%magic-entities; GStreamer"> GStreamer Application Development Manual"> GStreamer Library Reference"> ]> &TITLEPAGE; &GStreamer; is an exremely powerful and versatile framework for creating streaming media applications. Many of the virtues of the &GStreamer; framework come from its modularity: &GStreamer; can seamlessly incorporate new plugin modules. But because modularity and power often come at a cost of greater complexity (consider, for example, CORBA), writing new plugins is not always easy. This guide is intended to help you understand the &GStreamer; framework so you can develop new plugins to extend &GStreamer;'s functionality. This guide introduces most of the basic plugin writing issues in version &GstVersion; of &GStreamer;. This guide presents most issues in the context of an example audio filter plugin written in C. However, the guide also addresses some issues involved in writing other types of plugins, and the end of the guide also describes some of the Python bindings for &GStreamer;. &INTRO_PREFACE; &INTRO_BASICS; You now have the neccessary concepts to build your first plugin. In this part of the guide, you will learn how to apply these concepts to write a simple audio filter plugin. The previous parts of the guide have contained no explicit example code, perhaps making things a bit abstract and difficult to understand. In contrast, this section will present both applications and code by following the development of an example audio filter plugin called ExampleFilter. The example filter will begin with a single input pad and a single output pad. The filter will, at first, simply pass data through without modification. But by the end of this part of the guide, you will learn to add some more interesting functionality, including properties and signal handlers. And after reading the next part of the guide, , you will be able to add even more functionality to your plugins. The example code used in this part of the guide can be found in examples/pwg/examplefilter/ in your &GStreamer; directory. &BUILDING_BOILER; &BUILDING_PADS; &BUILDING_CHAINFN; &BUILDING_STATE; &BUILDING_PROPS; &BUILDING_SIGNALS; &BUILDING_TESTAPP; &ADVANCED_SCHEDULING; &ADVANCED_TYPES; &ADVANCED_REQUEST; &ADVANCED_CLOCK; &ADVANCED_DPARAMS; &ADVANCED_MIDI; &OTHER_SOURCE; &OTHER_SINK; &OTHER_AUTOPLUGGER; &APPENDIX_CHECKLIST; &APPENDIX_PYTHON;