Previously, we always loaded entire videos in memory before playing them.
`libsmacker` does not provide a streaming API but it does provide a
`FILE *` file pointer API.
We now take advantage of the `FILE *` API by streaming the videos on
platforms that support `fopencookie`.
This means faster startup and less memory usage on these platforms.
This option completely disables all audio handling, including audio
loading code and dependencies.
Dialog text length is estimated to be somewhere between
Cain and Griswold speed.
SDL_mixer can only stream a single music track
SDL_audiolib has unlimited streams.
With this change, we finally have streaming sounds (respecting
sfx_STREAM).
Audio options can now also be set via diablo.ini, which should help us
better diagnose the static noise issues.
Older Debian and derivatives come with sdl2-config.cmake file that does
not define any targets.
One such sdl2-config.cmake looks like this:
```cmake
set(prefix "/usr")
set(exec_prefix "${prefix}")
set(libdir "${prefix}/lib/x86_64-linux-gnu")
set(SDL2_PREFIX "/usr")
set(SDL2_EXEC_PREFIX "/usr")
set(SDL2_INCLUDE_DIRS "${prefix}/include/SDL2")
set(SDL2_LIBRARIES " -lSDL2")
string(STRIP "${SDL2_LIBRARIES}" SDL2_LIBRARIES)
```
Works around this by defining an `SDL2::SDL2` target ourselves.
1. Cleans up SVidVideoMode detection.
2. For devices where detection is not possible but it is known
to work, adds an `SDL1_FORCE_SVID_VIDEO_MODE` define.
Unfortunately, OD Beta has a major regression with SDL joystick support,
as it always reports buttons as keyboard keys instead of actual buttons.
This partially breaks external keyboard support, where e.g. space no
longer acts as expected.
However, on balance, OD Beta is better than the 2014 firmware at this
point.
There is no reason for these functions to be in the header (inlining
won't benefit them one bit).
I put them in the header originally only because of the weird state
SourceS was in back then.
Gleb Mazovetskiy
Anders Jenbo
Mathieu Maret
Xadhoom
obligaron
Ivan Epifanov
thebigMuh
Jmgr
John Törnblom
Jonathan Mercier-Ganady
Trihedraf
thebigMuh
Michael Saunders