handtracking_control_volume.py

import cv2
import time
import numpy as np
import Handtracking_module as htm
import math
from ctypes import cast, POINTER
from comtypes import CLSCTX_ALL
from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume

#################################
wCam, hCam = 800, 600
#################################
cap = cv2.VideoCapture(0)
cap.set(3, wCam)
cap.set(4, hCam)
pTime = 0
cTime = 0
detector = htm.handDetector(detectionCon=0.7)

devices = AudioUtilities.GetSpeakers()
interface = devices.Activate(
            IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
volume = cast(interface, POINTER(IAudioEndpointVolume))
#volume.GetMute()
#volume.GetMasterVolumeLevel()
volumeRange=volume.GetVolumeRange()
minVol = volumeRange[0]
maxVol = volumeRange[1]
volBar = 400
vol = 0
volPer = 0

while True:
    success, img = cap.read()
    img = detector.findHands(img)
    lmList = detector.findPosition(img, draw=False)
    if len(lmList) != 0:
        #print(lmList[4], lmList[8])

        x1, y1 = lmList[4][1], lmList[4][2]
        x2, y2 = lmList[8][1], lmList[8][2]
        cx, cy = (x1 + x2) // 2, (y1+y2) // 2

        cv2.circle(img, (x1, y1), 7, (255, 0, 255), cv2.FILLED)
        cv2.circle(img, (x2, y2), 7, (255, 0, 255), cv2.FILLED)
        cv2.line(img, (x1, y1), (x2, y2), (255, 0, 255), 3)
        cv2.circle(img, (cx, cy), 7, (255, 0, 255), cv2.FILLED)

        length = math.hypot(x2-x1,y2-y1)
        #print(length)

        #Hand range 50 - 300
        #volume -65 - 0
        vol = np.interp(length,[50,250],[minVol,maxVol])
        volBar = np.interp(length,[50,250],[400,150])
        volPer = np.interp(length,[50,250],[0,100])
        print(int(length) ,vol)
        volume.SetMasterVolumeLevel(vol, None)
        if length<50:
             cv2.circle(img, (cx, cy), 7, (0, 255, 0), cv2.FILLED)
    
    cv2.rectangle(img,(50,150),(85,400),(0,255,0),3)
    cv2.rectangle(img,(50,int(volBar)),(85,400),(0,255,0),cv2.FILLED)
    cv2.putText(img, f'{int(volPer)}%' , (40, 450),
                cv2.FONT_HERSHEY_COMPLEX, 1, (255, 0, 255), 3)

    cTime = time.time()
    fps = 1 / (cTime - pTime)
    pTime = cTime

    cv2.putText(img, str(int(fps)), (10, 50),
                cv2.FONT_HERSHEY_PLAIN, 2, (255, 0, 255), 3)
    cv2.imshow("img", img)
    cv2.waitKey(1)

    # làm ơn cài đúng phiên bản pip install mediapipe==0.8.7.1