1/* 2 * Copyright (C) 2013 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#ifndef RASTERMILL_REGISTRY_H 18#define RASTERMILL_REGISTRY_H 19 20class FrameSequence; 21class Decoder; 22class Stream; 23 24struct RegistryEntry { 25 int requiredHeaderBytes; 26 bool (*checkHeader)(void* header, int header_size); 27 FrameSequence* (*createFrameSequence)(Stream* stream); 28 Decoder* (*createDecoder)(Stream* stream); 29}; 30 31/** 32 * Template class for registering subclasses that can produce instances of themselves given a 33 * DataStream pointer. 34 * 35 * The super class / root constructable type only needs to define a single static construction 36 * meathod that creates an instance by iterating through all factory methods. 37 */ 38class Registry { 39public: 40 Registry(const RegistryEntry& entry); 41 42 static const RegistryEntry* Find(Stream* stream); 43 44private: 45 RegistryEntry mImpl; 46 Registry* mNext; 47}; 48 49#endif // RASTERMILL_REGISTRY_H 50