def __init__(
self, parent, camera_port, input_port, format, resize, **options):
# If a resize hasn't been requested, check the input_port format. If
# it requires conversion, force the use of a resizer to perform the
# conversion
if not resize:
if parent.RAW_FORMATS[format] != input_port[0].format[0].encoding.value:
resize = parent.resolution
# Workaround: If a non-alpha format is requested when a resizer is
# required, we use the alpha-inclusive format and set a flag to get the
# callback to strip the alpha bytes (for some reason the resizer won't
# work with non-alpha output formats - firmware bug?)
if resize:
width, height = resize
self._strip_alpha = format in ('rgb', 'bgr')
else:
width, height = parent.resolution
self._strip_alpha = False
width = mmal.VCOS_ALIGN_UP(width, 32)
height = mmal.VCOS_ALIGN_UP(height, 16)
# Workaround (#83): when the resizer is used the width and height must
# be aligned (both the actual and crop values) to avoid an error when
# the output port format is set
if resize:
resize = (width, height)
# Workaround: Calculate the expected image size, to be used by the
# callback to decide when a frame ends. This is to work around a
# firmware bug that causes the raw image to be returned twice when the
# maximum camera resolution is requested
self._expected_size = int(width * height * self.RAW_ENCODINGS[format][1])
self._image_size = 0
super(PiRawEncoderMixin, self).__init__(
parent, camera_port, input_port, format, resize, **options)
def _create_resizer(self, width, height):
self.resizer = ct.POINTER(mmal.MMAL_COMPONENT_T)()
mmal_check(
mmal.mmal_component_create(
mmal.MMAL_COMPONENT_DEFAULT_RESIZER, self.resizer),
prefix="Failed to create resizer component")
if not self.resizer[0].input_num:
raise PiCameraError("No input ports on resizer component")
if not self.resizer[0].output_num:
raise PiCameraError("No output ports on resizer component")
# Copy the original input port's format to the resizer's input,
# then the resizer's input format to the output, and configure it
mmal.mmal_format_copy(
self.resizer[0].input[0][0].format, self.input_port[0].format)
mmal_check(
mmal.mmal_port_format_commit(self.resizer[0].input[0]),
prefix="Failed to set resizer input port format")
mmal.mmal_format_copy(
self.resizer[0].output[0][0].format, self.resizer[0].input[0][0].format)
fmt = self.resizer[0].output[0][0].format
fmt[0].es[0].video.width = mmal.VCOS_ALIGN_UP(width, 32)
fmt[0].es[0].video.height = mmal.VCOS_ALIGN_UP(height, 16)
fmt[0].es[0].video.crop.x = 0
fmt[0].es[0].video.crop.y = 0
fmt[0].es[0].video.crop.width = width
fmt[0].es[0].video.crop.height = height
mmal_check(
mmal.mmal_port_format_commit(self.resizer[0].output[0]),
prefix="Failed to set resizer output port format")
def test_overlay_array1(camera, mode):
resolution, framerate = mode
# Draw a cross overlay
w, h = resolution
w = mmal.VCOS_ALIGN_UP(w, 32)
h = mmal.VCOS_ALIGN_UP(h, 16)
a = np.zeros((h, w, 3), dtype=np.uint8)
a[resolution[1] // 2, :, :] = 0xff
a[:, resolution[0] // 2, :] = 0xff
overlay = camera.add_overlay(a, resolution, alpha=128)
assert len(camera.overlays) == 1
assert camera.overlays[0].alpha == 128
camera.remove_overlay(overlay)
assert not camera.overlays
def normalize_dimension(dimension):
"""
Normalizes a dimension so that it's width is a multiple of 32 and
it's height is a multiple of 16.
:param dimension:
:return:
"""
if len(dimension) == 4:
return (int(dimension[0]), int(dimension[1]),
mmal.VCOS_ALIGN_UP(int(dimension[2]), 32),
mmal.VCOS_ALIGN_UP(int(dimension[3]), 16))
else:
return (mmal.VCOS_ALIGN_UP(int(dimension[0]), 32),
mmal.VCOS_ALIGN_UP(int(dimension[1]), 16))
def __init__(self,
parent,
source,
size=None,
layer=0,
alpha=255,
fullscreen=True,
window=None,
crop=None,
rotation=0,
vflip=False,
hflip=False):
super(PiOverlayRenderer,
self).__init__(parent, layer, alpha, fullscreen, window, crop,
rotation, vflip, hflip)
# Copy format from camera's preview port, then adjust the encoding to
# RGB888 and optionally adjust the resolution and size
port = self.renderer[0].input[0]
fmt = port[0].format
mmal.mmal_format_copy(
fmt,
parent._camera[0].output[parent.CAMERA_PREVIEW_PORT][0].format)
fmt[0].encoding = mmal.MMAL_ENCODING_RGB24
fmt[0].encoding_variant = mmal.MMAL_ENCODING_RGB24
if size is not None:
w, h = size
fmt[0].es[0].video.width = mmal.VCOS_ALIGN_UP(w, 32)
fmt[0].es[0].video.height = mmal.VCOS_ALIGN_UP(h, 16)
fmt[0].es[0].video.crop.width = w
fmt[0].es[0].video.crop.height = h
mmal_check(mmal.mmal_port_format_commit(port),
prefix="Overlay format couldn't be set")
port[0].buffer_num = port[0].buffer_num_min
port[0].buffer_size = port[0].buffer_size_recommended
mmal_check(mmal.mmal_component_enable(self.renderer),
prefix="Overlay couldn't be enabled")
mmal_check(mmal.mmal_port_enable(port, _overlay_callback),
prefix="Overlay input port couldn't be enabled")
self.pool = mmal.mmal_port_pool_create(port, port[0].buffer_num,
port[0].buffer_size)
if not self.pool:
raise PiCameraRuntimeError("Couldn't create pool for overlay")
self.update(source)