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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 Dominik Wenger
*
* 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"
#include "rbunicode.h"
#include "debug.h"
#define MAX_SONGS 32
static bool parse_dec(int *retval, const char *p, int minval, int maxval)
{
int r = 0;
do {
char c = *p;
if (c >= '0' && c <= '9')
r = 10 * r + c - '0';
else
return false;
if (r > maxval)
return false;
} while (*++p != '\0');
if (r < minval)
return false;
*retval = r;
return true;
}
static bool parse_text(char *retval, const char *p)
{
int i;
if (*p != '"')
return false;
p++;
if (p[0] == '<' && p[1] == '?' && p[2] == '>' && p[3] == '"')
return true;
i = 0;
while (*p != '"') {
if (i >= 127)
return false;
if (*p == '\0')
return false;
retval[i++] = *p++;
}
retval[i] = '\0';
return true;
}
static int ASAP_ParseDuration(const char *s)
{
int r;
if (*s < '0' || *s > '9')
return -1;
r = *s++ - '0';
if (*s >= '0' && *s <= '9')
r = 10 * r + *s++ - '0';
if (*s == ':') {
s++;
if (*s < '0' || *s > '5')
return -1;
r = 60 * r + (*s++ - '0') * 10;
if (*s < '0' || *s > '9')
return -1;
r += *s++ - '0';
}
r *= 1000;
if (*s != '.')
return r;
s++;
if (*s < '0' || *s > '9')
return r;
r += 100 * (*s++ - '0');
if (*s < '0' || *s > '9')
return r;
r += 10 * (*s++ - '0');
if (*s < '0' || *s > '9')
return r;
r += *s - '0';
return r;
}
static bool read_asap_string(char* source, char** buf, char** buffer_end, char** dest)
{
if(parse_text(*buf,source) == false)
return false;
/* set dest pointer */
*dest = *buf;
/* move buf ptr */
*buf += strlen(*buf)+1;
/* check size */
if(*buf >= *buffer_end)
{
DEBUGF("Buffer full\n");
return false;
}
return true;
}
static bool parse_sap_header(int fd, struct mp3entry* id3, int file_len)
{
int module_index = 0;
int sap_signature = -1;
int duration_index = 0;
unsigned char cur_char = 0;
int i;
/* set defaults */
int numSongs = 1;
int defSong = 0;
int durations[MAX_SONGS];
for (i = 0; i < MAX_SONGS; i++)
durations[i] = -1;
/* use id3v2 buffer for our strings */
char* buffer = id3->id3v2buf;
char* buffer_end = id3->id3v2buf + ID3V2_BUF_SIZE;
/* parse file */
while (1)
{
char line[256];
char *p;
if (module_index + 8 >= file_len)
return false;
/* read a char */
read(fd,&cur_char,1);
/* end of header */
if (cur_char == 0xff)
break;
i = 0;
while (cur_char != 0x0d)
{
line[i++] = cur_char;
module_index++;
if (module_index >= file_len || (unsigned)i >= sizeof(line) - 1)
return false;
/* read a char */
read(fd,&cur_char,1);
}
if (++module_index >= file_len )
return false;
/* read a char */
read(fd,&cur_char,1);
if ( cur_char != 0x0a)
return false;
line[i] = '\0';
for (p = line; *p != '\0'; p++) {
if (*p == ' ') {
*p++ = '\0';
break;
}
}
/* parse tags */
if(strcmp(line, "SAP") == 0)
sap_signature = 1;
if (sap_signature == -1)
return false;
if (strcmp(line, "AUTHOR") == 0)
{
if(read_asap_string(p, &buffer, &buffer_end, &id3->artist) == false)
return false;
}
else if(strcmp(line, "NAME") == 0)
{
if(read_asap_string(p, &buffer, &buffer_end, &id3->title) == false)
return false;
}
else if(strcmp(line, "DATE") == 0)
{
if(read_asap_string(p, &buffer, &buffer_end, &id3->year_string) == false)
return false;
}
else if (strcmp(line, "SONGS") == 0)
{
if (parse_dec(&numSongs, p, 1, MAX_SONGS) == false )
return false;
}
else if (strcmp(line, "DEFSONG") == 0)
{
if (parse_dec(&defSong, p, 0, MAX_SONGS) == false)
return false;
}
else if (strcmp(line, "TIME") == 0)
{
int durationTemp = ASAP_ParseDuration(p);
if (durationTemp < 0 || duration_index >= MAX_SONGS)
return false;
durations[duration_index++] = durationTemp;
}
}
/* set length: */
int length = durations[defSong];
if (length < 0)
length = 180 * 1000;
id3->length = length;
lseek(fd, 0, SEEK_SET);
return true;
}
bool get_asap_metadata(int fd, struct mp3entry* id3)
{
int filelength = filesize(fd);
if(parse_sap_header(fd, id3, filelength) == false)
{
DEBUGF("parse sap header failed.\n");
return false;
}
id3->bitrate = 706;
id3->frequency = 44100;
id3->vbr = false;
id3->filesize = filelength;
id3->genre_string = id3_get_num_genre(36);
return true;
}
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