51b45d5602
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18814 a1c6a512-1295-4272-9138-f99709370657
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/***************************************************************************
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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) 2007 Dave Chapman
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 "metadata.h"
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#include "metadata_common.h"
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#include "metadata_parsers.h"
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bool get_monkeys_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 char* header;
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bool rc = false;
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uint32_t descriptorlength;
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uint32_t totalsamples;
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uint32_t blocksperframe, finalframeblocks, totalframes;
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int fileversion;
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lseek(fd, 0, SEEK_SET);
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if (read(fd, buf, 4) < 4)
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{
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return rc;
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}
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if (memcmp(buf, "MAC ", 4) != 0)
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{
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return rc;
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}
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read(fd, buf + 4, MAX_PATH - 4);
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fileversion = get_short_le(buf+4);
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if (fileversion < 3970)
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{
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/* Not supported */
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return false;
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}
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if (fileversion >= 3980)
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{
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descriptorlength = get_long_le(buf+8);
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header = buf + descriptorlength;
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blocksperframe = get_long_le(header+4);
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finalframeblocks = get_long_le(header+8);
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totalframes = get_long_le(header+12);
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id3->frequency = get_long_le(header+20);
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}
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else
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{
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/* v3.95 and later files all have a fixed framesize */
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blocksperframe = 73728 * 4;
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finalframeblocks = get_long_le(buf+28);
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totalframes = get_long_le(buf+24);
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id3->frequency = get_long_le(buf+12);
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}
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id3->vbr = true; /* All APE files are VBR */
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id3->filesize = filesize(fd);
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totalsamples = finalframeblocks;
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if (totalframes > 1)
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totalsamples += blocksperframe * (totalframes-1);
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id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
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id3->bitrate = (id3->filesize * 8) / id3->length;
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return true;
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}
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