movement_event = 11;
        AngularVelocity xr_head_angular_velocity_event = 12;
        Velocity xr_head_velocity_event = 13;
        TouchpadEvent touchpad_event = 14;
    }
};

// The android input event system is a framework for handling input from a
// variety of devices by generating events that describe changes in the
// state of the devices and forwarding them to user space applications.
//
// An AndroidEvents will be delivered directly to the kernel as is.
message AndroidEvent {
    // The type of the event. The types of the event are specified
    // by the android kernel. Some examples are:
    // EV_SYN, EV_KEY, EV_SW, etc..
    // The exact definitions can be found in the input.h header file.
    int32 type = 1;

    // The actual code to be send to the kernel. The actual meaning
    // of the code depends on the type definition.
    int32 code = 2;

    // The actual value of the event.
    int32 value = 3;

    // The display id associated with this input event.
    int32 display = 4;
};

message Fingerprint {
    // True when the fingprint is touched.
    bool isTouching = 1;

    // The identifier of the registered fingerprint.
    int32 touchId = 2;
}

message GpsState {
    // Setting this to false will disable auto updating  from the LocationUI,
    // otherwise the location UI will override the location at a frequency of
    // 1hz.
    //
    // - This is unused if the emulator is launched with -no-window, or when he
    //   location ui is disabled.
    // - This will BREAK the location ui experience if it is set to false. For
    //    example routing will no longer function.
    bool passiveUpdate = 1;

    // The latitude, in degrees.
    double latitude = 2;

    // The longitude, in degrees.
    double longitude = 3;

    // The speed if it is available, in meters/second over ground
    double speed = 4;

    // gets the horizontal direction of travel of this device, and is not
    // related to the device orientation. It is guaranteed to be in the
    // range [0.0, 360.0] if the device has a bearing. 0=North, 90=East,
    // 180=South, etc..
    double bearing = 5;

    // The altitude if available, in meters above the WGS 84 reference
    // ellipsoid.
    double altitude = 6;

    // The number of satellites used to derive the fix
    int32 satellites = 7;
}

message BatteryState {
    enum BatteryStatus {
        UNKNOWN = 0;
        CHARGING = 1;
        DISCHARGING = 2;
        NOT_CHARGING = 3;
        FULL = 4;
    }

    enum BatteryCharger {
        NONE = 0;
        AC = 1;
        USB = 2;
        WIRELESS = 3;
    }

    enum BatteryHealth {
        GOOD = 0;
        FAILED = 1;
        DEAD = 2;
        OVERVOLTAGE = 3;
        OVERHEATED = 4;
    }

    bool hasBattery = 1;
    bool isPresent = 2;
    BatteryCharger charger = 3;
    int32 chargeLevel = 4;
    BatteryHealth health = 5;
    BatteryStatus status = 6;
}

// An ImageTransport allows for specifying a side channel for
// delivering image frames versus using the standard bytes array that is
// returned with the gRPC request.
message ImageTransport {
    enum TransportChannel {
        // Return full frames over the gRPC transport
        TRANSPORT_CHANNEL_UNSPECIFIED = 0;

        // Write images to the a file/shared memory handle.
        MMAP = 1;
    }

    // The desired transport channel used for delivering image frames. Only
    // relevant when streaming screenshots.
    TransportChannel channel = 1;

    // Handle used for writing image frames if transport is mmap. The client
    // sets and owns this handle. It can be either a shm region, or a mmap. A
    // mmap should be a url that starts with `file:///` Note: the mmap can
    // result in tearing.
    string handle = 2;
}

// The aspect ratio (width/height) will be different from the one
// where the device is unfolded.
message FoldedDisplay {
    uint32 width = 1;
    uint32 height = 2;
    // It is possible for the screen to be folded in different ways depending
    // on which surface is shown to the user. So xOffset and yOffset indicate
    // the top left corner of the folded screen within the original unfolded
    // screen.
    uint32 xOffset = 3;
    uint32 yOffset = 4;
}

message ImageFormat {
    enum ImgFormat {
        // Portable Network Graphics format
        // (https://en.wikipedia.org/wiki/Portable_Network_Graphics)
        PNG = 0;

        // Three-channel RGB color model supplemented with a fourth alpha
        // channel. https://en.wikipedia.org/wiki/RGBA_color_model
        // Each pixel consists of 4 bytes.
        RGBA8888 = 1;

        // Three-channel RGB color model, each pixel consists of 3 bytes
        RGB888 = 2;
    }

    // The (desired) format of the resulting bytes.
    ImgFormat format = 1;

    // [Output Only] The rotation of the image. The image will be rotated
    // based upon the coarse grained orientation of the device.
    Rotation rotation = 2;

    // The (desired) width of the image. When passed as input
    // the image will be scaled to match the given
    // width, while maintaining the aspect ratio of the device.
    // The returned image will never exceed the given width, but can be less.
    // Omitting this value (or passing in 0) will result in no scaling,
    // and the width of the actual device will be used.
    uint32 width = 3;

    // The (desired) height of the image.  When passed as input
    // the image will be scaled to match the given
    // height, while maintaining the aspect ratio of the device.
    // The returned image will never exceed the given height, but can be less.
    // Omitting this value (or passing in 0) will result in no scaling,
    // and the height of the actual device will be used.
    uint32 height = 4;

    // The (desired) display id of the device. Setting this to 0 (or omitting)
    // indicates the main display.
    uint32 display = 5;

    // Set this if you wish to use a different transport channel to deliver
    // image frames.
    ImageTransport transport = 6;

    // [Output Only] Display configuration when screen is folded. The value is
    // the original configuration before scaling.
    FoldedDisplay foldedDisplay = 7;

    // [Output Only] Display mode when AVD is resizable.
    DisplayModeValue displayMode = 8;
}

message Image {
    ImageFormat format = 1;

    uint32 width = 2 [deprecated = true];   // width is contained in format.
    uint32 height = 3 [deprecated = true];  // height is contained in format.

    // The organization of the pixels in the image buffer is from left to
    // right and bottom up. This will be empty if an alternative image transport
    // is requested in the image format. In that case the side channel should
    // be used to obtain the image data.
    bytes image = 4;

    // [Output Only] Monotonically increasing sequence number in a stream of
    // screenshots. The first screenshot will have a sequence of 0. A single
    // screenshot will always have a sequence number of 0. The sequence is not
    // necessarily contiguous, and can be used to detect how many frames were
    // dropped. An example sequence could be: [0, 3, 5, 7, 9, 11].
    uint32 seq = 5;

    // [Output Only] Unix timestamp in microseconds when the emulator estimates
    // the frame was generated. The timestamp is before the actual frame is
    // copied and transformed. This can be used to calculate variance between
    // frame production time, and frame depiction time.
    uint64 timestampUs = 6;
}

message Rotation {
    enum SkinRotation {
        PORTRAIT = 0;           // 0 degrees
        LANDSCAPE = 1;          // 90 degrees
        REVERSE_PORTRAIT = 2;   // -180 degrees
        REVERSE_LANDSCAPE = 3;  // -90 degrees
    }

    // The rotation of the device, derived from the sensor state
    // of the emulator. The derivation reflects how android observes
    // the rotation state.
    SkinRotation rotation = 1;

    // Specifies the angle of rotation, in degrees [-180, 180]
    double xAxis = 2;
    double yAxis = 3;
    double zAxis = 4;
}

message PhoneCall {
    enum Operation {
        InitCall = 0;
        AcceptCall = 1;
        RejectCallExplicit = 2;
        RejectCallBusy = 3;
        DisconnectCall = 4;
        PlaceCallOnHold = 5;
        TakeCallOffHold = 6;
    }
    Operation operation = 1;
    string number = 2;
}

message PhoneResponse {
    enum Response {
        OK = 0;
        BadOperation = 1;   // Enum out of range
        BadNumber = 2;      // Mal-formed telephone number
        InvalidAction = 3;  // E.g., disconnect when no call is in progress
        ActionFailed = 4;   // Internal error
        RadioOff = 5;       // Radio power off
    }
    Response response = 1;
}

message Entry {
    string key = 1;
    string value = 2;
}

message EntryList {
    repeated Entry entry = 1;
}

message EmulatorStatus {
    // The emulator version string.
    string version = 1;

    // The time the emulator has been active in .ms
    uint64 uptime = 2;

    // True if the device has completed booting.
    // For P and later this information will accurate,
    // for older images we rely on adb.
    bool booted = 3;

    // The current vm configuration
    VmConfiguration vmConfig = 4;

    // The hardware configuration of the running emulator as
    // key valure pairs.
    EntryList hardwareConfig = 5;

    // Some guests will produce a heart beat, that can be used to
    // detect if the guest is active.
    // This is a monotonically increasing number that gets incremented
    // around once a second.
    uint64 heartbeat = 6;

    // The configuration of services in the guest, this map
    // contains key value pairs that are specific to the image
    // used by the guest.
    map<string, string> guestConfig = 7;
}

message AudioFormat {
    enum SampleFormat {
        AUD_FMT_U8 = 0;   // Unsigned 8 bit
        AUD_FMT_S16 = 1;  // Signed 16 bit (little endian)
    }

    enum Channels {
        Mono = 0;
        Stereo = 1;
    }

    enum DeliveryMode {
        // The audio queue will block and wait until the emulator requests
        // packets. The client does not have to throttle and can push packets at
        // will. This can result in the client falling behind.
        MODE_UNSPECIFIED = 0;
        // Audio packets will be delivered in real time (when possible). The
        // audio queue will be overwritten with incoming data if data is made
        // available. This means the client needs to control timing properly, or
        // packets will get overwritten.
        MODE_REAL_TIME = 1;  //
    }
    // Sampling rate to use, defaulting to 44100 if this is not set.
    // Note, that android devices typically will not use a sampling
    // rate higher than 48kHz. See
    // https://developer.android.com/ndk/guides/audio.
    uint64 samplingRate = 1;
    Channels channels = 2;
    SampleFormat format = 3;

    // [Input Only]
    // The mode used when delivering audio packets.
    DeliveryMode mode = 4;
}

message AudioPacket {
    AudioFormat format = 1;

    // Unix epoch in us when this frame was captured.
    uint64 timestamp = 2;

    // Contains a sample in the given audio format.
    bytes audio = 3;
}

message MicrophoneState {
    // Whether or not host microphone access is enabled
    bool realAudioEnabled = 1;
}

message SmsMessage {
    // The source address where this message came from.
    //
    // The address should be a valid GSM-formatted address as specified by
    // 3GPP 23.040 Sec 9.1.2.5.
    //
    // For example: +3106225412 or (650) 555-1221
    string srcAddress = 1;

    // A utf8 encoded text message that should be delivered.
    string text = 2;
}

// A DisplayConfiguration describes a primary or secondary
// display available to the emulator. The screen aspect ratio
// cannot be longer (or wider) than 21:9 (or 9:21). Screen sizes
// larger than 4k will be rejected.
//
// Common configurations (w x h) are:
// - 480p  (480x720)   142 dpi
// - 720p  (720x1280)  213 dpi
// - 1080p (1080x1920) 320 dpi
// - 4K  (2160x3840) 320 dpi
// - 4K  (2160x3840) 640 dpi (upscaled)
//
// The behavior of the virtual display depends on the flags that are provided to
// this method. By default, virtual displays are created to be private,
// non-presentation and unsecure.
message DisplayConfiguration {
    // These are the set of known android flags and their respective values.
    // you can combine the int values to (de)construct the flags field below.
    enum DisplayFlags {
        DISPLAYFLAGS_UNSPECIFIED = 0;

        // When this flag is set, the virtual display is public.
        // A public virtual display behaves just like most any other display
        // that is connected to the system such as an external or wireless
        // display. Applications can open windows on the display and the system
        // may mirror the contents of other displays onto it. see:
        // https://developer.android.com/reference/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PUBLIC
        VIRTUAL_DISPLAY_FLAG_PUBLIC = 1;

        // When this flag is set, the virtual display is registered as a
        // presentation display in the presentation display category.
        // Applications may automatically project their content to presentation
        // displays to provide richer second screen experiences.
        // https://developer.android.com/reference/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_PRESENTATION
        VIRTUAL_DISPLAY_FLAG_PRESENTATION = 2;

        // When this flag is set, the virtual display is considered secure as
        // defined by the Display#FLAG_SECURE display flag. The caller promises
        // to take reasonable measures, such as over-the-air encryption, to
        // prevent the contents of the display from being intercepted or
        // recorded on a persistent medium.
        // see:
        // https://developer.android.com/reference/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_SECURE
        VIRTUAL_DISPLAY_FLAG_SECURE = 4;

        // This flag is used in conjunction with VIRTUAL_DISPLAY_FLAG_PUBLIC.
        // Ordinarily public virtual displays will automatically mirror the
        // content of the default display if they have no windows of their own.
        // When this flag is specified, the virtual display will only ever show
        // its own content and will be blanked instead if it has no windows. See
        // https://developer.android.com/reference/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY
        VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY = 8;

        // Allows content to be mirrored on private displays when no content is
        // being shown.
        // This flag is mutually exclusive with
        // VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY. If both flags are specified
        // then the own-content only behavior will be applied.
        // see:
        // https://developer.android.com/reference/android/hardware/display/DisplayManager#VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR)
        VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR = 16;
    }

    // The width of the display, restricted to:
    // 320 * (dpi / 160) <= width
    uint32 width = 1;

    // The heigh of the display, restricted to:
    // * 320 * (dpi / 160) <= height
    uint32 height = 2;

    // The pixel density (dpi).
    // See https://developer.android.com/training/multiscreen/screendensities
    // for details. This value should be in the range [120, ..., 640]
    uint32 dpi = 3;

    // A combination of virtual display flags. These flags can be constructed
    // by combining the DisplayFlags enum described above.
    //
    // The behavior of the virtual display depends on the flags. By default
    // virtual displays are created to be private, non-presentation and
    // unsecure.
    uint32 flags = 4;

    // The id of the display.
    // The primary (default) display has the display ID of 0.
    // A secondary display has a display ID not 0.
    //
    // A display with the id in the range [1, userConfigurable]
    // can be modified. See DisplayConfigurations below for details.
    //
    // The id can be used to get or stream a screenshot.
    uint32 display = 5;
}
// Provides information about all the displays that can be attached
// to the emulator. The emulator will always have at least one display.
//
// The emulator usually has the following display configurations:
// 0:      The default display.
// 1 - 3:  User configurable displays. These can be added/removed.
//         For example the standalone emulator allows you to modify these
//         in the extended controls.
// 6 - 11: Fixed external displays. For example Android Auto uses fixed
//         displays in this range.
message DisplayConfigurations {
    repeated DisplayConfiguration displays = 1;

    // Display configurations with id [1, userConfigurable] are
    // user configurable, that is they can be added, removed or
    // updated.
    uint32 userConfigurable = 2;

    // The maximum number of attached displays this emulator supports.
    // This is the total number of displays that can be attached to
    // the emulator.
    //
    // Note: A display with an id that is larger than userConfigurable cannot
    // be modified.
    uint32 maxDisplays = 3;
}

message Notification {
    // Detailed notification information.
    oneof type {
        CameraNotification cameraNotification = 2;
        DisplayConfigurationsChangedNotification
                displayConfigurationsChangedNotification = 3;
        Posture posture = 4;
        BootCompletedNotification booted = 5;
        BrightnessValue brightness = 6;

        // This notification is sent when a TextView receives or loses focus.
        // It is also sent immediately in response to the streamNotification
        // call.
        TextViewFocus textViewFocus = 7;
        // This notification is sent when XrOptions change.
        // It is also sent immediately in response to the streamNotification
        // call.
        XrOptions xrOptions = 8;
        MicrophoneState microphoneState = 9;
    }
}

message BootCompletedNotification {
    // The time in milliseconds it took for the boot to complete.
    // Note that this value can be 0 when you are loading from a snapshot.
    int32 time = 1;
}

// Fired when the virtual scene camera is activated or deactivated and also in
// response to the streamNotification call.
message CameraNotification {
    // Indicates whether the camera app was activated or deactivated.
    bool active = 1;
    // The display the camera app is associated with.
    int32 display = 2;
}

message TextViewFocus {
    // Indicates whether a text view currently has focus.
    bool textViewHasFocus = 1;

    // If a text view has focus, the display where the text view is located.
    // Otherwise, unset.
    int32 display = 2;
}

// Fired when an update to a display event has been fired through the extended
// ui. This does not fire events when the display is changed through the console
// or the gRPC endpoint.
message DisplayConfigurationsChangedNotification {
    DisplayConfigurations displayConfigurations = 1;
}

message RotationRadian {
    // Components of the rotation vector in radians.
    // Rotation angles are relative to the current orientation.
    float x = 1;  // Angle of rotation around the x axis in right-handed direction.
    float y = 2;  // Angle of rotation around the y axis in right-handed direction.
    float z = 3;  // Angle of rotation around the z axis in right-handed direction.
}

message Translation {
    // Components of the translation vector in meters.
    float delta_x = 1;
    float delta_y = 2;
    float delta_z = 3;
}

message AngularVelocity {
    // Components of the target angular velocity vector in radians per second.
    // Transition to these values is implementation dependent, and may be
    // smoothed over time.
    float omega_x = 1;
    float omega_y = 2;
    float omega_z = 3;
}

message Velocity {
    // Components of the target velocity vector in meters per second.
    // Transition to these values is implementation dependent, and may be
    // smoothed over time.
    float x = 1;
    float y = 2;
    float z = 3;
}

// Must follow the definition in "external/qemu/android/hw-sensors.h"
message Posture {
    enum PostureValue {
        POSTURE_UNKNOWN = 0;
        POSTURE_CLOSED = 1;
        POSTURE_HALF_OPENED = 2;
        POSTURE_OPENED = 3;
        POSTURE_FLIPPED = 4;
        POSTURE_TENT = 5;
        POSTURE_MAX = 6;
    }
    PostureValue value = 3;
}

message PhoneNumber {
    //
    // The phone number should be a valid GSM-formatted number as specified by
    // 3GPP 23.040 Sec 9.1.2.5.
    //
    // For example: +3106225412 or (650) 555-1221
    string number = 1;
}