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/*
* Copyright (C) 2009 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 MPEG4_EXTRACTOR_H_
#define MPEG4_EXTRACTOR_H_
#include <arpa/inet.h>
#include <media/stagefright/DataSource.h>
#include <media/stagefright/MediaExtractor.h>
#include <media/stagefright/Utils.h>
#include <utils/List.h>
#include <utils/Vector.h>
#include <utils/String8.h>
namespace android {
struct AMessage;
class DataSource;
class SampleTable;
class String8;
struct SidxEntry {
size_t mSize;
uint32_t mDurationUs;
};
class MPEG4Extractor : public MediaExtractor {
public:
// Extractor assumes ownership of "source".
MPEG4Extractor(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();
virtual uint32_t flags() const;
// for DRM
virtual char* getDrmTrackInfo(size_t trackID, int *len);
protected:
virtual ~MPEG4Extractor();
private:
struct Track {
Track *next;
sp<MetaData> meta;
uint32_t timescale;
sp<SampleTable> sampleTable;
bool includes_expensive_metadata;
bool skipTrack;
};
Vector<SidxEntry> mSidxEntries;
uint64_t mSidxDuration;
off64_t mMoofOffset;
sp<DataSource> mDataSource;
status_t mInitCheck;
bool mHasVideo;
Track *mFirstTrack, *mLastTrack;
sp<MetaData> mFileMetaData;
Vector<uint32_t> mPath;
String8 mLastCommentMean;
String8 mLastCommentName;
String8 mLastCommentData;
status_t readMetaData();
status_t parseChunk(off64_t *offset, int depth);
status_t parseMetaData(off64_t offset, size_t size);
status_t updateAudioTrackInfoFromESDS_MPEG4Audio(
const void *esds_data, size_t esds_size);
static status_t verifyTrack(Track *track);
struct SINF {
SINF *next;
uint16_t trackID;
uint8_t IPMPDescriptorID;
ssize_t len;
char *IPMPData;
};
SINF *mFirstSINF;
bool mIsDrm;
status_t parseDrmSINF(off64_t *offset, off64_t data_offset);
status_t parseTrackHeader(off64_t data_offset, off64_t data_size);
status_t parseSegmentIndex(off64_t data_offset, size_t data_size);
Track *findTrackByMimePrefix(const char *mimePrefix);
MPEG4Extractor(const MPEG4Extractor &);
MPEG4Extractor &operator=(const MPEG4Extractor &);
};
bool SniffMPEG4(
const sp<DataSource> &source, String8 *mimeType, float *confidence,
sp<AMessage> *);
} // namespace android
#endif // MPEG4_EXTRACTOR_H_
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