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      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  */
     24 public abstract class UsbACTerminal extends UsbACInterface {
     25     private static final String TAG = "UsbACTerminal";
     26 
     27     // Note that these fields are the same for both the
     28     // audio class-specific Output Terminal Interface.(audio10.pdf section 4.3.2.2)
     29     // and audio class-specific Input Terminal interface.(audio10.pdf section 4.3.2.1)
     30     // so we may as well unify the parsing here.
     31     protected byte mTerminalID;       // 3:1 ID of this Output Terminal. (0x02)
     32     protected int mTerminalType;      // 4:2 USB Streaming. (0x0101)
     33     protected byte mAssocTerminal;    // 6:1 Unused (0x00)
     34 
     35     public UsbACTerminal(int length, byte type, byte subtype, int subclass) {
     36         super(length, type, subtype, subclass);
     37     }
     38 
     39     public byte getTerminalID() {
     40         return mTerminalID;
     41     }
     42 
     43     public int getTerminalType() {
     44         return mTerminalType;
     45     }
     46 
     47     public byte getAssocTerminal() {
     48         return mAssocTerminal;
     49     }
     50 
     51     @Override
     52     public int parseRawDescriptors(ByteStream stream) {
     53         mTerminalID = stream.getByte();
     54         mTerminalType = stream.unpackUsbShort();
     55         mAssocTerminal = stream.getByte();
     56 
     57         return mLength;
     58     }
     59 
     60     @Override
     61     public void report(ReportCanvas canvas) {
     62         super.report(canvas);
     63 
     64         canvas.openList();
     65         int terminalType = getTerminalType();
     66         canvas.writeListItem("Type: " + ReportCanvas.getHexString(terminalType) + ": "
     67                 + UsbStrings.getTerminalName(terminalType));
     68         canvas.writeListItem("ID: " + ReportCanvas.getHexString(getTerminalID()));
     69         canvas.closeList();
     70     }
     71 }
     72