229 lines
7.2 KiB
C++
229 lines
7.2 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
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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, version 2.0.
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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 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include <string.h>
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#include "Setup.h"
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#ifdef SETUP_TIMER_WAITING
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#include "../../../Plugins/Plugin_VideoOGL/Src/OS/Win32.h"
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#endif
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#include "MemoryUtil.h"
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#include "Thread.h"
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#include "OpcodeDecoding.h"
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#include "Fifo.h"
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// TODO (mb2): move/rm this global
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volatile u32 g_XFBUpdateRequested = FALSE;
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extern u8* g_pVideoData;
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namespace {
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static volatile bool fifoStateRun = false;
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static u8 *videoBuffer;
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static Common::Event fifo_exit_event;
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// STATE_TO_SAVE
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static int size = 0;
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} // namespace
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void Fifo_DoState(PointerWrap &p)
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{
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p.DoArray(videoBuffer, FIFO_SIZE);
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p.Do(size);
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int pos = (int)(g_pVideoData - videoBuffer); // get offset
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p.Do(pos); // read or write offset (depends on the mode afaik)
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g_pVideoData = &videoBuffer[pos]; // overwrite g_pVideoData -> expected no change when load ss and change when save ss
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}
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void Fifo_Init()
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{
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videoBuffer = (u8*)AllocateMemoryPages(FIFO_SIZE);
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fifo_exit_event.Init();
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fifoStateRun = false;
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g_XFBUpdateRequested = FALSE;
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}
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void Fifo_Shutdown()
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{
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if (fifoStateRun)
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PanicAlert("Fifo shutting down while active");
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FreeMemoryPages(videoBuffer, FIFO_SIZE);
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}
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u8* FAKE_GetFifoStartPtr()
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{
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return videoBuffer;
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}
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u8* FAKE_GetFifoEndPtr()
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{
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return &videoBuffer[size];
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}
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// Executed from another thread, no the graphics thread!
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// Basically, all it does is set a flag so that the loop will eventually exit, then
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// waits for the event to be set, which happens when the loop does exit.
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// If we look stuck in here, then the video thread is stuck in something and won't exit
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// the loop. Switch to the video thread and investigate.
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void Fifo_ExitLoop()
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{
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fifoStateRun = false;
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#ifndef SETUP_TIMER_WAITING
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fifo_exit_event.MsgWait();
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fifo_exit_event.Shutdown();
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#else
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//Console::Print("Video: Fifo_ExitLoop: Done:%i\n", fifo_exit_event.DoneWait());
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if (fifo_exit_event.TimerWait(Fifo_ExitLoop))
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{
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//Console::Print("Video: Fifo_Shutdown: Done:%i\n\n", fifo_exit_event.DoneWait());
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fifo_exit_event.Shutdown();
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PostMessage(EmuWindow::GetParentWnd(), WM_USER, OPENGL_VIDEO_STOP, 0);
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}
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#endif
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}
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// May be executed from any thread, even the graphics thread.
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// Created to allow for self shutdown.
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void Fifo_ExitLoopNonBlocking() {
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fifoStateRun = false;
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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// Description: Fifo_EnterLoop() sends data through this function.
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// TODO: Possibly inline it? This one is exported so it will likely not be inlined at all.
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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void Video_SendFifoData(u8* _uData, u32 len)
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{
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if (size + len >= FIFO_SIZE)
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{
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int pos = (int)(g_pVideoData - videoBuffer);
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if (size - pos > pos)
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{
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PanicAlert("FIFO out of bounds (sz = %i, at %08x)", size, pos);
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}
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memmove(&videoBuffer[0], &videoBuffer[pos], size - pos);
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size -= pos;
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g_pVideoData = FAKE_GetFifoStartPtr();
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}
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// Copy new video instructions to videoBuffer for future use in rendering the new picture
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memcpy(videoBuffer + size, _uData, len);
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size += len;
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OpcodeDecoder_Run();
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////////////////
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// Description: Main FIFO update loop
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// Purpose: Keep the Core HW updated about the CPU-GPU distance
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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void Fifo_EnterLoop(const SVideoInitialize &video_initialize)
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{
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fifoStateRun = true;
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SCPFifoStruct &_fifo = *video_initialize.pCPFifo;
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s32 distToSend;
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while (fifoStateRun)
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{
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#if defined(_WIN32) && !defined(SETUP_AVOID_OPENGL_SCREEN_MESSAGE_HANG)
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video_initialize.pPeekMessages();
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#endif
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if (_fifo.CPReadWriteDistance == 0)
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Common::SleepCurrentThread(1);
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// Draw XFB if CP/GPfifo isn't used
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if (g_XFBUpdateRequested)
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{
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Video_UpdateXFB(NULL, 0, 0, 0, FALSE);
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video_initialize.pCopiedToXFB();
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}
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// check if we are able to run this buffer
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if ((_fifo.bFF_GPReadEnable) && _fifo.CPReadWriteDistance && !(_fifo.bFF_BPEnable && _fifo.bFF_Breakpoint))
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{
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Common::SyncInterlockedExchange((LONG*)&_fifo.CPReadIdle, 0);
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//video_initialize.pLog("RUN...........................",FALSE);
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int peek_counter = 0;
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while (_fifo.bFF_GPReadEnable && _fifo.CPReadWriteDistance)
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{
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peek_counter++;
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if (peek_counter == 1000) {
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video_initialize.pPeekMessages();
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peek_counter = 0;
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}
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// Create pointer to video data and send it to the VideoPlugin
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u32 readPtr = _fifo.CPReadPointer;
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u8 *uData = video_initialize.pGetMemoryPointer(readPtr);
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// if we are on BP mode we must send 32B chunks to Video plugin for BP checking
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// TODO (mb2): test & check if MP1/MP2 realy need this now.
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if (_fifo.bFF_BPEnable)
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{
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if (readPtr == _fifo.CPBreakpoint)
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{
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video_initialize.pLog("!!! BP irq raised",FALSE);
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Common::SyncInterlockedExchange((LONG*)&_fifo.bFF_Breakpoint, 1);
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video_initialize.pUpdateInterrupts();
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break;
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}
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distToSend = 32;
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readPtr += 32;
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if ( readPtr >= _fifo.CPEnd)
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readPtr = _fifo.CPBase;
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}
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else
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{
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#if 0 // ugly random GP slowdown for testing DC robustness... TODO: remove when completly sure DC is ok
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int r = rand();
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if ((r & 0xF) == r)
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Common::SleepCurrentThread(r);
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distToSend = 32;
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readPtr += 32;
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if (readPtr >= _fifo.CPEnd)
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readPtr = _fifo.CPBase;
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#else
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distToSend = _fifo.CPReadWriteDistance;
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// send 1024B chunk max length to have better control over PeekMessages' period
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distToSend = distToSend > 1024 ? 1024 : distToSend;
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if ((distToSend + readPtr) >= _fifo.CPEnd) // TODO: better?
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{
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distToSend =_fifo.CPEnd - readPtr;
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readPtr = _fifo.CPBase;
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}
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else
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readPtr += distToSend;
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#endif
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}
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// Execute new instructions found in uData
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Video_SendFifoData(uData, distToSend);
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Common::SyncInterlockedExchange((LONG*)&_fifo.CPReadPointer, readPtr);
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Common::SyncInterlockedExchangeAdd((LONG*)&_fifo.CPReadWriteDistance, -distToSend);
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}
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//video_initialize.pLog("..........................IDLE",FALSE);
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Common::SyncInterlockedExchange((LONG*)&_fifo.CPReadIdle, 1);
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}
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}
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fifo_exit_event.Set();
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#ifdef SETUP_TIMER_WAITING
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fifo_exit_event.SetTimer();
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#endif
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}
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//////////////////////////////////////////////////////////////////////////////////////////
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