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Commit | Line | Data |
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be27763f IB |
1 | import threading |
2 | import pydub | |
98ff4305 | 3 | import time |
60979de4 | 4 | from transitions.extensions import HierarchicalMachine as Machine |
be27763f | 5 | |
29597680 IB |
6 | import pyaudio as pa |
7 | import sounddevice as sd | |
8 | import os.path | |
9 | ||
10 | from .lock import Lock | |
1b4b78f5 IB |
11 | from . import gain |
12 | ||
29597680 IB |
13 | file_lock = Lock("file") |
14 | ||
15 | pyaudio = pa.PyAudio() | |
16 | ||
60979de4 | 17 | class MusicFile(Machine): |
1b4b78f5 | 18 | def __init__(self, filename, mapping, name = None, gain = 1): |
60979de4 IB |
19 | states = [ |
20 | 'initial', | |
21 | 'loading', | |
22 | 'failed', | |
29597680 | 23 | { 'name': 'loaded', 'children': ['stopped', 'playing', 'paused', 'stopping'] } |
60979de4 IB |
24 | ] |
25 | transitions = [ | |
26 | { 'trigger': 'load', 'source': 'initial', 'dest': 'loading'}, | |
27 | { 'trigger': 'fail', 'source': 'loading', 'dest': 'failed'}, | |
28 | { 'trigger': 'success', 'source': 'loading', 'dest': 'loaded_stopped'}, | |
29597680 IB |
29 | { 'trigger': 'start_playing', 'source': 'loaded_stopped', 'dest': 'loaded_playing'}, |
30 | { 'trigger': 'pause', 'source': 'loaded_playing', 'dest': 'loaded_paused'}, | |
31 | { 'trigger': 'unpause', 'source': 'loaded_paused', 'dest': 'loaded_playing'}, | |
32 | { 'trigger': 'stop_playing', 'source': ['loaded_playing','loaded_paused'], 'dest': 'loaded_stopping'}, | |
33 | { 'trigger': 'stopped', 'source': 'loaded_stopping', 'dest': 'loaded_stopped'} | |
60979de4 IB |
34 | ] |
35 | ||
36 | Machine.__init__(self, states=states, transitions=transitions, initial='initial') | |
37 | ||
1b4b78f5 IB |
38 | self.volume = 100 |
39 | self.mapping = mapping | |
be27763f | 40 | self.filename = filename |
29597680 | 41 | self.stream = None |
9de92b6d | 42 | self.name = name or filename |
29597680 | 43 | self.audio_segment = None |
1b4b78f5 | 44 | self.volume_factor = gain |
29597680 | 45 | self.music_lock = Lock("music__" + filename) |
0deb82a5 | 46 | self.wait_event = threading.Event() |
be27763f | 47 | |
29597680 IB |
48 | threading.Thread(name = "MSMusicLoad", target = self.load).start() |
49 | ||
50 | def on_enter_loading(self): | |
51 | with file_lock: | |
52 | try: | |
53 | print("Loading « {} »".format(self.name)) | |
1b4b78f5 IB |
54 | db_gain = gain(self.volume_factor * 100) |
55 | self.audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(44100).apply_gain(db_gain) | |
29597680 IB |
56 | self.sound_duration = self.audio_segment.duration_seconds |
57 | except Exception as e: | |
58 | print("failed to load « {} »: {}".format(self.name, e)) | |
59 | self.loading_error = e | |
60 | self.fail() | |
61 | else: | |
62 | self.success() | |
63 | print("Loaded « {} »".format(self.name)) | |
60979de4 IB |
64 | |
65 | def check_is_loaded(self): | |
66 | return self.state.startswith('loaded_') | |
be27763f | 67 | |
29597680 IB |
68 | def is_not_stopped(self): |
69 | return self.check_is_loaded() and not self.is_loaded_stopped() | |
0e5d59f7 | 70 | |
9de92b6d | 71 | def is_paused(self): |
29597680 | 72 | return self.is_loaded_paused() |
9de92b6d | 73 | |
98ff4305 IB |
74 | @property |
75 | def sound_position(self): | |
29597680 IB |
76 | if self.is_not_stopped(): |
77 | return self.current_frame / self.current_audio_segment.frame_rate | |
98ff4305 IB |
78 | else: |
79 | return 0 | |
80 | ||
0e5d59f7 | 81 | def play(self, fade_in = 0, volume = 100, start_at = 0): |
1b4b78f5 IB |
82 | db_gain = gain(volume) + self.mapping.master_gain |
83 | self.volume = volume | |
84 | ||
29597680 IB |
85 | ms = int(start_at * 1000) |
86 | ms_fi = max(1, int(fade_in * 1000)) | |
87 | with self.music_lock: | |
1b4b78f5 | 88 | self.current_audio_segment = (self.audio_segment + db_gain).fade(from_gain=-120, duration=ms_fi, start=ms) |
29597680 IB |
89 | self.before_loaded_playing(initial_frame = int(start_at * self.audio_segment.frame_rate)) |
90 | self.start_playing() | |
91 | ||
92 | def before_loaded_playing(self, initial_frame = 0): | |
93 | self.current_frame = initial_frame | |
94 | with self.music_lock: | |
95 | segment = self.current_audio_segment | |
96 | ||
97 | self.stream = sd.RawOutputStream(samplerate=segment.frame_rate, | |
98 | channels=segment.channels, | |
99 | dtype='int' + str(8*segment.sample_width), # FIXME: ? | |
100 | latency=1., | |
101 | callback=self.play_callback, | |
102 | finished_callback=self.finished_callback | |
103 | ) | |
104 | ||
105 | def on_enter_loaded_playing(self): | |
106 | self.stream.start() | |
107 | ||
108 | def on_enter_loaded_paused(self): | |
109 | self.stream.stop() | |
110 | ||
111 | def finished_callback(self): | |
112 | if self.is_loaded_playing(): | |
113 | self.stop_playing() | |
114 | if self.is_loaded_stopping(): | |
115 | self.stopped() | |
116 | ||
0deb82a5 IB |
117 | def on_enter_loaded_stopped(self): |
118 | self.wait_event.set() | |
119 | ||
29597680 IB |
120 | def play_callback(self, out_data, frame_count, time_info, status_flags): |
121 | with self.music_lock: | |
122 | audio_segment = self.current_audio_segment.get_sample_slice_data( | |
123 | start_sample=self.current_frame, | |
124 | end_sample=self.current_frame + frame_count | |
125 | ) | |
126 | self.current_frame += frame_count | |
127 | if len(audio_segment) == 0: | |
128 | raise sd.CallbackStop | |
129 | ||
130 | out_data[:] = audio_segment.ljust(len(out_data), b'\0') | |
be27763f | 131 | |
1b4b78f5 | 132 | def stop(self, fade_out = 0, wait = False): |
29597680 IB |
133 | if self.is_loaded_playing(): |
134 | ms = int(self.sound_position * 1000) | |
135 | ms_fo = max(1, int(fade_out * 1000)) | |
136 | ||
137 | with self.music_lock: | |
138 | self.current_audio_segment = self.current_audio_segment[:ms + ms_fo].fade_out(ms_fo) | |
139 | self.stop_playing() | |
1b4b78f5 IB |
140 | if wait: |
141 | self.wait_end() | |
0e5d59f7 | 142 | else: |
29597680 IB |
143 | self.stop_playing() |
144 | self.stopped() | |
0e5d59f7 | 145 | |
1b4b78f5 IB |
146 | def set_gain(self, db_gain): |
147 | if not self.is_not_stopped(): | |
29597680 IB |
148 | return |
149 | ||
1b4b78f5 IB |
150 | new_audio_segment = self.current_audio_segment + db_gain |
151 | ||
29597680 IB |
152 | with self.music_lock: |
153 | self.current_audio_segment = new_audio_segment | |
154 | ||
1b4b78f5 IB |
155 | def set_volume(self, value, add = False): |
156 | [db_gain, self.volume] = gain(value + int(add) * self.volume, self.volume) | |
157 | ||
158 | self.set_gain(db_gain) | |
be27763f | 159 | |
b86db9f1 | 160 | def wait_end(self): |
0deb82a5 IB |
161 | self.wait_event.clear() |
162 | self.wait_event.wait() | |
d479af33 | 163 | |
29597680 IB |
164 | # Add some more functions to AudioSegments |
165 | def get_sample_slice_data(self, start_sample=0, end_sample=float('inf')): | |
166 | max_val = int(self.frame_count()) | |
167 | ||
168 | start_i = max(start_sample, 0) * self.frame_width | |
169 | end_i = min(end_sample, max_val) * self.frame_width | |
170 | ||
171 | return self._data[start_i:end_i] | |
172 | ||
173 | pydub.AudioSegment.get_sample_slice_data = get_sample_slice_data |