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#include "tag.h"
#include <id3tag.h>
static void tag_add(struct tag *tag, enum tag_type type, const gchar *value) {
struct tag_field *field = g_new0(struct tag_field, 1);
if(field == 0) {
g_error("tag_add: g_new0 returned NULL");
}
field->type = type;
field->string = g_strdup(value);
tag->fields = g_slist_prepend(tag->fields, field);
}
static void tag_add_string(struct tag *tag, struct id3_tag *id3tag,
enum tag_type type, const gchar *id) {
struct id3_frame *frame = id3_tag_findframe(id3tag, id, 0);
if(frame == NULL) {
return;
}
if(frame->nfields != 2) {
g_debug("unexpected nfields value");
return;
}
const union id3_field *field = id3_frame_field(frame, 1);
guint nstrings = id3_field_getnstrings(field);
for(guint i = 0; i < nstrings; i++) {
const id3_ucs4_t *ucs4 = id3_field_getstrings(field, i);
if(ucs4 == NULL) {
g_warning("ucs4 is NULL");
continue;
}
id3_utf8_t *utf8 = id3_ucs4_utf8duplicate(ucs4);
tag_add(tag, type, (gchar*)utf8);
g_free(utf8);
}
}
/* TODO: support other tag formats beside ID3 */
struct tag *tag_read(const gchar *path) {
struct id3_file *file = id3_file_open(path, ID3_FILE_MODE_READONLY);
if(file == NULL) {
g_warning("file is NULL");
return NULL;
}
struct id3_tag *id3tag = id3_file_tag(file);
if(id3tag == NULL) {
g_debug("tag is NULL");
return NULL;
}
struct tag *tag = g_new0(struct tag, 1);
/* TODO: add more interesting data */
tag_add_string(tag, id3tag, TAG_TYPE_ARTIST, ID3_FRAME_ARTIST);
tag_add_string(tag, id3tag, TAG_TYPE_ALBUM, ID3_FRAME_ALBUM);
tag_add_string(tag, id3tag, TAG_TYPE_TITLE, ID3_FRAME_TITLE);
id3_file_close(file);
return tag;
}
const gchar *tag_get(struct tag *tag, enum tag_type type) {
for(GSList *node = tag->fields; node; node = g_slist_next(node)) {
struct tag_field *field = node->data;
if(field->type == type) {
return field->string;
}
}
return NULL;
}
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