It seems necessary for ATI(?) dxva2 support.

It should fix the performance issue with ATI hardware.

While -confusingly IMHO- libvlc_media_player_pause() toggles the pause
state, libvlc_media_player_set_pause() sets it.

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Currently, the muxer generates invalid files whenever any streams
with  non-PCM codecs are used as input. This is fixed by adding a few
additional waveformat tags to the wave_format_tag_to_fourcc table and
using the fourcc_to_wf_tag utility function.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

CVE inside.

file descriptor number is not a file path

Core functions and singleton media library object

The thread can be canceled when owning a block_t, so we must push a way to clean it up.

This closes #3793 and #3779

Adds a JPEG 2000 fourcc and hooks it up to the libavcodec decoder.
Also add an alias to 'mjp2' which is used to pack JPEG 2000 in MOV
by Final Cut Pro etc.

reverts 0455f985 and 7cdb0761