1 /*
2  * Copyright (C) 2009 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 AMR_EXTRACTOR_H_
18 
19 #define AMR_EXTRACTOR_H_
20 
21 #include <utils/Errors.h>
22 #include <media/MediaExtractor.h>
23 #include <media/stagefright/MetaDataBase.h>
24 
25 namespace android {
26 
27 struct AMessage;
28 class String8;
29 #define OFFSET_TABLE_LEN    300
30 
31 class AMRExtractor : public MediaExtractor {
32 public:
33     explicit AMRExtractor(DataSourceBase *source);
34 
35     virtual size_t countTracks();
36     virtual MediaTrack *getTrack(size_t index);
37     virtual status_t getTrackMetaData(MetaDataBase& meta, size_t index, uint32_t flags);
38 
39     virtual status_t getMetaData(MetaDataBase& meta);
name()40     virtual const char * name() { return "AMRExtractor"; }
41 
42 protected:
43     virtual ~AMRExtractor();
44 
45 private:
46     DataSourceBase *mDataSource;
47     MetaDataBase mMeta;
48     status_t mInitCheck;
49     bool mIsWide;
50 
51     off64_t mOffsetTable[OFFSET_TABLE_LEN]; //5 min
52     size_t mOffsetTableLength;
53 
54     AMRExtractor(const AMRExtractor &);
55     AMRExtractor &operator=(const AMRExtractor &);
56 };
57 
58 }  // namespace android
59 
60 #endif  // AMR_EXTRACTOR_H_
61