124 lines
4.5 KiB
C
124 lines
4.5 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) 2010 Yoshihisa Uchida
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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 "platform.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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#include "logf.h"
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#define TTA1_SIGN 0x31415454
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#define TTA_HEADER_ID 0
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#define TTA_HEADER_AUDIO_FORMAT (TTA_HEADER_ID + sizeof(unsigned int))
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#define TTA_HEADER_NUM_CHANNELS (TTA_HEADER_AUDIO_FORMAT + sizeof(unsigned short))
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#define TTA_HEADER_BITS_PER_SAMPLE (TTA_HEADER_NUM_CHANNELS + sizeof(unsigned short))
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#define TTA_HEADER_SAMPLE_RATE (TTA_HEADER_BITS_PER_SAMPLE + sizeof(unsigned short))
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#define TTA_HEADER_DATA_LENGTH (TTA_HEADER_SAMPLE_RATE + sizeof(unsigned int))
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#define TTA_HEADER_CRC32 (TTA_HEADER_DATA_LENGTH + sizeof(unsigned int))
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#define TTA_HEADER_SIZE (TTA_HEADER_CRC32 + sizeof(unsigned int))
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#define TTA_HEADER_GETTER_ID(x) get_long_le(x)
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#define TTA_HEADER_GETTER_AUDIO_FORMAT(x) get_short_le(x)
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#define TTA_HEADER_GETTER_NUM_CHANNELS(x) get_short_le(x)
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#define TTA_HEADER_GETTER_BITS_PER_SAMPLE(x) get_short_le(x)
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#define TTA_HEADER_GETTER_SAMPLE_RATE(x) get_long_le(x)
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#define TTA_HEADER_GETTER_DATA_LENGTH(x) get_long_le(x)
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#define TTA_HEADER_GETTER_CRC32(x) get_long_le(x)
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#define GET_HEADER(x, tag) TTA_HEADER_GETTER_ ## tag((x) + TTA_HEADER_ ## tag)
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static void read_id3_tags(int fd, struct mp3entry* id3)
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{
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id3->title = NULL;
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id3->filesize = filesize(fd);
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id3->id3v2len = getid3v2len(fd);
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id3->tracknum = 0;
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id3->discnum = 0;
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id3->vbr = false; /* All TTA files are CBR */
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/* first get id3v2 tags. if no id3v2 tags ware found, get id3v1 tags */
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if (id3->id3v2len)
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{
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setid3v2title(fd, id3);
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id3->first_frame_offset = id3->id3v2len;
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return;
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}
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setid3v1title(fd, id3);
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}
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bool get_tta_metadata(int fd, struct mp3entry* id3)
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{
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unsigned char ttahdr[TTA_HEADER_SIZE];
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unsigned int datasize;
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unsigned int origsize;
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int bps;
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lseek(fd, 0, SEEK_SET);
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/* read id3 tags */
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read_id3_tags(fd, id3);
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lseek(fd, id3->id3v2len, SEEK_SET);
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/* read TTA header */
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if (read(fd, ttahdr, TTA_HEADER_SIZE) < 0)
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return false;
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/* check for TTA3 signature */
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if ((GET_HEADER(ttahdr, ID)) != TTA1_SIGN)
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return false;
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/* skip check CRC */
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id3->channels = (GET_HEADER(ttahdr, NUM_CHANNELS));
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id3->frequency = (GET_HEADER(ttahdr, SAMPLE_RATE));
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id3->length = ((GET_HEADER(ttahdr, DATA_LENGTH)) / id3->frequency) * 1000LL;
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bps = (GET_HEADER(ttahdr, BITS_PER_SAMPLE));
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datasize = id3->filesize - id3->first_frame_offset;
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origsize = (GET_HEADER(ttahdr, DATA_LENGTH)) * ((bps + 7) / 8) * id3->channels;
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id3->bitrate = (int) ((uint64_t) datasize * id3->frequency * id3->channels * bps
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/ (origsize * 1000LL));
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/* output header info (for debug) */
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DEBUGF("TTA header info ----\n");
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DEBUGF("id: %x\n", (unsigned int)(GET_HEADER(ttahdr, ID)));
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DEBUGF("channels: %d\n", id3->channels);
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DEBUGF("frequency: %ld\n", id3->frequency);
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DEBUGF("length: %ld\n", id3->length);
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DEBUGF("bitrate: %d\n", id3->bitrate);
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DEBUGF("bits per sample: %d\n", bps);
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DEBUGF("compressed size: %d\n", datasize);
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DEBUGF("original size: %d\n", origsize);
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DEBUGF("id3----\n");
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DEBUGF("artist: %s\n", id3->artist);
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DEBUGF("title: %s\n", id3->title);
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DEBUGF("genre: %s\n", id3->genre_string);
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return true;
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}
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