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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MIDI_EXTRACTOR_H_
#define MIDI_EXTRACTOR_H_
#include <media/stagefright/DataSource.h>
#include <media/stagefright/MediaExtractor.h>
#include <media/stagefright/MediaBuffer.h>
#include <media/stagefright/MediaBufferGroup.h>
#include <media/MidiIoWrapper.h>
#include <utils/String8.h>
#include <libsonivox/eas.h>
namespace android {
class MidiEngine : public RefBase {
public:
MidiEngine(const sp<DataSource> &dataSource,
const sp<MetaData> &fileMetadata,
const sp<MetaData> &trackMetadata);
~MidiEngine();
status_t initCheck();
status_t allocateBuffers();
status_t releaseBuffers();
status_t seekTo(int64_t positionUs);
MediaBuffer* readBuffer();
private:
sp<MidiIoWrapper> mIoWrapper;
MediaBufferGroup *mGroup;
EAS_DATA_HANDLE mEasData;
EAS_HANDLE mEasHandle;
const S_EAS_LIB_CONFIG* mEasConfig;
bool mIsInitialized;
};
class MidiExtractor : public MediaExtractor {
public:
// Extractor assumes ownership of source
MidiExtractor(const sp<DataSource> &source);
virtual size_t countTracks();
virtual sp<MediaSource> getTrack(size_t index);
virtual sp<MetaData> getTrackMetaData(size_t index, uint32_t flags);
virtual sp<MetaData> getMetaData();
protected:
virtual ~MidiExtractor();
private:
sp<DataSource> mDataSource;
status_t mInitCheck;
sp<MetaData> mFileMetadata;
// There is only one track
sp<MetaData> mTrackMetadata;
sp<MidiEngine> mEngine;
EAS_DATA_HANDLE mEasData;
EAS_HANDLE mEasHandle;
EAS_PCM* mAudioBuffer;
EAS_I32 mPlayTime;
EAS_I32 mDuration;
EAS_STATE mState;
EAS_FILE mFileLocator;
MidiExtractor(const MidiExtractor &);
MidiExtractor &operator=(const MidiExtractor &);
};
bool SniffMidi(const sp<DataSource> &source, String8 *mimeType,
float *confidence, sp<AMessage> *);
} // namespace android
#endif // MIDI_EXTRACTOR_H_
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