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 WAV_EXTRACTOR_H_ 18 19 #define WAV_EXTRACTOR_H_ 20 21 #include <utils/Errors.h> 22 #include <media/stagefright/MediaExtractor.h> 23 24 namespace android { 25 26 struct AMessage; 27 class DataSource; 28 class String8; 29 30 class WAVExtractor : public MediaExtractor { 31 public: 32 // Extractor assumes ownership of "source". 33 WAVExtractor(const sp<DataSource> &source); 34 35 virtual size_t countTracks(); 36 virtual sp<IMediaSource> getTrack(size_t index); 37 virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags); 38 39 virtual sp<MetaData> getMetaData(); name()40 virtual const char * name() { return "WAVExtractor"; } 41 42 protected: 43 virtual ~WAVExtractor(); 44 45 private: 46 sp<DataSource> mDataSource; 47 status_t mInitCheck; 48 bool mValidFormat; 49 uint16_t mWaveFormat; 50 uint16_t mNumChannels; 51 uint32_t mChannelMask; 52 uint32_t mSampleRate; 53 uint16_t mBitsPerSample; 54 off64_t mDataOffset; 55 size_t mDataSize; 56 sp<MetaData> mTrackMeta; 57 58 status_t init(); 59 60 WAVExtractor(const WAVExtractor &); 61 WAVExtractor &operator=(const WAVExtractor &); 62 }; 63 64 bool SniffWAV( 65 const sp<DataSource> &source, String8 *mimeType, float *confidence, 66 sp<AMessage> *); 67 68 } // namespace android 69 70 #endif // WAV_EXTRACTOR_H_ 71 72