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1 | import threading | |
2 | import pydub | |
3 | import pygame | |
4 | import math | |
5 | import time | |
6 | from transitions.extensions import HierarchicalMachine as Machine | |
7 | ||
8 | class MusicFile(Machine): | |
9 | def __init__(self, filename, lock, channel_id, name = None, gain = 1): | |
10 | states = [ | |
11 | 'initial', | |
12 | 'loading', | |
13 | 'failed', | |
14 | { 'name': 'loaded', 'children': ['stopped', 'playing', 'paused'] } | |
15 | ] | |
16 | transitions = [ | |
17 | { 'trigger': 'load', 'source': 'initial', 'dest': 'loading'}, | |
18 | { 'trigger': 'fail', 'source': 'loading', 'dest': 'failed'}, | |
19 | { 'trigger': 'success', 'source': 'loading', 'dest': 'loaded_stopped'}, | |
20 | #{ 'trigger': 'play', 'source': 'loaded_stopped', 'dest': 'loaded_playing'}, | |
21 | #{ 'trigger': 'pause', 'source': 'loaded_playing', 'dest': 'loaded_paused'}, | |
22 | #{ 'trigger': 'stop', 'source': ['loaded_playing','loaded_paused'], 'dest': 'loaded_stopped'} | |
23 | ] | |
24 | ||
25 | Machine.__init__(self, states=states, transitions=transitions, initial='initial') | |
26 | ||
27 | self.filename = filename | |
28 | self.channel_id = channel_id | |
29 | self.name = name or filename | |
30 | self.raw_data = None | |
31 | self.gain = gain | |
32 | ||
33 | self.flag_paused = False | |
34 | threading.Thread(name = "MSMusicLoad", target = self.load, kwargs = {'lock': lock}).start() | |
35 | ||
36 | def on_enter_loading(self, lock=None): | |
37 | lock.acquire() | |
38 | try: | |
39 | print("Loading « {} »".format(self.name)) | |
40 | volume_factor = 20 * math.log10(self.gain) | |
41 | audio_segment = pydub.AudioSegment.from_file(self.filename).set_frame_rate(44100).apply_gain(volume_factor) | |
42 | self.sound_duration = audio_segment.duration_seconds | |
43 | self.raw_data = audio_segment.raw_data | |
44 | except Exception as e: | |
45 | print("failed to load « {} »: {}".format(self.name, e)) | |
46 | self.loading_error = e | |
47 | self.fail() | |
48 | else: | |
49 | self.success() | |
50 | print("Loaded « {} »".format(self.name)) | |
51 | finally: | |
52 | lock.release() | |
53 | ||
54 | def check_is_loaded(self): | |
55 | return self.state.startswith('loaded_') | |
56 | ||
57 | def is_playing(self): | |
58 | return self.channel().get_busy() | |
59 | ||
60 | def is_paused(self): | |
61 | return self.flag_paused | |
62 | ||
63 | @property | |
64 | def sound_position(self): | |
65 | if self.is_playing() and not self.is_paused(): | |
66 | return min(time.time() - self.started_at, self.sound_duration) | |
67 | elif self.is_playing() and self.is_paused(): | |
68 | return min(self.paused_at - self.started_at, self.sound_duration) | |
69 | else: | |
70 | return 0 | |
71 | ||
72 | def play(self, fade_in = 0, volume = 100, start_at = 0): | |
73 | self.set_volume(volume) | |
74 | ||
75 | if start_at > 0: | |
76 | raw_data_length = len(self.raw_data) | |
77 | start_offset = int((raw_data_length / self.sound_duration) * start_at) | |
78 | start_offset = start_offset - (start_offset % 2) | |
79 | sound = pygame.mixer.Sound(self.raw_data[start_offset:]) | |
80 | else: | |
81 | sound = pygame.mixer.Sound(self.raw_data) | |
82 | ||
83 | self.started_at = time.time() | |
84 | self.channel().play(sound, fade_ms = int(fade_in * 1000)) | |
85 | self.flag_paused = False | |
86 | ||
87 | def pause(self): | |
88 | self.paused_at = time.time() | |
89 | self.channel().pause() | |
90 | self.flag_paused = True | |
91 | ||
92 | def unpause(self): | |
93 | self.started_at += (time.time() - self.paused_at) | |
94 | self.channel().unpause() | |
95 | self.flag_paused = False | |
96 | ||
97 | def stop(self, fade_out = 0): | |
98 | if fade_out > 0: | |
99 | self.channel().fadeout(int(fade_out * 1000)) | |
100 | else: | |
101 | self.channel().stop() | |
102 | ||
103 | def set_volume(self, value): | |
104 | if value < 0: | |
105 | value = 0 | |
106 | if value > 100: | |
107 | value = 100 | |
108 | self.channel().set_volume(value / 100) | |
109 | ||
110 | def wait_end(self): | |
111 | pass | |
112 | ||
113 | def channel(self): | |
114 | return pygame.mixer.Channel(self.channel_id) |