MediaCodecList.h revision 69829f3bd09ee4e6be49fee8795c5df24c4da70e 
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    size_t countCodecs() const;
40    const char *getCodecName(size_t index) const;
41    bool isEncoder(size_t index) const;
42    bool codecHasQuirk(size_t index, const char *quirkName) const;
43
44    status_t getSupportedTypes(size_t index, Vector<AString> *types) const;
45
46    struct ProfileLevel {
47        uint32_t mProfile;
48        uint32_t mLevel;
49    };
50    status_t getCodecCapabilities(
51            size_t index, const char *type,
52            Vector<ProfileLevel> *profileLevels,
53            Vector<uint32_t> *colorFormats) const;
54
55private:
56    enum Section {
57        SECTION_TOPLEVEL,
58        SECTION_DECODERS,
59        SECTION_DECODER,
60        SECTION_ENCODERS,
61        SECTION_ENCODER,
62    };
63
64    struct CodecInfo {
65        AString mName;
66        bool mIsEncoder;
67        uint32_t mTypes;
68        uint32_t mQuirks;
69    };
70
71    static MediaCodecList *sCodecList;
72
73    status_t mInitCheck;
74    Section mCurrentSection;
75    int32_t mDepth;
76
77    Vector<CodecInfo> mCodecInfos;
78    KeyedVector<AString, size_t> mCodecQuirks;
79    KeyedVector<AString, size_t> mTypes;
80
81    MediaCodecList();
82    ~MediaCodecList();
83
84    status_t initCheck() const;
85    void parseXMLFile(FILE *file);
86
87    static void StartElementHandlerWrapper(
88            void *me, const char *name, const char **attrs);
89
90    static void EndElementHandlerWrapper(void *me, const char *name);
91
92    void startElementHandler(const char *name, const char **attrs);
93    void endElementHandler(const char *name);
94
95    status_t addMediaCodecFromAttributes(bool encoder, const char **attrs);
96    void addMediaCodec(bool encoder, const char *name, const char *type = NULL);
97
98    status_t addQuirk(const char **attrs);
99    status_t addTypeFromAttributes(const char **attrs);
100    void addType(const char *name);
101
102    DISALLOW_EVIL_CONSTRUCTORS(MediaCodecList);
103};
104
105}  // namespace android
106
107#endif  // MEDIA_CODEC_LIST_H_
108
109