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
17import {assertDefined} from 'common/assert_utils';
18import {ParserTimestampConverter} from 'common/timestamp_converter';
19import {ParsingUtils} from 'parsers/legacy/parsing_utils';
20import {com} from 'protos/viewcapture/udc/static';
21import {Parser} from 'trace/parser';
22import {TraceFile} from 'trace/trace_file';
23import {TraceType} from 'trace/trace_type';
24import {HierarchyTreeNode} from 'trace/tree_node/hierarchy_tree_node';
25import {ParserViewCaptureWindow} from './parser_view_capture_window';
26import {ExportedData} from './tampered_protos';
27
28export class ParserViewCapture {
29  private readonly windowParsers: Array<Parser<HierarchyTreeNode>> = [];
30
31  constructor(
32    private readonly traceFile: TraceFile,
33    private readonly timestampConverter: ParserTimestampConverter,
34  ) {}
35
36  async parse() {
37    const traceBuffer = new Uint8Array(await this.traceFile.file.arrayBuffer());
38    ParsingUtils.throwIfMagicNumberDoesNotMatch(
39      traceBuffer,
40      ParserViewCapture.MAGIC_NUMBER,
41    );
42
43    const exportedData = ExportedData.decode(
44      traceBuffer,
45    ) as com.android.app.viewcapture.data.IExportedData;
46
47    const realToBootTimeOffsetNs = BigInt(
48      assertDefined(exportedData.realToElapsedTimeOffsetNanos).toString(),
49    );
50
51    exportedData.windowData?.forEach(
52      (windowData: com.android.app.viewcapture.data.IWindowData) =>
53        this.windowParsers.push(
54          new ParserViewCaptureWindow(
55            [this.traceFile.getDescriptor()],
56            windowData.frameData ?? [],
57            realToBootTimeOffsetNs,
58            assertDefined(exportedData.package),
59            assertDefined(windowData.title),
60            assertDefined(exportedData.classname),
61            this.timestampConverter,
62          ),
63        ),
64    );
65  }
66
67  getTraceType(): TraceType {
68    return TraceType.VIEW_CAPTURE;
69  }
70
71  getWindowParsers(): Array<Parser<HierarchyTreeNode>> {
72    return this.windowParsers;
73  }
74
75  private static readonly MAGIC_NUMBER = [
76    0x9, 0x78, 0x65, 0x90, 0x65, 0x73, 0x82, 0x65, 0x68,
77  ];
78}
79