class Preprocess():
def __init__(self, stream_name, channel, resize_width, resize_height):
self._stream_name = str(stream_name)
self._channel = int(channel)
self._resize_width = resize_width
self._resize_height = resize_width
self._status = STATUS_PREPROC_INIT
self._display = False
self._dvpp = None
self._cap = None
self._context = None
self._image_queue = queue.Queue(64)
def _start(self):
thread_id, ret = acl.util.start_thread(self._thread_entry, [])
utils.check_ret("acl.util.start_thread", ret)
log_info("Start sub thread ok, wait init...")
while self._status == STATUS_PREPROC_INIT:
time.sleep(0.001)
log_info("Status changed to ", self._status)
while self._start == STATUS_PREPROC_RUNNING:
if self._image_queue.qsize() > 0:
break
time.sleep(0.001)
return self._status != STATUS_PREPROC_ERROR
def _thread_entry(self, args_list):
self._context, ret = acl.rt.create_context(0)
utils.check_ret("acl.rt.create_context", ret)
self._cap = video.AclVideo(self._stream_name)
self._dvpp = Dvpp()
self._status = STATUS_PREPROC_RUNNING
frame_cnt = 0
while self._status == STATUS_PREPROC_RUNNING:
ret, image = self._cap.read()
if ret or (image is None):
if ret == const.VIDEO_DECODE_FINISH:
log_info("Video %s decode finish"%(self._stream_name))
self._status = STATUS_PREPROC_EXIT
else:
log_info("Video %s decode failed"%(self._stream_name))
self._status = STATUS_PREPROC_ERROR
break
if (int(frame_cnt) % 5 == 0):
self._process_frame(image)
time.sleep(0.0)
self._thread_exit()
def _process_frame(self, frame):
resized_image = self._dvpp.resize(frame, self._resize_width,
self._resize_height)
if resized_image is None:
log_error("dvpp resize image failed")
return
jpg_image = None
if self._display:
jpg_image = self._dvpp.jpege(frame)
if jpg_image is None:
log_error("dvpp jpege failed")
return
data = PreProcData(self._channel, frame.width, frame.height,
resized_image, jpg_image, self._display)
self._image_queue.put(data)
def _thread_exit(self):
self._status = STATUS_PREPROC_EXIT
log_info("Channel %d thread exit..."%(self._channel))
if self._dvpp != None:
del self._dvpp
self._dvpp = None
if self._cap != None:
del self._cap
self._cap = None
if self._context != None:
acl.rt.destroy_context(self._context)
self._context = None
log_info("Channel %d thread exit ok"%(self._channel))
def set_display(self, display):
self._display = display
def is_finished(self):
return self._status > STATUS_PREPROC_RUNNING
def get_data(self):
ret = True
if self._status == STATUS_PREPROC_EXIT:
return False, None
elif self._status == STATUS_PREPROC_INIT:
ret = self._start()
if ret == False:
log_error("decode channel %d failed"%(self._channel))
return False, None
if self._image_queue.empty():
return True, None
preproc_data = self._image_queue.get_nowait()
if preproc_data is None:
ret = False
return ret, preproc_data
def __del__(self):
self._thread_exit()
class VggSsd(object):
"""vggssd"""
def __init__(self, acl_resource, model_width, model_height):
self._acl_resource = acl_resource
self._model_width = model_width
self._model_height = model_height
#Use dvpp to process images, when using opencv or PIL,
# you don't need to create a dvpp instance
self._dvpp = Dvpp(acl_resource)
def __del__(self):
if self._dvpp:
del self._dvpp
print("Release yolov3 resource finished")
def pre_process(self, image):
"""Use dvpp to scale the image to the required size of the model"""
resized_image = self._dvpp.resize(image, self._model_width,
self._model_height)
if resized_image is None:
print("Resize image failed")
return None
#Output the scaled image and image information as inference input data
return [
resized_image,
]
def post_process(self, infer_output, origin_img):
"""Analyze inference output data"""
detection_result_list = self._analyze_inference_output(
infer_output, origin_img)
#Convert yuv image to jpeg image
jpeg_image = self._dvpp.jpege(origin_img)
return jpeg_image, detection_result_list
def _analyze_inference_output(self, infer_output, origin_img):
#vgg ssd has two outputs, the first output
# infer_output[0] is the number of detected objects, and the shape is (1,8)
box_num = int(infer_output[0][0, 0])
#The second output infer_output[1] is the detected object information, the shape is (1, 200, 8)
box_info = infer_output[1][0]
detection_result_list = []
for i in range(box_num):
#Detected object confidence
score = box_info[i, SCORE]
if score < 0.9:
break
detection_item = presenter_datatype.ObjectDetectionResult()
detection_item.confidence = score
#Person face position frame coordinates, normalized coordinates,
# need to be multiplied by the width and height of the picture to convert to the coordinates on the picture
detection_item.box.lt.x = int(box_info[i, TOP_LEFT_X] *
origin_img.width)
detection_item.box.lt.y = int(box_info[i, TOP_LEFT_Y] *
origin_img.height)
detection_item.box.rb.x = int(box_info[i, BOTTOM_RIGHT_X] *
origin_img.width)
detection_item.box.rb.y = int(box_info[i, BOTTOM_RIGHT_Y] *
origin_img.height)
#Organize the confidence into a string
detection_item.result_text = str(
round(detection_item.confidence * 100, 2)) + "%"
detection_result_list.append(detection_item)
return detection_result_list
