add camera driver (#191)

* add camera driver

* add init.py file to cameraSII driver

unilabos/devices/cameraSII/cameraUSB_test.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+import time
+import json
+
+from cameraUSB import CameraController
+
+
+def main():
+    # 按你的实际情况改
+    cfg = dict(
+        host_id="demo-host",
+        signal_backend_url="wss://sciol.ac.cn/api/realtime/signal/host",
+        rtmp_url="rtmp://srs.sciol.ac.cn:4499/live/camera-01",
+        webrtc_api="https://srs.sciol.ac.cn/rtc/v1/play/",
+        webrtc_stream_url="webrtc://srs.sciol.ac.cn:4500/live/camera-01",
+        video_device="/dev/video7",
+        width=1280,
+        height=720,
+        fps=30,
+        video_bitrate="1500k",
+        audio_device=None,
+    )
+
+    c = CameraController(**cfg)
+
+    # 可选：如果你不想依赖 __init__ 自动 start，可以这样显式调用：
+    # c = CameraController(host_id=cfg["host_id"])
+    # c.start(cfg)
+
+    run_seconds = 30  # 测试运行时长
+    t0 = time.time()
+
+    try:
+        while True:
+            st = c.get_status()
+            print(json.dumps(st, ensure_ascii=False, indent=2))
+
+            if time.time() - t0 >= run_seconds:
+                break
+
+            time.sleep(2)
+    except KeyboardInterrupt:
+        print("Interrupted, stopping...")
+    finally:
+        print("Stopping controller...")
+        c.stop()
+        print("Done.")
+
+
+if __name__ == "__main__":
+    main()