99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Dave Chapman
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <inttypes.h>
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#include "system.h"
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#include "id3.h"
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#include "metadata_common.h"
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bool get_aiff_metadata(int fd, struct mp3entry* id3)
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{
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/* Use the trackname part of the id3 structure as a temporary buffer */
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unsigned char* buf = (unsigned char *)id3->path;
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unsigned long numChannels = 0;
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unsigned long numSampleFrames = 0;
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unsigned long sampleSize = 0;
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unsigned long sampleRate = 0;
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unsigned long numbytes = 0;
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int read_bytes;
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int i;
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if ((lseek(fd, 0, SEEK_SET) < 0)
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|| ((read_bytes = read(fd, buf, sizeof(id3->path))) < 54))
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{
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return false;
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}
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if ((memcmp(buf, "FORM",4) != 0)
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|| (memcmp(&buf[8], "AIFF", 4) !=0 ))
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{
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return false;
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}
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buf += 12;
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read_bytes -= 12;
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while ((numbytes == 0) && (read_bytes >= 8))
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{
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/* chunkSize */
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i = get_long_be(&buf[4]);
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if (memcmp(buf, "COMM", 4) == 0)
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{
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/* numChannels */
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numChannels = ((buf[8]<<8)|buf[9]);
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/* numSampleFrames */
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numSampleFrames = get_long_be(&buf[10]);
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/* sampleSize */
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sampleSize = ((buf[14]<<8)|buf[15]);
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/* sampleRate */
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sampleRate = get_long_be(&buf[18]);
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sampleRate = sampleRate >> (16+14-buf[17]);
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/* save format infos */
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id3->bitrate = (sampleSize * numChannels * sampleRate) / 1000;
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id3->frequency = sampleRate;
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id3->length = ((int64_t) numSampleFrames * 1000) / id3->frequency;
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id3->vbr = false; /* AIFF files are CBR */
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id3->filesize = filesize(fd);
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}
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else if (memcmp(buf, "SSND", 4) == 0)
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{
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numbytes = i - 8;
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}
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if (i & 0x01)
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{
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i++; /* odd chunk sizes must be padded */
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}
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buf += i + 8;
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read_bytes -= i + 8;
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}
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if ((numbytes == 0) || (numChannels == 0))
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{
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return false;
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}
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return true;
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}
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