1 /* 2 * Copyright (C) 2014 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 MIDI_EXTRACTOR_H_ 18 #define MIDI_EXTRACTOR_H_ 19 20 #include <media/stagefright/DataSource.h> 21 #include <media/stagefright/MediaExtractor.h> 22 #include <media/stagefright/MediaBuffer.h> 23 #include <media/stagefright/MediaBufferGroup.h> 24 #include <media/MidiIoWrapper.h> 25 #include <utils/String8.h> 26 #include <libsonivox/eas.h> 27 28 namespace android { 29 30 class MidiEngine : public RefBase { 31 public: 32 MidiEngine(const sp<DataSource> &dataSource, 33 const sp<MetaData> &fileMetadata, 34 const sp<MetaData> &trackMetadata); 35 ~MidiEngine(); 36 37 status_t initCheck(); 38 39 status_t allocateBuffers(); 40 status_t releaseBuffers(); 41 status_t seekTo(int64_t positionUs); 42 MediaBuffer* readBuffer(); 43 private: 44 sp<MidiIoWrapper> mIoWrapper; 45 MediaBufferGroup *mGroup; 46 EAS_DATA_HANDLE mEasData; 47 EAS_HANDLE mEasHandle; 48 const S_EAS_LIB_CONFIG* mEasConfig; 49 bool mIsInitialized; 50 }; 51 52 class MidiExtractor : public MediaExtractor { 53 54 public: 55 // Extractor assumes ownership of source 56 explicit MidiExtractor(const sp<DataSource> &source); 57 58 virtual size_t countTracks(); 59 virtual sp<IMediaSource> getTrack(size_t index); 60 virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags); 61 62 virtual sp<MetaData> getMetaData(); name()63 virtual const char * name() { return "MidiExtractor"; } 64 65 protected: 66 virtual ~MidiExtractor(); 67 68 private: 69 sp<DataSource> mDataSource; 70 status_t mInitCheck; 71 sp<MetaData> mFileMetadata; 72 73 // There is only one track 74 sp<MetaData> mTrackMetadata; 75 76 sp<MidiEngine> mEngine; 77 78 EAS_DATA_HANDLE mEasData; 79 EAS_HANDLE mEasHandle; 80 EAS_PCM* mAudioBuffer; 81 EAS_I32 mPlayTime; 82 EAS_I32 mDuration; 83 EAS_STATE mState; 84 EAS_FILE mFileLocator; 85 86 MidiExtractor(const MidiExtractor &); 87 MidiExtractor &operator=(const MidiExtractor &); 88 89 }; 90 91 bool SniffMidi(const sp<DataSource> &source, String8 *mimeType, 92 float *confidence, sp<AMessage> *); 93 94 } // namespace android 95 96 #endif // MIDI_EXTRACTOR_H_ 97