📄 jpc_t1enc.c
字号:
*(fp) |= JPC_SIG; \
} \
*(fp) |= JPC_VISIT; \
} \
}
static int jpc_encrawsigpass(jpc_bitstream_t *out, int bitpos, int vcausalflag, jas_matrix_t *flags,
jas_matrix_t *data, int term, long *nmsedec)
{
int i;
int j;
int k;
int one;
int vscanlen;
int width;
int height;
int frowstep;
int drowstep;
int fstripestep;
int dstripestep;
jpc_fix_t *fstripestart;
jpc_fix_t *dstripestart;
jpc_fix_t *fp;
jpc_fix_t *dp;
jpc_fix_t *fvscanstart;
jpc_fix_t *dvscanstart;
*nmsedec = 0;
width = jas_matrix_numcols(data);
height = jas_matrix_numrows(data);
frowstep = jas_matrix_rowstep(flags);
drowstep = jas_matrix_rowstep(data);
fstripestep = frowstep << 2;
dstripestep = drowstep << 2;
one = 1 << (bitpos + JPC_NUMEXTRABITS);
fstripestart = jas_matrix_getref(flags, 1, 1);
dstripestart = jas_matrix_getref(data, 0, 0);
for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
dstripestart += dstripestep) {
fvscanstart = fstripestart;
dvscanstart = dstripestart;
vscanlen = JAS_MIN(i, 4);
for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
dp = dvscanstart;
k = vscanlen;
rawsigpass_step(fp, frowstep, dp, bitpos, one,
nmsedec, out, vcausalflag);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
rawsigpass_step(fp, frowstep, dp, bitpos, one,
nmsedec, out, 0);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
rawsigpass_step(fp, frowstep, dp, bitpos, one,
nmsedec, out, 0);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
rawsigpass_step(fp, frowstep, dp, bitpos, one,
nmsedec, out, 0);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
}
}
if (term) {
jpc_bitstream_outalign(out, 0x2a);
}
return 0;
}
/******************************************************************************\
* Code for refinement pass.
\******************************************************************************/
#define refpass_step(fp, dp, bitpos, one, nmsedec, mqenc, vcausalflag) \
{ \
int v; \
if (((*(fp)) & (JPC_SIG | JPC_VISIT)) == JPC_SIG) { \
(d) = *(dp); \
*(nmsedec) += JPC_GETREFNMSEDEC(abs(d), (bitpos) + JPC_NUMEXTRABITS); \
jpc_mqenc_setcurctx((mqenc), JPC_GETMAGCTXNO(*(fp))); \
v = (abs(d) & (one)) ? 1 : 0; \
jpc_mqenc_putbit((mqenc), v); \
*(fp) |= JPC_REFINE; \
} \
}
static int jpc_encrefpass(jpc_mqenc_t *mqenc, int bitpos, int vcausalflag, jas_matrix_t *flags, jas_matrix_t *data,
int term, long *nmsedec)
{
int i;
int j;
int one;
int vscanlen;
int d;
int width;
int height;
int frowstep;
int drowstep;
int fstripestep;
int dstripestep;
jpc_fix_t *fstripestart;
jpc_fix_t *dstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dvscanstart;
jpc_fix_t *dp;
jpc_fix_t *fp;
int k;
*nmsedec = 0;
width = jas_matrix_numcols(data);
height = jas_matrix_numrows(data);
frowstep = jas_matrix_rowstep(flags);
drowstep = jas_matrix_rowstep(data);
fstripestep = frowstep << 2;
dstripestep = drowstep << 2;
one = 1 << (bitpos + JPC_NUMEXTRABITS);
fstripestart = jas_matrix_getref(flags, 1, 1);
dstripestart = jas_matrix_getref(data, 0, 0);
for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
dstripestart += dstripestep) {
fvscanstart = fstripestart;
dvscanstart = dstripestart;
vscanlen = JAS_MIN(i, 4);
for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
dp = dvscanstart;
k = vscanlen;
refpass_step(fp, dp, bitpos, one, nmsedec,
mqenc, vcausalflag);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
refpass_step(fp, dp, bitpos, one, nmsedec,
mqenc, 0);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
refpass_step(fp, dp, bitpos, one, nmsedec,
mqenc, 0);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
refpass_step(fp, dp, bitpos, one, nmsedec,
mqenc, 0);
}
}
if (term) {
jpc_mqenc_flush(mqenc, term - 1);
}
return jpc_mqenc_error(mqenc) ? (-1) : 0;
}
#define rawrefpass_step(fp, dp, bitpos, one, nmsedec, out, vcausalflag) \
{ \
jpc_fix_t d; \
jpc_fix_t v; \
if (((*(fp)) & (JPC_SIG | JPC_VISIT)) == JPC_SIG) { \
d = *(dp); \
*(nmsedec) += JPC_GETREFNMSEDEC(abs(d), (bitpos) + JPC_NUMEXTRABITS); \
v = (abs(d) & (one)) ? 1 : 0; \
if (jpc_bitstream_putbit((out), v) == EOF) { \
return -1; \
} \
*(fp) |= JPC_REFINE; \
} \
}
static int jpc_encrawrefpass(jpc_bitstream_t *out, int bitpos, int vcausalflag, jas_matrix_t *flags,
jas_matrix_t *data, int term, long *nmsedec)
{
int i;
int j;
int k;
int one;
int vscanlen;
int width;
int height;
int frowstep;
int drowstep;
int fstripestep;
int dstripestep;
jpc_fix_t *fstripestart;
jpc_fix_t *dstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dvscanstart;
jpc_fix_t *dp;
jpc_fix_t *fp;
*nmsedec = 0;
width = jas_matrix_numcols(data);
height = jas_matrix_numrows(data);
frowstep = jas_matrix_rowstep(flags);
drowstep = jas_matrix_rowstep(data);
fstripestep = frowstep << 2;
dstripestep = drowstep << 2;
one = 1 << (bitpos + JPC_NUMEXTRABITS);
fstripestart = jas_matrix_getref(flags, 1, 1);
dstripestart = jas_matrix_getref(data, 0, 0);
for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
dstripestart += dstripestep) {
fvscanstart = fstripestart;
dvscanstart = dstripestart;
vscanlen = JAS_MIN(i, 4);
for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
dp = dvscanstart;
k = vscanlen;
rawrefpass_step(fp, dp, bitpos, one, nmsedec,
out, vcausalflag);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
rawrefpass_step(fp, dp, bitpos, one, nmsedec,
out, vcausalflag);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
rawrefpass_step(fp, dp, bitpos, one, nmsedec,
out, vcausalflag);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
rawrefpass_step(fp, dp, bitpos, one, nmsedec,
out, vcausalflag);
}
}
if (term) {
jpc_bitstream_outalign(out, 0x2a);
}
return 0;
}
/******************************************************************************\
* Code for cleanup pass.
\******************************************************************************/
#define clnpass_step(fp, frowstep, dp, bitpos, one, orient, nmsedec, mqenc, label1, label2, vcausalflag) \
{ \
int f; \
int v; \
label1 \
f = *(fp); \
if (!(f & (JPC_SIG | JPC_VISIT))) { \
jpc_mqenc_setcurctx(mqenc, JPC_GETZCCTXNO(f, (orient))); \
v = (abs(*(dp)) & (one)) ? 1 : 0; \
jpc_mqenc_putbit((mqenc), v); \
if (v) { \
label2 \
f = *(fp); \
/* Coefficient is significant. */ \
*(nmsedec) += JPC_GETSIGNMSEDEC(abs(*(dp)), (bitpos) + JPC_NUMEXTRABITS); \
jpc_mqenc_setcurctx((mqenc), JPC_GETSCCTXNO(f)); \
v = ((*(dp) < 0) ? 1 : 0); \
jpc_mqenc_putbit((mqenc), v ^ JPC_GETSPB(f)); \
JPC_UPDATEFLAGS4((fp), (frowstep), v, vcausalflag); \
*(fp) |= JPC_SIG; \
} \
} \
*(fp) &= ~JPC_VISIT; \
}
static int jpc_encclnpass(jpc_mqenc_t *mqenc, int bitpos, int orient, int vcausalflag, int segsymflag, jas_matrix_t *flags,
jas_matrix_t *data, int term, long *nmsedec)
{
int i;
int j;
int k;
int vscanlen;
int v;
int runlen;
jpc_fix_t *fp;
int width;
int height;
jpc_fix_t *dp;
int one;
int frowstep;
int drowstep;
int fstripestep;
int dstripestep;
jpc_fix_t *fstripestart;
jpc_fix_t *dstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dvscanstart;
*nmsedec = 0;
width = jas_matrix_numcols(data);
height = jas_matrix_numrows(data);
frowstep = jas_matrix_rowstep(flags);
drowstep = jas_matrix_rowstep(data);
fstripestep = frowstep << 2;
dstripestep = drowstep << 2;
one = 1 << (bitpos + JPC_NUMEXTRABITS);
fstripestart = jas_matrix_getref(flags, 1, 1);
dstripestart = jas_matrix_getref(data, 0, 0);
for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
dstripestart += dstripestep) {
fvscanstart = fstripestart;
dvscanstart = dstripestart;
vscanlen = JAS_MIN(i, 4);
for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
if (vscanlen >= 4 && !((*fp) & (JPC_SIG | JPC_VISIT |
JPC_OTHSIGMSK)) && (fp += frowstep, !((*fp) & (JPC_SIG |
JPC_VISIT | JPC_OTHSIGMSK))) && (fp += frowstep, !((*fp) &
(JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK))) && (fp += frowstep,
!((*fp) & (JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK)))) {
dp = dvscanstart;
for (k = 0; k < vscanlen; ++k) {
v = (abs(*dp) & one) ? 1 : 0;
if (v) {
break;
}
dp += drowstep;
}
runlen = k;
if (runlen >= 4) {
jpc_mqenc_setcurctx(mqenc, JPC_AGGCTXNO);
jpc_mqenc_putbit(mqenc, 0);
continue;
}
jpc_mqenc_setcurctx(mqenc, JPC_AGGCTXNO);
jpc_mqenc_putbit(mqenc, 1);
jpc_mqenc_setcurctx(mqenc, JPC_UCTXNO);
jpc_mqenc_putbit(mqenc, runlen >> 1);
jpc_mqenc_putbit(mqenc, runlen & 1);
fp = fvscanstart + frowstep * runlen;
dp = dvscanstart + drowstep * runlen;
k = vscanlen - runlen;
switch (runlen) {
case 0:
goto clnpass_partial0;
break;
case 1:
goto clnpass_partial1;
break;
case 2:
goto clnpass_partial2;
break;
case 3:
goto clnpass_partial3;
break;
}
} else {
runlen = 0;
fp = fvscanstart;
dp = dvscanstart;
k = vscanlen;
goto clnpass_full0;
}
{
int f;
int v;
clnpass_full0:
f = *(fp);
if (!(f & (JPC_SIG | JPC_VISIT))) {
jpc_mqenc_setcurctx(mqenc, JPC_GETZCCTXNO(f, (orient)));
v = (abs(*(dp)) & (one)) ? 1 : 0;
jpc_mqenc_putbit((mqenc), v);
if (v) {
clnpass_partial0:
f = *(fp);
/* Coefficient is significant. */
*(nmsedec) += JPC_GETSIGNMSEDEC(abs(*(dp)), (bitpos) + JPC_NUMEXTRABITS);
jpc_mqenc_setcurctx((mqenc), JPC_GETSCCTXNO(f));
v = ((*(dp) < 0) ? 1 : 0);
jpc_mqenc_putbit((mqenc), v ^ JPC_GETSPB(f));
JPC_UPDATEFLAGS4((fp), (frowstep), v, vcausalflag);
*(fp) |= JPC_SIG;
}
}
*(fp) &= ~JPC_VISIT;
} if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
{
int f;
int v;
;
f = *(fp);
if (!(f & (JPC_SIG | JPC_VISIT))) {
jpc_mqenc_setcurctx(mqenc, JPC_GETZCCTXNO(f, (orient)));
v = (abs(*(dp)) & (one)) ? 1 : 0;
jpc_mqenc_putbit((mqenc), v);
if (v) {
clnpass_partial1:
f = *(fp);
/* Coefficient is significant. */
*(nmsedec) += JPC_GETSIGNMSEDEC(abs(*(dp)), (bitpos) + JPC_NUMEXTRABITS);
jpc_mqenc_setcurctx((mqenc), JPC_GETSCCTXNO(f));
v = ((*(dp) < 0) ? 1 : 0);
jpc_mqenc_putbit((mqenc), v ^ JPC_GETSPB(f));
JPC_UPDATEFLAGS4((fp), (frowstep), v, vcausalflag);
*(fp) |= JPC_SIG;
}
}
*(fp) &= ~JPC_VISIT;
}
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
{
int f;
int v;
;
f = *(fp);
if (!(f & (JPC_SIG | JPC_VISIT))) {
jpc_mqenc_setcurctx(mqenc, JPC_GETZCCTXNO(f, (orient)));
v = (abs(*(dp)) & (one)) ? 1 : 0;
jpc_mqenc_putbit((mqenc), v);
if (v) {
clnpass_partial2:
f = *(fp);
/* Coefficient is significant. */
*(nmsedec) += JPC_GETSIGNMSEDEC(abs(*(dp)), (bitpos) + JPC_NUMEXTRABITS);
jpc_mqenc_setcurctx((mqenc), JPC_GETSCCTXNO(f));
v = ((*(dp) < 0) ? 1 : 0);
jpc_mqenc_putbit((mqenc), v ^ JPC_GETSPB(f));
JPC_UPDATEFLAGS4((fp), (frowstep), v, vcausalflag);
*(fp) |= JPC_SIG;
}
}
*(fp) &= ~JPC_VISIT;
} if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
{
int f;
int v;
;
f = *(fp);
if (!(f & (JPC_SIG | JPC_VISIT))) {
jpc_mqenc_setcurctx(mqenc, JPC_GETZCCTXNO(f, (orient)));
v = (abs(*(dp)) & (one)) ? 1 : 0;
jpc_mqenc_putbit((mqenc), v);
if (v) {
clnpass_partial3:
f = *(fp);
/* Coefficient is significant. */
*(nmsedec) += JPC_GETSIGNMSEDEC(abs(*(dp)), (bitpos) + JPC_NUMEXTRABITS);
jpc_mqenc_setcurctx((mqenc), JPC_GETSCCTXNO(f));
v = ((*(dp) < 0) ? 1 : 0);
jpc_mqenc_putbit((mqenc), v ^ JPC_GETSPB(f));
JPC_UPDATEFLAGS4((fp), (frowstep), v, vcausalflag);
*(fp) |= JPC_SIG;
}
}
*(fp) &= ~JPC_VISIT;
}
}
}
if (segsymflag) {
jpc_mqenc_setcurctx(mqenc, JPC_UCTXNO);
jpc_mqenc_putbit(mqenc, 1);
jpc_mqenc_putbit(mqenc, 0);
jpc_mqenc_putbit(mqenc, 1);
jpc_mqenc_putbit(mqenc, 0);
}
if (term) {
jpc_mqenc_flush(mqenc, term - 1);
}
return jpc_mqenc_error(mqenc) ? (-1) : 0;
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -