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MIPS: mips32: code rebase

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mips code rebased to be same as C code
from commit I8c29a8a0285076cb3423b01ffae9fcc465da6a81

Change-Id: I3848f4ce43387c3a62b336606498779f7b07ec44
This commit is contained in:
Djordje Pesut 2014-08-19 15:10:30 +02:00
parent 569771549a
commit f4ae143720
1 changed files with 12 additions and 7 deletions
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19
src/dsp/dec_mips32.c
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@ -52,6 +52,7 @@ static WEBP_INLINE void do_filter6(uint8_t* p, int step) {
const int p2 = p[-3 * step], p1 = p[-2 * step], p0 = p[-step];
const int q0 = p[0], q1 = p[step], q2 = p[2 * step];
const int a = VP8ksclip1[3 * (q0 - p0) + VP8ksclip1[p1 - q1]];
// a is in [-128,127], a1 in [-27,27], a2 in [-18,18] and a3 in [-9,9]
const int a1 = (27 * a + 63) >> 7; // eq. to ((3 * a + 7) * 9) >> 7
const int a2 = (18 * a + 63) >> 7; // eq. to ((2 * a + 7) * 9) >> 7
const int a3 = (9 * a + 63) >> 7; // eq. to ((1 * a + 7) * 9) >> 7
@ -68,9 +69,9 @@ static WEBP_INLINE int hev(const uint8_t* p, int step, int thresh) {
return (abs_mips32(p1 - p0) > thresh) || (abs_mips32(q1 - q0) > thresh);
}
static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int thresh) {
static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int t) {
const int p1 = p[-2 * step], p0 = p[-step], q0 = p[0], q1 = p[step];
return ((2 * abs_mips32(p0 - q0) + (abs_mips32(p1 - q1) >> 1)) <= thresh);
return ((4 * abs_mips32(p0 - q0) + abs_mips32(p1 - q1)) <= t);
}
static WEBP_INLINE int needs_filter2(const uint8_t* p,
@ -78,7 +79,7 @@ static WEBP_INLINE int needs_filter2(const uint8_t* p,
const int p3 = p[-4 * step], p2 = p[-3 * step];
const int p1 = p[-2 * step], p0 = p[-step];
const int q0 = p[0], q1 = p[step], q2 = p[2 * step], q3 = p[3 * step];
if ((2 * abs_mips32(p0 - q0) + (abs_mips32(p1 - q1) >> 1)) > t) {
if ((4 * abs_mips32(p0 - q0) + abs_mips32(p1 - q1)) > t) {
return 0;
}
return abs_mips32(p3 - p2) <= it && abs_mips32(p2 - p1) <= it &&
@ -89,8 +90,9 @@ static WEBP_INLINE int needs_filter2(const uint8_t* p,
static WEBP_INLINE void FilterLoop26(uint8_t* p,
int hstride, int vstride, int size,
int thresh, int ithresh, int hev_thresh) {
const int thresh2 = 2 * thresh + 1;
while (size-- > 0) {
if (needs_filter2(p, hstride, thresh, ithresh)) {
if (needs_filter2(p, hstride, thresh2, ithresh)) {
if (hev(p, hstride, hev_thresh)) {
do_filter2(p, hstride);
} else {
@ -104,8 +106,9 @@ static WEBP_INLINE void FilterLoop26(uint8_t* p,
static WEBP_INLINE void FilterLoop24(uint8_t* p,
int hstride, int vstride, int size,
int thresh, int ithresh, int hev_thresh) {
const int thresh2 = 2 * thresh + 1;
while (size-- > 0) {
if (needs_filter2(p, hstride, thresh, ithresh)) {
if (needs_filter2(p, hstride, thresh2, ithresh)) {
if (hev(p, hstride, hev_thresh)) {
do_filter2(p, hstride);
} else {
@ -176,8 +179,9 @@ static void HFilter16i(uint8_t* p, int stride,
static void SimpleVFilter16(uint8_t* p, int stride, int thresh) {
int i;
const int thresh2 = 2 * thresh + 1;
for (i = 0; i < 16; ++i) {
if (needs_filter(p + i, stride, thresh)) {
if (needs_filter(p + i, stride, thresh2)) {
do_filter2(p + i, stride);
}
}
@ -185,8 +189,9 @@ static void SimpleVFilter16(uint8_t* p, int stride, int thresh) {
static void SimpleHFilter16(uint8_t* p, int stride, int thresh) {
int i;
const int thresh2 = 2 * thresh + 1;
for (i = 0; i < 16; ++i) {
if (needs_filter(p + i * stride, 1, thresh)) {
if (needs_filter(p + i * stride, 1, thresh2)) {
do_filter2(p + i * stride, 1);
}
}