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getDataFromNomadJukeboxImage.c
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getDataFromNomadJukeboxImage.c
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/*
* I have an old Creative Nomad Jukebox MP3 player. It still works, but I
* can't easily change or retrieve the contents -- the software for this
* doesn't work with modern operating systems, and is hard to find. There is a
* program for linux and macOS that is supposed to interface with the device,
* but it's really slow and wasn't reliable for me.
*
* This is a quick and dirty program to read song data from a disk image from a
* Creative Nomad Jukebox MP3 player. To use it, follow these steps:
*
* 1. Compile the program.
* 3. Create a directory named jukebox-out.
* 3. Create a disk image by removing the hard disk, and attaching it to a
* computer. Use dd or your favorite disk imaging program to create an
* image of the disk.
* 4. Name your disk image jukebox.img.
* 5. Run the program.
* 6. Your songs have been placed in the jukebox-out directory.
*
* If you don't understand any of the directions above, this program is not for
* you. Questions about how to compile or run the program will be ignored.
* This program should compile and run on most UNIX and UNIX-like systems,
* including Linux and macOS. It can probably be compiled on Windows, with
* Visual Studio, but the use of cygwin or mingw would be easier.
*
* The program displays a lot of information as it reads the disk image, mainly
* for trouble-shooting purposes. If you've added and deleted songs frequently
* from the device, you'll probably notice more output than if you've only used
* it a little.
*
* Because the program makes no attempt to understand which songs may have been
* deleted, it might recover more than you expect, but be aware that some of
* that "more than you expect" is probably corrupted.
*
* YMMV! The program worked to let me recover songs from my MP3 player, but it
* might fail miserably for you.
*
* WARNING: Removing the hard disk from the MP3 player will void the MP3
* player's warranty!
*/
/*
* Copyright (c) 2018, Thomas J. Francis, Jr.
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syslimits.h>
#include <unistd.h>
int main(int argc, char **argv)
{
const char *imageFileName = "jukebox.img";
const char *outDirectory = "jukebox-out";
const int readSize = 0x5f54;
const int beginSize = 0x10;
unsigned int fileCount = 0;
unsigned char *buffer = (unsigned char *)calloc(readSize, 1);
char fileName[PATH_MAX*2+2];
printf("Saving songs to %s\n", outDirectory);
if (buffer == NULL)
{
return 1;
}
FILE *fp = fopen(imageFileName, "rb");
if (fp == NULL)
{
free(buffer);
return 1;
}
do
{
if (fread(buffer, 1, readSize, fp) < readSize)
{
printf("All done! Created %u files!\n", fileCount);
break;
}
unsigned char *codec = (unsigned char *)memmem(buffer, readSize, "CODEC\0\0\0", 8);
if (codec == NULL)
{
fseek(fp, -7, SEEK_CUR);
continue;
}
off_t pos = (codec - buffer) + ftello(fp) - readSize;
printf("Found header at: %llx...", pos);
fflush(stdout);
if (codec != (buffer + beginSize))
{
printf("Repositioning so header is at start of buffer\n");
fflush(stdout);
fseek(fp, pos - beginSize, SEEK_SET);
continue;
}
unsigned char *nextCodec = (unsigned char *)memmem(buffer+beginSize+8, readSize-beginSize-8, "CODEC\0\0\0", 8);
if (nextCodec != NULL)
{
printf("Ignoring invalid header (contains header)\n");
fflush(stdout);
fseek(fp, -(readSize - ((nextCodec - buffer) - beginSize)), SEEK_CUR);
continue;
}
unsigned char *type = codec + 8;
size_t bytesLeft = readSize - (type - buffer) - strlen((const char *)type);
unsigned char *title = (unsigned char *)memmem(type+strlen((const char *)type), bytesLeft, "TITLE\0\0\0", 8);
if (title == NULL)
{
printf("Ignoring invalid header (missing TITLE)\n");
fflush(stdout);
nextCodec = (unsigned char *)memmem(type+strlen((const char *)type), bytesLeft, "CODEC\0\0\0", 8);
if (nextCodec != NULL)
{
fseek(fp, -(readSize - ((nextCodec - buffer) - beginSize)), SEEK_CUR);
}
continue;
}
title += 8;
snprintf(fileName, sizeof(fileName), "%s/%s.mp3", outDirectory, title);
fileName[sizeof(fileName)-1] = '\0';
// Make sure we don't overwrite an existing file!
int counter = 2;
while (access(fileName, F_OK) == 0)
{
snprintf(fileName, sizeof(fileName), "%s/%s-%d.mp3", outDirectory, title, counter);
fileName[sizeof(fileName)-1] = '\0';
}
bytesLeft = readSize - (title - buffer) - strlen((const char *)title);
unsigned char *fileSizePtr = (unsigned char *)memmem(title+strlen((const char *)title), bytesLeft, "FILE SIZE\0\0\0", 12);
if (fileSizePtr == NULL)
{
printf("Ignoring invalid header (missing FILE SIZE)\n");
nextCodec = (unsigned char *)memmem(type+strlen((const char *)type), bytesLeft, "CODEC\0\0\0", 8);
if (nextCodec != NULL)
{
fseek(fp, -(readSize - ((nextCodec - buffer) - beginSize)), SEEK_CUR);
}
fflush(stdout);
continue;
}
fileSizePtr += 12;
unsigned int fileSize = fileSizePtr[0] & 0xFF;
fileSize += (fileSizePtr[1] & 0xFF) << 8;
fileSize += (fileSizePtr[2] & 0xFF) << 16;
fileSize += (fileSizePtr[3] & 0xFF) << 24;
unsigned char *fileBuffer = (unsigned char *)malloc(fileSize);
if (fileBuffer == NULL)
{
printf("Out of memory!\n");
free(buffer);
fclose(fp);
return 1;
}
size_t bytesRead = fread(fileBuffer, 1, fileSize, fp);
nextCodec = (unsigned char *)memmem(fileBuffer, fileSize, "\0\0CODEC\0\0\0", 12);
if (nextCodec != NULL)
{
printf("Ignoring invalid header (data contains header)\n");
fflush(stdout);
fseek(fp, -(fileSize - ((nextCodec - fileBuffer) - beginSize)), SEEK_CUR);
free(fileBuffer);
continue;
}
FILE *newFP = fopen(fileName, "wb");
size_t bytesWritten = fwrite(fileBuffer, 1, bytesRead, newFP);
free(fileBuffer);
printf("Saved '%s': %lu of %u\n", title, bytesWritten, fileSize);
fflush(stdout);
fclose(newFP);
fileCount++;
} while (1);
free(buffer);
fclose(fp);
return 0;
}