-
Notifications
You must be signed in to change notification settings - Fork 13
/
pp_imageplayer.py
364 lines (289 loc) · 13.3 KB
/
pp_imageplayer.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
import PIL.Image
import PIL.ImageTk
import PIL.ImageEnhance
from Tkinter import *
import Tkinter
import os
import time
from pp_resourcereader import ResourceReader
from pp_utils import Monitor
class ImagePlayer:
""" Displays an image on a canvas for a period of time. Image display can be interrupted
Implements animation of transitions but Pi is too slow without GPU aceleration."""
# slide state constants
NO_SLIDE = 0
SLIDE_IN = 1
SLIDE_DWELL= 2
SLIDE_OUT= 3
# *******************
# external commands
# *******************
def __init__(self,canvas,cd,track_params):
"""
canvas - the canvas onto which the image is to be drawn
cd - dictionary of show parameters
track_params - disctionary of track paramters
"""
self.mon=Monitor()
self.mon.on()
self.canvas=canvas
self.cd=cd
self.track_params=track_params
# open resources
self.rr=ResourceReader()
# get config from medialist if there.
if 'duration' in self.track_params and self.track_params['duration']<>"":
self.duration= int(self.track_params['duration'])
else:
self.duration= int(self.cd['duration'])
if 'transition' in self.track_params and self.track_params['transition']<>"":
self.transition= self.track_params['transition']
else:
self.transition= self.cd['transition']
# keep dwell and porch as an integer multiple of tick
self.porch = 1000 #length of pre and post porches for an image (milliseconds)
self.tick = 100 # tick time for image display (milliseconds)
self.dwell = (1000*self.duration)- (2*self.porch)
if self.dwell<0: self.dwell=0
self.centre_x = int(self.canvas['width'])/2
self.centre_y = int(self.canvas['height'])/2
def play(self,
track,
end_callback,
ready_callback,
enable_menu=False,
starting_callback=None,
playing_callback=None,
ending_callback=None):
# instantiate arguments
self.track=track
self.enable_menu=enable_menu
self.ready_callback=ready_callback
self.end_callback=end_callback
#init state and signals
self.state=ImagePlayer.NO_SLIDE
self.quit_signal=False
self.kill_required_signal=False
self.error=False
self._tick_timer=None
self.drawn=None
self.paused=False
self.pause_text=None
if os.path.exists(self.track)==True:
self.pil_image=PIL.Image.open(self.track)
# adjust brightness and rotate (experimental)
# pil_image_enhancer=PIL.ImageEnhance.Brightness(pil_image)
# pil_image=pil_image_enhancer.enhance(0.1)
# pil_image=pil_image.rotate(45)
# tk_image = PIL.ImageTk.PhotoImage(pil_image)
else:
self.pil_image=None
# display 'Out of Order' for 7 seconds
self.dwell = (1000*7)- (2*self.porch)
if self.dwell<0: self.dwell=0
# and start image rendering
self._start_front_porch()
def key_pressed(self,key_name):
if key_name=='':
return
elif key_name in ('p',' '):
self.pause()
elif key_name=='escape':
self._stop()
return
def button_pressed(self,button,edge):
if button =='pause':
self.pause()
elif button=='stop':
self._stop()
return
def terminate(self,reason):
if reason=='error':
self.error=True
self.quit_signal=True
else:
self.kill_required_signal=True
self.quit_signal=True
def pause(self):
if not self.paused:
self.paused = True
else:
self.paused=False
# *******************
# internal functions
# *******************
def _stop(self):
self.quit_signal=True
def _error(self):
self.error=True
self.quit_signal=True
#called when back porch has completed or quit signal is received
def _end(self,reason,message):
if self._tick_timer<>None:
self.canvas.after_cancel(self._tick_timer)
self._tick_timer=None
self.quit_signal=False
# self.canvas.delete(ALL)
self.canvas.update_idletasks( )
self.state=self.NO_SLIDE
if self.error==True:
self.end_callback("error",message)
self=None
elif self.kill_required_signal==True:
self.end_callback("killed",message)
self=None
else:
self.end_callback(reason,message)
self=None
def resource(self,section,item):
value=self.rr.get(section,item)
if value==False:
self.mon.err(self, "resource: "+section +': '+ item + " not found" )
self._error()
else:
return value
def _start_front_porch(self):
self.state=ImagePlayer.SLIDE_IN
self.porch_counter=0
if self.ready_callback<>None: self.ready_callback()
if self.transition=="cut":
#just display the slide full brightness. No need for porch but used for symmetry
if self.pil_image<>None:
self.tk_img=PIL.ImageTk.PhotoImage(self.pil_image)
self.drawn = self.canvas.create_image(self.centre_x, self.centre_y,
image=self.tk_img, anchor=CENTER)
elif self.transition=="fade":
#experimental start black and increase brightness (controlled by porch_counter).
self._display_image()
elif self.transition == "slide":
#experimental, start in middle and move to right (controlled by porch_counter)
if self.pil_image<>None:
self.tk_img=PIL.ImageTk.PhotoImage(self.pil_image)
self.drawn = self.canvas.create_image(self.centre_x, self.centre_y,
image=self.tk_img, anchor=CENTER)
elif self.transition=="crop":
#experimental, start in middle and crop from right (controlled by porch_counter)
if self.pil_image<>None:
self.tk_img=PIL.ImageTk.PhotoImage(self.pil_image)
self.drawn = self.canvas.create_image(self.centre_x, self.centre_y,
image=self.tk_img, anchor=CENTER)
self._tick_timer=self.canvas.after(self.tick, self._do_front_porch)
def _do_front_porch(self):
if self.quit_signal == True:
self._end('normal','user quit')
else:
self.porch_counter=self.porch_counter+1
# print "doing slide front porch " +str(self.porch_counter)
self._display_image()
if self.porch_counter==self.porch/self.tick:
self._start_dwell()
else:
self._tick_timer=self.canvas.after(self.tick,self._do_front_porch)
def _start_dwell(self):
self.state=ImagePlayer.SLIDE_DWELL
self.dwell_counter=0
self._tick_timer=self.canvas.after(self.tick, self._do_dwell)
def _do_dwell(self):
if self.quit_signal == True:
self.mon.log(self,"quit received")
self._end('normal','user quit')
else:
if self.paused == False:
self.dwell_counter=self.dwell_counter+1
# one time flipping of pause text
if self.paused==True and self.pause_text==None:
self.pause_text=self.canvas.create_text(100,100, anchor=NW,
text=self.resource('imageplayer','m01'),
fill="white",
font="arial 25 bold")
self.canvas.update_idletasks( )
if self.paused==False and self.pause_text<>None:
self.canvas.delete(self.pause_text)
self.pause_text=None
self.canvas.update_idletasks( )
if self.dwell_counter==self.dwell/self.tick:
self._start_back_porch()
else:
self._tick_timer=self.canvas.after(self.tick, self._do_dwell)
def _start_back_porch(self):
self.state=ImagePlayer.SLIDE_OUT
self.porch_counter=self.porch/self.tick
if self.transition=="cut":
# just keep displaying the slide full brightness.
# No need for porch but used for symmetry
pass
elif self.transition=="fade":
#experimental start full and decrease brightness (controlled by porch_counter).
self._display_image()
elif self.transition== "slide":
#experimental, start in middle and move to right (controlled by porch_counter)
if self.pil_image<>None:
self.tk_img=PIL.ImageTk.PhotoImage(self.pil_image)
self.drawn = self.canvas.create_image(self.centre_x, self.centre_y,
image=self.tk_img, anchor=CENTER)
elif self.transition =="crop":
#experimental, start in middle and crop from right (controlled by porch_counter)
if self.pil_image<>None:
self.tk_img=PIL.ImageTk.PhotoImage(self.pil_image)
self.drawn = self.canvas.create_image(self.centre_x, self.centre_y,
image=self.tk_img, anchor=CENTER)
self._tick_timer=self.canvas.after(self.tick, self._do_back_porch)
def _do_back_porch(self):
if self.quit_signal == True:
self._end('normal','user quit')
else:
self.porch_counter=self.porch_counter-1
self._display_image()
if self.porch_counter==0:
self._end('normal','finished')
else:
self._tick_timer=self.canvas.after(self.tick,self._do_back_porch)
def _display_image(self):
if self.transition=="cut":
pass
# all the methods below have incorrect code !!!
elif self.transition=="fade":
if self.pil_image<>None:
self.enh=PIL.ImageEnhance.Brightness(self.pil_image)
prop=float(self.porch_counter)/float(20) #????????
self.pil_img=self.enh.enhance(prop)
self.tk_img=PIL.ImageTk.PhotoImage(self.pil_img)
self.drawn = self.canvas.create_image(self.centre_x, self.centre_y,
image=self.tk_img, anchor=CENTER)
elif self.transition=="slide":
if self.pil_image<>None:
self.canvas.move(self.drawn,5,0)
elif self.transition=="crop":
if self.pil_image<>None:
self.crop= 10*self.porch_counter
self.pil_img=self.pil_image.crop((0,0,1000-self.crop,1080))
self.tk_img=PIL.ImageTk.PhotoImage(self.pil_img)
self.drawn = self.canvas.create_image(self.centre_x, self.centre_y,
image=self.tk_img, anchor=CENTER)
# display message if image is not available
if self.pil_image== None:
self.canvas.create_text(self.centre_x, self.centre_y,
text=self.resource('imageplayer','m02'),
fill='white',
font='arial 30 bold')
# display instructions if enabled
if self.enable_menu== True:
self.canvas.create_text(self.centre_x, int(self.canvas['height']) - int(self.cd['hint-y']),
text=self.cd['hint-text'],
fill=self.cd['hint-colour'],
font=self.cd['hint-font'])
# display show text if enabled
if self.cd['show-text']<> '':
self.canvas.create_text(int(self.cd['show-text-x']),int(self.cd['show-text-y']),
anchor=NW,
text=self.cd['show-text'],
fill=self.cd['show-text-colour'],
font=self.cd['show-text-font'])
# display track text if enabled
if self.track_params['track-text']<> '':
self.canvas.create_text(int(self.track_params['track-text-x']),int(self.track_params['track-text-y']),
anchor=NW,
text=self.track_params['track-text'],
fill=self.track_params['track-text-colour'],
font=self.track_params['track-text-font'])
self.canvas.update_idletasks( )