| 108 | |
| 109 | public: |
| 110 | std::unique_ptr<Fluxmap> encode(const LogicalTrackLayout& ltl, |
| 111 | const std::vector<std::shared_ptr<const Sector>>& sectors, |
| 112 | const Image& image) override |
| 113 | { |
| 114 | IbmEncoderProto::TrackdataProto trackdata; |
| 115 | getEncoderTrackData(trackdata, ltl.logicalCylinder, ltl.logicalHead); |
| 116 | |
| 117 | auto writeBytes = [&](const Bytes& bytes) |
| 118 | { |
| 119 | if (trackdata.use_fm()) |
| 120 | encodeFm(_bits, _cursor, bytes); |
| 121 | else |
| 122 | encodeMfm(_bits, _cursor, bytes, _lastBit); |
| 123 | }; |
| 124 | |
| 125 | auto writeFillerRawBytes = [&](int count, uint16_t byte) |
| 126 | { |
| 127 | for (int i = 0; i < count; i++) |
| 128 | writeRawBits(byte, 16); |
| 129 | }; |
| 130 | |
| 131 | auto writeFillerBytes = [&](int count, uint8_t byte) |
| 132 | { |
| 133 | Bytes b{byte}; |
| 134 | for (int i = 0; i < count; i++) |
| 135 | writeBytes(b); |
| 136 | }; |
| 137 | |
| 138 | double clockRateUs = trackdata.target_clock_period_us(); |
| 139 | if (!trackdata.use_fm()) |
| 140 | clockRateUs /= 2.0; |
| 141 | int bitsPerRevolution = |
| 142 | (trackdata.target_rotational_period_ms() * 1000.0) / clockRateUs; |
| 143 | _bits.resize(bitsPerRevolution); |
| 144 | _cursor = 0; |
| 145 | |
| 146 | uint8_t idamUnencoded = decodeUint16(trackdata.idam_byte()); |
| 147 | uint8_t damUnencoded = decodeUint16(trackdata.dam_byte()); |
| 148 | |
| 149 | uint8_t sectorSize = 0; |
| 150 | { |
| 151 | int s = ltl.sectorSize >> 7; |
| 152 | while (s > 1) |
| 153 | { |
| 154 | s >>= 1; |
| 155 | sectorSize += 1; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | uint16_t gapFill = trackdata.gap_fill_byte(); |
| 160 | |
| 161 | writeFillerRawBytes(trackdata.gap0(), gapFill); |
| 162 | if (trackdata.emit_iam()) |
| 163 | { |
| 164 | writeFillerBytes(trackdata.use_fm() ? 6 : 12, 0x00); |
| 165 | if (!trackdata.use_fm()) |
| 166 | { |
| 167 | for (int i = 0; i < 3; i++) |