| /* |
| * Copyright (C) 2013 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.accessorydisplay.common; |
| |
| /** |
| * Defines message types. |
| */ |
| public class Protocol { |
| // Message header. |
| // 0: service id (16 bits) |
| // 2: what (16 bits) |
| // 4: content size (32 bits) |
| // 8: ... content follows ... |
| static final int HEADER_SIZE = 8; |
| |
| // Maximum size of a message envelope including the header and contents. |
| static final int MAX_ENVELOPE_SIZE = 64 * 1024; |
| |
| /** |
| * Maximum message content size. |
| */ |
| public static final int MAX_CONTENT_SIZE = MAX_ENVELOPE_SIZE - HEADER_SIZE; |
| |
| public static final class DisplaySinkService { |
| private DisplaySinkService() { } |
| |
| public static final int ID = 1; |
| |
| // Query sink capabilities. |
| // Replies with sink available or not available. |
| public static final int MSG_QUERY = 1; |
| |
| // Send MPEG2-TS H.264 encoded content. |
| public static final int MSG_CONTENT = 2; |
| } |
| |
| public static final class DisplaySourceService { |
| private DisplaySourceService() { } |
| |
| public static final int ID = 2; |
| |
| // Sink is now available for use. |
| // 0: width (32 bits) |
| // 4: height (32 bits) |
| // 8: density dpi (32 bits) |
| public static final int MSG_SINK_AVAILABLE = 1; |
| |
| // Sink is no longer available for use. |
| public static final int MSG_SINK_NOT_AVAILABLE = 2; |
| } |
| } |