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 Format II interface. 23 * see Frmts20.pdf section 2.3.2.6 Type II Format Type Descriptor 24 */ 25 public final class Usb20ASFormatII extends UsbASFormat { 26 private static final String TAG = "Usb20ASFormatII"; 27 28 // Frmts20.pdf Table 2-3: Type II Format Type Descriptor 29 private int mMaxBitRate; // 4:2 Indicates the maximum number of bits per 30 // second this interface can handle in kbits/s. 31 private int mSlotsPerFrame; // 6:2 Indicates the number of PCM audio slots 32 // contained in one encoded audio frame. 33 34 /** 35 * TBD 36 */ 37 public Usb20ASFormatII(int length, byte type, byte subtype, byte formatType, int subclass) { 38 super(length, type, subtype, formatType, subclass); 39 } 40 41 /** 42 * TBD 43 */ 44 public int getmaxBitRate() { 45 return mMaxBitRate; 46 } 47 48 /** 49 * TBD 50 */ 51 public int getSlotsPerFrame() { 52 return mSlotsPerFrame; 53 } 54 55 @Override 56 public int parseRawDescriptors(ByteStream stream) { 57 mMaxBitRate = stream.unpackUsbShort(); 58 mSlotsPerFrame = stream.unpackUsbShort(); 59 60 return mLength; 61 } 62 63 @Override 64 public void report(ReportCanvas canvas) { 65 super.report(canvas); 66 67 canvas.openList(); 68 canvas.writeListItem("Max Bit Rate: " + getmaxBitRate()); 69 canvas.writeListItem("slots Per Frame: " + getSlotsPerFrame()); 70 canvas.closeList(); 71 } 72 } 73
