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Viewing changes to src/plugin_common/canonical_tag.c

  • Committer: Bazaar Package Importer
  • Author(s): Matt Zimmerman
  • Date: 2004-04-16 15:14:31 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20040416151431-eyloggqxpwbwpogz
Tags: 1.1.0-11
Ensure that libFLAC is linked with -lm on all architectures, and
regardless of whether nasm is present

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src/plugin_common/canonical_tag.c
 
1
/* plugin_common - Routines common to several plugins
 
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 * Copyright (C) 2002,2003  Josh Coalson
 
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 *
 
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 * This program is free software; you can redistribute it and/or
 
5
 * modify it under the terms of the GNU General Public License
 
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 * as published by the Free Software Foundation; either version 2
 
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 * of the License, or (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
11
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
12
 * GNU General Public License for more details.
 
13
 *
 
14
 * You should have received a copy of the GNU General Public License
 
15
 * along with this program; if not, write to the Free Software
 
16
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
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 */
 
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#include <stdlib.h>
 
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#include <stdio.h>
 
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#include "canonical_tag.h"
 
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#include "id3v2.h"
 
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#include "vorbiscomment.h"
 
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#include "FLAC/assert.h"
 
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#include "FLAC/metadata.h"
 
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static void local__safe_free(void *object)
 
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{
 
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        if(0 != object)
 
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                free(object);
 
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}
 
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static void local__copy_field(char **dest, const char *src, unsigned n)
 
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{
 
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        if(n > 0) {
 
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                const char *p = src + n;
 
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                while(p > src && *(--p) == ' ')
 
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                        ;
 
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                n = p - src + 1;
 
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                if(0 != (*dest = malloc(n+1))) {
 
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                        memcpy(*dest, src, n);
 
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                        (*dest)[n] = '\0';
 
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                }
 
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        }
 
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        else
 
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                *dest = 0;
 
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}
 
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static FLAC__bool local__get_id3v1_tag_as_canonical(const char *filename, FLAC_Plugin__CanonicalTag *tag)
 
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{
 
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        FLAC_Plugin__Id3v1_Tag id3v1_tag;
 
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        if(FLAC_plugin__id3v1_tag_get(filename, &id3v1_tag)) {
 
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                FLAC_plugin__canonical_tag_convert_from_id3v1(tag, &id3v1_tag);
 
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                return true;
 
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        }
 
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        return false;
 
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}
 
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FLAC_Plugin__CanonicalTag *FLAC_plugin__canonical_tag_new()
 
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{
 
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        FLAC_Plugin__CanonicalTag *object = (FLAC_Plugin__CanonicalTag*)malloc(sizeof(FLAC_Plugin__CanonicalTag));
 
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        if(0 != object)
 
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                FLAC_plugin__canonical_tag_init(object);
 
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        return object;
 
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}
 
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void FLAC_plugin__canonical_tag_delete(FLAC_Plugin__CanonicalTag *object)
 
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{
 
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        FLAC__ASSERT(0 != object);
 
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        FLAC_plugin__canonical_tag_clear(object);
 
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        free(object);
 
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}
 
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void FLAC_plugin__canonical_tag_init(FLAC_Plugin__CanonicalTag *object)
 
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{
 
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        FLAC__ASSERT(0 != object);
 
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        object->title = 0;
 
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        object->composer = 0;
 
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        object->performer = 0;
 
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        object->album = 0;
 
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        object->year_recorded = 0;
 
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        object->year_performed = 0;
 
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        object->track_number = 0;
 
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        object->tracks_in_album = 0;
 
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        object->genre = 0;
 
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        object->comment = 0;
 
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}
 
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void FLAC_plugin__canonical_tag_clear(FLAC_Plugin__CanonicalTag *object)
 
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{
 
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        FLAC__ASSERT(0 != object);
 
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        local__safe_free(object->title);
 
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        local__safe_free(object->composer);
 
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        local__safe_free(object->performer);
 
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        local__safe_free(object->album);
 
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        local__safe_free(object->year_recorded);
 
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        local__safe_free(object->year_performed);
 
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        local__safe_free(object->track_number);
 
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        local__safe_free(object->tracks_in_album);
 
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        local__safe_free(object->genre);
 
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        local__safe_free(object->comment);
 
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        FLAC_plugin__canonical_tag_init(object);
 
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}
 
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static void local__grab(char **dest, char **src)
 
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{
 
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        if(0 == *dest) {
 
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                *dest = *src;
 
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                *src = 0;
 
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        }
 
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}
 
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void FLAC_plugin__canonical_tag_merge(FLAC_Plugin__CanonicalTag *dest, FLAC_Plugin__CanonicalTag *src)
 
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{
 
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        local__grab(&dest->title, &src->title);
 
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        local__grab(&dest->composer, &src->composer);
 
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        local__grab(&dest->performer, &src->performer);
 
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        local__grab(&dest->album, &src->album);
 
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        local__grab(&dest->year_recorded, &src->year_recorded);
 
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        local__grab(&dest->year_performed, &src->year_performed);
 
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        local__grab(&dest->track_number, &src->track_number);
 
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        local__grab(&dest->tracks_in_album, &src->tracks_in_album);
 
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        local__grab(&dest->genre, &src->genre);
 
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        local__grab(&dest->comment, &src->comment);
 
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}
 
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void FLAC_plugin__canonical_tag_convert_from_id3v1(FLAC_Plugin__CanonicalTag *object, const FLAC_Plugin__Id3v1_Tag *id3v1_tag)
 
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{
 
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        local__copy_field(&object->title, id3v1_tag->title, 30);
 
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        local__copy_field(&object->composer, id3v1_tag->artist, 30);
 
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        local__copy_field(&object->performer, id3v1_tag->artist, 30);
 
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        local__copy_field(&object->album, id3v1_tag->album, 30);
 
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        local__copy_field(&object->year_performed, id3v1_tag->year, 4);
 
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        /* Check for v1.1 tags. */
 
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        if (id3v1_tag->comment.v1_1.zero == 0) {
 
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                if(0 != (object->track_number = malloc(4)))
 
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                        sprintf(object->track_number, "%u", (unsigned)id3v1_tag->comment.v1_1.track);
 
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                local__copy_field(&object->comment, id3v1_tag->comment.v1_1.comment, 28);
 
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        }
 
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        else {
 
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                object->track_number = strdup("0");
 
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                local__copy_field(&object->comment, id3v1_tag->comment.v1_0.comment, 30);
 
146
        }
 
147
 
 
148
        object->genre = strdup(FLAC_plugin__id3v1_tag_get_genre_as_string(id3v1_tag->genre));
 
149
}
 
150
 
 
151
void FLAC_plugin__canonical_tag_get_combined(const char *filename, FLAC_Plugin__CanonicalTag *tag)
 
152
{
 
153
        FLAC_Plugin__CanonicalTag id3v1_tag, id3v2_tag;
 
154
 
 
155
        FLAC_plugin__vorbiscomment_get(filename, tag);
 
156
 
 
157
        FLAC_plugin__canonical_tag_init(&id3v2_tag);
 
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        (void)FLAC_plugin__id3v2_tag_get(filename, &id3v2_tag);
 
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160
        FLAC_plugin__canonical_tag_init(&id3v1_tag);
 
161
        (void)local__get_id3v1_tag_as_canonical(filename, &id3v1_tag);
 
162
 
 
163
        /* merge tags, preferring, in order: vorbis comments, id3v2, id3v1 */
 
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        FLAC_plugin__canonical_tag_merge(tag, &id3v2_tag);
 
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        FLAC_plugin__canonical_tag_merge(tag, &id3v1_tag);
 
166
 
 
167
        FLAC_plugin__canonical_tag_clear(&id3v1_tag);
 
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        FLAC_plugin__canonical_tag_clear(&id3v2_tag);
 
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}