1 files changed, 116 insertions, 0 deletions
diff --git a/dom/media/mp4/MP4Metadata.h b/dom/media/mp4/MP4Metadata.h
new file mode 100644
index 0000000000..e900fbedc3
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+++ b/dom/media/mp4/MP4Metadata.h
@@ -0,0 +1,116 @@
+/* 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 "MediaData.h"
+#include "MediaInfo.h"
+#include "MediaResult.h"
+#include "ByteStream.h"
+#include "mp4parse.h"
+#include "SampleIterator.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, MP4SampleIndex::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) const;
+
+  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_