mirror of https://github.com/PCSX2/pcsx2.git
cdvdgigaherz: Reduce disc info ioctl calls
It's rather unnecessary to use the same ioctls multiple times per disc when the info returned doesn't change. Just use each ioctl once and read/calculate all the necessary info all at onace. This also fixes an issue where the IOCTL_DVD_START_SESSION ioctl is repeatedly used if the returned session ID is 0. The previous code assumed that 0 was not a valid session ID and would repeatedly use the ioctl to obtain a non-zero session ID. However, 0 is a valid session ID, and it seems IOCTL_DVD_START_SESSION can repeatedly return a 0 session ID even if the corresponding IOCTL_DVD_END_SESSION has not been called. In our case, a DVD session is only necessary for DVD detection and reading the physical format information. This fix seems to alter drive speed behaviour.
This commit is contained in:
Jonathan Li
parent
f8e474a1c5
commit
1f60e3101e
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@ -17,8 +17,12 @@
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#define __CDVD_H__
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#define _WIN32_WINNT 0x0600
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#define NOMINMAX
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#include <windows.h>
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#include <stdio.h>
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#include <cstdio>
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#include <cstring>
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#include <string>
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#define CDVDdefs
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#include <PS2Edefs.h>
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@ -62,38 +66,32 @@ extern toc_data cdtoc;
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class IOCtlSrc
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{
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IOCtlSrc(IOCtlSrc &);
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IOCtlSrc(const IOCtlSrc &) = delete;
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IOCtlSrc &operator=(const IOCtlSrc &) = delete;
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HANDLE m_device;
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HANDLE m_device = INVALID_HANDLE_VALUE;
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std::string m_filename;
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bool OpenOK;
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char sectorbuffer[32 * 2048];
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char fName[256];
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DWORD sessID;
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bool tocCached;
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bool m_disc_ready = false;
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s32 m_media_type = 0;
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u32 m_sectors = 0;
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u32 m_layer_break = 0;
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char tocCacheData[2048];
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bool mediaTypeCached;
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int mediaType;
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bool discSizeCached;
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s32 discSize;
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bool layerBreakCached;
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s32 layerBreak;
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bool ReadDVDInfo();
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bool ReadCDInfo();
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bool RefreshDiscInfo();
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public:
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IOCtlSrc(const char *fileName);
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IOCtlSrc(const char *filename);
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~IOCtlSrc();
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s32 GetSectorCount();
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s32 ReadTOC(char *toc, int size);
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u32 GetSectorCount();
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s32 ReadTOC(char *toc, size_t size);
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s32 ReadSectors2048(u32 sector, u32 count, char *buffer);
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s32 ReadSectors2352(u32 sector, u32 count, char *buffer);
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s32 GetLayerBreakAddress();
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u32 GetLayerBreakAddress();
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s32 GetMediaType();
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void SetSpindleSpeed(bool restore_defaults);
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@ -1,4 +1,5 @@
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/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2016 PCSX2 Dev Team
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* Copyright (C) 2002-2014 David Quintana [gigaherz]
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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@ -26,47 +27,12 @@
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#include <cstddef>
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#include <cstdlib>
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#include <algorithm>
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#include <array>
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s32 IOCtlSrc::Reopen()
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IOCtlSrc::IOCtlSrc(const char *filename)
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: m_filename(filename)
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{
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if (m_device != INVALID_HANDLE_VALUE) {
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DWORD size;
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DeviceIoControl(m_device, IOCTL_DVD_END_SESSION, &sessID, sizeof(DVD_SESSION_ID), NULL, 0, &size, NULL);
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CloseHandle(m_device);
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}
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DWORD size;
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OpenOK = false;
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// SPTI only works if the device is opened with GENERIC_WRITE access.
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m_device = CreateFile(fName, GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ, nullptr, OPEN_EXISTING,
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FILE_FLAG_SEQUENTIAL_SCAN, nullptr);
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if (m_device == INVALID_HANDLE_VALUE)
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return -1;
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// Dual layer DVDs cannot read from layer 1 without this ioctl
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DeviceIoControl(m_device, FSCTL_ALLOW_EXTENDED_DASD_IO, nullptr, 0, nullptr, 0, &size, nullptr);
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// FIXME: 0 is a valid session id, but the code assumes that it isn't.
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sessID = 0;
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DeviceIoControl(m_device, IOCTL_DVD_START_SESSION, NULL, 0, &sessID, sizeof(DVD_SESSION_ID), &size, NULL);
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tocCached = false;
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mediaTypeCached = false;
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discSizeCached = false;
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layerBreakCached = false;
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OpenOK = true;
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return 0;
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}
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IOCtlSrc::IOCtlSrc(const char *fileName)
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{
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m_device = INVALID_HANDLE_VALUE;
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strcpy_s(fName, 256, fileName);
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Reopen();
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SetSpindleSpeed(false);
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}
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@ -75,120 +41,30 @@ IOCtlSrc::~IOCtlSrc()
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{
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if (OpenOK) {
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SetSpindleSpeed(true);
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DWORD size;
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DeviceIoControl(m_device, IOCTL_DVD_END_SESSION, &sessID, sizeof(DVD_SESSION_ID), NULL, 0, &size, NULL);
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CloseHandle(m_device);
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}
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}
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struct mycrap
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s32 IOCtlSrc::Reopen()
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{
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DWORD shit;
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DVD_LAYER_DESCRIPTOR ld;
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// The IOCTL_DVD_READ_STRUCTURE expects a size of at least 22 bytes when
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// reading the dvd physical layer descriptor
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// 4 bytes header
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// 17 bytes for the layer descriptor
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// 1 byte of the media specific data for no reason whatsoever...
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UCHAR fixup;
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};
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DVD_READ_STRUCTURE dvdrs;
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mycrap dld;
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CDROM_READ_TOC_EX tocrq = {0};
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s32 IOCtlSrc::GetSectorCount()
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{
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if (discSizeCached)
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return discSize;
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if (m_device != INVALID_HANDLE_VALUE)
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CloseHandle(m_device);
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DWORD size;
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GET_LENGTH_INFORMATION info;
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if (DeviceIoControl(m_device, IOCTL_DISK_GET_LENGTH_INFO, NULL, 0, &info, sizeof(info), &size, NULL)) {
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discSizeCached = true;
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discSize = (s32)(info.Length.QuadPart / 2048);
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return discSize;
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}
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memset(&tocrq, 0, sizeof(CDROM_READ_TOC_EX));
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tocrq.Format = CDROM_READ_TOC_EX_FORMAT_FULL_TOC;
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tocrq.Msf = 1;
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tocrq.SessionTrack = 1;
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CDROM_TOC_FULL_TOC_DATA *ftd = (CDROM_TOC_FULL_TOC_DATA *)sectorbuffer;
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if (DeviceIoControl(m_device, IOCTL_CDROM_READ_TOC_EX, &tocrq, sizeof(tocrq), ftd, 2048, &size, NULL)) {
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for (int i = 0; i < 101; i++) {
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if (ftd->Descriptors[i].Point == 0xa2) {
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if (ftd->Descriptors[i].SessionNumber == ftd->LastCompleteSession) {
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int min = ftd->Descriptors[i].Msf[0];
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int sec = ftd->Descriptors[i].Msf[1];
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int frm = ftd->Descriptors[i].Msf[2];
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discSizeCached = true;
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discSize = (s32)MSF_TO_LBA(min, sec, frm);
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return discSize;
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}
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}
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}
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}
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dvdrs.BlockByteOffset.QuadPart = 0;
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dvdrs.Format = DvdPhysicalDescriptor;
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dvdrs.SessionId = sessID;
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dvdrs.LayerNumber = 0;
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if (DeviceIoControl(m_device, IOCTL_DVD_READ_STRUCTURE, &dvdrs, sizeof(dvdrs), &dld, sizeof(dld), &size, NULL) != 0) {
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s32 sectors1 = _byteswap_ulong(dld.ld.EndDataSector) - _byteswap_ulong(dld.ld.StartingDataSector) + 1;
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if (dld.ld.NumberOfLayers == 1) { // PTP, OTP
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if (dld.ld.TrackPath == 0) { // PTP
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dvdrs.LayerNumber = 1;
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if (DeviceIoControl(m_device, IOCTL_DVD_READ_STRUCTURE, &dvdrs, sizeof(dvdrs), &dld, sizeof(dld), &size, nullptr) != 0) {
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sectors1 += _byteswap_ulong(dld.ld.EndDataSector) - _byteswap_ulong(dld.ld.StartingDataSector) + 1;
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}
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} else { // OTP
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// sectors = end_sector - (~end_sector_l0 & 0xFFFFFF) + end_sector_l0 - start_sector
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dld.ld.EndLayerZeroSector = _byteswap_ulong(dld.ld.EndLayerZeroSector);
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sectors1 += dld.ld.EndLayerZeroSector - (~dld.ld.EndLayerZeroSector & 0x00FFFFFF) + 1;
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}
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}
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discSizeCached = true;
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discSize = sectors1;
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return discSize;
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}
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return -1;
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}
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s32 IOCtlSrc::GetLayerBreakAddress()
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{
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DWORD size;
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if (GetMediaType() < 0)
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OpenOK = false;
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// SPTI only works if the device is opened with GENERIC_WRITE access.
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m_device = CreateFile(m_filename.c_str(), GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ, nullptr, OPEN_EXISTING,
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FILE_FLAG_SEQUENTIAL_SCAN, nullptr);
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if (m_device == INVALID_HANDLE_VALUE)
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return -1;
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if (layerBreakCached)
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return layerBreak;
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// Required to read from layer 1 of Dual layer DVDs
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DeviceIoControl(m_device, FSCTL_ALLOW_EXTENDED_DASD_IO, nullptr, 0, nullptr, 0, &size, nullptr);
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dvdrs.BlockByteOffset.QuadPart = 0;
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dvdrs.Format = DvdPhysicalDescriptor;
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dvdrs.SessionId = sessID;
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dvdrs.LayerNumber = 0;
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if (DeviceIoControl(m_device, IOCTL_DVD_READ_STRUCTURE, &dvdrs, sizeof(dvdrs), &dld, sizeof(dld), &size, nullptr)) {
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if (dld.ld.NumberOfLayers == 0) { // Single layer
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layerBreak = 0;
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} else if (dld.ld.TrackPath == 0) { // PTP
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layerBreak = _byteswap_ulong(dld.ld.EndDataSector) - _byteswap_ulong(dld.ld.StartingDataSector);
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} else { // OTP
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layerBreak = _byteswap_ulong(dld.ld.EndLayerZeroSector) - _byteswap_ulong(dld.ld.StartingDataSector);
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}
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layerBreakCached = true;
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return layerBreak;
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}
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//if not a cd, and fails, assume single layer
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m_disc_ready = false;
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OpenOK = true;
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return 0;
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}
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@ -237,74 +113,42 @@ void IOCtlSrc::SetSpindleSpeed(bool restore_defaults)
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}
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}
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u32 IOCtlSrc::GetSectorCount()
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{
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if (!m_disc_ready)
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RefreshDiscInfo();
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return m_sectors;
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}
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u32 IOCtlSrc::GetLayerBreakAddress()
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{
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if (!m_disc_ready)
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RefreshDiscInfo();
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if (GetMediaType() < 0)
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return 0;
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return m_layer_break;
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}
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s32 IOCtlSrc::GetMediaType()
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{
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DWORD size;
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if (!m_disc_ready)
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RefreshDiscInfo();
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if (mediaTypeCached)
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return mediaType;
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memset(&tocrq, 0, sizeof(CDROM_READ_TOC_EX));
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tocrq.Format = CDROM_READ_TOC_EX_FORMAT_FULL_TOC;
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tocrq.Msf = 1;
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tocrq.SessionTrack = 1;
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CDROM_TOC_FULL_TOC_DATA *ftd = (CDROM_TOC_FULL_TOC_DATA *)sectorbuffer;
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if (DeviceIoControl(m_device, IOCTL_CDROM_READ_TOC_EX, &tocrq, sizeof(tocrq), ftd, 2048, &size, NULL)) {
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mediaTypeCached = true;
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mediaType = -1;
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return mediaType;
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return m_media_type;
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}
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dvdrs.BlockByteOffset.QuadPart = 0;
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dvdrs.Format = DvdPhysicalDescriptor;
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dvdrs.SessionId = sessID;
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dvdrs.LayerNumber = 0;
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if (DeviceIoControl(m_device, IOCTL_DVD_READ_STRUCTURE, &dvdrs, sizeof(dvdrs), &dld, sizeof(dld), &size, nullptr)) {
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if (dld.ld.NumberOfLayers == 0) { // Single layer
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mediaType = 0;
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} else if (dld.ld.TrackPath == 0) { // PTP
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mediaType = 1;
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} else { // OTP
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mediaType = 2;
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}
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mediaTypeCached = true;
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return mediaType;
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}
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//if not a cd, and fails, assume single layer
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mediaTypeCached = true;
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mediaType = 0;
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return mediaType;
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}
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s32 IOCtlSrc::ReadTOC(char *toc, int msize)
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s32 IOCtlSrc::ReadTOC(char *toc, size_t size)
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{
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DWORD size = 0;
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if (!m_disc_ready)
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RefreshDiscInfo();
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if (GetMediaType() >= 0)
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return -1;
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if (!tocCached) {
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memset(&tocrq, 0, sizeof(CDROM_READ_TOC_EX));
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tocrq.Format = CDROM_READ_TOC_EX_FORMAT_FULL_TOC;
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tocrq.Msf = 1;
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tocrq.SessionTrack = 1;
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if (!OpenOK)
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return -1;
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int code = DeviceIoControl(m_device, IOCTL_CDROM_READ_TOC_EX, &tocrq, sizeof(tocrq), tocCacheData, 2048, &size, NULL);
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if (code == 0)
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return -1;
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tocCached = true;
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}
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memcpy(toc, tocCacheData, min(2048, msize));
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memcpy(toc, tocCacheData, std::min(size, sizeof(tocCacheData)));
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return 0;
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}
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@ -398,6 +242,108 @@ s32 IOCtlSrc::ReadSectors2352(u32 sector, u32 count, char *buffer)
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return 0;
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}
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bool IOCtlSrc::ReadDVDInfo()
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{
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DWORD unused;
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DVD_SESSION_ID session_id;
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BOOL ret = DeviceIoControl(m_device, IOCTL_DVD_START_SESSION, nullptr, 0,
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&session_id, sizeof(session_id), &unused, nullptr);
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if (!ret)
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return false;
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// 4 bytes header + 18 bytes layer descriptor - Technically you only need
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// to read 17 bytes of the layer descriptor since bytes 17-2047 is for
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// media specific information. However, Windows requires you to read at
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// least 18 bytes of the layer descriptor or else the ioctl will fail. The
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// media specific information seems to be empty, so there's no point reading
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// any more than that.
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std::array<u8, 22> buffer;
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DVD_READ_STRUCTURE dvdrs{{0}, DvdPhysicalDescriptor, session_id, 0};
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ret = DeviceIoControl(m_device, IOCTL_DVD_READ_STRUCTURE, &dvdrs, sizeof(dvdrs),
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buffer.data(), buffer.size(), &unused, nullptr);
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if (ret) {
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auto &layer = *reinterpret_cast<DVD_LAYER_DESCRIPTOR *>(
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reinterpret_cast<DVD_DESCRIPTOR_HEADER *>(buffer.data())->Data);
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u32 start_sector = _byteswap_ulong(layer.StartingDataSector);
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u32 end_sector = _byteswap_ulong(layer.EndDataSector);
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if (layer.NumberOfLayers == 0) {
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// Single layer
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m_media_type = 0;
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m_layer_break = 0;
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m_sectors = end_sector - start_sector + 1;
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} else if (layer.TrackPath == 0) {
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// Dual layer, Parallel Track Path
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dvdrs.LayerNumber = 1;
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ret = DeviceIoControl(m_device, IOCTL_DVD_READ_STRUCTURE, &dvdrs,
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sizeof(dvdrs), buffer.data(), buffer.size(), &unused, nullptr);
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if (ret) {
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u32 layer1_start_sector = _byteswap_ulong(layer.StartingDataSector);
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u32 layer1_end_sector = _byteswap_ulong(layer.EndDataSector);
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m_media_type = 1;
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m_layer_break = end_sector - start_sector;
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m_sectors = end_sector - start_sector + 1 + layer1_end_sector - layer1_start_sector + 1;
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}
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} else {
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// Dual layer, Opposite Track Path
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u32 end_sector_layer0 = _byteswap_ulong(layer.EndLayerZeroSector);
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m_media_type = 2;
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m_layer_break = end_sector_layer0 - start_sector;
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m_sectors = end_sector_layer0 - start_sector + 1 + end_sector - (~end_sector_layer0 & 0xFFFFFFU) + 1;
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}
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}
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DeviceIoControl(m_device, IOCTL_DVD_END_SESSION, &session_id,
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sizeof(session_id), nullptr, 0, &unused, nullptr);
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return !!ret;
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}
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bool IOCtlSrc::ReadCDInfo()
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{
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DWORD unused;
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CDROM_READ_TOC_EX toc_ex{};
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toc_ex.Format = CDROM_READ_TOC_EX_FORMAT_FULL_TOC;
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toc_ex.Msf = 1;
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toc_ex.SessionTrack = 1;
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if (!DeviceIoControl(m_device, IOCTL_CDROM_READ_TOC_EX, &toc_ex,
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sizeof(toc_ex), tocCacheData, sizeof(tocCacheData), &unused, nullptr))
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return false;
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GET_LENGTH_INFORMATION info;
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if (!DeviceIoControl(m_device, IOCTL_DISK_GET_LENGTH_INFO, nullptr, 0, &info,
|
||||
sizeof(info), &unused, nullptr))
|
||||
return false;
|
||||
|
||||
m_sectors = static_cast<u32>(info.Length.QuadPart / 2048);
|
||||
m_media_type = -1;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool IOCtlSrc::RefreshDiscInfo()
|
||||
{
|
||||
if (m_disc_ready)
|
||||
return true;
|
||||
|
||||
m_media_type = 0;
|
||||
m_layer_break = 0;
|
||||
m_sectors = 0;
|
||||
|
||||
if (!OpenOK)
|
||||
return false;
|
||||
|
||||
if (ReadDVDInfo() || ReadCDInfo())
|
||||
m_disc_ready = true;
|
||||
|
||||
return m_disc_ready;
|
||||
}
|
||||
|
||||
s32 IOCtlSrc::DiscChanged()
|
||||
{
|
||||
DWORD size = 0;
|
||||
|
|
@ -408,22 +354,11 @@ s32 IOCtlSrc::DiscChanged()
|
|||
int ret = DeviceIoControl(m_device, IOCTL_STORAGE_CHECK_VERIFY, NULL, 0, NULL, 0, &size, NULL);
|
||||
|
||||
if (ret == 0) {
|
||||
tocCached = false;
|
||||
mediaTypeCached = false;
|
||||
discSizeCached = false;
|
||||
layerBreakCached = false;
|
||||
m_disc_ready = false;
|
||||
|
||||
if (sessID != 0) {
|
||||
DeviceIoControl(m_device, IOCTL_DVD_END_SESSION, &sessID, sizeof(DVD_SESSION_ID), NULL, 0, &size, NULL);
|
||||
sessID = 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (sessID == 0) {
|
||||
DeviceIoControl(m_device, IOCTL_DVD_START_SESSION, NULL, 0, &sessID, sizeof(DVD_SESSION_ID), &size, NULL);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue