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Remove unnecessary Src/ folders
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247
Source/Core/VideoCommon/Fifo.cpp
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247
Source/Core/VideoCommon/Fifo.cpp
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// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#include "VideoConfig.h"
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#include "MemoryUtil.h"
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#include "Thread.h"
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#include "Atomic.h"
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#include "OpcodeDecoding.h"
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#include "CommandProcessor.h"
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#include "PixelEngine.h"
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#include "ChunkFile.h"
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#include "Fifo.h"
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#include "HW/Memmap.h"
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#include "Core.h"
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#include "CoreTiming.h"
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volatile bool g_bSkipCurrentFrame = false;
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extern u8* g_pVideoData;
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namespace
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{
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static volatile bool GpuRunningState = false;
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static volatile bool EmuRunningState = false;
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static std::mutex m_csHWVidOccupied;
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// STATE_TO_SAVE
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static u8 *videoBuffer;
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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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p.DoPointer(g_pVideoData, videoBuffer);
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p.Do(g_bSkipCurrentFrame);
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}
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void Fifo_PauseAndLock(bool doLock, bool unpauseOnUnlock)
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{
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if (doLock)
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{
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EmulatorState(false);
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if (!Core::IsGPUThread())
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m_csHWVidOccupied.lock();
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_dbg_assert_(COMMON, !CommandProcessor::fifo.isGpuReadingData);
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}
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else
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{
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if (unpauseOnUnlock)
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EmulatorState(true);
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if (!Core::IsGPUThread())
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m_csHWVidOccupied.unlock();
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}
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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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size = 0;
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GpuRunningState = false;
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Common::AtomicStore(CommandProcessor::VITicks, CommandProcessor::m_cpClockOrigin);
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}
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void Fifo_Shutdown()
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{
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if (GpuRunningState) PanicAlert("Fifo shutting down while active");
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FreeMemoryPages(videoBuffer, FIFO_SIZE);
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}
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u8* GetVideoBufferStartPtr()
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{
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return videoBuffer;
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}
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u8* GetVideoBufferEndPtr()
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{
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return &videoBuffer[size];
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}
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void Fifo_SetRendering(bool enabled)
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{
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g_bSkipCurrentFrame = !enabled;
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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 ExitGpuLoop()
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{
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// This should break the wait loop in CPU thread
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CommandProcessor::fifo.bFF_GPReadEnable = false;
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SCPFifoStruct &fifo = CommandProcessor::fifo;
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while(fifo.isGpuReadingData) Common::YieldCPU();
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// Terminate GPU thread loop
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GpuRunningState = false;
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EmuRunningState = true;
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}
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void EmulatorState(bool running)
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{
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EmuRunningState = running;
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}
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// Description: RunGpuLoop() sends data through this function.
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void ReadDataFromFifo(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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size -= pos;
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if (size + len > FIFO_SIZE)
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{
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PanicAlert("FIFO out of bounds (size = %i, len = %i at %08x)", size, len, pos);
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}
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memmove(&videoBuffer[0], &videoBuffer[pos], size);
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g_pVideoData = videoBuffer;
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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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}
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void ResetVideoBuffer()
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{
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g_pVideoData = videoBuffer;
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size = 0;
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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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void RunGpuLoop()
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{
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std::lock_guard<std::mutex> lk(m_csHWVidOccupied);
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GpuRunningState = true;
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SCPFifoStruct &fifo = CommandProcessor::fifo;
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u32 cyclesExecuted = 0;
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while (GpuRunningState)
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{
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g_video_backend->PeekMessages();
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VideoFifo_CheckAsyncRequest();
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CommandProcessor::SetCpStatus();
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Common::AtomicStore(CommandProcessor::VITicks, CommandProcessor::m_cpClockOrigin);
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// check if we are able to run this buffer
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while (GpuRunningState && !CommandProcessor::interruptWaiting && fifo.bFF_GPReadEnable && fifo.CPReadWriteDistance && !AtBreakpoint())
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{
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fifo.isGpuReadingData = true;
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CommandProcessor::isPossibleWaitingSetDrawDone = fifo.bFF_GPLinkEnable ? true : false;
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if (!Core::g_CoreStartupParameter.bSyncGPU || Common::AtomicLoad(CommandProcessor::VITicks) > CommandProcessor::m_cpClockOrigin)
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{
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u32 readPtr = fifo.CPReadPointer;
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u8 *uData = Memory::GetPointer(readPtr);
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if (readPtr == fifo.CPEnd)
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readPtr = fifo.CPBase;
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else
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readPtr += 32;
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_assert_msg_(COMMANDPROCESSOR, (s32)fifo.CPReadWriteDistance - 32 >= 0 ,
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"Negative fifo.CPReadWriteDistance = %i in FIFO Loop !\nThat can produce instability in the game. Please report it.", fifo.CPReadWriteDistance - 32);
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ReadDataFromFifo(uData, 32);
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cyclesExecuted = OpcodeDecoder_Run(g_bSkipCurrentFrame);
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if (Core::g_CoreStartupParameter.bSyncGPU && Common::AtomicLoad(CommandProcessor::VITicks) > cyclesExecuted)
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Common::AtomicAdd(CommandProcessor::VITicks, -(s32)cyclesExecuted);
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Common::AtomicStore(fifo.CPReadPointer, readPtr);
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Common::AtomicAdd(fifo.CPReadWriteDistance, -32);
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if((GetVideoBufferEndPtr() - g_pVideoData) == 0)
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Common::AtomicStore(fifo.SafeCPReadPointer, fifo.CPReadPointer);
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}
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CommandProcessor::SetCpStatus();
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// This call is pretty important in DualCore mode and must be called in the FIFO Loop.
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// If we don't, s_swapRequested or s_efbAccessRequested won't be set to false
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// leading the CPU thread to wait in Video_BeginField or Video_AccessEFB thus slowing things down.
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VideoFifo_CheckAsyncRequest();
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CommandProcessor::isPossibleWaitingSetDrawDone = false;
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}
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fifo.isGpuReadingData = false;
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if (EmuRunningState)
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{
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// NOTE(jsd): Calling SwitchToThread() on Windows 7 x64 is a hot spot, according to profiler.
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// See https://docs.google.com/spreadsheet/ccc?key=0Ah4nh0yGtjrgdFpDeF9pS3V6RUotRVE3S3J4TGM1NlE#gid=0
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// for benchmark details.
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#if 0
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Common::YieldCPU();
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#endif
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}
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else
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{
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// While the emu is paused, we still handle async requests then sleep.
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while (!EmuRunningState)
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{
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g_video_backend->PeekMessages();
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m_csHWVidOccupied.unlock();
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Common::SleepCurrentThread(1);
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m_csHWVidOccupied.lock();
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}
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}
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}
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}
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bool AtBreakpoint()
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{
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SCPFifoStruct &fifo = CommandProcessor::fifo;
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return fifo.bFF_BPEnable && (fifo.CPReadPointer == fifo.CPBreakpoint);
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}
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void RunGpu()
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{
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SCPFifoStruct &fifo = CommandProcessor::fifo;
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while (fifo.bFF_GPReadEnable && fifo.CPReadWriteDistance && !AtBreakpoint() )
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{
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u8 *uData = Memory::GetPointer(fifo.CPReadPointer);
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FPURoundMode::SaveSIMDState();
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FPURoundMode::LoadDefaultSIMDState();
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ReadDataFromFifo(uData, 32);
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OpcodeDecoder_Run(g_bSkipCurrentFrame);
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FPURoundMode::LoadSIMDState();
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//DEBUG_LOG(COMMANDPROCESSOR, "Fifo wraps to base");
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if (fifo.CPReadPointer == fifo.CPEnd)
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fifo.CPReadPointer = fifo.CPBase;
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else
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fifo.CPReadPointer += 32;
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fifo.CPReadWriteDistance -= 32;
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}
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CommandProcessor::SetCpStatus();
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}
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