├── .gitignore ├── example ├── test.mid ├── test_out.tic └── visualization.tic ├── pyproject.toml ├── setup.cfg ├── README.md ├── tic_midi.py └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | .local 2 | .ropeproject/ 3 | *.egg-info/ 4 | -------------------------------------------------------------------------------- /example/test.mid: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/wojciech-graj/TIC-MIDI/HEAD/example/test.mid -------------------------------------------------------------------------------- /example/test_out.tic: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/wojciech-graj/TIC-MIDI/HEAD/example/test_out.tic -------------------------------------------------------------------------------- /example/visualization.tic: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/wojciech-graj/TIC-MIDI/HEAD/example/visualization.tic -------------------------------------------------------------------------------- /pyproject.toml: -------------------------------------------------------------------------------- 1 | [build-system] 2 | requires = ["setuptools>=42", "wheel"] 3 | build-backend = "setuptools.build_meta" 4 | -------------------------------------------------------------------------------- /setup.cfg: -------------------------------------------------------------------------------- 1 | [metadata] 2 | name = TIC-MIDI 3 | version = 0.1.3 4 | 5 | [options] 6 | python_requires = >=3.9 7 | packages = find: 8 | install_requires = 9 | mido>=1.2.0,<=1.3.2 10 | 11 | [options.extras_require] 12 | dev = 13 | pylsp-mypy 14 | pylsp-rope 15 | python-lsp-isort 16 | python-lsp-server[all] 17 | 18 | [pydocstyle] 19 | ignore = D101,D102,D103,D107,D203,D212 20 | 21 | [mypy] 22 | allow_redefinition = True 23 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # TIC-MIDI 2 | 3 | A MIDI-to-TIC-80 converter. 4 | 5 | "The mission, the nightmares... they’re finally... over." - CT-5385 (presumably about switching to TIC-MIDI ;) ) 6 | 7 | ### Features 8 | - Utilizes up to all 4 audio channels simultaneously 9 | - Has variable audio resolution to use more or less space in exchange for audio quality 10 | - Can map midi tracks to sfx as dictated by the user, allowing for different instruments 11 | - Has variable volume 12 | - Sets tempo and speed to match input 13 | - Can insert music into existing cart 14 | - Can use any memory bank 15 | 16 | ### Limitations 17 | - Can only write a single file to a single track 18 | - Disregards multiple MIDI channels 19 | - Only considers the following MIDI messages: `set_tempo`, `note_on`, `note_off` 20 | - Only uses the Master Volume TIC-80 command 21 | - Does not generate sfx and waveforms 22 | 23 | ### Usage 24 | 25 | Make sure Python (3.9+) is available on your system. 26 | 27 | Install the dependencies: 28 | ```sh 29 | pip install -e . 30 | ``` 31 | OR 32 | ```sh 33 | pip install 'mido>=1.2.0,<=1.3.2' 34 | ``` 35 | 36 | Then, simply invoke the script: 37 | ```sh 38 | python tic_midi.py input_file -o output_file 39 | ``` 40 | 41 | To learn about the settings you can use, invoke the script with the `-h` flag: 42 | ```sh 43 | python tic_midi.py -h 44 | ``` 45 | 46 | When playing the music with your lua code, set `sustain=true` in your `music` function call, since the converter currently doesn't re-play notes when starting a new frame. 47 | 48 | A sample MIDI file, and the cartridge produced with it, can be found in the `example` directory. 49 | 50 | ### Development setup 51 | 52 | Install the development dependencies: 53 | ```sh 54 | pip install -e '.[dev]' 55 | ``` 56 | 57 | ### License 58 | ``` 59 | Copyright (C) 2023-2024 Wojciech Graj 60 | 61 | This program is free software: you can redistribute it and/or modify 62 | it under the terms of the GNU Affero General Public License as published by 63 | the Free Software Foundation, either version 3 of the License, or 64 | (at your option) any later version. 65 | 66 | This program is distributed in the hope that it will be useful, 67 | but WITHOUT ANY WARRANTY; without even the implied warranty of 68 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 69 | GNU Affero General Public License for more details. 70 | 71 | You should have received a copy of the GNU Affero General Public License 72 | along with this program. If not, see . 73 | ``` 74 | 75 | Portions of this software are copyright of their respective authors: 76 | - [mido](https://github.com/mido/mido), Licensed under the [MIT License](https://opensource.org/licenses/MIT); Copyright (c) Ole Martin Bjørndalen 77 | -------------------------------------------------------------------------------- /tic_midi.py: -------------------------------------------------------------------------------- 1 | """ 2 | TIC-MIDI, a MIDI to TIC-80 cartridge converter. 3 | 4 | Copyright (C) 2023-2024 Wojciech Graj 5 | 6 | This program is free software: you can redistribute it and/or modify 7 | it under the terms of the GNU Affero General Public License as published by 8 | the Free Software Foundation, either version 3 of the License, or 9 | (at your option) any later version. 10 | 11 | This program is distributed in the hope that it will be useful, 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 | GNU Affero General Public License for more details. 15 | 16 | You should have received a copy of the GNU Affero General Public License 17 | along with this program. If not, see . 18 | """ 19 | 20 | from __future__ import annotations # Remove after 2026-10 21 | 22 | import argparse 23 | import ctypes 24 | import itertools 25 | import logging 26 | import os 27 | import random 28 | import struct 29 | import sys 30 | import time 31 | from collections.abc import Sequence 32 | from dataclasses import dataclass 33 | from typing import Optional 34 | 35 | import mido 36 | from mido.midifiles.tracks import _to_abstime 37 | 38 | VERSION_STRING = "TIC-MIDI v0.1.3 2024-09-23 by Wojciech Graj" 39 | 40 | 41 | class Chunk: 42 | """A cartridge chunk.""" 43 | 44 | bank: int 45 | chunk_type: int 46 | size: int 47 | 48 | def __init__(self, chunk_type: int, size: int, bank: int = 0) -> None: 49 | self.chunk_type = chunk_type 50 | self.size = size 51 | self.bank = bank 52 | 53 | @classmethod 54 | def from_binary(self, binary: Sequence[int]) -> Chunk: 55 | return Chunk(binary[0] & 0x1F, binary[1] | (binary[2] << 8), 56 | binary[0] >> 5) 57 | 58 | def serialize(self) -> tuple[int, ...]: 59 | """Return the 4-byte chunk header.""" 60 | return ( 61 | ((self.bank << 5) & 0xE0) | (self.chunk_type & 0x1F), 62 | self.size & 0x00FF, 63 | (self.size & 0xFF00) >> 8, 64 | 0, 65 | ) 66 | 67 | 68 | class PatternRow(ctypes.LittleEndianStructure): 69 | _fields_ = [ 70 | ("note", ctypes.c_uint32, 4), 71 | ("param1", ctypes.c_uint32, 4), 72 | ("param2", ctypes.c_uint32, 4), 73 | ("command", ctypes.c_uint32, 3), 74 | # Some weird bit rearranging has to be done because it crosses a byte 75 | # boundary. 76 | ("_sfx", ctypes.c_uint32, 6), 77 | ("octave", ctypes.c_uint32, 3), 78 | ] 79 | 80 | @property 81 | def sfx(self) -> int: 82 | return ((self._sfx >> 1) | (self._sfx << 5)) & 0x3f 83 | 84 | @sfx.setter 85 | def sfx(self, sfx: int) -> None: 86 | self._sfx = (sfx << 1) | (sfx >> 5) 87 | 88 | def set(self, note: int, param1: int, param2: int, command: int, sfx: int, 89 | octave: int) -> None: 90 | self.note = note 91 | self.param1 = param1 92 | self.param2 = param2 93 | self.command = command 94 | self.sfx = sfx 95 | self.octave = octave 96 | 97 | def serialize(self) -> tuple[int, ...]: 98 | return struct.unpack_from("BBB", self) 99 | 100 | 101 | class Pattern: 102 | rows: list[PatternRow] 103 | 104 | def __init__(self) -> None: 105 | self.rows = [PatternRow() for i in range(64)] 106 | 107 | def serialize(self) -> tuple[int, ...]: 108 | return tuple(itertools.chain(*[row.serialize() for row in self.rows])) 109 | 110 | 111 | class Frame(ctypes.LittleEndianStructure): 112 | _fields_ = [ 113 | ("ch0", ctypes.c_uint32, 6), 114 | ("ch1", ctypes.c_uint32, 6), 115 | ("ch2", ctypes.c_uint32, 6), 116 | ("ch3", ctypes.c_uint32, 6), 117 | ] 118 | 119 | def get_ch(self, idx: int) -> int: 120 | if idx == 0: 121 | return self.ch0 - 1 122 | elif idx == 1: 123 | return self.ch1 - 1 124 | elif idx == 2: 125 | return self.ch2 - 1 126 | return self.ch3 - 1 127 | 128 | def set_ch(self, idx: int, ch: int) -> None: 129 | if idx == 0: 130 | self.ch0 = ch + 1 131 | elif idx == 1: 132 | self.ch1 = ch + 1 133 | elif idx == 2: 134 | self.ch2 = ch + 1 135 | elif idx == 3: 136 | self.ch3 = ch + 1 137 | 138 | def serialize(self) -> tuple[int, ...]: 139 | return struct.unpack_from("BBB", self) 140 | 141 | 142 | class Track(ctypes.LittleEndianStructure): 143 | _fields_ = [ 144 | ("_tempo", ctypes.c_int8), 145 | ("nrows", ctypes.c_uint8), 146 | ("_speed", ctypes.c_int8), 147 | ] 148 | frames: list[Frame] 149 | 150 | @property 151 | def tempo(self) -> int: 152 | return self._tempo + 150 153 | 154 | @tempo.setter 155 | def tempo(self, tempo: int) -> None: 156 | self._tempo = min(250, max(40, tempo)) - 150 157 | 158 | @property 159 | def speed(self) -> int: 160 | return self._speed + 6 161 | 162 | @speed.setter 163 | def speed(self, speed: int) -> None: 164 | self._speed = speed - 6 165 | 166 | def __init__(self) -> None: 167 | self.frames = [Frame() for i in range(16)] 168 | 169 | def serialize(self) -> tuple[int, ...]: 170 | return tuple( 171 | itertools.chain(*[frame.serialize() for frame in self.frames], 172 | struct.unpack_from("BBB", self))) 173 | 174 | 175 | class TrackChunk(Chunk): 176 | tracks: list[Track] 177 | 178 | def __init__(self, bank: int = 0) -> None: 179 | super().__init__(14, 408, bank=bank) 180 | self.tracks = [Track() for i in range(8)] 181 | 182 | def serialize(self) -> tuple[int, ...]: 183 | return tuple( 184 | itertools.chain(super().serialize(), 185 | *[track.serialize() for track in self.tracks])) 186 | 187 | 188 | class PatternChunk(Chunk): 189 | patterns: list[Pattern] 190 | 191 | def __init__(self, bank: int = 0) -> None: 192 | super().__init__(15, 11520, bank=bank) 193 | self.patterns = [Pattern() for i in range(60)] 194 | 195 | def serialize(self) -> tuple[int, ...]: 196 | return tuple( 197 | itertools.chain( 198 | super().serialize(), 199 | *[pattern.serialize() for pattern in self.patterns])) 200 | 201 | 202 | @dataclass 203 | class MessageExt: 204 | """MIDI Message with related metadata.""" 205 | 206 | msg: mido.Message 207 | sfx: int 208 | 209 | 210 | @dataclass 211 | class Channel: 212 | """State of a single Track channel.""" 213 | 214 | note: int = 0 215 | sfx: int = 0 216 | time_set: int = 0 217 | 218 | def set(self, note: int, sfx: int, time_set: int) -> None: 219 | self.note = note 220 | self.sfx = sfx 221 | self.time_set = time_set 222 | 223 | 224 | class ChannelState: 225 | """State of all 4 Track channels.""" 226 | 227 | channels: list[Channel] 228 | 229 | def __init__(self) -> None: 230 | self.channels = [Channel() for i in range(4)] 231 | 232 | def index(self, note: int, sfx: int) -> int: 233 | return next((i for i, channel in enumerate(self.channels) 234 | if channel.note == note and channel.sfx == sfx), -1) 235 | 236 | def calc_note_on_channel_placement(self, msge: MessageExt, 237 | replacement_policy: str) -> int: 238 | if (channel_idx := 239 | self.index(msge.msg.note, 240 | msge.sfx)) != -1: # Replace channel with same note 241 | return channel_idx 242 | if (channel_idx := self.index(0, 0)) != -1: # Replace empty channel 243 | return channel_idx 244 | # All channels in use, so use replacement policy 245 | if replacement_policy == 'random': 246 | return random.randrange(4) 247 | elif replacement_policy == 'fifo': 248 | return self.channels.index( 249 | min(self.channels, key=lambda channel: channel.time_set)) 250 | elif replacement_policy == 'lifo': 251 | return self.channels.index( 252 | max(self.channels, key=lambda channel: channel.time_set)) 253 | return -1 254 | 255 | 256 | def _preprocess_messages( 257 | mid: mido.MidiFile, 258 | sfx_names: Optional[dict]) -> Optional[list[MessageExt]]: 259 | """ 260 | Combine all messages from all tracks into a list of MessageExt. 261 | 262 | Map tracks to sfx during conversion. 263 | """ 264 | messages: list[MessageExt] = [] 265 | for sfx_idx, track in enumerate(mid.tracks): 266 | if sfx_names: 267 | if track.name not in sfx_names: 268 | logging.error( 269 | f"MIDI Track '{track.name}' not found in sfx-names.") 270 | return None 271 | sfx_idx = sfx_names[track.name] 272 | elif sfx_idx > 63: 273 | logging.warning( 274 | "MIDI file contains over 64 tracks. Discarded excess tracks.") 275 | break 276 | messages.extend( 277 | (MessageExt(msg, sfx_idx) for msg in _to_abstime(track))) 278 | messages.sort(key=lambda msge: msge.msg.time) 279 | return messages 280 | 281 | 282 | def _calc_tempo(messages: Sequence[MessageExt]) -> int: 283 | return next( 284 | (msge.msg.tempo 285 | for msge in reversed(messages) if msge.msg.type == "set_tempo"), 286 | 500000) 287 | 288 | 289 | def _terminate(pc: PatternChunk, frame: Frame, pattern_row_idx: int) -> None: 290 | for channel_idx in range(4): 291 | if (pattern_idx := frame.get_ch(channel_idx)) != -1: 292 | pc.patterns[pattern_idx].rows[pattern_row_idx].note = 1 293 | logging.info("Added terminator to end of track.") 294 | 295 | 296 | def convert(mid: mido.MidiFile, 297 | tc: TrackChunk, 298 | pc: PatternChunk, 299 | resolution: int = 4, 300 | sfx_names: Optional[dict] = None, 301 | track_idx: int = 0, 302 | octave_shift: int = 0, 303 | replacement_policy: str = 'fifo', 304 | terminate: bool = True) -> bool: 305 | start_time = time.time() 306 | 307 | messages = _preprocess_messages(mid, sfx_names) 308 | if messages is None: 309 | return False 310 | tempo = _calc_tempo(messages) 311 | messages = filter(lambda msge: not msge.msg.is_meta, 312 | messages) # Remove MetaMessages 313 | 314 | track = tc.tracks[track_idx] 315 | track.speed = resolution + 2 316 | track.tempo = int(mido.tempo2bpm(tempo)) 317 | 318 | frame_idx = -1 319 | next_unused_pattern = 0 320 | scale = [4, 2, 1.5, 1.2, 1, .85, .75, .675][resolution] 321 | channel_state = ChannelState() 322 | 323 | try: 324 | for msge in messages: 325 | msg = msge.msg 326 | if msg.type not in {"note_on", "note_off"}: 327 | continue 328 | 329 | pattern_row_idx = int(msg.time * 4 * scale / mid.ticks_per_beat) 330 | frame_idx = pattern_row_idx // 64 331 | if frame_idx > 15: 332 | logging.warning("Used all available frames in track.") 333 | raise StopIteration() 334 | pattern_row_idx %= 64 335 | frame = track.frames[frame_idx] 336 | 337 | if msg.type == "note_on": 338 | channel_idx = channel_state.calc_note_on_channel_placement( 339 | msge, replacement_policy) 340 | if channel_idx == -1: 341 | continue 342 | 343 | # Assign pattern to channel if unassigned 344 | if frame.get_ch(channel_idx) == -1: 345 | if next_unused_pattern >= 60: 346 | logging.warning("Used all available patterns.") 347 | raise StopIteration() 348 | frame.set_ch(channel_idx, next_unused_pattern) 349 | next_unused_pattern += 1 350 | 351 | row = pc.patterns[frame.get_ch( 352 | channel_idx)].rows[pattern_row_idx] 353 | note_scaled = max(0, msg.note - 24) 354 | volume = msg.velocity // 8 355 | octave = note_scaled // 12 + octave_shift 356 | if not 0 <= octave <= 7: 357 | logging.warning( 358 | f"track {track_idx}:frame {frame_idx}" 359 | f":channel {channel_idx + 1}:row {pattern_row_idx}" 360 | f":Note with octave {octave} is beyond playable range." 361 | "Consider using '--octave-shift'.") 362 | octave = max(0, min(7, octave)) 363 | 364 | row.set(note_scaled % 12 + 4, volume, volume, 1, msge.sfx, 365 | octave) 366 | channel_state.channels[channel_idx].set( 367 | msg.note, msge.sfx, msg.time) 368 | else: 369 | channel_idx = channel_state.index(msg.note, msge.sfx) 370 | if channel_idx == -1: 371 | continue 372 | 373 | pc.patterns[frame.get_ch( 374 | channel_idx)].rows[pattern_row_idx].note = 1 375 | channel_state.channels[channel_idx].set(0, 0, msg.time) 376 | except StopIteration: 377 | logging.warning("Terminated early.") 378 | 379 | frame_idx = min(15, frame_idx) 380 | pattern_row_idx = min(63, pattern_row_idx) 381 | 382 | if terminate: 383 | _terminate(pc, track.frames[frame_idx], pattern_row_idx) 384 | 385 | # Print summary 386 | logging.info( 387 | "===== Summary =====" 388 | "\nConverted" 389 | f" {mido.tick2second(msg.time, mid.ticks_per_beat, tempo):.2f}" 390 | f" seconds of music in {1000 * (time.time() - start_time):.2f} millis." 391 | f"\nUsed {frame_idx + 1}/16 frames on track {track_idx}." 392 | f"\nUsed {min(60, next_unused_pattern)}/60 patterns." 393 | f"\nEnded on row {pattern_row_idx} on frame {min(15, frame_idx)}.") 394 | 395 | return True 396 | 397 | 398 | def tic_save(filename: str, 399 | track_chunk: TrackChunk, 400 | pattern_chunk: PatternChunk, 401 | insert: bool = False) -> None: 402 | if insert: 403 | filename_new = f"{filename}.new" 404 | with open(filename_new, "wb") as fd: 405 | with open(filename, "r+b") as fs: 406 | for header in iter(lambda: fs.read(4), b''): 407 | chunk = Chunk.from_binary(tuple(header)) 408 | if ((chunk.chunk_type == 14 409 | and chunk.bank == track_chunk.bank) 410 | or (chunk.chunk_type == 15 411 | and chunk.bank == pattern_chunk.bank)): 412 | fs.seek(chunk.size, os.SEEK_CUR) 413 | else: 414 | fs.seek(-4, os.SEEK_CUR) 415 | fd.write(fs.read(chunk.size + 4)) 416 | fd.write(bytearray(track_chunk.serialize())) 417 | fd.write(bytearray(pattern_chunk.serialize())) 418 | os.replace(filename_new, filename) 419 | else: 420 | with open(filename, "wb") as f: 421 | f.write(bytearray(Chunk(17, 0).serialize())) 422 | f.write(bytearray(track_chunk.serialize())) 423 | f.write(bytearray(pattern_chunk.serialize())) 424 | 425 | logging.info(f"Saved to {filename}.") 426 | 427 | 428 | if __name__ == "__main__": 429 | logging.basicConfig(level=logging.INFO) 430 | random.seed() 431 | 432 | # Parse arguments 433 | parser = argparse.ArgumentParser( 434 | prog='tic-midi', 435 | description='Convert a MIDI file to a TIC-80 cartridge.', 436 | formatter_class=argparse.ArgumentDefaultsHelpFormatter) 437 | parser.add_argument('input') 438 | parser.add_argument('-v', 439 | '--version', 440 | action='version', 441 | version=VERSION_STRING, 442 | help=f"show version: {VERSION_STRING}") 443 | parser.add_argument('-o', '--output', required=True) 444 | parser.add_argument( 445 | '--resolution', 446 | default=4, 447 | type=int, 448 | help="Accepted values: [0,7]. Determines how many notes will be used" 449 | "per beat. Lower values use more space but can be more detailed.") 450 | parser.add_argument( 451 | '--sfx-names', 452 | default="{}", 453 | help="Accepts a dict in of the form {'MIDI Track Name':sfx_index}." 454 | " Used to map MIDI tracks to specific sfx.") 455 | parser.add_argument('--track', 456 | default=0, 457 | type=int, 458 | help="Accepted values: [0,7].") 459 | parser.add_argument('--bank', default=0, type=int, help="Memory bank.") 460 | parser.add_argument('--octave-shift', 461 | default=0, 462 | type=int, 463 | help="Shift all notes by some number of octaves.") 464 | parser.add_argument( 465 | '--replacement-policy', 466 | choices={'random', 'fifo', 'lifo', 'none'}, 467 | default='fifo', 468 | help="Determines note placement in channels when all channels are in" 469 | " use.") 470 | parser.add_argument( 471 | '--no-terminator', 472 | action='store_true', 473 | help="Do not end playback on all channels at the end of tracks.") 474 | ins_or_ovr = parser.add_mutually_exclusive_group() 475 | ins_or_ovr.add_argument( 476 | '--insert', 477 | action='store_true', 478 | help="Insert Track and Pattern Chunks into an existing cartridge while" 479 | " leaving remaining chunks intact.") 480 | ins_or_ovr.add_argument( 481 | '--overwrite', 482 | action='store_true', 483 | help="Overwrite an existing cartridge if it exists.") 484 | args = parser.parse_args() 485 | 486 | # Validate arguments 487 | if not args.output.endswith(".tic"): 488 | args.output += ".tic" 489 | args.resolution = max(0, min(7, args.resolution)) 490 | args.sfx_names = eval(args.sfx_names) 491 | if not isinstance(args.sfx_names, dict): 492 | logging.error("sfx-names is not a dict.") 493 | sys.exit(1) 494 | args.track = max(0, min(7, args.track)) 495 | args.bank = max(0, min(7, args.bank)) 496 | 497 | output_file_exists = os.path.isfile(args.output) 498 | if output_file_exists and not args.overwrite and not args.insert: 499 | logging.error( 500 | f"Cartridge '{args.output}' already exists. Use '--overwrite' to" 501 | "overwrite.") 502 | sys.exit(1) 503 | elif not output_file_exists and args.insert: 504 | logging.error( 505 | f"Cartridge '{args.output}' does not exist, but is required by" 506 | " '--insert'.") 507 | sys.exit(1) 508 | 509 | # Run conversion and save 510 | tc = TrackChunk(bank=args.bank) 511 | pc = PatternChunk(bank=args.bank) 512 | 513 | converted = convert(mido.MidiFile(args.input), 514 | tc, 515 | pc, 516 | resolution=args.resolution, 517 | sfx_names=args.sfx_names, 518 | track_idx=args.track, 519 | octave_shift=args.octave_shift, 520 | replacement_policy=args.replacement_policy, 521 | terminate=not args.no_terminator) 522 | if not converted: 523 | sys.exit(1) 524 | 525 | tic_save(args.output, tc, pc, insert=args.insert) 526 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. 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Remote Network Interaction; Use with the GNU General Public License. 541 | 542 | Notwithstanding any other provision of this License, if you modify the 543 | Program, your modified version must prominently offer all users 544 | interacting with it remotely through a computer network (if your version 545 | supports such interaction) an opportunity to receive the Corresponding 546 | Source of your version by providing access to the Corresponding Source 547 | from a network server at no charge, through some standard or customary 548 | means of facilitating copying of software. This Corresponding Source 549 | shall include the Corresponding Source for any work covered by version 3 550 | of the GNU General Public License that is incorporated pursuant to the 551 | following paragraph. 552 | 553 | Notwithstanding any other provision of this License, you have 554 | permission to link or combine any covered work with a work licensed 555 | under version 3 of the GNU General Public License into a single 556 | combined work, and to convey the resulting work. The terms of this 557 | License will continue to apply to the part which is the covered work, 558 | but the work with which it is combined will remain governed by version 559 | 3 of the GNU General Public License. 560 | 561 | 14. Revised Versions of this License. 562 | 563 | The Free Software Foundation may publish revised and/or new versions of 564 | the GNU Affero General Public License from time to time. Such new versions 565 | will be similar in spirit to the present version, but may differ in detail to 566 | address new problems or concerns. 567 | 568 | Each version is given a distinguishing version number. If the 569 | Program specifies that a certain numbered version of the GNU Affero General 570 | Public License "or any later version" applies to it, you have the 571 | option of following the terms and conditions either of that numbered 572 | version or of any later version published by the Free Software 573 | Foundation. If the Program does not specify a version number of the 574 | GNU Affero General Public License, you may choose any version ever published 575 | by the Free Software Foundation. 576 | 577 | If the Program specifies that a proxy can decide which future 578 | versions of the GNU Affero General Public License can be used, that proxy's 579 | public statement of acceptance of a version permanently authorizes you 580 | to choose that version for the Program. 581 | 582 | Later license versions may give you additional or different 583 | permissions. However, no additional obligations are imposed on any 584 | author or copyright holder as a result of your choosing to follow a 585 | later version. 586 | 587 | 15. Disclaimer of Warranty. 588 | 589 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597 | 598 | 16. Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608 | SUCH DAMAGES. 609 | 610 | 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published by 637 | the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | --------------------------------------------------------------------------------