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/* Creative Commons has made the contents of this file
* available under a CC-GNU-LGPL license:
*
* http://creativecommons.org/licenses/LGPL/2.1/
*
* A copy of the full license can be found as part of this
* distribution in the file COPYING.
*
* You may use the liblicense software in accordance with the
* terms of that license. You agree that you are solely
* responsible for your use of the liblicense software and you
* represent and warrant to Creative Commons that your use
* of the liblicense software will comply with the CC-GNU-LGPL.
*
* Copyright 2007, Creative Commons, www.creativecommons.org.
* Copyright 2007, Jason Kivlighn.
* Copyright (C) 2007 Peter Miller
*/
#include <stdio.h>
#include <string.h>
#include <liblicense.h>
#include <FLAC/metadata.h>
#include <FLAC/format.h>
void flac_init()
{
}
char* flac_read( const char* filename, const ll_uri_t predicate )
{
if (strcmp(predicate, LL_LICENSE) != 0) {
return -LL_E_MODULE_WRITE_FAIL; /* We only know License */
}
char *license = NULL;
FLAC__StreamMetadata *vc;
if ( FLAC__metadata_get_tags(filename,&vc) ) {
int idx = FLAC__metadata_object_vorbiscomment_find_entry_from(vc, 0, "LICENSE");
if (idx != -1) {
license = strdup((char*)&vc->data.vorbis_comment.comments[idx].entry[8]);
}
FLAC__metadata_object_delete(vc);
}
return license;
}
int flac_write( const char* filename, const char *predicate, const char* uri )
{
if (strcmp(predicate, LL_LICENSE) != 0) {
return -LL_E_MODULE_WRITE_FAIL; /* We only know License */
}
int ret = 1;
FLAC__Metadata_SimpleIterator *iter = FLAC__metadata_simple_iterator_new();
if (FLAC__metadata_simple_iterator_init(iter,filename,false,false) && FLAC__metadata_simple_iterator_is_writable(iter)) {
FLAC__bool found_vc = false;
do {
if (FLAC__metadata_simple_iterator_get_block_type(iter) == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
FLAC__StreamMetadata *vc;
found_vc = true;
vc = FLAC__metadata_simple_iterator_get_block(iter);
if (uri) {
FLAC__StreamMetadata_VorbisComment_Entry entry;
FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "LICENSE", uri);
FLAC__metadata_object_vorbiscomment_replace_comment(vc,entry,true,false);
} else {
int i = FLAC__metadata_object_vorbiscomment_find_entry_from(vc,0,"LICENSE");
if (i != -1) {
FLAC__metadata_object_vorbiscomment_delete_comment(vc,i);
}
}
ret = FLAC__metadata_simple_iterator_set_block(iter, vc, true);
FLAC__metadata_object_delete(vc);
break;
}
} while (FLAC__metadata_simple_iterator_next(iter));
if (!found_vc && uri) {
FLAC__StreamMetadata *vc = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__StreamMetadata_VorbisComment_Entry entry;
FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "LICENSE", uri);
FLAC__metadata_object_vorbiscomment_append_comment(vc,entry,false);
ret = FLAC__metadata_simple_iterator_insert_block_after(iter,vc,true);
FLAC__metadata_object_delete(vc);
}
} else {
ret = 0;
}
FLAC__metadata_simple_iterator_delete(iter);
return ret;
}
char * flac_supported_predicates[] = {LL_LICENSE, NULL};
char * flac_mime_types[] = {"audio/x-flac", NULL};
LL_MODULE_DEFINE("flac.so",
"Write licenses in a FLAC comment.",
"0.1",
LL_FEATURES_EMBED,
flac_supported_predicates,
flac_mime_types,
flac_init,flac_read,flac_write,
NULL /* no shutdown */);
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