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 Mixer Interface.
   * see audio10.pdf section 4.3.2.3
   */
  public final class Usb10ACMixerUnit extends UsbACMixerUnit {
      private static final String TAG = "Usb10ACMixerUnit";
  
      private int mChannelConfig; // Spatial location of output channels
      private byte mChanNameID;   // First channel name string descriptor ID
      private byte[] mControls;   // bitmasks of which controls are present for each channel
      private byte mNameID;       // string descriptor ID of mixer name
  
      public Usb10ACMixerUnit(int length, byte type, byte subtype, int subClass) {
          super(length, type, subtype, subClass);
      }
  
      public int getChannelConfig() {
          return mChannelConfig;
      }
  
      public byte getChanNameID() {
          return mChanNameID;
      }
  
      public byte[] getControls() {
          return mControls;
      }
  
      public byte getNameID() {
          return mNameID;
      }
  
      @Override
      public int parseRawDescriptors(ByteStream stream) {
          super.parseRawDescriptors(stream);
  
          mChannelConfig = stream.unpackUsbShort();
          mChanNameID = stream.getByte();
  
          int controlArraySize = calcControlArraySize(mNumInputs, mNumOutputs);
          mControls = new byte[controlArraySize];
          for (int index = 0; index < controlArraySize; index++) {
              mControls[index] = stream.getByte();
          }
  
          mNameID = stream.getByte();
  
          return mLength;
      }
  
      @Override
      public void report(ReportCanvas canvas) {
          super.report(canvas);
  
          canvas.writeParagraph("Mixer Unit", false);
          canvas.openList();
  
          canvas.writeListItem("Unit ID: " + ReportCanvas.getHexString(getUnitID()));
          byte numInputs = getNumInputs();
          byte[] inputIDs = getInputIDs();
          canvas.openListItem();
          canvas.write("Num Inputs: " + numInputs + " [");
          for (int input = 0; input < numInputs; input++) {
              canvas.write("" + ReportCanvas.getHexString(inputIDs[input]));
              if (input < numInputs - 1) {
                  canvas.write(" ");
              }
          }
          canvas.write("]");
          canvas.closeListItem();
  
          canvas.writeListItem("Num Outputs: " + getNumOutputs());
          canvas.writeListItem("Channel Config: " + ReportCanvas.getHexString(getChannelConfig()));
  
          byte[] controls = getControls();
          canvas.openListItem();
          canvas.write("Controls: " + controls.length + " [");
          for (int ctrl = 0; ctrl < controls.length; ctrl++) {
              canvas.write("" + controls[ctrl]);
              if (ctrl < controls.length - 1) {
                  canvas.write(" ");
              }
          }
          canvas.write("]");
          canvas.closeListItem();
          canvas.closeList();
      }
  }
  