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Added a sample implementation of a reader in C
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== Sample reader ==
This is a basic example of how to read a 3DS playlist. I know that this works on my specific system; on any other system, it's liable to fail. I'm not responsible if hurt yourself.
<pre>/* This is free and unencumbered software released into the public domain.
/* Anyone is free to copy, modify, publish, use, compile, sell, or
/* distribute this software, either in source code form or as a compiled
/* binary, for any purpose, commercial or non-commercial, and by any
/* means.
/* In jurisdictions that recognize copyright laws, the author or authors
/* of this software dedicate any and all copyright interest in the
/* software to the public domain. We make this dedication for the benefit
/* of the public at large and to the detriment of our heirs and
/* successors. We intend this dedication to be an overt act of
/* relinquishment in perpetuity of all present and future rights to this
/* software under copyright law.
/*
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
/* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
/* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
/* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
/* OTHER DEALINGS IN THE SOFTWARE.
/*
/* For more information, please refer to <http://unlicense.org/> */
#include <stdio.h>
#include <stdint.h>
uint8_t buf[0x26730];
uint16_t checksum, icon, songCount;
uint32_t timestamp;
uint8_t playlistName[0x100];
uint8_t songName[0x20C][299];
void readUtf16AsAscii(uint8_t *input, uint8_t *output, uint16_t length, uint32_t offset) {
uint16_t j=0;
for (j=0; j<length; j++) {
output[j] = input[(j*2)+offset];
}
}
int main(int argc, char* argv[]) {
uint16_t t=0;
FILE *playlistFile;
if (argc != 2) {
printf("Usage: %s FILE\n", argv[0]);
exit(1);
}
if ((playlistFile = fopen(argv[1], "rb")) == NULL) {
printf("Could not open %s.\n", argv[1]);
exit(1);
}
if (fread(buf, 1, 0x26730, playlistFile) != 0x26730) {
printf("Could not 0x26730 bytes from %s.\n", argv[1]);
exit(1);
}
if (!((buf[0] = 'O') && (buf[1] = 'V') && (buf[2] = 'F') && (buf[3] = 'A'))) {
printf("%s is not a 3DS playlist file.\n", argv[1]);
exit(1);
}
checksum = (buf[0x11] << 8) | buf[0x10];
icon = (buf[0x13] << 8) | buf[0x12];
songCount = (buf[0x15] << 8) | buf[0x14];
timestamp = (buf[0x17] << 24) | (buf[0x16] << 16) | (buf[0x19] << 8) | buf[0x18];
readUtf16AsAscii(buf, playlistName, 0x100, 0x20);
for (t=0; t<songCount; t++) readUtf16AsAscii(buf, songName[t], 0x20C, (0x120+(t*0x20C)));
printf("Checksum:\t%04X\nIcon ID:\t%04X\nSong Count:\t%04X\nTimestamp:\t%08X\nPlaylist Name:\t\"%s\"\n",
checksum, icon, songCount, timestamp, playlistName);
for (t=0; t<songCount; t++) printf("Name of song %03i: %s\n", t, songName[t]);
}
</pre>
[[Category:File formats]]
[[Category:File formats]]
[[Category:Nintendo Software]]
[[Category:Nintendo Software]]