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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 
     20 /**
     21  * @hide
     22  * An audio class-specific Input Terminal interface.
     23  * see audio10.pdf section 4.3.2.1
     24  */
     25 public final class Usb10ACInputTerminal extends UsbACTerminal {
     26     private static final String TAG = "Usb10ACInputTerminal";
     27 
     28     private byte mNrChannels;       // 7:1 1 Channel (0x01)
     29                                     // Number of logical output channels in the
     30                                     // Terminals output audio channel cluster
     31     private int mChannelConfig;     // 8:2 Mono (0x0000)
     32     private byte mChannelNames;     // 10:1 Unused (0x00)
     33     private byte mTerminal;         // 11:1 Unused (0x00)
     34 
     35     public Usb10ACInputTerminal(int length, byte type, byte subtype, int subclass) {
     36         super(length, type, subtype, subclass);
     37     }
     38 
     39     public byte getNrChannels() {
     40         return mNrChannels;
     41     }
     42 
     43     public int getChannelConfig() {
     44         return mChannelConfig;
     45     }
     46 
     47     public byte getChannelNames() {
     48         return mChannelNames;
     49     }
     50 
     51     public byte getTerminal() {
     52         return mTerminal;
     53     }
     54 
     55     @Override
     56     public int parseRawDescriptors(ByteStream stream) {
     57         super.parseRawDescriptors(stream);
     58 
     59         mNrChannels = stream.getByte();
     60         mChannelConfig = stream.unpackUsbShort();
     61         mChannelNames = stream.getByte();
     62         mTerminal = stream.getByte();
     63 
     64         return mLength;
     65     }
     66 
     67     @Override
     68     public void report(ReportCanvas canvas) {
     69         super.report(canvas);
     70 
     71         canvas.openList();
     72         canvas.writeListItem("Associated Terminal: "
     73                 + ReportCanvas.getHexString(getAssocTerminal()));
     74         canvas.writeListItem("" + getNrChannels() + " Chans. Config: "
     75                 + ReportCanvas.getHexString(getChannelConfig()));
     76         canvas.closeList();
     77     }
     78 }
     79