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This improves readability a lot and prevent us from reinventing the wheel.

Missing some cases that I could not test.
Also ffmpeg/chroma.c is locked, so I can but leave it broken.
Fix is for the remaining modules is obvious and the issue is easy to detect.

* Headers in include must contain the structures and prototypes needed
  by the plugins and should be named vlc_*.
* Headers in include/vlc must contain the structures and prototypes
  needed by external libvlc clients

* Moved and renamed some things in headers. 
   - Removed vlc_cpu.h, vlc_error.h (merged in vlc_common)
   - Removed snapshot.h (merged in vlc_vout.h)
   - Removed vlc_spu.h (merged in vlc_osd.h)
   - Removed intf_eject.h and vlc_interaction.h (merged in vlc_interface)
   - Moved all internal headers to src
   - Merged vlc_video.h and video_output.h and move private things to src
   - Removed vlc/intf.h, vlc/aout.h, vlc/vout.h, vlc/decoder.h and vlc/input.h
     (meta headers for use in modules, and often implying too large 
     dependencies)
* Removed some useless dependencies
* Unexported a bunch of functions and structures used only in src/
  (--> Still some work here)
* Finally made input_thread_t and input_source_t (mostly) private. 
  Added input_GetItem to fetch the input_item of an input_thread
* Cleaned up deprecated entries in vlc_symbols.h and bumped up symbol 
  prefix

This commit has a 99% probability of breaking the build, 0.1% of killing
your cat and 0% of getting you hot chicks.

    paved the way for private SPU commands.

(da big courmischage)

* Each module can declare a "human-readable short name" with set_name
* Modules are sorted by category (set_category, set_subcategory).
  Modules configs can be separated by set_section()
* Separated audio-filter and audio-visual
* Separated extraintf and control
* New command and widget : add_module_list() for comma-separated modules
* Vfilters now use "," as separator

  (expect some breakage).
* modules/video_filter/blend.c: new alpha-blending module.

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.

  Vobsub is working now. only track 0 will be played atm.
  spudec scaling will need to be implemented or vobsub is pretty useless.
* modules/codec/spudec
  Changed an error into a warning message.

 as vlc/vlc.h include them).

  -> i_rate isn't used for now : it will need to be fixed.

* ALL: final improvements to the decoders/packetizers api.
   (There are still a few decoders/packetizers left to be converted but this shouldn't take too long).
* ALL: small improvements to the encoders api.

          things to write to implement competely the standard but this decoder
          will work in most of the pictures subtitles cases. Text subtitles
          decoding is not implemented at all.
          This decoder has been validated with CAVENA encoders after few
          remarks of their developpers.

include/*: addded a p_spuinfo field in the decider_fifo_t and the
           es_descriptor_t

codecs.h: added a dvb_spuinfo_t structure to identify the id of the selected
          track.

modules/demux/mpeg: added the support of the dvb subtitles track. Need last
                    libdvbpsi (0x59 descriptor) to compile. The demuxer
                    creates n fake ES as each ES carries up to 256 subtitles
                    tracks.


This work is part of the work done by Anevia for the "Gran Theatro del
Barcelona".

* ALL: Introduction of a new api for decoders.
   The final aim of this new api is to make it possible to use the decoders from other modules like the transcoder for instance.
   Only a few decoders have been ported to the new api (a52, libmpeg2, dts, vorbis, theora) so the old api is still supported.

   Don't hold your breath, there is still much work to do before we reach this goal.

* modules/codec/a52.c, libmpeg2., dts.c, vorbis.c, theora.c:
   Converted to the new api.
   Merged the a52 and vorbis packetizers in their respective decoders (removes a lot of code duplication).
   New dts and theora packetizers (merged in their respective decoders).

  - Removed all the RLE subtitle font code.
  - Removed the .rle and even older .psf font files.
  - Moved the filesubtitle code from spudec to subsdec.
  - spudec is again DVD only.

* modules/codec/spudec/spudec.c: disabled RLE font loading as it's not used anymore.

* modules/codec/spudec/spudec.c: oops, proper fix for the proper initialization of the proper iconv handle ;)

* modules/codec/spudec/spudec.c: proper initialization of the iconv handle.

All: My shot at improving subtitle rendering in vlc. Now each vout uses a "text renderer" module to render text on the video when needed. I decieded to make this a module type, because other api's (win32 and macosx) is supposed to do better than freetype under some circumstances.

include/video_output.h: added some members needed by text renderer modules
src/video_output/video_output.c: load and unload text renderer module when needed
src/video_output/video_text.c: implemented some functions to show text on the video
include/osd.h: exported the functions to show text
modules/misc/Modules.am, module/misc/freetype.c: new text renderer module, largly based on the old osdtext module.
modules/video_filter/Modules.am, modules/video_filter/osd_text.c: removed the osdtext module
configure.ac: changes "osdtext" to "freetype" some places
modules/codec/spudec/*: when iconv is available, use it to convert textual subtitles from the encoding given by --sub-encoding to utf8. Use new code to render subtitles
modules/control/lirc/lirc.c: use new code to give feedback on buttons pressed. untested.
modules/demux/util/sub.c: remove all traces of the ugly old osdtext module
modules/misc/dummy/*: added a "text renderer" submodule in the dummy module
src/misc/modules.c: included osd.h as it seems to be needed to export symbols


final notes: you need to give a proper value to --freetype-font. This should be the path to a font file freetype2 can handle (almost any format afaik) with a unicode translation table in it. Windows ttf files will do. In linux at least openoffice distributes some fonts that work. I think macosx and beos also has useable fonts.

* ALL: Capitalize all preferences text strings

* modules/*: sanitization of the modules description strings.

indicate wether it is an "advanced" option or not. The goal with this is to
hide the user from all the strange options that very seldom needs to be
changed. added an extra argument to all the add_* macros to indicate wether
the item is advanced or not.
* src/libvlc.h: added an "show advanced options" config option default
disabled
* src/libvlc.c: the advanced options are not listed by vlc --help and
friends unless --advanced is used
* modules/gtk/preferences.c: the gtk/gnome preferences dialog don't show
advanced options unless advanced is set
all: set the advanced flag to VLC_FALSE or VLC_TRUE for all options, by
using some common sense. Please check and correct

note: All interfaces should still work like they used to, see the change in
modules/gtk/preferences.c to find out how to "hide" options.

second note: I think I've changed all the modules, but I could not test
everyone for compilation, expect some broken modules (the fix is to add ",
VLC_TRUE" as last argument to the add_* I forgot)

    directory whenever possible, to use it for the spudec font or to load
    plugins.

* modules/codec/spudec/spudec.c, modules/codec/spudec/text.c: fixed the
   race condition between spudec and vout. This patch may not be all that
   nice because it does a lot of vlc_object_find() but it is the only
   solution I've been able to come-up with.
   Oh and I didn't fix the memory leak caused by the font when using text
   subtitles. If the vout changes while the spudec is running then we don't
   unload this font.

    has been overriden by the user (Closes: #79).
  * ./modules/access/dvd/access.c: renamed "dvd-css-method" to "dvdcss-method".
  * ./modules/*: fixed a few capitalization issues.

 previous commits (closes #100)

    the GetProgramPath call, stored the path in p_libvlc instead. Fixes
    compilation under anything other than OS X.

* modules/codec/spudec/*: modified the spu decoder to handle text subtitles.
   Only one format of text subtitles is supported right now but we should be able
   to expand this by modifying modules/codec/spudec/text.c.
   Most of this work comes from by Andrew Flintham ( thanks a bunch Andrew :).

* share/font-eutopiabold36.rle: new font for the text subtitler, courtesy of
   Andrew Flintham.

* AUTHORS: added Andrew Flintham to the authors file.

* modules/demux/ogg.c: modified the ogg demuxer to handle subtitles.

* modules/codec/ffmpeg/*: modified the ffmpeg decoder to always keep the last decoded
   frame linked.

  * ./modules/codec/spudec/parse.c: implemented subtitle cropping and
    temporarily disabled subtitle cropping.
  * ./modules/codec/spudec/render.c: split RenderSPU into chroma-specific
    functions.