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author | Ismaël Bouya <ismael.bouya@normalesup.org> | 2016-07-27 21:33:09 +0200 |
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committer | Ismaël Bouya <ismael.bouya@normalesup.org> | 2016-07-27 21:33:09 +0200 |
commit | 63ba5a8dc2aa4ec3e6f203b0ba4db249ecf0b00e (patch) | |
tree | f043ab215425aca3434bf178029dad9f9e62dbe9 /helpers/music_file.py | |
parent | 35bde798b6cda13579337b0ec5a803fdd5eab19a (diff) | |
download | MusicSampler-63ba5a8dc2aa4ec3e6f203b0ba4db249ecf0b00e.tar.gz MusicSampler-63ba5a8dc2aa4ec3e6f203b0ba4db249ecf0b00e.tar.zst MusicSampler-63ba5a8dc2aa4ec3e6f203b0ba4db249ecf0b00e.zip |
Rename helpers to music_sampler
Diffstat (limited to 'helpers/music_file.py')
-rw-r--r-- | helpers/music_file.py | 378 |
1 files changed, 0 insertions, 378 deletions
diff --git a/helpers/music_file.py b/helpers/music_file.py deleted file mode 100644 index 2d3ba72..0000000 --- a/helpers/music_file.py +++ /dev/null | |||
@@ -1,378 +0,0 @@ | |||
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 | from .music_effect import GainEffect | ||
14 | |||
15 | file_lock = Lock("file") | ||
16 | |||
17 | class MusicFile: | ||
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', | ||
35 | 'dest': 'loading', | ||
36 | 'after': 'poll_loaded' | ||
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 | # if a child has no transitions, then it is bubbled to the parent, | ||
53 | # and we don't want that. Not useful in that machine precisely. | ||
54 | 'conditions': ['is_loaded'] | ||
55 | }, | ||
56 | { | ||
57 | 'trigger': 'pause', | ||
58 | 'source': 'loaded_playing', | ||
59 | 'dest': 'loaded_paused' | ||
60 | }, | ||
61 | { | ||
62 | 'trigger': 'unpause', | ||
63 | 'source': 'loaded_paused', | ||
64 | 'dest': 'loaded_playing' | ||
65 | }, | ||
66 | { | ||
67 | 'trigger': 'stop_playing', | ||
68 | 'source': ['loaded_playing','loaded_paused'], | ||
69 | 'dest': 'loaded_stopping' | ||
70 | }, | ||
71 | { | ||
72 | 'trigger': 'stopped', | ||
73 | 'source': '*', | ||
74 | 'dest': 'loaded', | ||
75 | 'before': 'trigger_stopped_events', | ||
76 | 'conditions': ['is_in_use'] | ||
77 | } | ||
78 | ] | ||
79 | |||
80 | def __init__(self, filename, mapping, name=None, gain=1): | ||
81 | Machine(model=self, states=self.STATES, | ||
82 | transitions=self.TRANSITIONS, initial='initial', | ||
83 | ignore_invalid_triggers=True) | ||
84 | |||
85 | self.loaded_callbacks = [] | ||
86 | self.mapping = mapping | ||
87 | self.filename = filename | ||
88 | self.name = name or filename | ||
89 | self.audio_segment = None | ||
90 | self.initial_volume_factor = gain | ||
91 | self.music_lock = Lock("music__" + filename) | ||
92 | |||
93 | threading.Thread(name="MSMusicLoad", target=self.load).start() | ||
94 | |||
95 | def reload_properties(self, name=None, gain=1): | ||
96 | self.name = name or self.filename | ||
97 | if gain != self.initial_volume_factor: | ||
98 | self.initial_volume_factor = gain | ||
99 | self.reload_music_file() | ||
100 | |||
101 | def reload_music_file(self): | ||
102 | with file_lock: | ||
103 | try: | ||
104 | if self.filename.startswith("/"): | ||
105 | filename = self.filename | ||
106 | else: | ||
107 | filename = Config.music_path + self.filename | ||
108 | |||
109 | debug_print("Reloading « {} »".format(self.name)) | ||
110 | initial_db_gain = gain(self.initial_volume_factor * 100) | ||
111 | self.audio_segment = pydub.AudioSegment \ | ||
112 | .from_file(filename) \ | ||
113 | .set_frame_rate(Config.frame_rate) \ | ||
114 | .set_channels(Config.channels) \ | ||
115 | .set_sample_width(Config.sample_width) \ | ||
116 | .apply_gain(initial_db_gain) | ||
117 | except Exception as e: | ||
118 | error_print("failed to reload « {} »: {}"\ | ||
119 | .format(self.name, e)) | ||
120 | self.loading_error = e | ||
121 | self.to_failed() | ||
122 | else: | ||
123 | debug_print("Reloaded « {} »".format(self.name)) | ||
124 | |||
125 | # Machine related events | ||
126 | def on_enter_loading(self): | ||
127 | with file_lock: | ||
128 | try: | ||
129 | if self.filename.startswith("/"): | ||
130 | filename = self.filename | ||
131 | else: | ||
132 | filename = Config.music_path + self.filename | ||
133 | |||
134 | debug_print("Loading « {} »".format(self.name)) | ||
135 | self.mixer = self.mapping.mixer or Mixer() | ||
136 | initial_db_gain = gain(self.initial_volume_factor * 100) | ||
137 | self.audio_segment = pydub.AudioSegment \ | ||
138 | .from_file(filename) \ | ||
139 | .set_frame_rate(Config.frame_rate) \ | ||
140 | .set_channels(Config.channels) \ | ||
141 | .set_sample_width(Config.sample_width) \ | ||
142 | .apply_gain(initial_db_gain) | ||
143 | self.sound_duration = self.audio_segment.duration_seconds | ||
144 | except Exception as e: | ||
145 | error_print("failed to load « {} »: {}".format(self.name, e)) | ||
146 | self.loading_error = e | ||
147 | self.fail() | ||
148 | else: | ||
149 | self.success() | ||
150 | debug_print("Loaded « {} »".format(self.name)) | ||
151 | |||
152 | def on_enter_loaded(self): | ||
153 | self.cleanup() | ||
154 | |||
155 | def cleanup(self): | ||
156 | self.gain_effects = [] | ||
157 | self.set_gain(0, absolute=True) | ||
158 | self.current_audio_segment = None | ||
159 | self.volume = 100 | ||
160 | self.wait_event = threading.Event() | ||
161 | self.current_loop = 0 | ||
162 | |||
163 | def on_enter_loaded_playing(self): | ||
164 | self.mixer.add_file(self) | ||
165 | |||
166 | # Machine related states | ||
167 | def is_in_use(self): | ||
168 | return self.is_loaded(allow_substates=True) and not self.is_loaded() | ||
169 | |||
170 | def is_in_use_not_stopping(self): | ||
171 | return self.is_loaded_playing() or self.is_loaded_paused() | ||
172 | |||
173 | # Machine related triggers | ||
174 | def trigger_stopped_events(self): | ||
175 | self.mixer.remove_file(self) | ||
176 | self.wait_event.set() | ||
177 | self.cleanup() | ||
178 | |||
179 | # Actions and properties called externally | ||
180 | @property | ||
181 | def sound_position(self): | ||
182 | if self.is_in_use(): | ||
183 | return self.current_frame / self.current_audio_segment.frame_rate | ||
184 | else: | ||
185 | return 0 | ||
186 | |||
187 | def play(self, fade_in=0, volume=100, loop=0, start_at=0): | ||
188 | self.set_gain(gain(volume) + self.mapping.master_gain, absolute=True) | ||
189 | self.volume = volume | ||
190 | if loop < 0: | ||
191 | self.last_loop = float('inf') | ||
192 | else: | ||
193 | self.last_loop = loop | ||
194 | |||
195 | with self.music_lock: | ||
196 | self.current_audio_segment = self.audio_segment | ||
197 | self.current_frame = int(start_at * self.audio_segment.frame_rate) | ||
198 | |||
199 | self.start_playing() | ||
200 | |||
201 | if fade_in > 0: | ||
202 | db_gain = gain(self.volume, 0)[0] | ||
203 | self.set_gain(-db_gain) | ||
204 | self.add_fade_effect(db_gain, fade_in) | ||
205 | |||
206 | def seek(self, value=0, delta=False): | ||
207 | if not self.is_in_use_not_stopping(): | ||
208 | return | ||
209 | |||
210 | with self.music_lock: | ||
211 | self.abandon_all_effects() | ||
212 | if delta: | ||
213 | frame_count = int(self.audio_segment.frame_count()) | ||
214 | frame_diff = int(value * self.audio_segment.frame_rate) | ||
215 | self.current_frame += frame_diff | ||
216 | while self.current_frame < 0: | ||
217 | self.current_loop -= 1 | ||
218 | self.current_frame += frame_count | ||
219 | while self.current_frame > frame_count: | ||
220 | self.current_loop += 1 | ||
221 | self.current_frame -= frame_count | ||
222 | if self.current_loop < 0: | ||
223 | self.current_loop = 0 | ||
224 | self.current_frame = 0 | ||
225 | if self.current_loop > self.last_loop: | ||
226 | self.current_loop = self.last_loop | ||
227 | self.current_frame = frame_count | ||
228 | else: | ||
229 | self.current_frame = max( | ||
230 | 0, | ||
231 | int(value * self.audio_segment.frame_rate)) | ||
232 | |||
233 | def stop(self, fade_out=0, wait=False, set_wait_id=None): | ||
234 | if self.is_loaded_playing(): | ||
235 | ms = int(self.sound_position * 1000) | ||
236 | ms_fo = max(1, int(fade_out * 1000)) | ||
237 | |||
238 | new_audio_segment = self.current_audio_segment[: ms+ms_fo] \ | ||
239 | .fade_out(ms_fo) | ||
240 | with self.music_lock: | ||
241 | self.current_audio_segment = new_audio_segment | ||
242 | self.stop_playing() | ||
243 | if wait: | ||
244 | if set_wait_id is not None: | ||
245 | self.mapping.add_wait_id(set_wait_id, self.wait_event) | ||
246 | self.wait_end() | ||
247 | else: | ||
248 | self.stopped() | ||
249 | |||
250 | def abandon_all_effects(self): | ||
251 | db_gain = 0 | ||
252 | for gain_effect in self.gain_effects: | ||
253 | db_gain += gain_effect.get_last_gain() | ||
254 | |||
255 | self.gain_effects = [] | ||
256 | self.set_gain(db_gain) | ||
257 | |||
258 | def set_volume(self, value, delta=False, fade=0): | ||
259 | [db_gain, self.volume] = gain( | ||
260 | value + int(delta) * self.volume, | ||
261 | self.volume) | ||
262 | |||
263 | self.set_gain_with_effect(db_gain, fade=fade) | ||
264 | |||
265 | def set_gain_with_effect(self, db_gain, fade=0): | ||
266 | if not self.is_in_use(): | ||
267 | return | ||
268 | |||
269 | if fade > 0: | ||
270 | self.add_fade_effect(db_gain, fade) | ||
271 | else: | ||
272 | self.set_gain(db_gain) | ||
273 | |||
274 | def wait_end(self): | ||
275 | self.wait_event.clear() | ||
276 | self.wait_event.wait() | ||
277 | |||
278 | # Let other subscribe for an event when they are ready | ||
279 | def subscribe_loaded(self, callback): | ||
280 | # FIXME: should lock to be sure we have no race, but it makes the | ||
281 | # initialization screen not showing until everything is loaded | ||
282 | if self.is_loaded(allow_substates=True): | ||
283 | callback(True) | ||
284 | elif self.is_failed(): | ||
285 | callback(False) | ||
286 | else: | ||
287 | self.loaded_callbacks.append(callback) | ||
288 | |||
289 | def poll_loaded(self): | ||
290 | for callback in self.loaded_callbacks: | ||
291 | callback(self.is_loaded()) | ||
292 | self.loaded_callbacks = [] | ||
293 | |||
294 | # Callbacks | ||
295 | def finished_callback(self): | ||
296 | self.stopped() | ||
297 | |||
298 | def play_callback(self, out_data_length, frame_count): | ||
299 | if self.is_loaded_paused(): | ||
300 | return b'\0' * out_data_length | ||
301 | |||
302 | with self.music_lock: | ||
303 | [data, nb_frames] = self.get_next_sample(frame_count) | ||
304 | if nb_frames < frame_count: | ||
305 | if self.is_loaded_playing() and\ | ||
306 | self.current_loop < self.last_loop: | ||
307 | self.current_loop += 1 | ||
308 | self.current_frame = 0 | ||
309 | [new_data, new_nb_frames] = self.get_next_sample( | ||
310 | frame_count - nb_frames) | ||
311 | data += new_data | ||
312 | nb_frames += new_nb_frames | ||
313 | elif nb_frames == 0: | ||
314 | # FIXME: too slow when mixing multiple streams | ||
315 | threading.Thread( | ||
316 | name="MSFinishedCallback", | ||
317 | target=self.finished_callback).start() | ||
318 | |||
319 | return data.ljust(out_data_length, b'\0') | ||
320 | |||
321 | # Helpers | ||
322 | def set_gain(self, db_gain, absolute=False): | ||
323 | if absolute: | ||
324 | self.db_gain = db_gain | ||
325 | else: | ||
326 | self.db_gain += db_gain | ||
327 | |||
328 | def get_next_sample(self, frame_count): | ||
329 | fw = self.audio_segment.frame_width | ||
330 | |||
331 | data = b"" | ||
332 | nb_frames = 0 | ||
333 | |||
334 | segment = self.current_audio_segment | ||
335 | max_val = int(segment.frame_count()) | ||
336 | |||
337 | start_i = max(self.current_frame, 0) | ||
338 | end_i = min(self.current_frame + frame_count, max_val) | ||
339 | data += segment._data[start_i*fw : end_i*fw] | ||
340 | nb_frames += end_i - start_i | ||
341 | self.current_frame += end_i - start_i | ||
342 | |||
343 | volume_factor = self.volume_factor(self.effects_next_gain(nb_frames)) | ||
344 | |||
345 | data = audioop.mul(data, Config.sample_width, volume_factor) | ||
346 | |||
347 | return [data, nb_frames] | ||
348 | |||
349 | def add_fade_effect(self, db_gain, fade_duration): | ||
350 | if not self.is_in_use(): | ||
351 | return | ||
352 | |||
353 | self.gain_effects.append(GainEffect( | ||
354 | "fade", | ||
355 | self.current_audio_segment, | ||
356 | self.current_loop, | ||
357 | self.sound_position, | ||
358 | self.sound_position + fade_duration, | ||
359 | gain=db_gain)) | ||
360 | |||
361 | def effects_next_gain(self, frame_count): | ||
362 | db_gain = 0 | ||
363 | for gain_effect in self.gain_effects: | ||
364 | [new_gain, last_gain] = gain_effect.get_next_gain( | ||
365 | self.current_frame, | ||
366 | self.current_loop, | ||
367 | frame_count) | ||
368 | if last_gain: | ||
369 | self.set_gain(new_gain) | ||
370 | self.gain_effects.remove(gain_effect) | ||
371 | else: | ||
372 | db_gain += new_gain | ||
373 | return db_gain | ||
374 | |||
375 | |||
376 | def volume_factor(self, additional_gain=0): | ||
377 | return 10 ** ( (self.db_gain + additional_gain) / 20) | ||
378 | |||