mirror of https://github.com/stenzek/duckstation
Merge pull request #2441 from stenzek/cd-image-device
CDImage: Add CD-ROM device implementationpull/2444/head
Connor McLaughlin
4 years ago
committed by
GitHub
commit
b62ed5561c
@ -0,0 +1,548 @@
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#include "assert.h"
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#include "cd_image.h"
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#include "error.h"
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#include "log.h"
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#include "string_util.h"
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#include <algorithm>
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#include <cerrno>
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#include <cinttypes>
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#include <cmath>
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Log_SetChannel(CDImageDevice);
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enum : u32
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{
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MAX_TRACK_NUMBER = 99,
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ALL_SUBCODE_SIZE = 96,
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};
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static u32 BEToU32(const u8* val)
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{
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return (static_cast<u32>(val[0]) << 24) | (static_cast<u32>(val[1]) << 16) | (static_cast<u32>(val[2]) << 8) |
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static_cast<u32>(val[3]);
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}
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static void U16ToBE(u8* beval, u16 leval)
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{
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beval[0] = static_cast<u8>(leval >> 8);
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beval[1] = static_cast<u8>(leval);
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}
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// Adapted from
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// https://github.com/saramibreak/DiscImageCreator/blob/5a8fe21730872d67991211f1319c87f0780f2d0f/DiscImageCreator/convert.cpp
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static void DeinterleaveSubcode(const u8* subcode_in, u8* subcode_out)
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{
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std::memset(subcode_out, 0, ALL_SUBCODE_SIZE);
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int row = 0;
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for (int bitNum = 0; bitNum < 8; bitNum++)
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{
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for (int nColumn = 0; nColumn < ALL_SUBCODE_SIZE; row++)
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{
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u32 mask = 0x80;
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for (int nShift = 0; nShift < 8; nShift++, nColumn++)
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{
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const int n = nShift - bitNum;
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if (n > 0)
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{
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subcode_out[row] |= static_cast<u8>((subcode_in[nColumn] >> n) & mask);
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}
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else
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{
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subcode_out[row] |= static_cast<u8>((subcode_in[nColumn] << std::abs(n)) & mask);
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}
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mask >>= 1;
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}
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}
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}
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}
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#if defined(_WIN32) && !defined(_UWP)
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// The include order here is critical.
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// clang-format off
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#include "windows_headers.h"
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#include <winioctl.h>
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#include <ntddcdrm.h>
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#include <ntddscsi.h>
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// clang-format on
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class CDImageDeviceWin32 : public CDImage
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{
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public:
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CDImageDeviceWin32();
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~CDImageDeviceWin32() override;
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bool Open(const char* filename, Common::Error* error);
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bool ReadSubChannelQ(SubChannelQ* subq, const Index& index, LBA lba_in_index) override;
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bool HasNonStandardSubchannel() const override;
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protected:
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bool ReadSectorFromIndex(void* buffer, const Index& index, LBA lba_in_index) override;
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private:
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struct SPTDBuffer
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{
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SCSI_PASS_THROUGH_DIRECT cmd;
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u8 sense[20];
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};
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static void FillSPTD(SPTDBuffer* sptd, u32 sector_number, bool include_subq, void* buffer);
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bool ReadSectorToBuffer(u64 offset);
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bool DetermineReadMode();
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HANDLE m_hDevice = INVALID_HANDLE_VALUE;
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u64 m_buffer_offset = ~static_cast<u64>(0);
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bool m_use_sptd = true;
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bool m_read_subcode = false;
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std::array<u8, CD_RAW_SECTOR_WITH_SUBCODE_SIZE> m_buffer;
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std::array<u8, ALL_SUBCODE_SIZE> m_deinterleaved_subcode;
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std::array<u8, SUBCHANNEL_BYTES_PER_FRAME> m_subq;
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};
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CDImageDeviceWin32::CDImageDeviceWin32() = default;
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CDImageDeviceWin32::~CDImageDeviceWin32()
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{
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if (m_hDevice != INVALID_HANDLE_VALUE)
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CloseHandle(m_hDevice);
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}
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bool CDImageDeviceWin32::Open(const char* filename, Common::Error* error)
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{
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m_filename = filename;
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m_hDevice = CreateFile(filename, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, nullptr,
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OPEN_EXISTING, 0, NULL);
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if (m_hDevice == INVALID_HANDLE_VALUE)
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{
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m_hDevice = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, NULL);
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if (m_hDevice != INVALID_HANDLE_VALUE)
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{
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m_use_sptd = false;
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}
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else
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{
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Log_ErrorPrintf("CreateFile('%s') failed: %08X", filename, GetLastError());
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if (error)
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error->SetWin32(GetLastError());
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return false;
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}
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}
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// Set it to 4x speed. A good balance between readahead and spinning up way too high.
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static constexpr u32 READ_SPEED_MULTIPLIER = 4;
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static constexpr u32 READ_SPEED_KBS = (DATA_SECTOR_SIZE * FRAMES_PER_SECOND * 8) / 1024;
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CDROM_SET_SPEED set_speed = {CdromSetSpeed, READ_SPEED_KBS, 0, CdromDefaultRotation};
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if (!DeviceIoControl(m_hDevice, IOCTL_CDROM_SET_SPEED, &set_speed, sizeof(set_speed), nullptr, 0, nullptr, nullptr))
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Log_WarningPrintf("DeviceIoControl(IOCTL_CDROM_SET_SPEED) failed: %08X", GetLastError());
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CDROM_READ_TOC_EX read_toc_ex = {};
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read_toc_ex.Format = CDROM_READ_TOC_EX_FORMAT_TOC;
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read_toc_ex.Msf = 0;
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read_toc_ex.SessionTrack = 1;
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CDROM_TOC toc = {};
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U16ToBE(toc.Length, sizeof(toc) - sizeof(UCHAR) * 2);
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DWORD bytes_returned;
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if (!DeviceIoControl(m_hDevice, IOCTL_CDROM_READ_TOC_EX, &read_toc_ex, sizeof(read_toc_ex), &toc, sizeof(toc),
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&bytes_returned, nullptr) ||
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toc.LastTrack < toc.FirstTrack)
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{
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Log_ErrorPrintf("DeviceIoCtl(IOCTL_CDROM_READ_TOC_EX) failed: %08X", GetLastError());
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if (error)
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error->SetWin32(GetLastError());
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return false;
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}
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DWORD last_track_address = 0;
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LBA disc_lba = 0;
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Log_DevPrintf("FirstTrack=%u, LastTrack=%u", toc.FirstTrack, toc.LastTrack);
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const u32 num_tracks_to_check = (toc.LastTrack - toc.FirstTrack) + 1 + 1;
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for (u32 track_index = 0; track_index < num_tracks_to_check; track_index++)
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{
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const TRACK_DATA& td = toc.TrackData[track_index];
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const u8 track_num = td.TrackNumber;
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const DWORD track_address = BEToU32(td.Address);
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Log_DevPrintf(" [%u]: Num=%02X, Address=%u", track_index, track_num, track_address);
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// fill in the previous track's length
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if (!m_tracks.empty())
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{
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if (track_num < m_tracks.back().track_number)
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{
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Log_ErrorPrintf("Invalid TOC, track %u less than %u", track_num, m_tracks.back().track_number);
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return false;
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}
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const LBA previous_track_length = static_cast<LBA>(track_address - last_track_address);
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m_tracks.back().length += previous_track_length;
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m_indices.back().length += previous_track_length;
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disc_lba += previous_track_length;
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}
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if (track_num == LEAD_OUT_TRACK_NUMBER)
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{
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AddLeadOutIndex();
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break;
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}
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// precompute subchannel q flags for the whole track
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SubChannelQ::Control control{};
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control.bits = td.Adr | (td.Control << 4);
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const LBA track_lba = static_cast<LBA>(track_address);
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const TrackMode track_mode = control.data ? CDImage::TrackMode::Mode2Raw : CDImage::TrackMode::Audio;
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// TODO: How the hell do we handle pregaps here?
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const u32 pregap_frames =
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(track_num <= MAX_TRACK_NUMBER && ((control.data && track_index == 0) || (!control.data && track_index != 0))) ?
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150 :
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0;
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if (pregap_frames > 0)
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{
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Index pregap_index = {};
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pregap_index.start_lba_on_disc = disc_lba;
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pregap_index.start_lba_in_track = static_cast<LBA>(-static_cast<s32>(pregap_frames));
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pregap_index.length = pregap_frames;
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pregap_index.track_number = track_num;
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pregap_index.index_number = 0;
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pregap_index.mode = track_mode;
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pregap_index.control.bits = control.bits;
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pregap_index.is_pregap = true;
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m_indices.push_back(pregap_index);
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disc_lba += pregap_frames;
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}
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// index 1, will be filled in next iteration
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if (track_num <= MAX_TRACK_NUMBER)
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{
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// add the track itself
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m_tracks.push_back(Track{track_num, disc_lba, static_cast<u32>(m_indices.size()), 0, track_mode, control});
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Index index1;
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index1.start_lba_on_disc = disc_lba;
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index1.start_lba_in_track = 0;
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index1.length = 0;
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index1.track_number = track_num;
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index1.index_number = 1;
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index1.file_index = 0;
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index1.file_sector_size = 2048;
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index1.file_offset = static_cast<u64>(track_address) * index1.file_sector_size;
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index1.mode = track_mode;
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index1.control.bits = control.bits;
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index1.is_pregap = false;
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m_indices.push_back(index1);
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}
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}
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if (m_tracks.empty())
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{
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Log_ErrorPrintf("File '%s' contains no tracks", filename);
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if (error)
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error->SetFormattedMessage("File '%s' contains no tracks", filename);
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return false;
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}
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m_lba_count = disc_lba;
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Log_DevPrintf("%u tracks, %u indices, %u lbas", static_cast<u32>(m_tracks.size()), static_cast<u32>(m_indices.size()),
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static_cast<u32>(m_lba_count));
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for (u32 i = 0; i < m_tracks.size(); i++)
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{
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Log_DevPrintf(" Track %u: Start %u, length %u, mode %u, control 0x%02X", i,
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static_cast<u32>(m_tracks[i].track_number), static_cast<u32>(m_tracks[i].start_lba),
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static_cast<u32>(m_tracks[i].mode), static_cast<u32>(m_tracks[i].control.bits));
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}
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for (u32 i = 0; i < m_indices.size(); i++)
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{
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Log_DevPrintf(" Index %u: Track %u, Index %u, Start %u, length %u, file sector size %u, file offset %" PRIu64, i,
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static_cast<u32>(m_indices[i].track_number), static_cast<u32>(m_indices[i].index_number),
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static_cast<u32>(m_indices[i].start_lba_on_disc), static_cast<u32>(m_indices[i].length),
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static_cast<u32>(m_indices[i].file_sector_size), m_indices[i].file_offset);
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}
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if (!DetermineReadMode())
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{
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Log_ErrorPrintf("Could not determine read mode");
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if (error)
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error->SetMessage("Could not determine read mode");
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return false;
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}
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return Seek(1, Position{0, 0, 0});
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}
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bool CDImageDeviceWin32::ReadSubChannelQ(SubChannelQ* subq, const Index& index, LBA lba_in_index)
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{
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if (index.file_sector_size == 0 || !m_read_subcode)
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return CDImage::ReadSubChannelQ(subq, index, lba_in_index);
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const u64 offset = index.file_offset + static_cast<u64>(lba_in_index) * index.file_sector_size;
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if (m_buffer_offset != offset && !ReadSectorToBuffer(offset))
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return false;
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// P, Q, ...
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std::memcpy(subq->data.data(), m_subq.data(), SUBCHANNEL_BYTES_PER_FRAME);
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return true;
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}
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bool CDImageDeviceWin32::HasNonStandardSubchannel() const
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{
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return true;
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}
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bool CDImageDeviceWin32::ReadSectorFromIndex(void* buffer, const Index& index, LBA lba_in_index)
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{
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if (index.file_sector_size == 0)
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return false;
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const u64 offset = index.file_offset + static_cast<u64>(lba_in_index) * index.file_sector_size;
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if (m_buffer_offset != offset && !ReadSectorToBuffer(offset))
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return false;
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std::memcpy(buffer, m_buffer.data(), RAW_SECTOR_SIZE);
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return true;
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}
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void CDImageDeviceWin32::FillSPTD(SPTDBuffer* sptd, u32 sector_number, bool include_subq, void* buffer)
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{
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std::memset(sptd, 0, sizeof(SPTDBuffer));
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sptd->cmd.Length = sizeof(sptd->cmd);
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sptd->cmd.CdbLength = 12;
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sptd->cmd.SenseInfoLength = sizeof(sptd->sense);
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sptd->cmd.DataIn = SCSI_IOCTL_DATA_IN;
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sptd->cmd.DataTransferLength = include_subq ? (RAW_SECTOR_SIZE + SUBCHANNEL_BYTES_PER_FRAME) : RAW_SECTOR_SIZE;
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sptd->cmd.TimeOutValue = 10;
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sptd->cmd.SenseInfoOffset = offsetof(SPTDBuffer, sense);
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sptd->cmd.DataBuffer = buffer;
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sptd->cmd.Cdb[0] = 0xBE; // READ CD
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sptd->cmd.Cdb[1] = 0x00; // sector type
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sptd->cmd.Cdb[2] = Truncate8(sector_number >> 24); // Starting LBA
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sptd->cmd.Cdb[3] = Truncate8(sector_number >> 16);
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sptd->cmd.Cdb[4] = Truncate8(sector_number >> 8);
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sptd->cmd.Cdb[5] = Truncate8(sector_number);
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sptd->cmd.Cdb[6] = 0x00; // Transfer Count
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sptd->cmd.Cdb[7] = 0x00;
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sptd->cmd.Cdb[8] = 0x01;
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sptd->cmd.Cdb[9] = (1 << 7) | // include sync
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(0b11 << 5) | // include header codes
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(1 << 4) | // include user data
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(1 << 3) | // edc/ecc
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(0 << 2); // don't include C2 data
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sptd->cmd.Cdb[10] = (include_subq ? (0b010 << 0) : (0b000 << 0)); // subq selection
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}
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bool CDImageDeviceWin32::ReadSectorToBuffer(u64 offset)
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{
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if (m_use_sptd)
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{
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const u32 sector_number = static_cast<u32>(offset / 2048);
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SPTDBuffer sptd = {};
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FillSPTD(&sptd, sector_number, m_read_subcode, m_buffer.data());
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const u32 expected_bytes = sptd.cmd.DataTransferLength;
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DWORD bytes_returned;
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if (!DeviceIoControl(m_hDevice, IOCTL_SCSI_PASS_THROUGH_DIRECT, &sptd, sizeof(sptd), &sptd, sizeof(sptd),
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&bytes_returned, nullptr) &&
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sptd.cmd.ScsiStatus == 0x00)
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{
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Log_ErrorPrintf("DeviceIoControl(IOCTL_SCSI_PASS_THROUGH_DIRECT) for offset %" PRIu64
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" failed: %08X Status 0x%02X",
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offset, GetLastError(), sptd.cmd.ScsiStatus);
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return false;
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}
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if (sptd.cmd.DataTransferLength != expected_bytes)
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Log_WarningPrintf("Only read %u of %u bytes", static_cast<u32>(sptd.cmd.DataTransferLength), expected_bytes);
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if (m_read_subcode)
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std::memcpy(m_subq.data(), &m_buffer[RAW_SECTOR_SIZE], SUBCHANNEL_BYTES_PER_FRAME);
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}
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else
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{
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RAW_READ_INFO rri;
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rri.DiskOffset.QuadPart = offset;
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rri.SectorCount = 1;
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rri.TrackMode = RawWithSubCode;
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DWORD bytes_returned;
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if (!DeviceIoControl(m_hDevice, IOCTL_CDROM_RAW_READ, &rri, sizeof(rri), m_buffer.data(),
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static_cast<DWORD>(m_buffer.size()), &bytes_returned, nullptr))
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{
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Log_ErrorPrintf("DeviceIoControl(IOCTL_CDROM_RAW_READ) for offset %" PRIu64 " failed: %08X", offset,
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GetLastError());
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return false;
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}
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if (bytes_returned != m_buffer.size())
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Log_WarningPrintf("Only read %u of %u bytes", bytes_returned, static_cast<unsigned>(m_buffer.size()));
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// P, Q, ...
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DeinterleaveSubcode(&m_buffer[RAW_SECTOR_SIZE], m_deinterleaved_subcode.data());
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std::memcpy(m_subq.data(), &m_deinterleaved_subcode[SUBCHANNEL_BYTES_PER_FRAME], SUBCHANNEL_BYTES_PER_FRAME);
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}
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m_buffer_offset = offset;
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return true;
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}
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bool CDImageDeviceWin32::DetermineReadMode()
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{
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// Prefer raw reads if we can use them
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RAW_READ_INFO rri;
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rri.DiskOffset.QuadPart = 0;
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rri.SectorCount = 1;
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rri.TrackMode = RawWithSubCode;
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DWORD bytes_returned;
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if (DeviceIoControl(m_hDevice, IOCTL_CDROM_RAW_READ, &rri, sizeof(rri), m_buffer.data(),
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static_cast<DWORD>(m_buffer.size()), &bytes_returned, nullptr) &&
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bytes_returned == CD_RAW_SECTOR_WITH_SUBCODE_SIZE)
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{
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SubChannelQ subq;
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DeinterleaveSubcode(&m_buffer[RAW_SECTOR_SIZE], m_deinterleaved_subcode.data());
|
||||
std::memcpy(&subq, &m_deinterleaved_subcode[SUBCHANNEL_BYTES_PER_FRAME], SUBCHANNEL_BYTES_PER_FRAME);
|
||||
|
||||
m_use_sptd = false;
|
||||
m_read_subcode = true;
|
||||
|
||||
if (subq.IsCRCValid())
|
||||
{
|
||||
Log_DevPrintf("Raw read returned invalid SubQ CRC (got %02X expected %02X)", static_cast<unsigned>(subq.crc),
|
||||
static_cast<unsigned>(SubChannelQ::ComputeCRC(subq.data)));
|
||||
|
||||
m_read_subcode = false;
|
||||
}
|
||||
else
|
||||
{
|
||||
Log_DevPrintf("Using raw reads with subcode");
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
Log_DevPrintf("DeviceIoControl(IOCTL_CDROM_RAW_READ) failed: %08X, %u bytes returned, trying SPTD", GetLastError(),
|
||||
bytes_returned);
|
||||
|
||||
SPTDBuffer sptd = {};
|
||||
FillSPTD(&sptd, 0, true, m_buffer.data());
|
||||
|
||||
if (DeviceIoControl(m_hDevice, IOCTL_SCSI_PASS_THROUGH_DIRECT, &sptd, sizeof(sptd), &sptd, sizeof(sptd),
|
||||
&bytes_returned, nullptr) &&
|
||||
sptd.cmd.ScsiStatus == 0x00)
|
||||
{
|
||||
// check the validity of the subchannel data. this assumes that the first sector has a valid subq, which it should
|
||||
// in all PS1 games.
|
||||
SubChannelQ subq;
|
||||
std::memcpy(&subq, &m_buffer[RAW_SECTOR_SIZE], sizeof(subq));
|
||||
if (subq.IsCRCValid())
|
||||
{
|
||||
Log_DevPrintf("Using SPTD reads with subq (%u, status 0x%02X)", sptd.cmd.DataTransferLength, sptd.cmd.ScsiStatus);
|
||||
m_read_subcode = true;
|
||||
m_use_sptd = true;
|
||||
return true;
|
||||
}
|
||||
else
|
||||
{
|
||||
Log_DevPrintf("SPTD read returned invalid SubQ CRC (got %02X expected %02X)", static_cast<unsigned>(subq.crc),
|
||||
static_cast<unsigned>(SubChannelQ::ComputeCRC(subq.data)));
|
||||
}
|
||||
}
|
||||
|
||||
// try without subcode
|
||||
FillSPTD(&sptd, 0, false, m_buffer.data());
|
||||
if (DeviceIoControl(m_hDevice, IOCTL_SCSI_PASS_THROUGH_DIRECT, &sptd, sizeof(sptd), &sptd, sizeof(sptd),
|
||||
&bytes_returned, nullptr) &&
|
||||
sptd.cmd.ScsiStatus == 0x00)
|
||||
{
|
||||
Log_DevPrintf("Using SPTD reads without subq (%u, status 0x%02X)", sptd.cmd.DataTransferLength,
|
||||
sptd.cmd.ScsiStatus);
|
||||
m_read_subcode = false;
|
||||
m_use_sptd = true;
|
||||
return true;
|
||||
}
|
||||
|
||||
Log_ErrorPrintf("No working read mode found (status 0x%02X, err %08X)", sptd.cmd.ScsiStatus, GetLastError());
|
||||
return false;
|
||||
}
|
||||
|
||||
std::unique_ptr<CDImage> CDImage::OpenDeviceImage(const char* filename, Common::Error* error)
|
||||
{
|
||||
std::unique_ptr<CDImageDeviceWin32> image = std::make_unique<CDImageDeviceWin32>();
|
||||
if (!image->Open(filename, error))
|
||||
return {};
|
||||
|
||||
return image;
|
||||
}
|
||||
|
||||
std::vector<std::pair<std::string, std::string>> CDImage::GetDeviceList()
|
||||
{
|
||||
std::vector<std::pair<std::string, std::string>> ret;
|
||||
|
||||
char buf[256];
|
||||
if (GetLogicalDriveStringsA(sizeof(buf), buf) != 0)
|
||||
{
|
||||
const char* ptr = buf;
|
||||
while (*ptr != '\0')
|
||||
{
|
||||
std::size_t len = std::strlen(ptr);
|
||||
const DWORD type = GetDriveTypeA(ptr);
|
||||
if (type != DRIVE_CDROM)
|
||||
{
|
||||
ptr += len + 1u;
|
||||
continue;
|
||||
}
|
||||
|
||||
// Drop the trailing slash.
|
||||
const std::size_t append_len = (ptr[len - 1] == '\\') ? (len - 1) : len;
|
||||
|
||||
std::string path;
|
||||
path.append("\\\\.\\");
|
||||
path.append(ptr, append_len);
|
||||
|
||||
std::string name(ptr, append_len);
|
||||
|
||||
ret.emplace_back(std::move(path), std::move(name));
|
||||
|
||||
ptr += len + 1u;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
bool CDImage::IsDeviceName(const char* filename)
|
||||
{
|
||||
return StringUtil::StartsWith(filename, "\\\\.\\");
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
std::unique_ptr<CDImage> CDImage::OpenDeviceImage(const char* filename, Common::Error* error)
|
||||
{
|
||||
return {};
|
||||
}
|
||||
|
||||
std::vector<std::pair<std::string, std::string>> CDImage::GetDeviceList()
|
||||
{
|
||||
return {};
|
||||
}
|
||||
|
||||
bool CDImage::IsDeviceName(const char* filename)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue