def start(self, output):
"""
Starts the encoder object writing to the specified output
"""
self.event.clear()
self.stopped = False
self.exception = None
self._open_output(output)
self.output_port[0].userdata = ct.cast(ct.pointer(ct.py_object(self)),
ct.c_void_p)
mmal_check(mmal.mmal_port_enable(self.output_port, _encoder_callback),
prefix="Failed to enable encoder output port")
for q in range(mmal.mmal_queue_length(self.pool[0].queue)):
buf = mmal.mmal_queue_get(self.pool[0].queue)
if not buf:
raise PiCameraRuntimeError(
"Unable to get a required buffer from pool queue")
mmal_check(mmal.mmal_port_send_buffer(self.output_port, buf),
prefix="Unable to send a buffer to encoder output port")
b = mmal.MMAL_BOOL_T()
mmal_check(mmal.mmal_port_parameter_get_boolean(
self.camera_port, mmal.MMAL_PARAMETER_CAPTURE, b),
prefix="Failed to query capture status")
self.started_capture = not bool(b)
if self.started_capture:
mmal_check(mmal.mmal_port_parameter_set_boolean(
self.camera_port, mmal.MMAL_PARAMETER_CAPTURE, mmal.MMAL_TRUE),
prefix="Failed to start capture")
def start(self, output):
"""
Starts the encoder object writing to the specified output
"""
self.event.clear()
self.stopped = False
self.exception = None
self._open_output(output)
self.output_port[0].userdata = ct.cast(ct.pointer(ct.py_object(self)), ct.c_void_p)
mmal_check(
mmal.mmal_port_enable(self.output_port, _encoder_callback), prefix="Failed to enable encoder output port"
)
for q in range(mmal.mmal_queue_length(self.pool[0].queue)):
buf = mmal.mmal_queue_get(self.pool[0].queue)
if not buf:
raise PiCameraRuntimeError("Unable to get a required buffer from pool queue")
mmal_check(
mmal.mmal_port_send_buffer(self.output_port, buf),
prefix="Unable to send a buffer to encoder output port",
)
b = mmal.MMAL_BOOL_T()
mmal_check(
mmal.mmal_port_parameter_get_boolean(self.camera_port, mmal.MMAL_PARAMETER_CAPTURE, b),
prefix="Failed to query capture status",
)
self.started_capture = not bool(b)
if self.started_capture:
mmal_check(
mmal.mmal_port_parameter_set_boolean(self.camera_port, mmal.MMAL_PARAMETER_CAPTURE, mmal.MMAL_TRUE),
prefix="Failed to start capture",
)
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)
def start(self, output):
"""
Starts the encoder object writing to the specified output
"""
self.event.clear()
self.stopped = False
self.exception = None
self._open_output(output)
self.output_port[0].userdata = ct.cast(ct.pointer(ct.py_object(self)),
ct.c_void_p)
mmal_check(mmal.mmal_port_enable(self.output_port, _encoder_callback),
prefix="Failed to enable encoder output port")
for q in range(mmal.mmal_queue_length(self.pool[0].queue)):
buf = mmal.mmal_queue_get(self.pool[0].queue)
if not buf:
raise PiCameraRuntimeError(
"Unable to get a required buffer from pool queue")
mmal_check(mmal.mmal_port_send_buffer(self.output_port, buf),
prefix="Unable to send a buffer to encoder output port")
def start(self, output):
"""
Starts the encoder object writing to the specified output
"""
self.event.clear()
self.stopped = False
self.exception = None
self._open_output(output)
self.output_port[0].userdata = ct.cast(
ct.pointer(ct.py_object(self)),
ct.c_void_p)
mmal_check(
mmal.mmal_port_enable(self.output_port, _encoder_callback),
prefix="Failed to enable encoder output port")
for q in range(mmal.mmal_queue_length(self.pool[0].queue)):
buf = mmal.mmal_queue_get(self.pool[0].queue)
if not buf:
raise PiCameraRuntimeError(
"Unable to get a required buffer from pool queue")
mmal_check(
mmal.mmal_port_send_buffer(self.output_port, buf),
prefix="Unable to send a buffer to encoder output port")