/* * idct_alpha.c * Copyright (C) 2002-2003 Falk Hueffner * Copyright (C) 2000-2003 Michel Lespinasse * Copyright (C) 1999-2000 Aaron Holtzman * * 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" #ifdef ARCH_ALPHA #include #include #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 inline void 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 inline void 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 */