1 /*
2  * Copyright (C) 2023 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 
17 package android.tools.traces.parsers.wm
18 
19 import android.tools.Timestamp
20 import android.tools.Timestamps
21 import android.tools.parsers.AbstractTraceParser
22 import android.tools.traces.wm.WindowManagerState
23 import android.tools.traces.wm.WindowManagerTrace
24 import com.android.server.wm.nano.WindowManagerTraceFileProto
25 import com.android.server.wm.nano.WindowManagerTraceProto
26 
27 /** Parser for [WindowManagerTrace] objects containing traces */
28 open class WindowManagerTraceParser(private val legacyTrace: Boolean = false) :
29     AbstractTraceParser<
30         WindowManagerTraceFileProto, WindowManagerTraceProto, WindowManagerState, WindowManagerTrace
31     >() {
32     private var realToElapsedTimeOffsetNanos = 0L
33 
34     override val traceName: String = "WM Trace"
35 
doDecodeByteArraynull36     override fun doDecodeByteArray(bytes: ByteArray): WindowManagerTraceFileProto =
37         WindowManagerTraceFileProto.parseFrom(bytes)
38 
39     override fun createTrace(entries: Collection<WindowManagerState>): WindowManagerTrace =
40         WindowManagerTrace(entries)
41 
42     override fun getEntries(input: WindowManagerTraceFileProto) = input.entry.toList()
43 
44     override fun getTimestamp(entry: WindowManagerTraceProto): Timestamp {
45         require(legacyTrace || realToElapsedTimeOffsetNanos != 0L)
46         return Timestamps.from(
47             elapsedNanos = entry.elapsedRealtimeNanos,
48             unixNanos = entry.elapsedRealtimeNanos + realToElapsedTimeOffsetNanos
49         )
50     }
51 
onBeforeParsenull52     override fun onBeforeParse(input: WindowManagerTraceFileProto) {
53         realToElapsedTimeOffsetNanos = input.realToElapsedTimeOffsetNanos
54     }
55 
doParseEntrynull56     override fun doParseEntry(entry: WindowManagerTraceProto): WindowManagerState {
57         return WindowManagerStateBuilder()
58             .atPlace(entry.where)
59             .forTimestamp(entry.elapsedRealtimeNanos)
60             .withRealTimeOffset(realToElapsedTimeOffsetNanos)
61             .forProto(entry.windowManagerService)
62             .build()
63     }
64 }
65