@sev- had asked why these flags were added a while ago (I had been
instructed this was the right thing to do when I asked in the past)
and ever since then it has been bugging me more and more that they
are there, since they serve zero purpose except to make the game ID
longer. In the past, it may have been the case that the SCI16 &
SCI32 code mixing meant that SCI32 games needed the CD flag for
things like managing subtitles, but at this point the only use of
the CD flag within the SCI32 engine is for the few games that
actually have different CD and non-CD versions. So these flags are
gone now.
Real MIDI devices, and MT-32 in particular, need delays between
SysEx messages to ensure sufficient time to receive and process
the incoming data buffer. Sending too much data too quickly to
these devices can cause them to crash with a buffer overflow.
The MT-32 emulator, on the other hand, has no problem receiving
SysEx data instantly, so skipping the delays means that games that
send lots of data to the MT-32 will start up much faster.
InputDeviceManager::pumpEvents is called from neighborhood classes that
are destroyed when loading.
Don't allow loading from that method to prevent use after free bugs.
Fixes a crash to debugger in the following case:
- TSA: Select he Pegasus biochip. The recall button is disabled.
- Select the gas canister in the inventory
- Jump to Norad VI
- Press T to show the Pegasus biochip. The recall button is still
incorrectly disabled. Clicking on it triggers an error.
This mixer type was added in
943b4c2036 because "anything which
produces sampled data with high latency (like the MT-32 emulator)
will sound terribly", but as far as I can see (or reproduce), this
mixer doesn't do anything that would solve that problem, except
that it effectively doubles the size of the audio buffer so there's
less chance of an underflow due to slower-than-realtime synthesis
by the softsynth. But you don't need the overhead of a separate
thread to do that, you just need to increase the buffer size.
If it turns out that everything that had previously been fixed by
this manager is broken by this change, everything that had been
fixed probably could have been fixed by just increasing the audio
buffer size in SdlMixerManager. :\
The previous default buffer size of 4096 samples for 44kHz mixer
would add up to 93ms of audio latency, which is fine for early
adventure games, but this is significantly more latency than is
acceptable for games with full motion video. For these games,
the latency needs to be kept within roughly +15ms and -45ms of
video frame presentation to avoid lip sync problems. With this
change, the default audio buffer size is calculated to be 1024
samples at 44kHz (which happens to match what DOSBox uses).
There is a possibility that the reduced latency may cause issues
that did not previously exist with things like the MT-32 emulator,
where a larger buffer size allowed for a larger window where
high-complexity synthesis that could not be generated in realtime
could be balanced out by low-complexity synthesis that could be
generated faster than realtime. In this case, rather than
increasing the system mixer buffer size again, please move the
MT-32 emulator into its own thread and give it its own larger ring
buffer into which it can generate more sample data in advance,
independently from the rest of the audio system.
For other systems where this buffer size reduction might cause a
problem with audio drop-outs, a new audio_buffer_size
configuration option has been added to allow users to tweak the
audio buffer size to match their machine's ability to generate
audio samples.
Fixes Trac#10033. Also improves playback of samples in SCI that
were programmed to restart across several consecutive frames,
relying on lower audio latency in the original engine for this to
not sound bad, like the hopping sound at the start of chapter 1
of KQ7, and the sound of turning on the power in the digger train
in the Lighthouse volcano.
Removing this GUI control was suggested as far back as 2011 at
<http://lists.scummvm.org/pipermail/scummvm-devel/2011-November/010416.html>.
There were no objections, but it was never removed. When working
on audio latency bugs, I independently rediscovered that the GUI
option was broken: the per-game options would *never* work, and the
option would not take effect until ScummVM was restarted because
there is no API for interacting with the backend audio mixer. So
now, it is finally gone.
Primarily for the sake of future troubleshooting, configurability
of the audio sample frequency within SdlMixerManager is maintained
for the moment, but now users will need to edit their ScummVM
configuration file manually to change it.
OpenGL backends don't always support the pixel format that is
returned by the Indeo 3 decoder when playing the GK2A.AVI from the
GK2 demo. If this happens, use the backend's preferred pixel format
and convert in software.
If a backend doesn't support any 16-bit or 32-bit format, the
playback code will error out. This is probably fine, since there
are not really any of those any more.
Fixes Trac#9994.
_hwscreen is always initialized to 16bpp so the supported 32bpp
pixel formats would never be put into the list of supported pixel
formats, making it useless for engines to query for usable 32bpp
pixel formats.
This patch changes things so that the native desktop pixel format
is at the top of the supported formats list, and all pixel formats
<= the default desktop pixel format will now show up in the list
of supported formats. ("Supported" is somewhat of a misnomer here
since there is no hardware querying beyond checking the default
desktop pixel format. SDL generally accepts a wide variety of pixel
formats and tries to convert them to whatever the hardware
supports.)
This is an attempt to fix a compilation error on some platforms.
The error message seems to indicate that log2 might be a define
on thos platforms.
Note that the log2 implementation in ModuleModXmS3m is not the binary
logarithm, and we cannot use Common::intLog2.
In commit f0581bab4a the index value
for the array was changed from a constant to a variable, but uint8
is too small to contain 293, so this value was ending up as 37.
Colin Snover
stevenhoefel
Paul Gilbert
Thierry Crozat
Bastien Bouclet
Simei Yin
Lothar Serra Mari
wreednumero2
Ben Castricum
Cameron Cawley
Torbjörn Andersson