mirror of
https://github.com/TomHarte/CLK.git
synced 2024-11-26 23:52:26 +00:00
Merge branch '68000Mk2' of github.com:TomHarte/CLK into 68000Mk2
This commit is contained in:
Thomas Harte
commit
6cb559f65e
@ -43,11 +43,12 @@
|
||||
#include "../../Storage/Disk/DiskImage/Formats/AppleDSK.hpp"
|
||||
#include "../../Storage/Disk/DiskImage/Formats/CPCDSK.hpp"
|
||||
#include "../../Storage/Disk/DiskImage/Formats/D64.hpp"
|
||||
#include "../../Storage/Disk/DiskImage/Formats/MacintoshIMG.hpp"
|
||||
#include "../../Storage/Disk/DiskImage/Formats/G64.hpp"
|
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#include "../../Storage/Disk/DiskImage/Formats/DMK.hpp"
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#include "../../Storage/Disk/DiskImage/Formats/FAT12.hpp"
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#include "../../Storage/Disk/DiskImage/Formats/HFE.hpp"
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#include "../../Storage/Disk/DiskImage/Formats/IPF.hpp"
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#include "../../Storage/Disk/DiskImage/Formats/MacintoshIMG.hpp"
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#include "../../Storage/Disk/DiskImage/Formats/MSA.hpp"
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#include "../../Storage/Disk/DiskImage/Formats/NIB.hpp"
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#include "../../Storage/Disk/DiskImage/Formats/OricMFMDSK.hpp"
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@ -103,8 +104,8 @@ static Media GetMediaAndPlatforms(const std::string &file_name, TargetPlatform::
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#define InsertInstance(list, instance, platforms) \
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list.emplace_back(instance);\
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potential_platforms |= platforms;\
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TargetPlatform::TypeDistinguisher *distinguisher = dynamic_cast<TargetPlatform::TypeDistinguisher *>(list.back().get());\
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if(distinguisher) potential_platforms &= distinguisher->target_platform_type(); \
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TargetPlatform::TypeDistinguisher *const distinguisher = dynamic_cast<TargetPlatform::TypeDistinguisher *>(list.back().get());\
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if(distinguisher) potential_platforms &= distinguisher->target_platform_type();
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#define Insert(list, class, platforms, ...) \
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InsertInstance(list, new Storage::class(__VA_ARGS__), platforms);
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@ -162,6 +163,10 @@ static Media GetMediaAndPlatforms(const std::string &file_name, TargetPlatform::
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Format("img", result.disks, Disk::DiskImageHolder<Storage::Disk::MacintoshIMG>, TargetPlatform::Macintosh) // IMG (DiskCopy 4.2)
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Format("image", result.disks, Disk::DiskImageHolder<Storage::Disk::MacintoshIMG>, TargetPlatform::Macintosh) // IMG (DiskCopy 4.2)
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Format("img", result.disks, Disk::DiskImageHolder<Storage::Disk::FAT12>, TargetPlatform::Enterprise) // IMG (Enterprise/MS-DOS style)
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Format( "ipf",
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result.disks,
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Disk::DiskImageHolder<Storage::Disk::IPF>,
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TargetPlatform::Amiga | TargetPlatform::AtariST | TargetPlatform::AmstradCPC | TargetPlatform::ZXSpectrum) // IPF
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Format("msa", result.disks, Disk::DiskImageHolder<Storage::Disk::MSA>, TargetPlatform::AtariST) // MSA
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Format("nib", result.disks, Disk::DiskImageHolder<Storage::Disk::NIB>, TargetPlatform::DiskII) // NIB
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Format("o", result.tapes, Tape::ZX80O81P, TargetPlatform::ZX8081) // O
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@ -12,17 +12,13 @@ using namespace Concurrency;
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|
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AsyncTaskQueue::AsyncTaskQueue()
|
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#ifndef USE_GCD
|
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: should_destruct_(false)
|
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#endif
|
||||
{
|
||||
#ifdef USE_GCD
|
||||
serial_dispatch_queue_ = dispatch_queue_create("com.thomasharte.clocksignal.asyntaskqueue", DISPATCH_QUEUE_SERIAL);
|
||||
#else
|
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thread_ = std::make_unique<std::thread>([this]() {
|
||||
:
|
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should_destruct_(false),
|
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thread_([this] () {
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while(!should_destruct_) {
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std::function<void(void)> next_function;
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|
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// Take lock, check for a new task
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// Take lock, check for a new task.
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std::unique_lock lock(queue_mutex_);
|
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if(!pending_tasks_.empty()) {
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next_function = pending_tasks_.front();
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@ -30,29 +26,33 @@ AsyncTaskQueue::AsyncTaskQueue()
|
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}
|
||||
|
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if(next_function) {
|
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// If there is a task, release lock and perform it
|
||||
// If there is a task, release lock and perform it.
|
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lock.unlock();
|
||||
next_function();
|
||||
} else {
|
||||
// If there isn't a task, atomically block on the processing condition and release the lock
|
||||
// until there's something pending (and then release it again via scope)
|
||||
// until there's something pending (and then release it again via scope).
|
||||
processing_condition_.wait(lock);
|
||||
}
|
||||
}
|
||||
});
|
||||
})
|
||||
#else
|
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: serial_dispatch_queue_(dispatch_queue_create("com.thomasharte.clocksignal.asyntaskqueue", DISPATCH_QUEUE_SERIAL))
|
||||
#endif
|
||||
}
|
||||
{}
|
||||
|
||||
AsyncTaskQueue::~AsyncTaskQueue() {
|
||||
#ifdef USE_GCD
|
||||
flush();
|
||||
dispatch_release(serial_dispatch_queue_);
|
||||
serial_dispatch_queue_ = nullptr;
|
||||
#else
|
||||
// Set should destruct, and then give the thread a bit of a nudge
|
||||
// via an empty enqueue.
|
||||
should_destruct_ = true;
|
||||
enqueue([](){});
|
||||
thread_->join();
|
||||
thread_.reset();
|
||||
|
||||
// Wait for the thread safely to terminate.
|
||||
thread_.join();
|
||||
#endif
|
||||
}
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||||
|
||||
@ -88,18 +88,22 @@ DeferringAsyncTaskQueue::~DeferringAsyncTaskQueue() {
|
||||
|
||||
void DeferringAsyncTaskQueue::defer(std::function<void(void)> function) {
|
||||
if(!deferred_tasks_) {
|
||||
deferred_tasks_ = std::make_shared<std::list<std::function<void(void)>>>();
|
||||
deferred_tasks_ = std::make_unique<TaskList>();
|
||||
}
|
||||
deferred_tasks_->push_back(function);
|
||||
}
|
||||
|
||||
void DeferringAsyncTaskQueue::perform() {
|
||||
if(!deferred_tasks_) return;
|
||||
std::shared_ptr<std::list<std::function<void(void)>>> deferred_tasks = deferred_tasks_;
|
||||
deferred_tasks_.reset();
|
||||
enqueue([deferred_tasks] {
|
||||
enqueue([deferred_tasks_raw = deferred_tasks_.release()] {
|
||||
std::unique_ptr<TaskList> deferred_tasks(deferred_tasks_raw);
|
||||
for(const auto &function : *deferred_tasks) {
|
||||
function();
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
void DeferringAsyncTaskQueue::flush() {
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||||
perform();
|
||||
AsyncTaskQueue::flush();
|
||||
}
|
||||
|
||||
@ -23,6 +23,8 @@
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||||
|
||||
namespace Concurrency {
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||||
|
||||
using TaskList = std::list<std::function<void(void)>>;
|
||||
|
||||
/*!
|
||||
An async task queue allows a caller to enqueue void(void) functions. Those functions are guaranteed
|
||||
to be performed serially and asynchronously from the caller. A caller may also request to flush,
|
||||
@ -51,12 +53,12 @@ class AsyncTaskQueue {
|
||||
#ifdef USE_GCD
|
||||
dispatch_queue_t serial_dispatch_queue_;
|
||||
#else
|
||||
std::unique_ptr<std::thread> thread_;
|
||||
|
||||
std::mutex queue_mutex_;
|
||||
std::list<std::function<void(void)>> pending_tasks_;
|
||||
std::condition_variable processing_condition_;
|
||||
std::atomic_bool should_destruct_;
|
||||
std::condition_variable processing_condition_;
|
||||
std::mutex queue_mutex_;
|
||||
TaskList pending_tasks_;
|
||||
|
||||
std::thread thread_;
|
||||
#endif
|
||||
};
|
||||
|
||||
@ -87,10 +89,13 @@ class DeferringAsyncTaskQueue: public AsyncTaskQueue {
|
||||
*/
|
||||
void perform();
|
||||
|
||||
/*!
|
||||
Blocks the caller until all previously-enqueud functions have completed.
|
||||
*/
|
||||
void flush();
|
||||
|
||||
private:
|
||||
// TODO: this is a shared_ptr because of the issues capturing moveables in C++11;
|
||||
// switch to a unique_ptr if/when adapting to C++14
|
||||
std::shared_ptr<std::list<std::function<void(void)>>> deferred_tasks_;
|
||||
std::unique_ptr<TaskList> deferred_tasks_;
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
@ -276,6 +276,8 @@
|
||||
4B59199C1DAC6C46005BB85C /* OricTAP.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B59199A1DAC6C46005BB85C /* OricTAP.cpp */; };
|
||||
4B595FAD2086DFBA0083CAA8 /* AudioToggle.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B595FAC2086DFBA0083CAA8 /* AudioToggle.cpp */; };
|
||||
4B595FAE2086DFBA0083CAA8 /* AudioToggle.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B595FAC2086DFBA0083CAA8 /* AudioToggle.cpp */; };
|
||||
4B5B37312777C7FC0047F238 /* IPF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B5B372F2777C7FC0047F238 /* IPF.cpp */; };
|
||||
4B5B37322777C7FC0047F238 /* IPF.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B5B372F2777C7FC0047F238 /* IPF.cpp */; };
|
||||
4B5D5C9725F56FC7001B4623 /* Spectrum.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B5D5C9525F56FC7001B4623 /* Spectrum.cpp */; };
|
||||
4B5D5C9825F56FC7001B4623 /* Spectrum.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B5D5C9525F56FC7001B4623 /* Spectrum.cpp */; };
|
||||
4B5FADBA1DE3151600AEC565 /* FileHolder.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 4B5FADB81DE3151600AEC565 /* FileHolder.cpp */; };
|
||||
@ -1393,6 +1395,8 @@
|
||||
4B59199B1DAC6C46005BB85C /* OricTAP.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = OricTAP.hpp; sourceTree = "<group>"; };
|
||||
4B595FAB2086DFBA0083CAA8 /* AudioToggle.hpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.h; path = AudioToggle.hpp; sourceTree = "<group>"; };
|
||||
4B595FAC2086DFBA0083CAA8 /* AudioToggle.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AudioToggle.cpp; sourceTree = "<group>"; };
|
||||
4B5B372F2777C7FC0047F238 /* IPF.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = IPF.cpp; sourceTree = "<group>"; };
|
||||
4B5B37302777C7FC0047F238 /* IPF.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = IPF.hpp; sourceTree = "<group>"; };
|
||||
4B5D5C9525F56FC7001B4623 /* Spectrum.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; name = Spectrum.cpp; path = Parsers/Spectrum.cpp; sourceTree = "<group>"; };
|
||||
4B5D5C9625F56FC7001B4623 /* Spectrum.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; name = Spectrum.hpp; path = Parsers/Spectrum.hpp; sourceTree = "<group>"; };
|
||||
4B5FADB81DE3151600AEC565 /* FileHolder.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = FileHolder.cpp; sourceTree = "<group>"; };
|
||||
@ -2859,6 +2863,7 @@
|
||||
4BEBFB4B2002C4BF000708CC /* FAT12.cpp */,
|
||||
4B4518931F75FD1B00926311 /* G64.cpp */,
|
||||
4B4518951F75FD1B00926311 /* HFE.cpp */,
|
||||
4B5B372F2777C7FC0047F238 /* IPF.cpp */,
|
||||
4BB4BFAE22A42F290069048D /* MacintoshIMG.cpp */,
|
||||
4B58601C1F806AB200AEE2E3 /* MFMSectorDump.cpp */,
|
||||
4BC131782346DF2B00E4FF3D /* MSA.cpp */,
|
||||
@ -2878,6 +2883,7 @@
|
||||
4BEBFB4C2002C4BF000708CC /* FAT12.hpp */,
|
||||
4B4518941F75FD1B00926311 /* G64.hpp */,
|
||||
4B4518961F75FD1B00926311 /* HFE.hpp */,
|
||||
4B5B37302777C7FC0047F238 /* IPF.hpp */,
|
||||
4BB4BFAF22A42F290069048D /* MacintoshIMG.hpp */,
|
||||
4B58601D1F806AB200AEE2E3 /* MFMSectorDump.hpp */,
|
||||
4BC131792346DF2B00E4FF3D /* MSA.hpp */,
|
||||
@ -5550,6 +5556,7 @@
|
||||
4B7962A22819681F008130F9 /* Decoder.cpp in Sources */,
|
||||
4B055ACF1FAE9B030060FFFF /* SoundGenerator.cpp in Sources */,
|
||||
4B4DEC08252BFA56004583AC /* 65816Base.cpp in Sources */,
|
||||
4B5B37322777C7FC0047F238 /* IPF.cpp in Sources */,
|
||||
4B894519201967B4007DE474 /* ConfidenceCounter.cpp in Sources */,
|
||||
4B055AEE1FAE9BBF0060FFFF /* Keyboard.cpp in Sources */,
|
||||
4B055AED1FAE9BA20060FFFF /* Z80Storage.cpp in Sources */,
|
||||
@ -5704,6 +5711,7 @@
|
||||
4B89451E201967B4007DE474 /* Tape.cpp in Sources */,
|
||||
4BAF2B4E2004580C00480230 /* DMK.cpp in Sources */,
|
||||
4BB697CE1D4BA44400248BDF /* CommodoreGCR.cpp in Sources */,
|
||||
4B5B37312777C7FC0047F238 /* IPF.cpp in Sources */,
|
||||
4B0ACC3023775819008902D0 /* TIASound.cpp in Sources */,
|
||||
4B7136861F78724F008B8ED9 /* Encoder.cpp in Sources */,
|
||||
4B0E04EA1FC9E5DA00F43484 /* CAS.cpp in Sources */,
|
||||
|
||||
@ -652,6 +652,26 @@
|
||||
<key>NSDocumentClass</key>
|
||||
<string>$(PRODUCT_MODULE_NAME).MachineDocument</string>
|
||||
</dict>
|
||||
<dict>
|
||||
<key>CFBundleTypeExtensions</key>
|
||||
<array>
|
||||
<string>ipf</string>
|
||||
</array>
|
||||
<key>CFBundleTypeName</key>
|
||||
<string>Software Preservation Society Disk Image</string>
|
||||
<key>CFBundleTypeOSTypes</key>
|
||||
<array>
|
||||
<string>????</string>
|
||||
</array>
|
||||
<key>CFBundleTypeRole</key>
|
||||
<string>Viewer</string>
|
||||
<key>LSHandlerRank</key>
|
||||
<string>Owner</string>
|
||||
<key>LSTypeIsPackage</key>
|
||||
<false/>
|
||||
<key>NSDocumentClass</key>
|
||||
<string>$(PRODUCT_MODULE_NAME).MachineDocument</string>
|
||||
</dict>
|
||||
</array>
|
||||
<key>CFBundleExecutable</key>
|
||||
<string>$(EXECUTABLE_NAME)</string>
|
||||
|
||||
@ -870,7 +870,16 @@
|
||||
XCTAssertEqual(state.registers.data[1], 0x1fffffff);
|
||||
XCTAssertEqual(state.registers.supervisor_stack_pointer, initial_sp - 6);
|
||||
XCTAssertEqual(state.registers.status & ConditionCode::AllConditions, ConditionCode::Extend);
|
||||
XCTAssertEqual(44, self.machine->get_cycle_count());
|
||||
|
||||
// Total expected bus pattern:
|
||||
//
|
||||
// np | nn nn | nw nw nw np np np n np = 42 cycles
|
||||
//
|
||||
// Noted: Yacht shows a total of three nps for a DIVS #;
|
||||
// I believe this is incorrect as it includes two in the
|
||||
// '1st op (ea)' stage, but an immediate word causes
|
||||
// only one elsewhere.
|
||||
XCTAssertEqual(42, self.machine->get_cycle_count());
|
||||
|
||||
// Check stack contents; should be PC.l, PC.h and status register.
|
||||
// Assumed: the program counter on the stack is that of the
|
||||
@ -908,7 +917,11 @@
|
||||
|
||||
const auto state = self.machine->get_processor_state();
|
||||
XCTAssertEqual(state.registers.data[1], 0x4768f231);
|
||||
XCTAssertEqual(state.registers.status & ConditionCode::AllConditions, ConditionCode::Extend | ConditionCode::Negative | ConditionCode::Overflow);
|
||||
|
||||
// This test should produce overflow; so don't test N or Z flags.
|
||||
XCTAssertEqual(
|
||||
state.registers.status & (ConditionCode::Carry | ConditionCode::Overflow | ConditionCode::Extend),
|
||||
ConditionCode::Extend | ConditionCode::Overflow);
|
||||
XCTAssertEqual(14, self.machine->get_cycle_count());
|
||||
}
|
||||
|
||||
@ -917,7 +930,10 @@
|
||||
|
||||
const auto state = self.machine->get_processor_state();
|
||||
XCTAssertEqual(state.registers.data[1], 0x4768f231);
|
||||
XCTAssertEqual(state.registers.status & ConditionCode::AllConditions, ConditionCode::Extend | ConditionCode::Negative | ConditionCode::Overflow);
|
||||
// This test should also produce overflow; so don't test N or Z flags.
|
||||
XCTAssertEqual(
|
||||
state.registers.status & (ConditionCode::Carry | ConditionCode::Overflow | ConditionCode::Extend),
|
||||
ConditionCode::Extend | ConditionCode::Overflow);
|
||||
XCTAssertEqual(14, self.machine->get_cycle_count());
|
||||
}
|
||||
|
||||
|
||||
@ -2547,7 +2547,7 @@ template <bool did_overflow> void ProcessorBase::did_divu(uint32_t dividend, uin
|
||||
}
|
||||
|
||||
if(did_overflow) {
|
||||
dynamic_instruction_length_ = 3; // Just a quick nn n, and then on to prefetch.
|
||||
dynamic_instruction_length_ = 3; // Covers the nn n to get into the loop.
|
||||
return;
|
||||
}
|
||||
|
||||
@ -2556,13 +2556,15 @@ template <bool did_overflow> void ProcessorBase::did_divu(uint32_t dividend, uin
|
||||
// since this is a classic divide algorithm, but would rather that
|
||||
// errors produce incorrect timing only, not incorrect timing plus
|
||||
// incorrect results.
|
||||
dynamic_instruction_length_ = 3; // Covers the nn n to get into the loop.
|
||||
dynamic_instruction_length_ =
|
||||
3 + // nn n to get into the loop;
|
||||
30 + // nn per iteration of the loop below;
|
||||
3; // n nn upon completion of the loop.
|
||||
|
||||
divisor <<= 16;
|
||||
for(int c = 0; c < 15; ++c) {
|
||||
if(dividend & 0x80000000) {
|
||||
if(dividend & 0x8000'0000) {
|
||||
dividend = (dividend << 1) - divisor;
|
||||
dynamic_instruction_length_ += 2; // The fixed nn iteration cost.
|
||||
} else {
|
||||
dividend <<= 1;
|
||||
|
||||
@ -2570,9 +2572,9 @@ template <bool did_overflow> void ProcessorBase::did_divu(uint32_t dividend, uin
|
||||
// and test the sign of the result, but this is easier to follow:
|
||||
if (dividend >= divisor) {
|
||||
dividend -= divisor;
|
||||
dynamic_instruction_length_ += 3; // i.e. the original nn plus one further n before going down the MSB=0 route.
|
||||
dynamic_instruction_length_ += 1; // i.e. the original nn plus one further n before going down the MSB=0 route.
|
||||
} else {
|
||||
dynamic_instruction_length_ += 4; // The costliest path (since in real life it's a subtraction and then a step
|
||||
dynamic_instruction_length_ += 2; // The costliest path (since in real life it's a subtraction and then a step
|
||||
// back from there) — all costs accrue. So the fixed nn loop plus another n,
|
||||
// plus another one.
|
||||
}
|
||||
|
||||
@ -14,6 +14,7 @@
|
||||
|
||||
#include "../Disk.hpp"
|
||||
#include "../Track/Track.hpp"
|
||||
#include "../../TargetPlatforms.hpp"
|
||||
|
||||
namespace Storage {
|
||||
namespace Disk {
|
||||
@ -86,8 +87,11 @@ class DiskImageHolderBase: public Disk {
|
||||
Provides a wrapper that wraps a DiskImage to make it into a Disk, providing caching and,
|
||||
thereby, an intermediate store for modified tracks so that mutable disk images can either
|
||||
update on the fly or perform a block update on closure, as appropriate.
|
||||
|
||||
Implements TargetPlatform::TypeDistinguisher to return either no information whatsoever, if
|
||||
the underlying image doesn't implement TypeDistinguisher, or else to pass the call along.
|
||||
*/
|
||||
template <typename T> class DiskImageHolder: public DiskImageHolderBase {
|
||||
template <typename T> class DiskImageHolder: public DiskImageHolderBase, public TargetPlatform::TypeDistinguisher {
|
||||
public:
|
||||
template <typename... Ts> DiskImageHolder(Ts&&... args) :
|
||||
disk_image_(args...) {}
|
||||
@ -103,6 +107,14 @@ template <typename T> class DiskImageHolder: public DiskImageHolderBase {
|
||||
|
||||
private:
|
||||
T disk_image_;
|
||||
|
||||
TargetPlatform::Type target_platform_type() final {
|
||||
if constexpr (std::is_base_of<TargetPlatform::TypeDistinguisher, T>::value) {
|
||||
return static_cast<TargetPlatform::TypeDistinguisher *>(&disk_image_)->target_platform_type();
|
||||
} else {
|
||||
return TargetPlatform::Type(~0);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
#include "DiskImageImplementation.hpp"
|
||||
|
||||
437
Storage/Disk/DiskImage/Formats/IPF.cpp
Normal file
437
Storage/Disk/DiskImage/Formats/IPF.cpp
Normal file
@ -0,0 +1,437 @@
|
||||
//
|
||||
// IPF.cpp
|
||||
// Clock Signal
|
||||
//
|
||||
// Created by Thomas Harte on 25/12/2021.
|
||||
// Copyright © 2021 Thomas Harte. All rights reserved.
|
||||
//
|
||||
|
||||
#include "IPF.hpp"
|
||||
|
||||
#include "../../Encodings/MFM/Encoder.hpp"
|
||||
|
||||
#include <cassert>
|
||||
|
||||
using namespace Storage::Disk;
|
||||
|
||||
namespace {
|
||||
|
||||
constexpr uint32_t block(const char (& src)[5]) {
|
||||
return uint32_t(
|
||||
(uint32_t(src[0]) << 24) |
|
||||
(uint32_t(src[1]) << 16) |
|
||||
(uint32_t(src[2]) << 8) |
|
||||
uint32_t(src[3])
|
||||
);
|
||||
}
|
||||
|
||||
constexpr size_t block_size(Storage::FileHolder &file, uint8_t header) {
|
||||
uint8_t size_width = header >> 5;
|
||||
size_t length = 0;
|
||||
while(size_width--) {
|
||||
length = (length << 8) | file.get8();
|
||||
}
|
||||
return length;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
IPF::IPF(const std::string &file_name) : file_(file_name) {
|
||||
std::map<uint32_t, Track::Address> tracks_by_data_key;
|
||||
|
||||
// For now, just build up a list of tracks that exist, noting the file position at which their data begins
|
||||
// plus the other fields that'll be necessary to convert them into flux on demand later.
|
||||
while(true) {
|
||||
const auto start_of_block = file_.tell();
|
||||
const uint32_t type = file_.get32be();
|
||||
uint32_t length = file_.get32be(); // Can't be const because of the dumb encoding of DATA blocks.
|
||||
[[maybe_unused]] const uint32_t crc = file_.get32be();
|
||||
if(file_.eof()) break;
|
||||
|
||||
// Sanity check: the first thing in a file should be the CAPS record.
|
||||
if(!start_of_block && type != block("CAPS")) {
|
||||
throw Error::InvalidFormat;
|
||||
}
|
||||
|
||||
switch(type) {
|
||||
default:
|
||||
printf("Ignoring %c%c%c%c, starting at %ld of length %d\n", (type >> 24), (type >> 16) & 0xff, (type >> 8) & 0xff, type & 0xff, start_of_block, length);
|
||||
break;
|
||||
|
||||
case block("CAPS"):
|
||||
// Analogously to the sanity check above, if a CAPS block is anywhere other
|
||||
// than first then something is amiss.
|
||||
if(start_of_block) {
|
||||
throw Error::InvalidFormat;
|
||||
}
|
||||
break;
|
||||
|
||||
case block("INFO"): {
|
||||
// There are a lot of useful archival fields in the info chunk, which for emulation
|
||||
// aren't that interesting.
|
||||
|
||||
// Make sure this is a floppy disk.
|
||||
const uint32_t media_type = file_.get32be();
|
||||
if(media_type != 1) {
|
||||
throw Error::InvalidFormat;
|
||||
}
|
||||
|
||||
// Determine whether this is a newer SPS-style file.
|
||||
is_sps_format_ = file_.get32be() > 1;
|
||||
|
||||
// Skip: revision, file key and revision, CRC of the original .ctr, and minimum track.
|
||||
file_.seek(20, SEEK_CUR);
|
||||
track_count_ = int(1 + file_.get32be());
|
||||
|
||||
// Skip: min side.
|
||||
file_.seek(4, SEEK_CUR);
|
||||
head_count_ = int(1 + file_.get32be());
|
||||
|
||||
// Skip: creation date, time.
|
||||
file_.seek(8, SEEK_CUR);
|
||||
|
||||
platform_type_ = 0;
|
||||
for(int c = 0; c < 4; c++) {
|
||||
const uint8_t platform = file_.get8();
|
||||
switch(platform) {
|
||||
default: break;
|
||||
case 1: platform_type_ |= TargetPlatform::Amiga; break;
|
||||
case 2: platform_type_ |= TargetPlatform::AtariST; break;
|
||||
/* Omitted: 3 -> IBM PC */
|
||||
case 4: platform_type_ |= TargetPlatform::AmstradCPC; break;
|
||||
case 5: platform_type_ |= TargetPlatform::ZXSpectrum; break;
|
||||
/* Omitted: 6 -> Sam Coupé */
|
||||
/* Omitted: 7 -> Archimedes */
|
||||
/* Omitted: 8 -> C64 */
|
||||
/* Omitted: 9 -> Atari 8-bit */
|
||||
}
|
||||
}
|
||||
|
||||
// If the file didn't declare anything, default to supporting everything.
|
||||
if(!platform_type_) {
|
||||
platform_type_ = ~0;
|
||||
}
|
||||
|
||||
// Ignore: disk number, creator ID, reserved area.
|
||||
} break;
|
||||
|
||||
case block("IMGE"): {
|
||||
// Get track location.
|
||||
const uint32_t track = file_.get32be();
|
||||
const uint32_t side = file_.get32be();
|
||||
const Track::Address address{int(side), HeadPosition(int(track))};
|
||||
|
||||
// Hence generate a TrackDescription.
|
||||
auto pair = tracks_.emplace(address, TrackDescription());
|
||||
TrackDescription &description = pair.first->second;
|
||||
|
||||
// Read those fields of interest...
|
||||
|
||||
// Bit density. I've no idea why the density can't just be given as a measurement.
|
||||
description.density = TrackDescription::Density(file_.get32be());
|
||||
if(description.density > TrackDescription::Density::Max) {
|
||||
description.density = TrackDescription::Density::Unknown;
|
||||
}
|
||||
|
||||
file_.seek(12, SEEK_CUR); // Skipped: signal type, track bytes, start byte position.
|
||||
description.start_bit_pos = file_.get32be();
|
||||
description.data_bits = file_.get32be();
|
||||
description.gap_bits = file_.get32be();
|
||||
|
||||
file_.seek(4, SEEK_CUR); // Skipped: track bits, which is entirely redundant.
|
||||
description.block_count = file_.get32be();
|
||||
|
||||
file_.seek(4, SEEK_CUR); // Skipped: encoder process.
|
||||
description.has_fuzzy_bits = file_.get32be() & 1;
|
||||
|
||||
// For some reason the authors decided to introduce another primary key,
|
||||
// in addition to that which naturally exists of (track, side). So set up
|
||||
// a mapping from the one to the other.
|
||||
const uint32_t data_key = file_.get32be();
|
||||
tracks_by_data_key.emplace(data_key, address);
|
||||
} break;
|
||||
|
||||
case block("DATA"): {
|
||||
length += file_.get32be();
|
||||
|
||||
file_.seek(8, SEEK_CUR); // Skipped: bit size, CRC.
|
||||
|
||||
// Grab the data key and use that to establish the file starting
|
||||
// position for this track.
|
||||
//
|
||||
// Assumed here: DATA records will come after corresponding IMGE records.
|
||||
const uint32_t data_key = file_.get32be();
|
||||
const auto pair = tracks_by_data_key.find(data_key);
|
||||
if(pair == tracks_by_data_key.end()) {
|
||||
break;
|
||||
}
|
||||
|
||||
auto description = tracks_.find(pair->second);
|
||||
if(description == tracks_.end()) {
|
||||
break;
|
||||
}
|
||||
description->second.file_offset = file_.tell();
|
||||
} break;
|
||||
}
|
||||
|
||||
file_.seek(start_of_block + length, SEEK_SET);
|
||||
}
|
||||
}
|
||||
|
||||
HeadPosition IPF::get_maximum_head_position() {
|
||||
return HeadPosition(track_count_);
|
||||
}
|
||||
|
||||
int IPF::get_head_count() {
|
||||
return head_count_;
|
||||
}
|
||||
|
||||
std::shared_ptr<Track> IPF::get_track_at_position([[maybe_unused]] Track::Address address) {
|
||||
// Get the track description, if it exists, and check either that the file has contents for the track.
|
||||
auto pair = tracks_.find(address);
|
||||
if(pair == tracks_.end()) {
|
||||
return nullptr;
|
||||
}
|
||||
const TrackDescription &description = pair->second;
|
||||
if(!description.file_offset) {
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
// Seek to track content.
|
||||
file_.seek(description.file_offset, SEEK_SET);
|
||||
|
||||
// Read the block descriptions up front.
|
||||
//
|
||||
// This is less efficient than just seeking for each block in turn,
|
||||
// but is a useful crutch to comprehension of the file format on a
|
||||
// first run through.
|
||||
struct BlockDescriptor {
|
||||
uint32_t data_bits = 0;
|
||||
uint32_t gap_bits = 0;
|
||||
uint32_t gap_offset = 0;
|
||||
bool is_mfm = false;
|
||||
bool has_forward_gap = false;
|
||||
bool has_backwards_gap = false;
|
||||
bool data_unit_is_bits = false;
|
||||
uint32_t default_gap_value = 0;
|
||||
uint32_t data_offset = 0;
|
||||
};
|
||||
std::vector<BlockDescriptor> blocks;
|
||||
blocks.reserve(description.block_count);
|
||||
for(uint32_t c = 0; c < description.block_count; c++) {
|
||||
auto &block = blocks.emplace_back();
|
||||
block.data_bits = file_.get32be();
|
||||
block.gap_bits = file_.get32be();
|
||||
if(is_sps_format_) {
|
||||
block.gap_offset = file_.get32be();
|
||||
file_.seek(4, SEEK_CUR); // Skip 'cell type' which appears to provide no content.
|
||||
} else {
|
||||
// Skip potlower-resolution copies of data_bits and gap_bits.
|
||||
file_.seek(8, SEEK_CUR);
|
||||
}
|
||||
block.is_mfm = file_.get32be() == 1;
|
||||
|
||||
const uint32_t flags = file_.get32be();
|
||||
block.has_forward_gap = flags & 1;
|
||||
block.has_backwards_gap = flags & 2;
|
||||
block.data_unit_is_bits = flags & 4;
|
||||
|
||||
block.default_gap_value = file_.get32be();
|
||||
block.data_offset = file_.get32be();
|
||||
}
|
||||
|
||||
std::vector<Storage::Disk::PCMSegment> segments;
|
||||
int block_count = 0;
|
||||
for(auto &block: blocks) {
|
||||
const auto length_of_a_bit = bit_length(description.density, block_count);
|
||||
|
||||
if(block.gap_offset) {
|
||||
file_.seek(description.file_offset + block.gap_offset, SEEK_SET);
|
||||
while(true) {
|
||||
const uint8_t gap_header = file_.get8();
|
||||
if(!gap_header) break;
|
||||
|
||||
// Decompose the header and read the length.
|
||||
enum class Type {
|
||||
None, GapLength, SampleLength
|
||||
} type = Type(gap_header & 0x1f);
|
||||
const size_t length = block_size(file_, gap_header);
|
||||
|
||||
switch(type) {
|
||||
case Type::GapLength:
|
||||
printf("Adding gap length %zu bits\n", length);
|
||||
add_gap(segments, length_of_a_bit, length, block.default_gap_value);
|
||||
break;
|
||||
|
||||
default:
|
||||
case Type::SampleLength:
|
||||
printf("Adding sampled gap length %zu bits\n", length);
|
||||
add_raw_data(segments, length_of_a_bit, length);
|
||||
// file_.seek(long(length >> 3), SEEK_CUR);
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else if(block.gap_bits) {
|
||||
add_gap(segments, length_of_a_bit, block.gap_bits, block.default_gap_value);
|
||||
}
|
||||
|
||||
if(block.data_offset) {
|
||||
file_.seek(description.file_offset + block.data_offset, SEEK_SET);
|
||||
while(true) {
|
||||
const uint8_t data_header = file_.get8();
|
||||
if(!data_header) break;
|
||||
|
||||
// Decompose the header and read the length.
|
||||
enum class Type {
|
||||
None, Sync, Data, Gap, Raw, Fuzzy
|
||||
} type = Type(data_header & 0x1f);
|
||||
const size_t length = block_size(file_, data_header) * (block.data_unit_is_bits ? 1 : 8);
|
||||
#ifndef NDEBUG
|
||||
const auto next_chunk = file_.tell() + long(length >> 3);
|
||||
#endif
|
||||
|
||||
switch(type) {
|
||||
case Type::Gap:
|
||||
case Type::Data:
|
||||
add_unencoded_data(segments, length_of_a_bit, length);
|
||||
break;
|
||||
|
||||
case Type::Sync:
|
||||
case Type::Raw:
|
||||
add_raw_data(segments, length_of_a_bit, length);
|
||||
break;
|
||||
|
||||
default:
|
||||
printf("Unhandled data type %d, length %zu bits\n", int(type), length);
|
||||
break;
|
||||
}
|
||||
|
||||
assert(file_.tell() == next_chunk);
|
||||
}
|
||||
}
|
||||
|
||||
++block_count;
|
||||
}
|
||||
|
||||
return std::make_shared<Storage::Disk::PCMTrack>(segments);
|
||||
}
|
||||
|
||||
/// @returns The correct bit length for @c block on a track of @c density.
|
||||
///
|
||||
/// @discussion At least to me, this is the least well-designed part] of the IPF specification; rather than just dictating cell
|
||||
/// densities (or, equivalently, lengths) in the file, densities are named according to their protection scheme and the decoder
|
||||
/// is required to know all named protection schemes. Which makes IPF unable to handle arbitrary disks (or, indeed, disks
|
||||
/// with multiple protection schemes on a single track).
|
||||
Storage::Time IPF::bit_length(TrackDescription::Density density, int block) {
|
||||
constexpr unsigned int us = 100'000'000;
|
||||
static constexpr auto us170 = Storage::Time::simplified(170, us);
|
||||
static constexpr auto us180 = Storage::Time::simplified(180, us);
|
||||
static constexpr auto us189 = Storage::Time::simplified(189, us);
|
||||
static constexpr auto us190 = Storage::Time::simplified(190, us);
|
||||
static constexpr auto us199 = Storage::Time::simplified(199, us);
|
||||
static constexpr auto us200 = Storage::Time::simplified(200, us);
|
||||
static constexpr auto us209 = Storage::Time::simplified(209, us);
|
||||
static constexpr auto us210 = Storage::Time::simplified(210, us);
|
||||
static constexpr auto us220 = Storage::Time::simplified(220, us);
|
||||
|
||||
switch(density) {
|
||||
default:
|
||||
break;
|
||||
|
||||
case TrackDescription::Density::CopylockAmiga:
|
||||
if(block == 4) return us189;
|
||||
if(block == 5) return us199;
|
||||
if(block == 6) return us209;
|
||||
break;
|
||||
|
||||
case TrackDescription::Density::CopylockAmigaNew:
|
||||
if(block == 0) return us189;
|
||||
if(block == 1) return us199;
|
||||
if(block == 2) return us209;
|
||||
break;
|
||||
|
||||
case TrackDescription::Density::CopylockST:
|
||||
if(block == 5) return us210;
|
||||
break;
|
||||
|
||||
case TrackDescription::Density::SpeedlockAmiga:
|
||||
if(block == 1) return us220;
|
||||
if(block == 2) return us180;
|
||||
break;
|
||||
|
||||
case TrackDescription::Density::OldSpeedlockAmiga:
|
||||
if(block == 1) return us210;
|
||||
break;
|
||||
|
||||
case TrackDescription::Density::AdamBrierleyAmiga:
|
||||
if(block == 1) return us220;
|
||||
if(block == 2) return us210;
|
||||
if(block == 3) return us200;
|
||||
if(block == 4) return us190;
|
||||
if(block == 5) return us180;
|
||||
if(block == 6) return us170;
|
||||
break;
|
||||
|
||||
// TODO: AdamBrierleyDensityKeyAmiga.
|
||||
}
|
||||
|
||||
return us200; // i.e. default to 2µs.
|
||||
}
|
||||
|
||||
void IPF::add_gap(std::vector<Storage::Disk::PCMSegment> &track, Time bit_length, size_t num_bits, uint32_t value) {
|
||||
auto &segment = track.emplace_back();
|
||||
segment.length_of_a_bit = bit_length;
|
||||
|
||||
// Empirically, I think gaps require MFM encoding.
|
||||
const auto byte_length = (num_bits + 7) >> 3;
|
||||
segment.data.reserve(byte_length * 16);
|
||||
|
||||
auto encoder = Storage::Encodings::MFM::GetMFMEncoder(segment.data);
|
||||
while(segment.data.size() < num_bits) {
|
||||
encoder->add_byte(uint8_t(value >> 24));
|
||||
value = (value << 8) | (value >> 24);
|
||||
}
|
||||
|
||||
assert(segment.data.size() <= (byte_length * 16));
|
||||
segment.data.resize(num_bits);
|
||||
}
|
||||
|
||||
void IPF::add_unencoded_data(std::vector<Storage::Disk::PCMSegment> &track, Time bit_length, size_t num_bits) {
|
||||
auto &segment = track.emplace_back();
|
||||
segment.length_of_a_bit = bit_length;
|
||||
|
||||
// Length appears to be in pre-encoded bits; double that to get encoded bits.
|
||||
const auto byte_length = (num_bits + 7) >> 3;
|
||||
segment.data.reserve(num_bits * 16);
|
||||
|
||||
auto encoder = Storage::Encodings::MFM::GetMFMEncoder(segment.data);
|
||||
for(size_t c = 0; c < num_bits; c += 8) {
|
||||
encoder->add_byte(file_.get8());
|
||||
}
|
||||
|
||||
assert(segment.data.size() <= (byte_length * 16));
|
||||
segment.data.resize(num_bits * 2);
|
||||
}
|
||||
|
||||
void IPF::add_raw_data(std::vector<Storage::Disk::PCMSegment> &track, Time bit_length, size_t num_bits) {
|
||||
auto &segment = track.emplace_back();
|
||||
segment.length_of_a_bit = bit_length;
|
||||
|
||||
const auto num_bits_ceiling = size_t(num_bits + 7) & size_t(~7);
|
||||
segment.data.reserve(num_bits_ceiling);
|
||||
|
||||
for(size_t bit = 0; bit < num_bits; bit += 8) {
|
||||
const uint8_t next = file_.get8();
|
||||
segment.data.push_back(next & 0x80);
|
||||
segment.data.push_back(next & 0x40);
|
||||
segment.data.push_back(next & 0x20);
|
||||
segment.data.push_back(next & 0x10);
|
||||
segment.data.push_back(next & 0x08);
|
||||
segment.data.push_back(next & 0x04);
|
||||
segment.data.push_back(next & 0x02);
|
||||
segment.data.push_back(next & 0x01);
|
||||
}
|
||||
|
||||
assert(segment.data.size() <= num_bits_ceiling);
|
||||
segment.data.resize(num_bits);
|
||||
}
|
||||
91
Storage/Disk/DiskImage/Formats/IPF.hpp
Normal file
91
Storage/Disk/DiskImage/Formats/IPF.hpp
Normal file
@ -0,0 +1,91 @@
|
||||
//
|
||||
// IPF.hpp
|
||||
// Clock Signal
|
||||
//
|
||||
// Created by Thomas Harte on 25/12/2021.
|
||||
// Copyright © 2021 Thomas Harte. All rights reserved.
|
||||
//
|
||||
|
||||
#ifndef IPF_hpp
|
||||
#define IPF_hpp
|
||||
|
||||
#include "../DiskImage.hpp"
|
||||
#include "../../Track/PCMTrack.hpp"
|
||||
#include "../../../FileHolder.hpp"
|
||||
#include "../../../TargetPlatforms.hpp"
|
||||
|
||||
#include <string>
|
||||
#include <map>
|
||||
|
||||
namespace Storage {
|
||||
namespace Disk {
|
||||
|
||||
/*!
|
||||
Provides a @c DiskImage containing an IPF, which is a mixed stream of raw flux windows and
|
||||
unencoded MFM sections along with gap records that can be used to record write splices, all
|
||||
of which is variably clocked (albeit not at flux transition resolution; as a result IPF files tend to be
|
||||
close in size to more primitive formats).
|
||||
*/
|
||||
class IPF: public DiskImage, public TargetPlatform::TypeDistinguisher {
|
||||
public:
|
||||
/*!
|
||||
Construct an @c IPF containing content from the file with name @c file_name.
|
||||
|
||||
@throws Storage::FileHolder::Error::CantOpen if this file can't be opened.
|
||||
@throws Error::InvalidFormat if the file doesn't appear to contain an .HFE format image.
|
||||
@throws Error::UnknownVersion if the file looks correct but is an unsupported version.
|
||||
*/
|
||||
IPF(const std::string &file_name);
|
||||
|
||||
// implemented to satisfy @c Disk
|
||||
HeadPosition get_maximum_head_position() final;
|
||||
int get_head_count() final;
|
||||
std::shared_ptr<Track> get_track_at_position(Track::Address address) final;
|
||||
|
||||
private:
|
||||
Storage::FileHolder file_;
|
||||
uint16_t seek_track(Track::Address address);
|
||||
|
||||
struct TrackDescription {
|
||||
long file_offset = 0;
|
||||
enum class Density {
|
||||
Unknown,
|
||||
Noise,
|
||||
Auto,
|
||||
CopylockAmiga,
|
||||
CopylockAmigaNew,
|
||||
CopylockST,
|
||||
SpeedlockAmiga,
|
||||
OldSpeedlockAmiga,
|
||||
AdamBrierleyAmiga,
|
||||
AdamBrierleyDensityKeyAmiga,
|
||||
|
||||
Max = AdamBrierleyDensityKeyAmiga
|
||||
} density = Density::Unknown;
|
||||
uint32_t start_bit_pos = 0;
|
||||
uint32_t data_bits = 0;
|
||||
uint32_t gap_bits = 0;
|
||||
uint32_t block_count;
|
||||
bool has_fuzzy_bits = false;
|
||||
};
|
||||
|
||||
int head_count_;
|
||||
int track_count_;
|
||||
std::map<Track::Address, TrackDescription> tracks_;
|
||||
bool is_sps_format_ = false;
|
||||
|
||||
TargetPlatform::Type target_platform_type() final {
|
||||
return TargetPlatform::Type(platform_type_);
|
||||
}
|
||||
TargetPlatform::IntType platform_type_ = TargetPlatform::Amiga;
|
||||
|
||||
Time bit_length(TrackDescription::Density, int block);
|
||||
void add_gap(std::vector<Storage::Disk::PCMSegment> &, Time bit_length, size_t num_bits, uint32_t value);
|
||||
void add_unencoded_data(std::vector<Storage::Disk::PCMSegment> &, Time bit_length, size_t num_bits);
|
||||
void add_raw_data(std::vector<Storage::Disk::PCMSegment> &, Time bit_length, size_t num_bits);
|
||||
};
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* IPF_hpp */
|
||||
@ -33,6 +33,10 @@ struct Time {
|
||||
Time(float value) {
|
||||
install_float(value);
|
||||
}
|
||||
static constexpr Time simplified(unsigned int _length, unsigned int _clock_rate) {
|
||||
const auto gcd = std::gcd(_length, _clock_rate);
|
||||
return Time(_length / gcd, _clock_rate / gcd);
|
||||
}
|
||||
|
||||
/*!
|
||||
Reduces this @c Time to its simplest form; eliminates all common factors from @c length
|
||||
|
||||
Loading…
Reference in New Issue
Block a user