MediaCodecList.h revision 77c185d5499d6174e7a97b3e1512994d3a803151 
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#include <media/IMediaCodecList.h>
24#include <media/IOMX.h>
25#include <media/MediaCodecInfo.h>
26
27#include <sys/types.h>
28#include <utils/Errors.h>
29#include <utils/KeyedVector.h>
30#include <utils/Vector.h>
31#include <utils/StrongPointer.h>
32
33namespace android {
34
35struct AMessage;
36
37struct MediaCodecList : public BnMediaCodecList {
38    static sp<IMediaCodecList> getInstance();
39
40    virtual ssize_t findCodecByType(
41            const char *type, bool encoder, size_t startIndex = 0) const;
42
43    virtual ssize_t findCodecByName(const char *name) const;
44
45    virtual size_t countCodecs() const;
46
47    virtual sp<MediaCodecInfo> getCodecInfo(size_t index) const {
48        if (index >= mCodecInfos.size()) {
49            ALOGE("b/24445127");
50            return NULL;
51        }
52        return mCodecInfos.itemAt(index);
53    }
54
55    // to be used by MediaPlayerService alone
56    static sp<IMediaCodecList> getLocalInstance();
57
58private:
59    enum Section {
60        SECTION_TOPLEVEL,
61        SECTION_DECODERS,
62        SECTION_DECODER,
63        SECTION_DECODER_TYPE,
64        SECTION_ENCODERS,
65        SECTION_ENCODER,
66        SECTION_ENCODER_TYPE,
67        SECTION_INCLUDE,
68    };
69
70    static sp<IMediaCodecList> sCodecList;
71    static sp<IMediaCodecList> sRemoteList;
72
73    status_t mInitCheck;
74    Section mCurrentSection;
75    Vector<Section> mPastSections;
76    int32_t mDepth;
77    AString mHrefBase;
78
79    Vector<sp<MediaCodecInfo> > mCodecInfos;
80    sp<MediaCodecInfo> mCurrentInfo;
81    sp<IOMX> mOMX;
82
83    MediaCodecList();
84    ~MediaCodecList();
85
86    status_t initCheck() const;
87    void parseXMLFile(const char *path);
88    void parseTopLevelXMLFile(const char *path);
89
90    static void StartElementHandlerWrapper(
91            void *me, const char *name, const char **attrs);
92
93    static void EndElementHandlerWrapper(void *me, const char *name);
94
95    void startElementHandler(const char *name, const char **attrs);
96    void endElementHandler(const char *name);
97
98    status_t includeXMLFile(const char **attrs);
99    status_t addMediaCodecFromAttributes(bool encoder, const char **attrs);
100    void addMediaCodec(bool encoder, const char *name, const char *type = NULL);
101
102    status_t addQuirk(const char **attrs);
103    status_t addTypeFromAttributes(const char **attrs);
104    status_t addLimit(const char **attrs);
105    status_t addFeature(const char **attrs);
106    void addType(const char *name);
107
108    status_t initializeCapabilities(const char *type);
109
110    DISALLOW_EVIL_CONSTRUCTORS(MediaCodecList);
111};
112
113}  // namespace android
114
115#endif  // MEDIA_CODEC_LIST_H_
116
117