Gravitational Waves with GStreamer Workshop

Canadian Institute for Theoretical Astrophysics

November 8–11, 2010

Held in association with the 20th Annual Midwest Relativity Meeting

Write a Basic Element

• Writing a GStreamer element in Python (LIGO-G1001050).
• Documentation tour
  • glib reference manual
  • gobject reference manual
  • gstreamer documentation
    • core reference manual
    • library reference manual
    • base plugins library reference manual
• Write a transform element in C
  • DO NOT copy-and-paste these!  Re-type them, to help you learn how to write them.
  • Boiler plate:  gstlal_mean_01_boilerplate.h, gstlal_mean_01_boilerplate.c
  • Add to plugin:  Makefile.am.patch, gstlal.c.patch
  • Add a property:  gstlal_mean_02_property.h, gstlal_mean_02_property.c
  • Add base class method overrides:  gstlal_mean_03_methods.h, gstlal_mean_03_methods.c
  • Almost finished:  gstlal_mean_04.h, gstlal_mean_04.c
  • Python script to dump input and output streams:  mean_demo.py
• Try event-based programming:
  • Add a signal:  gstlal_mean.h, gstlal_mean.c
  • Add a signal handler to mean_demo.py:  mean_demo.patch