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logger.py
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179 lines (161 loc) · 5.37 KB
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from savant.gstreamer import GObject, Gst, GstBase
from savant.utils.log import LoggerMixin
class Logger(LoggerMixin, GstBase.BaseTransform):
"""Logs buffers and events for debugging purpose."""
GST_PLUGIN_NAME: str = 'logger'
__gstmetadata__ = (
'Logger',
'Transform',
'Logs buffers and events for debugging purpose',
'Pavel Tomskikh <[email protected]>',
)
__gsttemplates__ = (
Gst.PadTemplate.new(
'src',
Gst.PadDirection.SRC,
Gst.PadPresence.ALWAYS,
Gst.Caps.new_any(),
),
Gst.PadTemplate.new(
'sink',
Gst.PadDirection.SINK,
Gst.PadPresence.ALWAYS,
Gst.Caps.new_any(),
),
)
__gproperties__ = {
'buffer-content': (
bool,
'Log buffer content',
'Log buffer content',
False,
GObject.ParamFlags.READWRITE,
),
'buffer-flags': (
bool,
'Log buffer flags',
'Log buffer flags',
False,
GObject.ParamFlags.READWRITE,
),
'buffer': (
bool,
'Log buffers',
'Log buffers',
True,
GObject.ParamFlags.READWRITE,
),
'event': (
bool,
'Log events',
'Log events',
True,
GObject.ParamFlags.READWRITE,
),
}
def __init__(self):
super().__init__()
self._buffer_content = False
self._buffer_flags = False
self._buffer = True
self._event = True
self.set_in_place(True)
self.set_passthrough(True)
def do_get_property(self, prop):
"""Gst plugin get property function.
:param prop: property parameters
"""
if prop.name == 'buffer-content':
return self._buffer_content
if prop.name == 'buffer-flags':
return self._buffer_flags
if prop.name == 'buffer':
return self._buffer
if prop.name == 'event':
return self._event
raise AttributeError(f'Unknown property {prop.name}.')
def do_set_property(self, prop, value):
"""Gst plugin set property function.
:param prop: property parameters
:param value: new value for param, type dependents on param
"""
if prop.name == 'buffer-content':
self._buffer_content = value
elif prop.name == 'buffer-flags':
self._buffer_flags = value
elif prop.name == 'buffer':
self._buffer = value
elif prop.name == 'event':
self._event = value
else:
raise AttributeError(f'Unknown property {prop.name}.')
def do_transform_ip(self, buffer: Gst.Buffer):
if self._buffer:
log_line = 'Got buffer. PTS: %s. DTS: %s. Duration: %s. Size: %s.'
args = [
buffer.pts,
buffer.dts,
buffer.duration,
buffer.get_size(),
]
if self._buffer_flags:
log_line += ' Flags: %s.'
flags: Gst.BufferFlags = buffer.get_flags()
args.append(
', '.join(flags.value_names) if flags is not None else flags
)
if self._buffer_content:
log_line += ' Content: %s.'
args.append(buffer.extract_dup(0, buffer.get_size()))
self.logger.info(log_line, *args)
return Gst.FlowReturn.OK
def do_src_event(self, event: Gst.Event):
if self._event:
self.logger.info('Got src event. %s', _parse_event(event))
# Cannot use `super()` since it is `self`
return GstBase.BaseTransform.do_src_event(self, event)
def do_sink_event(self, event: Gst.Event):
if self._event:
self.logger.info('Got sink event. %s', _parse_event(event))
# Cannot use `super()` since it is `self`
return GstBase.BaseTransform.do_sink_event(self, event)
def _parse_event(event: Gst.Event):
value = None
if event.type == Gst.EventType.TAG:
value = event.parse_tag().to_string()
elif event.type == Gst.EventType.CAPS:
value = event.parse_caps().to_string()
elif event.type == Gst.EventType.STREAM_START:
value = event.parse_stream_start()
elif event.type == Gst.EventType.STREAM_GROUP_DONE:
value = event.parse_stream_group_done()
elif event.type == Gst.EventType.SEGMENT:
x: Gst.Segment = event.parse_segment()
value = ', '.join(
[
f'format={x.format.value_name}',
f'duration={x.duration}',
f'start={x.start}',
f'stop={x.stop}',
f'position={x.position}',
f'time={x.time}',
f'base={x.base}',
f'offset={x.offset}',
f'flags={x.flags.value_names}',
]
)
elif event.type == Gst.EventType.LATENCY:
value = event.parse_latency()
message = f'Type: {event.type}'
if value is not None:
message += f'. Value: {value}'
struct = event.get_structure()
message += f'. Structure: {struct}'
return message
# register plugin
GObject.type_register(Logger)
__gstelementfactory__ = (
Logger.GST_PLUGIN_NAME,
Gst.Rank.NONE,
Logger,
)