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service.py
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service.py
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"""
@author Pengnan Fan
@date Jul 13, 2020
This is a helping file storing service triggered by interaction with UI
"""
import os
import os.path as osp
import cv2
import pandas as pd
from pandas import DataFrame as df
class Service:
def __init__(self, ui):
self.ui = ui
self.dataset_path = None
self.store_path = None
self.fps = 5
self.videoLists = list()
self.currVideo = None
self.cap = None
self.totFrame = 0
self.currFrame = 0
self.labelStart = 0
self.labelEnd = 0
self.type = None
self.actionType = "tripping"
def updateInputInfo(self, data_path, store_path):
if osp.exists(data_path):
self.dataset_path = data_path
self.ui.updateMessage("Dataset path is updated")
else:
self.ui.updateError("Invalid dataset path: {}".format(data_path))
return
if osp.exists(store_path):
self.store_path = store_path
self.ui.updateMessage("Store path is updated")
else:
self.ui.updateError("Invalid store path: {}".format(store_path))
self.updateVideoLists()
def getSelectedVideo(self, evt):
return evt.GetString()
def updateVideoLists(self):
if osp.exists(self.dataset_path):
self.videoLists = sorted(list(filter(lambda x: x[-4:] in ['.avi', '.wav', '.mp4'], os.listdir(self.dataset_path))))
self.ui.selectVideo.SetItems(self.videoLists)
else:
self.ui.updateError("Please enter a valid dataset path.")
def loadVideo(self):
totVideo = len(self.videoLists)
self.currVideo = totVideo if self.currVideo > totVideo else self.currVideo
self.currVideo = 0 if self.currVideo < 0 else self.currVideo
self.ui.selectVideo.Selection = self.currVideo
self.cap = cv2.VideoCapture(osp.join(self.dataset_path, self.videoLists[self.currVideo]))
self.totFrame = int(self.cap.get(7))
self.currFrame = 0
self.labelStart = 0
self.labelEnd = 0
self.ui.updateStartLabel(0)
self.ui.updateEndLabel(0)
self.type = None
self.ui.videoFrame.SetLabel("0")
self.updateFrameN()
self.ui.updateMessage("Select video: {}".format(self.videoLists[self.currVideo]))
def updateFrameN(self):
if self.cap:
self.currFrame = self.totFrame if self.currFrame > self.totFrame else self.currFrame
self.currFrame = 0 if self.currFrame < 0 else self.currFrame
self.cap.set(cv2.CAP_PROP_POS_FRAMES, self.currFrame)
ret, frame = self.cap.read()
if ret:
self.ui.updateFrame(cv2.cvtColor(frame, cv2.COLOR_BGR2RGB), self.currFrame)
else:
self.ui.updateError("This is an empty video: {}".format(self.currVideo))
def button_event(self, e, evt_id):
# print(evt_id)
if evt_id == "prevVideo":
self.currVideo -= 1
self.loadVideo()
elif evt_id == "prevNFrame":
self.currFrame -= self.fps
self.updateFrameN()
elif evt_id == "prevFrame":
self.currFrame -= 1
self.updateFrameN()
elif evt_id == "start":
self.ui.updateMessage("Select start")
elif evt_id == "end":
self.ui.updateMessage("Select end")
elif evt_id == "nextFrame":
self.currFrame += 1
self.updateFrameN()
elif evt_id == "nextNFrame":
self.currFrame += self.fps
self.updateFrameN()
elif evt_id == "nextVideo":
self.currVideo += 1
self.loadVideo()
elif evt_id == "confirm_input":
self.updateInputInfo(self.ui.datasetInput.GetValue(), self.ui.storeInput.GetValue())
elif evt_id == "selectStart":
self.labelStart = self.currFrame
self.ui.updateStartLabel(int(self.currFrame))
self.ui.updateMessage("Select frame {} as start of labeling".format(self.currFrame))
elif evt_id == "selectEnd":
self.labelEnd = self.currFrame
self.ui.updateEndLabel(int(self.currFrame))
self.ui.updateMessage("Select frame {} as end of labeling".format(self.currFrame))
elif evt_id == "selectVideo":
self.currVideo = self.ui.selectVideo.Selection
self.loadVideo()
elif evt_id == "selectClose":
self.storeLabel("close")
elif evt_id == "selectMid":
self.storeLabel("mid")
elif evt_id == "selectFar":
self.storeLabel("far")
elif evt_id == "saveLabel":
self.saveLabel()
elif evt_id == "selectAction":
self.actionType = e.GetString()
self.ui.updateMessage("Action Type: {} is selected.".format(self.actionType))
else:
self.ui.updateError("Unsupported Button")
self.ui.Refresh()
def updateFPS(self, fps):
self.fps = fps
self.ui.updateMessage("FPS is updated as: {}".format(fps))
def menu_event(self, event):
id = event.GetId()
if id == 11:
self.updateFPS(5)
elif id == 12:
self.updateFPS(10)
elif id == 13:
self.updateFPS(15)
elif id == 14:
self.updateFPS(20)
elif id == 15:
self.updateFPS(30)
else:
raise NotImplemented
def readLabel(self):
if self.labelStart < self.labelEnd:
label = df({"video":[self.videoLists[self.currVideo]],"start_frame":[self.labelStart],"end_frame":[self.labelEnd],"type":[self.type],"action":[self.actionType]})
msg = "{} action [{}, {}] is recorded".format(self.actionType.upper(), self.labelStart, self.labelEnd)
if self.type:
msg += " as {} shot".format(self.type)
self.ui.updateMessage(msg)
return label
else:
self.ui.updateError("Action [{},{}] is NOT recorded: start should be less than end".format(self.labelStart, self.labelEnd))
return None
def storeLabel(self, type=None):
self.type = type
self.ui.updateMessage("Action type is selected as {}".format(type))
def saveLabel(self):
label = self.readLabel()
if label is not None:
result_path = osp.join(self.store_path, osp.basename(self.dataset_path).replace(" ", "_")+"_labels.csv")
if osp.exists(result_path):
old_data = pd.read_csv(result_path)
label = pd.concat([old_data, label], axis=0, sort=False)
label.to_csv(result_path, index=False)
else:
self.ui.updateError("No action selected")