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Previously, _topNibble was not reset at the beginning of a new
audio block, and the alignment byte at the end of odd blocks was
being read as audio data, which caused audible clicks and
out-of-bounds sample generation. There may have also been read
errors related to the use of continue/break keywords inside of a
macro wrapped with do-while(0).
The introduction of partial block reads in this code when it was
converted from ffmpeg to a ReadStream interface was also confusing
and somewhat inefficient (calling SeekableReadStream::pos
frequently), so this code has been refactored for clarity and to
improve efficiency by reducing the number of virtual calls. Error
detection has also been improved somewhat by ensuring that there
are enough bytes to read a block header, and that the step indexes
in the header are within the valid range.
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All users of BitStream were in fact using a specific, hardcoded variant,
so we can hardcode that variant, removing the need for virtual calls,
and enabling inlining.
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GCC did not warn about these, but surely it should be bitwise OR,
not logical OR, here as well. But I don't think I have any game that
uses MaxTrax (Amiga version of Legend of Kyrandia?), so I can't
really test this.
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I think these are the last one that were already flagged as being
deliberate.
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This update uses upstream commit
777c51cdb4dbb4e02a53c23edea9086f0b600e26.
The new SampleRateConverter is added, but not built as we don't use it.
Also, building it without source changes will need additional include
directories.
This update of Munt reduces the stack size, and thus fixes bug #9630.
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This update uses upstream commit
f88ef828a600ce66d1f730c8fb2a7f580f6f6165.
This update switches to use the new Munt C++ interface, which
will allow ScummVM to link to an external Munt library instead
of requiring it to be built-in in the future. For the moment,
the emulator is still built-in, since it is not available from
most package repositories.
The Munt driver in ScummVM now uses writeSysex instead of the
(now-private) playSysexWithoutFraming, per recommendation from
the Munt team <https://github.com/munt/munt/pull/30>.
This changeset also removes direct modifications that used to be
made to Munt code, to ease future updates. To update Munt code in
the future:
1. Replace all source files in the `softsynth/mt32` directory with
new files from the upstream `mt32emu/src` directory;
2. Update `config.h` with the correct version number for the new
version of Munt;
3. Update `module.mk` to add any new source files that need to be
built.
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This reverts commit b4dbd6d3c275097b4be964b7da4478ff930cbaa7.
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This changeset also removes unnecessary direct modifications to
Munt code to ease future updates. To update Munt in the future:
1. Replace all source files in the `softsynth/mt32` directory with
new files from the upstream `mt32emu/src` directory;
2. Update `config.h` with the correct version number for the new
version of Munt;
3. Update `module.mk` to match the list of sources given in
`mt32emu/CMakeLists.txt libmt32emu_SOURCES`.
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This fixes the audio in the intro AVI movie for German Fullpipe.
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The CMS emulation assumes the chips run at 8 MHz clock,
but in PCs they run at 7.15909 MHz, so the emulated pitch
is too high. Adjusting the requested sampling rate higher
by matching amount the pitch is lowered down to normal.
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This is needed for playback of Starship Titanic speech data
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Since _decodedSamples[] is filled with either 2 or 4 samples, we
can't use 1 - (count - 1) to "ensure that acts as a FIFO". When
we have 4 samples, that index will become negative, putting
uninitialized data into the buffer.
We could still use a similar trick, but I think it's much clearer
to use an index variable like this. We need an addition variable
either way.
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This allows raw PCM in WAVE containers to have duration and be
seekable, and opens the door for ADPCM streams to be seekable later
if necessary.
This change is needed to avoid duplication of RIFF/WAVE container
parsing for SCI engine, which uses raw PCM WAVE files and needs to
be able to determine their lengths.
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Since it was --voice, we were reading element index -1.
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This fixes the Indiana Jones and the Fate of Atlantis specific issue reported
in bug #6242 "AUDIO: Built-In MT-32 MUNT Produces Wrong Sounds".
Delaying MIDI events has been introduced with Munt 1.3.0.
Regression from 00992c1e68444a8123ffc89a971751cecf7287ed.
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Since we are not using munt's SHA-1 hashing code, this returns the most
appropriate feature set for CM-32L ROMs
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This reverts commit 908d2f39d7579c3f1781f7dedc7b26366a6d3dfc.
The licence of the SHA1 code that munt is using is unclear.
Reverting until it's sorted properly, for now
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