Some devices fail to resample uncommon rates (like 22050Hz).

Fixes #14514

This fixes aout_update_format and vout_update_format.

AVCodecContext callbacks can also be invoked then.

move audio unit initialization after audio session initialization and setup fixes issues when trying to start playback from background
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

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

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

Signed-off-by: Francois Cartegnie <fcvlcdev@free.fr>

static live with template+timeline never ended

otherwise splits are overriden by default segment

also fixes includes, forward declarations

Indeed, C99 doesn't have static_assert and C++11 has it.