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Commit | Line | Data |
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be27763f IB |
1 | import threading |
2 | import pydub | |
87f211fb | 3 | import math |
98ff4305 | 4 | import time |
60979de4 | 5 | from transitions.extensions import HierarchicalMachine as Machine |
be27763f | 6 | |
29597680 IB |
7 | import pyaudio as pa |
8 | import sounddevice as sd | |
9 | import os.path | |
10 | ||
11 | from .lock import Lock | |
12 | file_lock = Lock("file") | |
13 | ||
14 | pyaudio = pa.PyAudio() | |
15 | ||
60979de4 | 16 | class MusicFile(Machine): |
29597680 | 17 | def __init__(self, filename, name = None, gain = 1): |
60979de4 IB |
18 | states = [ |
19 | 'initial', | |
20 | 'loading', | |
21 | 'failed', | |
29597680 | 22 | { 'name': 'loaded', 'children': ['stopped', 'playing', 'paused', 'stopping'] } |
60979de4 IB |
23 | ] |
24 | transitions = [ | |
25 | { 'trigger': 'load', 'source': 'initial', 'dest': 'loading'}, | |
26 | { 'trigger': 'fail', 'source': 'loading', 'dest': 'failed'}, | |
27 | { 'trigger': 'success', 'source': 'loading', 'dest': 'loaded_stopped'}, | |
29597680 IB |
28 | { 'trigger': 'start_playing', 'source': 'loaded_stopped', 'dest': 'loaded_playing'}, |
29 | { 'trigger': 'pause', 'source': 'loaded_playing', 'dest': 'loaded_paused'}, | |
30 | { 'trigger': 'unpause', 'source': 'loaded_paused', 'dest': 'loaded_playing'}, | |
31 | { 'trigger': 'stop_playing', 'source': ['loaded_playing','loaded_paused'], 'dest': 'loaded_stopping'}, | |
32 | { 'trigger': 'stopped', 'source': 'loaded_stopping', 'dest': 'loaded_stopped'} | |
60979de4 IB |
33 | ] |
34 | ||
35 | Machine.__init__(self, states=states, transitions=transitions, initial='initial') | |
36 | ||
be27763f | 37 | self.filename = filename |
29597680 | 38 | self.stream = None |
9de92b6d | 39 | self.name = name or filename |
29597680 | 40 | self.audio_segment = None |
87f211fb | 41 | self.gain = gain |
29597680 | 42 | self.music_lock = Lock("music__" + filename) |
0deb82a5 | 43 | self.wait_event = threading.Event() |
be27763f | 44 | |
29597680 IB |
45 | threading.Thread(name = "MSMusicLoad", target = self.load).start() |
46 | ||
47 | def on_enter_loading(self): | |
48 | with file_lock: | |
49 | try: | |
50 | print("Loading « {} »".format(self.name)) | |
51 | volume_factor = 20 * math.log10(self.gain) | |
52 | self.audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(44100).apply_gain(volume_factor) | |
53 | self.sound_duration = self.audio_segment.duration_seconds | |
54 | except Exception as e: | |
55 | print("failed to load « {} »: {}".format(self.name, e)) | |
56 | self.loading_error = e | |
57 | self.fail() | |
58 | else: | |
59 | self.success() | |
60 | print("Loaded « {} »".format(self.name)) | |
60979de4 IB |
61 | |
62 | def check_is_loaded(self): | |
63 | return self.state.startswith('loaded_') | |
be27763f | 64 | |
29597680 IB |
65 | def is_not_stopped(self): |
66 | return self.check_is_loaded() and not self.is_loaded_stopped() | |
0e5d59f7 | 67 | |
9de92b6d | 68 | def is_paused(self): |
29597680 | 69 | return self.is_loaded_paused() |
9de92b6d | 70 | |
98ff4305 IB |
71 | @property |
72 | def sound_position(self): | |
29597680 IB |
73 | if self.is_not_stopped(): |
74 | return self.current_frame / self.current_audio_segment.frame_rate | |
98ff4305 IB |
75 | else: |
76 | return 0 | |
77 | ||
0e5d59f7 | 78 | def play(self, fade_in = 0, volume = 100, start_at = 0): |
29597680 IB |
79 | self.db_gain = self.volume_to_gain(volume) |
80 | ms = int(start_at * 1000) | |
81 | ms_fi = max(1, int(fade_in * 1000)) | |
82 | with self.music_lock: | |
83 | self.current_audio_segment = (self.audio_segment + self.db_gain).fade(from_gain=-120, duration=ms_fi, start=ms) | |
84 | self.before_loaded_playing(initial_frame = int(start_at * self.audio_segment.frame_rate)) | |
85 | self.start_playing() | |
86 | ||
87 | def before_loaded_playing(self, initial_frame = 0): | |
88 | self.current_frame = initial_frame | |
89 | with self.music_lock: | |
90 | segment = self.current_audio_segment | |
91 | ||
92 | self.stream = sd.RawOutputStream(samplerate=segment.frame_rate, | |
93 | channels=segment.channels, | |
94 | dtype='int' + str(8*segment.sample_width), # FIXME: ? | |
95 | latency=1., | |
96 | callback=self.play_callback, | |
97 | finished_callback=self.finished_callback | |
98 | ) | |
99 | ||
100 | def on_enter_loaded_playing(self): | |
101 | self.stream.start() | |
102 | ||
103 | def on_enter_loaded_paused(self): | |
104 | self.stream.stop() | |
105 | ||
106 | def finished_callback(self): | |
107 | if self.is_loaded_playing(): | |
108 | self.stop_playing() | |
109 | if self.is_loaded_stopping(): | |
110 | self.stopped() | |
111 | ||
0deb82a5 IB |
112 | def on_enter_loaded_stopped(self): |
113 | self.wait_event.set() | |
114 | ||
29597680 IB |
115 | def play_callback(self, out_data, frame_count, time_info, status_flags): |
116 | with self.music_lock: | |
117 | audio_segment = self.current_audio_segment.get_sample_slice_data( | |
118 | start_sample=self.current_frame, | |
119 | end_sample=self.current_frame + frame_count | |
120 | ) | |
121 | self.current_frame += frame_count | |
122 | if len(audio_segment) == 0: | |
123 | raise sd.CallbackStop | |
124 | ||
125 | out_data[:] = audio_segment.ljust(len(out_data), b'\0') | |
be27763f | 126 | |
0e5d59f7 | 127 | def stop(self, fade_out = 0): |
29597680 IB |
128 | if self.is_loaded_playing(): |
129 | ms = int(self.sound_position * 1000) | |
130 | ms_fo = max(1, int(fade_out * 1000)) | |
131 | ||
132 | with self.music_lock: | |
133 | self.current_audio_segment = self.current_audio_segment[:ms + ms_fo].fade_out(ms_fo) | |
134 | self.stop_playing() | |
0e5d59f7 | 135 | else: |
29597680 IB |
136 | self.stop_playing() |
137 | self.stopped() | |
0e5d59f7 IB |
138 | |
139 | def set_volume(self, value): | |
29597680 IB |
140 | if self.is_loaded_stopped(): |
141 | return | |
142 | ||
143 | db_gain = self.volume_to_gain(value) | |
144 | new_audio_segment = self.current_audio_segment + (db_gain - self.db_gain) | |
145 | self.db_gain = db_gain | |
146 | with self.music_lock: | |
147 | self.current_audio_segment = new_audio_segment | |
148 | ||
149 | def volume_to_gain(self, volume): | |
150 | return 20 * math.log10(max(volume, 0.0001) / 100) | |
be27763f | 151 | |
b86db9f1 | 152 | def wait_end(self): |
0deb82a5 IB |
153 | self.wait_event.clear() |
154 | self.wait_event.wait() | |
d479af33 | 155 | |
29597680 IB |
156 | # Add some more functions to AudioSegments |
157 | def get_sample_slice_data(self, start_sample=0, end_sample=float('inf')): | |
158 | max_val = int(self.frame_count()) | |
159 | ||
160 | start_i = max(start_sample, 0) * self.frame_width | |
161 | end_i = min(end_sample, max_val) * self.frame_width | |
162 | ||
163 | return self._data[start_i:end_i] | |
164 | ||
165 | pydub.AudioSegment.get_sample_slice_data = get_sample_slice_data |