- Set the flag when the buffer is marked.
 - Set the flag (for next buffer) when the buffer is dropped.
 - Clear the flag when a buffer is played.

The filters chain will convert to whatever output format is needed, so
this was redundant.

This uses the old 0.12 buildsystem with regex.* from glibc 2.2.5
and uses LGPL

Modified-by: Edward Wang <edward.c.wang@compdigitec.com>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Re-license almost all the playback modules to LGPLv2.1+ with
authorization from their respective contributors (230+)

This includes:
 - access, codec, packetizers, demux
 - audio filters, audio mixers, audio output
 - video filters, video chroma, video output
 - text renderers
 - XML parser
 - ARM NEON and SSE2 optimisations (mostly for chromas and filters)

Some modules are not concerned:
 - BDA and DShow access modules because Manol Manolov is AWOL
 - Real RTSP, because it is derived from Xine
 - x264 and t140 because they are encoders only
 - DLL Loader, because it is derived from MPlayer
 - DTS packetizer, because Jon Lech Johansen is AWOL
 - Shine and WMAfixed, because they are derived from Rockbox
 - Real demuxer, as it is derived from MPlayer and Wang Bo is AWOL
 - MPC demuxer, as Yavor Doganov is AWOL
 - Tivo demuxer, because it is derived from an MPlayer fork
 - Playlist demuxer, (WPL and ZPL parts missing), because suheaven is AWOL
 - iOS audio output and video display, because author refuses the license change
 - Equalizer and compressor, because Ronald Wright is AWOL
 - Mono, Headphone and Dolby, because author refuses the license change
 - hqdn3d and yadif, because they are from MPlayer/libavfilter
 - remoteosd, because it derives from RealVNC code
 - MMX optimisations, because Ollie Lho, from SiS, is AWOL
 - Rotate, because it depends on GPL motion

Nota Bene:
 - Some modules depend on GPL-only libraries, a LGPL module does not mean
   that the resulting binary module will be LGPL.
   Libraries affected would include liba52, libdvdcss, libdvdnav, libdvdread,
   faad2, libdca, libmad, libmpeg2, libpostproc, SRC, sid, zvbi and probably others.

Close #7282

new vlc_path2uri function now expects a valid not-yet-converted file name.

This fixes art display errors with latest vlc from current git rep.

This commit will kill your kitten if left without supervision.

And comments

__GCC_HAVE_SYNC_COMPARE_AND_SWAP_ is neither defined nor is an equivalent macro available. However, the protected features are supported.

This leaves only synchronization code in input.c. This patch introduces
a small regression where resampling adjustment have a latency of two
packets instead of currently one. That will be fixed later.

The number of channels is conveyed in the channels mask.

Close #7739