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117 lines
3.3 KiB
117 lines
3.3 KiB
#!/usr/bin/env python3
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import os
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import sys
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import bz2
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import urllib.parse
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import capnp
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try:
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from xx.chffr.lib.filereader import FileReader
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except ImportError:
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from tools.lib.filereader import FileReader
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from cereal import log as capnp_log
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# this is an iterator itself, and uses private variables from LogReader
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class MultiLogIterator(object):
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def __init__(self, log_paths, wraparound=False):
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self._log_paths = log_paths
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self._wraparound = wraparound
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self._first_log_idx = next(i for i in range(len(log_paths)) if log_paths[i] is not None)
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self._current_log = self._first_log_idx
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self._idx = 0
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self._log_readers = [None]*len(log_paths)
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self.start_time = self._log_reader(self._first_log_idx)._ts[0]
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def _log_reader(self, i):
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if self._log_readers[i] is None and self._log_paths[i] is not None:
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log_path = self._log_paths[i]
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self._log_readers[i] = LogReader(log_path)
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return self._log_readers[i]
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def __iter__(self):
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return self
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def _inc(self):
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lr = self._log_reader(self._current_log)
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if self._idx < len(lr._ents)-1:
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self._idx += 1
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else:
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self._idx = 0
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self._current_log = next(i for i in range(self._current_log + 1, len(self._log_readers) + 1)
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if i == len(self._log_readers) or self._log_paths[i] is not None)
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# wraparound
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if self._current_log == len(self._log_readers):
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if self._wraparound:
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self._current_log = self._first_log_idx
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else:
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raise StopIteration
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def __next__(self):
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while 1:
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lr = self._log_reader(self._current_log)
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ret = lr._ents[self._idx]
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self._inc()
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return ret
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def tell(self):
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# returns seconds from start of log
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return (self._log_reader(self._current_log)._ts[self._idx] - self.start_time) * 1e-9
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def seek(self, ts):
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# seek to nearest minute
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minute = int(ts/60)
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if minute >= len(self._log_paths) or self._log_paths[minute] is None:
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return False
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self._current_log = minute
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# HACK: O(n) seek afterward
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self._idx = 0
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while self.tell() < ts:
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self._inc()
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return True
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class LogReader(object):
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def __init__(self, fn, canonicalize=True, only_union_types=False):
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data_version = None
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_, ext = os.path.splitext(urllib.parse.urlparse(fn).path)
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with FileReader(fn) as f:
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dat = f.read()
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if ext == "":
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# old rlogs weren't bz2 compressed
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ents = capnp_log.Event.read_multiple_bytes(dat)
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elif ext == ".bz2":
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dat = bz2.decompress(dat)
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ents = capnp_log.Event.read_multiple_bytes(dat)
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else:
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raise Exception(f"unknown extension {ext}")
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self._ents = list(ents)
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self._ts = [x.logMonoTime for x in self._ents]
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self.data_version = data_version
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self._only_union_types = only_union_types
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def __iter__(self):
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for ent in self._ents:
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if self._only_union_types:
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try:
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ent.which()
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yield ent
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except capnp.lib.capnp.KjException:
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pass
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else:
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yield ent
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if __name__ == "__main__":
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import codecs
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# capnproto <= 0.8.0 throws errors converting byte data to string
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# below line catches those errors and replaces the bytes with \x__
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codecs.register_error("strict", codecs.backslashreplace_errors)
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log_path = sys.argv[1]
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lr = LogReader(log_path)
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for msg in lr:
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print(msg)
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