Remove not needed GetBitsPerSample method

src/ImageSharp/Formats/Tiff/TiffBitsPerSample.cs

@@ -2,7 +2,6 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using SixLabors.ImageSharp.Formats.Tiff.Constants;
 
 namespace SixLabors.ImageSharp.Formats.Tiff
 {
@@ -112,119 +111,6 @@ namespace SixLabors.ImageSharp.Formats.Tiff
             return new[] { this.Channel0, this.Channel1, this.Channel2 };
         }
 
-        /// <summary>
-        /// Maps an array of bits per sample to a concrete struct value.
-        /// </summary>
-        /// <param name="bitsPerSample">The bits per sample array.</param>
-        /// <returns>TiffBitsPerSample enum value.</returns>
-        public static TiffBitsPerSample? GetBitsPerSample(ushort[] bitsPerSample)
-        {
-            switch (bitsPerSample.Length)
-            {
-                case 3:
-                    if (bitsPerSample[2] == TiffConstants.BitsPerSampleRgb16Bit.Channel2 &&
-                        bitsPerSample[1] == TiffConstants.BitsPerSampleRgb16Bit.Channel1 &&
-                        bitsPerSample[0] == TiffConstants.BitsPerSampleRgb16Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSampleRgb16Bit;
-                    }
-
-                    if (bitsPerSample[2] == TiffConstants.BitsPerSampleRgb14Bit.Channel2 &&
-                        bitsPerSample[1] == TiffConstants.BitsPerSampleRgb14Bit.Channel1 &&
-                        bitsPerSample[0] == TiffConstants.BitsPerSampleRgb14Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSampleRgb14Bit;
-                    }
-
-                    if (bitsPerSample[2] == TiffConstants.BitsPerSampleRgb12Bit.Channel2 &&
-                        bitsPerSample[1] == TiffConstants.BitsPerSampleRgb12Bit.Channel1 &&
-                        bitsPerSample[0] == TiffConstants.BitsPerSampleRgb12Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSampleRgb12Bit;
-                    }
-
-                    if (bitsPerSample[2] == TiffConstants.BitsPerSampleRgb10Bit.Channel2 &&
-                        bitsPerSample[1] == TiffConstants.BitsPerSampleRgb10Bit.Channel1 &&
-                        bitsPerSample[0] == TiffConstants.BitsPerSampleRgb10Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSampleRgb10Bit;
-                    }
-
-                    if (bitsPerSample[2] == TiffConstants.BitsPerSampleRgb8Bit.Channel2 &&
-                        bitsPerSample[1] == TiffConstants.BitsPerSampleRgb8Bit.Channel1 &&
-                        bitsPerSample[0] == TiffConstants.BitsPerSampleRgb8Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSampleRgb8Bit;
-                    }
-
-                    if (bitsPerSample[2] == TiffConstants.BitsPerSampleRgb4Bit.Channel2 &&
-                        bitsPerSample[1] == TiffConstants.BitsPerSampleRgb4Bit.Channel1 &&
-                        bitsPerSample[0] == TiffConstants.BitsPerSampleRgb4Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSampleRgb4Bit;
-                    }
-
-                    if (bitsPerSample[2] == TiffConstants.BitsPerSampleRgb2Bit.Channel2 &&
-                        bitsPerSample[1] == TiffConstants.BitsPerSampleRgb2Bit.Channel1 &&
-                        bitsPerSample[0] == TiffConstants.BitsPerSampleRgb2Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSampleRgb2Bit;
-                    }
-
-                    break;
-
-                case 1:
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample1Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample1Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample2Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample2Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample4Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample4Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample6Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample6Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample8Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample8Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample10Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample10Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample12Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample12Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample14Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample14Bit;
-                    }
-
-                    if (bitsPerSample[0] == TiffConstants.BitsPerSample16Bit.Channel0)
-                    {
-                        return TiffConstants.BitsPerSample16Bit;
-                    }
-
-                    break;
-            }
-
-            return null;
-        }
-
         /// <summary>
         /// Gets the bits per pixel for the given bits per sample.
         /// </summary>

src/ImageSharp/Formats/Tiff/TiffFrameMetadata.cs

@@ -77,7 +77,12 @@ namespace SixLabors.ImageSharp.Formats.Tiff
         {
             if (profile != null)
             {
-                meta.BitsPerSample = profile.GetValue(ExifTag.BitsPerSample) != null ? TiffBitsPerSample.GetBitsPerSample(profile.GetValue(ExifTag.BitsPerSample)?.Value) : null;
+                ushort[] bitsPerSampleValue = profile.GetValue(ExifTag.BitsPerSample)?.Value;
+                if (bitsPerSampleValue != null && TiffBitsPerSample.TryParse(bitsPerSampleValue, out TiffBitsPerSample bitsPerSample))
+                {
+                    meta.BitsPerSample = bitsPerSample;
+                }
+
                 meta.BitsPerPixel = meta.BitsPerSample?.BitsPerPixel();
                 meta.Compression = (TiffCompression?)profile.GetValue(ExifTag.Compression)?.Value;
                 meta.PhotometricInterpretation = (TiffPhotometricInterpretation?)profile.GetValue(ExifTag.PhotometricInterpretation)?.Value;