This does some refactoring to make it possible to cimpile and run FSO
without needing to link to FFmpeg. Since that eliminates support for
cutscenes or sound this is mostly useful for running a standalone server
which has no need for this anyway.
This reduces the image size of the standalone Docker image to only 20MB
and also resolves any licensing issues that might have existed.
The Z coordinate, from negative to positive, means "front to back", so a Z value of 1.0 (with relative playback, which is what 2D sounds use) means "as far back as possible", i.e. the rear speakers. It's hard to know if this was intentional or not, but feedback from an actual user with a surround setup is that the opposite is preferable.
This is similar to the other changes I already posted. Here the sound
instance handles are converted to their own handle type which will make
it easier to use the sound API.
This adds support for specifying multiple sounds for a single game sound
entry. The engine then selects which sound will be played based on the
strategy provided by the game data. This required a few changes to some
of the game code since previously every game sound had exactly one sound
file attached to it. The most notable change is that it is no longer
possible to determine the exact duration a sound can have so instead the
new code computes the maximum duration a sound can have and uses that
where appropriate.
This also adds support for randomizing the pitch and volume of the sound
to provide a more varied experience even if only a single sound is used.
One possible issue that exists is that the "sequential" strategy only
works globally at the moment so if two sources use the same game sound
concurrently then the two sources will share the sequence of sounds
since there is no sound instance data at the moment. That can be added
in a future change but should not present a huge issue for most
use-cases.
Visual Studio on Appveyor somehow causes deprecation error on _our_
definition of vsprintf. I have no idea why these changes introduced this
warning but I won't debug Visual Studio compiler bugs that I can't
reproduce with my Visual Studio version so I just disabled those
warnings.
This expands the existing system which only worked on Windows to all
supported platforms.
If the MSVC debug runtime is not present then its behavior is emulated
by adding a header to each allocated memory block.
Add support for enhanced in-mission sound, with 128 audio channels and a
new system for specifying per-sound priorities and concurrent playback
limits using modular extensions of soudns.tbl.
+F -donotenforce = to turn off concurrent playback limit for sounds.
+F -percent_flashtobang = sets the default percentage of nebula flashes get converted to bangs. Default is 50, max 100, min 0.
+T lightning.tbl +flash_to_bang_percent: = sets the percentage of nebula flashes that get converted to bangs for the storm type.
-- Audio gain of OpenAL is set to 65% of max.
Goober5000