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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MP4METADATA_H_
#define MP4METADATA_H_
#include <type_traits>
#include "mozilla/UniquePtr.h"
#include "DecoderData.h"
#include "Index.h"
#include "MediaData.h"
#include "MediaInfo.h"
#include "MediaResult.h"
#include "ByteStream.h"
#include "mp4parse.h"
namespace mozilla {
DDLoggedTypeDeclName(MP4Metadata);
// The memory owner in mIndice.indices is rust mp4 parser, so lifetime of this
// class SHOULD NOT longer than rust parser.
class IndiceWrapper {
public:
size_t Length() const;
bool GetIndice(size_t aIndex, Index::Indice& aIndice) const;
explicit IndiceWrapper(Mp4parseByteData& aRustIndice);
protected:
Mp4parseByteData mIndice;
};
struct FreeMP4Parser {
void operator()(Mp4parseParser* aPtr) { mp4parse_free(aPtr); }
};
// Wrap an Stream to remember the read offset.
class StreamAdaptor {
public:
explicit StreamAdaptor(ByteStream* aSource) : mSource(aSource), mOffset(0) {}
~StreamAdaptor() = default;
bool Read(uint8_t* buffer, uintptr_t size, size_t* bytes_read);
private:
ByteStream* mSource;
CheckedInt<size_t> mOffset;
};
class MP4Metadata : public DecoderDoctorLifeLogger<MP4Metadata> {
public:
explicit MP4Metadata(ByteStream* aSource);
~MP4Metadata();
// Simple template class containing a MediaResult and another type.
template <typename T>
class ResultAndType {
public:
template <typename M2, typename T2>
ResultAndType(M2&& aM, T2&& aT)
: mResult(std::forward<M2>(aM)), mT(std::forward<T2>(aT)) {}
ResultAndType(const ResultAndType&) = default;
ResultAndType& operator=(const ResultAndType&) = default;
ResultAndType(ResultAndType&&) = default;
ResultAndType& operator=(ResultAndType&&) = default;
mozilla::MediaResult& Result() { return mResult; }
T& Ref() { return mT; }
private:
mozilla::MediaResult mResult;
std::decay_t<T> mT;
};
using ResultAndByteBuffer = ResultAndType<RefPtr<mozilla::MediaByteBuffer>>;
static ResultAndByteBuffer Metadata(ByteStream* aSource);
static constexpr uint32_t NumberTracksError() { return UINT32_MAX; }
using ResultAndTrackCount = ResultAndType<uint32_t>;
ResultAndTrackCount GetNumberTracks(
mozilla::TrackInfo::TrackType aType) const;
using ResultAndTrackInfo =
ResultAndType<mozilla::UniquePtr<mozilla::TrackInfo>>;
ResultAndTrackInfo GetTrackInfo(mozilla::TrackInfo::TrackType aType,
size_t aTrackNumber) const;
bool CanSeek() const;
using ResultAndCryptoFile = ResultAndType<const CryptoFile*>;
ResultAndCryptoFile Crypto() const;
using ResultAndIndice = ResultAndType<mozilla::UniquePtr<IndiceWrapper>>;
ResultAndIndice GetTrackIndice(uint32_t aTrackId);
nsresult Parse();
private:
void UpdateCrypto();
Maybe<uint32_t> TrackTypeToGlobalTrackIndex(
mozilla::TrackInfo::TrackType aType, size_t aTrackNumber) const;
CryptoFile mCrypto;
RefPtr<ByteStream> mSource;
StreamAdaptor mSourceAdaptor;
mozilla::UniquePtr<Mp4parseParser, FreeMP4Parser> mParser;
};
} // namespace mozilla
#endif // MP4METADATA_H_