/*
* Function id3_get_text (frame)
*
* Return string contents of frame.
*
*/
char *id3_get_text(struct id3_frame *frame)
{
int offset = 0;
/* Type check */
if (frame->fr_desc->fd_idstr[0] != 'T')
return NULL;
/* Check if frame is compressed */
if (id3_decompress_frame(frame) == -1)
return NULL;
if (frame->fr_desc->fd_id == ID3_TXXX)
{
/*
* This is a user defined text frame. Skip the description.
*/
offset = id3_string_size(ID3_TEXT_FRAME_ENCODING(frame),
ID3_TEXT_FRAME_PTR(frame));
if (offset >= frame->fr_size)
return NULL;
}
return id3_string_decode(ID3_TEXT_FRAME_ENCODING(frame),
ID3_TEXT_FRAME_PTR(frame) + offset);
}
/*
* Function id3_get_comment(frame)
*
* Return string contents of a comment frame.
*
*/
char *id3_get_comment(struct id3_frame *frame)
{
int offset;
/* Type check */
if (frame->fr_desc->fd_id != ID3_COMM)
return NULL;
/* Check if frame is compressed */
if (id3_decompress_frame(frame) == -1)
return NULL;
if (frame->fr_size < 5)
return NULL;
/* Skip language id */
offset = 3;
/* Skip the description */
offset += id3_string_size(ID3_TEXT_FRAME_ENCODING(frame),
ID3_TEXT_FRAME_PTR(frame) + offset);
if (offset >= frame->fr_size)
return NULL;
return id3_string_decode(ID3_TEXT_FRAME_ENCODING(frame),
ID3_TEXT_FRAME_PTR(frame) + offset);
}
static GSList* id3_get_content_v24(struct id3_frame *frame)
{
GSList *list = NULL;
int offset = 0;
while (offset < frame->fr_size - 1)
{
int num;
char *input, *endptr;
input = id3_string_decode(ID3_TEXT_FRAME_ENCODING(frame),
ID3_TEXT_FRAME_PTR(frame) + offset);
if (!input)
break;
/* Get ID3v1 genre number */
num = strtol(input, &endptr, 10);
if (endptr && endptr != input && *endptr == '\0' &&
num >= 0 && num < 256)
list = push_element(list, num, NULL);
else if (!strcmp(input, "RX"))
list = push_element(list, -1, _("Remix"));
else if (!strcmp(input, "CR"))
list = push_element(list, -1, _("Cover"));
else
list = push_element(list, -1, input);
offset += id3_string_size(ID3_TEXT_FRAME_ENCODING(frame),
ID3_TEXT_FRAME_PTR(frame) + offset);
}
return list;
}
