Trying to find differences in Lighthouse's audio sample playback,
I discovered that SCI3 had its own variant of handling volumes and
sending this volume information back to game scripts. It is not
known if this fixes any sound bug.
Which were originally only played, when using the Windows interpreter.
Afaik the DOS interpreter was incapable of playing more than 1
sample at a time, which was probably the reason why Sierra only
added these for the Windows interpreter.
For example a sample is now played, when points are awarded.
Those samples are currently used all the time and will also
enhance the game, when platform DOS is chosen.
In case someone wishes to opt-out of this, we could add a game
specific option.
We do something like this for Space Quest 3 already,
that's why I don't see a reason to add a game option right now.
This fixes at least the character selection screen in QFG4CD,
where the sound for the torches is supposed to loop, but wasn't
because kDoSoundSetLoop would bail out before setting the loop
property on the soundObj.
Upon investigation of Sound code across SCI32 games, it was
determined that there are actually (at least) 3 different
revisions, not just a single SCI2.1 version. This patch only
changes the parts of Sound code that are relevant to the correct
use of Audio32.
Fixes Trac#9736, Trac#9756, Trac#9767, Trac#9791.
This patch includes enhancements to the ScummVM integration with
SCI engine, with particular focus on SCI32 support.
1. Fixes audio volumes syncing erroneously to ScummVM in games
that modify the audio volume without user action (e.g. SCI1.1
talkies that reduce music volume during speech playback). Now,
volumes will only be synchronised when the user interacts with
the game's audio settings. This mechanism works by looking for
a known volume control object in the stack, and only syncing
when the control object is present. (Ports and planes were
researched and found unreliable.)
2. Fixes audio syncing in SCI32 games that do not set game
volumes through kDoSoundMasterVolume/kDoAudioVolume, like GK1,
GK2, Phant1, and Torin.
3. Fixes speech/subtitles syncing in SCI32 games that do not use
global 90, like LSL6hires.
4. Fixes in-game volume controls in SCI32 games reflecting
outdated audio volumes when a change is made during the game
from the ScummVM launcher.
5. Fixes SCI32 games that would restore volumes from save games
or reset volumes on startup, which caused game volumes to be
out-of-sync with ScummVM when started.
6. ScummVM integration code for audio sync has been abstracted
into a new GuestAdditions class. This keeps the ScummVM-
specific code all in one place, with only small hooks into the
engine code. ScummVM integrated save/load code should probably
also go here in the future.
Fixes Trac#9700.
This provides a complete implementation of kDoAudio through
SCI2.1mid, plus partial implementation of SCI3 features.
Digital audio calls shunted through kDoSound have also been
updated to go through the SCI32 audio mixer, though these shunts
are a bit hacky because the ScummVM implementation of kDoSound
does not currently match how SSCI kDoSound is designed.
It is probably possible in the future to just replace the SCI1.1
audio code (audio.cpp) with the new SCI32 code, since the major
differences seem to be that (1) SCI1.1 only supported one digital
audio playback channel (this is configurable already), (2) it
had extra commands for CD audio playback and queued sample
playback.
The demo versions of these games were using a very different engine -
SCI1.1 vs SCI2/SCI2.1. Thus, we split them into different game IDs,
to avoid mixing specific game checks for them, as well as specific
game workarounds, which are different for the demos than the full
versions. Also, the demos should be working when SCI32 is disabled.
For these games, we don't use ADGF_DEMO, to avoid game IDs like
foodemo-demo
SCI1 sound resources can have an embedded priority. We now use that by
default, unless an explicit DoSound/SetPriority call overrides it.
Thanks waltervn.
This fixes relative priority of songs in at least PQ3 room 29.
Also increase savegame version to 33.
it seems that sound system up till SCI0_LATE uses int16, afterwards it seems they changed to byte
main music object (conMusic) in Laura Bow 1 uses -1 as priority. This was truncated to 255 till now, which resulted in many sound effects not getting played, because those used priority 0
SCI: Only stop after fading, if the song to be faded is faded down. Also,
reset the song signal when fading starts. It was set to -1 when fading
started in bug #3267956, thus it stopped immediately.
We now accept signals from all channels if channel 15 is missing. This
is a very rare edge case, but our behavior is now somewhat closer to what
the original interpreter seems to be doing. Mordack's appearance animation
is now synced properly. The more generic workaround works for songs 1840
and 1843, but not for 1849, which is still problematic and we still resort
to manually changing its dataInc selector
Filippos Karapetis
Colin Snover
Martin Kiewitz
Ori Avtalion
Willem Jan Palenstijn
Matthew Hoops
Johannes Schickel