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;
  
  /**
   * @hide
   * An audio class-specific Audio Control Endpoint.
   * audio10.pdf section 4.4.2.1
   */
  public class UsbACAudioControlEndpoint extends UsbACEndpoint {
      private static final String TAG = "UsbACAudioControlEndpoint";
  
      private byte mAddress;  // 2:1 The address of the endpoint on the USB device.
                              // D7: Direction. 1 = IN endpoint
                              // D6..4: Reserved, reset to zero
                              // D3..0: The endpoint number.
      private byte mAttribs;  // 3:1 (see ATTRIBSMASK_* below
      private int mMaxPacketSize; // 4:2 Maximum packet size this endpoint is capable of sending
                                  // or receiving when this configuration is selected.
      private byte mInterval; // 6:1
  
      static final byte ADDRESSMASK_DIRECTION = (byte) 0x80;
      static final byte ADDRESSMASK_ENDPOINT  = 0x0F;
  
      static final byte ATTRIBSMASK_SYNC  = 0x0C;
      static final byte ATTRIBMASK_TRANS  = 0x03;
  
      public UsbACAudioControlEndpoint(int length, byte type, int subclass) {
          super(length, type, subclass);
      }
  
      public byte getAddress() {
          return mAddress;
      }
  
      public byte getAttribs() {
          return mAttribs;
      }
  
      public int getMaxPacketSize() {
          return mMaxPacketSize;
      }
  
      public byte getInterval() {
          return mInterval;
      }
  
      @Override
      public int parseRawDescriptors(ByteStream stream) {
          super.parseRawDescriptors(stream);
  
          mAddress = stream.getByte();
          mAttribs = stream.getByte();
          mMaxPacketSize = stream.unpackUsbShort();
          mInterval = stream.getByte();
  
          return mLength;
      }
  }
  