func TestInitialiseFromHeaderBlockWithValidHeaders(t *testing.T) {
buf, reader := bufWrap(id3v2_header)
buf[3] = 2
buf[4] = 0
tag, err := id3v2.ExtractTag(reader)
if err != nil {
t.Error(err)
return
}
assert(t, tag.Version() == "2.0", "expected version 2.0, got", tag.Version())
buf[3] = 3
tag, err = id3v2.ExtractTag(reader)
if err != nil {
t.Error(err)
return
}
assert(t, tag.Version() == "3.0", "expected version 3.0, got", tag.Version())
buf[3] = 4
tag, err = id3v2.ExtractTag(reader)
if err != nil {
t.Error(err)
return
}
assert(t, tag.Version() == "4.0", "expected version 4.0, got", tag.Version())
}
func TestNonSupportedVersionInId3v2HeaderBlock(t *testing.T) {
buf, reader := bufWrap(id3v2_header)
buf[3] = 5
buf[4] = 0
_, err := id3v2.ExtractTag(reader)
assert(t, err != nil, "expected error (wrong ID3v2 version), got nil")
}
// FIXME: use some minimal interface instead of os.File in the argument
// TODO: verify if errors handling (and ignoring) is ok
func ParseFile(raw *os.File, bufferLength int) (*File, os.Error) {
if bufferLength == 0 {
bufferLength = DEFAULT_BUFFER_LENGTH
}
mp3file := &File{
startOffset: -1,
endOffset: -1,
xingOffset: -1,
bitrates: make(map[int]int)}
mp3file.calcLength(raw)
// TODO: try to move all Seek()s into this function
mp3file.id3v1tag, _ = ExtractId3v1Tag(raw)
offset := int64(0)
id3v2tagHeader, _ := id3v2.ExtractTagHeader(raw)
if id3v2tagHeader != nil {
offset = int64(len(id3v2tagHeader)) + int64(id3v2tagHeader.DataLength())
}
err := mp3file.scanFile(raw, offset, bufferLength)
if err != nil {
return nil, err
}
if mp3file.startOffset < 0 {
return nil, os.NewError("No mpegs frames found")
}
mp3file.id3v2tag, _ = id3v2.ExtractTag(raw)
mp3file.extractCustomTag(raw)
return mp3file, nil
}
func TestCalculateCorrectDataLengthsFromHeaderBlock(t *testing.T) {
buf, reader := bufWrap(id3v2_header)
tag, err := id3v2.ExtractTag(reader)
if err != nil {
t.Error(err)
return
}
assert(t, tag.DataLength() == 257, "data length expected 257, got", tag.DataLength())
buf[8] = 0x09
buf[9] = 0x41
tag, err = id3v2.ExtractTag(reader)
if err != nil {
t.Error(err)
return
}
assert(t, tag.DataLength() == 1217, "data length expected 1217, got", tag.DataLength())
}
func loadId3TagFile(fname string) (*id3v2.Tag, os.Error) {
f, err := os.Open(RES_DIR+fname, os.O_RDONLY, 0)
if err != nil {
return nil, err
}
defer f.Close()
tag, err := id3v2.ExtractTag(f)
if err != nil {
return nil, err
}
return tag, nil
}