Merge branch 'master' of https://github.com/neilharvey/FileSignatures

src/FileSignatures/Formats/Amr.cs

@@ -0,0 +1,11 @@
+namespace FileSignatures.Formats
+{
+    /// <summary>
+    /// Specifies the format of an Adaptive Multi-Rate ACELP (Algebraic Code Excited Linear Prediction) Codec file
+    /// Commonly audio format with GSM cell phones. (See RFC 4867.)
+    /// </summary>
+    public class Amr : FileFormat
+    {
+        public Amr() : base(new byte[] { 0x23, 0x21, 0x41, 0x4D, 0x52 }, "audio/amr", "amr") { }
+    }
+}

src/FileSignatures/Formats/Mpeg3.cs

@@ -0,0 +1,10 @@
+namespace FileSignatures.Formats
+{
+    /// <summary>
+    /// Specifies the format of a MPEG-1 Audio Layer 3 (MP3) audio file
+    /// </summary>
+    public class Mpeg3 : FileFormat
+    {
+        public Mpeg3() : base(new byte[] { 0x49, 0x44, 0x33 }, "audio/mpeg", "mp3") { }
+    }
+}

src/FileSignatures/Formats/Ogg.cs

@@ -0,0 +1,10 @@
+namespace FileSignatures.Formats
+{
+    /// <summary>
+    /// Specifies the format of an Ogg Vorbis Codec compressed Multimedia file
+    /// </summary>
+    public class Ogg : FileFormat
+    {
+        public Ogg() : base(new byte[] { 0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, "audio/ogg", "ogg") { }
+    }
+}

test/FileSignatures.Tests/FunctionalTests.cs

@@ -43,6 +43,9 @@ public class FunctionalTests
         [InlineData("test.mov", "video/quicktime")]
         [InlineData("test.3gp", "video/3gpp")]
         [InlineData("test.vcf", "text/vcard")]
+        [InlineData("test.mp3", "audio/mpeg")]
+        [InlineData("test.ogg", "audio/ogg")]
+        [InlineData("test.amr", "audio/amr")]
         public void SamplesAreRecognised(string sample, string expected)
         {
             var result = InspectSample(sample);