4 from transitions
.extensions
import HierarchicalMachine
as Machine
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
15 file_lock
= Lock("file")
17 class MusicFile(Machine
):
18 def __init__(self
, filename
, mapping
, name
=None, gain
=1):
25 'children': ['stopped', 'playing', 'paused', 'stopping']
42 'dest': 'loaded_stopped'
45 'trigger': 'start_playing',
46 'source': 'loaded_stopped',
47 'dest': 'loaded_playing'
51 'source': 'loaded_playing',
52 'dest': 'loaded_paused'
56 'source': 'loaded_paused',
57 'dest': 'loaded_playing'
60 'trigger': 'stop_playing',
61 'source': ['loaded_playing','loaded_paused'],
62 'dest': 'loaded_stopping'
66 'source': 'loaded_stopping',
67 'dest': 'loaded_stopped',
68 'after': 'trigger_stopped_events'
72 Machine
.__init
__(self
, states
=states
,
73 transitions
=transitions
, initial
='initial',
74 ignore_invalid_triggers
=True)
77 self
.mapping
= mapping
78 self
.filename
= filename
79 self
.name
= name
or filename
80 self
.audio_segment
= None
81 self
.audio_segment_frame_width
= 0
82 self
.initial_volume_factor
= gain
83 self
.music_lock
= Lock("music__" + filename
)
84 self
.wait_event
= threading
.Event()
86 self
.gain_effects
= []
88 threading
.Thread(name
="MSMusicLoad", target
=self
.load
).start()
90 def on_enter_loading(self
):
93 debug_print("Loading « {} »".format(self
.name
))
94 self
.mixer
= self
.mapping
.mixer
or Mixer()
95 initial_db_gain
= gain(self
.initial_volume_factor
* 100)
96 self
.audio_segment
= pydub
.AudioSegment \
97 .from_file(self
.filename
) \
98 .set_frame_rate(Config
.frame_rate
) \
99 .set_channels(Config
.channels
) \
100 .set_sample_width(Config
.sample_width
) \
101 .apply_gain(initial_db_gain
)
102 self
.audio_segment_frame_width
= self
.audio_segment
.frame_width
103 self
.sound_duration
= self
.audio_segment
.duration_seconds
104 except Exception as e
:
105 error_print("failed to load « {} »: {}".format(self
.name
, e
))
106 self
.loading_error
= e
110 debug_print("Loaded « {} »".format(self
.name
))
112 def check_is_loaded(self
):
113 return self
.state
.startswith('loaded_')
115 def is_not_stopped(self
):
116 return self
.check_is_loaded() and not self
.is_loaded_stopped()
119 return self
.is_loaded_paused()
122 def sound_position(self
):
123 if self
.is_not_stopped():
124 return self
.current_frame
/ self
.current_audio_segment
.frame_rate
128 def play(self
, fade_in
=0, volume
=100, loop
=0, start_at
=0):
129 # FIXME: create a "reinitialize" method
130 self
.gain_effects
= []
131 self
.set_gain(gain(volume
) + self
.mapping
.master_gain
, absolute
=True)
133 self
.current_loop
= 0
135 self
.last_loop
= float('inf')
137 self
.last_loop
= loop
139 with self
.music_lock
:
140 self
.current_audio_segment
= self
.audio_segment
141 self
.current_frame
= int(start_at
* self
.audio_segment
.frame_rate
)
143 db_gain
= gain(self
.volume
, 0)[0]
144 self
.set_gain(-db_gain
)
145 self
.gain_effects
.append(GainEffect(
147 self
.current_audio_segment
,
150 self
.sound_position
+ fade_in
,
155 def on_enter_loaded_playing(self
):
156 self
.mixer
.add_file(self
)
158 def finished_callback(self
):
159 if self
.is_loaded_playing():
161 if self
.is_loaded_stopping():
164 def trigger_stopped_events(self
):
165 self
.mixer
.remove_file(self
)
166 self
.wait_event
.set()
168 def play_callback(self
, out_data_length
, frame_count
):
169 if self
.is_loaded_paused():
170 return b
'\0' * out_data_length
172 with self
.music_lock
:
173 [data
, nb_frames
] = self
.get_next_sample(frame_count
)
174 if nb_frames
< frame_count
:
175 if self
.is_loaded_playing() and\
176 self
.current_loop
< self
.last_loop
:
177 self
.current_loop
+= 1
178 self
.current_frame
= 0
179 [new_data
, new_nb_frames
] = self
.get_next_sample(
180 frame_count
- nb_frames
)
182 nb_frames
+= new_nb_frames
184 # FIXME: too slow when mixing multiple streams
186 name
="MSFinishedCallback",
187 target
=self
.finished_callback
).start()
189 return data
.ljust(out_data_length
, b
'\0')
191 def get_next_sample(self
, frame_count
):
192 fw
= self
.audio_segment_frame_width
197 segment
= self
.current_audio_segment
198 max_val
= int(segment
.frame_count())
200 start_i
= max(self
.current_frame
, 0)
201 end_i
= min(self
.current_frame
+ frame_count
, max_val
)
202 data
+= segment
._data
[start_i
*fw
: end_i
*fw
]
203 nb_frames
+= end_i
- start_i
204 self
.current_frame
+= end_i
- start_i
206 volume_factor
= self
.volume_factor(self
.effects_next_gain(nb_frames
))
208 data
= audioop
.mul(data
, Config
.sample_width
, volume_factor
)
210 return [data
, nb_frames
]
212 def seek(self
, value
=0, delta
=False):
213 # We don't want to do that while stopping
214 if not (self
.is_loaded_playing() or self
.is_loaded_paused()):
216 with self
.music_lock
:
217 self
.abandon_all_effects()
219 frame_count
= int(self
.audio_segment
.frame_count())
220 frame_diff
= int(value
* self
.audio_segment
.frame_rate
)
221 self
.current_frame
+= frame_diff
222 while self
.current_frame
< 0:
223 self
.current_loop
-= 1
224 self
.current_frame
+= frame_count
225 while self
.current_frame
> frame_count
:
226 self
.current_loop
+= 1
227 self
.current_frame
-= frame_count
228 if self
.current_loop
< 0:
229 self
.current_loop
= 0
230 self
.current_frame
= 0
231 if self
.current_loop
> self
.last_loop
:
232 self
.current_loop
= self
.last_loop
233 self
.current_frame
= frame_count
235 self
.current_frame
= max(
237 int(value
* self
.audio_segment
.frame_rate
))
239 def effects_next_gain(self
, frame_count
):
241 for gain_effect
in self
.gain_effects
:
242 [new_gain
, last_gain
] = gain_effect
.get_next_gain(
247 self
.set_gain(new_gain
)
248 self
.gain_effects
.remove(gain_effect
)
254 def abandon_all_effects(self
):
256 for gain_effect
in self
.gain_effects
:
257 db_gain
+= gain_effect
.get_last_gain()
259 self
.gain_effects
= []
260 self
.set_gain(db_gain
)
262 def stop(self
, fade_out
=0, wait
=False, set_wait_id
=None):
263 if self
.is_loaded_playing():
264 ms
= int(self
.sound_position
* 1000)
265 ms_fo
= max(1, int(fade_out
* 1000))
267 new_audio_segment
= self
.current_audio_segment
[: ms
+ms_fo
] \
269 with self
.music_lock
:
270 self
.current_audio_segment
= new_audio_segment
273 if set_wait_id
is not None:
274 self
.mapping
.add_wait_id(set_wait_id
, self
.wait_event
)
280 def volume_factor(self
, additional_gain
):
281 return 10 ** ( (self
.db_gain
+ additional_gain
) / 20)
283 def set_gain(self
, db_gain
, absolute
=False):
285 self
.db_gain
= db_gain
287 self
.db_gain
+= db_gain
289 def set_volume(self
, value
, delta
=False, fade
=0):
290 [db_gain
, self
.volume
] = gain(
291 value
+ int(delta
) * self
.volume
,
294 if not (self
.is_loaded_playing() or self
.is_loaded_paused()):
298 self
.gain_effects
.append(GainEffect(
300 self
.current_audio_segment
,
303 self
.sound_position
+ fade
,
306 self
.set_gain(db_gain
)
309 self
.wait_event
.clear()
310 self
.wait_event
.wait()