VolumeHandControl.py

import cv2 as cv
import numpy as np
import time
import math
import HandTrackingModule as htm

from ctypes import cast, POINTER
from comtypes import CLSCTX_ALL
from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume

#############

wCam, hCam = 640, 480

#############

cap = cv.VideoCapture(0)
cap.set(3, wCam)
cap.set(4, hCam)
pTime = 0  # previous Time

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()
volRange = volume.GetVolumeRange()
minVol = volRange[0]
maxVol = volRange[1]
vol = 0
volBar = 400
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  # To get the center of the line

        cv.circle(img, (x1, y1), 15, (255, 0, 255), cv.FILLED)
        cv.circle(img, (x2, y2), 15, (255, 0, 255), cv.FILLED)
        cv.line(img, (x1, y1), (x2, y2), (255, 0, 255), 2)
        cv.circle(img, (cx, cy), 10, (255, 0, 255), cv.FILLED)

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

        # Hand range 20 to 200
        # Volume Range -65 to 0

        vol = np.interp(length, [20, 200], [minVol, maxVol])
        volBar = np.interp(length, [20, 200], [400, 150])
        volPer = np.interp(length, [20, 200], [0, 100])

        print(int(length), vol)
        volume.SetMasterVolumeLevel(vol, None)

        if length < 50:
            cv.circle(img, (cx, cy), 10, (0, 255, 0), cv.FILLED)

    cv.rectangle(img, (50, 150), (85, 400), (0, 255, 0), 3)
    cv.rectangle(img, (50, int(volBar)), (85, 400), (0, 255, 0), cv.FILLED)
    cv.putText(img, f'FPS: {int(volPer)} %', (40, 450), cv.FONT_HERSHEY_COMPLEX, 1, (250, 0, 0), 3)

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

    cv.putText(img, f'FPS: {int(fps)}', (40, 50), cv.FONT_HERSHEY_COMPLEX, 2, (255, 0, 0), 3)

    cv.imshow("Image", img)
    if cv.waitKey(1) & 0xFF == ord('q'):
        break