/**
Runs the clip depending on the current data path and transfer state.
For example, fills the sink buffer if TDataPathState is EPlaying and TTransferState is ENeedSinkData.
*/
void CMMFDataPath2::RunL()
{
#ifdef _DP_DEBUG
RDebug::Print(_L("DP::RunL transfer state %d, iPausedCalled %d, tick-%d (this 0x%x)\n"),iTransferState, iPauseCalled, User::TickCount(),this);
#endif
switch (iState)
{
case EStopped:
break;
case EPrimed: // In the paused state we still continue to feed buffers to the sink. The sink (DevSound) handles the logic of whether the buffers should be emptied
{
if (!iPauseCalled || !iIsUsingResumeSupport)
break;
}
// fall-through
case EPlaying:
case ERecording:
case EConverting:
switch (iTransferState)
{
case EWaitSink:
case EWaitSource:
break;
case EInitializeSink:
InitializeSinkL();
break;
case EInitializeSource:
InitializeSourceL();
break;
case ENeedSourceData:
FillSourceBufferL();
break;
case ENeedSinkData:
FillSinkBufferL();
break;
case ENeedToMatchSourceToSink:
FillSinkBufferL();
break;
case ESendDataToSink:
EmptySinkBufferL();
break;
case EEndOfData:
EndOfData();
break;
}
break;
default:
break;
}
#ifdef _DP_DEBUG
RDebug::Print(_L("DP::RunL DONE\n"));
#endif
}
/* Expand group-3 2-dimensional data */
void
g32expand(struct pagenode *pn, drawfunc df)
{
int RunLength; /* Length of current run */
int a0; /* reference element */
int b1; /* next change on previous line */
int lastx = pn->size.width();/* copy line width to register */
pixnum *run0, *run1; /* run length arrays */
pixnum *thisrun, *pa, *pb; /* pointers into runs */
t16bits *sp; /* pointer into compressed data */
t32bits BitAcc; /* bit accumulator */
int BitsAvail; /* # valid bits in BitAcc */
int EOLcnt; /* number of consecutive EOLs */
int refline = 0; /* 1D encoded reference line */
int LineNum; /* line number */
struct tabent *TabEnt;
sp = pn->data;
BitAcc = 0;
BitsAvail = 0;
/* allocate space for 2 runlength arrays */
run0 = (pixnum *) malloc(2 * ((lastx+5)&~1) * sizeof(pixnum));
run1 = run0 + ((lastx+5)&~1);
run1[0] = lastx;
run1[1] = 0;
EOLcnt = 0;
for (LineNum = 0; LineNum < pn->rowsperstrip; ) {
#ifdef DEBUG_FAX
printf("\nBitAcc=%08lX, BitsAvail = %d\n", BitAcc, BitsAvail);
printf("-------------------- %d\n", LineNum);
fflush(stdout);
#endif
if (EOLcnt == 0)
while (!EndOfData(pn)) {
/* skip over garbage after a coding error */
NeedBits(11);
if (GetBits(11) == 0)
break;
ClrBits(1);
}
for (EOLcnt = 1; !EndOfData(pn); EOLcnt++) {
/* we have seen 11 zeros, which implies EOL,
skip possible fill bits too */
while (1) {
NeedBits(8);
if (GetBits(8))
break;
ClrBits(8);
}
while (GetBits(1) == 0)
ClrBits(1);
ClrBits(1); /* the eol flag */
NeedBits(12);
refline = GetBits(1); /* 1D / 2D flag */
ClrBits(1);
if (GetBits(11))
break;
ClrBits(11);
}
if (EOLcnt > 1 && EOLcnt != 6 && verbose)
kError() << "Line " << LineNum << ": bad RTC (" << EOLcnt << " EOLs)\n";
if (EOLcnt >= 6 || EndOfData(pn)) {
free(run0);
return;
}
if (LineNum == 0 && refline == 0 && verbose)
kDebug() << "First line is 2-D encoded\n";
RunLength = 0;
if (LineNum & 1) {
pa = run1;
pb = run0;
}
else {
pa = run0;
pb = run1;
}
thisrun = pa;
EOLcnt = 0;
a0 = 0;
b1 = *pb++;
if (refline) {
expand1d();
}
else {
expand2d(EOL2);
}
if (RunLength)
SETVAL(0);
if (a0 != lastx) {
if (verbose)
kWarning() << "Line " << LineNum << ": length is "
<< a0 << " (expected "<< lastx << ")\n";
while (a0 > lastx)
a0 -= *--pa;
if (a0 < lastx) {
if ((pa - run0) & 1)
SETVAL(0);
SETVAL(lastx - a0);
}
}
SETVAL(0); /* imaginary change at end of line for reference */
(*df)(thisrun, LineNum++, pn);
}
free(run0);
}
/* Expand group-3 1-dimensional data */
void
g31expand(struct pagenode *pn, drawfunc df)
{
int a0; /* reference element */
int lastx; /* copy line width to register */
t32bits BitAcc; /* bit accumulator */
int BitsAvail; /* # valid bits in BitAcc */
int RunLength; /* Length of current run */
t16bits *sp; /* pointer into compressed data */
pixnum *pa; /* pointer into new line */
int EOLcnt; /* number of consecutive EOLs */
int LineNum; /* line number */
pixnum *runs; /* list of run lengths */
struct tabent *TabEnt;
sp = pn->data;
BitAcc = 0;
BitsAvail = 0;
lastx = pn->size.width();
runs = (pixnum *) malloc(lastx * sizeof(pixnum));
EOLcnt = 0;
for (LineNum = 0; LineNum < pn->rowsperstrip; ) {
#ifdef DEBUG_FAX
fprintf(stderr,"\nBitAcc=%08lX, BitsAvail = %d\n", BitAcc, BitsAvail);
fprintf(stderr,"-------------------- %d\n", LineNum);
fflush(stderr);
#endif
if (EOLcnt == 0)
while (!EndOfData(pn)) {
/* skip over garbage after a coding error */
NeedBits(11);
if (GetBits(11) == 0)
break;
ClrBits(1);
}
for (EOLcnt = 1; !EndOfData(pn); EOLcnt++) {
/* we have seen 11 zeros, which implies EOL,
skip possible fill bits too */
while (1) {
NeedBits(8);
if (GetBits(8))
break;
ClrBits(8);
}
while (GetBits(1) == 0)
ClrBits(1);
ClrBits(1); /* the eol flag */
NeedBits(11);
if (GetBits(11))
break;
ClrBits(11);
}
if (EOLcnt > 1 && EOLcnt != 6 && verbose) {
kError() << "Line " << LineNum << ": bad RTC (" << EOLcnt << " EOLs)\n";
}
if (EOLcnt >= 6 || EndOfData(pn)) {
free(runs);
return;
}
RunLength = 0;
pa = runs;
a0 = 0;
EOLcnt = 0;
expand1d();
if (RunLength)
SETVAL(0);
if (a0 != lastx) {
if (verbose)
kWarning() << "Line " << LineNum << ": length is "
<< a0 << " (expected "<< lastx << ")\n";
while (a0 > lastx)
a0 -= *--pa;
if (a0 < lastx) {
if ((pa - runs) & 1)
SETVAL(0);
SETVAL(lastx - a0);
}
}
(*df)(runs, LineNum++, pn);
}
free(runs);
}