396 lines
16 KiB
Java
396 lines
16 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.bluetooth;
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import android.annotation.Nullable;
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import android.annotation.SystemApi;
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import android.compat.annotation.UnsupportedAppUsage;
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import android.os.Build;
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import android.os.Parcel;
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import android.os.Parcelable;
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/**
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* Represents a Bluetooth class, which describes general characteristics and capabilities of a
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* device. For example, a Bluetooth class will specify the general device type such as a phone, a
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* computer, or headset, and whether it's capable of services such as audio or telephony.
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*
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* <p>Every Bluetooth class is composed of zero or more service classes, and exactly one device
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* class. The device class is further broken down into major and minor device class components.
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*
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* <p>{@link BluetoothClass} is useful as a hint to roughly describe a device (for example to show
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* an icon in the UI), but does not reliably describe which Bluetooth profiles or services are
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* actually supported by a device. Accurate service discovery is done through SDP requests, which
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* are automatically performed when creating an RFCOMM socket with {@link
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* BluetoothDevice#createRfcommSocketToServiceRecord} and {@link
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* BluetoothAdapter#listenUsingRfcommWithServiceRecord}
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*
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* <p>Use {@link BluetoothDevice#getBluetoothClass} to retrieve the class for a remote device.
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* <!--
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* The Bluetooth class is a 32 bit field. The format of these bits is defined at
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* http://www.bluetooth.org/Technical/AssignedNumbers/baseband.htm
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* (login required). This class contains that 32 bit field, and provides
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* constants and methods to determine which Service Class(es) and Device Class
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* are encoded in that field.
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* -->
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*/
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public final class BluetoothClass implements Parcelable {
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/**
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* Legacy error value. Applications should use null instead.
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*
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* @hide
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*/
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public static final int ERROR = 0xFF000000;
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private final int mClass;
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/** @hide */
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@UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
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public BluetoothClass(int classInt) {
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mClass = classInt;
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}
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@Override
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public boolean equals(@Nullable Object o) {
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if (o instanceof BluetoothClass) {
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return mClass == ((BluetoothClass) o).mClass;
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}
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return false;
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}
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@Override
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public int hashCode() {
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return mClass;
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}
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@Override
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public String toString() {
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return Integer.toHexString(mClass);
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}
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@Override
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public int describeContents() {
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return 0;
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}
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public static final @android.annotation.NonNull Parcelable.Creator<BluetoothClass> CREATOR =
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new Parcelable.Creator<BluetoothClass>() {
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public BluetoothClass createFromParcel(Parcel in) {
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return new BluetoothClass(in.readInt());
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}
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public BluetoothClass[] newArray(int size) {
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return new BluetoothClass[size];
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}
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};
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@Override
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public void writeToParcel(Parcel out, int flags) {
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out.writeInt(mClass);
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}
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/**
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* Defines all service class constants.
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*
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* <p>Each {@link BluetoothClass} encodes zero or more service classes.
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*/
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public static final class Service {
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private static final int BITMASK = 0xFFE000;
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public static final int LIMITED_DISCOVERABILITY = 0x002000;
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/** Represent devices LE audio service */
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public static final int LE_AUDIO = 0x004000;
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public static final int POSITIONING = 0x010000;
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public static final int NETWORKING = 0x020000;
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public static final int RENDER = 0x040000;
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public static final int CAPTURE = 0x080000;
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public static final int OBJECT_TRANSFER = 0x100000;
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public static final int AUDIO = 0x200000;
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public static final int TELEPHONY = 0x400000;
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public static final int INFORMATION = 0x800000;
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}
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/**
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* Return true if the specified service class is supported by this {@link BluetoothClass}.
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*
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* <p>Valid service classes are the public constants in {@link BluetoothClass.Service}. For
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* example, {@link BluetoothClass.Service#AUDIO}.
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*
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* @param service valid service class
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* @return true if the service class is supported
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*/
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public boolean hasService(int service) {
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return ((mClass & Service.BITMASK & service) != 0);
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}
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/**
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* Defines all device class constants.
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*
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* <p>Each {@link BluetoothClass} encodes exactly one device class, with major and minor
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* components.
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*
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* <p>The constants in {@link BluetoothClass.Device} represent a combination of major and minor
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* device components (the complete device class). The constants in {@link
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* BluetoothClass.Device.Major} represent only major device classes.
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*
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* <p>See {@link BluetoothClass.Service} for service class constants.
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*/
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public static class Device {
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private static final int BITMASK = 0x1FFC;
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/**
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* Defines all major device class constants.
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*
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* <p>See {@link BluetoothClass.Device} for minor classes.
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*/
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public static class Major {
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private static final int BITMASK = 0x1F00;
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public static final int MISC = 0x0000;
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public static final int COMPUTER = 0x0100;
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public static final int PHONE = 0x0200;
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public static final int NETWORKING = 0x0300;
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public static final int AUDIO_VIDEO = 0x0400;
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public static final int PERIPHERAL = 0x0500;
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public static final int IMAGING = 0x0600;
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public static final int WEARABLE = 0x0700;
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public static final int TOY = 0x0800;
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public static final int HEALTH = 0x0900;
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public static final int UNCATEGORIZED = 0x1F00;
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}
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// Devices in the COMPUTER major class
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public static final int COMPUTER_UNCATEGORIZED = 0x0100;
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public static final int COMPUTER_DESKTOP = 0x0104;
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public static final int COMPUTER_SERVER = 0x0108;
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public static final int COMPUTER_LAPTOP = 0x010C;
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public static final int COMPUTER_HANDHELD_PC_PDA = 0x0110;
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public static final int COMPUTER_PALM_SIZE_PC_PDA = 0x0114;
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public static final int COMPUTER_WEARABLE = 0x0118;
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// Devices in the PHONE major class
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public static final int PHONE_UNCATEGORIZED = 0x0200;
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public static final int PHONE_CELLULAR = 0x0204;
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public static final int PHONE_CORDLESS = 0x0208;
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public static final int PHONE_SMART = 0x020C;
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public static final int PHONE_MODEM_OR_GATEWAY = 0x0210;
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public static final int PHONE_ISDN = 0x0214;
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// Minor classes for the AUDIO_VIDEO major class
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public static final int AUDIO_VIDEO_UNCATEGORIZED = 0x0400;
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public static final int AUDIO_VIDEO_WEARABLE_HEADSET = 0x0404;
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public static final int AUDIO_VIDEO_HANDSFREE = 0x0408;
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// public static final int AUDIO_VIDEO_RESERVED = 0x040C;
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public static final int AUDIO_VIDEO_MICROPHONE = 0x0410;
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public static final int AUDIO_VIDEO_LOUDSPEAKER = 0x0414;
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public static final int AUDIO_VIDEO_HEADPHONES = 0x0418;
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public static final int AUDIO_VIDEO_PORTABLE_AUDIO = 0x041C;
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public static final int AUDIO_VIDEO_CAR_AUDIO = 0x0420;
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public static final int AUDIO_VIDEO_SET_TOP_BOX = 0x0424;
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public static final int AUDIO_VIDEO_HIFI_AUDIO = 0x0428;
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public static final int AUDIO_VIDEO_VCR = 0x042C;
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public static final int AUDIO_VIDEO_VIDEO_CAMERA = 0x0430;
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public static final int AUDIO_VIDEO_CAMCORDER = 0x0434;
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public static final int AUDIO_VIDEO_VIDEO_MONITOR = 0x0438;
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public static final int AUDIO_VIDEO_VIDEO_DISPLAY_AND_LOUDSPEAKER = 0x043C;
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public static final int AUDIO_VIDEO_VIDEO_CONFERENCING = 0x0440;
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// public static final int AUDIO_VIDEO_RESERVED = 0x0444;
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public static final int AUDIO_VIDEO_VIDEO_GAMING_TOY = 0x0448;
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// Devices in the WEARABLE major class
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public static final int WEARABLE_UNCATEGORIZED = 0x0700;
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public static final int WEARABLE_WRIST_WATCH = 0x0704;
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public static final int WEARABLE_PAGER = 0x0708;
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public static final int WEARABLE_JACKET = 0x070C;
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public static final int WEARABLE_HELMET = 0x0710;
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public static final int WEARABLE_GLASSES = 0x0714;
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// Devices in the TOY major class
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public static final int TOY_UNCATEGORIZED = 0x0800;
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public static final int TOY_ROBOT = 0x0804;
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public static final int TOY_VEHICLE = 0x0808;
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public static final int TOY_DOLL_ACTION_FIGURE = 0x080C;
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public static final int TOY_CONTROLLER = 0x0810;
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public static final int TOY_GAME = 0x0814;
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// Devices in the HEALTH major class
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public static final int HEALTH_UNCATEGORIZED = 0x0900;
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public static final int HEALTH_BLOOD_PRESSURE = 0x0904;
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public static final int HEALTH_THERMOMETER = 0x0908;
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public static final int HEALTH_WEIGHING = 0x090C;
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public static final int HEALTH_GLUCOSE = 0x0910;
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public static final int HEALTH_PULSE_OXIMETER = 0x0914;
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public static final int HEALTH_PULSE_RATE = 0x0918;
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public static final int HEALTH_DATA_DISPLAY = 0x091C;
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// Devices in PERIPHERAL major class
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public static final int PERIPHERAL_NON_KEYBOARD_NON_POINTING = 0x0500;
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public static final int PERIPHERAL_KEYBOARD = 0x0540;
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public static final int PERIPHERAL_POINTING = 0x0580;
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public static final int PERIPHERAL_KEYBOARD_POINTING = 0x05C0;
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}
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/**
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* Return the major device class component of this {@link BluetoothClass}.
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*
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* <p>Values returned from this function can be compared with the public constants in {@link
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* BluetoothClass.Device.Major} to determine which major class is encoded in this Bluetooth
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* class.
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*
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* @return major device class component
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*/
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public int getMajorDeviceClass() {
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return (mClass & Device.Major.BITMASK);
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}
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/**
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* Return the (major and minor) device class component of this {@link BluetoothClass}.
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*
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* <p>Values returned from this function can be compared with the public constants in {@link
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* BluetoothClass.Device} to determine which device class is encoded in this Bluetooth class.
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*
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* @return device class component
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*/
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public int getDeviceClass() {
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return (mClass & Device.BITMASK);
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}
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/**
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* Return the Bluetooth Class of Device (CoD) value including the {@link
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* BluetoothClass.Service}, {@link BluetoothClass.Device.Major} and minor device fields.
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*
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* <p>This value is an integer representation of Bluetooth CoD as in Bluetooth specification.
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*
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* @see <a href="Bluetooth
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* CoD">https://www.bluetooth.com/specifications/assigned-numbers/baseband</a>
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* @hide
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*/
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public int getClassOfDevice() {
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return mClass;
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}
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public static final int PROFILE_HEADSET = 0;
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public static final int PROFILE_A2DP = 1;
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/** @hide */
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@SystemApi public static final int PROFILE_OPP = 2;
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public static final int PROFILE_HID = 3;
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/** @hide */
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@SystemApi public static final int PROFILE_PANU = 4;
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/** @hide */
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@SystemApi public static final int PROFILE_NAP = 5;
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/** @hide */
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@SystemApi public static final int PROFILE_A2DP_SINK = 6;
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/**
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* Check class bits for possible bluetooth profile support. This is a simple heuristic that
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* tries to guess if a device with the given class bits might support specified profile. It is
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* not accurate for all devices. It tries to err on the side of false positives.
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*
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* @param profile the profile to be checked
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* @return whether this device supports specified profile
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*/
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public boolean doesClassMatch(int profile) {
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if (profile == PROFILE_A2DP) {
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if (hasService(Service.RENDER)) {
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return true;
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}
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// By the A2DP spec, sinks must indicate the RENDER service.
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// However we found some that do not (Chordette). So lets also
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// match on some other class bits.
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switch (getDeviceClass()) {
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case Device.AUDIO_VIDEO_HIFI_AUDIO:
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case Device.AUDIO_VIDEO_HEADPHONES:
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case Device.AUDIO_VIDEO_LOUDSPEAKER:
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case Device.AUDIO_VIDEO_CAR_AUDIO:
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return true;
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default:
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return false;
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}
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} else if (profile == PROFILE_A2DP_SINK) {
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if (hasService(Service.CAPTURE)) {
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return true;
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}
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// By the A2DP spec, srcs must indicate the CAPTURE service.
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// However if some device that do not, we try to
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// match on some other class bits.
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switch (getDeviceClass()) {
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case Device.AUDIO_VIDEO_HIFI_AUDIO:
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case Device.AUDIO_VIDEO_SET_TOP_BOX:
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case Device.AUDIO_VIDEO_VCR:
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return true;
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default:
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return false;
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}
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} else if (profile == PROFILE_HEADSET) {
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// The render service class is required by the spec for HFP, so is a
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// pretty good signal
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if (hasService(Service.RENDER)) {
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return true;
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}
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// Just in case they forgot the render service class
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switch (getDeviceClass()) {
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case Device.AUDIO_VIDEO_HANDSFREE:
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case Device.AUDIO_VIDEO_WEARABLE_HEADSET:
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case Device.AUDIO_VIDEO_CAR_AUDIO:
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return true;
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default:
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return false;
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}
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} else if (profile == PROFILE_OPP) {
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if (hasService(Service.OBJECT_TRANSFER)) {
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return true;
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}
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switch (getDeviceClass()) {
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case Device.COMPUTER_UNCATEGORIZED:
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case Device.COMPUTER_DESKTOP:
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case Device.COMPUTER_SERVER:
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case Device.COMPUTER_LAPTOP:
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case Device.COMPUTER_HANDHELD_PC_PDA:
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case Device.COMPUTER_PALM_SIZE_PC_PDA:
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case Device.COMPUTER_WEARABLE:
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case Device.PHONE_UNCATEGORIZED:
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case Device.PHONE_CELLULAR:
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case Device.PHONE_CORDLESS:
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case Device.PHONE_SMART:
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case Device.PHONE_MODEM_OR_GATEWAY:
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case Device.PHONE_ISDN:
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return true;
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default:
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return false;
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}
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} else if (profile == PROFILE_HID) {
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return getMajorDeviceClass() == Device.Major.PERIPHERAL;
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} else if (profile == PROFILE_PANU || profile == PROFILE_NAP) {
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// No good way to distinguish between the two, based on class bits.
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if (hasService(Service.NETWORKING)) {
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return true;
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}
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return getMajorDeviceClass() == Device.Major.NETWORKING;
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} else {
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return false;
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}
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}
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}
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