Original commit message from CVS: * gst-libs/gst/audio/mixerutils.h: Add G_BEGIN_DECLS and G_END_DECLS guards so these helpers can be used when compiling with c++ compilers as well.
Original commit message from CVS: * docs/libs/gst-plugins-base-libs-docs.sgml: * docs/libs/gst-plugins-base-libs-sections.txt: * gst-libs/gst/audio/mixerutils.c: * gst-libs/gst/audio/mixerutils.h: Add docs for mixerutils stuff.
Original commit message from CVS: * gst-libs/gst/audio/Makefile.am: * gst-libs/gst/audio/mixerutils.c: (gst_audio_mixer_filter_do_filter), (gst_audio_mixer_filter_check_element), (gst_audio_mixer_filter_probe_feature), (element_factory_rank_compare_func), (gst_audio_default_registry_mixer_filter): * gst-libs/gst/audio/mixerutils.h: Add gst_audio_default_registry_mixer_filter() utility function.