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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Dave Chapman
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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 "id3.h"
#include "metadata_common.h"
bool get_aiff_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 long numChannels = 0;
unsigned long numSampleFrames = 0;
unsigned long sampleSize = 0;
unsigned long sampleRate = 0;
unsigned long numbytes = 0;
int read_bytes;
int i;
if ((lseek(fd, 0, SEEK_SET) < 0)
|| ((read_bytes = read(fd, buf, sizeof(id3->path))) < 54))
{
return false;
}
if ((memcmp(buf, "FORM",4) != 0)
|| (memcmp(&buf[8], "AIFF", 4) !=0 ))
{
return false;
}
buf += 12;
read_bytes -= 12;
while ((numbytes == 0) && (read_bytes >= 8))
{
/* chunkSize */
i = get_long_be(&buf[4]);
if (memcmp(buf, "COMM", 4) == 0)
{
/* numChannels */
numChannels = ((buf[8]<<8)|buf[9]);
/* numSampleFrames */
numSampleFrames = get_long_be(&buf[10]);
/* sampleSize */
sampleSize = ((buf[14]<<8)|buf[15]);
/* sampleRate */
sampleRate = get_long_be(&buf[18]);
sampleRate = sampleRate >> (16+14-buf[17]);
/* save format infos */
id3->bitrate = (sampleSize * numChannels * sampleRate) / 1000;
id3->frequency = sampleRate;
id3->length = ((int64_t) numSampleFrames * 1000) / id3->frequency;
id3->vbr = false; /* AIFF files are CBR */
id3->filesize = filesize(fd);
}
else if (memcmp(buf, "SSND", 4) == 0)
{
numbytes = i - 8;
}
if (i & 0x01)
{
i++; /* odd chunk sizes must be padded */
}
buf += i + 8;
read_bytes -= i + 8;
}
if ((numbytes == 0) || (numChannels == 0))
{
return false;
}
return true;
}
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