diff options
Diffstat (limited to 'apps/codecs/mod.c')
| -rw-r--r-- | apps/codecs/mod.c | 42 |
1 files changed, 15 insertions, 27 deletions
diff --git a/apps/codecs/mod.c b/apps/codecs/mod.c index 0d3eadf773..7bc87c8a42 100644 --- a/apps/codecs/mod.c +++ b/apps/codecs/mod.c @@ -374,7 +374,7 @@ STATICIRAM bool loadmod(void *modfile) ICODE_ATTR; bool loadmod(void *modfile) { int i; - bool periodsconverted = false; + unsigned char *periodsconverted; /* We don't support PowerPacker 2.0 Files */ if (memcmp((char*) modfile, "PP20", 4) == 0) return false; @@ -401,26 +401,10 @@ bool loadmod(void *modfile) {modsong.noofchannels = 8; modsong.noofinstruments = 31;} else if (memcmp(fileformattag, "CD81", 4) == 0) {modsong.noofchannels = 8; modsong.noofinstruments = 31;} - else if (memcmp(fileformattag, "RS", 2) == 0) - { - /* This is a special internal in-memory fileformat - * where the periods have been already converted to offsets - * in our periodtable. - * It comes to use when rockbox reloads an already played - * module (e.g. on rewinding) */ - modsong.noofchannels = fileformattag[2]; - modsong.noofinstruments = fileformattag[3]; - periodsconverted = true; - } else { - /* The file has no format tag, so we take a guess */ + /* The file has no format tag, so most likely soundtracker */ modsong.noofchannels = 4; - - /* For the no of instruments we check if there is a sample #16 and - * if it has a (ascii) name */ - char *p = (char *)modfile + 470; - if ((*p >= 32) && (*p <= 126)) modsong.noofinstruments = 31; - else modsong.noofinstruments = 15; + modsong.noofinstruments = 15; } /* Get the Song title @@ -458,14 +442,19 @@ bool loadmod(void *modfile) maxpatterns = modsong.patternordertable[i]; maxpatterns++; - /* Get the pattern data */ - modsong.patterndata = (char*)modfile + 20 + - modsong.noofinstruments*30 + 134; + /* use 'restartposition' (historically set to 127) which is not used here + as a marker that periods have already been converted */ + + periodsconverted = (char*)modfile + 20 + modsong.noofinstruments*30 + 1; + /* Get the pattern data; ST doesn't have fileformattag, so 4 bytes less */ + modsong.patterndata = periodsconverted + + (modsong.noofinstruments==15 ? 129 : 133); + /* Convert the period values in the mod file to offsets * in our periodtable (but only, if we haven't done this yet) */ p = (unsigned char *) modsong.patterndata; - if (!periodsconverted) + if (*periodsconverted != 0xfe) { int note, note2, channel; for (note=0;note<maxpatterns*64;note++) @@ -487,10 +476,9 @@ bool loadmod(void *modfile) p += 4; } /* Remember that we already converted the periods, - * in case the file gets reloaded by rewinding */ - fileformattag[0] = 'R'; fileformattag[1] = 'S'; - fileformattag[2] = modsong.noofchannels; - fileformattag[3] = modsong.noofinstruments; + * in case the file gets reloaded by rewinding + * with 0xfe (arbitary magic value > 127) */ + *periodsconverted = 0xfe; } /* Get the samples |