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87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
//
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// IPF.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 25/12/2021.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include "../DiskImage.hpp"
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#include "../../Track/PCMTrack.hpp"
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#include "../../../FileHolder.hpp"
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#include "../../../TargetPlatforms.hpp"
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#include <string>
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#include <map>
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namespace Storage::Disk {
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/*!
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Provides a @c DiskImage containing an IPF, which is a mixed stream of raw flux windows and
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unencoded MFM sections along with gap records that can be used to record write splices, all
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of which is variably clocked (albeit not at flux transition resolution; as a result IPF files tend to be
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close in size to more primitive formats).
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*/
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class IPF: public DiskImage, public TargetPlatform::TypeDistinguisher {
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public:
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/*!
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Construct an @c IPF containing content from the file with name @c file_name.
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@throws Storage::FileHolder::Error::CantOpen if this file can't be opened.
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@throws Error::InvalidFormat if the file doesn't appear to contain an .HFE format image.
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@throws Error::UnknownVersion if the file looks correct but is an unsupported version.
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*/
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IPF(const std::string &file_name);
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// implemented to satisfy @c Disk
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HeadPosition get_maximum_head_position() final;
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int get_head_count() final;
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std::shared_ptr<Track> get_track_at_position(Track::Address address) final;
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private:
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Storage::FileHolder file_;
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uint16_t seek_track(Track::Address address);
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struct TrackDescription {
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long file_offset = 0;
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enum class Density {
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Unknown,
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Noise,
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Auto,
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CopylockAmiga,
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CopylockAmigaNew,
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CopylockST,
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SpeedlockAmiga,
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OldSpeedlockAmiga,
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AdamBrierleyAmiga,
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AdamBrierleyDensityKeyAmiga,
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Max = AdamBrierleyDensityKeyAmiga
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} density = Density::Unknown;
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uint32_t start_bit_pos = 0;
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uint32_t data_bits = 0;
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uint32_t gap_bits = 0;
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uint32_t block_count;
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bool has_fuzzy_bits = false;
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};
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int head_count_;
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int track_count_;
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std::map<Track::Address, TrackDescription> tracks_;
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bool is_sps_format_ = false;
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TargetPlatform::Type target_platform_type() final {
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return TargetPlatform::Type(platform_type_);
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}
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TargetPlatform::IntType platform_type_ = TargetPlatform::Amiga;
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Time bit_length(TrackDescription::Density, int block);
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void add_gap(std::vector<Storage::Disk::PCMSegment> &, Time bit_length, size_t num_bits, uint32_t value);
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void add_unencoded_data(std::vector<Storage::Disk::PCMSegment> &, Time bit_length, size_t num_bits);
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void add_raw_data(std::vector<Storage::Disk::PCMSegment> &, Time bit_length, size_t num_bits);
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};
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}
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