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Code Issues Projects Releases Wiki Activity

Birdseye Autolayout (#6734)

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* Calculate possible layout

* Working in ideal conditions

* Fix issues with different heights

* Remove logs

* Optimally handle cameras that don't match the canvas aspect ratio

* Make sure to copy so list is not overwritten

* Remove unused import

* Remove try catch

* Optimize layout for low amount of cameras

* Try to scale frames up if not enough space is used
This commit is contained in:
Nicolas Mowen 2023-06-11 06:54:18 -06:00 committed by GitHub
parent 8d941e5e26
commit fd6eb78f41
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1 changed files with 148 additions and 95 deletions
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243
frigate/output.py
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@ -1,7 +1,6 @@
import datetime import datetime
import glob import glob
import logging import logging
import math
import multiprocessing as mp import multiprocessing as mp
import os import os
import queue import queue
@ -210,6 +209,7 @@ class BirdsEyeFrameManager:
), ),
) )
self.cameras[camera] = { self.cameras[camera] = {
"dimensions": [settings.detect.width, settings.detect.height],
"last_active_frame": 0.0, "last_active_frame": 0.0,
"current_frame": 0.0, "current_frame": 0.0,
"layout_frame": 0.0, "layout_frame": 0.0,
@ -224,7 +224,6 @@ class BirdsEyeFrameManager:
self.camera_layout = [] self.camera_layout = []
self.active_cameras = set() self.active_cameras = set()
self.layout_dim = 0
self.last_output_time = 0.0 self.last_output_time = 0.0
def clear_frame(self): def clear_frame(self):
@ -250,8 +249,8 @@ class BirdsEyeFrameManager:
copy_yuv_to_position( copy_yuv_to_position(
self.frame, self.frame,
self.layout_offsets[position], [position[1], position[0]],
self.layout_frame_shape, [position[3], position[2]],
frame, frame,
channel_dims, channel_dims,
) )
@ -267,6 +266,67 @@ class BirdsEyeFrameManager:
return True return True
def update_frame(self): def update_frame(self):
"""Update to a new frame for birdseye."""
def calculate_layout(
canvas, cameras_to_add: list[str], coefficient
) -> tuple[any]:
"""Calculate the optimal layout for cameras."""
camera_layout: list[list[any]] = []
camera_layout.append([])
canvas_aspect = canvas[0] / canvas[1]
x = 0
y = 0
y_i = 0
max_height = 0
for camera in cameras_to_add:
camera_dims = self.cameras[camera]["dimensions"].copy()
camera_aspect = camera_dims[0] / camera_dims[1]
# if the camera aspect ratio is less than canvas aspect ratio, it needs to be scaled down to fit
if camera_aspect < canvas_aspect:
camera_dims[0] *= camera_aspect / canvas_aspect
camera_dims[1] *= camera_aspect / canvas_aspect
if (x + camera_dims[0] * coefficient) <= canvas[0]:
# insert if camera can fit on current row
camera_layout[y_i].append(
(
camera,
(
x,
y,
int(camera_dims[0] * coefficient),
int(camera_dims[1] * coefficient),
),
)
)
x += int(camera_dims[0] * coefficient)
max_height = max(
max_height,
int(camera_dims[1] * coefficient),
)
else:
# move on to the next row and insert
y += max_height
y_i += 1
camera_layout.append([])
x = 0
camera_layout[y_i].append(
(
camera,
(
x,
y,
int(camera_dims[0] * coefficient),
int(camera_dims[1] * coefficient),
),
)
)
x += int(camera_dims[0] * coefficient)
return (camera_layout, y + max_height)
# determine how many cameras are tracking objects within the last 30 seconds # determine how many cameras are tracking objects within the last 30 seconds
active_cameras = set( active_cameras = set(
[ [
@ -285,115 +345,108 @@ class BirdsEyeFrameManager:
# if the layout needs to be cleared # if the layout needs to be cleared
else: else:
self.camera_layout = [] self.camera_layout = []
self.layout_dim = 0 self.active_cameras = set()
self.clear_frame() self.clear_frame()
return True return True
# calculate layout dimensions
layout_dim = math.ceil(math.sqrt(len(active_cameras)))
# check if we need to reset the layout because there are new cameras to add # check if we need to reset the layout because there are new cameras to add
reset_layout = ( reset_layout = (
True if len(active_cameras.difference(self.active_cameras)) > 0 else False True if len(active_cameras.difference(self.active_cameras)) > 0 else False
) )
# reset the layout if it needs to be different # reset the layout if it needs to be different
if layout_dim != self.layout_dim or reset_layout: if reset_layout:
if reset_layout: logger.debug("Added new cameras, resetting layout...")
logger.debug("Added new cameras, resetting layout...") self.clear_frame()
self.active_cameras = active_cameras
logger.debug(f"Changing layout size from {self.layout_dim} to {layout_dim}") # this also converts added_cameras from a set to a list since we need
self.layout_dim = layout_dim # to pop elements in order
active_cameras_to_add = sorted(
self.camera_layout = [None] * layout_dim * layout_dim active_cameras,
# sort cameras by order and by name if the order is the same
# calculate resolution of each position in the layout key=lambda active_camera: (
self.layout_frame_shape = ( self.config.cameras[active_camera].birdseye.order,
self.frame_shape[0] // layout_dim, # height active_camera,
self.frame_shape[1] // layout_dim, # width ),
) )
self.clear_frame() canvas_width = self.config.birdseye.width
canvas_height = self.config.birdseye.height
for cam_data in self.cameras.values(): if len(active_cameras) == 1:
cam_data["layout_frame"] = 0.0 # show single camera as fullscreen
camera = active_cameras_to_add[0]
self.active_cameras = set() camera_dims = self.cameras[camera]["dimensions"].copy()
scaled_width = int(canvas_height * camera_dims[0] / camera_dims[1])
self.layout_offsets = [] coefficient = (
1 if scaled_width <= canvas_width else canvas_width / scaled_width
# calculate the x and y offset for each position in the layout
for position in range(0, len(self.camera_layout)):
y_offset = self.layout_frame_shape[0] * math.floor(
position / self.layout_dim
) )
x_offset = self.layout_frame_shape[1] * (position % self.layout_dim) self.camera_layout = [
self.layout_offsets.append((y_offset, x_offset)) [
(
camera,
(
0,
0,
int(scaled_width * coefficient),
int(canvas_height * coefficient),
),
)
]
]
elif len(active_cameras) == 2:
# split canvas in half for 2 cameras
top_camera = active_cameras_to_add[0]
top_camera_dims = self.cameras[top_camera]["dimensions"].copy()
bottom_camera = active_cameras_to_add[1]
bottom_camera_dims = self.cameras[bottom_camera]["dimensions"].copy()
top_scaled_width = int(
(canvas_height / 2) * top_camera_dims[0] / top_camera_dims[1]
)
bottom_scaled_width = int(
(canvas_height / 2) * bottom_camera_dims[0] / bottom_camera_dims[1]
)
self.camera_layout = [
[(top_camera, (0, 0, top_scaled_width, int(canvas_height / 2)))],
[
(
bottom_camera,
(
0,
int(canvas_height / 2),
bottom_scaled_width,
int(canvas_height / 2),
),
)
],
]
else:
# calculate optimal layout
coefficient = 1.0
removed_cameras = self.active_cameras.difference(active_cameras) # decrease scaling coefficient until height of all cameras can fit into the birdseye canvas
added_cameras = active_cameras.difference(self.active_cameras) while True:
layout_candidate, total_height = calculate_layout(
self.active_cameras = active_cameras (canvas_width, canvas_height),
active_cameras_to_add,
# this also converts added_cameras from a set to a list since we need coefficient,
# to pop elements in order
added_cameras = sorted(
added_cameras,
# sort cameras by order and by name if the order is the same
key=lambda added_camera: (
self.config.cameras[added_camera].birdseye.order,
added_camera,
),
# we're popping out elements from the end, so this needs to be reverse
# as we want the last element to be the first
reverse=True,
)
# update each position in the layout
for position, camera in enumerate(self.camera_layout, start=0):
# if this camera was removed, replace it or clear it
if camera in removed_cameras:
# if replacing this camera with a newly added one
if len(added_cameras) > 0:
added_camera = added_cameras.pop()
self.camera_layout[position] = added_camera
self.copy_to_position(
position,
added_camera,
self.cameras[added_camera]["current_frame"],
) )
self.cameras[added_camera]["layout_frame"] = self.cameras[
added_camera if (canvas_height * 0.9) < total_height <= canvas_height:
]["current_frame"] break
# if removing this camera with no replacement elif total_height < canvas_height * 0.8:
else: coefficient += 0.1
self.camera_layout[position] = None else:
self.copy_to_position(position) coefficient -= 0.1
removed_cameras.remove(camera)
# if an empty spot and there are cameras to add self.camera_layout = layout_candidate
elif camera is None and len(added_cameras) > 0:
added_camera = added_cameras.pop() for row in self.camera_layout:
self.camera_layout[position] = added_camera for position in row:
self.copy_to_position( self.copy_to_position(
position, position[1], position[0], self.cameras[position[0]]["current_frame"]
added_camera,
self.cameras[added_camera]["current_frame"],
) )
self.cameras[added_camera]["layout_frame"] = self.cameras[added_camera][
"current_frame"
]
# if not an empty spot and the camera has a newer frame, copy it
elif (
camera is not None
and self.cameras[camera]["current_frame"]
!= self.cameras[camera]["layout_frame"]
):
self.copy_to_position(
position, camera, self.cameras[camera]["current_frame"]
)
self.cameras[camera]["layout_frame"] = self.cameras[camera][
"current_frame"
]
return True return True