lib: add aiohttp, base64 and binascii

draft_code/webcam_snippets.py

@@ -0,0 +1,77 @@
+try:
+    from camera import Camera, GrabMode, PixelFormat, FrameSize, GainCeiling
+    cam = Camera(
+        data_pins=[12,13,15,11,14,10,7,2],
+        vsync_pin=6,
+        href_pin=4,
+        sda_pin=21,
+        scl_pin=16,
+        pclk_pin=9,
+        xclk_pin=8,
+        xclk_freq=20000000,
+        powerdown_pin=-1,
+        reset_pin=-1,
+        #pixel_format=PixelFormat.RGB565,
+        pixel_format=PixelFormat.GRAYSCALE,
+        frame_size=FrameSize.R240X240,
+        grab_mode=GrabMode.LATEST 
+    )
+    print("it worked!")
+except Exception as e:
+    print(f"Exception: {e}")
+
+
+
+images=300
+
+import webcam
+import time
+
+
+class Webcam:
+    def __init__(self):
+        # webcam.init() returns (obj, capture_grayscale, deinit)
+        self.obj, self._capture_grayscale, self._deinit = webcam.init()
+    def capture_grayscale(self):
+        return self._capture_grayscale(self.obj)
+    def deinit(self):
+        return self._deinit(self.obj)
+
+starttime = time.ticks_ms()
+
+# Usage
+cam = Webcam()
+for _ in range(images):
+    buf = cam.capture_grayscale()
+    print(len(buf))  # Should print 57600 (240 * 240)
+
+endtime = time.ticks_ms()
+
+print(f"duration: {endtime-starttime}ms")
+
+
+cam.deinit()
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+#from webcam import Webcam, init, capture_frame, deinit
+import webcam
+
+cam = webcam.init("/dev/video0")  # Initialize webcam with device path
+for i in range(1000):
+    buf = webcam.capture_frame(cam)  # Captures frame, returns 240x240 grayscale buffer
+    print(f"buffer {i} has length {len(buf)}")  # Prints 57600
+webcam.deinit(cam)  # Deinitializes webcam
+
+