4 from transitions
.extensions
import HierarchicalMachine
as Machine
11 file_lock
= Lock("file")
13 class MusicFile(Machine
):
14 def __init__(self
, filename
, mapping
, name
= None, gain
= 1):
19 { 'name': 'loaded', 'children': ['stopped', 'playing', 'paused', 'stopping'] }
22 { 'trigger': 'load', 'source': 'initial', 'dest': 'loading'}
,
23 { 'trigger': 'fail', 'source': 'loading', 'dest': 'failed'}
,
24 { 'trigger': 'success', 'source': 'loading', 'dest': 'loaded_stopped'}
,
25 { 'trigger': 'start_playing', 'source': 'loaded_stopped', 'dest': 'loaded_playing'}
,
26 { 'trigger': 'pause', 'source': 'loaded_playing', 'dest': 'loaded_paused'}
,
27 { 'trigger': 'unpause', 'source': 'loaded_paused', 'dest': 'loaded_playing'}
,
28 { 'trigger': 'stop_playing', 'source': ['loaded_playing','loaded_paused'], 'dest': 'loaded_stopping'}
,
29 { 'trigger': 'stopped', 'source': 'loaded_stopping', 'dest': 'loaded_stopped', 'after': 'trigger_stopped_events'}
32 Machine
.__init
__(self
, states
=states
, transitions
=transitions
, initial
='initial')
35 self
.mapping
= mapping
36 self
.filename
= filename
37 self
.name
= name
or filename
38 self
.audio_segment
= None
39 self
.audio_segment_frame_width
= 0
40 self
.volume_factor
= gain
41 self
.music_lock
= Lock("music__" + filename
)
42 self
.wait_event
= threading
.Event()
44 threading
.Thread(name
= "MSMusicLoad", target
= self
.load
).start()
46 def on_enter_loading(self
):
49 print("Loading « {} »".format(self
.name
))
50 db_gain
= gain(self
.volume_factor
* 100)
51 self
.audio_segment
= pydub
.AudioSegment
.from_file(self
.filename
).set_frame_rate(44100).set_channels(2).set_sample_width(2).apply_gain(db_gain
)
52 self
.audio_segment_frame_width
= self
.audio_segment
.frame_width
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
60 print("Loaded « {} »".format(self
.name
))
62 def check_is_loaded(self
):
63 return self
.state
.startswith('loaded_')
65 def is_not_stopped(self
):
66 return self
.check_is_loaded() and not self
.is_loaded_stopped()
69 return self
.is_loaded_paused()
72 def sound_position(self
):
73 if self
.is_not_stopped():
74 return self
.current_frame
/ self
.current_audio_segment
.frame_rate
78 def play(self
, fade_in
= 0, volume
= 100, loop
= 0, start_at
= 0):
79 db_gain
= gain(volume
) + self
.mapping
.master_gain
83 ms
= int(start_at
* 1000)
84 ms_fi
= int(fade_in
* 1000)
86 self
.current_audio_segment
= (self
.audio_segment
+ db_gain
)
87 self
.current_frame
= int(start_at
* self
.audio_segment
.frame_rate
)
89 # FIXME: apply it to repeated when looping?
90 self
.a_s_with_effect
= self
.current_audio_segment
[ms
:ms
+ms_fi
].fade_in(ms_fi
)
91 self
.current_frame_with_effect
= 0
93 self
.a_s_with_effect
= None
97 def on_enter_loaded_playing(self
):
98 self
.mapping
.mixer
.add_file(self
)
100 def finished_callback(self
):
101 if self
.is_loaded_playing():
103 if self
.is_loaded_stopping():
106 def trigger_stopped_events(self
):
107 self
.mapping
.mixer
.remove_file(self
)
108 self
.wait_event
.set()
110 def play_callback(self
, out_data_length
, frame_count
):
111 if self
.is_loaded_paused():
112 return b
'\0' * out_data_length
114 with self
.music_lock
:
115 [data
, nb_frames
] = self
.get_next_sample(frame_count
)
116 if nb_frames
< frame_count
:
117 if self
.is_loaded_playing() and self
.loop
!= 0:
119 self
.current_frame
= 0
120 [new_data
, new_nb_frames
] = self
.get_next_sample(frame_count
- nb_frames
)
122 nb_frames
+= new_nb_frames
124 threading
.Thread(name
= "MSFinishedCallback", target
=self
.finished_callback
).start()
126 return data
.ljust(out_data_length
, b
'\0')
128 def get_next_sample(self
, frame_count
):
129 fw
= self
.audio_segment_frame_width
133 if self
.a_s_with_effect
is not None:
134 segment
= self
.a_s_with_effect
135 max_val
= int(segment
.frame_count())
137 start_i
= max(self
.current_frame_with_effect
, 0)
138 end_i
= min(self
.current_frame_with_effect
+ frame_count
, max_val
)
140 data
+= segment
._data
[(start_i
* fw
):(end_i
* fw
)]
142 frame_count
= max(0, self
.current_frame_with_effect
+ frame_count
- max_val
)
144 self
.current_frame_with_effect
+= end_i
- start_i
145 self
.current_frame
+= end_i
- start_i
146 nb_frames
+= end_i
- start_i
149 self
.a_s_with_effect
= None
151 segment
= self
.current_audio_segment
152 max_val
= int(segment
.frame_count())
154 start_i
= max(self
.current_frame
, 0)
155 end_i
= min(self
.current_frame
+ frame_count
, max_val
)
156 data
+= segment
._data
[(start_i
* fw
):(end_i
* fw
)]
157 nb_frames
+= end_i
- start_i
158 self
.current_frame
+= end_i
- start_i
160 return [data
, nb_frames
]
162 def seek(self
, value
= 0, delta
= False):
163 # We don't want to do that while stopping
164 if not (self
.is_loaded_playing() or self
.is_loaded_paused()):
166 with self
.music_lock
:
167 self
.a_s_with_effect
= None
168 self
.current_frame
= max(0, int(delta
) * self
.current_frame
+ int(value
* self
.audio_segment
.frame_rate
))
169 # FIXME: si on fait un seek + delta, adapter le "loop"
171 def stop(self
, fade_out
= 0, wait
= False):
172 if self
.is_loaded_playing():
173 ms
= int(self
.sound_position
* 1000)
174 ms_fo
= max(1, int(fade_out
* 1000))
176 # FIXME: stop fade_out puis seek -5 -> on abandonne le fade ? (cf
177 # commentaire dans fonction seek
178 new_audio_segment
= self
.current_audio_segment
[:ms
+ ms_fo
].fade_out(ms_fo
)
179 with self
.music_lock
:
180 self
.current_audio_segment
= new_audio_segment
188 def set_gain(self
, db_gain
):
189 if not self
.is_not_stopped():
192 new_audio_segment
= self
.current_audio_segment
+ db_gain
194 new_a_s_with_effect
= None
195 if self
.a_s_with_effect
is not None:
196 new_a_s_with_effect
= self
.a_s_with_effect
+ db_gain
198 with self
.music_lock
:
199 self
.current_audio_segment
= new_audio_segment
200 self
.a_s_with_effect
= new_a_s_with_effect
202 def set_volume(self
, value
, delta
= False):
203 [db_gain
, self
.volume
] = gain(value
+ int(delta
) * self
.volume
, self
.volume
)
205 self
.set_gain(db_gain
)
208 self
.wait_event
.clear()
209 self
.wait_event
.wait()
211 # Add some more functions to AudioSegments
212 def get_sample_slice_data(self
, start_sample
=0, end_sample
=float('inf')):
213 max_val
= int(self
.frame_count())
215 start_i
= max(start_sample
, 0) * self
.frame_width
216 end_i
= min(end_sample
, max_val
) * self
.frame_width
218 return self
._data
[start_i
:end_i
]
220 pydub
.AudioSegment
.get_sample_slice_data
= get_sample_slice_data