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