io.gcf: fix bitmask for getting compression code

fixes #2290
obspy · Feb 14, 2019 · 5ff4ed2 · 5ff4ed2
1 parent baa8ac5
commit 5ff4ed2
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Showing 2 changed files with 3 additions and 1 deletion.
diff --git a/CHANGELOG.txt b/CHANGELOG.txt
@@ -44,6 +44,8 @@
      object to CNV (see #2001)
  - obspy.io.css:
    * Fix automatic filetype detection (see #2160 and #2162)
+ - obspy.io.gcf:
+   * Fix bitmask in getting compression code (see #2290, #2310)
  - obspy.io.mseed:
    * Ability to read files that have embedded chunks of non SEED data.
      (see #1981, #2057).

diff --git a/obspy/io/gcf/libgcf.py b/obspy/io/gcf/libgcf.py
@@ -104,7 +104,7 @@ def read_data_block(f, headonly=False, channel_prefix="HH", **kwargs):
     # number of 32bit records (num_records)
     reserved, sps, compress, num_records = np.frombuffer(f.read(4), count=4,
                                                          dtype='>u1')
-    compression = compress & 0b00001111  # get compression code
+    compression = compress & 0b00000111  # get compression code
     t_offset = compress >> 4  # get time offset
     if t_offset > 0:
         starttime = starttime + t_offset / TIME_OFFSETS_D[sps]