Add pause support to midi conversion

I have spent some time (like two hours) fixing up the app, getting it up
to a somewhat better level. Code is still bad, but that's that. If
anybody is interested to make the code neater, feel free to open a PR!

.gitignore

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+__pycache__

LICENSE

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+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,30 +1,66 @@
-# midi-micro-bit_sound-converter
+<div id="title" align="center">
+    <h1>Midi to Micro:bit Sound converter</h1>
+</div>
+
+<div id="badges" align="center">
+    <img src="https://img.shields.io/github/license/janishutz/midi-micro-bit_sound-converter.svg">
+    <img src="https://img.shields.io/github/repo-size/janishutz/midi-micro-bit_sound-converter.svg">
+    <img src="https://img.shields.io/github/languages/top/janishutz/midi-micro-bit_sound-converter">
+    <img src="https://img.shields.io/github/directory-file-count/janishutz/midi-micro-bit_sound-converter.svg">
+    <br>
+    <img alt="GitHub Repo stars" src="https://img.shields.io/github/stars/janishutz/midi-micro-bit_sound-converter">
+    <img alt="GitHub watchers" src="https://img.shields.io/github/watchers/janishutz/midi-micro-bit_sound-converter">
+    <img src="https://img.shields.io/github/issues-pr-raw/janishutz/midi-micro-bit_sound-converter">
+    <img alt="GitHub forks" src="https://img.shields.io/github/forks/janishutz/midi-micro-bit_sound-converter">
+    <img alt="GitHub commit activity" src="https://img.shields.io/github/commit-activity/m/janishutz/midi-micro-bit_sound-converter">
+    <br>
+    <img alt="GitHub all releases" src="https://img.shields.io/github/downloads/janishutz/midi-micro-bit_sound-converter/total?label=Downloads (total)">
+    <img alt="GitHub release (latest by date)" src="https://img.shields.io/github/downloads/janishutz/midi-micro-bit_sound-converter/latest/total?label=Downloads (latest)">
+    <img src="https://img.shields.io/github/release/janishutz/midi-micro-bit_sound-converter.svg">
+    <img src="https://img.shields.io/github/package-json/v/janishutz/midi-micro-bit_sound-converter.svg?label=Development Version">
+</div>
+
 This app allows you to convert a midi file to the code needed for micro:bit programming
 
 Creating Music with the micro:bit is a hassle. This little app will allow you to take any midi-file and convert it into the list needed for micro:bit. 
 
-## INSTALLATION:
+# Installation
-Download the files by clicking on code, then on zip.
+Download the files by clicking on code, then on zip or clone the repo locally using 
-You will need to install some dependencies, as well as python 3.8. If you haven't already go ahead and download python 3.8 and make sure to also include pip,
+```
-as this will be used right after. Now, you will need to type the following commands in the terminal / command prompt: 
+git clone https://github.com/janishutz/midi-micro-bit_sound-converter
-pip install kivy[base]
+```
-pip install kivymd
-pip install pyperclip
-pip install mido
 
-You can run the app by heading into the folder you downloaded the zip file into, unzipping it and then by running the midi-converter.py file in the terminal 
+Then, run 
-/ command prompt. 
+```
-You may do this as follows:
+pip install -r requirements.txt
-### Linux and MacOS:
+```
-Use cd./Path/To/File
+in the repo's folder (i.e. the folder you just cloned or downloaded and extracted)
 
-### Windows:
+Alternatively, create a venv using
-Click on the navigation bar (the one where the path is displayed) and type: cmd
+```
+python -m venv midi-converter
+```
+
+and activate it using
+```
+source ./midi-converter/bin/active
+```
+
+The dependencies of this project are `mido`, `pyperclip`, `kivymd` and `kivy[base]`
 
 
-### SPECIAL notes for Linux users:
+# Running
-You'll need to install some other dependencies first. Use your distro's package manager (apt-get for Debian based distros, dnf for Fedora based and pacman for
+Open a terminal in the file location where you saved / cloned this repo to. Type 
-arch-based distros). I'll show an example with debian based distros here:
+```
-sudo apt-get install xclip
+python midi_converter.py
-sudo apt-get install xsel
+```
-sudo apt-get install wl-clipboard
+
+to run the app
+
+
+## Notes for Linux users:
+On some Linux distros, `xclip` and `xsel` don't come pre-installed. Install these dependencies.
+
+
+# Development
+Be warned, the code base is still very ugly. I only spent about two hours cleaning up the old code, so it still looks ugly. I will probably not clean up the code much more. Some variable names will simply stay weird

backend/csv_parsers.py

@@ -1,122 +0,0 @@
-"""@package docstring
-This is a simplification of the csv module"""
-
-import csv
-
-
-class CsvRead:
-    """This is a class that reads csv files and depending on the module selected does do different things with it"""
-    def __init__(self):
-        self.__imp = ""
-        self.__raw = ""
-        self.__raw_list = ""
-
-    def importing(self, path):
-        """Returns a list of the imported csv-file, requires path, either direct system path or relative path"""
-        self.__imp = open(path)
-        self.__raw = csv.reader(self.__imp, delimiter=',')
-        self.__raw_list = list(self.__raw)
-        self.__imp.close()
-        return self.__raw_list
-
-
-class CsvWrite:
-    """This is a class that modifies csv files"""
-    def __init__(self):
-        self.__impl = []
-        self.__strpop = []
-        self.__removed = []
-        self.__removing = 0
-        self.__change = 0
-        self.__appending = 0
-        self.__imp = []
-        self.__raw = []
-
-    def rem_str(self, path, row):
-        """Opens the csv-file in write mode which is specified as an argument either as direct or relative path"""
-        self.__imp = open(path)
-        self.__raw = csv.reader(self.__imp, delimiter=',')
-        self.__impl = list(self.__raw)
-        self.__removed = self.__impl.pop(row + 1)
-        with open(path, "w") as removedata:
-            self.__removing = csv.writer(removedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-            self.__removing.writerow(self.__impl.pop(0))
-        while len(self.__impl) > 0:
-            with open(path, "a") as removedata:
-                self.__removing = csv.writer(removedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-                self.__removing.writerow(self.__impl.pop(0))
-        self.__imp.close()
-        removedata.close()
-
-
-    def chg_str(self, path, row, pos, new_value):
-        """Opens the csv-file in write mode to change a value, e.g. if a recipes is changed."""
-        self.__imp = open(path)
-        self.__raw = csv.reader(self.__imp, delimiter=',')
-        self.__impl = list(self.__raw)
-        self.__strpop = self.__impl.pop(row)
-        self.__strpop.pop(pos)
-        self.__strpop.insert(pos, new_value)
-        self.__impl.insert(row, self.__strpop)
-        with open(path, "w") as changedata:
-            self.__change = csv.writer(changedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-            self.__change.writerow(self.__impl.pop(0))
-        while len(self.__impl) > 0:
-            with open(path, "a") as changedata:
-                self.__removing = csv.writer(changedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-                self.__removing.writerow(self.__impl.pop(0))
-        self.__imp.close()
-        changedata.close()
-
-    def chg_str_rem(self, path, row, pos):
-        """Opens the csv-file in write mode to change a value, e.g. if a recipes is changed."""
-        self.__imp = open(path)
-        self.__raw = csv.reader(self.__imp, delimiter=',')
-        self.__impl = list(self.__raw)
-        self.__strpop = self.__impl.pop(row)
-        self.__strpop.pop(pos)
-        self.__strpop.pop(pos)
-        self.__impl.insert(row, self.__strpop)
-        with open(path, "w") as changedata:
-            self.__change = csv.writer(changedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-            self.__change.writerow(self.__impl.pop(0))
-        while len(self.__impl) > 0:
-            with open(path, "a") as changedata:
-                self.__removing = csv.writer(changedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-                self.__removing.writerow(self.__impl.pop(0))
-        self.__imp.close()
-        changedata.close()
-
-    def chg_str_add(self, path, row, new_value1, new_value2):
-        """Opens the csv-file in write mode to change a value, e.g. if a recipes is changed."""
-        self.__imp = open(path)
-        self.__raw = csv.reader(self.__imp, delimiter=',')
-        self.__impl = list(self.__raw)
-        self.__strpop = self.__impl.pop(row)
-        self.__strpop.append(new_value1)
-        self.__strpop.append(new_value2)
-        self.__impl.insert(row, self.__strpop)
-        with open(path, "w") as changedata:
-            self.__change = csv.writer(changedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-            self.__change.writerow(self.__impl.pop(0))
-        while len(self.__impl) > 0:
-            with open(path, "a") as changedata:
-                self.__removing = csv.writer(changedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-                self.__removing.writerow(self.__impl.pop(0))
-        self.__imp.close()
-        changedata.close()
-
-    def app_str(self, path, value):
-        """Opens the csv-file in append mode and writes given input. CsvWrite.app_str(path, value).
-        Path can be specified both as direct or relative. value is a list. Will return an error if type of value is
-        not a list."""
-        with open(path, "a") as appenddata:
-            self.__appending = csv.writer(appenddata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-            self.__appending.writerow(value)
-        appenddata.close()
-
-    def write_str(self, path, value):
-        with open(path, "w") as writedata:
-            self.__change = csv.writer(writedata, delimiter=',', quoting=csv.QUOTE_MINIMAL)
-            self.__change.writerow(value)
-        writedata.close()

backend/midi_management.py

@@ -1,78 +0,0 @@
-from mido import MidiFile
-import pyperclip as pc
-
-
-class MidiManagement:
-    def __init__(self):
-        pass
-
-    def addToClipboard(self, text):
-        pc.copy(text)
-
-    def analyse_track(self, path, trackname):
-        self.midi_imp = MidiFile(path, clip=True)
-        self.tracks = []
-        for self.track in self.midi_imp.tracks:
-            self.tracks.append(str(self.track))
-        self.tracks.pop(0)
-        self.track_ext = self.tracks.pop(0)
-        self.trackn = 0
-        while self.track_ext != trackname:
-            self.track_ext = self.tracks.pop(0)
-            self.trackn += 1
-        self.extracted_track = self.track_ext
-        self.__output_list = []
-        for self.msg in self.midi_imp.tracks[self.trackn]:
-            self.ext = str(self.msg)
-            self.note = self.ext[23:25]
-            try:
-                self.note_height = int(self.note)
-                self.note_decod_oct = self.note_height // 12
-                self.note_decode_tone = self.note_height % 12
-                if self.note_decode_tone == 1:
-                    self.note_ext = "C"
-                elif self.note_decode_tone == 2:
-                    self.note_ext = "C#"
-                elif self.note_decode_tone == 3:
-                    self.note_ext = "D"
-                elif self.note_decode_tone == 4:
-                    self.note_ext = "D#"
-                elif self.note_decode_tone == 5:
-                    self.note_ext = "E"
-                elif self.note_decode_tone == 6:
-                    self.note_ext = "F"
-                elif self.note_decode_tone == 7:
-                    self.note_ext = "F#"
-                elif self.note_decode_tone == 8:
-                    self.note_ext = "G"
-                elif self.note_decode_tone == 9:
-                    self.note_ext = "G#"
-                elif self.note_decode_tone == 10:
-                    self.note_ext = "A"
-                elif self.note_decode_tone == 11:
-                    self.note_ext = "A#"
-                elif self.note_decode_tone == 12:
-                    self.note_ext = "H"
-
-                self.ext_shortened = self.ext[40:]
-                self.pos = 0
-                for buchstabe in self.ext_shortened:
-                    if buchstabe == "=":
-                        self.pos += 1
-                        break
-                    else:
-                        self.pos += 1
-
-                self.timing_exp = self.ext_shortened[self.pos:]
-                self.__output = self.note_ext
-                self.__output += self.note_decod_oct
-                self.__output += f":{self.timing_exp}"
-                self.__output_list.append(str(self.__output))
-
-            except:
-                pass
-
-        self.addToClipboard(str(self.__output_list))
-
-
-

backend/temp.csv

@@ -1 +0,0 @@
-/home/janis/Desktop/Victory.mid

gui/loading_screen.kv

@@ -10,13 +10,13 @@ TrackChooseScreen:
             italic: True
             color: (50, 50, 255, 1)
         FloatLayout:
-            Spinner:
+            MDRaisedButton:
-                id: track_spinner
+                size: "200dp", "50dp"
+                pos_hint: {"center_x": 0.5, "center_y": 0.5}
+                on_release: root.show_dropdown(self)
                 size_hint: 0.7, 0.2
                 pos_hint: {"x": 0.15, "y":0.5}
-                background_color: (0, 0, 0, 1)
                 text: "Select a track"
-                values: ["Test"]
         Button:
             text: "confirm"
             background_color: app.theme_cls.primary_color

lib/midi_management.py

@@ -0,0 +1,68 @@
+from mido import MidiFile, tempo2bpm
+import math
+import pyperclip as pc
+
+
+class MidiManagement:
+    def __init__(self):
+        self.note_reference = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B']
+
+    def addToClipboard(self, text):
+        pc.copy(text)
+
+    def analyse_track(self, path, trackname):
+        mid = MidiFile(path, clip=True)
+        tracks = []
+        for i, track in enumerate(mid.tracks):
+            tracks.append('{} (Track {})'.format(track.name, i))
+        if len(tracks) > 1:
+            tracks.pop(0)
+        else:
+            pass
+        extracted_track = tracks.pop(0)
+        tracknumber = 0
+        while extracted_track != trackname:
+            extracted_track = tracks.pop(0)
+            tracknumber += 1
+        output_list = []
+
+        bpm = 0
+        timing = 20000
+
+        # Track messages
+        for msg in mid.tracks[tracknumber]:
+            if msg.type == "note_on":
+                # We only need to handle pauses here
+                t = math.floor(msg.time / timing)
+                if t > 0:
+                    output_list.append('R:' + str(t))
+            elif msg.type == "note_off":
+                # End tracked note at time offset for midi msg (that is relative to start)
+                note = ''
+                try:
+                    note = self.get_note_as_micro_bit_string(msg)
+                except:
+                    pass
+
+                t = math.floor(msg.time / timing)
+                output_list.append(note + ':' + str(t))
+            else:
+                try:
+                    midi_msg = str(msg)
+                    i = midi_msg.index('tempo=') + 6
+                    units = int(midi_msg[i:i + midi_msg[i:].index(',')])
+                    bpm = int(tempo2bpm(units))
+                    timing = int(units / bpm / 16)
+                    # timing = units per 1/16 beat
+                except:
+                    pass
+
+        self.addToClipboard(str(output_list))
+
+    def get_note_as_micro_bit_string(self, midi_msg):
+        note_value = midi_msg.note
+        octave = note_value // 12
+        tone = note_value % 12
+
+        return self.note_reference[tone] + str(octave)
+

midi-micro-bit_sound_converter-installer.sh

@@ -2,18 +2,13 @@
 
 sudo apt-get install git
 
-mkdir test_clone && cd ./midi-micro_bit-converter
+mkdir ./midi-micro_bit-converter && cd ./midi-micro_bit-converter
 
 git clone https://github.com/simplePCBuilding/midi-micro-bit_sound-converter
 
-pip install kivy[base]
+pip install kivy[base] kivymd pyperclip mido
-pip install kivymd
-pip install pyperclip
-pip install mido
 
-sudo apt-get install xclip
+sudo apt-get install xclip xsel
-sudo apt-get install xsel
-sudo apt-get install wl-clipboard
 
 cd ./midi-micro-bit_sound-converter
 python3 midi_converter.py

midi_converter.py

@@ -1,5 +1,8 @@
+from typing import Optional
 from kivy.uix.screenmanager import ScreenManager
 from kivymd.uix.screen import MDScreen
+from kivymd.uix.menu import MDDropdownMenu
+from kivymd.uix.screen import MDScreen
 from kivy.uix.popup import Popup
 from kivy.properties import ObjectProperty
 from kivy.lang import Builder
@@ -7,10 +10,13 @@ from kivy.uix.label import Label
 from kivymd.app import MDApp
 from mido import MidiFile
 import os
-import backend.midi_management
+import lib.midi_management
-import backend.csv_parsers
-import time
 
+global tracks
+tracks = []
+
+global filepath
+filepath = ''
 
 class HomeScreen(MDScreen):
     pass
@@ -19,23 +25,27 @@ class HomeScreen(MDScreen):
 class FileChooserScreen(MDScreen):
     loadfile = ObjectProperty(None)
     def load(self, path, filename):
+        global filepath
         try:
             self.path = os.path.join(path, filename[0])
             try:
-                self.mid = MidiFile(self.path, clip=True)
+                mid = MidiFile(self.path, clip=True)
-                backend.csv_parsers.CsvWrite().write_str("./backend/temp.csv", [self.path])
+                filepath = self.path
-                self.tracks = []
+                global tracks
-                for self.track in self.mid.tracks:
+                tracks = []
-                    self.tracks.append(str(self.track))
+                for i, track in enumerate(mid.tracks):
-                self.tracks.pop(0)
+                    tracks.append('{} (Track {})'.format(track.name, i))
-                if len(self.tracks) > 1:
+                if len(tracks) > 1:
-                    screen_manager.get_screen("Track").ids.track_spinner.values = self.tracks
+                    tracks.pop(0)
                     screen_manager.current = "Track"
                     screen_manager.transition.direction = "up"
                 else:
+                    lib.midi_management.MidiManagement().analyse_track(str(self.path), tracks.pop(0))
+                    screen_manager.get_screen("Home").ids.infobox.text = "The command has been copied to the clipboard"
                     screen_manager.current = "Home"
                     screen_manager.transition.direction = "right"
-            except:
+            except Exception as e:
+                print(e)
                 self.popup_fe = Popup(title="FileError", content=Label(text="Please select a MIDI-File!"),
                             size_hint=(0.4, 0.4), auto_dismiss=True)
                 self.popup_fe.open()
@@ -47,16 +57,40 @@ class FileChooserScreen(MDScreen):
 
 
 class TrackChooseScreen(MDScreen):
-    def extract(self):
+    def show_dropdown(self, button):
-        self.chosen_track = self.ids.track_spinner.text
+        global tracks
-        if self.chosen_track == "Select a track":
+        menu_items = []
-            self.popup_ns = Popup(title="NoSelectionError", content=Label(text="Please select a Track!"),
+        for track in tracks:
+            menu_items.append(
+                {
+                    "viewclass": "OneLineListItem",
+                    "text": track,
+                    "on_release": lambda t=track, menu=None : self.extract(t, menu)
+                }
+            )
+
+        menu = MDDropdownMenu(
+            caller=button,
+            items=menu_items,
+            width_mult=8,
+        )
+
+        # Pass the menu to each item in the lambda callback to dismiss the menu
+        for item in menu_items:
+            item["on_release"] = lambda track=item["text"], menu=menu: self.extract(track, menu)
+
+        menu.open()
+
+    def extract(self, item: str, menu: Optional[MDDropdownMenu] = None):
+        global filepath
+        if menu != None:
+            menu.dismiss()
+        if item == "Select a track":
+            popup_ns = Popup(title="NoSelectionError", content=Label(text="Please select a Track!"),
                                   size_hint=(0.4, 0.4), auto_dismiss=True)
-            self.popup_ns.open()
+            popup_ns.open()
         else:
-            self.path = backend.csv_parsers.CsvRead().importing("./backend/temp.csv").pop(0)
+            lib.midi_management.MidiManagement().analyse_track(str(filepath), item)
-            self.path_transmit = self.path.pop(0)
-            backend.midi_management.MidiManagement().analyse_track(str(self.path_transmit), self.chosen_track)
             screen_manager.get_screen("Home").ids.infobox.text = "The command has been copied to the clipboard"
             screen_manager.current = "Home"
             screen_manager.transition.direction = "right"