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/MediaExtractorPluginApi.h>
23 #include <media/MediaExtractorPluginHelper.h>
24 #include <media/NdkMediaFormat.h>
25 
26 namespace android {
27 
28 struct AMessage;
29 class String8;
30 #define OFFSET_TABLE_LEN    300
31 
32 class AMRExtractor : public MediaExtractorPluginHelper {
33 public:
34     explicit AMRExtractor(DataSourceHelper *source);
35 
36     virtual size_t countTracks();
37     virtual MediaTrackHelper *getTrack(size_t index);
38     virtual media_status_t getTrackMetaData(AMediaFormat *meta, size_t index, uint32_t flags);
39 
40     virtual media_status_t getMetaData(AMediaFormat *meta);
name()41     virtual const char * name() { return "AMRExtractor"; }
42 
43 protected:
44     virtual ~AMRExtractor();
45 
46 private:
47     DataSourceHelper *mDataSource;
48     AMediaFormat *mMeta;
49     status_t mInitCheck;
50     bool mIsWide;
51 
52     off64_t mOffsetTable[OFFSET_TABLE_LEN]; //5 min
53     size_t mOffsetTableLength;
54 
55     AMRExtractor(const AMRExtractor &);
56     AMRExtractor &operator=(const AMRExtractor &);
57 };
58 
59 }  // namespace android
60 
61 #endif  // AMR_EXTRACTOR_H_
62