66ebc35c55
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24992 a1c6a512-1295-4272-9138-f99709370657
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2005 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"
|
|
|
|
/* compressionType: AIFC QuickTime IMA ADPCM */
|
|
#define AIFC_FORMAT_QT_IMA_ADPCM "ima4"
|
|
|
|
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 numbytes = 0;
|
|
int read_bytes;
|
|
int i;
|
|
bool is_aifc = false;
|
|
|
|
if ((lseek(fd, 0, SEEK_SET) < 0) ||
|
|
((read_bytes = read(fd, buf, sizeof(id3->path))) < 54) ||
|
|
(memcmp(buf, "FORM", 4) != 0) || (memcmp(buf + 8, "AIF", 3) != 0) ||
|
|
(!(is_aifc = (buf[11] == 'C')) && buf[11] != 'F'))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
i = 12;
|
|
while ((numbytes == 0) && (read_bytes >= 8))
|
|
{
|
|
buf += i;
|
|
read_bytes -= i;
|
|
|
|
/* 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]);
|
|
/* sampleRate */
|
|
id3->frequency = get_long_be(&buf[18]);
|
|
id3->frequency >>= (16+14-buf[17]);
|
|
/* save format infos */
|
|
id3->bitrate = (((buf[14]<<8)|buf[15]) * numChannels * id3->frequency) / 1000;
|
|
if (!is_aifc || memcmp(&buf[26], AIFC_FORMAT_QT_IMA_ADPCM, 4) != 0)
|
|
id3->length = ((int64_t) numSampleFrames * 1000) / id3->frequency;
|
|
else
|
|
{
|
|
/* QuickTime IMA ADPCM is 1block = 64 data for each channel */
|
|
id3->length = ((int64_t) numSampleFrames * 64000LL) / id3->frequency;
|
|
}
|
|
|
|
id3->vbr = false; /* AIFF files are CBR */
|
|
id3->filesize = filesize(fd);
|
|
}
|
|
else if (memcmp(buf, "SSND", 4) == 0)
|
|
{
|
|
numbytes = i - 8;
|
|
}
|
|
|
|
/* odd chunk sizes must be padded */
|
|
i += 8 + (i & 0x01);
|
|
}
|
|
|
|
return ((numbytes != 0) && (numChannels != 0));
|
|
}
|