Add audioiirfilter and audiofirfilter elements which allow generic IIR/FIR filters to be implemented by providing the...

Original commit message from CVS:
* configure.ac:
* gst/audiofx/Makefile.am:
* gst/audiofx/audiofirfilter.c: (gst_audio_fir_filter_base_init),
(gst_audio_fir_filter_class_init),
(gst_audio_fir_filter_update_kernel), (gst_audio_fir_filter_init),
(gst_audio_fir_filter_setup), (gst_audio_fir_filter_finalize),
(gst_audio_fir_filter_set_property),
(gst_audio_fir_filter_get_property):
* gst/audiofx/audiofirfilter.h:
* gst/audiofx/audiofx.c: (plugin_init):
* gst/audiofx/audioiirfilter.c: (gst_audio_iir_filter_base_init),
(gst_audio_iir_filter_class_init),
(gst_audio_iir_filter_update_coefficients),
(gst_audio_iir_filter_init), (gst_audio_iir_filter_setup),
(gst_audio_iir_filter_finalize),
(gst_audio_iir_filter_set_property),
(gst_audio_iir_filter_get_property):
* gst/audiofx/audioiirfilter.h:
Add audioiirfilter and audiofirfilter elements which allow
generic IIR/FIR filters to be implemented by providing the
filter coefficients. Fixes bug #567577.
* docs/plugins/Makefile.am:
* docs/plugins/gst-plugins-good-plugins-docs.sgml:
* docs/plugins/gst-plugins-good-plugins-sections.txt:
* docs/plugins/gst-plugins-good-plugins.args:
* docs/plugins/gst-plugins-good-plugins.hierarchy:
* docs/plugins/gst-plugins-good-plugins.signals:
* docs/plugins/inspect/plugin-alaw.xml:
* docs/plugins/inspect/plugin-audiofx.xml:
* docs/plugins/inspect/plugin-avi.xml:
* docs/plugins/inspect/plugin-flac.xml:
* docs/plugins/inspect/plugin-mulaw.xml:
* docs/plugins/inspect/plugin-video4linux2.xml:
* docs/plugins/inspect/plugin-wavparse.xml:
Add documentation for the audioiirfilter and audiofirfilter
elements.
* tests/check/Makefile.am:
* tests/check/elements/audiofirfilter.c: (on_message),
(on_rate_changed), (on_handoff), (GST_START_TEST),
(audiofirfilter_suite):
* tests/check/elements/audioiirfilter.c: (on_message),
(on_rate_changed), (on_handoff), (GST_START_TEST),
(audioiirfilter_suite):
* tests/examples/Makefile.am:
* tests/examples/audiofx/Makefile.am:
* tests/examples/audiofx/firfilter-example.c: (on_message),
(on_rate_changed), (main):
* tests/examples/audiofx/iirfilter-example.c: (on_message),
(on_rate_changed), (main):
Add unit tests and example applications for the two filter
elements.