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 
33 namespace android {
34 
35 extern const char *kMaxEncoderInputBuffers;
36 
37 struct AMessage;
38 
39 struct MediaCodecList : public BnMediaCodecList {
40     static sp<IMediaCodecList> getInstance();
41 
42     virtual ssize_t findCodecByType(
43             const char *type, bool encoder, size_t startIndex = 0) const;
44 
45     virtual ssize_t findCodecByName(const char *name) const;
46 
47     virtual size_t countCodecs() const;
48 
getCodecInfoMediaCodecList49     virtual sp<MediaCodecInfo> getCodecInfo(size_t index) const {
50         return mCodecInfos.itemAt(index);
51     }
52 
53     virtual const sp<AMessage> getGlobalSettings() const;
54 
55     // to be used by MediaPlayerService alone
56     static sp<IMediaCodecList> getLocalInstance();
57 
58     // only to be used by getLocalInstance
59     static void *profilerThreadWrapper(void * /*arg*/);
60 
61     // only to be used by MediaPlayerService
62     void parseTopLevelXMLFile(const char *path, bool ignore_errors = false);
63 
64 private:
65     class BinderDeathObserver : public IBinder::DeathRecipient {
66         void binderDied(const wp<IBinder> &the_late_who __unused);
67     };
68 
69     static sp<BinderDeathObserver> sBinderDeathObserver;
70 
71     enum Section {
72         SECTION_TOPLEVEL,
73         SECTION_SETTINGS,
74         SECTION_DECODERS,
75         SECTION_DECODER,
76         SECTION_DECODER_TYPE,
77         SECTION_ENCODERS,
78         SECTION_ENCODER,
79         SECTION_ENCODER_TYPE,
80         SECTION_INCLUDE,
81     };
82 
83     static sp<IMediaCodecList> sCodecList;
84     static sp<IMediaCodecList> sRemoteList;
85 
86     status_t mInitCheck;
87     Section mCurrentSection;
88     bool mUpdate;
89     Vector<Section> mPastSections;
90     int32_t mDepth;
91     AString mHrefBase;
92 
93     sp<AMessage> mGlobalSettings;
94     KeyedVector<AString, CodecSettings> mOverrides;
95 
96     Vector<sp<MediaCodecInfo> > mCodecInfos;
97     sp<MediaCodecInfo> mCurrentInfo;
98     sp<IOMX> mOMX;
99 
100     MediaCodecList();
101     ~MediaCodecList();
102 
103     status_t initCheck() const;
104     void parseXMLFile(const char *path);
105 
106     static void StartElementHandlerWrapper(
107             void *me, const char *name, const char **attrs);
108 
109     static void EndElementHandlerWrapper(void *me, const char *name);
110 
111     void startElementHandler(const char *name, const char **attrs);
112     void endElementHandler(const char *name);
113 
114     status_t includeXMLFile(const char **attrs);
115     status_t addSettingFromAttributes(const char **attrs);
116     status_t addMediaCodecFromAttributes(bool encoder, const char **attrs);
117     void addMediaCodec(bool encoder, const char *name, const char *type = NULL);
118 
119     void setCurrentCodecInfo(bool encoder, const char *name, const char *type);
120 
121     status_t addQuirk(const char **attrs);
122     status_t addTypeFromAttributes(const char **attrs);
123     status_t addLimit(const char **attrs);
124     status_t addFeature(const char **attrs);
125     void addType(const char *name);
126 
127     status_t initializeCapabilities(const char *type);
128 
129     DISALLOW_EVIL_CONSTRUCTORS(MediaCodecList);
130 };
131 
132 }  // namespace android
133 
134 #endif  // MEDIA_CODEC_LIST_H_
135 
136