You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
379 lines
9.4 KiB
379 lines
9.4 KiB
/*
|
|
* idct_alpha.c
|
|
* Copyright (C) 2002-2003 Falk Hueffner <falk@debian.org>
|
|
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
|
|
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
|
|
*
|
|
* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
|
|
* See http://libmpeg2.sourceforge.net/ for updates.
|
|
*
|
|
* mpeg2dec is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* mpeg2dec is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "k9common.h"
|
|
#ifdef ARCH_ALPHA
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "mpeg2.h"
|
|
#include "attributes.h"
|
|
#include "mpeg2_internal.h"
|
|
#include "alpha_asm.h"
|
|
|
|
#define W1 2841 /* 2048 * sqrt (2) * cos (1 * pi / 16) */
|
|
#define W2 2676 /* 2048 * sqrt (2) * cos (2 * pi / 16) */
|
|
#define W3 2408 /* 2048 * sqrt (2) * cos (3 * pi / 16) */
|
|
#define W5 1609 /* 2048 * sqrt (2) * cos (5 * pi / 16) */
|
|
#define W6 1108 /* 2048 * sqrt (2) * cos (6 * pi / 16) */
|
|
#define W7 565 /* 2048 * sqrt (2) * cos (7 * pi / 16) */
|
|
|
|
extern uint8_t mpeg2_clip[3840 * 2 + 256];
|
|
#define CLIP(i) ((mpeg2_clip + 3840)[i])
|
|
|
|
#if 0
|
|
#define BUTTERFLY(t0,t1,W0,W1,d0,d1) \
|
|
do { \
|
|
t0 = W0 * d0 + W1 * d1; \
|
|
t1 = W0 * d1 - W1 * d0; \
|
|
} while (0)
|
|
#else
|
|
#define BUTTERFLY(t0,t1,W0,W1,d0,d1) \
|
|
do { \
|
|
int_fast32_t tmp = W0 * (d0 + d1); \
|
|
t0 = tmp + (W1 - W0) * d1; \
|
|
t1 = tmp - (W1 + W0) * d0; \
|
|
} while (0)
|
|
#endif
|
|
|
|
static void inline idct_row (int16_t * const block)
|
|
{
|
|
uint64_t l, r;
|
|
int_fast32_t d0, d1, d2, d3;
|
|
int_fast32_t a0, a1, a2, a3, b0, b1, b2, b3;
|
|
int_fast32_t t0, t1, t2, t3;
|
|
|
|
l = ldq (block);
|
|
r = ldq (block + 4);
|
|
|
|
/* shortcut */
|
|
if (likely (!((l & ~0xffffUL) | r))) {
|
|
uint64_t tmp = (uint16_t) (l >> 1);
|
|
tmp |= tmp << 16;
|
|
tmp |= tmp << 32;
|
|
((int32_t *)block)[0] = tmp;
|
|
((int32_t *)block)[1] = tmp;
|
|
((int32_t *)block)[2] = tmp;
|
|
((int32_t *)block)[3] = tmp;
|
|
return;
|
|
}
|
|
|
|
d0 = (sextw (l) << 11) + 2048;
|
|
d1 = sextw (extwl (l, 2));
|
|
d2 = sextw (extwl (l, 4)) << 11;
|
|
d3 = sextw (extwl (l, 6));
|
|
t0 = d0 + d2;
|
|
t1 = d0 - d2;
|
|
BUTTERFLY (t2, t3, W6, W2, d3, d1);
|
|
a0 = t0 + t2;
|
|
a1 = t1 + t3;
|
|
a2 = t1 - t3;
|
|
a3 = t0 - t2;
|
|
|
|
d0 = sextw (r);
|
|
d1 = sextw (extwl (r, 2));
|
|
d2 = sextw (extwl (r, 4));
|
|
d3 = sextw (extwl (r, 6));
|
|
BUTTERFLY (t0, t1, W7, W1, d3, d0);
|
|
BUTTERFLY (t2, t3, W3, W5, d1, d2);
|
|
b0 = t0 + t2;
|
|
b3 = t1 + t3;
|
|
t0 -= t2;
|
|
t1 -= t3;
|
|
b1 = ((t0 + t1) >> 8) * 181;
|
|
b2 = ((t0 - t1) >> 8) * 181;
|
|
|
|
block[0] = (a0 + b0) >> 12;
|
|
block[1] = (a1 + b1) >> 12;
|
|
block[2] = (a2 + b2) >> 12;
|
|
block[3] = (a3 + b3) >> 12;
|
|
block[4] = (a3 - b3) >> 12;
|
|
block[5] = (a2 - b2) >> 12;
|
|
block[6] = (a1 - b1) >> 12;
|
|
block[7] = (a0 - b0) >> 12;
|
|
}
|
|
|
|
static void inline idct_col (int16_t * const block)
|
|
{
|
|
int_fast32_t d0, d1, d2, d3;
|
|
int_fast32_t a0, a1, a2, a3, b0, b1, b2, b3;
|
|
int_fast32_t t0, t1, t2, t3;
|
|
|
|
d0 = (block[8*0] << 11) + 65536;
|
|
d1 = block[8*1];
|
|
d2 = block[8*2] << 11;
|
|
d3 = block[8*3];
|
|
t0 = d0 + d2;
|
|
t1 = d0 - d2;
|
|
BUTTERFLY (t2, t3, W6, W2, d3, d1);
|
|
a0 = t0 + t2;
|
|
a1 = t1 + t3;
|
|
a2 = t1 - t3;
|
|
a3 = t0 - t2;
|
|
|
|
d0 = block[8*4];
|
|
d1 = block[8*5];
|
|
d2 = block[8*6];
|
|
d3 = block[8*7];
|
|
BUTTERFLY (t0, t1, W7, W1, d3, d0);
|
|
BUTTERFLY (t2, t3, W3, W5, d1, d2);
|
|
b0 = t0 + t2;
|
|
b3 = t1 + t3;
|
|
t0 -= t2;
|
|
t1 -= t3;
|
|
b1 = ((t0 + t1) >> 8) * 181;
|
|
b2 = ((t0 - t1) >> 8) * 181;
|
|
|
|
block[8*0] = (a0 + b0) >> 17;
|
|
block[8*1] = (a1 + b1) >> 17;
|
|
block[8*2] = (a2 + b2) >> 17;
|
|
block[8*3] = (a3 + b3) >> 17;
|
|
block[8*4] = (a3 - b3) >> 17;
|
|
block[8*5] = (a2 - b2) >> 17;
|
|
block[8*6] = (a1 - b1) >> 17;
|
|
block[8*7] = (a0 - b0) >> 17;
|
|
}
|
|
|
|
void mpeg2_idct_copy_mvi (int16_t * block, uint8_t * dest, const int stride)
|
|
{
|
|
uint64_t clampmask;
|
|
int i;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
idct_row (block + 8 * i);
|
|
|
|
for (i = 0; i < 8; i++)
|
|
idct_col (block + i);
|
|
|
|
clampmask = zap (-1, 0xaa); /* 0x00ff00ff00ff00ff */
|
|
do {
|
|
uint64_t shorts0, shorts1;
|
|
|
|
shorts0 = ldq (block);
|
|
shorts0 = maxsw4 (shorts0, 0);
|
|
shorts0 = minsw4 (shorts0, clampmask);
|
|
stl (pkwb (shorts0), dest);
|
|
|
|
shorts1 = ldq (block + 4);
|
|
shorts1 = maxsw4 (shorts1, 0);
|
|
shorts1 = minsw4 (shorts1, clampmask);
|
|
stl (pkwb (shorts1), dest + 4);
|
|
|
|
stq (0, block);
|
|
stq (0, block + 4);
|
|
|
|
dest += stride;
|
|
block += 8;
|
|
} while (--i);
|
|
}
|
|
|
|
void mpeg2_idct_add_mvi (const int last, int16_t * block,
|
|
uint8_t * dest, const int stride)
|
|
{
|
|
uint64_t clampmask;
|
|
uint64_t signmask;
|
|
int i;
|
|
|
|
if (last != 129 || (block[0] & (7 << 4)) == (4 << 4)) {
|
|
for (i = 0; i < 8; i++)
|
|
idct_row (block + 8 * i);
|
|
for (i = 0; i < 8; i++)
|
|
idct_col (block + i);
|
|
clampmask = zap (-1, 0xaa); /* 0x00ff00ff00ff00ff */
|
|
signmask = zap (-1, 0x33);
|
|
signmask ^= signmask >> 1; /* 0x8000800080008000 */
|
|
|
|
do {
|
|
uint64_t shorts0, pix0, signs0;
|
|
uint64_t shorts1, pix1, signs1;
|
|
|
|
shorts0 = ldq (block);
|
|
shorts1 = ldq (block + 4);
|
|
|
|
pix0 = unpkbw (ldl (dest));
|
|
/* signed subword add (MMX paddw). */
|
|
signs0 = shorts0 & signmask;
|
|
shorts0 &= ~signmask;
|
|
shorts0 += pix0;
|
|
shorts0 ^= signs0;
|
|
/* clamp. */
|
|
shorts0 = maxsw4 (shorts0, 0);
|
|
shorts0 = minsw4 (shorts0, clampmask);
|
|
|
|
/* next 4. */
|
|
pix1 = unpkbw (ldl (dest + 4));
|
|
signs1 = shorts1 & signmask;
|
|
shorts1 &= ~signmask;
|
|
shorts1 += pix1;
|
|
shorts1 ^= signs1;
|
|
shorts1 = maxsw4 (shorts1, 0);
|
|
shorts1 = minsw4 (shorts1, clampmask);
|
|
|
|
stl (pkwb (shorts0), dest);
|
|
stl (pkwb (shorts1), dest + 4);
|
|
stq (0, block);
|
|
stq (0, block + 4);
|
|
|
|
dest += stride;
|
|
block += 8;
|
|
} while (--i);
|
|
} else {
|
|
int DC;
|
|
uint64_t p0, p1, p2, p3, p4, p5, p6, p7;
|
|
uint64_t DCs;
|
|
|
|
DC = (block[0] + 64) >> 7;
|
|
block[0] = block[63] = 0;
|
|
|
|
p0 = ldq (dest + 0 * stride);
|
|
p1 = ldq (dest + 1 * stride);
|
|
p2 = ldq (dest + 2 * stride);
|
|
p3 = ldq (dest + 3 * stride);
|
|
p4 = ldq (dest + 4 * stride);
|
|
p5 = ldq (dest + 5 * stride);
|
|
p6 = ldq (dest + 6 * stride);
|
|
p7 = ldq (dest + 7 * stride);
|
|
|
|
if (DC > 0) {
|
|
DCs = BYTE_VEC (likely (DC <= 255) ? DC : 255);
|
|
p0 += minub8 (DCs, ~p0);
|
|
p1 += minub8 (DCs, ~p1);
|
|
p2 += minub8 (DCs, ~p2);
|
|
p3 += minub8 (DCs, ~p3);
|
|
p4 += minub8 (DCs, ~p4);
|
|
p5 += minub8 (DCs, ~p5);
|
|
p6 += minub8 (DCs, ~p6);
|
|
p7 += minub8 (DCs, ~p7);
|
|
} else {
|
|
DCs = BYTE_VEC (likely (-DC <= 255) ? -DC : 255);
|
|
p0 -= minub8 (DCs, p0);
|
|
p1 -= minub8 (DCs, p1);
|
|
p2 -= minub8 (DCs, p2);
|
|
p3 -= minub8 (DCs, p3);
|
|
p4 -= minub8 (DCs, p4);
|
|
p5 -= minub8 (DCs, p5);
|
|
p6 -= minub8 (DCs, p6);
|
|
p7 -= minub8 (DCs, p7);
|
|
}
|
|
|
|
stq (p0, dest + 0 * stride);
|
|
stq (p1, dest + 1 * stride);
|
|
stq (p2, dest + 2 * stride);
|
|
stq (p3, dest + 3 * stride);
|
|
stq (p4, dest + 4 * stride);
|
|
stq (p5, dest + 5 * stride);
|
|
stq (p6, dest + 6 * stride);
|
|
stq (p7, dest + 7 * stride);
|
|
}
|
|
}
|
|
|
|
void mpeg2_idct_copy_alpha (int16_t * block, uint8_t * dest, const int stride)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
idct_row (block + 8 * i);
|
|
for (i = 0; i < 8; i++)
|
|
idct_col (block + i);
|
|
do {
|
|
dest[0] = CLIP (block[0]);
|
|
dest[1] = CLIP (block[1]);
|
|
dest[2] = CLIP (block[2]);
|
|
dest[3] = CLIP (block[3]);
|
|
dest[4] = CLIP (block[4]);
|
|
dest[5] = CLIP (block[5]);
|
|
dest[6] = CLIP (block[6]);
|
|
dest[7] = CLIP (block[7]);
|
|
|
|
stq(0, block);
|
|
stq(0, block + 4);
|
|
|
|
dest += stride;
|
|
block += 8;
|
|
} while (--i);
|
|
}
|
|
|
|
void mpeg2_idct_add_alpha (const int last, int16_t * block,
|
|
uint8_t * dest, const int stride)
|
|
{
|
|
int i;
|
|
|
|
if (last != 129 || (block[0] & (7 << 4)) == (4 << 4)) {
|
|
for (i = 0; i < 8; i++)
|
|
idct_row (block + 8 * i);
|
|
for (i = 0; i < 8; i++)
|
|
idct_col (block + i);
|
|
do {
|
|
dest[0] = CLIP (block[0] + dest[0]);
|
|
dest[1] = CLIP (block[1] + dest[1]);
|
|
dest[2] = CLIP (block[2] + dest[2]);
|
|
dest[3] = CLIP (block[3] + dest[3]);
|
|
dest[4] = CLIP (block[4] + dest[4]);
|
|
dest[5] = CLIP (block[5] + dest[5]);
|
|
dest[6] = CLIP (block[6] + dest[6]);
|
|
dest[7] = CLIP (block[7] + dest[7]);
|
|
|
|
stq(0, block);
|
|
stq(0, block + 4);
|
|
|
|
dest += stride;
|
|
block += 8;
|
|
} while (--i);
|
|
} else {
|
|
int DC;
|
|
|
|
DC = (block[0] + 64) >> 7;
|
|
block[0] = block[63] = 0;
|
|
i = 8;
|
|
do {
|
|
dest[0] = CLIP (DC + dest[0]);
|
|
dest[1] = CLIP (DC + dest[1]);
|
|
dest[2] = CLIP (DC + dest[2]);
|
|
dest[3] = CLIP (DC + dest[3]);
|
|
dest[4] = CLIP (DC + dest[4]);
|
|
dest[5] = CLIP (DC + dest[5]);
|
|
dest[6] = CLIP (DC + dest[6]);
|
|
dest[7] = CLIP (DC + dest[7]);
|
|
dest += stride;
|
|
} while (--i);
|
|
}
|
|
}
|
|
|
|
void mpeg2_idct_alpha_init (void)
|
|
{
|
|
extern uint8_t mpeg2_scan_norm[64];
|
|
extern uint8_t mpeg2_scan_alt[64];
|
|
int i, j;
|
|
|
|
for (i = 0; i < 64; i++) {
|
|
j = mpeg2_scan_norm[i];
|
|
mpeg2_scan_norm[i] = ((j & 0x36) >> 1) | ((j & 0x09) << 2);
|
|
j = mpeg2_scan_alt[i];
|
|
mpeg2_scan_alt[i] = ((j & 0x36) >> 1) | ((j & 0x09) << 2);
|
|
}
|
|
}
|
|
|
|
#endif /* ARCH_ALPHA */
|