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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 Dave Chapman
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>
#include "system.h"
#include "metadata.h"
#include "metadata_common.h"
#include "metadata_parsers.h"
bool get_monkeys_metadata(int fd, struct mp3entry* id3)
{
/* Use the trackname part of the id3 structure as a temporary buffer */
unsigned char* buf = (unsigned char *)id3->path;
unsigned char* header;
bool rc = false;
uint32_t descriptorlength;
uint32_t totalsamples;
uint32_t blocksperframe, finalframeblocks, totalframes;
int fileversion;
lseek(fd, 0, SEEK_SET);
if (read(fd, buf, 4) < 4)
{
return rc;
}
if (memcmp(buf, "MAC ", 4) != 0)
{
return rc;
}
read(fd, buf + 4, MAX_PATH - 4);
fileversion = get_short_le(buf+4);
if (fileversion < 3970)
{
/* Not supported */
return false;
}
if (fileversion >= 3980)
{
descriptorlength = get_long_le(buf+8);
header = buf + descriptorlength;
blocksperframe = get_long_le(header+4);
finalframeblocks = get_long_le(header+8);
totalframes = get_long_le(header+12);
id3->frequency = get_long_le(header+20);
}
else
{
/* v3.95 and later files all have a fixed framesize */
blocksperframe = 73728 * 4;
finalframeblocks = get_long_le(buf+28);
totalframes = get_long_le(buf+24);
id3->frequency = get_long_le(buf+12);
}
id3->vbr = true; /* All APE files are VBR */
id3->filesize = filesize(fd);
totalsamples = finalframeblocks;
if (totalframes > 1)
totalsamples += blocksperframe * (totalframes-1);
id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
id3->bitrate = (id3->filesize * 8) / id3->length;
return true;
}
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