mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
d8fccf4d46
AltiVec code needs -maltivec to compile, but then AltiVec instructions appear in other places of the code causing MPlayer to sigill. Somehow upstream libmpeg2 manages not to sigill under what appear to be the same circumstances. Enlightenment welcome. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26657 b3059339-0415-0410-9bf9-f77b7e298cf2
296 lines
8.0 KiB
C
296 lines
8.0 KiB
C
/*
|
|
* idct.c
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Modified for use with MPlayer, see libmpeg-0.4.1.diff for the exact changes.
|
|
* detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/
|
|
* $Id$
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <inttypes.h>
|
|
|
|
#include "mpeg2.h"
|
|
#include "attributes.h"
|
|
#include "mpeg2_internal.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) */
|
|
|
|
/* idct main entry point */
|
|
void (* mpeg2_idct_copy) (int16_t * block, uint8_t * dest, int stride);
|
|
void (* mpeg2_idct_add) (int last, int16_t * block,
|
|
uint8_t * dest, int stride);
|
|
|
|
/*
|
|
* In legal streams, the IDCT output should be between -384 and +384.
|
|
* In corrupted streams, it is possible to force the IDCT output to go
|
|
* to +-3826 - this is the worst case for a column IDCT where the
|
|
* column inputs are 16-bit values.
|
|
*/
|
|
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 tmp = W0 * (d0 + d1); \
|
|
t0 = tmp + (W1 - W0) * d1; \
|
|
t1 = tmp - (W1 + W0) * d0; \
|
|
} while (0)
|
|
#endif
|
|
|
|
static inline void idct_row (int16_t * const block)
|
|
{
|
|
int d0, d1, d2, d3;
|
|
int a0, a1, a2, a3, b0, b1, b2, b3;
|
|
int t0, t1, t2, t3;
|
|
|
|
/* shortcut */
|
|
if (likely (!(block[1] | ((int32_t *)block)[1] | ((int32_t *)block)[2] |
|
|
((int32_t *)block)[3]))) {
|
|
uint32_t tmp = (uint16_t) (block[0] >> 1);
|
|
tmp |= tmp << 16;
|
|
((int32_t *)block)[0] = tmp;
|
|
((int32_t *)block)[1] = tmp;
|
|
((int32_t *)block)[2] = tmp;
|
|
((int32_t *)block)[3] = tmp;
|
|
return;
|
|
}
|
|
|
|
d0 = (block[0] << 11) + 2048;
|
|
d1 = block[1];
|
|
d2 = block[2] << 11;
|
|
d3 = block[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[4];
|
|
d1 = block[5];
|
|
d2 = block[6];
|
|
d3 = block[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[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 inline void idct_col (int16_t * const block)
|
|
{
|
|
int d0, d1, d2, d3;
|
|
int a0, a1, a2, a3, b0, b1, b2, b3;
|
|
int 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;
|
|
}
|
|
|
|
static void mpeg2_idct_copy_c (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]);
|
|
|
|
((int32_t *)block)[0] = 0; ((int32_t *)block)[1] = 0;
|
|
((int32_t *)block)[2] = 0; ((int32_t *)block)[3] = 0;
|
|
|
|
dest += stride;
|
|
block += 8;
|
|
} while (--i);
|
|
}
|
|
|
|
static void mpeg2_idct_add_c (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]);
|
|
|
|
((int32_t *)block)[0] = 0; ((int32_t *)block)[1] = 0;
|
|
((int32_t *)block)[2] = 0; ((int32_t *)block)[3] = 0;
|
|
|
|
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_init (uint32_t accel)
|
|
{
|
|
#ifdef ARCH_X86
|
|
if (accel & MPEG2_ACCEL_X86_SSE2) {
|
|
mpeg2_idct_copy = mpeg2_idct_copy_sse2;
|
|
mpeg2_idct_add = mpeg2_idct_add_sse2;
|
|
mpeg2_idct_mmx_init ();
|
|
} else if (accel & MPEG2_ACCEL_X86_MMXEXT) {
|
|
mpeg2_idct_copy = mpeg2_idct_copy_mmxext;
|
|
mpeg2_idct_add = mpeg2_idct_add_mmxext;
|
|
mpeg2_idct_mmx_init ();
|
|
} else if (accel & MPEG2_ACCEL_X86_MMX) {
|
|
mpeg2_idct_copy = mpeg2_idct_copy_mmx;
|
|
mpeg2_idct_add = mpeg2_idct_add_mmx;
|
|
mpeg2_idct_mmx_init ();
|
|
} else
|
|
#endif
|
|
#ifdef HAVE_ALTIVEC
|
|
if (accel & MPEG2_ACCEL_PPC_ALTIVEC) {
|
|
mpeg2_idct_copy = mpeg2_idct_copy_altivec;
|
|
mpeg2_idct_add = mpeg2_idct_add_altivec;
|
|
mpeg2_idct_altivec_init ();
|
|
} else
|
|
#endif
|
|
#ifdef ARCH_ALPHA
|
|
if (accel & MPEG2_ACCEL_ALPHA_MVI) {
|
|
mpeg2_idct_copy = mpeg2_idct_copy_mvi;
|
|
mpeg2_idct_add = mpeg2_idct_add_mvi;
|
|
mpeg2_idct_alpha_init ();
|
|
} else if (accel & MPEG2_ACCEL_ALPHA) {
|
|
int i;
|
|
|
|
mpeg2_idct_copy = mpeg2_idct_copy_alpha;
|
|
mpeg2_idct_add = mpeg2_idct_add_alpha;
|
|
mpeg2_idct_alpha_init ();
|
|
for (i = -3840; i < 3840 + 256; i++)
|
|
CLIP(i) = (i < 0) ? 0 : ((i > 255) ? 255 : i);
|
|
} else
|
|
#endif
|
|
{
|
|
extern uint8_t mpeg2_scan_norm[64];
|
|
extern uint8_t mpeg2_scan_alt[64];
|
|
int i, j;
|
|
|
|
mpeg2_idct_copy = mpeg2_idct_copy_c;
|
|
mpeg2_idct_add = mpeg2_idct_add_c;
|
|
for (i = -3840; i < 3840 + 256; i++)
|
|
CLIP(i) = (i < 0) ? 0 : ((i > 255) ? 255 : i);
|
|
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);
|
|
}
|
|
}
|
|
}
|