void LibMadWrapper::buildMetadata() noexcept
{
// TODO we have to find ID3 tag in the mpeg file, but this should be done while trying decoding mpeg-frame-headers
// whenever libmad returns lost_sync error, there might be a id3 tag
struct id3_file *s = id3_file_open(this->Filename.c_str(), ID3_FILE_MODE_READONLY);
if (s == nullptr)
{
return;
}
struct id3_tag *t = id3_file_tag(s);
if (t == nullptr)
{
id3_file_close(s);
return;
}
this->Metadata.Title = id3_get_tag(t, ID3_FRAME_TITLE);
this->Metadata.Artist = id3_get_tag(t, ID3_FRAME_ARTIST);
this->Metadata.Album = id3_get_tag(t, ID3_FRAME_ALBUM);
this->Metadata.Year = id3_get_tag(t, ID3_FRAME_YEAR);
this->Metadata.Genre = id3_get_tag(t, ID3_FRAME_GENRE);
this->Metadata.Track = id3_get_tag(t, ID3_FRAME_TRACK);
this->Metadata.Comment = id3_get_tag(t, ID3_FRAME_COMMENT);
id3_file_close(s);
}
static int parse_id3( char *names[], const struct id3_tag *tag)
{
int found, i;
found = 0;
/* Get ID3 tag if available, 30 chars except 4 for year */
for(i=0; i<=5; i++)
{
names[i] = NULL;
names[i] = id3_get_tag(tag, info_id3[i].id, (i==3) ? 4 : 30);
if( names[i] != NULL && names[i][0] != '\0' )
found = 1;
}
return (found);
}
/*
Only shows ID3 tags if at least one of
TITLE, ARTIST, ALBUM, YEAR, COMMENT, GENRE
is present.
*/
static int show_id3(struct id3_tag const *tag)
{
unsigned int i;
int print = 0;
char emptystring[31];
char *names[6];
struct {
int index;
char const *id;
char const *name;
} const info[] = {
{ 0, ID3_FRAME_TITLE, "Title : " },
{ 1, ID3_FRAME_ARTIST, " Artist: " },
{ 2, ID3_FRAME_ALBUM, "Album : " },
{ 3, ID3_FRAME_YEAR, " Year : " },
{ 4, ID3_FRAME_COMMENT,"Comment: " },
{ 5, ID3_FRAME_GENRE, " Genre : " }
};
memset (emptystring, ' ', 30);
emptystring[30] = '\0';
/* Get ID3 tag if available, 30 chars except 4 for year */
for (i=0; i<=5; i++) {
names[i] = NULL;
names[i] = id3_get_tag(tag, info[i].id, (i==3) ? 4 : 30);
}
for (i=0; i<=5; i++) {
if (names[i]) {
print = 1;
break;
}
}
if (!print) {
return 0;
}
if (options.opt & MPG321_REMOTE_PLAY)
{
printf("@I ID3:");
for (i=0; i<=5; i++)
{
if(!names[i])
{
printf(emptystring);
}
else
{
printf("%s", names[i]);
free(names[i]);
}
}
printf("\n");
}
else
{
/* Emulate mpg123 original behaviour */
for (i=0; i<=5; i++) {
fprintf (stderr, "%s", info[i].name);
if (!names[i]) {
fprintf (stderr, emptystring);
} else {
fprintf (stderr, "%s", names[i]);
free (names[i]);
}
if (i%2) fprintf (stderr, "\n");
}
}
return 1;
}
