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/*
* Copyright (C) 2011 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 AVI_EXTRACTOR_H_
#define AVI_EXTRACTOR_H_
#include <media/stagefright/foundation/ABase.h>
#include <media/stagefright/MediaExtractor.h>
#include <media/stagefright/MediaSource.h>
#include <utils/Vector.h>
namespace android {
struct AVIExtractor : public MediaExtractor {
AVIExtractor(const sp<DataSource> &dataSource);
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 ~AVIExtractor();
private:
struct AVISource;
struct SampleInfo {
uint32_t mOffset;
bool mIsKey;
};
struct Track {
sp<MetaData> mMeta;
Vector<SampleInfo> mSamples;
uint32_t mRate;
uint32_t mScale;
// If bytes per sample == 0, each chunk represents a single sample,
// otherwise each chunk should me a multiple of bytes-per-sample in
// size.
uint32_t mBytesPerSample;
enum Kind {
AUDIO,
VIDEO,
OTHER
} mKind;
size_t mNumSyncSamples;
size_t mThumbnailSampleSize;
ssize_t mThumbnailSampleIndex;
size_t mMaxSampleSize;
};
sp<DataSource> mDataSource;
status_t mInitCheck;
Vector<Track> mTracks;
off64_t mMovieOffset;
bool mFoundIndex;
bool mOffsetsAreAbsolute;
ssize_t parseChunk(off64_t offset, off64_t size, int depth = 0);
status_t parseStreamHeader(off64_t offset, size_t size);
status_t parseStreamFormat(off64_t offset, size_t size);
status_t parseIndex(off64_t offset, size_t size);
status_t parseHeaders();
status_t getSampleInfo(
size_t trackIndex, size_t sampleIndex,
off64_t *offset, size_t *size, bool *isKey,
int64_t *sampleTimeUs);
status_t getSampleTime(
size_t trackIndex, size_t sampleIndex, int64_t *sampleTimeUs);
status_t getSampleIndexAtTime(
size_t trackIndex,
int64_t timeUs, MediaSource::ReadOptions::SeekMode mode,
size_t *sampleIndex) const;
status_t addMPEG4CodecSpecificData(size_t trackIndex);
static bool IsCorrectChunkType(
ssize_t trackIndex, Track::Kind kind, uint32_t chunkType);
DISALLOW_EVIL_CONSTRUCTORS(AVIExtractor);
};
class String8;
struct AMessage;
bool SniffAVI(
const sp<DataSource> &source, String8 *mimeType, float *confidence,
sp<AMessage> *);
} // namespace android
#endif // AVI_EXTRACTOR_H_
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