1) Add flexible seeking support (including absolute) for memory block queues and playback streams

2) Add support to synchronize multiple playback streams
3) add two tests for 1) and 2)
4) s/PA_ERROR/PA_ERR/
5) s/PA_ERROR_OK/PA_OK/
6) update simple API to deal properly with new peek/drop recording API
7) add beginnings of proper validity checking on API calls in client libs (needs to be extended)
8) report playback buffer overflows/underflows to the client
9) move client side recording mcalign stuff into the memblockq 
10) create typedefs for a bunch of API callback prototypes
11) simplify handling of HUP poll() events

Yes, i know, it's usually better to commit a lot of small patches instead of a
single big one. In this case however, this would have contradicted the other
rule: never commit broken or incomplete stuff.

*** This stuff needs a lot of additional testing! ***


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@511 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/polypcore/llist.h

@@ -66,4 +66,14 @@
                                     _item->next = _item->prev = NULL; \
                                     } while(0)
 
+#define PA_LLIST_FIND_HEAD(t,item,head) \
+do { \
+    t **_head = (head), *_item = (item); \
+    *_head = _item; \
+    assert(_head); \
+    while ((*_head)->prev) \
+        *_head = (*_head)->prev; \
+} while (0) \
+
+
 #endif