ref: 64483f35745627ddb2e7d678a10a052aef38895e
dir: /midi-debug/
diff -r 02682c97b28d sys/src/games/midi.c --- a/sys/src/games/midi.c Fri Sep 29 21:19:12 2017 +0200 +++ b/sys/src/games/midi.c Sat Sep 30 14:21:21 2017 +0200 @@ -13,11 +13,13 @@ typedef struct Tracker Tracker; -int fd, ofd, div, tempo = 500000, ntrack; +int fd, ofd, div, tempo = 500000, ntrack, debug; uvlong T; int freq[128]; uchar out[8192], *outp = out; +#define dprint if(debug)fprint + void * emallocz(int size) { @@ -149,9 +151,10 @@ readevent(Tracker *src) { uvlong l; - int n,t; + int c,t,n,v; - l = tconv(getvar(src)); + c = getvar(src); + l = tconv(c); run(src->t += l); t = get8(src); if((t & 0x80) == 0){ @@ -164,35 +167,46 @@ switch(t >> 4){ case 0x8: n = get8(src); - get8(src); + v = get8(src); + dprint(2, "t%zd %d c%d off %d %d\n", src-tr, c, t&15, n, v); src->notes[t & 15][n] = 0; break; case 0x9: n = get8(src); - src->notes[t & 15][n] = get8(src); + v = get8(src); + dprint(2, "t%zd %d c%d on %d %d\n", src-tr, c, t&15, n, v); + src->notes[t & 15][n] = v; break; case 0xB: - get16(src); + n = get8(src); + v = get8(src); + dprint(2, "t%zd %d c%d ctl %d %d\n", src-tr, c, t&15, n, v); break; case 0xC: - get8(src); + n = get8(src); + dprint(2, "t%zd %d c%d bank %d\n", src-tr, c, t&15, n); break; case 0xE: - get16(src); + n = get8(src); + n = get8(src) << 7 | n & 0x7f; + dprint(2, "t%zd %d c%d bend %d\n", src-tr, c, t&15, n); break; case 0xF: t = get8(src); n = get8(src); switch(t){ case 0x2F: + dprint(2, "t%zd %d eot\n", src-tr, c); src->ended = 1; break; case 0x51: tempo = get16(src) << 8; tempo |= get8(src); + dprint(2, "t%zd %d tempo %d\n", src-tr, c, tempo); break; case 5: - write(2, src->data, n); + if(!debug) + write(2, src->data, n); skip(src, n); break; default: @@ -217,6 +231,9 @@ case 'c': ofd = 1; break; + case 'v': + debug = 1; + break; }ARGEND; if(*argv != nil) fd = open(*argv, OREAD); @@ -229,6 +246,8 @@ get16(nil); ntrack = get16(nil); div = get16(nil); + if(debug) + fprint(2, "div %d\n", div); tr = emallocz(ntrack * sizeof(*tr)); for(i = 0; i < ntrack; i++){ if(get32(nil) != 0x4D54726B)