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-rw-r--r--apps/metadata/mod.c62
1 files changed, 52 insertions, 10 deletions
diff --git a/apps/metadata/mod.c b/apps/metadata/mod.c
index dbedc6e62f..9595729c0b 100644
--- a/apps/metadata/mod.c
+++ b/apps/metadata/mod.c
@@ -19,40 +19,82 @@
*
****************************************************************************/
#include <stdio.h>
-#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>
#include "system.h"
#include "metadata.h"
+#include <string-extra.h>
#include "metadata_common.h"
#include "metadata_parsers.h"
#include "rbunicode.h"
+#define MODULEHEADERSIZE 0x438
+
bool get_mod_metadata(int fd, struct mp3entry* id3)
{
/* Use the trackname part of the id3 structure as a temporary buffer */
- unsigned char buf[1084];
- int read_bytes;
+ unsigned char buf[MODULEHEADERSIZE];
+ unsigned char id[4];
+ bool is_mod_file = false;
char *p;
-
if ((lseek(fd, 0, SEEK_SET) < 0)
- || ((read_bytes = read(fd, buf, sizeof(buf))) < 1084))
+ || (read(fd, buf, sizeof(buf)) < MODULEHEADERSIZE))
{
return false;
}
-
- /* We don't do file format checking here
- * There can be .mod files without any signatures out there */
+
+ if (read(fd, id, sizeof(id)) < (ssize_t)sizeof(id))
+ return false;
+
+ /* Mod type checking based on MikMod */
+ /* Protracker and variants */
+ if ((!memcmp(id, "M.K.", 4)) || (!memcmp(id, "M!K!", 4))) {
+ is_mod_file = true;
+ }
+
+ /* Star Tracker */
+ if (((!memcmp(id, "FLT", 3)) || (!memcmp(id, "EXO", 3))) &&
+ (isdigit(id[3]))) {
+ char numchn = id[3] - '0';
+ if (numchn == 4 || numchn == 8)
+ is_mod_file = true;
+ }
+
+ /* Oktalyzer (Amiga) */
+ if (!memcmp(id, "OKTA", 4)) {
+ is_mod_file = true;
+ }
+
+ /* Oktalyser (Atari) */
+ if (!memcmp(id, "CD81", 4)) {
+ is_mod_file = true;
+ }
+
+ /* Fasttracker */
+ if ((!memcmp(id + 1, "CHN", 3)) && (isdigit(id[0]))) {
+ is_mod_file = true;
+ }
+ /* Fasttracker or Taketracker */
+ if (((!memcmp(id + 2, "CH", 2)) || (!memcmp(id + 2, "CN", 2)))
+ && (isdigit(id[0])) && (isdigit(id[1]))) {
+ is_mod_file = true;
+ }
+
+ /* Don't try to play if we can't find a known mod type
+ * (there are mod files which have nothing to do with music) */
+ if (!is_mod_file)
+ return false;
p = id3->id3v2buf;
/* Copy Title */
- strcpy(p, &buf[0x00]);
+ if (strlcpy(p, buf, sizeof(id3->id3v2buf)) >= sizeof(id3->id3v2buf))
+ return false;
+
id3->title = p;
- p += strlen(p)+1;
id3->bitrate = filesize(fd)/1024; /* size in kb */
id3->frequency = 44100;