0aee49bdf8
This updates the copyright header to all be the same, which is pretty much an update of where to mail request for a copy of the GPL and the years of the MPD project. This also puts all committers under 'The Music Player Project' umbrella. These entries should go individually in the AUTHORS file, for consistancy.
147 lines
3.0 KiB
C
147 lines
3.0 KiB
C
/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "tag_ape.h"
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#include "tag.h"
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#include <glib.h>
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#include <stdio.h>
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struct tag *
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tag_ape_load(const char *file)
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{
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struct tag *ret = NULL;
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FILE *fp;
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int tagCount;
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char *buffer = NULL;
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char *p;
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size_t tagLen;
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size_t size;
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unsigned long flags;
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int i;
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char *key;
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struct {
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unsigned char id[8];
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uint32_t version;
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uint32_t length;
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uint32_t tagCount;
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unsigned char flags[4];
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unsigned char reserved[8];
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} footer;
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const char *apeItems[7] = {
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"title",
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"artist",
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"album",
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"comment",
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"genre",
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"track",
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"year"
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};
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int tagItems[7] = {
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TAG_ITEM_TITLE,
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TAG_ITEM_ARTIST,
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TAG_ITEM_ALBUM,
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TAG_ITEM_COMMENT,
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TAG_ITEM_GENRE,
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TAG_ITEM_TRACK,
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TAG_ITEM_DATE,
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};
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fp = fopen(file, "r");
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if (!fp)
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return NULL;
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/* determine if file has an apeV2 tag */
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if (fseek(fp, 0, SEEK_END))
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goto fail;
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size = (size_t)ftell(fp);
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if (fseek(fp, size - sizeof(footer), SEEK_SET))
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goto fail;
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if (fread(&footer, 1, sizeof(footer), fp) != sizeof(footer))
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goto fail;
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if (memcmp(footer.id, "APETAGEX", sizeof(footer.id)) != 0)
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goto fail;
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if (GUINT32_FROM_LE(footer.version) != 2000)
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goto fail;
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/* find beginning of ape tag */
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tagLen = GUINT32_FROM_LE(footer.length);
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if (tagLen < sizeof(footer))
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goto fail;
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if (fseek(fp, size - tagLen, SEEK_SET))
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goto fail;
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/* read tag into buffer */
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tagLen -= sizeof(footer);
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if (tagLen <= 0)
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goto fail;
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buffer = g_malloc(tagLen);
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if (fread(buffer, 1, tagLen, fp) != tagLen)
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goto fail;
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/* read tags */
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tagCount = GUINT32_FROM_LE(footer.tagCount);
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p = buffer;
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while (tagCount-- && tagLen > 10) {
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size = GUINT32_FROM_LE(*(const uint32_t *)p);
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p += 4;
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tagLen -= 4;
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flags = GUINT32_FROM_LE(*(const uint32_t *)p);
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p += 4;
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tagLen -= 4;
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/* get the key */
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key = p;
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while (tagLen - size > 0 && *p != '\0') {
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p++;
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tagLen--;
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}
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p++;
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tagLen--;
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/* get the value */
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if (tagLen < size)
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goto fail;
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/* we only care about utf-8 text tags */
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if (!(flags & (0x3 << 1))) {
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for (i = 0; i < 7; i++) {
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if (strcasecmp(key, apeItems[i]) == 0) {
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if (!ret)
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ret = tag_new();
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tag_add_item_n(ret, tagItems[i],
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p, size);
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}
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}
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}
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p += size;
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tagLen -= size;
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}
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fail:
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if (fp)
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fclose(fp);
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g_free(buffer);
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return ret;
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}
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