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starsky/starsky.foundation.thumbnailmeta/Helpers/TagLibSharpAbstractions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,28 +1,29 @@ | ||
| using System.IO; | ||
| using File = TagLib.File; | ||
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| namespace starsky.foundation.thumbnailmeta.Helpers; | ||
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| public class TagLibSharpAbstractions | ||
| { | ||
| public class MemoryFileAbstraction : TagLib.File.IFileAbstraction | ||
| public class FileBytesAbstraction : File.IFileAbstraction | ||
| { | ||
| readonly Stream stream; | ||
|
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| public MemoryFileAbstraction (Stream data) | ||
| public FileBytesAbstraction(string name, Stream stream) | ||
| { | ||
| stream = data; | ||
| Name = name; | ||
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| ReadStream = stream; | ||
| WriteStream = stream; | ||
| } | ||
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| public string Name => "MEMORY"; | ||
| public void CloseStream(Stream stream) | ||
| { | ||
| stream.Dispose(); | ||
| } | ||
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| public Stream ReadStream => stream; | ||
| public string Name { get; } | ||
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| public Stream WriteStream => stream; | ||
| public Stream ReadStream { get; } | ||
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| public void CloseStream (Stream stream) | ||
| { | ||
| // This causes a stackoverflow | ||
| //stream?.Close(); | ||
| } | ||
| public Stream WriteStream { get; } | ||
| } | ||
| } |
158 changes: 158 additions & 0 deletions
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starsky/starsky.foundation.thumbnailmeta/ServicesPreviewSize/Helpers/SonyMakersNoteParser.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| using System; | ||
| using System.IO; | ||
| using System.Text; | ||
|
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| public class SonyMakerNotesParser | ||
| { | ||
| public static void Main() | ||
| { | ||
| var imagePath = "your_image.jpg"; | ||
| ParseSonyMakerNotes(imagePath); | ||
| } | ||
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| public static void ParseSonyMakerNotes(string imagePath) | ||
| { | ||
| using ( var fs = new FileStream(imagePath, FileMode.Open, FileAccess.Read) ) | ||
| using ( var reader = new BinaryReader(fs) ) | ||
| { | ||
| if ( !IsJpeg(reader) ) | ||
| { | ||
| Console.WriteLine("Not a valid JPEG file."); | ||
| return; | ||
| } | ||
|
|
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| // Search for the APP1 (Exif) segment | ||
| while ( reader.BaseStream.Position < reader.BaseStream.Length ) | ||
| { | ||
| var marker1 = reader.ReadByte(); | ||
| var marker2 = reader.ReadByte(); | ||
|
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| // Check for known markers: APP1 (Exif), APP2 (Sony), etc. | ||
| if (marker1 == 0xFF) | ||
| { | ||
| // If it's APP1 or APP2 segment (common for Exif or Sony MakerNotes) | ||
| if (marker2 == 0xE1 || marker2 == 0xE2) | ||
| { | ||
| ushort segmentLength = ReadBigEndianUInt16(reader); | ||
| byte[] segmentData = reader.ReadBytes(segmentLength - 2); | ||
| Console.WriteLine($"Found Segment 0x{marker2:X2}, Length: {segmentLength}"); | ||
|
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| // Check for Exif or other known formats inside the segment | ||
| if (marker2 == 0xE1) // APP1 - Exif | ||
| { | ||
| Console.WriteLine("Found Exif Segment. Skipping."); | ||
| } | ||
| else if (marker2 == 0xE2) // APP2 - Sony MakerNotes | ||
| { | ||
| Console.WriteLine("Found Sony MakerNotes Segment."); | ||
| // Here you can further inspect the data | ||
| } | ||
| } | ||
| else | ||
| { | ||
| // Skip over other segments | ||
| ushort segmentLength = ReadBigEndianUInt16(reader); | ||
| reader.BaseStream.Seek(segmentLength - 2, SeekOrigin.Current); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| // Skip over any non-marked sections | ||
| reader.BaseStream.Seek(1, SeekOrigin.Current); | ||
| } | ||
|
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|
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| // Check for APP1 (Exif) segment | ||
| if ( marker1 == 0xFF && marker2 == 0xE1 ) | ||
| { | ||
| var segmentLength = ReadBigEndianUInt16(reader); | ||
| reader.BaseStream.Seek(segmentLength - 2, | ||
| SeekOrigin.Current); // Skip the rest of the segment | ||
|
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| // Read Exif Header bytes | ||
| var exifHeader = reader.ReadBytes(6); // Read 6 bytes | ||
| Console.WriteLine("Exif Header (raw): " + BitConverter.ToString(exifHeader)); | ||
|
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| // Check for "Exif" in the header | ||
| if ( Encoding.ASCII.GetString(exifHeader, 0, 4) == "Exif" ) | ||
| { | ||
| Console.WriteLine("Exif Header Found."); | ||
| // Parse TIFF header | ||
| reader.BaseStream.Seek(8, SeekOrigin.Current); // Skip TIFF header | ||
| var tagCount = ReadBigEndianUInt16(reader); | ||
|
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| // Search for Sony's MakerNotes tag | ||
| for ( var i = 0; i < tagCount; i++ ) | ||
| { | ||
| var tagId = ReadBigEndianUInt16(reader); | ||
| var tagType = ReadBigEndianUInt16(reader); | ||
| uint tagCountData = ReadBigEndianUInt16(reader); | ||
| uint tagValue = ReadBigEndianUInt16(reader); | ||
|
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| // Check for MakerNotes or PreviewImage (Sony-specific tags) | ||
| if ( tagId == 0x927C ) // Sony MakerNotes tag ID | ||
| { | ||
| Console.WriteLine("Found MakerNotes."); | ||
| reader.BaseStream.Seek(tagValue, | ||
| SeekOrigin.Begin); // Seek to MakerNotes section | ||
|
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| // Now manually process MakerNotes content | ||
| ParseMakerNotes(reader); | ||
| break; // Exit the loop after processing the MakerNotes | ||
| } | ||
| } | ||
| } | ||
|
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| break; // Exit the loop after processing the Exif section | ||
| } | ||
| else | ||
| { | ||
| // Skip over other segments | ||
| var segmentLength = ReadBigEndianUInt16(reader); | ||
| reader.BaseStream.Seek(segmentLength - 2, SeekOrigin.Current); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| private static void ParseMakerNotes(BinaryReader reader) | ||
| { | ||
| // Example parsing: Read and interpret Sony MakerNotes data | ||
| // Sony's MakerNotes may store preview image data in specific offsets, which you would need to find. | ||
|
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| // Read bytes from the MakerNotes section only if there are enough bytes remaining | ||
| var remainingBytes = ( int ) ( reader.BaseStream.Length - reader.BaseStream.Position ); | ||
| if ( remainingBytes > 0 ) | ||
| { | ||
| var makerNotesData = | ||
| reader.ReadBytes(Math.Min(remainingBytes, | ||
| 128)); // Read bytes, ensure not exceeding remaining stream length | ||
|
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| // Inspect these bytes manually to see where the PreviewImage data might be stored | ||
| Console.WriteLine(BitConverter.ToString(makerNotesData, 0, | ||
| Math.Min(makerNotesData.Length, 64))); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine("No data available to read from MakerNotes."); | ||
| } | ||
| } | ||
|
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| private static bool IsJpeg(BinaryReader reader) | ||
| { | ||
| reader.BaseStream.Seek(0, SeekOrigin.Begin); | ||
| return reader.ReadByte() == 0xFF && reader.ReadByte() == 0xD8; | ||
| } | ||
|
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| private static ushort ReadBigEndianUInt16(BinaryReader reader) | ||
| { | ||
| if ( reader.BaseStream.Position + 2 <= reader.BaseStream.Length ) | ||
| { | ||
| var highByte = reader.ReadByte(); | ||
| var lowByte = reader.ReadByte(); | ||
| return ( ushort ) ( ( highByte << 8 ) | lowByte ); | ||
| } | ||
|
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| throw new EndOfStreamException("Unable to read beyond the end of the stream."); | ||
| } | ||
| } |
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