1// Copyright (C) 2019 The Android Open Source Project 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15import {perfetto} from '../gen/protos'; 16 17// In this file are contained a few functions to simplify the proto parsing. 18 19export function extractTraceConfig(enableTracingRequest: Uint8Array): 20 Uint8Array|undefined { 21 try { 22 const enableTracingObject = 23 perfetto.protos.EnableTracingRequest.decode(enableTracingRequest); 24 if (!enableTracingObject.traceConfig) return undefined; 25 return perfetto.protos.TraceConfig.encode(enableTracingObject.traceConfig) 26 .finish(); 27 } catch (e) { // This catch is for possible proto encoding/decoding issues. 28 console.error('Error extracting the config: ', e.message); 29 return undefined; 30 } 31} 32 33export function extractDurationFromTraceConfig(traceConfigProto: Uint8Array) { 34 try { 35 return perfetto.protos.TraceConfig.decode(traceConfigProto).durationMs; 36 } catch (e) { // This catch is for possible proto encoding/decoding issues. 37 return undefined; 38 } 39}