gst/audiobuffer/: Add first version of an audioringbuffer element that can be inserte...

gst/audiobuffer/: Add first version of an audioringbuffer element that can be inserted in the pipeline to convert pus...

Original commit message from CVS:
* gst/audiobuffer/Makefile.am:
* gst/audiobuffer/gstaudioringbuffer.c:
(gst_int_ring_buffer_acquire), (gst_int_ring_buffer_release),
(gst_int_ring_buffer_start), (gst_int_ring_buffer_base_init),
(gst_int_ring_buffer_class_init), (gst_int_ring_buffer_init),
(gst_int_ring_buffer_new), (gst_audio_ringbuffer_get_type),
(gst_audio_ringbuffer_class_init), (gst_audio_ringbuffer_init),
(gst_audio_ringbuffer_finalize), (gst_audio_ringbuffer_getcaps),
(gst_audio_ringbuffer_setcaps), (gst_audio_ringbuffer_bufferalloc),
(gst_audio_ringbuffer_handle_sink_event),
(gst_audio_ringbuffer_render), (gst_audio_ringbuffer_chain),
(gst_audio_ringbuffer_handle_src_event),
(gst_audio_ringbuffer_handle_src_query),
(gst_audio_ringbuffer_get_range),
(gst_audio_ringbuffer_src_checkgetrange_function),
(gst_audio_ringbuffer_sink_activate_push),
(gst_audio_ringbuffer_src_activate_push),
(gst_audio_ringbuffer_src_activate_pull),
(gst_audio_ringbuffer_change_state),
(gst_audio_ringbuffer_set_property),
(gst_audio_ringbuffer_get_property), (plugin_init):
Add first version of an audioringbuffer element that can be inserted in
the pipeline to convert push-based upstream into a pull-based
downstream.