content: /*
   * Copyright (C) 2017 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.android.server.usb.descriptors;
  
  import com.android.server.usb.descriptors.report.ReportCanvas;
  
  /**
   * @hide
   * An audio class-specific Input Terminal interface.
   * see Audio20.pdf section 3.13.2 Input Terminal
   */
  public final class Usb20ACInputTerminal extends UsbACTerminal {
      private static final String TAG = "Usb20ACInputTerminal";
  
      // See Audio20.pdf - Table 4-9
      // Always 17 bytes
      private byte mClkSourceID;  // 7:1 - ID of the Clock Entity to which this Input
                                  // Terminal is connected.
      private byte mNumChannels;  // 8:1 - Number of logical output channels in the
                                  // Terminal’s output audio channel cluster.
      private int mChanConfig;    // 9:4 - Describes the spatial location of the
                                  // logical channels.
      private byte mChanNames;    // 13:1 - Index of a string descriptor, describing the
                                  // name of the first logical channel.
      private int mControls;      // 14:2 - Bitmask (see Audio20.pdf Table 4-9)
      private byte mTerminalName; // 16:1 - Index of a string descriptor, describing the
                                  // Input Terminal.
  
      public Usb20ACInputTerminal(int length, byte type, byte subtype, int subclass) {
          super(length, type, subtype, subclass);
      }
  
      public byte getClkSourceID() {
          return mClkSourceID;
      }
  
      public byte getNumChannels() {
          return mNumChannels;
      }
  
      public int getChanConfig() {
          return mChanConfig;
      }
  
      public int getControls() {
          return mControls;
      }
  
      @Override
      public int parseRawDescriptors(ByteStream stream) {
          super.parseRawDescriptors(stream);
  
          mClkSourceID = stream.getByte();
          mNumChannels = stream.getByte();
          mChanConfig = stream.unpackUsbInt();
          mChanNames = stream.getByte();
          mControls = stream.unpackUsbShort();
          mTerminalName = stream.getByte();
  
          return mLength;
      }
  
      @Override
      public void report(ReportCanvas canvas) {
          super.report(canvas);
  
          canvas.openList();
          canvas.writeListItem("Clock Source: " + getClkSourceID());
          canvas.writeListItem("" + getNumChannels() + " Channels. Config: "
                  + ReportCanvas.getHexString(getChanConfig()));
          canvas.closeList();
      }
  }
  