1 /* 2 * Copyright (C) 2017 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 package com.android.server.usb.descriptors; 17 18 // import com.android.server.usb.descriptors.report.ReportCanvas; 19 20 /** 21 * @hide 22 * An audio class-specific Selector Unit Interface. 23 * see audio10.pdf section 4.3.2.4 24 */ 25 public final class UsbACSelectorUnit extends UsbACInterface { 26 private static final String TAG = "UsbACSelectorUnit"; 27 28 private byte mUnitID; // 3:1 Constant uniquely identifying the Unit within the audio function. 29 // This value is used in all requests to address this Unit. 30 private byte mNumPins; // 4:1 Number of input pins in this unit 31 private byte[] mSourceIDs; // 5+mNumPins:1 ID of the Unit or Terminal to which the first 32 // Input Pin of this Selector Unit is connected. 33 private byte mNameIndex; // Index of a string descriptor, describing the Selector Unit. 34 35 public UsbACSelectorUnit(int length, byte type, byte subtype, int subClass) { 36 super(length, type, subtype, subClass); 37 } 38 39 public byte getUnitID() { 40 return mUnitID; 41 } 42 43 public byte getNumPins() { 44 return mNumPins; 45 } 46 47 public byte[] getSourceIDs() { 48 return mSourceIDs; 49 } 50 51 public byte getNameIndex() { 52 return mNameIndex; 53 } 54 55 @Override 56 public int parseRawDescriptors(ByteStream stream) { 57 mUnitID = stream.getByte(); 58 mNumPins = stream.getByte(); 59 mSourceIDs = new byte[mNumPins]; 60 for (int index = 0; index < mNumPins; index++) { 61 mSourceIDs[index] = stream.getByte(); 62 } 63 mNameIndex = stream.getByte(); 64 65 return mLength; 66 } 67 68 // @Override 69 // public void report(ReportCanvas canvas) { 70 // super.report(canvas); 71 // 72 // //TODO 73 // } 74 } 75
