| /* |
| * Copyright (C) 2019 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 |
| * A video class-specific Interface Header super class. |
| * see USB_Video_Class_1.1.pdf section 3.9.2 - Class-Specific VS Interface Descriptors |
| */ |
| public abstract class UsbVCHeaderInterface extends UsbVCInterface { |
| private static final String TAG = "UsbVCHeaderInterface"; |
| |
| protected int mVDCRelease; // Video Device Class Specification Release (BCD). |
| protected int mTotalLength; // Total number of bytes returned for the class-specific |
| // VideoControl interface descriptor. Includes the combined length |
| // of this descriptor header and all Unit and Terminal descriptors. |
| |
| public UsbVCHeaderInterface( |
| int length, byte type, byte subtype, int vdcRelease) { |
| super(length, type, subtype); |
| mVDCRelease = vdcRelease; |
| } |
| |
| public int getVDCRelease() { |
| return mVDCRelease; |
| } |
| |
| public int getTotalLength() { |
| return mTotalLength; |
| } |
| |
| @Override |
| public void report(ReportCanvas canvas) { |
| super.report(canvas); |
| |
| canvas.openList(); |
| canvas.writeListItem("Release: " + ReportCanvas.getBCDString(getVDCRelease())); |
| canvas.writeListItem("Total Length: " + getTotalLength()); |
| canvas.closeList(); |
| } |
| } |