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/* plugin_common - Routines common to several plugins
* Copyright (C) 2002,2003 Josh Coalson
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "vorbiscomment.h"
#include "FLAC/metadata.h"
static int local__vcentry_matches(const char *field_name, const FLAC__StreamMetadata_VorbisComment_Entry *entry)
{
#if defined _MSC_VER || defined __MINGW32__
#define FLAC__STRNCASECMP strnicmp
#else
#define FLAC__STRNCASECMP strncasecmp
#endif
const FLAC__byte *eq = memchr(entry->entry, '=', entry->length);
const unsigned field_name_length = strlen(field_name);
return (0 != eq && (unsigned)(eq-entry->entry) == field_name_length && 0 == FLAC__STRNCASECMP(field_name, entry->entry, field_name_length));
}
static void local__vcentry_parse_value(const FLAC__StreamMetadata_VorbisComment_Entry *entry, char **dest)
{
const FLAC__byte *eq = memchr(entry->entry, '=', entry->length);
if(0 == eq)
return;
else {
const unsigned value_length = entry->length - (unsigned)((++eq) - entry->entry);
*dest = malloc(value_length + 1);
if(0 != *dest) {
memcpy(*dest, eq, value_length);
(*dest)[value_length] = '\0';
}
}
}
static void local__vc_change_field(FLAC__StreamMetadata *block, const char *name, const char *value)
{
int i, l;
char *s;
/* find last */
for (l = -1; (i = FLAC__metadata_object_vorbiscomment_find_entry_from(block, l + 1, name)) != -1; l = i)
;
if(!value || !strlen(value)) {
if (l != -1)
FLAC__metadata_object_vorbiscomment_delete_comment(block, l);
return;
}
s = malloc(strlen(name) + strlen(value) + 2);
if(s) {
FLAC__StreamMetadata_VorbisComment_Entry entry;
sprintf(s, "%s=%s", name, value);
entry.length = strlen(s);
entry.entry = s;
if(l == -1)
FLAC__metadata_object_vorbiscomment_insert_comment(block, block->data.vorbis_comment.num_comments, entry, /*copy=*/true);
else
FLAC__metadata_object_vorbiscomment_set_comment(block, l, entry, /*copy=*/true);
free(s);
}
}
void FLAC_plugin__vorbiscomment_get(const char *filename, FLAC_Plugin__CanonicalTag *tag)
{
FLAC__Metadata_SimpleIterator *iterator = FLAC__metadata_simple_iterator_new();
if(0 != iterator) {
if(FLAC__metadata_simple_iterator_init(iterator, filename, /*read_only=*/true, /*preserve_file_stats=*/true)) {
FLAC__bool got_vorbis_comments = false;
do {
if(FLAC__metadata_simple_iterator_get_block_type(iterator) == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
FLAC__StreamMetadata *block = FLAC__metadata_simple_iterator_get_block(iterator);
if(0 != block) {
unsigned i;
const FLAC__StreamMetadata_VorbisComment *vc = &block->data.vorbis_comment;
for(i = 0; i < vc->num_comments; i++) {
if(local__vcentry_matches("artist", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->composer);
else if(local__vcentry_matches("performer", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->performer);
else if(local__vcentry_matches("album", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->album);
else if(local__vcentry_matches("title", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->title);
else if(local__vcentry_matches("tracknumber", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->track_number);
else if(local__vcentry_matches("genre", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->genre);
else if(local__vcentry_matches("description", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->comment);
else if(local__vcentry_matches("date", &vc->comments[i]))
local__vcentry_parse_value(&vc->comments[i], &tag->year_recorded);
}
FLAC__metadata_object_delete(block);
got_vorbis_comments = true;
}
}
} while (!got_vorbis_comments && FLAC__metadata_simple_iterator_next(iterator));
}
FLAC__metadata_simple_iterator_delete(iterator);
}
}
FLAC__bool FLAC_plugin__vorbiscomment_set(const char *filename, FLAC_Plugin__CanonicalTag *tag)
{
FLAC__bool got_vorbis_comments = false;
FLAC__Metadata_SimpleIterator *iterator = FLAC__metadata_simple_iterator_new();
FLAC__StreamMetadata *block;
if(!iterator || !FLAC__metadata_simple_iterator_init(iterator, filename, /*read_only=*/false, /*preserve_file_stats=*/true))
return false;
do {
if(FLAC__metadata_simple_iterator_get_block_type(iterator) == FLAC__METADATA_TYPE_VORBIS_COMMENT)
got_vorbis_comments = true;
} while (!got_vorbis_comments && FLAC__metadata_simple_iterator_next(iterator));
if(!got_vorbis_comments) {
/* create a new block */
block = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
if(!block) {
FLAC__metadata_simple_iterator_delete(iterator);
return false;
}
}
else
block = FLAC__metadata_simple_iterator_get_block(iterator);
local__vc_change_field(block, "ARTIST", tag->composer);
local__vc_change_field(block, "PERFORMER", tag->performer);
local__vc_change_field(block, "ALBUM", tag->album);
local__vc_change_field(block, "TITLE", tag->title);
local__vc_change_field(block, "TRACKNUMBER", tag->track_number);
local__vc_change_field(block, "GENRE", tag->genre);
local__vc_change_field(block, "DESCRIPTION", tag->comment);
local__vc_change_field(block, "DATE", tag->year_recorded);
if(!got_vorbis_comments) {
if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, block, /*use_padding=*/true)) {
FLAC__metadata_object_delete(block);
FLAC__metadata_simple_iterator_delete(iterator);
return false;
}
}
else {
if(!FLAC__metadata_simple_iterator_set_block(iterator, block, /*use_padding=*/true)) {
FLAC__metadata_object_delete(block);
FLAC__metadata_simple_iterator_delete(iterator);
return false;
}
}
FLAC__metadata_object_delete(block);
FLAC__metadata_simple_iterator_delete(iterator);
return true;
}
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