Add function to determine Mkv element level by ID
Does not cover all element IDs but should be more than sufficient for its purpose.
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@ -315,5 +315,156 @@ const char *matroskaIdName(uint32 matroskaId)
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}
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}
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/*!
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* \brief Returns the level at which elements with the specified \a matroskaId are supposed
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* to occur in a Matroska file.
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*/
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MatroskaElementLevel matroskaIdLevel(uint32 matroskaId)
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{
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using namespace EbmlIds;
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using namespace MatroskaIds;
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switch(matroskaId) {
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case Header:
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case Segment:
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return MatroskaElementLevel::TopLevel;
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case SeekHead:
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case SegmentInfo:
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case Cluster:
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case Tracks:
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case Cues:
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case Attachments:
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case Chapters:
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case Tags:
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return MatroskaElementLevel::Level1;
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case Seek:
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case SegmentUID:
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case SegmentFileName:
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case PrevUID:
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case PrevFileName:
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case NexUID:
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case NextFileName:
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case SegmentFamily:
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case ChapterTranslate:
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case TimeCodeScale:
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case Duration:
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case DateUTC:
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case Title:
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case MuxingApp:
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case WrittingApp:
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case Timecode:
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case SilentTracks:
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case Position:
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case PrevSize:
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case SimpleBlock:
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case BlockGroup:
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case EncryptedBlock:
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case TrackEntry:
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case CuePoint:
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case AttachedFile:
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case EditionEntry:
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case Tag:
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return MatroskaElementLevel::Level2;
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case SeekID:
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case SeekPosition:
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case ChapterTranslateEditionUID:
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case ChapterTranslateCodec:
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case ChapterTranslateID:
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case SilentTrackNumber:
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case BlockVirtual:
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case BlockAdditions:
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case BlockDuration:
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case ReferencePriority:
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case ReferenceBlock:
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case ReferenceVirtual:
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case CodecState:
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case DiscardPadding:
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case Slices:
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case TrackNumber:
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case TrackUID:
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case TrackType:
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case TrackFlagEnabled:
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case TrackFlagDefault:
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case TrackFlagForced:
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case TrackFlagLacing:
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case MinCache:
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case MaxCache:
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case DefaultDuration:
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case DefaultDecodedFieldDuration:
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case TrackTimeCodeScale:
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case TrackOffset:
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case MaxBlockAdditionId:
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case TrackName:
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case TrackLanguage:
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case CodecID:
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case CodecPrivate:
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case CodecName:
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case AttachmentLink:
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case CodecSettings:
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case CodecInfoUrl:
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case CodecDownloadUrl:
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case CodecDecodeAll:
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case TrackOverlay:
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case CodecDelay:
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case SeekPreRoll:
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case TrackTranslate:
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case TrackVideo:
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case TrackAudio:
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case ContentEncodings:
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case CueTime:
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case CueTrackPositions:
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case FileDescription:
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case FileName:
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case FileMimeType:
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case FileData:
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case FileUID:
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case FileReferral:
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case FileUsedStartTime:
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case FileUsedEndTime:
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case EditionUID:
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case EditionFlagHidden:
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case EditionFlagDefault:
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case EditionFlagOrdered:
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case Targets:
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return MatroskaElementLevel::Level3;
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case BlockMore:
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case TimeSlice:
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case ContentEncoding:
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case CueTrack:
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case CueClusterPosition:
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case CueRelativePosition:
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case CueDuration:
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case CueBlockNumber:
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case CueCodecState:
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case CueReference:
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case TargetTypeValue:
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case TargetType:
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case TagTrackUID:
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case TagEditionUID:
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case TagChapterUID:
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case TagAttachmentUID:
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return MatroskaElementLevel::Level4;
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case BlockAddID:
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case BlockAdditional:
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case LaceNumber:
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case FrameNumber:
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case BlockAdditionID:
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case Delay:
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case SliceDuration:
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case ReferenceFrame:
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case ReferenceOffset:
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case ReferenceTimeCode:
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case CueRefTime:
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case CueRefCluster:
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case CueRefNumber:
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case CueRefCodecState:
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return MatroskaElementLevel::Level5;
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case Void:
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case Crc32:
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return MatroskaElementLevel::Global;
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default:
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return MatroskaElementLevel::Unknown;
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}
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}
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}
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@ -489,7 +489,51 @@ enum KnownValues {
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}
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enum class MatroskaElementLevel : byte {
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TopLevel = 0x0,
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Level1,
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Level2,
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Level3,
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Level4,
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Level5,
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Level6,
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Global = 0xFE,
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Unknown = 0xFF,
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};
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constexpr bool operator>(MatroskaElementLevel lhs, MatroskaElementLevel rhs)
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{
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return static_cast<byte>(lhs) < static_cast<byte>(MatroskaElementLevel::Global)
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&& static_cast<byte>(rhs) < static_cast<byte>(MatroskaElementLevel::Global)
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&& static_cast<byte>(lhs) > static_cast<byte>(rhs);
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}
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constexpr bool operator>(byte lhs, MatroskaElementLevel rhs)
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{
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return lhs < static_cast<byte>(MatroskaElementLevel::Global)
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&& static_cast<byte>(rhs) < static_cast<byte>(MatroskaElementLevel::Global)
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&& static_cast<byte>(lhs) > static_cast<byte>(rhs);
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}
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constexpr bool operator<(MatroskaElementLevel lhs, MatroskaElementLevel rhs)
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{
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return static_cast<byte>(lhs) < static_cast<byte>(MatroskaElementLevel::Global)
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&& static_cast<byte>(rhs) < static_cast<byte>(MatroskaElementLevel::Global)
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&& static_cast<byte>(lhs) < static_cast<byte>(rhs);
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}
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constexpr bool operator>=(MatroskaElementLevel lhs, MatroskaElementLevel rhs)
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{
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return lhs == rhs || lhs > rhs;
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}
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constexpr bool operator<=(MatroskaElementLevel lhs, MatroskaElementLevel rhs)
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{
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return lhs == rhs || lhs < rhs;
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}
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TAG_PARSER_EXPORT const char *matroskaIdName(uint32 matroskaId);
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TAG_PARSER_EXPORT MatroskaElementLevel matroskaIdLevel(uint32 matroskaId);
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}
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