9 files changed, 578 insertions, 0 deletions
diff --git a/solo-tool-project/src/solo_tool/__init__.py b/solo-tool-project/src/solo_tool/__init__.py
new file mode 100644
index 0000000..e1e7777
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/__init__.py
@@ -0,0 +1 @@
+from .solo_tool import SoloTool
diff --git a/solo-tool-project/src/solo_tool/abcontroller.py b/solo-tool-project/src/solo_tool/abcontroller.py
new file mode 100644
index 0000000..cec9fb2
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/abcontroller.py
@@ -0,0 +1,82 @@
+from collections import namedtuple
+
+_AB = namedtuple("_AB", ["a", "b"])
+
+class ABController:
+    def __init__(self, enabled=True, callback=None):
+        self._setPositionCallback = callback
+        self._limits = {} # dictionary of all songs
+        self._songLimits = None # list of limits for selected song
+        self._currentLimits = _AB(0.0, 0.0) # a/b positions of active limit
+        self._loadedIndex = None
+        self._enabled = enabled
+
+    def _ensureSongExists(self, path):
+        if path not in self._limits:
+            self._limits[path] = []
+
+    def setCurrentSong(self, path):
+        self._ensureSongExists(path)
+        self._songLimits = self._limits[path]
+        self._loadedIndex = None
+
+    def storeLimits(self, aLimit, bLimit, song=None):
+        if song is not None:
+            self._ensureSongExists(song)
+            songLimits = self._limits[song]
+        else:
+            songLimits = self._songLimits
+
+        if songLimits is None:
+            return
+
+        ab = _AB(aLimit, bLimit)
+        songLimits.append(ab)
+
+    def loadLimits(self, index):
+        if not self._songLimits:
+            return
+
+        if index >= 0 and index < len(self._songLimits):
+            self._currentLimits = self._songLimits[index]
+            self._loadedIndex = index
+
+    def nextStoredAbLimits(self):
+        if self._loadedIndex is None:
+            nextIndex = 0
+        else:
+            nextIndex = self._loadedIndex + 1
+        self.loadLimits(nextIndex)
+
+    def previousStoredAbLimits(self):
+        if self._loadedIndex is None:
+            previousIndex = 0
+        else:
+            previousIndex = self._loadedIndex - 1
+        self.loadLimits(previousIndex)
+
+    def setLimits(self, aLimit, bLimit):
+        self._currentLimits = _AB(aLimit, bLimit)
+        self._loadedIndex = None
+
+    def positionChanged(self, position):
+        if position > self._currentLimits.b and self._setPositionCallback and self._enabled:
+            self._setPositionCallback(self._currentLimits.a)
+
+    def setEnable(self, enable):
+        self._enabled = enable
+
+    def isEnabled(self):
+        return self._enabled
+
+    def getStoredLimits(self, song):
+        return self._limits.get(song)
+
+    def getCurrentLimits(self):
+        return self._currentLimits
+
+    def getLoadedIndex(self):
+        return self._loadedIndex
+
+    def clear(self):
+        self.__init__(enabled=self._enabled, callback=self._setPositionCallback)
diff --git a/solo-tool-project/src/solo_tool/midi_controller_launchpad_mini.py b/solo-tool-project/src/solo_tool/midi_controller_launchpad_mini.py
new file mode 100644
index 0000000..961127c
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/midi_controller_launchpad_mini.py
@@ -0,0 +1,145 @@
+from .midi_wrapper_mido import MidiWrapper
+
+class MidiController:
+    DEVICE_NAME = "Launchpad Mini MIDI 1"
+    LIGHT_CONTROL_CHANNEL = 0
+    LED_GREEN  = 124
+    LED_YELLOW = 126
+    LED_RED    = 3
+    LED_OFF    = 0
+    BUTTON_MATRIX = [[x for x in range(y * 16, y * 16 + 8)] for y in range(0,8)] # address as [row][col]
+
+    MIN_PLAYBACK_RATE = 0.5
+    MAX_PLAYBACK_RATE = 1.2
+    PLAYBACK_RATE_STEP = 0.1
+
+    MIN_PLAYBACK_VOLUME = 0.5
+    MAX_PLAYBACK_VOLUME = 1.2
+    PLAYBACK_VOLUME_STEP = 0.1
+
+    def __init__(self, soloTool, midiWrapperOverride=None):
+        self._soloTool = soloTool
+        if midiWrapperOverride is not None:
+            self._midiWrapper = midiWrapperOverride
+        else:
+            self._midiWrapper = MidiWrapper()
+
+        self._registerHandlers()
+        self._soloTool.registerPlayingStateCallback(self._updatePlayPauseButton)
+        self._soloTool.registerPlaybackVolumeCallback(self._updateVolumeRow)
+        self._soloTool.registerPlaybackRateCallback(self._updateRateRow)
+        self._soloTool.registerAbLimitEnabledCallback(self._updateToggleAbLimitEnableButton)
+
+    def _registerHandlers(self):
+        self._handlers = {
+            96  : self._soloTool.stop,
+            99  : self._soloTool.jumpToA,
+            112 : self._playPause,
+            101 : self._toggleAbLimitEnable,
+            102 : self._soloTool.previousStoredAbLimits,
+            103 : self._soloTool.nextStoredAbLimits,
+            118 : self._soloTool.previousSong,
+            119 : self._soloTool.nextSong
+        }
+        
+        for i in range(0, 8):
+            volume = round(MidiController.MIN_PLAYBACK_VOLUME + MidiController.PLAYBACK_VOLUME_STEP * i, 1)
+            self._handlers[i] = self._createSetPlaybackVolumeCallback(volume)
+
+        for i, button in enumerate(range(16, 24)):
+            rate = round(MidiController.MIN_PLAYBACK_RATE + MidiController.PLAYBACK_RATE_STEP * i, 1)
+            self._handlers[button] = self._createSetPlaybackRateCallback(rate)
+
+    def connect(self):
+        self._midiWrapper.setCallback(self._callback)
+        self._midiWrapper.connect(MidiController.DEVICE_NAME)
+        self._initialiseButtonLEDs()
+
+    def _callback(self, msg):
+        if msg.type != "note_on" or msg.velocity < 127:
+            return
+
+        if msg.note in self._handlers:
+            handler = self._handlers[msg.note]()
+
+    def _playPause(self):
+        if self._soloTool.isPlaying():
+            self._soloTool.pause()
+        else:
+            self._soloTool.play()
+    
+    def _toggleAbLimitEnable(self):
+        self._soloTool.setAbLimitEnable(not self._soloTool.isAbLimitEnabled())
+
+    def _updatePlayPauseButton(self, playing):
+        if playing:
+            self._setButtonLED(7, 0, MidiController.LED_GREEN)
+        else:
+            self._setButtonLED(7, 0, MidiController.LED_YELLOW)
+
+    def _updateToggleAbLimitEnableButton(self, enabled):
+        if enabled:
+            self._setButtonLED(6, 5, MidiController.LED_GREEN)
+        else:
+            self._setButtonLED(6, 5, MidiController.LED_RED)
+
+    def _updateVolumeRow(self, volume):
+        t1 = int(round(volume / MidiController.PLAYBACK_VOLUME_STEP, 1))
+        t2 = int(round(MidiController.MIN_PLAYBACK_VOLUME / MidiController.PLAYBACK_VOLUME_STEP, 1))
+        lastColumnLit = t1 - t2 + 1
+        self._lightRowUntilColumn(0, lastColumnLit, MidiController.LED_GREEN)
+
+    def _updateRateRow(self, rate):
+        t1 = int(round(rate / MidiController.PLAYBACK_RATE_STEP, 1))
+        t2 = int(round(MidiController.MIN_PLAYBACK_RATE / MidiController.PLAYBACK_RATE_STEP, 1))
+        lastColumnLit = t1 - t2 + 1
+        self._lightRowUntilColumn(1, lastColumnLit, MidiController.LED_YELLOW)
+
+    def _createSetPlaybackRateCallback(self, rate):
+        def f():
+            self._soloTool.setPlaybackRate(rate)
+        return f
+
+    def _createSetPlaybackVolumeCallback(self, volume):
+        def f():
+            self._soloTool.setPlaybackVolume(volume)
+        return f
+
+    def _setButtonLED(self, row, col, colour):
+        self._midiWrapper.sendMessage(MidiController.BUTTON_MATRIX[row][col], colour, MidiController.LIGHT_CONTROL_CHANNEL)
+
+    def _lightRowUntilColumn(self, row, column, litColour):
+        colours = [litColour] * column + [MidiController.LED_OFF] * (8 - column)
+        for col in range(0, 8):
+            self._setButtonLED(row, col, colours[col])
+
+    def _allLEDsOff(self):
+        for row in range(0, 8):
+            for col in range(0, 8):
+                self._setButtonLED(row, col, MidiController.LED_OFF)
+
+    def _initialiseButtonLEDs(self):
+        self._allLEDsOff()
+
+        # volume buttons
+        self._updateVolumeRow(self._soloTool.getPlaybackVolume())
+
+        # playback rate buttons
+        self._updateRateRow(self._soloTool.getPlaybackRate())
+
+        # playback control
+        self._setButtonLED(6, 0, MidiController.LED_RED)
+        self._updatePlayPauseButton(self._soloTool.isPlaying())
+
+        # AB repeat toggle
+        self._updateToggleAbLimitEnableButton(self._soloTool.isAbLimitEnabled())
+
+        # AB control
+        self._setButtonLED(6, 3, MidiController.LED_YELLOW)
+        self._setButtonLED(6, 6, MidiController.LED_RED)
+        self._setButtonLED(6, 7, MidiController.LED_GREEN)
+
+        # Song control
+        self._setButtonLED(7, 6, MidiController.LED_RED)
+        self._setButtonLED(7, 7, MidiController.LED_GREEN)
+
diff --git a/solo-tool-project/src/solo_tool/midi_wrapper_mido.py b/solo-tool-project/src/solo_tool/midi_wrapper_mido.py
new file mode 100644
index 0000000..bf3aa85
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/midi_wrapper_mido.py
@@ -0,0 +1,21 @@
+import mido
+
+class MidiWrapper:
+    def __init__(self):
+        self._inPort = None
+        self._outPort = None
+        self._callback = None
+
+    def setCallback(self, callback):
+        self._callback = callback
+
+    def connect(self, deviceName):
+        self._inPort = mido.open_input(deviceName)
+        self._inPort.callback = self._callback
+        self._outPort = mido.open_output(deviceName)
+
+    def sendMessage(self, note, velocity, channel):
+        if self._outPort is not None:
+            msg = mido.Message('note_on', channel=channel, velocity=velocity, note=note)
+            self._outPort.send(msg)
+
diff --git a/solo-tool-project/src/solo_tool/notifier.py b/solo-tool-project/src/solo_tool/notifier.py
new file mode 100644
index 0000000..9f445b6
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/notifier.py
@@ -0,0 +1,29 @@
+class Notifier:
+    PLAYING_STATE_EVENT = 0
+    PLAYBACK_VOLUME_EVENT = 1
+    PLAYBACK_RATE_EVENT = 2
+    CURRENT_SONG_EVENT = 3
+    CURRENT_AB_EVENT = 4
+    AB_LIMIT_ENABLED_EVENT = 5
+
+    def __init__(self, player):
+        self._callbacks = dict()
+        self._player = player
+        self._player.setPlayingStateChangedCallback(self._playingStateChangedCallback)
+        self._player.setPlaybackVolumeChangedCallback(self._playbackVolumeChangedCallback)
+
+    def registerCallback(self, event, callback):
+        if event not in self._callbacks:
+            self._callbacks[event] = list()
+        self._callbacks[event].append(callback)
+
+    def notify(self, event, value):
+        for callback in self._callbacks.get(event, list()):
+            callback(value)
+
+    def _playingStateChangedCallback(self, *args):
+        self.notify(Notifier.PLAYING_STATE_EVENT, self._player.isPlaying())
+
+    def _playbackVolumeChangedCallback(self, *args):
+        self.notify(Notifier.PLAYBACK_VOLUME_EVENT, self._player.getPlaybackVolume())
+
diff --git a/solo-tool-project/src/solo_tool/player_vlc.py b/solo-tool-project/src/solo_tool/player_vlc.py
new file mode 100644
index 0000000..283102e
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/player_vlc.py
@@ -0,0 +1,55 @@
+import vlc
+
+class Player:
+    def __init__(self):
+        self._player = vlc.MediaPlayer()
+
+    def play(self):
+        self._player.play()
+
+    def stop(self):
+        self._player.stop()
+
+    def pause(self):
+        self._player.pause()
+
+    def isPlaying(self):
+        playing = self._player.is_playing() == 1
+        return playing
+
+    def setPlaybackRate(self, rate):
+        self._player.set_rate(rate)
+
+    def getPlaybackRate(self):
+        return self._player.get_rate()
+
+    def setPlaybackPosition(self, position):
+        self._player.set_position(position)
+
+    def getPlaybackPosition(self):
+        return self._player.get_position()
+
+    def setPlaybackVolume(self, volume):
+        self._player.audio_set_volume(int(volume * 100))
+
+    def getPlaybackVolume(self):
+        return self._player.audio_get_volume() / 100.0
+
+    def setCurrentSong(self, path):
+        self._player.stop()
+        media = vlc.Media(path)
+        self._player.set_media(media)
+
+    def setPlayingStateChangedCallback(self, callback):
+        events = [
+            vlc.EventType.MediaPlayerStopped,
+            vlc.EventType.MediaPlayerPlaying,
+            vlc.EventType.MediaPlayerPaused
+        ]
+        manager = self._player.event_manager()
+        for e in events:
+            manager.event_attach(e, callback)
+
+    def setPlaybackVolumeChangedCallback(self, callback):
+        manager = self._player.event_manager()
+        manager.event_attach(vlc.EventType.MediaPlayerAudioVolume, callback)
diff --git a/solo-tool-project/src/solo_tool/playlist.py b/solo-tool-project/src/solo_tool/playlist.py
new file mode 100644
index 0000000..bbfd8f5
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/playlist.py
@@ -0,0 +1,40 @@
+class Playlist:
+    def __init__(self, callback):
+        self._songList = list()
+        self._currentSong = None
+        self._setSongCallback = callback
+
+    def addSong(self, path):
+        self._songList.append(path)
+
+    def setCurrentSong(self, index):
+        if index >= 0 and index < len(self._songList):
+            self._currentSong = index
+            self._setSongCallback(self._songList[index])
+    
+    def getCurrentSong(self):
+        index = self._currentSong
+        return self._songList[index] if index is not None else None
+
+    def getCurrentSongIndex(self):
+        return self._currentSong
+
+    def getSongs(self):
+        return self._songList
+
+    def clear(self):
+        self.__init__(self._setSongCallback)
+
+    def nextSong(self):
+        if self._currentSong is None:
+            nextSong = 0
+        else:
+            nextSong = self._currentSong + 1
+        self.setCurrentSong(nextSong)
+
+    def previousSong(self):
+        if self._currentSong is None:
+            prevSong = 0
+        else:
+            prevSong = self._currentSong - 1
+        self.setCurrentSong(prevSong)
diff --git a/solo-tool-project/src/solo_tool/session_manager.py b/solo-tool-project/src/solo_tool/session_manager.py
new file mode 100644
index 0000000..718e864
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/session_manager.py
@@ -0,0 +1,41 @@
+import json
+
+class SessionManager:
+    def __init__(self, playlist, abController):
+        self._playlist = playlist
+        self._abController = abController
+
+    def addSong(self, path):
+        self._playlist.addSong(path)
+
+    def storeLimits(self, aLimit, bLimit):
+        self._abController.storeLimits(aLimit, bLimit)
+
+    def loadSession(self, file):
+        jsonStr = file.read()
+        session = json.loads(jsonStr)
+
+        self._playlist.clear()
+        self._abController.clear()
+
+        for entry in session:
+            songPath = entry["path"]
+            abLimits = entry["ab_limits"]
+            self._playlist.addSong(songPath)
+
+            if abLimits is not None:
+                for l in abLimits:
+                    self._abController.storeLimits(l[0], l[1], songPath)
+            
+    def saveSession(self, file):
+        songs = self._playlist.getSongs()
+        session = list()
+
+        for s in songs:
+            entry = {
+                "path": s,
+                "ab_limits" : self._abController.getStoredLimits(s)
+            }
+            session.append(entry)
+
+        file.write(json.dumps(session))
diff --git a/solo-tool-project/src/solo_tool/solo_tool.py b/solo-tool-project/src/solo_tool/solo_tool.py
new file mode 100644
index 0000000..211babf
--- /dev/null
+++ b/solo-tool-project/src/solo_tool/solo_tool.py
@@ -0,0 +1,164 @@
+import os
+
+from .playlist import Playlist
+from .abcontroller import ABController
+from .session_manager import SessionManager
+from .notifier import Notifier
+from .player_vlc import Player
+
+class SoloTool:
+    def __init__(self, playerOverride=None):
+        self._player = Player() if playerOverride is None else playerOverride
+        self._playlist = Playlist(self._playlistCallback)
+        self._abController = ABController(enabled=False, callback=self._abControllerCallback)
+        self._sessionManager = SessionManager(self._playlist, self._abController)
+        self._notifier = Notifier(self._player)
+
+    def _playlistCallback(self, path):
+        self._player.setCurrentSong(path)
+        self._abController.setCurrentSong(path)
+
+    def _abControllerCallback(self, position):
+        self._player.setPlaybackPosition(position)
+
+    def tick(self):
+        position = self._player.getPlaybackPosition()
+        self._abController.positionChanged(position)
+
+    def addSong(self, path):
+        if os.path.isfile(path):
+            self._sessionManager.addSong(path)
+
+    def setSong(self, index):
+        previous = self._playlist.getCurrentSongIndex()
+        self._playlist.setCurrentSong(index)
+        new = self._playlist.getCurrentSongIndex()
+        if previous != new:
+            self._notifier.notify(Notifier.CURRENT_SONG_EVENT, new)
+
+    def nextSong(self):
+        previous = self._playlist.getCurrentSongIndex()
+        self._playlist.nextSong()
+        new = self._playlist.getCurrentSongIndex()
+        if previous != new:
+            self._notifier.notify(Notifier.CURRENT_SONG_EVENT, new)
+
+    def previousSong(self):
+        previous = self._playlist.getCurrentSongIndex()
+        self._playlist.previousSong()
+        new = self._playlist.getCurrentSongIndex()
+        if previous != new:
+            self._notifier.notify(Notifier.CURRENT_SONG_EVENT, new)
+
+    def getSongs(self):
+        return self._playlist.getSongs()
+
+    def storeAbLimits(self, aLimit, bLimit):
+        self._abController.storeLimits(aLimit, bLimit)
+
+    def loadAbLimits(self, index):
+        previous = self._abController.getLoadedIndex()
+        self._abController.loadLimits(index)
+        new = self._abController.getLoadedIndex()
+        if previous != new:
+            self._notifier.notify(Notifier.CURRENT_AB_EVENT, new)
+    
+    def setAbLimits(self, aLimit, bLimit):
+        self._abController.setLimits(aLimit, bLimit)
+
+    def getStoredAbLimits(self):
+        currentSong = self._playlist.getCurrentSong()
+        if currentSong is not None:
+            return self._abController.getStoredLimits(currentSong)
+        else:
+            return list()
+
+    def setAbLimitEnable(self, enable):
+        previous = self._abController.isEnabled()
+        self._abController.setEnable(enable)
+        new = self._abController.isEnabled()
+        if previous != new:
+            self._notifier.notify(Notifier.AB_LIMIT_ENABLED_EVENT, new)
+
+    def isAbLimitEnabled(self):
+        return self._abController.isEnabled()
+
+    def nextStoredAbLimits(self):
+        previous = self._abController.getLoadedIndex()
+        self._abController.nextStoredAbLimits()
+        new = self._abController.getLoadedIndex()
+        if previous != new:
+            self._notifier.notify(Notifier.CURRENT_AB_EVENT, new)
+
+    def previousStoredAbLimits(self):
+        previous = self._abController.getLoadedIndex()
+        self._abController.previousStoredAbLimits()
+        new = self._abController.getLoadedIndex()
+        if previous != new:
+            self._notifier.notify(Notifier.CURRENT_AB_EVENT, new)
+
+    def jumpToA(self):
+        a = self._abController.getCurrentLimits()[0]
+        # XXX assumes that player.setPlaybackPosition is thread-safe!
+        self._player.setPlaybackPosition(a)
+
+    def loadSession(self, path):
+        with open(path, "r") as f:
+            self._sessionManager.loadSession(f)
+
+    def saveSession(self, path):
+        with open(path, "w") as f:
+            self._sessionManager.saveSession(f)
+
+    def play(self):
+        self._player.play()
+
+    def pause(self):
+        self._player.pause()
+
+    def stop(self):
+        self._player.stop()
+
+    def isPlaying(self):
+        return self._player.isPlaying()
+
+    def setPlaybackRate(self, rate):
+        previous = self._player.getPlaybackRate()
+        self._player.setPlaybackRate(rate)
+        new = self._player.getPlaybackRate()
+        if previous != new:
+            self._notifier.notify(Notifier.PLAYBACK_RATE_EVENT, new)
+
+    def getPlaybackRate(self):
+        return self._player.getPlaybackRate()
+
+    def setPlaybackPosition(self, position):
+        self._player.setPlaybackPosition(position)
+
+    def getPlaybackPosition(self):
+        return self._player.getPlaybackPosition()
+
+    def setPlaybackVolume(self, volume):
+        self._player.setPlaybackVolume(volume)
+
+    def getPlaybackVolume(self):
+        return self._player.getPlaybackVolume()
+
+    def registerPlayingStateCallback(self, callback):
+        self._notifier.registerCallback(Notifier.PLAYING_STATE_EVENT, callback)
+
+    def registerPlaybackVolumeCallback(self, callback):
+        self._notifier.registerCallback(Notifier.PLAYBACK_VOLUME_EVENT, callback)
+
+    def registerPlaybackRateCallback(self, callback):
+        self._notifier.registerCallback(Notifier.PLAYBACK_RATE_EVENT, callback)
+
+    def registerCurrentSongCallback(self, callback):
+        self._notifier.registerCallback(Notifier.CURRENT_SONG_EVENT, callback)
+
+    def registerCurrentAbLimitsCallback(self, callback):
+        self._notifier.registerCallback(Notifier.CURRENT_AB_EVENT, callback)
+
+    def registerAbLimitEnabledCallback(self, callback):
+        self._notifier.registerCallback(Notifier.AB_LIMIT_ENABLED_EVENT, callback)
+