| /* |
| * 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 Format II interface. |
| * see Frmts20.pdf section 2.4.2.1 Extended Type II Format Type Descriptor |
| */ |
| public final class Usb20ASFormatIIEx extends UsbASFormat { |
| private static final String TAG = "Usb20ASFormatIIEx"; |
| |
| // Frmts20.pdf Table 2-7: Extended Type II Format Type Descriptor |
| private int mMaxBitRate; // 4:2 Indicates the maximum number of bits per |
| // second this interface can handle in kbits/s |
| private int mSamplesPerFrame; // 6:2 Indicates the number of PCM audio |
| // samples contained in one encoded audio frame. |
| private byte mHeaderLength; // 8:1 Size of the Packet Header, in bytes. |
| private byte mSidebandProtocol; // 9:1 Constant, identifying the Side Band |
| // Protocol used for the Packet Header content. |
| |
| public Usb20ASFormatIIEx(int length, byte type, byte subtype, byte formatType, byte subclass) { |
| super(length, type, subtype, formatType, subclass); |
| } |
| |
| public int getMaxBitRate() { |
| return mMaxBitRate; |
| } |
| |
| public int getSamplesPerFrame() { |
| return mSamplesPerFrame; |
| } |
| |
| public byte getHeaderLength() { |
| return mHeaderLength; |
| } |
| |
| public byte getSidebandProtocol() { |
| return mSidebandProtocol; |
| } |
| |
| @Override |
| public int parseRawDescriptors(ByteStream stream) { |
| mMaxBitRate = stream.unpackUsbShort(); |
| mSamplesPerFrame = stream.unpackUsbShort(); |
| mHeaderLength = stream.getByte(); |
| mSidebandProtocol = stream.getByte(); |
| |
| return mLength; |
| } |
| |
| @Override |
| public void report(ReportCanvas canvas) { |
| super.report(canvas); |
| |
| canvas.openList(); |
| canvas.writeListItem("Max Bit Rate: " + getMaxBitRate()); |
| canvas.writeListItem("Samples Per Frame: " + getSamplesPerFrame()); |
| canvas.writeListItem("Header Length: " + getHeaderLength()); |
| canvas.writeListItem("Sideband Protocol: " + getSidebandProtocol()); |
| canvas.closeList(); |
| } |
| } |