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1 | import threading | |
2 | import pydub | |
3 | import time | |
4 | from transitions.extensions import HierarchicalMachine as Machine | |
5 | ||
6 | import os.path | |
7 | ||
8 | import audioop | |
9 | ||
10 | from .lock import Lock | |
11 | from . import Config, gain, debug_print, error_print | |
12 | from .mixer import Mixer | |
13 | ||
14 | file_lock = Lock("file") | |
15 | ||
16 | class MusicFile(Machine): | |
17 | def __init__(self, filename, mapping, name=None, gain=1): | |
18 | states = [ | |
19 | 'initial', | |
20 | 'loading', | |
21 | 'failed', | |
22 | { | |
23 | 'name': 'loaded', | |
24 | 'children': ['stopped', 'playing', 'paused', 'stopping'] | |
25 | } | |
26 | ] | |
27 | transitions = [ | |
28 | { | |
29 | 'trigger': 'load', | |
30 | 'source': 'initial', | |
31 | 'dest': 'loading' | |
32 | }, | |
33 | { | |
34 | 'trigger': 'fail', | |
35 | 'source': 'loading', | |
36 | 'dest': 'failed' | |
37 | }, | |
38 | { | |
39 | 'trigger': 'success', | |
40 | 'source': 'loading', | |
41 | 'dest': 'loaded_stopped' | |
42 | }, | |
43 | { | |
44 | 'trigger': 'start_playing', | |
45 | 'source': 'loaded_stopped', | |
46 | 'dest': 'loaded_playing' | |
47 | }, | |
48 | { | |
49 | 'trigger': 'pause', | |
50 | 'source': 'loaded_playing', | |
51 | 'dest': 'loaded_paused' | |
52 | }, | |
53 | { | |
54 | 'trigger': 'unpause', | |
55 | 'source': 'loaded_paused', | |
56 | 'dest': 'loaded_playing' | |
57 | }, | |
58 | { | |
59 | 'trigger': 'stop_playing', | |
60 | 'source': ['loaded_playing','loaded_paused'], | |
61 | 'dest': 'loaded_stopping' | |
62 | }, | |
63 | { | |
64 | 'trigger': 'stopped', | |
65 | 'source': 'loaded_stopping', | |
66 | 'dest': 'loaded_stopped', | |
67 | 'after': 'trigger_stopped_events' | |
68 | } | |
69 | ] | |
70 | ||
71 | Machine.__init__(self, states=states, | |
72 | transitions=transitions, initial='initial') | |
73 | ||
74 | self.volume = 100 | |
75 | self.mapping = mapping | |
76 | self.filename = filename | |
77 | self.name = name or filename | |
78 | self.audio_segment = None | |
79 | self.audio_segment_frame_width = 0 | |
80 | self.initial_volume_factor = gain | |
81 | self.music_lock = Lock("music__" + filename) | |
82 | self.wait_event = threading.Event() | |
83 | self.db_gain = 0 | |
84 | ||
85 | threading.Thread(name="MSMusicLoad", target=self.load).start() | |
86 | ||
87 | def on_enter_loading(self): | |
88 | with file_lock: | |
89 | try: | |
90 | debug_print("Loading « {} »".format(self.name)) | |
91 | self.mixer = self.mapping.mixer or Mixer() | |
92 | initial_db_gain = gain(self.initial_volume_factor * 100) | |
93 | self.audio_segment = pydub.AudioSegment \ | |
94 | .from_file(self.filename) \ | |
95 | .set_frame_rate(Config.frame_rate) \ | |
96 | .set_channels(Config.channels) \ | |
97 | .set_sample_width(Config.sample_width) \ | |
98 | .apply_gain(initial_db_gain) | |
99 | self.audio_segment_frame_width = self.audio_segment.frame_width | |
100 | self.sound_duration = self.audio_segment.duration_seconds | |
101 | except Exception as e: | |
102 | error_print("failed to load « {} »: {}".format(self.name, e)) | |
103 | self.loading_error = e | |
104 | self.fail() | |
105 | else: | |
106 | self.success() | |
107 | debug_print("Loaded « {} »".format(self.name)) | |
108 | ||
109 | def check_is_loaded(self): | |
110 | return self.state.startswith('loaded_') | |
111 | ||
112 | def is_not_stopped(self): | |
113 | return self.check_is_loaded() and not self.is_loaded_stopped() | |
114 | ||
115 | def is_paused(self): | |
116 | return self.is_loaded_paused() | |
117 | ||
118 | @property | |
119 | def sound_position(self): | |
120 | if self.is_not_stopped(): | |
121 | return self.current_frame / self.current_audio_segment.frame_rate | |
122 | else: | |
123 | return 0 | |
124 | ||
125 | def play(self, fade_in=0, volume=100, loop=0, start_at=0): | |
126 | self.db_gain = gain(volume) + self.mapping.master_gain | |
127 | self.volume = volume | |
128 | self.loop = loop | |
129 | ||
130 | ms = int(start_at * 1000) | |
131 | ms_fi = int(fade_in * 1000) | |
132 | with self.music_lock: | |
133 | self.current_audio_segment = self.audio_segment | |
134 | self.current_frame = int(start_at * self.audio_segment.frame_rate) | |
135 | if ms_fi > 0: | |
136 | # FIXME: apply it to repeated when looping? | |
137 | self.a_s_with_effect = self \ | |
138 | .current_audio_segment[ms : ms+ms_fi] \ | |
139 | .fade_in(ms_fi) | |
140 | self.current_frame_with_effect = 0 | |
141 | else: | |
142 | self.a_s_with_effect = None | |
143 | ||
144 | self.start_playing() | |
145 | ||
146 | def on_enter_loaded_playing(self): | |
147 | self.mixer.add_file(self) | |
148 | ||
149 | def finished_callback(self): | |
150 | if self.is_loaded_playing(): | |
151 | self.stop_playing() | |
152 | if self.is_loaded_stopping(): | |
153 | self.stopped() | |
154 | ||
155 | def trigger_stopped_events(self): | |
156 | self.mixer.remove_file(self) | |
157 | self.wait_event.set() | |
158 | ||
159 | def play_callback(self, out_data_length, frame_count): | |
160 | if self.is_loaded_paused(): | |
161 | return b'\0' * out_data_length | |
162 | ||
163 | with self.music_lock: | |
164 | [data, nb_frames] = self.get_next_sample(frame_count) | |
165 | if nb_frames < frame_count: | |
166 | if self.is_loaded_playing() and self.loop != 0: | |
167 | self.loop -= 1 | |
168 | self.current_frame = 0 | |
169 | [new_data, new_nb_frames] = self.get_next_sample( | |
170 | frame_count - nb_frames) | |
171 | data += new_data | |
172 | nb_frames += new_nb_frames | |
173 | elif nb_frames == 0: | |
174 | # FIXME: too slow | |
175 | threading.Thread( | |
176 | name="MSFinishedCallback", | |
177 | target=self.finished_callback).start() | |
178 | ||
179 | return data.ljust(out_data_length, b'\0') | |
180 | ||
181 | def get_next_sample(self, frame_count): | |
182 | fw = self.audio_segment_frame_width | |
183 | ||
184 | data = b"" | |
185 | nb_frames = 0 | |
186 | if self.a_s_with_effect is not None: | |
187 | segment = self.a_s_with_effect | |
188 | max_val = int(segment.frame_count()) | |
189 | ||
190 | start_i = max(self.current_frame_with_effect, 0) | |
191 | end_i = min(self.current_frame_with_effect + frame_count, max_val) | |
192 | ||
193 | data += segment._data[start_i*fw : end_i*fw] | |
194 | ||
195 | frame_count = max( | |
196 | 0, | |
197 | self.current_frame_with_effect + frame_count - max_val) | |
198 | ||
199 | self.current_frame_with_effect += end_i - start_i | |
200 | self.current_frame += end_i - start_i | |
201 | nb_frames += end_i - start_i | |
202 | ||
203 | if frame_count > 0: | |
204 | self.a_s_with_effect = None | |
205 | ||
206 | segment = self.current_audio_segment | |
207 | max_val = int(segment.frame_count()) | |
208 | ||
209 | start_i = max(self.current_frame, 0) | |
210 | end_i = min(self.current_frame + frame_count, max_val) | |
211 | data += segment._data[start_i*fw : end_i*fw] | |
212 | nb_frames += end_i - start_i | |
213 | self.current_frame += end_i - start_i | |
214 | ||
215 | data = audioop.mul(data, Config.sample_width, self.volume_factor) | |
216 | ||
217 | return [data, nb_frames] | |
218 | ||
219 | def seek(self, value=0, delta=False): | |
220 | # We don't want to do that while stopping | |
221 | if not (self.is_loaded_playing() or self.is_loaded_paused()): | |
222 | return | |
223 | with self.music_lock: | |
224 | self.a_s_with_effect = None | |
225 | self.current_frame = max( | |
226 | 0, | |
227 | int(delta) * self.current_frame | |
228 | + int(value * self.audio_segment.frame_rate)) | |
229 | # FIXME: si on fait un seek + delta, adapter le "loop" | |
230 | ||
231 | def stop(self, fade_out=0, wait=False): | |
232 | if self.is_loaded_playing(): | |
233 | ms = int(self.sound_position * 1000) | |
234 | ms_fo = max(1, int(fade_out * 1000)) | |
235 | ||
236 | new_audio_segment = self.current_audio_segment[: ms+ms_fo] \ | |
237 | .fade_out(ms_fo) | |
238 | with self.music_lock: | |
239 | self.current_audio_segment = new_audio_segment | |
240 | self.stop_playing() | |
241 | if wait: | |
242 | self.wait_end() | |
243 | else: | |
244 | self.stop_playing() | |
245 | self.stopped() | |
246 | ||
247 | def set_gain(self, db_gain): | |
248 | self.db_gain += db_gain | |
249 | self.volume_factor = 10 ** (self.db_gain / 20) | |
250 | ||
251 | def set_volume(self, value, delta=False): | |
252 | [db_gain, self.volume] = gain( | |
253 | value + int(delta) * self.volume, | |
254 | self.volume) | |
255 | ||
256 | self.set_gain(db_gain) | |
257 | ||
258 | def wait_end(self): | |
259 | self.wait_event.clear() | |
260 | self.wait_event.wait() | |
261 |