Add accurate midi timestamps

lib/color_mode.py

@@ -40,7 +40,7 @@ def LoadSettings(self, ledsettings):
         """Called whenever settings change"""
         pass
 
-    def NoteOn(self, midi_event, midi_state, note_position):
+    def NoteOn(self, midi_event, midi_time, midi_state, note_position):
         """Primary high-level function for ColorMode
 
         Called on midi note-on
@@ -74,7 +74,7 @@ def LoadSettings(self, ledsettings):
         self.green = ledsettings.get_color("Green")
         self.blue = ledsettings.get_color("Blue")
 
-    def NoteOn(self, midi_event: mido.Message, midi_state, note_position):
+    def NoteOn(self, midi_event: mido.Message, midi_time, midi_state, note_position):
         return (self.red, self.green, self.blue)
 
 
@@ -85,7 +85,7 @@ def LoadSettings(self, ledsettings):
         self.multicolor_index = 0
         self.multicolor_iteration = ledsettings.multicolor_iteration
 
-    def NoteOn(self, midi_event: mido.Message, midi_state, note_position):
+    def NoteOn(self, midi_event: mido.Message, midi_time, midi_state, note_position):
             chosen_color = self.get_random_multicolor_in_range(midi_event.note)
             return chosen_color
 
@@ -141,7 +141,7 @@ def LoadSettings(self, ledsettings):
         self.timeshift = int(ledsettings.rainbow_timeshift)
         self.timeshift_start = time.time()
 
-    def NoteOn(self, midi_event: mido.Message, midi_state, note_position):
+    def NoteOn(self, midi_event: mido.Message, midi_time, midi_state, note_position):
         shift = (time.time() - self.timeshift_start) * self.timeshift
         return self.calculate_rainbow_colors(note_position, shift)
 
@@ -165,7 +165,7 @@ def LoadSettings(self, ledsettings):
         self.speed_period_in_seconds = ledsettings.speed_period_in_seconds
         self.speed_max_notes = ledsettings.speed_max_notes
 
-    def NoteOn(self, midi_event: mido.Message, midi_state, note_position):
+    def NoteOn(self, midi_event: mido.Message, midi_time, midi_state, note_position):
         current_time = time.time()
         self.notes_in_last_period.append(current_time)
         return self.speed_get_colors()
@@ -204,7 +204,7 @@ def LoadSettings(self, ledsettings):
                              "green": int(ledsettings.usersettings.get_setting_value("gradient_end_green")),
                              "blue": int(ledsettings.usersettings.get_setting_value("gradient_end_blue"))}
 
-    def NoteOn(self, midi_event: mido.Message, midi_state, note_position):
+    def NoteOn(self, midi_event: mido.Message, midi_time, midi_state, note_position):
         return self.gradient_get_colors(note_position)
 
     def gradient_get_colors(self, position):
@@ -224,7 +224,7 @@ def LoadSettings(self, ledsettings):
         self.key_in_scale = ledsettings.key_in_scale
         self.key_not_in_scale = ledsettings.key_not_in_scale
 
-    def NoteOn(self, midi_event: mido.Message, midi_state, note_position):
+    def NoteOn(self, midi_event: mido.Message, midi_time, midi_state, note_position):
         scale_colors = get_scale_color(self.scale_key, midi_event.note, self.key_in_scale, self.key_not_in_scale)
         return scale_colors
 
@@ -235,7 +235,7 @@ def LoadSettings(self, ledsettings):
         self.scale = int(ledsettings.velocityrainbow_scale)
         self.curve = int(ledsettings.velocityrainbow_curve)
 
-    def NoteOn(self, midi_event: mido.Message, midi_state, note_position=None):
+    def NoteOn(self, midi_event: mido.Message, midi_time, midi_state, note_position):
         x = int(((255 * powercurve(midi_event.velocity / 127, self.curve / 100)
                     * (self.scale / 100) % 256) + self.offset) % 256)
         x2 = colorsys.hsv_to_rgb(x / 255, 1, (midi_event.velocity / 127) * 0.3 + 0.7)

lib/functions.py

@@ -59,7 +59,7 @@ def shift(lst, num_shifts):
 
 
 def play_midi(song_path, midiports, saving, menu, ledsettings, ledstrip):
-    midiports.pending_queue.append(mido.Message('note_on'))
+    midiports.midifile_queue.append((mido.Message('note_on'), time.perf_counter()))
 
     if song_path in saving.is_playing_midi.keys():
         menu.render_message(song_path, "Already playing", 2000)
@@ -81,10 +81,10 @@ def play_midi(song_path, midiports, saving, menu, ledsettings, ledstrip):
         for message in mid:
             if song_path in saving.is_playing_midi.keys():
                 if not t0:
-                    t0 = time.time()
+                    t0 = time.perf_counter()
 
                 total_delay += message.time
-                current_time = (time.time() - t0) + message.time
+                current_time = (time.perf_counter() - t0) + message.time
                 drift = total_delay - current_time
 
                 if drift < 0:
@@ -94,19 +94,20 @@ def play_midi(song_path, midiports, saving, menu, ledsettings, ledstrip):
                 if delay < 0:
                     delay = 0
 
+                msg_timestamp = time.perf_counter() + delay
                 if delay > 0:
                     time.sleep(delay)
                 if not message.is_meta:
                     midiports.playport.send(message)
-                    midiports.pending_queue.append(message.copy(time=0))
+                    midiports.midifile_queue.append((message.copy(time=0), msg_timestamp))
 
             else:
-                midiports.pending_queue.clear()
+                midiports.midifile_queue.clear()
                 strip = ledstrip.strip
                 fastColorWipe(strip, True, ledsettings)
                 break
-        print('play time: {:.2f} s (expected {:.2f})'.format(time.time() - t0, total_delay))
-        # print('play time: {:.2f} s (expected {:.2f})'.format(time.time() - t0, length))
+        print('play time: {:.2f} s (expected {:.2f})'.format(time.perf_counter() - t0, total_delay))
+        # print('play time: {:.2f} s (expected {:.2f})'.format(time.perf_counter() - t0, length))
         # saving.is_playing_midi = False
     except FileNotFoundError:
         menu.render_message(song_path, "File not found", 2000)
@@ -201,14 +202,14 @@ def screensaver(menu, midiports, saving, ledstrip, ledsettings):
     while True:
         manage_idle_animation(ledstrip, ledsettings, menu)
 
-        if (time.time() - saving.start_time) > 3600 and delay < 0.5 and menu.screensaver_is_running is False:
+        if (time.perf_counter() - saving.start_time) > 3600 and delay < 0.5 and menu.screensaver_is_running is False:
             delay = 0.9
             interval = 5 / float(delay)
             cpu_history = [None] * int(interval)
             cpu_average = 0
             i = 0
 
-        if int(menu.screen_off_delay) > 0 and ((time.time() - saving.start_time) > (int(menu.screen_off_delay) * 60)):
+        if int(menu.screen_off_delay) > 0 and ((time.perf_counter() - saving.start_time) > (int(menu.screen_off_delay) * 60)):
             menu.screen_status = 0
             GPIO.output(24, 0)
 
@@ -276,7 +277,7 @@ def screensaver(menu, midiports, saving, ledstrip, ledsettings):
         try:
             if str(midiports.inport.poll()) != "None":
                 menu.screensaver_is_running = False
-                saving.start_time = time.time()
+                saving.start_time = time.perf_counter()
                 menu.screen_status = 1
                 GPIO.output(24, 1)
                 midiports.reconnect_ports()
@@ -287,7 +288,7 @@ def screensaver(menu, midiports, saving, ledstrip, ledsettings):
             pass
         if GPIO.input(KEY2) == 0:
             menu.screensaver_is_running = False
-            saving.start_time = time.time()
+            saving.start_time = time.perf_counter()
             menu.screen_status = 1
             GPIO.output(24, 1)
             midiports.reconnect_ports()

lib/learnmidi.py

@@ -350,7 +350,11 @@ def learn_midi(self):
                             wrong_notes = []
                             self.predict_future_notes(absolute_idx, end_idx, notes_to_press)
                             while not set(notes_to_press).issubset(notes_pressed) and self.is_started_midi:
-                                for msg_in in self.midiports.inport.iter_pending():
+                                while self.midiports.midi_queue:
+                                    msg_in, msg_timestamp = self.midiports.midi_queue.popleft()
+                                    if msg_in.type not in ("note_on", "note_off"):
+                                        continue
+
                                     note = int(find_between(str(msg_in), "note=", " "))
 
                                     if "note_off" in str(msg_in):

lib/ledstrip.py

@@ -36,6 +36,8 @@ def __init__(self, usersettings, ledsettings):
                                        self.LED_BRIGHTNESS, self.LED_CHANNEL, ws.WS2811_STRIP_GRB)
         # Intialize the library (must be called once before other functions).
         self.strip.begin()
+        if "releaseGIL" in dir(self.strip):
+            self.strip.releaseGIL()
         self.change_gamma(self.led_gamma)
 
     def change_gamma(self, value):

lib/midiports.py

@@ -1,21 +1,24 @@
 import mido
 from lib import connectall
 import time
+from collections import deque
 
 class MidiPorts:
     def __init__(self, usersettings):
         self.usersettings = usersettings
-        self.pending_queue = []
+        # midi queues will contain a tuple (midi_msg, timestamp)
+        self.midifile_queue = deque()
+        self.midi_queue = deque()
         self.last_activity = 0
         self.inport = None
         self.playport = None
-        self.midipending = []
+        self.midipending = None
 
         # checking if the input port was previously set by the user
         port = self.usersettings.get_setting_value("input_port")
         if port != "default":
             try:
-                self.inport = mido.open_input(port)
+                self.inport = mido.open_input(port, callback=self.msg_callback)
                 print("Inport loaded and set to " + port)
             except:
                 print("Can't load input port: " + port)
@@ -24,7 +27,7 @@ def __init__(self, usersettings):
             try:
                 for port in mido.get_input_names():
                     if "Through" not in port and "RPi" not in port and "RtMidOut" not in port and "USB-USB" not in port:
-                        self.inport = mido.open_input(port)
+                        self.inport = mido.open_input(port, callback=self.msg_callback)
                         self.usersettings.change_setting_value("input_port", port)
                         print("Inport set to " + port)
                         break
@@ -66,7 +69,7 @@ def change_port(self, port, portname):
             destroy_old = None
             if port == "inport":
                 destory_old = self.inport
-                self.inport = mido.open_input(portname)
+                self.inport = mido.open_input(portname, callback=self.msg_callback)
                 self.usersettings.change_setting_value("input_port", portname)
             elif port == "playport":
                 destory_old = self.playport
@@ -84,7 +87,7 @@ def reconnect_ports(self):
         try:
             destroy_old = self.inport
             port = self.usersettings.get_setting_value("input_port")
-            self.inport = mido.open_input(port)
+            self.inport = mido.open_input(port, callback=self.msg_callback)
             if destroy_old is not None:
                 time.sleep(0.002)
                 destroy_old.close()
@@ -99,3 +102,6 @@ def reconnect_ports(self):
                 destroy_old.close()
         except:
             print("Can't reconnect play port: " + port)
+
+    def msg_callback(self, msg):
+        self.midi_queue.append((msg, time.perf_counter()))

lib/savemidi.py

@@ -13,7 +13,7 @@ def __init__(self):
         self.menu = None
         self.is_recording = False
         self.is_playing_midi = {}
-        self.start_time = time.time()
+        self.start_time = time.perf_counter()
 
     def add_instance(self, menu):
         self.menu = menu
@@ -54,12 +54,9 @@ def save(self, filename):
             self.mid = MidiFile(None, None, 0, 20000)  # 20000 is a ticks_per_beat value
             self.track = MidiTrack()
             self.mid.tracks.append(self.track)
-            previous_message_time = None
+            previous_message_time = self.first_note_time
             for message in multicolor_track:
-                if previous_message_time is not None:
-                    time_delay = message[1] - previous_message_time
-                else:
-                    time_delay = 0
+                time_delay = message[1] - previous_message_time
                 previous_message_time = message[1]
 
                 if message[0] == "note":
@@ -78,4 +75,4 @@ def save(self, filename):
         self.menu.render_message("File saved", filename + ".mid", 1500)
 
     def restart_time(self):
-        self.start_time = time.time()
+        self.start_time = time.perf_counter()