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/stagefright/MediaExtractor.h> 23 24 namespace android { 25 26 struct AMessage; 27 class String8; 28 #define OFFSET_TABLE_LEN 300 29 30 class AMRExtractor : public MediaExtractor { 31 public: 32 AMRExtractor(const sp<DataSource> &source); 33 34 virtual size_t countTracks(); 35 virtual sp<IMediaSource> getTrack(size_t index); 36 virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags); 37 38 virtual sp<MetaData> getMetaData(); name()39 virtual const char * name() { return "AMRExtractor"; } 40 41 protected: 42 virtual ~AMRExtractor(); 43 44 private: 45 sp<DataSource> mDataSource; 46 sp<MetaData> mMeta; 47 status_t mInitCheck; 48 bool mIsWide; 49 50 off64_t mOffsetTable[OFFSET_TABLE_LEN]; //5 min 51 size_t mOffsetTableLength; 52 53 AMRExtractor(const AMRExtractor &); 54 AMRExtractor &operator=(const AMRExtractor &); 55 }; 56 57 bool SniffAMR( 58 const sp<DataSource> &source, String8 *mimeType, float *confidence, 59 sp<AMessage> *); 60 61 } // namespace android 62 63 #endif // AMR_EXTRACTOR_H_ 64