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