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