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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 os.path |
7 | ||
ccda4cb9 IB |
8 | import audioop |
9 | ||
29597680 | 10 | from .lock import Lock |
a24c34bc | 11 | from . import Config, gain, debug_print, error_print |
af27d782 | 12 | from .mixer import Mixer |
aee1334c | 13 | from .music_effect import GainEffect |
1b4b78f5 | 14 | |
29597680 IB |
15 | file_lock = Lock("file") |
16 | ||
108f858f | 17 | class MusicFile: |
20586193 IB |
18 | STATES = [ |
19 | 'initial', | |
20 | 'loading', | |
21 | 'failed', | |
22 | { | |
23 | 'name': 'loaded', | |
24 | 'children': [ | |
25 | 'playing', | |
26 | 'paused', | |
27 | 'stopping' | |
28 | ] | |
29 | } | |
30 | ] | |
31 | TRANSITIONS = [ | |
32 | { | |
33 | 'trigger': 'load', | |
34 | 'source': 'initial', | |
b7ca3fc2 IB |
35 | 'dest': 'loading', |
36 | 'after': 'poll_loaded' | |
20586193 IB |
37 | }, |
38 | { | |
39 | 'trigger': 'fail', | |
40 | 'source': 'loading', | |
41 | 'dest': 'failed' | |
42 | }, | |
43 | { | |
44 | 'trigger': 'success', | |
45 | 'source': 'loading', | |
46 | 'dest': 'loaded' | |
47 | }, | |
48 | { | |
49 | 'trigger': 'start_playing', | |
50 | 'source': 'loaded', | |
51 | 'dest': 'loaded_playing' | |
52 | }, | |
53 | { | |
54 | 'trigger': 'pause', | |
55 | 'source': 'loaded_playing', | |
56 | 'dest': 'loaded_paused' | |
57 | }, | |
58 | { | |
59 | 'trigger': 'unpause', | |
60 | 'source': 'loaded_paused', | |
61 | 'dest': 'loaded_playing' | |
62 | }, | |
63 | { | |
64 | 'trigger': 'stop_playing', | |
65 | 'source': ['loaded_playing','loaded_paused'], | |
66 | 'dest': 'loaded_stopping' | |
67 | }, | |
68 | { | |
69 | 'trigger': 'stopped', | |
70 | 'source': '*', | |
71 | 'dest': 'loaded', | |
b7ca3fc2 IB |
72 | 'before': 'trigger_stopped_events', |
73 | 'conditions': ['is_in_use'] | |
20586193 IB |
74 | } |
75 | ] | |
76 | ||
2e404903 | 77 | def __init__(self, filename, mapping, name=None, gain=1): |
20586193 IB |
78 | Machine(model=self, states=self.STATES, |
79 | transitions=self.TRANSITIONS, initial='initial', | |
51322669 | 80 | ignore_invalid_triggers=True) |
60979de4 | 81 | |
b7ca3fc2 | 82 | self.loaded_callbacks = [] |
1b4b78f5 | 83 | self.mapping = mapping |
be27763f | 84 | self.filename = filename |
9de92b6d | 85 | self.name = name or filename |
29597680 | 86 | self.audio_segment = None |
ccda4cb9 | 87 | self.initial_volume_factor = gain |
29597680 | 88 | self.music_lock = Lock("music__" + filename) |
be27763f | 89 | |
2e404903 | 90 | threading.Thread(name="MSMusicLoad", target=self.load).start() |
29597680 | 91 | |
20586193 | 92 | # Machine related events |
29597680 IB |
93 | def on_enter_loading(self): |
94 | with file_lock: | |
95 | try: | |
a24c34bc IB |
96 | debug_print("Loading « {} »".format(self.name)) |
97 | self.mixer = self.mapping.mixer or Mixer() | |
ccda4cb9 | 98 | initial_db_gain = gain(self.initial_volume_factor * 100) |
2e404903 IB |
99 | self.audio_segment = pydub.AudioSegment \ |
100 | .from_file(self.filename) \ | |
101 | .set_frame_rate(Config.frame_rate) \ | |
102 | .set_channels(Config.channels) \ | |
103 | .set_sample_width(Config.sample_width) \ | |
104 | .apply_gain(initial_db_gain) | |
29597680 IB |
105 | self.sound_duration = self.audio_segment.duration_seconds |
106 | except Exception as e: | |
a24c34bc | 107 | error_print("failed to load « {} »: {}".format(self.name, e)) |
29597680 IB |
108 | self.loading_error = e |
109 | self.fail() | |
110 | else: | |
111 | self.success() | |
a24c34bc | 112 | debug_print("Loaded « {} »".format(self.name)) |
60979de4 | 113 | |
20586193 IB |
114 | def on_enter_loaded(self): |
115 | self.gain_effects = [] | |
116 | self.set_gain(0, absolute=True) | |
117 | self.current_audio_segment = None | |
118 | self.volume = 100 | |
119 | self.wait_event = threading.Event() | |
120 | self.current_loop = 0 | |
121 | ||
122 | def on_enter_loaded_playing(self): | |
123 | self.mixer.add_file(self) | |
be27763f | 124 | |
20586193 IB |
125 | # Machine related states |
126 | def is_in_use(self): | |
127 | return self.is_loaded(allow_substates=True) and not self.is_loaded() | |
0e5d59f7 | 128 | |
20586193 IB |
129 | def is_in_use_not_stopping(self): |
130 | return self.is_loaded_playing() or self.is_loaded_paused() | |
9de92b6d | 131 | |
20586193 IB |
132 | # Machine related triggers |
133 | def trigger_stopped_events(self): | |
134 | self.mixer.remove_file(self) | |
135 | self.wait_event.set() | |
136 | ||
137 | # Actions and properties called externally | |
98ff4305 IB |
138 | @property |
139 | def sound_position(self): | |
20586193 | 140 | if self.is_in_use(): |
29597680 | 141 | return self.current_frame / self.current_audio_segment.frame_rate |
98ff4305 IB |
142 | else: |
143 | return 0 | |
144 | ||
2e404903 | 145 | def play(self, fade_in=0, volume=100, loop=0, start_at=0): |
b37c72a2 | 146 | self.set_gain(gain(volume) + self.mapping.master_gain, absolute=True) |
1b4b78f5 | 147 | self.volume = volume |
0cb786e3 IB |
148 | if loop < 0: |
149 | self.last_loop = float('inf') | |
150 | else: | |
151 | self.last_loop = loop | |
1b4b78f5 | 152 | |
29597680 | 153 | with self.music_lock: |
ccda4cb9 | 154 | self.current_audio_segment = self.audio_segment |
ccc8b4f2 | 155 | self.current_frame = int(start_at * self.audio_segment.frame_rate) |
ccc8b4f2 | 156 | |
29597680 IB |
157 | self.start_playing() |
158 | ||
20586193 IB |
159 | if fade_in > 0: |
160 | db_gain = gain(self.volume, 0)[0] | |
161 | self.set_gain(-db_gain) | |
162 | self.add_fade_effect(db_gain, fade_in) | |
29597680 | 163 | |
20586193 IB |
164 | def seek(self, value=0, delta=False): |
165 | if not self.is_in_use_not_stopping(): | |
166 | return | |
167 | ||
168 | with self.music_lock: | |
169 | self.abandon_all_effects() | |
170 | if delta: | |
171 | frame_count = int(self.audio_segment.frame_count()) | |
172 | frame_diff = int(value * self.audio_segment.frame_rate) | |
173 | self.current_frame += frame_diff | |
174 | while self.current_frame < 0: | |
175 | self.current_loop -= 1 | |
176 | self.current_frame += frame_count | |
177 | while self.current_frame > frame_count: | |
178 | self.current_loop += 1 | |
179 | self.current_frame -= frame_count | |
180 | if self.current_loop < 0: | |
181 | self.current_loop = 0 | |
182 | self.current_frame = 0 | |
183 | if self.current_loop > self.last_loop: | |
184 | self.current_loop = self.last_loop | |
185 | self.current_frame = frame_count | |
186 | else: | |
187 | self.current_frame = max( | |
188 | 0, | |
189 | int(value * self.audio_segment.frame_rate)) | |
190 | ||
191 | def stop(self, fade_out=0, wait=False, set_wait_id=None): | |
29597680 | 192 | if self.is_loaded_playing(): |
20586193 IB |
193 | ms = int(self.sound_position * 1000) |
194 | ms_fo = max(1, int(fade_out * 1000)) | |
195 | ||
196 | new_audio_segment = self.current_audio_segment[: ms+ms_fo] \ | |
197 | .fade_out(ms_fo) | |
198 | with self.music_lock: | |
199 | self.current_audio_segment = new_audio_segment | |
29597680 | 200 | self.stop_playing() |
20586193 IB |
201 | if wait: |
202 | if set_wait_id is not None: | |
203 | self.mapping.add_wait_id(set_wait_id, self.wait_event) | |
204 | self.wait_end() | |
205 | else: | |
29597680 IB |
206 | self.stopped() |
207 | ||
20586193 IB |
208 | def abandon_all_effects(self): |
209 | db_gain = 0 | |
210 | for gain_effect in self.gain_effects: | |
211 | db_gain += gain_effect.get_last_gain() | |
212 | ||
213 | self.gain_effects = [] | |
214 | self.set_gain(db_gain) | |
215 | ||
216 | def set_volume(self, value, delta=False, fade=0): | |
217 | [db_gain, self.volume] = gain( | |
218 | value + int(delta) * self.volume, | |
219 | self.volume) | |
220 | ||
221 | self.set_gain_with_effect(db_gain, fade=fade) | |
222 | ||
223 | def set_gain_with_effect(self, db_gain, fade=0): | |
224 | if not self.is_in_use(): | |
225 | return | |
226 | ||
227 | if fade > 0: | |
228 | self.add_fade_effect(db_gain, fade) | |
229 | else: | |
230 | self.set_gain(db_gain) | |
231 | ||
232 | def wait_end(self): | |
233 | self.wait_event.clear() | |
234 | self.wait_event.wait() | |
235 | ||
b7ca3fc2 IB |
236 | # Let other subscribe for an event when they are ready |
237 | def subscribe_loaded(self, callback): | |
238 | with file_lock: | |
239 | if self.is_loaded(allow_substates=True): | |
240 | callback(True) | |
241 | elif self.is_failed(): | |
242 | callback(False) | |
243 | else: | |
244 | self.loaded_callbacks.append(callback) | |
245 | ||
246 | def poll_loaded(self): | |
247 | for callback in self.loaded_callbacks: | |
248 | callback(self.is_loaded()) | |
249 | self.loaded_callbacks = [] | |
250 | ||
20586193 IB |
251 | # Callbacks |
252 | def finished_callback(self): | |
253 | self.stopped() | |
0deb82a5 | 254 | |
22514f3a IB |
255 | def play_callback(self, out_data_length, frame_count): |
256 | if self.is_loaded_paused(): | |
257 | return b'\0' * out_data_length | |
258 | ||
29597680 | 259 | with self.music_lock: |
ccc8b4f2 IB |
260 | [data, nb_frames] = self.get_next_sample(frame_count) |
261 | if nb_frames < frame_count: | |
0cb786e3 IB |
262 | if self.is_loaded_playing() and\ |
263 | self.current_loop < self.last_loop: | |
1e44fe7e | 264 | self.current_loop += 1 |
ccc8b4f2 | 265 | self.current_frame = 0 |
2e404903 IB |
266 | [new_data, new_nb_frames] = self.get_next_sample( |
267 | frame_count - nb_frames) | |
ccc8b4f2 IB |
268 | data += new_data |
269 | nb_frames += new_nb_frames | |
270 | elif nb_frames == 0: | |
9925ce3b | 271 | # FIXME: too slow when mixing multiple streams |
2e404903 IB |
272 | threading.Thread( |
273 | name="MSFinishedCallback", | |
274 | target=self.finished_callback).start() | |
29597680 | 275 | |
22514f3a | 276 | return data.ljust(out_data_length, b'\0') |
ccc8b4f2 | 277 | |
20586193 IB |
278 | # Helpers |
279 | def set_gain(self, db_gain, absolute=False): | |
280 | if absolute: | |
281 | self.db_gain = db_gain | |
282 | else: | |
283 | self.db_gain += db_gain | |
284 | ||
ccc8b4f2 | 285 | def get_next_sample(self, frame_count): |
20586193 | 286 | fw = self.audio_segment.frame_width |
ccc8b4f2 IB |
287 | |
288 | data = b"" | |
289 | nb_frames = 0 | |
ccc8b4f2 IB |
290 | |
291 | segment = self.current_audio_segment | |
292 | max_val = int(segment.frame_count()) | |
293 | ||
294 | start_i = max(self.current_frame, 0) | |
295 | end_i = min(self.current_frame + frame_count, max_val) | |
2e404903 | 296 | data += segment._data[start_i*fw : end_i*fw] |
ccc8b4f2 IB |
297 | nb_frames += end_i - start_i |
298 | self.current_frame += end_i - start_i | |
299 | ||
aee1334c IB |
300 | volume_factor = self.volume_factor(self.effects_next_gain(nb_frames)) |
301 | ||
302 | data = audioop.mul(data, Config.sample_width, volume_factor) | |
ccda4cb9 | 303 | |
ccc8b4f2 | 304 | return [data, nb_frames] |
be27763f | 305 | |
20586193 IB |
306 | def add_fade_effect(self, db_gain, fade_duration): |
307 | if not self.is_in_use(): | |
52d58baf | 308 | return |
20586193 IB |
309 | |
310 | self.gain_effects.append(GainEffect( | |
311 | "fade", | |
312 | self.current_audio_segment, | |
313 | self.current_loop, | |
314 | self.sound_position, | |
315 | self.sound_position + fade_duration, | |
316 | gain=db_gain)) | |
52d58baf | 317 | |
aee1334c IB |
318 | def effects_next_gain(self, frame_count): |
319 | db_gain = 0 | |
320 | for gain_effect in self.gain_effects: | |
321 | [new_gain, last_gain] = gain_effect.get_next_gain( | |
322 | self.current_frame, | |
1e44fe7e | 323 | self.current_loop, |
aee1334c IB |
324 | frame_count) |
325 | if last_gain: | |
326 | self.set_gain(new_gain) | |
327 | self.gain_effects.remove(gain_effect) | |
328 | else: | |
329 | db_gain += new_gain | |
330 | return db_gain | |
331 | ||
332 | ||
20586193 | 333 | def volume_factor(self, additional_gain=0): |
aee1334c IB |
334 | return 10 ** ( (self.db_gain + additional_gain) / 20) |
335 |