Bug 1195723: [flac] P10. Add media sniffer for flac file. r=kamidphish

This only supports flac with a STREAMINFO header.

MozReview-Commit-ID: FaT9N6xJDPY

--HG--
extra : rebase_source : faf16192bf2ca57a9ca6ea6061f1436f7b032b00

netwerk/mime/nsMimeTypes.h

@@ -87,6 +87,7 @@
 #define AUDIO_3GPP2                         "audio/3gpp2"
 #define AUDIO_MIDI                          "audio/x-midi"
 #define AUDIO_MATROSKA                      "audio/x-matroska"
+#define AUDIO_FLAC                          "audio/flac"
 
 #define BINARY_OCTET_STREAM                 "binary/octet-stream"
 

toolkit/components/mediasniffer/nsMediaSniffer.cpp

@@ -33,7 +33,9 @@ nsMediaSnifferEntry nsMediaSniffer::sSnifferEntries[] = {
   // The string RIFF, followed by four bytes, followed by the string WAVE
   PATTERN_ENTRY("\xFF\xFF\xFF\xFF\x00\x00\x00\x00\xFF\xFF\xFF\xFF", "RIFF\x00\x00\x00\x00WAVE", AUDIO_WAV),
   // mp3 with ID3 tags, the string "ID3".
-  PATTERN_ENTRY("\xFF\xFF\xFF", "ID3", AUDIO_MP3)
+  PATTERN_ENTRY("\xFF\xFF\xFF", "ID3", AUDIO_MP3),
+  // FLAC with standard header
+  PATTERN_ENTRY("\xFF\xFF\xFF\xFF", "fLaC", AUDIO_FLAC)
 };
 
 // For a complete list of file types, see http://www.ftyps.com/index.html