mirror of
https://github.com/mpv-player/mpv
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134008a534
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9858 b3059339-0415-0410-9bf9-f77b7e298cf2
381 lines
9.3 KiB
C
381 lines
9.3 KiB
C
/*
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* idct_alpha.c
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* Copyright (C) 2002 Falk Hueffner <falk@debian.org>
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* Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
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* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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*
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* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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* See http://libmpeg2.sourceforge.net/ for updates.
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*
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* mpeg2dec is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpeg2dec is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#ifdef ARCH_ALPHA
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#include <stdlib.h>
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#include <inttypes.h>
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#include "alpha_asm.h"
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#include "attributes.h"
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#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */
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#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */
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#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */
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#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */
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#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */
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#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */
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static uint8_t clip_lut[1024];
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#define CLIP(i) ((clip_lut+384)[(i)])
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#if 0
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#define BUTTERFLY(t0,t1,W0,W1,d0,d1) \
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do { \
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t0 = W0*d0 + W1*d1; \
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t1 = W0*d1 - W1*d0; \
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} while (0)
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#else
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#define BUTTERFLY(t0,t1,W0,W1,d0,d1) \
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do { \
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int_fast32_t tmp = W0 * (d0 + d1); \
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t0 = tmp + (W1 - W0) * d1; \
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t1 = tmp - (W1 + W0) * d0; \
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} while (0)
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#endif
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static void inline idct_row (int16_t * const block)
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{
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uint64_t l, r;
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int_fast32_t d0, d1, d2, d3;
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int_fast32_t a0, a1, a2, a3, b0, b1, b2, b3;
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int_fast32_t t0, t1, t2, t3;
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l = ldq (block);
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r = ldq (block + 4);
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/* shortcut */
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if (likely (!((l & ~0xffffUL) | r))) {
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uint64_t tmp = (uint16_t) (l << 3);
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tmp |= tmp << 16;
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tmp |= tmp << 32;
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((int32_t *)block)[0] = tmp;
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((int32_t *)block)[1] = tmp;
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((int32_t *)block)[2] = tmp;
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((int32_t *)block)[3] = tmp;
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return;
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}
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d0 = (sextw (l) << 11) + 128;
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d1 = sextw (extwl (l, 2));
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d2 = sextw (extwl (l, 4)) << 11;
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d3 = sextw (extwl (l, 6));
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t0 = d0 + d2;
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t1 = d0 - d2;
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BUTTERFLY (t2, t3, W6, W2, d3, d1);
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a0 = t0 + t2;
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a1 = t1 + t3;
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a2 = t1 - t3;
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a3 = t0 - t2;
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d0 = sextw (r);
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d1 = sextw (extwl (r, 2));
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d2 = sextw (extwl (r, 4));
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d3 = sextw (extwl (r, 6));
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BUTTERFLY (t0, t1, W7, W1, d3, d0);
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BUTTERFLY (t2, t3, W3, W5, d1, d2);
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b0 = t0 + t2;
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b3 = t1 + t3;
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t0 -= t2;
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t1 -= t3;
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b1 = ((t0 + t1) * 181) >> 8;
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b2 = ((t0 - t1) * 181) >> 8;
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block[0] = (a0 + b0) >> 8;
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block[1] = (a1 + b1) >> 8;
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block[2] = (a2 + b2) >> 8;
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block[3] = (a3 + b3) >> 8;
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block[4] = (a3 - b3) >> 8;
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block[5] = (a2 - b2) >> 8;
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block[6] = (a1 - b1) >> 8;
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block[7] = (a0 - b0) >> 8;
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}
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static void inline idct_col (int16_t * const block)
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{
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int_fast32_t d0, d1, d2, d3;
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int_fast32_t a0, a1, a2, a3, b0, b1, b2, b3;
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int_fast32_t t0, t1, t2, t3;
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d0 = (block[8*0] << 11) + 65536;
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d1 = block[8*1];
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d2 = block[8*2] << 11;
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d3 = block[8*3];
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t0 = d0 + d2;
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t1 = d0 - d2;
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BUTTERFLY (t2, t3, W6, W2, d3, d1);
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a0 = t0 + t2;
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a1 = t1 + t3;
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a2 = t1 - t3;
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a3 = t0 - t2;
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d0 = block[8*4];
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d1 = block[8*5];
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d2 = block[8*6];
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d3 = block[8*7];
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BUTTERFLY (t0, t1, W7, W1, d3, d0);
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BUTTERFLY (t2, t3, W3, W5, d1, d2);
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b0 = t0 + t2;
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b3 = t1 + t3;
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t0 = (t0 - t2) >> 8;
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t1 = (t1 - t3) >> 8;
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b1 = (t0 + t1) * 181;
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b2 = (t0 - t1) * 181;
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block[8*0] = (a0 + b0) >> 17;
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block[8*1] = (a1 + b1) >> 17;
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block[8*2] = (a2 + b2) >> 17;
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block[8*3] = (a3 + b3) >> 17;
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block[8*4] = (a3 - b3) >> 17;
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block[8*5] = (a2 - b2) >> 17;
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block[8*6] = (a1 - b1) >> 17;
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block[8*7] = (a0 - b0) >> 17;
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}
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void mpeg2_idct_copy_mvi (int16_t * block, uint8_t * dest, const int stride)
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{
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uint64_t clampmask;
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int i;
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for (i = 0; i < 8; i++)
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idct_row (block + 8 * i);
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for (i = 0; i < 8; i++)
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idct_col (block + i);
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clampmask = zap (-1, 0xaa); /* 0x00ff00ff00ff00ff */
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do {
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uint64_t shorts0, shorts1;
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shorts0 = ldq (block);
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shorts0 = maxsw4 (shorts0, 0);
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shorts0 = minsw4 (shorts0, clampmask);
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stl (pkwb (shorts0), dest);
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shorts1 = ldq (block + 4);
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shorts1 = maxsw4 (shorts1, 0);
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shorts1 = minsw4 (shorts1, clampmask);
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stl (pkwb (shorts1), dest + 4);
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stq (0, block);
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stq (0, block + 4);
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dest += stride;
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block += 8;
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} while (--i);
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}
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void mpeg2_idct_add_mvi (const int last, int16_t * block,
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uint8_t * dest, const int stride)
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{
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uint64_t clampmask;
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uint64_t signmask;
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int i;
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if (last != 129 || (block[0] & 7) == 4) {
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for (i = 0; i < 8; i++)
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idct_row (block + 8 * i);
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for (i = 0; i < 8; i++)
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idct_col (block + i);
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clampmask = zap (-1, 0xaa); /* 0x00ff00ff00ff00ff */
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signmask = zap (-1, 0x33);
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signmask ^= signmask >> 1; /* 0x8000800080008000 */
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do {
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uint64_t shorts0, pix0, signs0;
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uint64_t shorts1, pix1, signs1;
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shorts0 = ldq (block);
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shorts1 = ldq (block + 4);
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pix0 = unpkbw (ldl (dest));
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/* signed subword add (MMX paddw). */
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signs0 = shorts0 & signmask;
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shorts0 &= ~signmask;
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shorts0 += pix0;
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shorts0 ^= signs0;
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/* clamp. */
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shorts0 = maxsw4 (shorts0, 0);
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shorts0 = minsw4 (shorts0, clampmask);
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/* next 4. */
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pix1 = unpkbw (ldl (dest + 4));
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signs1 = shorts1 & signmask;
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shorts1 &= ~signmask;
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shorts1 += pix1;
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shorts1 ^= signs1;
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shorts1 = maxsw4 (shorts1, 0);
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shorts1 = minsw4 (shorts1, clampmask);
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stl (pkwb (shorts0), dest);
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stl (pkwb (shorts1), dest + 4);
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stq (0, block);
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stq (0, block + 4);
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dest += stride;
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block += 8;
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} while (--i);
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} else {
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int DC;
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uint64_t p0, p1, p2, p3, p4, p5, p6, p7;
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uint64_t DCs;
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DC = (block[0] + 4) >> 3;
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block[0] = block[63] = 0;
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p0 = ldq (dest + 0 * stride);
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p1 = ldq (dest + 1 * stride);
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p2 = ldq (dest + 2 * stride);
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p3 = ldq (dest + 3 * stride);
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p4 = ldq (dest + 4 * stride);
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p5 = ldq (dest + 5 * stride);
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p6 = ldq (dest + 6 * stride);
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p7 = ldq (dest + 7 * stride);
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if (DC > 0) {
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DCs = BYTE_VEC (likely (DC <= 255) ? DC : 255);
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p0 += minub8 (DCs, ~p0);
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p1 += minub8 (DCs, ~p1);
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p2 += minub8 (DCs, ~p2);
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p3 += minub8 (DCs, ~p3);
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p4 += minub8 (DCs, ~p4);
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p5 += minub8 (DCs, ~p5);
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p6 += minub8 (DCs, ~p6);
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p7 += minub8 (DCs, ~p7);
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} else {
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DCs = BYTE_VEC (likely (-DC <= 255) ? -DC : 255);
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p0 -= minub8 (DCs, p0);
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p1 -= minub8 (DCs, p1);
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p2 -= minub8 (DCs, p2);
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p3 -= minub8 (DCs, p3);
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p4 -= minub8 (DCs, p4);
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p5 -= minub8 (DCs, p5);
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p6 -= minub8 (DCs, p6);
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p7 -= minub8 (DCs, p7);
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}
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stq (p0, dest + 0 * stride);
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stq (p1, dest + 1 * stride);
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stq (p2, dest + 2 * stride);
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stq (p3, dest + 3 * stride);
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stq (p4, dest + 4 * stride);
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stq (p5, dest + 5 * stride);
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stq (p6, dest + 6 * stride);
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stq (p7, dest + 7 * stride);
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}
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}
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void mpeg2_idct_copy_alpha (int16_t * block, uint8_t * dest, const int stride)
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{
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int i;
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for (i = 0; i < 8; i++)
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idct_row (block + 8 * i);
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for (i = 0; i < 8; i++)
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idct_col (block + i);
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do {
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dest[0] = CLIP (block[0]);
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dest[1] = CLIP (block[1]);
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dest[2] = CLIP (block[2]);
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dest[3] = CLIP (block[3]);
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dest[4] = CLIP (block[4]);
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dest[5] = CLIP (block[5]);
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dest[6] = CLIP (block[6]);
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dest[7] = CLIP (block[7]);
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stq(0, block);
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stq(0, block + 4);
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dest += stride;
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block += 8;
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} while (--i);
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}
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void mpeg2_idct_add_alpha (const int last, int16_t * block,
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uint8_t * dest, const int stride)
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{
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int i;
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if (last != 129 || (block[0] & 7) == 4) {
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for (i = 0; i < 8; i++)
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idct_row (block + 8 * i);
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for (i = 0; i < 8; i++)
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idct_col (block + i);
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do {
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dest[0] = CLIP (block[0] + dest[0]);
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dest[1] = CLIP (block[1] + dest[1]);
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dest[2] = CLIP (block[2] + dest[2]);
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dest[3] = CLIP (block[3] + dest[3]);
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dest[4] = CLIP (block[4] + dest[4]);
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dest[5] = CLIP (block[5] + dest[5]);
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dest[6] = CLIP (block[6] + dest[6]);
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dest[7] = CLIP (block[7] + dest[7]);
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stq(0, block);
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stq(0, block + 4);
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dest += stride;
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block += 8;
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} while (--i);
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} else {
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int DC;
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DC = (block[0] + 4) >> 3;
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block[0] = block[63] = 0;
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i = 8;
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do {
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dest[0] = CLIP (DC + dest[0]);
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dest[1] = CLIP (DC + dest[1]);
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dest[2] = CLIP (DC + dest[2]);
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dest[3] = CLIP (DC + dest[3]);
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dest[4] = CLIP (DC + dest[4]);
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dest[5] = CLIP (DC + dest[5]);
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dest[6] = CLIP (DC + dest[6]);
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dest[7] = CLIP (DC + dest[7]);
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dest += stride;
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} while (--i);
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}
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}
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void mpeg2_idct_alpha_init(int no_mvi)
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{
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extern uint8_t mpeg2_scan_norm[64];
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extern uint8_t mpeg2_scan_alt[64];
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int i, j;
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if (no_mvi)
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for (i = -384; i < 640; i++)
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clip_lut[i + 384] = (i < 0) ? 0 : ((i > 255) ? 255 : i);
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for (i = 0; i < 64; i++) {
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j = mpeg2_scan_norm[i];
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mpeg2_scan_norm[i] = ((j & 0x36) >> 1) | ((j & 0x09) << 2);
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j = mpeg2_scan_alt[i];
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mpeg2_scan_alt[i] = ((j & 0x36) >> 1) | ((j & 0x09) << 2);
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}
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}
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#endif /* ARCH_ALPHA */
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