355 lines
10 KiB
Python
355 lines
10 KiB
Python
import logging
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import os.path
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from typing import Any
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from time import sleep
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from enum import Enum, auto
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from subprocess import call
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from pizzactrl import fs_names, sb_dummy
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from pizzactrl.hal import ScrollSensor
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from .storyboard import Activity, Select, Option
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from .hal_serial import SerialCommunicationError, PizzaHAL, play_sound, take_photo, record_video, record_sound, turn_off, wait_for_input, \
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light, move, rewind
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from pizzactrl import storyboard
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logger = logging.getLogger(__name__)
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class State(Enum):
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POWER_ON = auto()
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POST = auto()
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IDLE_START = auto()
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PLAY = auto()
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PAUSE = auto()
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REWIND = auto()
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IDLE_END = auto()
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SHUTDOWN = auto()
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ERROR = -1
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class Language(Enum):
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NOT_SET = auto()
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DE = auto()
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EN = auto()
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def load_sounds():
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"""
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Load all prerecorded Sounds from the cache
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:returns a list of sound file names
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"""
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soundcache = [
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fs_names.SFX_SHUTTER,
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fs_names.SFX_ERROR,
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fs_names.SFX_POST_OK,
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fs_names.SND_SELECT_LANG
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]
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return soundcache
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# Map Activities to function calls
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ACTIVITY_SELECTOR = {
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Activity.PLAY_SOUND: play_sound,
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Activity.RECORD_SOUND: record_sound,
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Activity.RECORD_VIDEO: record_video,
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Activity.TAKE_PHOTO: take_photo,
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Activity.LIGHT_LAYER: light,
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Activity.LIGHT_BACK: light,
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Activity.ADVANCE_UP: move,
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Activity.ADVANCE_LEFT: move
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}
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class Statemachine:
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def __init__(self,
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story_de: Any=None,
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story_en: Any=None,
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move: bool = False,
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loop: bool = True,
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test: bool = False):
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self.state = State.POWER_ON
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self.hal = PizzaHAL()
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self.chapter = 0
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self.next_chapter = 0
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self.story = None
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self.story_de = story_de
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self.story_en = story_en
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self.lang = Language.NOT_SET
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self.MOVE = move # self.move is reset to this value
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self.move = self.MOVE
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self.test = test
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self.loop = loop
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def run(self):
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logger.debug(f'Run(state={self.state})')
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choice = {
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State.POWER_ON: self._power_on,
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State.POST: self._post,
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State.IDLE_START: self._idle_start,
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State.PLAY: self._play,
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State.REWIND: self._rewind,
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State.IDLE_END: self._idle_end
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}
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while (self.state is not State.ERROR) and \
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(self.state is not State.SHUTDOWN):
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choice[self.state]()
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if self.state is State.ERROR:
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logger.debug('An error occurred. Trying to notify user...')
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if self.lang is Language.DE:
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play_sound(self.hal, fs_names.SFX_ERROR_DE)
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elif self.lang is Language.EN:
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play_sound(self.hal, fs_names.SFX_ERROR_EN)
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else:
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play_sound(self.hal, fs_names.SFX_ERROR)
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self._shutdown()
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def _lang_de(self, **kwargs):
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logger.info(f'select language german')
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self.lang = Language.DE
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self.story = self.story_de
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def _lang_en(self, **kwargs):
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logger.info(f'select language english')
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self.lang = Language.EN
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self.story = self.story_en
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def _power_on(self):
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"""
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Initialize hal callbacks, load sounds
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"""
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logger.debug(f'power on')
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# TODO enable lid sensor
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# self.hal.lid_sensor.when_pressed = self._lid_open
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# self.hal.lid_sensor.when_released = self._lid_closed
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self.hal.init_sounds(load_sounds())
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self.hal.init_camera()
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self.state = State.POST
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def _post(self):
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"""
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Power on self test.
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"""
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logger.debug(f'post')
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if (not self.test) and (not os.path.exists(fs_names.USB_STICK)):
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logger.warning('USB-Stick not found.')
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self.state = State.ERROR
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return
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# TODO set RPi_HELO pins, wait for response
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# Callback for start when blue button is held
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# self.hal.btn_start.when_activated = self._start_or_rewind
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# logger.debug('start button callback activated')
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try:
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self.hal.init_connection()
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except SerialCommunicationError as e:
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self.state = State.ERROR
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logger.exception(e)
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return
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# play a sound if everything is alright
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play_sound(self.hal, fs_names.SFX_POST_OK)
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if self.test:
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self.state = State.PLAY
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logger.debug('play')
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else:
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self.state = State.IDLE_START
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logger.debug('idle_start')
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def _idle_start(self):
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"""
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Device is armed. Wait for user to press start button
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"""
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pass
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def _play(self):
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"""
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Select language, then run the storyboard
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"""
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logger.debug(f'play')
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if self.test:
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self.story = sb_dummy.STORYBOARD
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else:
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# TODO reenable language selection
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self.story = self.story_en
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while self.chapter is not None:
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self._play_chapter()
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self._advance_chapter()
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self.state = State.REWIND
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def _option_callback(self, selection: Select):
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"""
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Return a callback for the appropriate option and parameters.
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Callbacks set the properties of `Statemachine` to determine it's behaviour.
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"""
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rewind = selection.values.get('rewind', Option.REPEAT.value['rewind'])
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next_chapter = selection.values.get('chapter', Option.GOTO.value['chapter'])
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shutdown = selection.values.get('shutdown', Option.QUIT.value['shutdown'])
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def _continue(**kwargs):
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"""
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Continue in the Storyboard. Prepare advancing to the next chapter.
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"""
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self.move = self.MOVE
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if len(self.story) > (self.chapter + 1):
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self.next_chapter = self.chapter + 1
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else:
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self.next_chapter = None
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def _repeat(**kwargs):
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"""
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Repeat the current chapter. Do not rewind if the selection says so.
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"""
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self.move = rewind
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self.next_chapter = self.chapter
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def _goto(**kwargs):
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"""
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Jump to a specified chapter.
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"""
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self.move = self.MOVE
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self.next_chapter = next_chapter
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def _quit(**kwargs):
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self.move = self.MOVE
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self.loop = not shutdown
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self.next_chapter = None
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return {
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Option.CONTINUE: _continue,
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Option.REPEAT: _repeat,
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Option.GOTO: _goto,
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Option.QUIT: _quit,
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None: None
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}[selection.option]
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def _play_chapter(self):
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"""
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Play the chapter specified by self.chapter
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"""
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logger.debug(f'playing chapter {self.chapter}')
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if self.chapter < len(self.story):
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chapter = self.story[self.chapter]
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while chapter.hasnext():
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act = next(chapter)
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logger.debug(f'next activity {act.activity}')
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if act.activity is Activity.WAIT_FOR_INPUT:
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wait_for_input(hal=self.hal,
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blue_cb = self._option_callback(act.values['on_blue']),
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red_cb = self._option_callback(act.values['on_red']),
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yellow_cb = self._option_callback(act.values['on_yellow']),
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green_cb = self._option_callback(act.values['on_green']),
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timeout_cb = self._option_callback(act.values['on_timeout']),
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**act.values)
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else:
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try:
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ACTIVITY_SELECTOR[act.activity](self.hal, **act.values)
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except KeyError:
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logger.exception('Caught KeyError, ignoring...')
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pass
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self.next_chapter = self.chapter + 1
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else:
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self.next_chapter = None
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def _advance_chapter(self):
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"""
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Update chapters and move the scrolls.
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Update self.chapter to self.next_chapter
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"""
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if self.next_chapter is not None:
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diff = self.next_chapter - self.chapter
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h_steps = 0
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v_steps = 0
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if diff < 0:
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"""
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Rewind all chapters up to target
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"""
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for ch in self.story[self.next_chapter:self.chapter]:
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steps = ch.rewind()
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h_steps += steps['h_steps']
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v_steps += steps['v_steps']
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elif diff > 0:
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"""
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Skip all chapters up to target
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"""
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for ch in self.story[self.chapter:self.next_chapter]:
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steps = ch.skip()
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h_steps += steps['h_steps']
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v_steps += steps['v_steps']
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else:
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"""
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Rewind current chapter
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"""
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steps = self.story[self.chapter].rewind()
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h_steps = steps['h_steps']
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v_steps = steps['v_steps']
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if self.move:
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move(self.hal, h_steps, True)
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move(self.hal, v_steps, False)
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self.chapter = self.next_chapter
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def _rewind(self):
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"""
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Rewind all scrolls, post-process videos
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"""
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# TODO postprocessing - add sound
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logger.debug('Converting video...')
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cmdstring = f'MP4Box -add {fs_names.REC_DRAW_CITY} {fs_names.REC_MERGED_VIDEO}'
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call([cmdstring], shell=True)
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logger.debug('Rewinding...')
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if self.move:
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rewind(self.hal)
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for chapter in self.story:
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chapter.rewind()
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if self.loop:
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self.state = State.IDLE_START
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else:
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self.state = State.IDLE_END
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def _idle_end(self):
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"""
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Initialize shutdown
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"""
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self.state = State.SHUTDOWN
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def _shutdown(self):
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"""
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Clean up, end execution
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"""
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logger.debug('shutdown')
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turn_off(self.hal)
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del self.hal
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