// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto3";

package cast_receiver;

option optimize_for = LITE_RUNTIME;

option java_multiple_files = true;
option java_package = "com.google.pixel.exo.proto";
option java_outer_classname = "InputCapabilitiesProto";

// The types of input devices.
enum InputType {
  INPUT_TYPE_UNKNOWN = 0;
  INPUT_TYPE_KEYBOARD = 1;
  INPUT_TYPE_MOUSE = 2;
  INPUT_TYPE_TOUCH = 3;
}

// Metadata specific to keyboards.
message KeyboardMetadata {
  bool is_virtual = 1;
}

// Metadata specific to mice/pointing devices.
message MouseMetadata {}

// Metadata specific to touch devices.
message TouchMetadata {
  int32 max_touch_points = 1;
}

// Represents a physical or virtual input device.
message InputDevice {
  // Unique identifier for this device instance.
  string device_id = 1;

  InputType type = 2;

  // Optional user-visible name of the device (e.g. "Internal Keyboard", "BT
  // Mouse").
  string display_name = 3;

  // Common metadata for all device types.

  // The USB Vendor ID of the device. This can be used to identify the
  // manufacturer of the input device. For virtual devices or cases where
  // the physical hardware is not exposed, this may be set to 0 or a
  // custom vendor identifier.
  int32 vendor_id = 4;

  // The USB Product ID of the device. This, in combination with the
  // vendor_id, uniquely identifies the specific model of the input device.
  // For virtual devices, this may be set to 0 or a custom product identifier.
  int32 product_id = 5;

  // Device-specific metadata.
  oneof metadata {
    KeyboardMetadata keyboard_metadata = 6;
    MouseMetadata mouse_metadata = 7;
    TouchMetadata touch_metadata = 8;
  }
}

// Message used to communicate the supported inputs.
message InputCapabilities {
  // The list of input devices available/supported.
  repeated InputDevice devices = 1;
}