rendered paste body/* * 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 */#include "plugin.h"#include "mpeg2dec_config.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) */#define SC(x) #x#define WA 1448 //=cos(pi/4) 2048*cos(4pi/16) 0,707106781#define WB 2009 //=cos(pi/16) 2048*cos(pi/16) 0,98078528 #define WC 1892 //=cos(pi/8) 2048*cos(2pi/16) 0,923879533#define WD 1703 //=cos(3pi/16) 2048*cos(3pi/16) 0,831469612#define WE 1448 //=sin(pi/4) 2048*sin(4pi/16) 0,707106781#define WF 1138 //=sin(3pi/16) 2048*sin(3pi/16) 0,555570233#define WG 784 //=sin(pi/8) 2048*sin(2pi/16) 0,382683432#define WH 400 //=sin(pi/16) 2048*sin(pi/16) 0,195090322/* the two matrix *//* static const int mat_coef_1[] ICONST_ATTR = {WA, WC, WE, WG, WA, WG, -WE, -WC, WA, -WG, -WE, WC, WA, -WC, WE, -WG};static const int mat_coef_2[] ICONST_ATTR = {WB, WD, WF, WH, WD, -WH, -WB, -WF, WF, -WB, WH, WD, WH, -WF, WD, -WB};*//* optimised for incrementation *//*static const int mat_coef[] ICONST_ATTR = {WA, WC, WE, WG, WB, WD, WF, WH, WA, WG, -WE, -WC, WD, -WH, -WB, -WF, WA, -WG, -WE, WC, WF, -WB, WH, WD, WA, -WC, WE, -WG, WH, -WF, WD, -WB};*//* takes more space but optimised for incrementation static const int16_t mat_coef[] ICONST_ATTR = {WA, WC, WE, WG, WB, WD, WF, WH, WA, WC, WE, WG, WB, WD, WF, WH, WA, WG, -WE, -WC, WD, -WH, -WB, -WF, WA, WG, -WE, -WC, WD, -WH, -WB, -WF, WA, -WG, -WE, WC, WF, -WB, WH, WD, WA, -WG, -WE, WC, WF, -WB, WH, WD, WA, -WC, WE, -WG, WH, -WF, WD, -WB, WA, -WC, WE, -WG, WH, -WF, WD, -WB};*//* consecutive */ static const int mat_coef[] ICONST_ATTR = {WA, WC, WE, WG, WA, WG, -WE, -WC, WA, -WG, -WE, WC, WA, -WC, WE, -WG, WB, WD, WF, WH, WD, -WH, -WB, -WF, WF, -WB, WH, WD, WH, -WF, WD, -WB};/* 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. */#ifdef CPU_COLDFIREstatic inline unsigned CLIP(int value){ asm ( /* Note: Uses knowledge that only the low byte of the result is used */ "cmp.l #255,%[v] \n" /* overflow? */ "bls.b 1f \n" /* no: return value */ "spl.b %[v] \n" /* yes: set low byte to appropriate boundary */ "1: \n" : /* outputs */ [v]"+d"(value) ); return value;}#elif defined CPU_ARMstatic inline unsigned CLIP(int value){ asm ( /* Note: Uses knowledge that only the low byte of the result is used */ "cmp %[v], #255 \n" "mvnhi %[v], %[v], asr #31 \n" : /* outputs */ [v]"+r"(value) ); return value;}#elseuint8_t mpeg2_clip[3840 * 2 + 256] IBSS_ATTR;#define CLIP(i) ((mpeg2_clip + 3840)[i])#endif#ifdef CPU_COLDFIRE#define BUTTERFLY(t0,t1,W0,W1,d0,d1) \ asm( \ "move.l #"SC(W0)", %%d0 \n\t" \ "move.l #"SC(W1)", %%d1 \n\t" \ "move.l #0xFFFFFF80,%%macsr \n\t" \ "mac.l %%d0, %[e], %%acc0 \n\t" \ "mac.l %%d1, %[f], %%acc0 \n\t" \ "movclr.l %%acc0, %[a] \n\t" \ "mac.l %%d0, %[f], %%acc0 \n\t" \ "msac.l %%d1, %[e], %%acc0 \n\t" \ "movclr.l %%acc0, %[b] \n\t" \ : [a]"+d"(t0),[b]"+d"(t1) \ : [e]"d"(d0),[f]"d"(d1) \ : "%d0","%d1" \ )#define BUTTERFLY_OK(t0,t1,W0,W1,d0,d1) \ asm( \ "move.l #"SC(W0)", %%d0 \n\t" \ "move.l #"SC(W1)", %%d1 \n\t" \ "move.l %[e], %%d2 \n\t" \ "mulu.l %%d0, %%d2 \n\t" \ "move.l %[f], %[a] \n\t" \ "mulu.l %%d1, %[a] \n\t" \ "add.l %%d2,%[a] \n\t" \ "move.l %[e], %%d2 \n\t" \ "mulu.l %%d1, %%d2 \n\t" \ "move.l %[f], %[b] \n\t" \ "mulu.l %%d0, %[b] \n\t" \ "sub.l %%d2,%[b] \n\t" \ : [a]"+d"(t0),[b]"+d"(t1) \ : [e]"d"(d0),[f]"d"(d1) \ : "%d0","%d1","%d2" \ )#define BUTTERFLY__(t0,t1,W0,W1,d0,d1) \ asm( \ "move.l #"SC(W0)", %%d0 \n\t" \ "move.l #"SC(W1)", %%d1 \n\t" \ "move.l #0xFFFFFF80,%%macsr \n\t" \ "mac.l %%d0, %[e], %%acc0 \n\t" \ "mac.l %%d1, %[f], %%acc0 \n\t" \ "movclr.l %%acc0, %[a] \n\t" \ "mac.l %%d0, %[f], %%acc0 \n\t" \ "msac.l %%d1, %[e], %%acc0 \n\t" \ "movclr.l %%acc0, %[b] \n\t" \ : [a]"+d"(t0),[b]"+d"(t1) \ : [e]"d"(d0),[f]"d"(d1) \ : "%d0","%d1" \ )#else#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#endif#ifdef CPU_COLDFIREstatic inline void idct_row (int16_t * const block){ asm volatile( "move.l #0xFFFFFF80,%%macsr \n\t" /* load the row */ "move.l (%[block]), %%d0 \n\t" "move.l (1,%[block]), %%d1 \n\t" "move.l (2,%[block]), %%d2 \n\t" "move.l (3,%[block]), %%d3 \n\t" /* matrix start */ "move.l %[mat_coef], %%a0 \n\t" "move.l (%%a0), %%a1 \n\t" "lea.l (1,%%a0), %%a0 \n\t" /* clear the accs */ "move.l #0,%%acc0 \n\t" "move.l #0,%%acc1 \n\t" "move.l #0,%%acc2 \n\t" "move.l #0,%%acc3 \n\t" /* compute second matrix * P[1],P[3],P[5],P[7]*/ "mac.w %%d0l, %%a1u, %%acc0 \n\t" "mac.w %%d1l, %%a1l, (%%a0)+, %%a1, %%acc0 \n\t" "mac.w %%d2l, %%a1u, %%acc0 \n\t" "mac.w %%d3l, %%a1l, (%%a0)+, %%a1, %%acc0 \n\t" "mac.w %%d0l, %%a1u, %%acc1 \n\t" "mac.w %%d1l, %%a1l, (%%a0)+, %%a1, %%acc1 \n\t" "mac.w %%d2l, %%a1u, %%acc1 \n\t" "mac.w %%d3l, %%a1l, (%%a0)+, %%a1, %%acc1 \n\t" "mac.w %%d0l, %%a1u, %%acc2 \n\t" "mac.w %%d1l, %%a1l, (%%a0)+, %%a1,%%acc2 \n\t" "mac.w %%d2l, %%a1u, %%acc2 \n\t" "mac.w %%d3l, %%a1l, (%%a0)+, %%a1, %%acc2 \n\t" "mac.w %%d0l, %%a1u, %%acc3 \n\t" "mac.w %%d1l, %%a1l, (%%a0)+, %%a1,%%acc3 \n\t" "mac.w %%d2l, %%a1u, %%acc3 \n\t" "mac.w %%d3l, %%a1l, (%%a0)+, %%a1, %%acc3 \n\t" /* save second matrix row */ "movclr.l %%acc0, %%d4 \n\t" "movclr.l %%acc1, %%d5 \n\t" "movclr.l %%acc2, %%d6 \n\t" "movclr.l %%acc3, %%d7 \n\t" /* compute first matrix * P[0],P[2],P[4],P[6]*/ "mac.w %%d0u, %%a1u, %%acc0 \n\t" "mac.w %%d1u, %%a1l, (%%a0)+, %%a1,%%acc0 \n\t" "mac.w %%d2u, %%a1u, %%acc0 \n\t" "mac.w %%d3u, %%a1l, (%%a0)+, %%a1,%%acc0 \n\t" "mac.w %%d0u, %%a1u, %%acc1 \n\t" "mac.w %%d1u, %%a1l,(%%a0)+, %%a1, %%acc1 \n\t" "mac.w %%d2u, %%a1u, %%acc1 \n\t" "mac.w %%d3u, %%a1l,(%%a0)+, %%a1, %%acc1 \n\t" "mac.w %%d0u, %%a1u, %%acc2 \n\t" "mac.w %%d1u, %%a1l, (%%a0)+, %%a1,%%acc2 \n\t" "mac.w %%d2u, %%a1u, %%acc2 \n\t" "mac.w %%d3u, %%a1l,(%%a0)+, %%a1, %%acc2 \n\t" "mac.w %%d0u, %%a1u, %%acc3 \n\t" "mac.w %%d1u, %%a1l, (%%a0)+, %%a1, %%acc3 \n\t" "mac.w %%d2u, %%a1u, %%acc3 \n\t" "mac.w %%d3u, %%a1l, (%%a0)+, %%a1, %%acc3 \n\t" /* right shift value */ "movq.l #11, %%d1 \n\t" /* mat 1 + mat 2 */ "move.l %%acc0, %%d0 \n\t" "add.l %%d4,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(%[block]) \n\t" "move.l %%acc1, %%d0 \n\t" "add.l %%d5,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(2,%[block]) \n\t" "move.l %%acc2, %%d0 \n\t" "add.l %%d6,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(4,%[block]) \n\t" "move.l %%acc1, %%d0 \n\t" "add.l %%d7,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(6,%[block]) \n\t" /* mat 1 - mat2*/ "movclr.l %%acc0, %%d0 \n\t" "sub.l %%d4,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(1,%[block]) \n\t" "movclr.l %%acc1, %%d0 \n\t" "sub.l %%d5,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(3,%[block]) \n\t" "movclr.l %%acc2, %%d0 \n\t" "sub.l %%d6,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(5,%[block]) \n\t" "movclr.l %%acc1, %%d0 \n\t" "sub.l %%d7,%%d0 \n\t" "asr.l %%d1, %%d0 \n\t" "move.w %%d0,(7,%[block]) \n\t" : : [mat_coef]"a"(mat_coef),[block]"a"(block) : "%a0","%a1","%d0","%d1","%d2","%d3","%d4","%d5","%d6","%d7" ); }#elsestatic 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;}#endifstatic 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){ (void)accel;#ifdef ARCH_X86 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 ARCH_PPC 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;#if !defined(CPU_COLDFIRE) && !defined(CPU_ARM) for (i = -3840; i < 3840 + 256; i++) CLIP(i) = (i < 0) ? 0 : ((i > 255) ? 255 : i);#endif 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); } }}