Added support for picking directshow device capability lines.
This commit is contained in:
Emiliana
parent
8ff2e61e1b
commit
c9af5913fa
5 changed files with 104 additions and 33 deletions
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@ -5,6 +5,7 @@ import numpy as np
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from ctypes import *
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from PIL import Image
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import cv2
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import json
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def resolve(name):
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f = os.path.join(os.path.dirname(__file__), name)
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@ -13,7 +14,7 @@ def resolve(name):
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lib = None
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def create_frame_buffer(width, height):
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buffer = bytearray(width * height * 4)
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buffer = bytearray(width * height * 4 * 4)
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char_array = c_char * len(buffer)
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return char_array.from_buffer(buffer)
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@ -31,16 +32,20 @@ class DShowCapture():
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lib.get_devices.argtypes = [c_void_p]
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lib.get_device.argtypes = [c_void_p, c_int, c_char_p, c_int]
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lib.capture_device.argtypes = [c_void_p, c_int, c_int, c_int, c_int]
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lib.capture_device_by_dcap.argtypes = [c_void_p, c_int, c_int, c_int, c_int, c_longlong]
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lib.capture_device_default.argtypes = [c_void_p, c_int]
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lib.get_width.argtypes = [c_void_p]
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lib.get_height.argtypes = [c_void_p]
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lib.get_fps.argtypes = [c_void_p]
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lib.get_flipped.argtypes = [c_void_p]
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lib.get_colorspace.argtypes = [c_void_p]
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lib.get_colorspace_internal.argtypes = [c_void_p]
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lib.capturing.argtypes = [c_void_p]
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lib.get_frame.argtypes = [c_void_p, c_int, c_char_p, c_int]
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lib.get_size.argtypes = [c_void_p]
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lib.stop_capture.argtypes = [c_void_p]
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lib.get_json_length.argtypes = [c_void_p]
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lib.get_json.argtypes = [c_void_p, c_char_p, c_int]
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lib.destroy_capture.argtypes = [c_void_p]
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self.lib = lib
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self.cap = lib.create_capture()
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@ -49,6 +54,7 @@ class DShowCapture():
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self.have_devices = False
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self.size = None
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self.real_size = None
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self.info = None
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def __del__(self):
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if not self.buffer is None:
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@ -65,6 +71,14 @@ class DShowCapture():
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name_str = str(self.name_buffer.value.decode('utf8'))
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return name_str
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def get_info(self):
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json_length = self.lib.get_json_length(self.cap);
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json_buffer = create_string_buffer(json_length)
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self.lib.get_json(self.cap, json_buffer, json_length);
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json_text = str(json_buffer.value.decode('utf8'))
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self.info = json.loads(json_text)
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return self.info
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def capture_device(self, cam, width, height, fps):
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if not self.have_devices:
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self.get_devices()
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@ -81,6 +95,23 @@ class DShowCapture():
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self.real_size = None
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return ret;
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def capture_device_by_dcap(self, cam, dcap, width, height, fps):
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if not self.have_devices:
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self.get_devices()
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fps = int(10000000 / fps)
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ret = self.lib.capture_device_by_dcap(self.cap, cam, dcap, width, height, fps) == 1
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if ret:
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self.width = self.get_width()
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self.height = self.get_height()
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self.flipped = self.get_flipped()
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self.colorspace = self.get_colorspace()
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self.size = self.width * self.height * 4 * 4
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self.buffer = create_frame_buffer(self.width, self.height)
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else:
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self.size = None
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self.real_size = None
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return ret;
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def capture_device_default(self, cam):
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if not self.have_devices:
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self.get_devices()
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@ -90,7 +121,7 @@ class DShowCapture():
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self.height = self.get_height()
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self.flipped = self.get_flipped()
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self.colorspace = self.get_colorspace()
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self.size = self.width * self.height * 4
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self.size = self.width * self.height * 4 * 4
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self.buffer = create_frame_buffer(self.width, self.height)
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else:
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self.size = None
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@ -110,7 +141,13 @@ class DShowCapture():
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return self.lib.get_flipped(self.cap) != 0
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def get_colorspace(self):
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return self.lib.get_colorspace(self.cap)
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colorspace = self.lib.get_colorspace(self.cap)
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if colorspace == 0:
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colorspace = self.lib.get_colorspace_internal(self.cap)
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return colorspace
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def get_colorspace_internal(self):
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return self.lib.get_colorspace_internal(self.cap)
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def capturing(self):
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return self.lib.capturing(self.cap) == 1
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@ -118,32 +155,36 @@ class DShowCapture():
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def get_frame(self, timeout):
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if self.size is None:
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return None
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if self.lib.get_frame(self.cap, timeout, self.buffer, self.size) == 0:
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return None
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if self.real_size is None:
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self.real_size = self.lib.get_size(self.cap)
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self.real_size = self.lib.get_frame(self.cap, timeout, self.buffer, self.size)
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img = np.frombuffer(self.buffer, dtype=np.uint8)[0:self.real_size]
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if self.colorspace in [100, 101]:
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img = cv2.cvtColor(img.reshape((self.height,self.width,4)), cv2.COLOR_BGRA2BGR);
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if self.real_size == self.height * self.width * 4:
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img = cv2.cvtColor(img.reshape((self.height,self.width,4)), cv2.COLOR_BGRA2BGR)
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elif self.real_size == self.height * self.width * 3:
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img = img.reshape((self.height,self.width,3))
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else:
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return None
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if not self.flipped:
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img = cv2.flip(img, 0)
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return img
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elif self.colorspace == 200:
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img = cv2.cvtColor(img.reshape((3 * self.height // 2,self.width,1)), cv2.COLOR_YUV2BGR_I420);
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img = cv2.cvtColor(img.reshape((3 * self.height // 2,self.width,1)), cv2.COLOR_YUV2BGR_I420)
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elif self.colorspace == 201:
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img = cv2.cvtColor(img.reshape((3 * self.height // 2,self.width,1)), cv2.COLOR_YUV2BGR_NV12);
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img = cv2.cvtColor(img.reshape((3 * self.height // 2,self.width,1)), cv2.COLOR_YUV2BGR_NV12)
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elif self.colorspace == 202:
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img = cv2.cvtColor(img.reshape((3 * self.height // 2,self.width,1)), cv2.COLOR_YUV2BGR_YV12);
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img = cv2.cvtColor(img.reshape((3 * self.height // 2,self.width,1)), cv2.COLOR_YUV2BGR_YV12)
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elif self.colorspace == 203:
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img = cv2.cvtColor(img.reshape((self.height,self.width,1)), cv2.COLOR_GRAY2BGR);
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img = cv2.cvtColor(img.reshape((self.height,self.width,1)), cv2.COLOR_GRAY2BGR)
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elif self.colorspace == 300:
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img = cv2.cvtColor(img.reshape((self.height,self.width,2)), cv2.COLOR_YUV2BGR_YVYU);
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img = cv2.cvtColor(img.reshape((self.height,self.width,2)), cv2.COLOR_YUV2BGR_YVYU)
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elif self.colorspace == 301:
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img = cv2.cvtColor(img.reshape((self.height,self.width,2)), cv2.COLOR_YUV2BGR_YUY2);
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img = cv2.cvtColor(img.reshape((self.height,self.width,2)), cv2.COLOR_YUV2BGR_YUY2)
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elif self.colorspace == 302:
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img = cv2.cvtColor(img.reshape((self.height,self.width,2)), cv2.COLOR_YUV2BGR_UYVY);
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img = cv2.cvtColor(img.reshape((self.height,self.width,2)), cv2.COLOR_YUV2BGR_UYVY)
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elif self.colorspace == 303:
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return None
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elif self.colorspace == 400:
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img = cv2.imdecode(img, cv2.IMREAD_COLOR);
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if self.flipped:
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img = cv2.flip(img, 0)
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return img
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@ -186,7 +227,7 @@ if __name__ == "__main__":
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width = cap.get_width()
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height = cap.get_height()
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flipped = cap.get_flipped()
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print(f"Width: {width} Height: {height} FPS: {cap.get_fps()} Flipped: {flipped} Colorspace: {cap.get_colorspace()}")
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print(f"Width: {width} Height: {height} FPS: {cap.get_fps()} Flipped: {flipped} Colorspace: {cap.get_colorspace()} Internal: {cap.get_colorspace_internal()}")
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while True:
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img = cap.get_frame(1000)
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