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Commit 09571fcc authored by Max Kellermann's avatar Max Kellermann
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tag_id3: splitted function tag_id3_import_frame()

Splitted tag_id3_import_frame() into two specialized functions: tag_id3_import_text() and tag_id3_import_comment(). Use id3_frame_field() instead of directly accessing id3_frame.fields.
parent c7563a57
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Showing with 91 additions and 119 deletions
src/tag_id3.c
View file @ 09571fcc
......@@ -119,9 +119,16 @@ import_id3_string(bool is_id3v1, const id3_ucs4_t *ucs4, enum tag_type type)
return utf8_stripped;
}
/**
* Import a "Text information frame" (ID3v2.4.0 section 4.2). It
* contains 2 fields:
*
* - encoding
* - string list
*/
static void
tag_id3_import_frame(struct tag *dest, struct id3_tag *tag, const char *id,
enum tag_type type)
tag_id3_import_text(struct tag *dest, struct id3_tag *tag, const char *id,
enum tag_type type)
{
struct id3_frame const *frame;
id3_ucs4_t const *ucs4;
......@@ -130,110 +137,75 @@ tag_id3_import_frame(struct tag *dest, struct id3_tag *tag, const char *id,
unsigned int nstrings, i;
frame = id3_tag_findframe(tag, id, 0);
/* Check frame */
if (!frame)
{
if (frame == NULL || frame->nfields != 2)
return;
}
/* Check fields in frame */
if(frame->nfields == 0)
{
g_debug("Frame has no fields");
/* check the encoding field */
field = id3_frame_field(frame, 0);
if (field == NULL || field->type != ID3_FIELD_TYPE_TEXTENCODING)
return;
}
/* Starting with T is a stringlist */
if (id[0] == 'T')
{
/* This one contains 2 fields:
* 1st: Text encoding
* 2: Stringlist
* Shamefully this isn't the RL case.
* But I am going to enforce it anyway.
*/
if(frame->nfields != 2)
{
g_debug("Invalid number '%i' of fields for TXX frame",
frame->nfields);
return;
}
field = &frame->fields[0];
/**
* First field is encoding field.
* This is ignored by mpd.
*/
if(field->type != ID3_FIELD_TYPE_TEXTENCODING)
{
g_debug("Expected encoding, found: %i",
field->type);
}
/* Process remaining fields, should be only one */
field = &frame->fields[1];
/* Encoding field */
if(field->type == ID3_FIELD_TYPE_STRINGLIST) {
/* Get the number of strings available */
nstrings = id3_field_getnstrings(field);
for (i = 0; i < nstrings; i++) {
ucs4 = id3_field_getstrings(field,i);
if(!ucs4)
continue;
utf8 = import_id3_string(tag_is_id3v1(tag),
ucs4, type);
if(!utf8)
continue;
tag_add_item(dest, type, (char *)utf8);
g_free(utf8);
}
}
else {
g_warning("Field type not processed: %i",
(int)id3_field_gettextencoding(field));
}
}
/* A comment frame */
else if(!strcmp(ID3_FRAME_COMMENT, id))
{
/* A comment frame is different... */
/* 1st: encoding
* 2nd: Language
* 3rd: String
* 4th: FullString.
* The 'value' we want is in the 4th field
*/
if(frame->nfields == 4)
{
/* for now I only read the 4th field, with the fullstring */
field = &frame->fields[3];
if(field->type == ID3_FIELD_TYPE_STRINGFULL)
{
ucs4 = id3_field_getfullstring(field);
if(ucs4)
{
utf8 = import_id3_string(tag_is_id3v1(tag),
ucs4, type);
if(utf8)
{
tag_add_item(dest, type, (char *)utf8);
g_free(utf8);
}
}
}
else
{
g_debug("4th field in comment frame differs from expected, got '%i': ignoring",
field->type);
}
}
else
{
g_debug("Invalid 'comments' tag, got '%i' fields instead of 4",
frame->nfields);
}
/* process the value(s) */
field = id3_frame_field(frame, 1);
if (field == NULL || field->type != ID3_FIELD_TYPE_STRINGLIST)
return;
/* Get the number of strings available */
nstrings = id3_field_getnstrings(field);
for (i = 0; i < nstrings; i++) {
ucs4 = id3_field_getstrings(field, i);
if (ucs4 == NULL)
continue;
utf8 = import_id3_string(tag_is_id3v1(tag),
ucs4, type);
if (utf8 == NULL)
continue;
tag_add_item(dest, type, (char *)utf8);
g_free(utf8);
}
/* Unsupported */
else
g_debug("Unsupported tag type requrested");
}
/**
* Import a "Comment frame" (ID3v2.4.0 section 4.10). It
* contains 4 fields:
*
* - encoding
* - language
* - string
* - full string (we use this one)
*/
static void
tag_id3_import_comment(struct tag *dest, struct id3_tag *tag, const char *id,
enum tag_type type)
{
struct id3_frame const *frame;
id3_ucs4_t const *ucs4;
id3_utf8_t *utf8;
union id3_field const *field;
frame = id3_tag_findframe(tag, id, 0);
if (frame == NULL || frame->nfields != 4)
return;
/* for now I only read the 4th field, with the fullstring */
field = id3_frame_field(frame, 3);
if (field == NULL)
return;
ucs4 = id3_field_getfullstring(field);
if (ucs4 == NULL)
return;
utf8 = import_id3_string(tag_is_id3v1(tag), ucs4, type);
if (utf8 == NULL)
return;
tag_add_item(dest, type, (char *)utf8);
g_free(utf8);
}
/**
......@@ -339,23 +311,23 @@ struct tag *tag_id3_import(struct id3_tag * tag)
{
struct tag *ret = tag_new();
tag_id3_import_frame(ret, tag, ID3_FRAME_ARTIST, TAG_ITEM_ARTIST);
tag_id3_import_frame(ret, tag, ID3_FRAME_ALBUM_ARTIST,
TAG_ITEM_ALBUM_ARTIST);
tag_id3_import_frame(ret, tag, ID3_FRAME_ARTIST_SORT,
TAG_ARTIST_SORT);
tag_id3_import_frame(ret, tag, ID3_FRAME_ALBUM_ARTIST_SORT,
TAG_ALBUM_ARTIST_SORT);
tag_id3_import_frame(ret, tag, ID3_FRAME_TITLE, TAG_ITEM_TITLE);
tag_id3_import_frame(ret, tag, ID3_FRAME_ALBUM, TAG_ITEM_ALBUM);
tag_id3_import_frame(ret, tag, ID3_FRAME_TRACK, TAG_ITEM_TRACK);
tag_id3_import_frame(ret, tag, ID3_FRAME_YEAR, TAG_ITEM_DATE);
tag_id3_import_frame(ret, tag, ID3_FRAME_GENRE, TAG_ITEM_GENRE);
tag_id3_import_frame(ret, tag, ID3_FRAME_COMPOSER, TAG_ITEM_COMPOSER);
tag_id3_import_frame(ret, tag, "TPE3", TAG_ITEM_PERFORMER);
tag_id3_import_frame(ret, tag, "TPE4", TAG_ITEM_PERFORMER);
tag_id3_import_frame(ret, tag, ID3_FRAME_COMMENT, TAG_ITEM_COMMENT);
tag_id3_import_frame(ret, tag, ID3_FRAME_DISC, TAG_ITEM_DISC);
tag_id3_import_text(ret, tag, ID3_FRAME_ARTIST, TAG_ITEM_ARTIST);
tag_id3_import_text(ret, tag, ID3_FRAME_ALBUM_ARTIST,
TAG_ITEM_ALBUM_ARTIST);
tag_id3_import_text(ret, tag, ID3_FRAME_ARTIST_SORT,
TAG_ARTIST_SORT);
tag_id3_import_text(ret, tag, ID3_FRAME_ALBUM_ARTIST_SORT,
TAG_ALBUM_ARTIST_SORT);
tag_id3_import_text(ret, tag, ID3_FRAME_TITLE, TAG_ITEM_TITLE);
tag_id3_import_text(ret, tag, ID3_FRAME_ALBUM, TAG_ITEM_ALBUM);
tag_id3_import_text(ret, tag, ID3_FRAME_TRACK, TAG_ITEM_TRACK);
tag_id3_import_text(ret, tag, ID3_FRAME_YEAR, TAG_ITEM_DATE);
tag_id3_import_text(ret, tag, ID3_FRAME_GENRE, TAG_ITEM_GENRE);
tag_id3_import_text(ret, tag, ID3_FRAME_COMPOSER, TAG_ITEM_COMPOSER);
tag_id3_import_text(ret, tag, "TPE3", TAG_ITEM_PERFORMER);
tag_id3_import_text(ret, tag, "TPE4", TAG_ITEM_PERFORMER);
tag_id3_import_comment(ret, tag, ID3_FRAME_COMMENT, TAG_ITEM_COMMENT);
tag_id3_import_text(ret, tag, ID3_FRAME_DISC, TAG_ITEM_DISC);
tag_id3_import_musicbrainz(ret, tag);
tag_id3_import_ufid(ret, tag);
......
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