.github/workflows/build.yml

@@ -0,0 +1,44 @@
+name: Build CI
+
+on:
+    push:
+    pull_request:
+    release:
+        types: [published]
+    check_suite:
+        types: [rerequested]
+
+jobs:
+    test:
+        runs-on: ubuntu-18.04
+
+        steps:
+            - name: checkout
+              uses: actions/checkout@v2
+              with:
+                submodules: true
+
+            - name: install dependencies
+              run: |
+                sudo apt-get update
+                sudo apt-get --no-install-recommends -y install build-essential git cc65
+
+            - name: build
+              run: |
+                make -C c2t
+                docker run --rm -v $(pwd):/src -u $(id -u):$(id -g) emscripten/emsdk ./build.sh
+
+            - if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+              name: publish
+              run: |
+                git branch -D gh-pages || true
+                python3 import.py | git fast-import --date-format=now
+                git config user.email "jeff@adafruit.com"
+                git config user.name "Jeff Epler (Adafruit) via github actions"
+                git remote set-url --push origin https://jepler:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}
+                git push -f origin gh-pages
+
+            - uses: actions/upload-artifact@v2
+              with:
+                name: Web pages
+                path: output/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "c2t"]
+	path = c2t
+	url = https://github.com/jepler/c2t

CODE_OF_CONDUCT.md

@@ -0,0 +1,135 @@
+<!--
+SPDX-FileCopyrightText: 2014 Coraline Ada Ehmke
+SPDX-FileCopyrightText: 2019 Kattni Rembor for Adafruit Industries
+
+SPDX-License-Identifier: CC-BY-4.0
+-->
+# Adafruit Community Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and leaders pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level or type of
+experience, education, socio-economic status, nationality, personal appearance,
+race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+We are committed to providing a friendly, safe and welcoming environment for
+all.
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Be kind and courteous to others
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Collaborating with other community members
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and sexual attention or advances
+* The use of inappropriate images, including in a community member's avatar
+* The use of inappropriate language, including in a community member's nickname
+* Any spamming, flaming, baiting or other attention-stealing behavior
+* Excessive or unwelcome helping; answering outside the scope of the question
+  asked
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Promoting or spreading disinformation, lies, or conspiracy theories against
+  a person, group, organisation, project, or community
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate
+
+The goal of the standards and moderation guidelines outlined here is to build
+and maintain a respectful community. We ask that you don’t just aim to be
+"technically unimpeachable", but rather try to be your best self.
+
+We value many things beyond technical expertise, including collaboration and
+supporting others within our community. Providing a positive experience for
+other community members can have a much more significant impact than simply
+providing the correct answer.
+
+## Our Responsibilities
+
+Project leaders are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project leaders have the right and responsibility to remove, edit, or
+reject messages, comments, commits, code, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any community member for other behaviors that they deem
+inappropriate, threatening, offensive, or harmful.
+
+## Moderation
+
+Instances of behaviors that violate the Adafruit Community Code of Conduct
+may be reported by any member of the community. Community members are
+encouraged to report these situations, including situations they witness
+involving other community members.
+
+You may report in the following ways:
+
+In any situation, you may send an email to <support@adafruit.com>.
+
+On the Adafruit Discord, you may send an open message from any channel
+to all Community Moderators by tagging @community moderators. You may
+also send an open message from any channel, or a direct message to
+@kattni#1507, @tannewt#4653, @danh#1614, @cater#2442,
+@sommersoft#0222, @Mr. Certainly#0472 or @Andon#8175.
+
+Email and direct message reports will be kept confidential.
+
+In situations on Discord where the issue is particularly egregious, possibly
+illegal, requires immediate action, or violates the Discord terms of service,
+you should also report the message directly to Discord.
+
+These are the steps for upholding our community’s standards of conduct.
+
+1. Any member of the community may report any situation that violates the
+Adafruit Community Code of Conduct. All reports will be reviewed and
+investigated.
+2. If the behavior is an egregious violation, the community member who
+committed the violation may be banned immediately, without warning.
+3. Otherwise, moderators will first respond to such behavior with a warning.
+4. Moderators follow a soft "three strikes" policy - the community member may
+be given another chance, if they are receptive to the warning and change their
+behavior.
+5. If the community member is unreceptive or unreasonable when warned by a
+moderator, or the warning goes unheeded, they may be banned for a first or
+second offense. Repeated offenses will result in the community member being
+banned.
+
+## Scope
+
+This Code of Conduct and the enforcement policies listed above apply to all
+Adafruit Community venues. This includes but is not limited to any community
+spaces (both public and private), the entire Adafruit Discord server, and
+Adafruit GitHub repositories. Examples of Adafruit Community spaces include
+but are not limited to meet-ups, audio chats on the Adafruit Discord, or
+interaction at a conference.
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. As a community
+member, you are representing our community, and are expected to behave
+accordingly.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 1.4, available at
+<https://www.contributor-covenant.org/version/1/4/code-of-conduct.html>,
+and the [Rust Code of Conduct](https://www.rust-lang.org/en-US/conduct.html).
+
+For other projects adopting the Adafruit Community Code of
+Conduct, please contact the maintainers of those projects for enforcement.
+If you wish to use this code of conduct for your own project, consider
+explicitly mentioning your moderation policy or making a copy with your
+own moderation policy so as to avoid confusion.

CONTRIBUTING.md

@@ -0,0 +1,22 @@
+<!--
+SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
+
+SPDX-License-Identifier: MIT
+-->
+
+# Contributing
+Please note that this project is released with a
+[Contributor Code of Conduct](CODE_OF_CONDUCT.md).
+By participating in this project you agree to abide by its terms. Participation
+covers any forum used to converse about CircuitPython including unofficial and official spaces. Failure to do
+so will result in corrective actions such as time out or ban from the project.
+
+## Licensing
+By contributing to this repository you are certifying that you have all necessary
+permissions to license the code under the Open Group License. You still retain the
+copyright but are granting many permissions under the Open Group License.
+For the full license text, see the COPYING file.
+
+If you have an employment contract with your employer please make sure that they
+don't automatically own your work product. Make sure to get any necessary approvals
+before contributing. Another term for this contribution off-hours is moonlighting.

README.md

@@ -0,0 +1,6 @@
+# web-c2t
+Convert Apple diskette images to audio files directly in your browser
+
+This is inspired by the [Ascii Express Apple Disk Server](https://asciiexpress.net/diskserver/) and uses its same core code, [c2t](https://github.com/datajerk/c2t).
+
+This project is built with emscripten; for details, see the github actions files that implement the CI and deployment workflow.

build.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+[ -d output ] || mkdir output
+
+make -C c2t c2t.h
+emcc -O -Wall -Werror -Wno-unused -s TOTAL_MEMORY=$((2<<28)) -s SAFE_HEAP=1 -s STACK_OVERFLOW_CHECK=1 -s ASSERTIONS=2 -s FORCE_FILESYSTEM=1 -s EXPORTED_RUNTIME_METHODS="['ccall']" -DPACKAGE_STRING=\"bdftopcf\" -Ic2t wrap_c2t.c -o output/index.html --shell-file shell.html

c2t

@@ -0,0 +1 @@
+Subproject commit b459cc1b2a537f72f83890e7ff384218438d628c

import.py

@@ -0,0 +1,30 @@
+#!/usr/bin/python3
+import argparse
+import glob
+import os
+import subprocess
+import sys
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument("branch", default="gh-pages", nargs="?")
+args = parser.parse_args()
+
+version = subprocess.getoutput("git describe --always")
+
+fd = os.fdopen(sys.stdout.fileno(), 'wb')
+
+fd.write(b"commit refs/heads/" + args.branch.encode('utf-8') + b"\n")
+fd.write(b"committer Doc Man <noreply@example.com> now" + b"\n")
+fd.write(b"data <<EOF" + b"\n")
+fd.write(b"Docs built at " + version.encode('utf-8') + b"\n")
+fd.write(b"EOF" + b"\n")
+
+files = glob.glob("output/*")
+for fn in files:
+    with open(fn, 'rb') as f: contents = f.read()
+    fd.write(b"M 644 inline " + os.path.basename(fn).encode('utf-8') + b"\n")
+    fd.write(b"data " + str(len(contents)).encode("utf-8") + b"\n")
+    fd.write(contents)
+fd.write(b"done\n")
+

server.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+import http.server
+import socketserver
+
+PORT = 4242
+
+Handler = http.server.SimpleHTTPRequestHandler
+Handler.extensions_map[".wasm"] = "application/wasm"
+
+with socketserver.TCPServer(("", PORT), Handler) as httpd:
+    print("serving at port", PORT)
+    httpd.serve_forever()

shell.html

@@ -0,0 +1,197 @@
+<!doctype html>
+<html lang="en-us">
+  <head>
+    <meta charset="utf-8">
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>c2t wavefile generator</title>
+    <style>
+      form label, form button {
+        background-color: #7F9CCB;
+        padding: 5px 10px;
+        border-radius: 5px;
+        border: 1px ridge black;
+        font-size: 0.8rem;
+        height: auto;
+      }
+
+      .emscripten { display: block; }
+      textarea.emscripten { font-family: monospace; width: 80%; }
+      div.emscripten_border { border: 1px solid black; }
+      /* the canvas *must not* have any border or padding, or mouse coords will be wrong */
+      canvas.emscripten { border: 0px none; background-color: black; }
+
+      .spinner {
+        height: 50px;
+        width: 50px;
+        margin: 0px auto;
+        -webkit-animation: rotation .8s linear infinite;
+        -moz-animation: rotation .8s linear infinite;
+        -o-animation: rotation .8s linear infinite;
+        animation: rotation 0.8s linear infinite;
+        border-left: 10px solid rgb(0,150,240);
+        border-right: 10px solid rgb(0,150,240);
+        border-bottom: 10px solid rgb(0,150,240);
+        border-top: 10px solid rgb(100,0,200);
+        border-radius: 100%;
+        background-color: rgb(200,100,250);
+      }
+      @-webkit-keyframes rotation {
+        from {-webkit-transform: rotate(0deg);}
+        to {-webkit-transform: rotate(360deg);}
+      }
+      @-moz-keyframes rotation {
+        from {-moz-transform: rotate(0deg);}
+        to {-moz-transform: rotate(360deg);}
+      }
+      @-o-keyframes rotation {
+        from {-o-transform: rotate(0deg);}
+        to {-o-transform: rotate(360deg);}
+      }
+      @keyframes rotation {
+        from {transform: rotate(0deg);}
+        to {transform: rotate(360deg);}
+      }
+
+    </style>
+  </head>
+  <body>
+      <p>Convert an apple2 5.25 floppy file to wave format for uploading via the tape interface.</p>
+
+    <figure style="overflow:visible;" id="spinner"><div class="spinner"></div><center style="margin-top:0.5em"><strong>emscripten</strong></center></figure>
+    <div class="emscripten" id="status">Downloading...</div>
+    <div class="emscripten">
+      <progress value="0" max="100" id="progress" hidden=1></progress>
+    </div>
+
+    <form method="POST" enctype="multipart/form-data">
+        <label for="diskfile">Browse</label><input type="file" id="diskfile" name="diskfile" accept=".po,.do,.dsk" style="opacity:0"/>
+        <br>
+        <!-- <input type="submit" value="Convert" onSubmit="return convert_me()"/> -->
+    </form>
+    <br/>
+
+    <p>Use the resulting audio as described at <a href="https://asciiexpress.net/diskserver/">the asciiexpress diskserver</a>:</p>
+<ol>
+<li>Remove any floppies.
+<li>Power on your ][+ or //e.
+<li>Press CONTROL-RESET.
+<li>Connect your phone/computer headphone jack to the cassette input jack (it's next to the joystick port).
+<li>Set your phone/computer to MAX volume.
+<li>Insert a blank diskette (S6D1).
+<li><strike>Select a disk from the list to the left.</strike>
+<li>At the "]" prompt type "LOAD" and press RETURN.
+<li>Press the play button.  <strike>If problems with HIFI, use 8KFI.</strike>
+</ol>
+<p>Note: 8KFI is not available here yet.</p>
+
+<p>Due to boooogs the audio may be erroneously reported as very long (affects Firefox 97 on Linux). It is typically under 3 minutes.</p>
+<div id="player"></div>
+
+    <textarea class="emscripten" id="output" rows="8"></textarea>
+
+    <script type='text/javascript'>
+      function downloadData(name, data) {
+          var as_str = Array.from(data).map((c)=>String.fromCharCode(c)).join("")
+          var datauri = "data:audio/x-wav;base64," + btoa(as_str)
+          var audio = document.createElement("audio");
+          audio.controls = true;  
+          audio.src=datauri
+          container = document.getElementById("player")
+          container.innerHTML = ''
+          container.appendChild(audio)
+      }
+
+      document.querySelector('#diskfile').addEventListener('change', (event) => {
+      var file = document.getElementById("diskfile");
+      if (file.files.length) {
+          var reader = new FileReader();
+          reader.onload = function(e) {
+              var ifn = file.value.replace(/.*[/\\]/, "");
+              var ofn = "output.wav";
+              FS.writeFile(ifn, new Uint8Array(e.target.result))
+              var result = Module.ccall("wave_convert", "number", ["string"], [ifn]) // _wave_convert(ifn_c);
+              if(result != 0) {
+                  downloadData(ofn, FS.readFile("/output.wav"));
+              }
+          }
+          reader.readAsArrayBuffer(file.files[0]);
+      }
+      return false;
+      });
+      var statusElement = document.getElementById('status');
+      var progressElement = document.getElementById('progress');
+      var spinnerElement = document.getElementById('spinner');
+      var outputElement = document.getElementById('output');
+
+      var Module = {
+        preRun: [],
+        postRun: [],
+        print: (function() {
+          var element = document.getElementById('output');
+          if (element) element.value = ''; // clear browser cache
+          return function(text) {
+            if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
+            // These replacements are necessary if you render to raw HTML
+            //text = text.replace(/&/g, "&amp;");
+            //text = text.replace(/</g, "&lt;");
+            //text = text.replace(/>/g, "&gt;");
+            //text = text.replace('\n', '<br>', 'g');
+            console.log(text);
+            if (element) {
+              element.style = ""
+              element.value += text + "\n";
+              element.scrollTop = element.scrollHeight; // focus on bottom
+            }
+          };
+        })(),
+        printErr: function(text) {
+          if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
+          if (0) { // XXX disabled for safety typeof dump == 'function') {
+            dump(text + '\n'); // fast, straight to the real console
+          } else {
+            outputElement.style = ""
+            outputElement.value += text + "\n";
+            outputElement.scrollTop = outputElement.scrollHeight; // focus on bottom
+            console.error(text);
+          }
+        },
+        setStatus: function(text) {
+          if (!Module.setStatus.last) Module.setStatus.last = { time: Date.now(), text: '' };
+          if (text === Module.setStatus.last.text) return;
+          var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
+          var now = Date.now();
+          if (m && now - Module.setStatus.last.time < 30) return; // if this is a progress update, skip it if too soon
+          Module.setStatus.last.time = now;
+          Module.setStatus.last.text = text;
+          if (m) {
+            text = m[1];
+            progressElement.value = parseInt(m[2])*100;
+            progressElement.max = parseInt(m[4])*100;
+            progressElement.hidden = false;
+            spinnerElement.hidden = false;
+          } else {
+            progressElement.value = null;
+            progressElement.max = null;
+            progressElement.hidden = true;
+            if (!text) spinnerElement.hidden = true;
+          }
+          statusElement.innerHTML = text;
+        },
+        totalDependencies: 0,
+        monitorRunDependencies: function(left) {
+          this.totalDependencies = Math.max(this.totalDependencies, left);
+          Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
+        }
+      };
+      Module.setStatus('Downloading...');
+      window.onerror = function() {
+        Module.setStatus('Exception thrown, see JavaScript console');
+        spinnerElement.style.display = 'none';
+        Module.setStatus = function(text) {
+          if (text) Module.printErr('[post-exception status] ' + text);
+        };
+      };
+    </script>
+    {{{ SCRIPT }}}
+  </body>
+</html>

wrap_c2t.c

@@ -0,0 +1,16 @@
+#define main c2t_main
+#include "c2t/c2t-96h.c"
+#undef main
+
+#include <emscripten.h>   
+
+int main(int argc, char *argv[]) {}
+
+EMSCRIPTEN_KEEPALIVE
+int wave_convert(char *input_name) {
+    static char program_name[] = "c2t-96h",
+                dashb[] = "-b",
+                output_name[]="/output.wav";
+    char *args[] = { program_name, dashb, input_name, output_name, 0 };
+    return c2t_main(4, args) == 0;
+}