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author | 2022-09-27 07:30:52 +0200 | |
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committer | 2022-09-28 17:44:09 +0200 | |
commit | f9870d6f020b55991aa1838bca70fd5379b0cefc (patch) | |
tree | 35151a060e18129481790f719e8cf029a0c00f03 /src/lib/formats/as_dsk.cpp | |
parent | eb4cbebb15aaa8e7a494570a6f9b295e647c56c1 (diff) |
ap2_dsk: Move the applesauce formats in their own file
as_dsk: Create a common base class, merge what is currently identical
Diffstat (limited to 'src/lib/formats/as_dsk.cpp')
-rw-r--r-- | src/lib/formats/as_dsk.cpp | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/src/lib/formats/as_dsk.cpp b/src/lib/formats/as_dsk.cpp new file mode 100644 index 00000000000..eef5bb6dc80 --- /dev/null +++ b/src/lib/formats/as_dsk.cpp @@ -0,0 +1,464 @@ +// license:BSD-3-Clause +// copyright-holders:Olivier Galibert + +// Applesauce solved output formats + +#include "as_dsk.h" +#include "ioprocs.h" + +#include <string.h> + +as_format::as_format() : floppy_image_format_t() +{ +} + +uint32_t as_format::find_tag(const std::vector<uint8_t> &data, uint32_t tag) +{ + uint32_t offset = 12; + do { + if(r32(data, offset) == tag) + return offset + 8; + offset += r32(data, offset+4) + 8; + } while(offset < data.size() - 8); + return 0; +} + +uint32_t as_format::r32(const std::vector<uint8_t> &data, uint32_t offset) +{ + return data[offset] | (data[offset+1] << 8) | (data[offset+2] << 16) | (data[offset+3] << 24); +} + +uint16_t as_format::r16(const std::vector<uint8_t> &data, uint32_t offset) +{ + return data[offset] | (data[offset+1] << 8); +} + +void as_format::w32(std::vector<uint8_t> &data, int offset, uint32_t value) +{ + data[offset] = value; + data[offset+1] = value >> 8; + data[offset+2] = value >> 16; + data[offset+3] = value >> 24; +} + +void as_format::w16(std::vector<uint8_t> &data, int offset, uint16_t value) +{ + data[offset] = value; + data[offset+1] = value >> 8; +} + +uint8_t as_format::r8(const std::vector<uint8_t> &data, uint32_t offset) +{ + return data[offset]; +} + +uint32_t as_format::crc32r(const uint8_t *data, uint32_t size) +{ + // Reversed crc32 + uint32_t crc = 0xffffffff; + for(uint32_t i=0; i != size; i++) { + crc = crc ^ data[i]; + for(int j=0; j<8; j++) + if(crc & 1) + crc = (crc >> 1) ^ 0xedb88320; + else + crc = crc >> 1; + } + return ~crc; +} + +bool as_format::load_bitstream_track(const std::vector<uint8_t> &img, floppy_image *image, int head, int track, int subtrack, uint8_t idx, uint32_t off_trks, bool may_be_short, bool set_variant) +{ + uint32_t trks_off = off_trks + (idx * 8); + + uint32_t track_size = r32(img, trks_off + 4); + if (track_size == 0) + return false; + + uint32_t boff = (uint32_t)r16(img, trks_off + 0) * 512; + + // With 5.25 floppies the end-of-track may be missing + // if unformatted. Accept track length down to 95% of + // 51090, otherwise pad it + + bool short_track = may_be_short && track_size < 48535; + + if(short_track) { + std::vector<uint8_t> buffer(6387, 0); + memcpy(buffer.data(), &img[boff], (track_size + 7) / 8); + generate_track_from_bitstream(track, head, buffer.data(), 51090, image, subtrack, 0xffff); + + } else + generate_track_from_bitstream(track, head, &img[boff], track_size, image, subtrack, 0xffff); + + if(set_variant) + image->set_variant(r32(img, trks_off + 4) >= 90000 ? floppy_image::DSHD : floppy_image::DSDD); + return true; +} + +void as_format::load_flux_track(const std::vector<uint8_t> &img, floppy_image *image, int head, int track, int subtrack, uint8_t fidx, uint32_t off_trks) +{ + uint32_t trks_off = off_trks + (fidx * 8); + uint32_t boff = (uint32_t)r16(img, trks_off + 0) * 512; + uint32_t track_size = r32(img, trks_off + 4); + + uint32_t total_ticks = 0; + for(uint32_t i=0; i != track_size; i++) + total_ticks += img[boff+i]; + + // There is always a pulse at index, and it's + // the last one in the stream + std::vector<uint32_t> &buf = image->get_buffer(track, head, subtrack); + buf.push_back(floppy_image::MG_F | 0); + uint32_t cpos = 0; + for(uint32_t i=0; i != track_size; i++) { + uint8_t step = img[boff+i]; + cpos += step; + if(step != 0xff && i != track_size-1) + buf.push_back(floppy_image::MG_F | uint64_t(cpos)*200000000/total_ticks); + } +} + + + +woz_format::woz_format() : as_format() +{ +} + +const char *woz_format::name() const +{ + return "woz"; +} + +const char *woz_format::description() const +{ + return "Apple II WOZ Image"; +} + +const char *woz_format::extensions() const +{ + return "woz"; +} + +bool woz_format::supports_save() const +{ + return true; +} + +const uint8_t woz_format::signature[8] = { 0x57, 0x4f, 0x5a, 0x31, 0xff, 0x0a, 0x0d, 0x0a }; +const uint8_t woz_format::signature2[8] = { 0x57, 0x4f, 0x5a, 0x32, 0xff, 0x0a, 0x0d, 0x0a }; + +int woz_format::identify(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants) const +{ + uint8_t header[8]; + size_t actual; + io.read_at(0, header, 8, actual); + if (!memcmp(header, signature, 8)) return FIFID_SIGN; + if (!memcmp(header, signature2, 8)) return FIFID_SIGN; + return 0; +} + +bool woz_format::load(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants, floppy_image *image) const +{ + uint64_t image_size; + if(io.length(image_size)) + return false; + std::vector<uint8_t> img(image_size); + size_t actual; + io.read_at(0, &img[0], img.size(), actual); + + // Check signature + if((memcmp(&img[0], signature, 8)) && (memcmp(&img[0], signature2, 8))) + return false; + + uint32_t woz_vers = 1; + if(!memcmp(&img[0], signature2, 8)) woz_vers = 2; + + // Check integrity + uint32_t crc = crc32r(&img[12], img.size() - 12); + if(crc != r32(img, 8)) + return false; + + uint32_t off_info = find_tag(img, 0x4f464e49); + uint32_t off_tmap = find_tag(img, 0x50414d54); + uint32_t off_trks = find_tag(img, 0x534b5254); +// uint32_t off_writ = find_tag(img, 0x54495257); + + if(!off_info || !off_tmap || !off_trks) + return false; + + uint32_t info_vers = r8(img, off_info + 0); + if(info_vers < 1 || info_vers > 3) + return false; + + uint16_t off_flux = info_vers < 3 ? 0 : r16(img, off_info + 46); + uint16_t flux_size = info_vers < 3 ? 0 : r16(img, off_info + 48); + + if(!flux_size) + off_flux = 0; + + bool is_35 = r8(img, off_info + 1) == 2; + + if((form_factor == floppy_image::FF_35 && !is_35) || (form_factor == floppy_image::FF_525 && is_35)) + return false; + + unsigned int limit = is_35 ? 160 : 141; + + if(is_35) + image->set_form_variant(floppy_image::FF_35, floppy_image::SSDD); + else + image->set_form_variant(floppy_image::FF_525, floppy_image::SSSD); + + if (woz_vers == 1) { + for (unsigned int trkid = 0; trkid != limit; trkid++) { + int head = is_35 && trkid >= 80 ? 1 : 0; + int track = is_35 ? trkid % 80 : trkid / 4; + int subtrack = is_35 ? 0 : trkid & 3; + + uint8_t idx = r8(img, off_tmap + trkid); + if(idx != 0xff) { + uint32_t boff = off_trks + 6656*idx; + if (r16(img, boff + 6648) == 0) + return false; + generate_track_from_bitstream(track, head, &img[boff], r16(img, boff + 6648), image, subtrack, r16(img, boff + 6650)); + if(is_35 && !track && head) + image->set_variant(floppy_image::DSDD); + } + } + } else if (woz_vers == 2) { + for (unsigned int trkid = 0; trkid != limit; trkid++) { + int head = is_35 && trkid & 1 ? 1 : 0; + int track = is_35 ? trkid >> 1 : trkid / 4; + int subtrack = is_35 ? 0 : trkid & 3; + + uint8_t idx = r8(img, off_tmap + trkid); + uint8_t fidx = off_flux ? r8(img, off_flux*512 + 8 + trkid) : 0xff; + + if(fidx != 0xff) + load_flux_track(img, image, head, track, subtrack, fidx, off_trks); + + else if(idx != 0xff) { + if(!load_bitstream_track(img, image, head, track, subtrack, idx, off_trks, !is_35, is_35 && !track && head)) + return false; + } + } + } + else return false; + + return true; +} + +bool woz_format::save(util::random_read_write &io, const std::vector<uint32_t> &variants, floppy_image *image) const +{ + std::vector<std::vector<bool>> tracks(160); + bool twosided = false; + + if(image->get_form_factor() == floppy_image::FF_525) { + for(unsigned int i=0; i != 141; i++) + if(image->track_is_formatted(i >> 2, 0, i & 3)) + tracks[i] = generate_bitstream_from_track(i >> 2, 0, 3915, image, i & 3); + + } else if(image->get_variant() == floppy_image::DSHD) { + for(unsigned int i=0; i != 160; i++) + if(image->track_is_formatted(i >> 1, i & 1)) { + tracks[i] = generate_bitstream_from_track(i >> 1, i & 1, 1000, image); + if(i & 1) + twosided = true; + } + + } else { + // 200000000 / 60.0 * 1.979e-6 ~= 6.5967 + static const int cell_size_per_speed_zone[5] = { + 394 * 65967 / 10000, + 429 * 65967 / 10000, + 472 * 65967 / 10000, + 525 * 65967 / 10000, + 590 * 65967 / 10000 + }; + + for(unsigned int i=0; i != 160; i++) + if(image->track_is_formatted(i >> 1, i & 1)) { + tracks[i] = generate_bitstream_from_track(i >> 1, i & 1, cell_size_per_speed_zone[i / (2*16)], image); + if(i & 1) + twosided = true; + } + } + + int max_blocks = 0; + int total_blocks = 0; + for(const auto &t : tracks) { + int blocks = (t.size() + 4095) / 4096; + total_blocks += blocks; + if(max_blocks < blocks) + max_blocks = blocks; + } + + std::vector<uint8_t> data(1536 + total_blocks*512, 0); + + memcpy(&data[0], signature2, 8); + + w32(data, 12, 0x4F464E49); // INFO + w32(data, 16, 60); // size + data[20] = 2; // chunk version + data[21] = image->get_form_factor() == floppy_image::FF_525 ? 1 : 2; + data[22] = 0; // not write protected + data[23] = 1; // synchronized, since our internal format is + data[24] = 1; // weak bits are generated, not stored + data[25] = 'M'; + data[26] = 'A'; + data[27] = 'M'; + data[28] = 'E'; + memset(&data[29], ' ', 32-4); + data[57] = twosided ? 2 : 1; + data[58] = 0; // boot sector unknown + data[59] = image->get_form_factor() == floppy_image::FF_525 ? 32 : image->get_variant() == floppy_image::DSHD ? 8 : 16; + w16(data, 60, 0); // compatibility unknown + w16(data, 62, 0); // needed ram unknown + w16(data, 64, max_blocks); + w32(data, 80, 0x50414D54); // TMAP + w32(data, 84, 160); // size + + uint8_t tcount = 0; + for(int i=0; i != 160 ; i++) + data[88 + i] = tracks[i].empty() ? 0xff : tcount++; + + w32(data, 248, 0x534B5254); // TRKS + w32(data, 252, 1280 + total_blocks*512); // size + + uint8_t tid = 0; + uint16_t tb = 3; + for(int i=0; i != 160 ; i++) + if(!tracks[i].empty()) { + int blocks = (tracks[i].size() + 4095) / 4096; + w16(data, 256 + tid*8, tb); + w16(data, 256 + tid*8 + 2, blocks); + w32(data, 256 + tid*8 + 4, tracks[i].size()); + tb += blocks; + tid ++; + } + + tb = 3; + for(int i=0; i != 160 ; i++) + if(!tracks[i].empty()) { + int off = tb * 512; + int size = tracks[i].size(); + for(int j=0; j != size; j++) + if(tracks[i][j]) + data[off + (j >> 3)] |= 0x80 >> (j & 7); + tb += (size + 4095) / 4096; + } + + w32(data, 8, crc32r(&data[12], data.size() - 12)); + + size_t actual; + io.write_at(0, data.data(), data.size(), actual); + return true; +} + +const woz_format FLOPPY_WOZ_FORMAT; + + +moof_format::moof_format() : as_format() +{ +} + +const char *moof_format::name() const +{ + return "moof"; +} + +const char *moof_format::description() const +{ + return "Macintosh MOOF Image"; +} + +const char *moof_format::extensions() const +{ + return "moof"; +} + +bool moof_format::supports_save() const +{ + return false; +} + +const uint8_t moof_format::signature[8] = { 0x4d, 0x4f, 0x4f, 0x46, 0xff, 0x0a, 0x0d, 0x0a }; + +int moof_format::identify(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants) const +{ + uint8_t header[8]; + size_t actual; + io.read_at(0, header, 8, actual); + if (!memcmp(header, signature, 8)) return FIFID_SIGN; + return 0; +} + +bool moof_format::load(util::random_read &io, uint32_t form_factor, const std::vector<uint32_t> &variants, floppy_image *image) const +{ + uint64_t image_size; + if(io.length(image_size)) + return false; + std::vector<uint8_t> img(image_size); + size_t actual; + io.read_at(0, &img[0], img.size(), actual); + + // Check signature + if(memcmp(&img[0], signature, 8)) + return false; + + // Check integrity + uint32_t crc = crc32r(&img[12], img.size() - 12); + if(crc != r32(img, 8)) + return false; + + uint32_t off_info = find_tag(img, 0x4f464e49); + uint32_t off_tmap = find_tag(img, 0x50414d54); + uint32_t off_trks = find_tag(img, 0x534b5254); + + if(!off_info || !off_tmap || !off_trks) + return false; + + uint32_t info_vers = r8(img, off_info + 0); + if(info_vers != 1) + return false; + + uint16_t off_flux = r16(img, off_info + 40); + uint16_t flux_size = r16(img, off_info + 42); + + if(!flux_size) + off_flux = 0; + + switch(r8(img, off_info + 1)) { + case 1: + image->set_form_variant(floppy_image::FF_35, floppy_image::SSDD); + break; + case 2: + image->set_form_variant(floppy_image::FF_35, floppy_image::DSDD); + break; + case 3: + image->set_form_variant(floppy_image::FF_35, floppy_image::DSHD); + break; + default: + return false; + } + + for (unsigned int trkid = 0; trkid != 160; trkid++) { + int head = trkid & 1; + int track = trkid >> 1; + + uint8_t idx = r8(img, off_tmap + trkid); + uint8_t fidx = off_flux ? r8(img, off_flux*512 + 8 + trkid) : 0xff; + + if(fidx != 0xff) + load_flux_track(img, image, track, head, 0, fidx, off_trks); + + else if(idx != 0xff) { + if(!load_bitstream_track(img, image, head, track, 0, idx, off_trks, false, false)) + return false; + } + } + + return true; +} + +const moof_format FLOPPY_MOOF_FORMAT; |