Merge pull request #110 from beetbox/sam/gstreamer-1.18-fix

gstdec: Update in line with GStreamer 1.18 API break

Author: sampsyo

README.rst

@@ -70,6 +70,9 @@ convert compressed audio files to WAV files.
 Version History
 ---------------
 
+2.1.9
+  Work correctly with GStreamer 1.18 and later (thanks to @ssssam)
+
 2.1.8
   Fix an unhandled ``OSError`` when FFmpeg is not installed.
 

audioread/gstdec.py

@@ -321,7 +321,14 @@ def _new_sample(self, sink):
             mem = buf.get_all_memory()
             success, info = mem.map(Gst.MapFlags.READ)
             if success:
-                data = info.data
+                if isinstance(info.data, memoryview):
+                    # We need to copy the data as the memoryview is released
+                    # when we call mem.unmap()
+                    data = bytes(info.data)
+                else:
+                    # GStreamer Python bindings <= 1.16 return a copy of the
+                    # data as bytes()
+                    data = info.data
                 mem.unmap(info)
                 self.queue.put(data)
             else: