static __inline void vp8_filter(signed char mask, uc hev, uc *op1,
uc *op0, uc *oq0, uc *oq1)
{
signed char ps0, qs0;
signed char ps1, qs1;
signed char vp8_filter, Filter1, Filter2;
signed char u;
ps1 = (signed char) * op1 ^ 0x80;
ps0 = (signed char) * op0 ^ 0x80;
qs0 = (signed char) * oq0 ^ 0x80;
qs1 = (signed char) * oq1 ^ 0x80;
/* add outer taps if we have high edge variance */
vp8_filter = vp8_signed_char_clamp(ps1 - qs1);
vp8_filter &= hev;
/* inner taps */
vp8_filter = vp8_signed_char_clamp(vp8_filter + 3 * (qs0 - ps0));
vp8_filter &= mask;
/* save bottom 3 bits so that we round one side +4 and the other +3
* if it equals 4 we'll set to adjust by -1 to account for the fact
* we'd round 3 the other way
*/
Filter1 = vp8_signed_char_clamp(vp8_filter + 4);
Filter2 = vp8_signed_char_clamp(vp8_filter + 3);
Filter1 >>= 3;
Filter2 >>= 3;
u = vp8_signed_char_clamp(qs0 - Filter1);
*oq0 = u ^ 0x80;
u = vp8_signed_char_clamp(ps0 + Filter2);
*op0 = u ^ 0x80;
vp8_filter = Filter1;
/* outer tap adjustments */
vp8_filter += 1;
vp8_filter >>= 1;
vp8_filter &= ~hev;
u = vp8_signed_char_clamp(qs1 - vp8_filter);
*oq1 = u ^ 0x80;
u = vp8_signed_char_clamp(ps1 + vp8_filter);
*op1 = u ^ 0x80;
}
static void vp8_filter(signed char mask, uc hev, uc *op1,
uc *op0, uc *oq0, uc *oq1)
{
signed char ps0, qs0;
signed char ps1, qs1;
signed char filter_value, Filter1, Filter2;
signed char u;
ps1 = (signed char) * op1 ^ 0x80;
ps0 = (signed char) * op0 ^ 0x80;
qs0 = (signed char) * oq0 ^ 0x80;
qs1 = (signed char) * oq1 ^ 0x80;
filter_value = vp8_signed_char_clamp(ps1 - qs1);
filter_value &= hev;
filter_value = vp8_signed_char_clamp(filter_value + 3 * (qs0 - ps0));
filter_value &= mask;
Filter1 = vp8_signed_char_clamp(filter_value + 4);
Filter2 = vp8_signed_char_clamp(filter_value + 3);
Filter1 >>= 3;
Filter2 >>= 3;
u = vp8_signed_char_clamp(qs0 - Filter1);
*oq0 = u ^ 0x80;
u = vp8_signed_char_clamp(ps0 + Filter2);
*op0 = u ^ 0x80;
filter_value = Filter1;
filter_value += 1;
filter_value >>= 1;
filter_value &= ~hev;
u = vp8_signed_char_clamp(qs1 - filter_value);
*oq1 = u ^ 0x80;
u = vp8_signed_char_clamp(ps1 + filter_value);
*op1 = u ^ 0x80;
}
static __inline void vp8_simple_filter(signed char mask, uc *op1, uc *op0, uc *oq0, uc *oq1)
{
signed char vp8_filter, Filter1, Filter2;
signed char p1 = (signed char) * op1 ^ 0x80;
signed char p0 = (signed char) * op0 ^ 0x80;
signed char q0 = (signed char) * oq0 ^ 0x80;
signed char q1 = (signed char) * oq1 ^ 0x80;
signed char u;
vp8_filter = vp8_signed_char_clamp(p1 - q1);
vp8_filter = vp8_signed_char_clamp(vp8_filter + 3 * (q0 - p0));
vp8_filter &= mask;
/* save bottom 3 bits so that we round one side +4 and the other +3 */
Filter1 = vp8_signed_char_clamp(vp8_filter + 4);
Filter1 >>= 3;
u = vp8_signed_char_clamp(q0 - Filter1);
*oq0 = u ^ 0x80;
Filter2 = vp8_signed_char_clamp(vp8_filter + 3);
Filter2 >>= 3;
u = vp8_signed_char_clamp(p0 + Filter2);
*op0 = u ^ 0x80;
}
static void vp8_simple_filter(signed char mask, uc *op1, uc *op0, uc *oq0, uc *oq1)
{
signed char filter_value, Filter1, Filter2;
signed char p1 = (signed char) * op1 ^ 0x80;
signed char p0 = (signed char) * op0 ^ 0x80;
signed char q0 = (signed char) * oq0 ^ 0x80;
signed char q1 = (signed char) * oq1 ^ 0x80;
signed char u;
filter_value = vp8_signed_char_clamp(p1 - q1);
filter_value = vp8_signed_char_clamp(filter_value + 3 * (q0 - p0));
filter_value &= mask;
Filter1 = vp8_signed_char_clamp(filter_value + 4);
Filter1 >>= 3;
u = vp8_signed_char_clamp(q0 - Filter1);
*oq0 = u ^ 0x80;
Filter2 = vp8_signed_char_clamp(filter_value + 3);
Filter2 >>= 3;
u = vp8_signed_char_clamp(p0 + Filter2);
*op0 = u ^ 0x80;
}
static __inline void vp8_mbfilter(signed char mask, uc hev,
uc *op2, uc *op1, uc *op0, uc *oq0, uc *oq1, uc *oq2)
{
signed char s, u;
signed char vp8_filter, Filter1, Filter2;
signed char ps2 = (signed char) * op2 ^ 0x80;
signed char ps1 = (signed char) * op1 ^ 0x80;
signed char ps0 = (signed char) * op0 ^ 0x80;
signed char qs0 = (signed char) * oq0 ^ 0x80;
signed char qs1 = (signed char) * oq1 ^ 0x80;
signed char qs2 = (signed char) * oq2 ^ 0x80;
/* add outer taps if we have high edge variance */
vp8_filter = vp8_signed_char_clamp(ps1 - qs1);
vp8_filter = vp8_signed_char_clamp(vp8_filter + 3 * (qs0 - ps0));
vp8_filter &= mask;
Filter2 = vp8_filter;
Filter2 &= hev;
/* save bottom 3 bits so that we round one side +4 and the other +3 */
Filter1 = vp8_signed_char_clamp(Filter2 + 4);
Filter2 = vp8_signed_char_clamp(Filter2 + 3);
Filter1 >>= 3;
Filter2 >>= 3;
qs0 = vp8_signed_char_clamp(qs0 - Filter1);
ps0 = vp8_signed_char_clamp(ps0 + Filter2);
/* only apply wider filter if not high edge variance */
vp8_filter &= ~hev;
Filter2 = vp8_filter;
/* roughly 3/7th difference across boundary */
u = vp8_signed_char_clamp((63 + Filter2 * 27) >> 7);
s = vp8_signed_char_clamp(qs0 - u);
*oq0 = s ^ 0x80;
s = vp8_signed_char_clamp(ps0 + u);
*op0 = s ^ 0x80;
/* roughly 2/7th difference across boundary */
u = vp8_signed_char_clamp((63 + Filter2 * 18) >> 7);
s = vp8_signed_char_clamp(qs1 - u);
*oq1 = s ^ 0x80;
s = vp8_signed_char_clamp(ps1 + u);
*op1 = s ^ 0x80;
/* roughly 1/7th difference across boundary */
u = vp8_signed_char_clamp((63 + Filter2 * 9) >> 7);
s = vp8_signed_char_clamp(qs2 - u);
*oq2 = s ^ 0x80;
s = vp8_signed_char_clamp(ps2 + u);
*op2 = s ^ 0x80;
}
static void vp8_mbfilter(signed char mask, uc hev,
uc *op2, uc *op1, uc *op0, uc *oq0, uc *oq1, uc *oq2)
{
signed char s, u;
signed char filter_value, Filter1, Filter2;
signed char ps2 = (signed char) * op2 ^ 0x80;
signed char ps1 = (signed char) * op1 ^ 0x80;
signed char ps0 = (signed char) * op0 ^ 0x80;
signed char qs0 = (signed char) * oq0 ^ 0x80;
signed char qs1 = (signed char) * oq1 ^ 0x80;
signed char qs2 = (signed char) * oq2 ^ 0x80;
filter_value = vp8_signed_char_clamp(ps1 - qs1);
filter_value = vp8_signed_char_clamp(filter_value + 3 * (qs0 - ps0));
filter_value &= mask;
Filter2 = filter_value;
Filter2 &= hev;
Filter1 = vp8_signed_char_clamp(Filter2 + 4);
Filter2 = vp8_signed_char_clamp(Filter2 + 3);
Filter1 >>= 3;
Filter2 >>= 3;
qs0 = vp8_signed_char_clamp(qs0 - Filter1);
ps0 = vp8_signed_char_clamp(ps0 + Filter2);
filter_value &= ~hev;
Filter2 = filter_value;
u = vp8_signed_char_clamp((63 + Filter2 * 27) >> 7);
s = vp8_signed_char_clamp(qs0 - u);
*oq0 = s ^ 0x80;
s = vp8_signed_char_clamp(ps0 + u);
*op0 = s ^ 0x80;
u = vp8_signed_char_clamp((63 + Filter2 * 18) >> 7);
s = vp8_signed_char_clamp(qs1 - u);
*oq1 = s ^ 0x80;
s = vp8_signed_char_clamp(ps1 + u);
*op1 = s ^ 0x80;
u = vp8_signed_char_clamp((63 + Filter2 * 9) >> 7);
s = vp8_signed_char_clamp(qs2 - u);
*oq2 = s ^ 0x80;
s = vp8_signed_char_clamp(ps2 + u);
*op2 = s ^ 0x80;
}
