standalone: allow scaler to cut off the letterbox

[pcsx_rearmed.git] / plugins / dfsound / dma.c

/***************************************************************************\r
                            dma.c  -  description\r
                             -------------------\r
    begin                : Wed May 15 2002\r
    copyright            : (C) 2002 by Pete Bernert\r
    email                : BlackDove@addcom.de\r
 ***************************************************************************/\r
/***************************************************************************\r
 *                                                                         *\r
 *   This program is free software; you can redistribute it and/or modify  *\r
 *   it under the terms of the GNU General Public License as published by  *\r
 *   the Free Software Foundation; either version 2 of the License, or     *\r
 *   (at your option) any later version. See also the license.txt file for *\r
 *   additional informations.                                              *\r
 *                                                                         *\r
 ***************************************************************************/\r
\r
#include "stdafx.h"\r
\r
#define _IN_DMA\r
\r
#include "externals.h"\r
#include "registers.h"\r
\r
static void set_dma_end(int iSize, unsigned int cycles)\r
{\r
 // this must be > psxdma.c dma irq\r
 // Road Rash also wants a considerable delay, maybe because of fifo?\r
 cycles += iSize * 20;  // maybe\r
 cycles |= 1;           // indicates dma is active\r
 spu.cycles_dma_end = cycles;\r
}\r
\r
////////////////////////////////////////////////////////////////////////\r
// READ DMA (many values)\r
////////////////////////////////////////////////////////////////////////\r
\r
void CALLBACK SPUreadDMAMem(unsigned short *pusPSXMem, int iSize,\r
 unsigned int cycles)\r
{\r
 unsigned int addr = spu.spuAddr, irq_addr = regAreaGet(H_SPUirqAddr) << 3;\r
 int i, irq_after;\r
\r
 do_samples_if_needed(cycles, 1, 2);\r
 irq_after = (irq_addr - addr) & 0x7ffff;\r
\r
 for(i = 0; i < iSize; i++)\r
 {\r
  *pusPSXMem++ = *(unsigned short *)(spu.spuMemC + addr);\r
  addr += 2;\r
  addr &= 0x7fffe;\r
 }\r
 if ((spu.spuCtrl & CTRL_IRQ) && irq_after < iSize * 2) {\r
  log_unhandled("rdma spu irq: %x/%x-%x\n", irq_addr, spu.spuAddr, addr);\r
  do_irq_io(irq_after);\r
 }\r
 spu.spuAddr = addr;\r
 set_dma_end(iSize, cycles);\r
}\r
\r
////////////////////////////////////////////////////////////////////////\r
// WRITE DMA (many values)\r
////////////////////////////////////////////////////////////////////////\r
\r
void CALLBACK SPUwriteDMAMem(unsigned short *pusPSXMem, int iSize,\r
 unsigned int cycles)\r
{\r
 unsigned int addr = spu.spuAddr, irq_addr = regAreaGet(H_SPUirqAddr) << 3;\r
 int i, irq_after;\r
 \r
 do_samples_if_needed(cycles + iSize*2 * 4, 1, 2);\r
 irq_after = (irq_addr - addr) & 0x7ffff;\r
 spu.bMemDirty = 1;\r
\r
 if (addr + iSize*2 < 0x80000)\r
 {\r
  memcpy(spu.spuMemC + addr, pusPSXMem, iSize*2);\r
  addr += iSize*2;\r
 }\r
 else\r
 {\r
  for (i = 0; i < iSize; i++)\r
  {\r
   *(unsigned short *)(spu.spuMemC + addr) = *pusPSXMem++;\r
   addr += 2;\r
   addr &= 0x7fffe;\r
  }\r
 }\r
 if ((spu.spuCtrl & CTRL_IRQ) && irq_after < iSize * 2) {\r
  log_unhandled("%u wdma spu irq: %x/%x-%x (%u)\n",\r
    cycles, irq_addr, spu.spuAddr, addr, irq_after);\r
  // this should be consistent with psxdma.c timing\r
  // might also need more delay like in set_dma_end()\r
  do_irq_io(irq_after * 4);\r
 }\r
 for (i = 0; i < MAXCHAN; i++) {\r
  size_t ediff, p = spu.s_chan[i].pCurr - spu.spuMemC;\r
  if (spu.s_chan[i].ADSRX.State == ADSR_RELEASE && !spu.s_chan[i].ADSRX.EnvelopeVol)\r
   continue;\r
  ediff = addr - p;\r
  if (spu.spuAddr < p && p < spu.spuAddr + iSize * 2) {\r
   log_unhandled("%u spu ch%02d play %zx dma %x-%x (%zd)\n",\r
     cycles, i, p, spu.spuAddr, addr, ediff);\r
   //exit(1);\r
  }\r
  // a hack for the super annoying timing issues in The Emperor's New Groove\r
  // (which is a game bug, but tends to trigger more here)\r
  if (ediff <= 0x20u) {\r
   spu.s_chan[i].pCurr += ediff;\r
   break;\r
  }\r
 }\r
 spu.spuAddr = addr;\r
 set_dma_end(iSize, cycles);\r
}\r
\r
////////////////////////////////////////////////////////////////////////\r
// vim:shiftwidth=1:expandtab\r