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Add FFFA to magic bytes for MP3. Fixes #10 #11

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Add FFFA to magic bytes for MP3. Fixes #10 #11

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4ed0d4c
Add FFFA to magic bytes for MP3.
maugre Jul 13, 2016
bf88728
Add MP3 file type tests based on MP3 frame headers (i.e. where file l…
maugre Jul 14, 2016
9a5d90d
Add sample.mp3 to fixtures and add it to match_test.
maugre Jul 14, 2016
018f6ef
Check the first byte for MP3 only once instead of for each variation …
maugre Jul 16, 2016
dab433e
Change the comment for MP3 match so it makes more sense.
maugre Jul 16, 2016
d7d57ea
Merge branch 'master' into master
maugre Mar 5, 2017
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4 changes: 4 additions & 0 deletions filetype_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,8 @@ func TestIsType(t *testing.T) {
{[]byte{0xFF, 0xD8, 0xFF}, types.Get("jpg"), true},
{[]byte{0xFF, 0xD8, 0x00}, types.Get("jpg"), false},
{[]byte{0x89, 0x50, 0x4E, 0x47}, types.Get("png"), true},
{[]byte{0xFF, 0xFA, 0x90}, types.Get("mp3"), true},
{[]byte{0xFF, 0xFB, 0x90}, types.Get("mp3"), true},
}

for _, test := range cases {
Expand Down Expand Up @@ -70,6 +72,7 @@ func TestIsSupported(t *testing.T) {
{"abc", false},
{"png", true},
{"mp4", true},
{"mp3", true},
{"", false},
}

Expand All @@ -89,6 +92,7 @@ func TestIsMIMESupported(t *testing.T) {
{"foo/bar", false},
{"image/png", true},
{"video/mpeg", true},
{"audio/mpeg", true},
}

for _, test := range cases {
Expand Down
Binary file added fixtures/sample.mp3
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2 changes: 2 additions & 0 deletions match_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ func TestMatchFile(t *testing.T) {
{"tar"},
{"tif"},
{"mp4"},
{"mp3"},
}

for _, test := range cases {
Expand Down Expand Up @@ -137,6 +138,7 @@ func TestMatchesMap(t *testing.T) {
{[]byte{0xFF, 0xD8, 0xFF}, true},
{[]byte{0x89, 0x50, 0x4E, 0x47}, true},
{[]byte{0xFF, 0x0, 0x0}, false},
{[]byte{0xFF, 0xFC, 0x90}, false},
}

for _, test := range cases {
Expand Down
5 changes: 3 additions & 2 deletions matchers/audio.go
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Expand Up @@ -28,8 +28,9 @@ func Midi(buf []byte) bool {

func Mp3(buf []byte) bool {
return len(buf) > 2 &&
((buf[0] == 0x49 && buf[1] == 0x44 && buf[2] == 0x33) ||
(buf[0] == 0xFF && buf[1] == 0xfb))
((buf[0] == 0x49 && buf[1] == 0x44 && buf[2] == 0x33) || // ID3v2
// Final bit (has crc32) may be or may not be set.
(buf[0] == 0xFF && (buf[1] == 0xFA || buf[1] == 0xFB)))
}

func M4a(buf []byte) bool {
Expand Down