1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.media; 18 19 import android.media.AudioSystem; 20 21 /** 22 * The AudioDevicePort is a specialized type of AudioPort 23 * describing an input (e.g microphone) or output device (e.g speaker) 24 * of the system. 25 * An AudioDevicePort is an AudioPort controlled by the audio HAL, almost always a physical 26 * device at the boundary of the audio system. 27 * In addition to base audio port attributes, the device descriptor contains: 28 * - the device type (e.g AudioManager.DEVICE_OUT_SPEAKER) 29 * - the device address (e.g MAC adddress for AD2P sink). 30 * @see AudioPort 31 * @hide 32 */ 33 34 public class AudioDevicePort extends AudioPort { 35 36 private final int mType; 37 private final String mAddress; 38 39 AudioDevicePort(AudioHandle handle, int[] samplingRates, int[] channelMasks, 40 int[] formats, AudioGain[] gains, int type, String address) { 41 super(handle, 42 (AudioManager.isInputDevice(type) == true) ? 43 AudioPort.ROLE_SOURCE : AudioPort.ROLE_SINK, 44 samplingRates, channelMasks, formats, gains); 45 mType = type; 46 mAddress = address; 47 } 48 49 /** 50 * Get the device type (e.g AudioManager.DEVICE_OUT_SPEAKER) 51 */ 52 public int type() { 53 return mType; 54 } 55 56 /** 57 * Get the device address. Address format varies with the device type. 58 * - USB devices ({@link AudioManager#DEVICE_OUT_USB_DEVICE}, 59 * {@link AudioManager#DEVICE_IN_USB_DEVICE}) use an address composed of the ALSA card number 60 * and device number: "card=2;device=1" 61 * - Bluetooth devices ({@link AudioManager#DEVICE_OUT_BLUETOOTH_SCO}, 62 * {@link AudioManager#DEVICE_OUT_BLUETOOTH_SCO}, {@link AudioManager#DEVICE_OUT_BLUETOOTH_A2DP}) 63 * use the MAC address of the bluetooth device in the form "00:11:22:AA:BB:CC" as reported by 64 * {@link BluetoothDevice#getAddress()}. 65 * - Deivces that do not have an address will indicate an empty string "". 66 */ 67 public String address() { 68 return mAddress; 69 } 70 71 /** 72 * Build a specific configuration of this audio device port for use by methods 73 * like AudioManager.connectAudioPatch(). 74 */ 75 public AudioDevicePortConfig buildConfig(int samplingRate, int channelMask, int format, 76 AudioGainConfig gain) { 77 return new AudioDevicePortConfig(this, samplingRate, channelMask, format, gain); 78 } 79 80 @Override 81 public boolean equals(Object o) { 82 if (o == null || !(o instanceof AudioDevicePort)) { 83 return false; 84 } 85 return super.equals(o); 86 } 87 88 @Override 89 public String toString() { 90 String type = (mRole == ROLE_SOURCE ? 91 AudioSystem.getInputDeviceName(mType) : 92 AudioSystem.getOutputDeviceName(mType)); 93 return "{" + super.toString() 94 + ", mType: " + type 95 + ", mAddress: " + mAddress 96 + "}"; 97 } 98 } 99
