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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 Midi Endpoint.
     23  * see midi10.pdf section 6.2.2
     24  */
     25 public final class UsbACMidiEndpoint extends UsbACEndpoint {
     26     private static final String TAG = "UsbACMidiEndpoint";
     27 
     28     private byte mNumJacks;
     29     private byte[] mJackIds;
     30 
     31     public UsbACMidiEndpoint(int length, byte type, int subclass) {
     32         super(length, type, subclass);
     33     }
     34 
     35     public byte getNumJacks() {
     36         return mNumJacks;
     37     }
     38 
     39     public byte[] getJackIds() {
     40         return mJackIds;
     41     }
     42 
     43     @Override
     44     public int parseRawDescriptors(ByteStream stream) {
     45         super.parseRawDescriptors(stream);
     46 
     47         mNumJacks = stream.getByte();
     48         mJackIds = new byte[mNumJacks];
     49         for (int jack = 0; jack < mNumJacks; jack++) {
     50             mJackIds[jack] = stream.getByte();
     51         }
     52         return mLength;
     53     }
     54 
     55     @Override
     56     public void report(ReportCanvas canvas) {
     57         super.report(canvas);
     58 
     59         canvas.writeHeader(3, "AC Midi Endpoint: " + ReportCanvas.getHexString(getType())
     60                 + " Length: " + getLength());
     61         canvas.openList();
     62         canvas.writeListItem("" + getNumJacks() + " Jacks.");
     63         canvas.closeList();
     64     }
     65 }