1/* 2 * Copyright (C) 2024 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 {Timestamp} from 'common/time'; 18import {AbstractParser} from 'parsers/legacy/abstract_parser'; 19import {CoarseVersion} from 'trace/coarse_version'; 20import {MediaBasedTraceEntry} from 'trace/media_based_trace_entry'; 21import {TraceType} from 'trace/trace_type'; 22 23class ParserScreenshot extends AbstractParser<MediaBasedTraceEntry> { 24 private static readonly MAGIC_NUMBER = [ 25 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 26 ]; // currently only support png files 27 28 override getTraceType(): TraceType { 29 return TraceType.SCREENSHOT; 30 } 31 32 override getCoarseVersion(): CoarseVersion { 33 return CoarseVersion.LATEST; 34 } 35 36 override getMagicNumber(): number[] | undefined { 37 return ParserScreenshot.MAGIC_NUMBER; 38 } 39 40 override getRealToMonotonicTimeOffsetNs(): bigint | undefined { 41 return undefined; 42 } 43 44 override getRealToBootTimeOffsetNs(): bigint | undefined { 45 return undefined; 46 } 47 48 protected override getTimestamp(decodedEntry: number): Timestamp { 49 return this.timestampConverter.makeZeroTimestamp(); 50 } 51 52 override decodeTrace(screenshotData: Uint8Array): number[] { 53 return [0]; // require a non-empty array to be returned so trace can provide timestamps 54 } 55 56 override processDecodedEntry( 57 index: number, 58 entry: number, 59 ): MediaBasedTraceEntry { 60 const screenshotData = this.traceFile.file; 61 return new MediaBasedTraceEntry(0, screenshotData, true); 62 } 63} 64 65export {ParserScreenshot}; 66