mirror of https://github.com/PCSX2/pcsx2.git
422 lines
9.5 KiB
C++
422 lines
9.5 KiB
C++
/* Pcsx2 - Pc Ps2 Emulator
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* Copyright (C) 2002-2008 Pcsx2 Team
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*
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* This program 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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* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/* This code was based on the FPSE v0.08 Mdec decoder*/
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#if 0
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#include <stdio.h>
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#include <string.h>
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#include "IopCommon.h"
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#include "Mdec.h"
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int iq_y[DCTSIZE2],iq_uv[DCTSIZE2];
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static void idct1(int *block)
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{
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int i, val;
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val = RANGE(DESCALE(block[0], PASS1_BITS+3));
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for(i=0;i<DCTSIZE2;i++)
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block[i]=val;
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}
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void idct(int *block,int k)
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{
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int tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
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int z5, z10, z11, z12, z13;
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int *ptr;
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int i;
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if (!k) { idct1(block); return; }
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ptr = block;
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for (i = 0; i< DCTSIZE; i++,ptr++) {
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if ((ptr[DCTSIZE*1] | ptr[DCTSIZE*2] | ptr[DCTSIZE*3] |
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ptr[DCTSIZE*4] | ptr[DCTSIZE*5] | ptr[DCTSIZE*6] |
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ptr[DCTSIZE*7]) == 0) {
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ptr[DCTSIZE*0] =
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ptr[DCTSIZE*1] =
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ptr[DCTSIZE*2] =
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ptr[DCTSIZE*3] =
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ptr[DCTSIZE*4] =
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ptr[DCTSIZE*5] =
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ptr[DCTSIZE*6] =
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ptr[DCTSIZE*7] =
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ptr[DCTSIZE*0];
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continue;
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}
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z10 = ptr[DCTSIZE*0] + ptr[DCTSIZE*4];
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z11 = ptr[DCTSIZE*0] - ptr[DCTSIZE*4];
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z13 = ptr[DCTSIZE*2] + ptr[DCTSIZE*6];
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z12 = MULTIPLY(ptr[DCTSIZE*2] - ptr[DCTSIZE*6], FIX_1_414213562) - z13;
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tmp0 = z10 + z13;
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tmp3 = z10 - z13;
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tmp1 = z11 + z12;
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tmp2 = z11 - z12;
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z13 = ptr[DCTSIZE*3] + ptr[DCTSIZE*5];
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z10 = ptr[DCTSIZE*3] - ptr[DCTSIZE*5];
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z11 = ptr[DCTSIZE*1] + ptr[DCTSIZE*7];
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z12 = ptr[DCTSIZE*1] - ptr[DCTSIZE*7];
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z5 = MULTIPLY(z12 - z10, FIX_1_847759065);
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tmp7 = z11 + z13;
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tmp6 = MULTIPLY(z10, FIX_2_613125930) + z5 - tmp7;
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tmp5 = MULTIPLY(z11 - z13, FIX_1_414213562) - tmp6;
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tmp4 = MULTIPLY(z12, FIX_1_082392200) - z5 + tmp5;
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ptr[DCTSIZE*0] = (tmp0 + tmp7);
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ptr[DCTSIZE*7] = (tmp0 - tmp7);
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ptr[DCTSIZE*1] = (tmp1 + tmp6);
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ptr[DCTSIZE*6] = (tmp1 - tmp6);
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ptr[DCTSIZE*2] = (tmp2 + tmp5);
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ptr[DCTSIZE*5] = (tmp2 - tmp5);
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ptr[DCTSIZE*4] = (tmp3 + tmp4);
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ptr[DCTSIZE*3] = (tmp3 - tmp4);
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}
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ptr = block;
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for (i = 0; i < DCTSIZE; i++ ,ptr+=DCTSIZE) {
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if ((ptr[1] | ptr[2] | ptr[3] | ptr[4] | ptr[5] | ptr[6] |
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ptr[7]) == 0) {
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ptr[0] =
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ptr[1] =
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ptr[2] =
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ptr[3] =
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ptr[4] =
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ptr[5] =
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ptr[6] =
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ptr[7] =
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RANGE(DESCALE(ptr[0], PASS1_BITS+3));;
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continue;
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}
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z10 = ptr[0] + ptr[4];
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z11 = ptr[0] - ptr[4];
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z13 = ptr[2] + ptr[6];
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z12 = MULTIPLY(ptr[2] - ptr[6], FIX_1_414213562) - z13;
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tmp0 = z10 + z13;
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tmp3 = z10 - z13;
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tmp1 = z11 + z12;
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tmp2 = z11 - z12;
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z13 = ptr[3] + ptr[5];
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z10 = ptr[3] - ptr[5];
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z11 = ptr[1] + ptr[7];
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z12 = ptr[1] - ptr[7];
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z5 = MULTIPLY(z12 - z10, FIX_1_847759065);
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tmp7 = z11 + z13;
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tmp6 = MULTIPLY(z10, FIX_2_613125930) + z5 - tmp7;
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tmp5 = MULTIPLY(z11 - z13, FIX_1_414213562) - tmp6;
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tmp4 = MULTIPLY(z12, FIX_1_082392200) - z5 + tmp5;
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ptr[0] = RANGE(DESCALE(tmp0 + tmp7, PASS1_BITS+3));;
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ptr[7] = RANGE(DESCALE(tmp0 - tmp7, PASS1_BITS+3));;
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ptr[1] = RANGE(DESCALE(tmp1 + tmp6, PASS1_BITS+3));;
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ptr[6] = RANGE(DESCALE(tmp1 - tmp6, PASS1_BITS+3));;
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ptr[2] = RANGE(DESCALE(tmp2 + tmp5, PASS1_BITS+3));;
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ptr[5] = RANGE(DESCALE(tmp2 - tmp5, PASS1_BITS+3));;
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ptr[4] = RANGE(DESCALE(tmp3 + tmp4, PASS1_BITS+3));;
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ptr[3] = RANGE(DESCALE(tmp3 - tmp4, PASS1_BITS+3));;
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}
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}
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void mdecInit(void) {
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mdec.rl = (u16*)&psxM[0x100000];
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mdec.command = 0;
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mdec.status = 0;
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round_init();
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}
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void mdecWrite0(u32 data) {
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CDR_LOG("mdec0 write %lx", data);
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mdec.command = data;
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if ((data&0xf5ff0000)==0x30000000) {
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mdec.rlsize = data&0xffff;
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}
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}
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void mdecWrite1(u32 data) {
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CDR_LOG("mdec1 write %lx", data);
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if (data&0x80000000) { // mdec reset
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round_init();
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// mdecInit();
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}
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}
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u32 mdecRead0(void) {
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CDR_LOG("mdec0 read %lx", mdec.command);
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return mdec.command;
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}
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u32 mdecRead1(void) {
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#ifdef CDR_LOG
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CDR_LOG("mdec1 read %lx", mdec.status);
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#endif
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return mdec.status;
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}
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void psxDma0(u32 adr, u32 bcr, u32 chcr) {
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int cmd = mdec.command;
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int size;
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CDR_LOG("DMA0 %lx %lx %lx", adr, bcr, chcr);
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if (chcr!=0x01000201) return;
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size = (bcr>>16)*(bcr&0xffff);
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if (cmd==0x40000001) {
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u8 *p = (u8*)PSXM(adr);
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iqtab_init(iq_y,p);
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iqtab_init(iq_uv,p+64);
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}
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else if ((cmd&0xf5ff0000)==0x30000000) {
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mdec.rl = (u16*)PSXM(adr);
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}
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HW_DMA0_CHCR &= ~0x01000000;
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psxDmaInterrupt(0);
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}
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void psxDma1(u32 adr, u32 bcr, u32 chcr) {
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int blk[DCTSIZE2*6];
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unsigned short *image;
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int size;
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CDR_LOG("DMA1 %lx %lx %lx (cmd = %lx)", adr, bcr, chcr, mdec.command);
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if (chcr!=0x01000200) return;
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size = (bcr>>16)*(bcr&0xffff);
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image = (u16*)PSXM(adr);
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if (mdec.command&0x08000000) {
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for (;size>0;size-=(16*16)/2,image+=(16*16)) {
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mdec.rl = rl2blk(blk,mdec.rl);
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yuv2rgb15(blk,image);
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}
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} else {
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for (;size>0;size-=(24*16)/2,image+=(24*16)) {
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mdec.rl = rl2blk(blk,mdec.rl);
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yuv2rgb24(blk,(u8 *)image);
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}
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}
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HW_DMA1_CHCR &= ~0x01000000;
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psxDmaInterrupt(1);
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}
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static int zscan[DCTSIZE2] = {
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0 ,1 ,8 ,16,9 ,2 ,3 ,10,
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17,24,32,25,18,11,4 ,5 ,
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12,19,26,33,40,48,41,34,
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27,20,13,6 ,7 ,14,21,28,
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35,42,49,56,57,50,43,36,
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29,22,15,23,30,37,44,51,
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58,59,52,45,38,31,39,46,
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53,60,61,54,47,55,62,63
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};
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static int aanscales[DCTSIZE2] = {
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16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
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22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270,
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21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906,
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19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315,
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16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520,
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12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552,
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8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446,
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4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247
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};
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void iqtab_init(int *iqtab,unsigned char *iq_y)
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{
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int i;
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for(i=0;i<DCTSIZE2;i++) {
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iqtab[i] =iq_y[i] *aanscales[zscan[i]]>>(CONST_BITS14-IFAST_SCALE_BITS);
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}
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}
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unsigned short* rl2blk(int *blk,unsigned short *mdec_rl) {
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int i,k,q_scale,rl;
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int *iqtab;
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memset (blk, 0, 6*DCTSIZE2*4);
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iqtab = iq_uv;
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for(i=0;i<6;i++) { // decode blocks (Cr,Cb,Y1,Y2,Y3,Y4)
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if (i>1) iqtab = iq_y;
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// zigzag transformation
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rl = *mdec_rl++;
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q_scale = RUNOF(rl);
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blk[0] = iqtab[0]*VALOF(rl);
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for(k = 0;;) {
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rl = *mdec_rl++;
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if (rl==NOP) break;
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k += RUNOF(rl)+1; // skip level zero-coefficients
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if (k > 63) break;
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blk[zscan[k]] = (VALOF(rl) * iqtab[k] * q_scale) / 8; // / 16;
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}
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idct(blk,k+1);
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blk+=DCTSIZE2;
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}
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return mdec_rl;
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}
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unsigned char roundtbl[256*3];
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void round_init(void) {
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int i;
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for(i=0;i<256;i++) {
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roundtbl[i]=0;
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roundtbl[i+256]=i;
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roundtbl[i+512]=255;
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}
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}
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void yuv2rgb15(int *blk,unsigned short *image) {
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int x,y;
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int *Yblk = blk+DCTSIZE2*2;
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int Cb,Cr,R,G,B;
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int *Cbblk = blk;
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int *Crblk = blk+DCTSIZE2;
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if (!(Config.Mdec&0x1))
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for (y=0;y<16;y+=2,Crblk+=4,Cbblk+=4,Yblk+=8,image+=24) {
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if (y==8) Yblk+=DCTSIZE2;
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for (x=0;x<4;x++,image+=2,Crblk++,Cbblk++,Yblk+=2) {
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Cr = *Crblk;
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Cb = *Cbblk;
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R = MULR(Cr);
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G = MULG(Cb) + MULG2(Cr);
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B = MULB(Cb);
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RGB15(0, Yblk[0]);
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RGB15(1, Yblk[1]);
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RGB15(16, Yblk[8]);
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RGB15(17, Yblk[9]);
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Cr = *(Crblk+4);
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Cb = *(Cbblk+4);
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R = MULR(Cr);
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G = MULG(Cb) + MULG2(Cr);
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B = MULB(Cb);
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RGB15(8, Yblk[DCTSIZE2+0]);
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RGB15(9, Yblk[DCTSIZE2+1]);
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RGB15(24, Yblk[DCTSIZE2+8]);
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RGB15(25, Yblk[DCTSIZE2+9]);
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}
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} else
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for (y=0;y<16;y+=2,Yblk+=8,image+=24) {
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if (y==8) Yblk+=DCTSIZE2;
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for (x=0;x<4;x++,image+=2,Yblk+=2) {
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RGB15BW(0, Yblk[0]);
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RGB15BW(1, Yblk[1]);
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RGB15BW(16, Yblk[8]);
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RGB15BW(17, Yblk[9]);
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RGB15BW(8, Yblk[DCTSIZE2+0]);
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RGB15BW(9, Yblk[DCTSIZE2+1]);
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RGB15BW(24, Yblk[DCTSIZE2+8]);
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RGB15BW(25, Yblk[DCTSIZE2+9]);
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}
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}
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}
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void yuv2rgb24(int *blk,unsigned char *image) {
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int x,y;
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int *Yblk = blk+DCTSIZE2*2;
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int Cb,Cr,R,G,B;
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int *Cbblk = blk;
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int *Crblk = blk+DCTSIZE2;
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if (!(Config.Mdec&0x1))
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for (y=0;y<16;y+=2,Crblk+=4,Cbblk+=4,Yblk+=8,image+=24*3) {
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if (y==8) Yblk+=DCTSIZE2;
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for (x=0;x<4;x++,image+=6,Crblk++,Cbblk++,Yblk+=2) {
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Cr = *Crblk;
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Cb = *Cbblk;
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R = MULR(Cr);
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G = MULG(Cb) + MULG2(Cr);
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B = MULB(Cb);
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RGB24(0, Yblk[0]);
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RGB24(1*3, Yblk[1]);
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RGB24(16*3, Yblk[8]);
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RGB24(17*3, Yblk[9]);
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Cr = *(Crblk+4);
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Cb = *(Cbblk+4);
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R = MULR(Cr);
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G = MULG(Cb) + MULG2(Cr);
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B = MULB(Cb);
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RGB24(8*3, Yblk[DCTSIZE2+0]);
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RGB24(9*3, Yblk[DCTSIZE2+1]);
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RGB24(24*3, Yblk[DCTSIZE2+8]);
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RGB24(25*3, Yblk[DCTSIZE2+9]);
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}
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} else
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for (y=0;y<16;y+=2,Yblk+=8,image+=24*3) {
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if (y==8) Yblk+=DCTSIZE2;
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for (x=0;x<4;x++,image+=6,Yblk+=2) {
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RGB24BW(0, Yblk[0]);
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RGB24BW(1*3, Yblk[1]);
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RGB24BW(16*3, Yblk[8]);
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RGB24BW(17*3, Yblk[9]);
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RGB24BW(8*3, Yblk[DCTSIZE2+0]);
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RGB24BW(9*3, Yblk[DCTSIZE2+1]);
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RGB24BW(24*3, Yblk[DCTSIZE2+8]);
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RGB24BW(25*3, Yblk[DCTSIZE2+9]);
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}
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}
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}
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int SaveState::mdecFreeze() {
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Freeze(mdec);
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Freeze(iq_y);
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Freeze(iq_uv);
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return 0;
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}
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#endif
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