/*
* infer endings from the beginnings of other tracks.
*/
static int
mmcinfertracks(Drive *drive, int first, int last)
{
int i;
uint8_t resp[1024];
uint32_t tot;
Track *t;
if (vflag)
fprint(2, "inferring tracks from toc\n");
for(i = first; i <= last; i++) {
memset(resp, 0, sizeof(resp));
if(mmcreadtoc(drive, 0, i, resp, sizeof(resp)) < 0) {
last = i - 1;
if (last < 1)
last = 1;
break;
}
t = &drive->track[i-first];
t->mtime = drive->changetime;
t->type = TypeData;
t->bs = BScdrom;
t->beg = bige(resp+8);
if(!(resp[5] & 4)) {
t->type = TypeAudio;
t->bs = BScdda;
}
}
if((int32_t)drive->track[0].beg < 0) /* i've seen negative track 0's */
drive->track[0].beg = 0;
tot = 0;
memset(resp, 0, sizeof(resp));
/* 0xAA is lead-out */
if(mmcreadtoc(drive, 0, 0xAA, resp, sizeof(resp)) < 0)
print("bad mmcreadtoc\n");
if(resp[6])
tot = bige(resp+8);
t = nil;
for(i=last; i>=first; i--) {
t = &drive->track[i-first];
t->end = tot;
tot = t->beg;
if(t->end <= t->beg)
t->beg = t->end = 0;
/* -2: skip lead out */
t->size = (t->end - t->beg - 2) * (int64_t)t->bs;
}
fprint(2, "infertracks: nwa should be %,lld; tot = %,ld\n", t->size, tot);
return last;
}
/* t is a track number on disc, i is an index into drive->track[] for result */
static int
mmctrackinfo(Drive *drive, int t, int i)
{
int n, type, bs;
uint32_t beg, size;
uint8_t tmode;
uint8_t cmd[10], resp[255];
Track *track;
initcdb(cmd, sizeof cmd, ScmdRtrackinfo);
cmd[1] = 1; /* address below is logical track # */
cmd[2] = t>>24;
cmd[3] = t>>16;
cmd[4] = t>>8;
cmd[5] = t;
cmd[7] = sizeof(resp)>>8;
cmd[8] = sizeof(resp);
n = scsi(&drive->scsi, cmd, sizeof(cmd), resp, sizeof(resp), Sread);
if(n < 28) {
if(vflag)
print("trackinfo %d fails n=%d: %r\n", t, n);
return -1;
}
tmode = resp[5] & 0x0D;
// dmode = resp[6] & 0x0F;
gettypebs(tmode, t, i, &type, &bs);
beg = bige(&resp[8]);
size = bige(&resp[24]);
track = &drive->track[i];
track->mtime = drive->changetime;
track->beg = beg;
track->end = beg + size;
track->type = type;
track->bs = bs;
track->size = (int64_t)(size-2) * bs; /* -2: skip lead out */
if(resp[6] & (1<<6)) { /* blank? */
track->type = TypeBlank;
drive->writeok = Yes;
}
if(vflag)
print(" start %lu end %lu", beg, beg + size - 1);
gettracknwa(drive, t, beg, resp);
if (vflag)
print("\n");
return 0;
}
/*
* figure out the first writable block, if we can, into drive->aux->mmcnwa.
* resp must be from ScmdRtrackinfo.
*/
static int32_t
gettracknwa(Drive *drive, int t, uint32_t beg, uint8_t *resp)
{
int32_t newnwa;
Mmcaux *aux;
aux = drive->aux;
if(resp[7] & 1) { /* nwa valid? */
newnwa = bige(&resp[12]);
if (newnwa >= 0)
if (aux->mmcnwa < 0)
aux->mmcnwa = newnwa;
else if (aux->mmcnwa != newnwa)
fprint(2, "nwa is %ld but invis track starts blk %ld\n",
newnwa, aux->mmcnwa);
}
/* resp[6] & (1<<7) of zero: invisible track */
if(t == Invistrack || t == drive->invistrack)
if (aux->mmcnwa < 0)
aux->mmcnwa = beg;
else if (aux->mmcnwa != beg)
fprint(2, "invis track starts blk %ld but nwa is %ld\n",
beg, aux->mmcnwa);
if (vflag && aux->mmcnwa >= 0)
print(" nwa %lu", aux->mmcnwa);
return 0;
}
/*
* infer endings from the beginnings of other tracks.
*/
static void
mmcinfertracks(Drive *drive, int first, int last)
{
int i;
uchar resp[1024];
ulong tot;
Track *t;
if (vflag)
fprint(2, "inferring tracks\n");
for(i = first; i <= last; i++) {
memset(resp, 0, sizeof(resp));
if(mmcreadtoc(drive, 0, i, resp, sizeof(resp)) < 0)
break;
t = &drive->track[i-first];
t->mtime = drive->changetime;
t->type = TypeData;
t->bs = BScdrom;
t->beg = bige(resp+8);
if(!(resp[5] & 4)) {
t->type = TypeAudio;
t->bs = BScdda;
}
}
if((long)drive->track[0].beg < 0) /* i've seen negative track 0's */
drive->track[0].beg = 0;
tot = 0;
memset(resp, 0, sizeof(resp));
/* 0xAA is lead-out */
if(mmcreadtoc(drive, 0, 0xAA, resp, sizeof(resp)) < 0)
print("bad\n");
if(resp[6])
tot = bige(resp+8);
for(i=last; i>=first; i--) {
t = &drive->track[i-first];
t->end = tot;
tot = t->beg;
if(t->end <= t->beg)
t->beg = t->end = 0;
/* -2: skip lead out */
t->size = (t->end - t->beg - 2) * (vlong)t->bs;
}
}
/* t is a track number on disc, i is an index into drive->track[] for result */
static int
mmctrackinfo(Drive *drive, int t, int i)
{
int n, type, bs;
ulong beg, size;
uchar tmode;
uchar cmd[10], resp[255];
Mmcaux *aux;
aux = drive->aux;
memset(cmd, 0, sizeof(cmd));
cmd[0] = ScmdRtrackinfo;
cmd[1] = 1; /* address below is logical track # */
cmd[2] = t>>24;
cmd[3] = t>>16;
cmd[4] = t>>8;
cmd[5] = t;
cmd[7] = sizeof(resp)>>8;
cmd[8] = sizeof(resp);
n = scsi(drive, cmd, sizeof(cmd), resp, sizeof(resp), Sread);
if(n < 28) {
if(vflag)
print("trackinfo %d fails n=%d: %r\n", t, n);
return -1;
}
beg = bige(&resp[8]);
size = bige(&resp[24]);
tmode = resp[5] & 0x0D;
// dmode = resp[6] & 0x0F;
if(vflag)
print("track %d type %d (%s)", t, tmode,
(tmode < nelem(tracktype)? tracktype[tmode]: "**GOK**"));
type = TypeNone;
bs = BScdda;
switch(tmode){
case Tmcdda:
type = TypeAudio;
bs = BScdda;
break;
case Tm2audio: /* 2 audio channels, with pre-emphasis 50/15 μs */
if(vflag)
print("audio channels with preemphasis on track %d "
"(u%.3d)\n", t, i);
type = TypeNone;
break;
case Tmunintr: /* data track, recorded uninterrupted */
case Tmintr: /* data track, recorded interrupted */
/* treat Tmintr (5) as cdrom; it's probably dvd or bd */
type = TypeData;
bs = BScdrom;
break;
default:
if(vflag)
print("unknown track type %d\n", tmode);
break;
}
drive->track[i].mtime = drive->changetime;
drive->track[i].beg = beg;
drive->track[i].end = beg+size;
drive->track[i].type = type;
drive->track[i].bs = bs;
drive->track[i].size = (vlong)(size-2) * bs; /* -2: skip lead out */
if(resp[6] & (1<<6)) { /* blank? */
drive->track[i].type = TypeBlank;
drive->writeok = 1;
}
if(vflag)
print(" start %lud end %lud", beg, beg + size - 1);
/* resp[6] & (1<<7) of zero: invisible track */
/* t == getinvistrack(): invisible track */
if(t == Invistrack || resp[7] & 1) { /* invis or nwa valid? */
aux->mmcnwa = bige(&resp[12]);
if ((long)aux->mmcnwa < 0) /* implausible? */
aux->mmcnwa = 0;
if (vflag)
print(" nwa %lud", aux->mmcnwa);
}
if (vflag)
print("\n");
return 0;
}
