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 import com.android.server.usb.descriptors.report.UsbStrings; 20 21 /** 22 * @hide 23 * An audio class-specific General interface. 24 * see audio10.pdf section 4.5.2 25 */ 26 public final class Usb10ASGeneral extends UsbACInterface { 27 private static final String TAG = "Usb10ASGeneral"; 28 29 // audio10.pdf - section 4.5.2 30 private byte mTerminalLink; // 3:1 The Terminal ID of the Terminal to which the endpoint 31 // of this interface is connected. 32 private byte mDelay; // 4:1 Delay introduced by the data path (see Section 3.4, 33 // Inter Channel Synchronization). Expressed in number of frames. 34 private int mFormatTag; // 5:2 The Audio Data Format that has to be used to communicate 35 // with this interface. 36 37 public Usb10ASGeneral(int length, byte type, byte subtype, int subclass) { 38 super(length, type, subtype, subclass); 39 } 40 41 public byte getTerminalLink() { 42 return mTerminalLink; 43 } 44 45 public byte getDelay() { 46 return mDelay; 47 } 48 49 public int getFormatTag() { 50 return mFormatTag; 51 } 52 53 @Override 54 public int parseRawDescriptors(ByteStream stream) { 55 mTerminalLink = stream.getByte(); 56 mDelay = stream.getByte(); 57 mFormatTag = stream.unpackUsbShort(); 58 59 return mLength; 60 } 61 62 @Override 63 public void report(ReportCanvas canvas) { 64 super.report(canvas); 65 66 canvas.openList(); 67 canvas.writeListItem("Delay: " + mDelay); 68 canvas.writeListItem("Terminal Link: " + mTerminalLink); 69 canvas.writeListItem("Format: " + UsbStrings.getAudioFormatName(mFormatTag) + " - " 70 + ReportCanvas.getHexString(mFormatTag)); 71 canvas.closeList(); 72 } 73 } 74
