MediaCodecList.h revision afc16d667afa23f5aa00154ccad62f8c45cf5419 
1/*
2 * Copyright 2012, 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 MEDIA_CODEC_LIST_H_
18
19#define MEDIA_CODEC_LIST_H_
20
21#include <media/stagefright/foundation/ABase.h>
22#include <media/stagefright/foundation/AString.h>
23
24#include <sys/types.h>
25#include <utils/Errors.h>
26#include <utils/KeyedVector.h>
27#include <utils/Vector.h>
28
29namespace android {
30
31struct MediaCodecList {
32    static const MediaCodecList *getInstance();
33
34    ssize_t findCodecByType(
35            const char *type, bool encoder, size_t startIndex = 0) const;
36
37    ssize_t findCodecByName(const char *name) const;
38
39    const char *getCodecName(size_t index) const;
40    bool codecHasQuirk(size_t index, const char *quirkName) const;
41
42private:
43    enum Section {
44        SECTION_TOPLEVEL,
45        SECTION_DECODERS,
46        SECTION_DECODER,
47        SECTION_ENCODERS,
48        SECTION_ENCODER,
49    };
50
51    struct CodecInfo {
52        AString mName;
53        bool mIsEncoder;
54        uint32_t mTypes;
55        uint32_t mQuirks;
56    };
57
58    static MediaCodecList *sCodecList;
59
60    status_t mInitCheck;
61    Section mCurrentSection;
62    int32_t mDepth;
63
64    Vector<CodecInfo> mCodecInfos;
65    KeyedVector<AString, size_t> mCodecQuirks;
66    KeyedVector<AString, size_t> mTypes;
67
68    MediaCodecList();
69    ~MediaCodecList();
70
71    status_t initCheck() const;
72    void parseXMLFile(FILE *file);
73
74    static void StartElementHandlerWrapper(
75            void *me, const char *name, const char **attrs);
76
77    static void EndElementHandlerWrapper(void *me, const char *name);
78
79    void startElementHandler(const char *name, const char **attrs);
80    void endElementHandler(const char *name);
81
82    status_t addMediaCodecFromAttributes(bool encoder, const char **attrs);
83    void addMediaCodec(bool encoder, const char *name, const char *type = NULL);
84
85    status_t addQuirk(const char **attrs);
86    status_t addTypeFromAttributes(const char **attrs);
87    void addType(const char *name);
88
89    DISALLOW_EVIL_CONSTRUCTORS(MediaCodecList);
90};
91
92}  // namespace android
93
94#endif  // MEDIA_CODEC_LIST_H_
95
96