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Include by used library, not by backend
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See https://github.com/scummvm/scummvm/pull/12 for more information.
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This renames setMuteForSoundType to muteSoundType and getMuteForSoundType to
isSoundTypeMuted.
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(Mirroring the new adpcm_intern.h file)
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This also adapts our default implementation MixerImpl to handle the newly
added flags properly.
Now we do not need to set the sound volume for all types to 0, in case we want
to mute them, but instead just set the mute flag for all types to true. This
allows engines to be a bit more agonstic about mute support, when it comes to
volume options etc. since they can just setup any volume they like, but are
still muted (and thus will not break muting anymore).
MIDI sound is of course not affected by this.
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Conflicts:
video/qt_decoder.cpp
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IMA is really just the definition on how to decode a sample from a nibble, DVI is just a way for those nibbles to be stored in the stream.
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There are tons of ADPCM variants out there, and it is impractical to
stuff them all into a single adpcm.cpp file. By exposing the internals,
engines can implement their ADPCM decoder variants more easily.
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MPEG-4 seeking was broken while QuickTime seeking was extremely slow. All is fixed now
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MKID_BE relied on unspecified behavior of the C++ compiler,
and as such was always a bit unsafe. The new MKTAG macro
is slightly less elegant, but does no longer depend on the
behavior of the compiler.
Inspired by FFmpeg, which has an almost identical macro.
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Standalone QuickTime files can now be played as an AudioStream
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Instruments are now not reset to the grand piano due to trailing
zeroes.
Thanks to waltervn for noticing this.
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Based on the SONiVOX® Embedded Audio Synthesis (EAS™) library, which is
part of the base Android OS.
CPU stats (Cortex A8 1GHz, monkey1 intro, peak values):
MAME OPL: 30%
DosBox OPL: 26%
EAS: 19%
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This also should fix some regressions from the previous
commits, related to MidiParser's either being leaked,
or being deleted and then used again (i.e., crashing).
I tested as many games as I had available, but further
testing of all affected engines is called for anyway.
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This code is currently not complete, but contains enough code to
allow several engines to switch their pseudo MidiDrivers to be
based on this class, greatly reducing code duplication.
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The actual MidiDriver derives from it. MidiDriver_BASE only
provides the minimal API necessary for transmitting MIDI data.
The idea is that this is all MidiParser needs, thus allowing
us to simplify the various MidiPlayer classes in our engines.
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This in turn enables modifying MidiDriver_MPU401::close() to allow
it to be called on a midi driver that has not yet been opened.
The specific issue that triggered me to make these changes was a
crash-upon-quit in HUGO, caused by it instantiating a midi driver,
then encountering an error (missing hugo.dat) *before* having
opened the new midi driver; the general cleanup code then tries
to close the (not yet opened) midi driver -> kaboom
Also fixed some engines which were leaking MidiDriver instances.
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Is it just me or is overwriting-but-not-marking-as-virtual
irritating?
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Tip of the day: git grep -w PI
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The ARM specific rate converters work with 8bit volume vars. Limit
volumes to 0xff to prevent crackling.
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The RateConverter::flow result was never used, pipe it through
Channel::mix to MixerImpl::mixCallback, so backends can decide
if they want to waste cpu cycles while playing empty buffers.
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