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T1: loop unrolling in dec_sigpass_raw and dec_refpass_raw

This commit is contained in:
Even Rouault 2017-05-31 17:15:27 +02:00
parent 68557ff503
commit aa7a8a4398
1 changed files with 119 additions and 17 deletions
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136
src/lib/openjp2/t1.c
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@ -630,28 +630,91 @@ static void opj_t1_dec_sigpass_raw(
OPJ_INT32 bpno,
OPJ_INT32 cblksty)
{
OPJ_INT32 one, half, oneplushalf, vsc;
OPJ_INT32 one, half, oneplushalf;
OPJ_UINT32 i, j, k;
opj_flag_t *flagsp = &T1_FLAGS(0, 0);
one = 1 << bpno;
half = one >> 1;
oneplushalf = one | half;
for (k = 0; k < t1->h; k += 4) {
for (i = 0; i < t1->w; ++i) {
opj_flag_t *flagsp2 = flagsp + i;
for (j = k; j < k + 4 && j < t1->h; ++j) {
vsc = ((cblksty & J2K_CCP_CBLKSTY_VSC) && (j == k + 3 ||
j == t1->h - 1)) ? 1 : 0;
if ((cblksty & J2K_CCP_CBLKSTY_VSC)) {
OPJ_INT32 *data1 = t1->data;
for (k = 0; k < t1->h; k += 4) {
for (i = 0; i < t1->w; ++i) {
OPJ_INT32* data2 = data1 + i;
opj_flag_t *flagsp2 = flagsp + i;
for (j = k; j < k + 4 && j < t1->h; ++j) {
OPJ_INT32 vsc = (j == k + 3 || j == t1->h - 1) ? 1 : 0;
opj_t1_dec_sigpass_step_raw(
t1,
flagsp2,
data2,
oneplushalf,
vsc,
j - k);
data2 += t1->w;
}
}
data1 += t1->w << 2;
flagsp += t1->flags_stride;
}
} else {
OPJ_INT32 *data1 = t1->data;
for (k = 0; k < (t1->h & ~3U); k += 4) {
for (i = 0; i < t1->w; ++i) {
OPJ_INT32* data2 = data1 + i;
opj_flag_t *flagsp2 = flagsp + i;
opj_t1_dec_sigpass_step_raw(
t1,
flagsp2,
&t1->data[(j * t1->w) + i],
data2,
oneplushalf,
vsc,
j - k);
0, /* vsc */
0U);
data2 += t1->w;
opj_t1_dec_sigpass_step_raw(
t1,
flagsp2,
data2,
oneplushalf,
0, /* vsc */
1U);
data2 += t1->w;
opj_t1_dec_sigpass_step_raw(
t1,
flagsp2,
data2,
oneplushalf,
0, /* vsc */
2U);
data2 += t1->w;
opj_t1_dec_sigpass_step_raw(
t1,
flagsp2,
data2,
oneplushalf,
0, /* vsc */
3U);
data2 += t1->w;
}
data1 += t1->w << 2;
flagsp += t1->flags_stride;
}
if (k < t1->h) {
for (i = 0; i < t1->w; ++i) {
OPJ_INT32* data2 = data1 + i;
opj_flag_t *flagsp2 = flagsp + i;
for (j = 0; j < t1->h - k; ++j) {
opj_t1_dec_sigpass_step_raw(
t1,
flagsp2,
data2,
oneplushalf,
0, /* vsc */
j);
data2 += t1->w;
}
}
}
flagsp += t1->flags_stride;
}
}
@ -798,13 +861,14 @@ static INLINE void opj_t1_dec_refpass_step_raw(
OPJ_INT32 neghalf,
OPJ_UINT32 ci)
{
OPJ_INT32 v, t;
OPJ_UINT32 v;
OPJ_INT32 t;
opj_raw_t *raw = t1->raw; /* RAW component */
if ((*flagsp & ((T1_SIGMA_THIS | T1_PI_THIS) << (ci * 3U))) ==
(T1_SIGMA_THIS << (ci * 3U))) {
v = (OPJ_INT32)opj_raw_decode(raw);
v = opj_raw_decode(raw);
t = v ? poshalf : neghalf;
*datap += *datap < 0 ? -t : t;
*flagsp |= T1_MU_THIS << (ci * 3U);
@ -981,23 +1045,61 @@ static void opj_t1_dec_refpass_raw(
{
OPJ_INT32 one, poshalf, neghalf;
OPJ_UINT32 i, j, k;
OPJ_INT32 *data1 = t1->data;
opj_flag_t *flagsp1 = &T1_FLAGS(0, 0);
one = 1 << bpno;
poshalf = one >> 1;
neghalf = bpno > 0 ? -poshalf : -1;
for (k = 0; k < t1->h; k += 4) {
for (k = 0; k < (t1->h & ~3U); k += 4) {
for (i = 0; i < t1->w; ++i) {
OPJ_INT32 *data2 = data1 + i;
opj_flag_t *flagsp2 = flagsp1 + i;
for (j = k; j < k + 4 && j < t1->h; ++j) {
opj_t1_dec_refpass_step_raw(
t1,
flagsp2,
data2,
poshalf,
neghalf, 0U);
data2 += t1->w;
opj_t1_dec_refpass_step_raw(
t1,
flagsp2,
data2,
poshalf,
neghalf, 1U);
data2 += t1->w;
opj_t1_dec_refpass_step_raw(
t1,
flagsp2,
data2,
poshalf,
neghalf, 2U);
data2 += t1->w;
opj_t1_dec_refpass_step_raw(
t1,
flagsp2,
data2,
poshalf,
neghalf, 3U);
data2 += t1->w;
}
data1 += t1->w << 2;
flagsp1 += t1->flags_stride;
}
if (k < t1->h) {
for (i = 0; i < t1->w; ++i) {
OPJ_INT32 *data2 = data1 + i;
opj_flag_t *flagsp2 = flagsp1 + i;
for (j = k; j < t1->h; ++j) {
opj_t1_dec_refpass_step_raw(
t1,
flagsp2,
&t1->data[(j * t1->w) + i],
data2,
poshalf,
neghalf, j - k);
data2 += t1->w;
}
}
flagsp1 += t1->flags_stride;
}
}