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 (becarefull, it's just if you can seek or not, and not if you have to
 display the progress bar, for thet last you have to check if "position"
 value get != 0.0 )
       - added "audio-delay" and "spu-delay" object variables to delay
 audio/spu to the video. They can be changed on the fly (untested).
       - renamed INPUT__GET/SET_SUBDELAY into
 INPUT_SET_SPU_DELAY and added INPUT_SET_AUDIO_DELAY
 (wrapper to "audio-delay" and "spu-delay")
 - readded INPUT_ADD/GET_INFO/INPUT_SET_NAME. Becarefull to not over-use
them, a demuxer should export DEMUX_GET_META and not using them.

When you want to use OSD, you have to register an OSD channel, by calling
vout_RegisterOSDChannel, then pass it to vout_CreateSubPicture.
There is a particular channel, DEFAULT_CHANNEL that can be used for
general purpose.
See modules/control/hotkeys.c for an example.

 * modules/control/hotkeys.c: don't display OSD slider if stream is not seekable, when pressing 't' hotkey. 

* added i_channel and i_content properties to subpicture_t
* p_last_osd_message is no more used

An OSD channel can contain simultaneously an OSD text and an OSD widget.

* modules/control/hotkeys.c: check if there is a vout before writing some OSD, since hotkeys can also be called from an interface now.
* modules/gui/ncurses/ncurses.c: don't add empty ('') entry, in the open function

* src/video_output/video_widgets.c: Added OSD sliders when changing volume or position with hotkeys.
Those sliders are graphical (ie not written with characters) and we can now add others OSD "widgets".

sometimes not display, although it was known.

   coding style changes

 * REST: remove code duplication in some places. there might be more locations.

* src/input/input.c:
   + introduced input_item_t that is shared between the playlist/vlm and the input thread (contains input name, options, infos, etc...).
   + changed prototype of input_CreateThread() to input_thread_t *input_CreateThread( vlc_object_t *, input_item_t * ).
* ALL: use input_item_t and INPUT_ADD_INFO when necessary.

* Allow to modify subtitle delay on the fly and implement hotkeys 
  (h and j)

* When framerate is available with subrip, use sub-fps to make corrections
  (sub-fps default value is now 0, if left to this value, 25fps will be
   assumed in microdvd mode and no correction will be applied in subrip)

Main problem is that when seeking in the subtitles, you easily get
several of them displayed. Maybe we could add a flag to subpicture_t,
like SUBTITLE_PICTURE to say that only one of them must be displayed at
a time, but that other subpictures (OSD, ...) can remain present on the
screen at the same time.

* fix broken vout_OSDMessage in other files

* added hotkeys Fn and COMMAND+Fn, whith 2 <= n <= 8
* bookmark9 and 10 are not added since F9 and F10 are reserved keys

  (using CTRL+Fn)
* only F1 and COMMAND+F1 are defined for OSX (I let those developpers
  chose their keys)
* Currently the medias assigned to Fn are not saved in vlcrc if they
  have been assigned with Ctrl+Fn. But they are, if assigned via the
  preferences panel.

 * hotkeys: never _never_ use  demux_Control outside of src/input/ (it's
 completely broken,  there is a lot  more things to do),  all interfaces
 have  to  use  var_Get/Set  (time(-offset),  position(-offset),  state,
 rate(-slower|-faster)...  ).
 Btw,   input_SetStatus,   input_Seek,   input_Tell,   input_ChangeArea,
 input_ToggleES,  will   be  quickly   obsolete  and   removed(at  least
 unavailable for intf), so we should convert remaining interfaces (ie all
 except wx, osx, rc, http, hotkeys).

 * avi: implemented DEMUX_SET_TIME (not yet used).

* modules/control/hotkeys.c: use demux_Control( p_input, DEMUX_SET_TIME, ...) to seek, for better precision.
* modules/video_output/directx/events.c: fix to catch the Alt key.

  location by any module.
* added a OSD config option to the Video options. this will allow you to disable
  the messages printed by OSDMessage. Subtitles will still be shown however.
* src/audio_output/intf.c: volumeSet sets the intf-change variable.
* modules/gui/macosx/vout.m: fix the modifier detection.

* modules/control/hotkeys.c, src/libvlc.h, include/vlc_keys.h: added hotkeys for jump actions.

  And this is no final solution, i think it should be handled in VLCApplication.

* ALL: improved hotkeys support.

 * created a variable "key-pressed" in p_vlc that can be used to
   report or read key presses
 * allways try to start hotkeys interface in the background
configure.ac, modules/control/Modules.am, modules/control/hotkeys.c:
 * a new control module that reads keypresses from "key-pressed" and
   performs an action depending on what is asosiated with this key.
   Also uses nice on screen messages to indicate what action was performed
modules/video_filter/filter_common.h:
 * removed code to pass old style key reporting through filters
modules/video_output/x11/xcommon.c:
 * report key-presses through the new mechanism. Incomplete, I need help
   with this.