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gstreamer/debug-viewer/GstDebugViewer/Data.py
René Stadler 25f8f316d7 Move final log line parsing from GUI to Data module
2014-09-11 20:51:38 +02:00

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# -*- coding: utf-8; mode: python; -*-
#
# GStreamer Debug Viewer
#
# Copyright (C) 2007 René Stadler <mail@renestadler.de>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3 of the License, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
"""GStreamer debug viewer data module"""
import logging
import re
# Nanosecond resolution (like gst.SECOND)
SECOND = 1000000000
def time_args (ts):
secs = ts // SECOND
return "%i:%02i:%02i.%09i" % (secs // 60**2,
secs // 60 % 60,
secs % 60,
ts % SECOND,)
def time_args_no_hours (ts):
secs = ts // SECOND
return "%02i:%02i.%09i" % (secs // 60,
secs % 60,
ts % SECOND,)
def parse_time (st):
"""Parse time strings that look like "0:00:00.0000000"."""
h, m, s = st.split (":")
secs, subsecs = s.split (".")
return (long ((int (h) * 60**2 + int (m) * 60) * SECOND) +
long (secs) * SECOND + long (subsecs))
class DebugLevel (int):
__names = ["NONE", "ERROR", "WARN", "INFO", "DEBUG", "LOG"]
__instances = {}
def __new__ (cls, level):
try:
level_int = int (level)
except (ValueError, TypeError,):
try:
level_int = cls.__names.index (level.upper ())
except ValueError:
raise ValueError ("no debug level named %r" % (level,))
if level_int in cls.__instances:
return cls.__instances[level_int]
else:
new_instance = int.__new__ (cls, level_int)
new_instance.name = cls.__names[level_int]
cls.__instances[level_int] = new_instance
return new_instance
def __repr__ (self):
return "<%s %s (%i)>" % (type (self).__name__, self.__names[self], self,)
def higher_level (self):
if self == len (self.__names) - 1:
raise ValueError ("already the highest debug level")
return DebugLevel (self + 1)
def lower_level (self):
if self == 0:
raise ValueError ("already the lowest debug level")
return DebugLevel (self - 1)
debug_level_none = DebugLevel ("NONE")
debug_level_error = DebugLevel ("ERROR")
debug_level_warning = DebugLevel ("WARN")
debug_level_info = DebugLevel ("INFO")
debug_level_debug = DebugLevel ("DEBUG")
debug_level_log = DebugLevel ("LOG")
# For stripping color codes:
_escape = re.compile ("\x1b\\[[0-9;]*m")
def strip_escape (s):
# FIXME: This can be optimized further!
while "\x1b" in s:
s = _escape.sub ("", s)
return s
def default_log_line_regex_ ():
# "DEBUG "
LEVEL = "([A-Z]+) +"
# "0x8165430 "
THREAD = r"(0x[0-9a-f]+) +" #r"\((0x[0-9a-f]+) - "
# "0:00:00.777913000 "
TIME = r"([0-9]+:[0-9][0-9]:[0-9][0-9]\.[0-9]+) +"
CATEGORY = "([A-Za-z_-]+) +" # "GST_REFCOUNTING ", "flacdec "
# " 3089 "
PID = r"([0-9]+) +"
FILENAME = r"([^:]+):"
LINE = r"([0-9]+):"
FUNCTION = "([A-Za-z0-9_]+):"
# FIXME: When non-g(st)object stuff is logged with *_OBJECT (like
# buffers!), the address is printed *without* <> brackets!
OBJECT = "(?:<([^>]+)>)?"
MESSAGE = " (.+)"
expressions = [" *", CATEGORY, FILENAME, LINE, FUNCTION, OBJECT]
# New log format:
## expressions = [TIME, PID, THREAD, LEVEL, CATEGORY, FILENAME, LINE, FUNCTION,
## OBJECT, MESSAGE]
# Old log format:
## expressions = [LEVEL, THREAD, TIME, CATEGORY, PID, FILENAME, LINE,
## FUNCTION, OBJECT, MESSAGE]
return expressions
def default_log_line_regex ():
expressions = default_log_line_regex_ ()
return re.compile ("".join (expressions))
class Producer (object):
def __init__ (self):
self.consumers = []
def have_load_started (self):
for consumer in self.consumers:
consumer.handle_load_started ()
def have_load_finished (self):
for consumer in self.consumers:
consumer.handle_load_finished ()
class LineCache (Producer):
_lines_per_iteration = 50000
def __init__ (self, fileobj, dispatcher):
Producer.__init__ (self)
self.logger = logging.getLogger ("linecache")
self.offsets = []
self.levels = [] # FIXME
self.dispatcher = dispatcher
import mmap
self.__fileobj = mmap.mmap (fileobj.fileno (), 0, prot = mmap.PROT_READ)
self.__fileobj.seek (0, 2)
self.__file_size = self.__fileobj.tell ()
self.__fileobj.seek (0)
def start_loading (self):
self.logger.debug ("dispatching load process")
self.have_load_started ()
self.dispatcher (self.__process ())
def get_progress (self):
return float (self.__fileobj.tell ()) / self.__file_size
def __process (self):
offsets = self.offsets
levels = self.levels
# FIXME: Duplicated from GUI.LazyLogModel!
ts_len = 17
pid_len = 5
# Need to find out thread len below...
level_len = 5
thread_start = ts_len + 1 + pid_len + 1
dict_levels = {"D" : debug_level_debug, "L" : debug_level_log,
"I" : debug_level_info, "E" : debug_level_error,
"W" : debug_level_warning, " " : debug_level_none}
readline = self.__fileobj.readline
tell = self.__fileobj.tell
self.__fileobj.seek (0)
limit = self._lines_per_iteration
i = 0
while True:
offset = tell ()
line = readline ()
if not line:
break
if not line.strip ():
# Ignore empty lines, especially the one established by the
# final newline at the end:
continue
# FIXME: We need to handle foreign lines separately!
if line[1] != ":" or line[4] != ":" or line[7] != ".":
# No timestamp at start, ignore line:
continue
thread_end = line.find (" ", thread_start)
offsets.append (offset)
levels.append (dict_levels[line[thread_end + 1:thread_end + 2]])
i += 1
if i >= limit:
i = 0
yield True
self.have_load_finished ()
yield False
class LogLine (list):
@classmethod
def parse_full (cls, line_string):
ts_len = 17
pid_len = 5
thread_pos = ts_len + 1 + pid_len + 1
thread_len = line[thread_pos:thread_pos + 32].find (" ")
level_len = 5
non_regex_len = ts_len + 1 + pid_len + thread_len + 1 + level_len + 1
non_regex_line = line[:non_regex_len]
regex_line = line[non_regex_len:]
prefix = non_regex_line.rstrip ()
while " " in prefix:
prefix = prefix.replace (" ", " ")
ts_s, pid_s, thread_s = prefix.split (" ")[:-1] # Omits level.
ts = parse_time (ts_s)
pid = int (pid_s)
thread = int (thread_s, 16)
try:
## level = DebugLevel (level_s)
match = self.__line_regex.match (regex_line[:-len (os.linesep)])
except ValueError:
level = debug_level_none
match = None
if match is None:
# FIXME?
groups = [ts, pid, thread, 0, "", "", 0, "", "", non_regex_len]
else:
# FIXME: Level (the 0 after thread) needs to be moved out of here!
groups = [ts, pid, thread, 0] + list (match.groups ()) + [non_regex_len + match.end ()]
for col_id in (self.COL_CATEGORY, self.COL_FILENAME, self.COL_FUNCTION,
self.COL_OBJECT,):
groups[col_id] = intern (groups[col_id] or "")
groups[6] = int (groups[6]) # line
# groups[8] = groups[8] or "" # object (optional)
return cls (groups)
class LogFile (Producer):
def __init__ (self, filename, dispatcher):
Producer.__init__ (self)
self.logger = logging.getLogger ("logfile")
self.fileobj = file (filename, "rb")
self.line_cache = LineCache (self.fileobj, dispatcher)
self.line_cache.consumers.append (self)
def start_loading (self):
self.logger.debug ("starting load")
self.line_cache.start_loading ()
def get_load_progress (self):
return self.line_cache.get_progress ()
def handle_load_started (self):
# Chain up to our consumers:
self.have_load_started ()
def handle_load_finished (self):
# Chain up to our consumers:
self.have_load_finished ()
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