func (f *File) GetProperties() *Properties {
ap := C.taglib_file_audioproperties((*C.TagLib_File)(f))
if ap == nil {
return nil
}
p := Properties{}
p.Length = int(C.taglib_audioproperties_length(ap))
p.Bitrate = int(C.taglib_audioproperties_bitrate(ap))
p.Samplerate = int(C.taglib_audioproperties_samplerate(ap))
p.Channels = int(C.taglib_audioproperties_channels(ap))
return &p
}
// Constructor of Tags
func Read(filename string) (*Tags, error) {
//convert filename to a C-string and make sure to free it afterwards
cfilename := C.CString(filename)
defer C.free(unsafe.Pointer(cfilename))
taglib_file := C.taglib_file_new(cfilename)
defer C.taglib_file_free((*C.TagLib_File)(taglib_file))
if taglib_file == nil {
return nil, fmt.Errorf("Unrecognized filetype or unreadable file.")
}
if C.taglib_file_is_valid(taglib_file) == 0 {
return nil, ErrUnreadableTag{}
}
taglib_tag := C.taglib_file_tag(taglib_file)
if taglib_tag == nil {
return nil, fmt.Errorf("Can't access 'taglib_file' in TagLib library.")
}
taglib_audioprop := C.taglib_file_audioproperties(taglib_file)
if taglib_tag == nil {
return nil, fmt.Errorf("Can't access 'taglib_audioprob' in TagLib library.")
}
p := Properties{
Bitrate: int(C.taglib_audioproperties_bitrate(taglib_audioprop)),
Length: int(C.taglib_audioproperties_length(taglib_audioprop)),
Samplerate: int(C.taglib_audioproperties_samplerate(taglib_audioprop)),
Channels: int(C.taglib_audioproperties_channels(taglib_audioprop)),
}
return &Tags{
Filename: filename,
Title: C.GoString(C.taglib_tag_title(taglib_tag)),
Artist: C.GoString(C.taglib_tag_artist(taglib_tag)),
Album: C.GoString(C.taglib_tag_album(taglib_tag)),
Comment: C.GoString(C.taglib_tag_comment(taglib_tag)),
Genre: C.GoString(C.taglib_tag_genre(taglib_tag)),
Year: int(C.taglib_tag_year(taglib_tag)),
Track: int(C.taglib_tag_track(taglib_tag)),
Properties: p,
}, nil
}
// Returns the number of channels in the audio stream.
func (file *File) Channels() int {
glock.Lock()
defer glock.Unlock()
return int(C.taglib_audioproperties_channels(file.props))
}
