#include "error.h"
#include "afh.h"
#include "string.h"
+#include "fd.h"
/*
* MIN_CONSEC_GOOD_FRAMES defines how many consecutive valid MP3 frames we need
return ret;
}
+/* These helpers are not mentioned in the libid3tag header file. */
+void id3_field_init(union id3_field *field, enum id3_field_type type);
+void id3_field_finish(union id3_field *field);
+
+/*
+ * Frames of type ID3_FRAME_COMMENT contain three fields of type language,
+ * string, and fullstring. The third field contains the actual comment.
+ */
+static int set_comment_fields(struct id3_frame *fr, id3_ucs4_t *ucs4_val)
+{
+ int ret;
+ union id3_field *field;
+
+ field = id3_frame_field(fr, 1);
+ id3_field_init(field, ID3_FIELD_TYPE_LANGUAGE);
+
+ field = id3_frame_field(fr, 2);
+ id3_field_init(field, ID3_FIELD_TYPE_STRING);
+
+ field = id3_frame_field(fr, 3);
+ id3_field_init(field, ID3_FIELD_TYPE_STRINGFULL);
+ ret = id3_field_setfullstring(field, ucs4_val);
+ if (ret < 0)
+ return -E_ID3_SETSTRING;
+ return 1;
+}
+
+/*
+ * UCS-4 stands for Universal Character Set where each character uses exactly
+ * 32 bits. It is also known as UTF-32, see ISO 10646.
+ *
+ * We have to use UCS-4 as an intermediate representation because the functions
+ * of libid3tag which set the tag content expect an array of UCS-4 characters.
+ * Fortunately, libid3tag contains conversion functions from and to UTF-8.
+ */
+static int replace_tag(char const *id, const char *val, struct id3_tag *id3_t,
+ int options)
+{
+ int ret;
+ struct id3_frame *fr;
+ union id3_field *field;
+ id3_ucs4_t *ucs4_val;
+
+ /* First, detach all frames that match the given id. */
+ while ((fr = id3_tag_findframe(id3_t, id, 0))) {
+ PARA_INFO_LOG("deleting %s frame\n", id);
+ ret = id3_tag_detachframe(id3_t, fr);
+ if (ret < 0)
+ return -E_ID3_DETACH;
+ id3_frame_delete(fr);
+ }
+ if (!val || !*val)
+ return 0;
+ fr = id3_frame_new(id);
+ PARA_DEBUG_LOG("frame desc: %s, %d fields\n", fr->description, fr->nfields);
+
+ /* Frame 0 contains the encoding. We always use UTF-8. */
+ field = id3_frame_field(fr, 0);
+ id3_field_init(field, ID3_FIELD_TYPE_TEXTENCODING);
+ ret = id3_field_settextencoding(field, ID3_FIELD_TEXTENCODING_UTF_8);
+ if (ret < 0)
+ return -E_ID3_SETENCODING;
+ /* create UCS-4 representation */
+ ucs4_val = id3_utf8_ucs4duplicate((const id3_utf8_t *)val);
+
+ if (strcmp(id, ID3_FRAME_COMMENT) == 0)
+ ret = set_comment_fields(fr, ucs4_val);
+ else {
+ /* Non-comment frames contain the value in field 1. */
+ field = id3_frame_field(fr, 1);
+ if (options & ID3_TAG_OPTION_ID3V1) {
+ id3_ucs4_t *ptr[] = {ucs4_val, NULL};
+ id3_field_init(field, ID3_FIELD_TYPE_STRINGLIST);
+ ret = id3_field_setstrings(field, 1, ptr);
+ } else {
+ id3_field_init(field, ID3_FIELD_TYPE_STRINGFULL);
+ ret = id3_field_setfullstring(field, ucs4_val);
+ }
+ }
+ free(ucs4_val);
+ if (ret < 0)
+ return -E_ID3_SETSTRING;
+
+ PARA_INFO_LOG("attaching %s frame, value: %s\n", id, val);
+ ret = id3_tag_attachframe(id3_t, fr);
+ if (ret < 0)
+ return -E_ID3_ATTACH;
+ return 1;
+}
+
+static int replace_tags(struct id3_tag *id3_t, struct taginfo *tags)
+{
+ int ret, options = id3_tag_options(id3_t, 0, 0);
+
+ ret = replace_tag(ID3_FRAME_ARTIST, tags->artist, id3_t, options);
+ if (ret < 0)
+ return ret;
+ ret = replace_tag(ID3_FRAME_TITLE, tags->title, id3_t, options);
+ if (ret < 0)
+ return ret;
+ ret = replace_tag(ID3_FRAME_ALBUM, tags->album, id3_t, options);
+ if (ret < 0)
+ return ret;
+ ret = replace_tag(ID3_FRAME_YEAR, tags->year, id3_t, options);
+ if (ret < 0)
+ return ret;
+ ret = replace_tag(ID3_FRAME_COMMENT, tags->comment, id3_t, options);
+ if (ret < 0)
+ return ret;
+ return 1;
+}
+
+/* id3_tag_delete() does not seem to work due to refcount issues. */
+static void free_tag(struct id3_tag *id3_t)
+{
+ int i, j;
+ for (i = 0; i < id3_t->nframes; i++) {
+ struct id3_frame *fr = id3_t->frames[i];
+ for (j = 0; j < fr->nfields; j++) {
+ union id3_field *field = &fr->fields[j];
+ id3_field_finish(field);
+ }
+ free(fr);
+ }
+ free(id3_t->frames);
+ free(id3_t);
+}
+
+static int mp3_rewrite_tags(const char *map, size_t mapsize,
+ struct taginfo *tags, int fd, __a_unused const char *filename)
+{
+ int ret;
+ id3_length_t old_v2size, new_v2size;
+ id3_byte_t v1_buffer[128], *v2_buffer;
+ size_t data_sz;
+ struct id3_tag *v1_tag = NULL, *v2_tag = NULL;
+
+ if (mapsize >= 128) {
+ v1_tag = id3_tag_parse((const id3_byte_t *)map + mapsize - 128,
+ 128);
+ if (v1_tag) {
+ PARA_NOTICE_LOG("replacing id3v1 tag\n");
+ ret = replace_tags(v1_tag, tags);
+ if (ret < 0)
+ goto out;
+ id3_tag_render(v1_tag, v1_buffer);
+ }
+ }
+ old_v2size = 0;
+ v2_tag = id3_tag_parse((const id3_byte_t *)map, mapsize);
+ if (v2_tag) {
+ PARA_NOTICE_LOG("replacing id3v2 tag\n");
+ old_v2size = v2_tag->paddedsize;
+ } else if (!v1_tag) {
+ PARA_NOTICE_LOG("no id3 tags found, adding id3v2 tag\n");
+ v2_tag = id3_tag_new();
+ assert(v2_tag);
+ }
+ if (v2_tag) {
+ /*
+ * Turn off all options to avoid creating an extended header.
+ * id321 does not understand it.
+ */
+ id3_tag_options(v2_tag, ~0U, 0);
+ ret = replace_tags(v2_tag, tags);
+ if (ret < 0)
+ goto out;
+ new_v2size = id3_tag_render(v2_tag, NULL);
+ v2_buffer = para_malloc(new_v2size);
+ id3_tag_render(v2_tag, v2_buffer);
+ PARA_INFO_LOG("writing v2 tag (%lu bytes)\n", new_v2size);
+ ret = write_all(fd, (char *)v2_buffer, new_v2size);
+ free(v2_buffer);
+ if (ret < 0)
+ goto out;
+ }
+ data_sz = mapsize - old_v2size;
+ if (v1_tag && data_sz >= 128)
+ data_sz -= 128;
+ PARA_INFO_LOG("writing data part (%zu bytes)\n", data_sz);
+ ret = write_all(fd, map + old_v2size, data_sz);
+ if (ret < 0)
+ goto out;
+ if (v1_tag) {
+ PARA_INFO_LOG("writing v1 tag\n");
+ ret = write_all(fd, (char *)v1_buffer, 128);
+ }
+out:
+ if (v1_tag)
+ free_tag(v1_tag);
+ if (v2_tag)
+ free_tag(v2_tag);
+ return ret;
+}
+
#else /* HAVE_ID3TAG */
/*
{
afh->get_file_info = mp3_get_file_info;
afh->suffixes = mp3_suffixes;
+#ifdef HAVE_LIBID3TAG
+ afh->rewrite_tags = mp3_rewrite_tags;
+#endif /* HAVE_LIBID3TAG */
}
projects / paraslash.git / commitdiff