Also refactor. Deletion and loading are now distinct functions.

Note that CLOCK_FREQ is already a 64-bits integer, so the cast to
mtime_t is not needed (anymore).

This uses the PulseSupport class from phonon to allow use to support
PulseAudio nicely (e.g. nice device listings etc.)
(cherry picked from commit bf1ef7158347153310cf4644a66da14f85db38c9)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

It still fails pseudo-randomly.

This reverts commit ec468212.

Conflicts:

	modules/gui/qt4/qt4.cpp
	modules/video_output/msw/events_vo.c
	modules/video_output/x11/xcommon.c
	modules/video_output/xcb/common.c
	modules/video_output/xcb/window.c
	src/video_output/window.c

* modules/codec/cc.h (cc_Extract): Merge repeated field (3) with first
field (1).  Use the TOP_FIRST_FIELD in the determination of field.
* modules/codec/libmpeg2.c (DecodeBlock): Pass whether "top field first"
* modules/packetizer/mpegvideo.c (ParseMPEGBlock): Likewise.
Signed-off-by: Laurent Aimar <fenrir@videolan.org>

It was broken as soon as a linked list of buffers was pushed.

 It factorizes the common code and implements all conversions between s8, u8,
s16l/b, u16l/b, s24l/b, s32l/b and fl32 (close #3162).
 In cases a direct conversion is not implemented, s16 is used as the middle
format.
 The following direct conversions have been removed: fl32->s24, fl32->u16, u16->fl32.