def _create_pool(self):
"""
Allocates a pool of buffers for the encoder
"""
assert not self.pool
self.pool = mmal.mmal_port_pool_create(
self.output_port, self.output_port[0].buffer_num, self.output_port[0].buffer_size
)
if not self.pool:
raise PiCameraError("Failed to create buffer header pool for encoder component")
def _create_pool(self):
"""
Allocates a pool of buffers for the encoder
"""
assert not self.pool
self.pool = mmal.mmal_port_pool_create(self.output_port,
self.output_port[0].buffer_num,
self.output_port[0].buffer_size)
if not self.pool:
raise PiCameraError(
"Failed to create buffer header pool for encoder component")
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)
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)