Squashed commit of the following:
REFACTOR : fix comments, logging, and rename some variables
REFACTOR : fix up some commentary, clean deadc0de
REFACTOR : mostly fix all the audio glitches
- amplitudes of samples are gradually shifted to zero when speaker has fallen silent
- simplifies speaker state machine
- fullspeed mode only enqueues quiet samples
REFACTOR : fix up a number of other functions and comments
REFACTOR : clean up code to submit normal speed wave buffer to OpenAL
Move some initializations to the cpu_thread()
REFACTOR : properly reset the speaker cycles access counter so we don't underflow and assert
REFACTOR : should never get a split buffer from our soundcore implementation
Fix warning from gcc ... static array size needs to be computed from integer values
REFACTOR : gcc (but not clang) complains about these, so just make them preprocessor defines
REFACTOR : use unsigned long long because we don't actually care that this counter is 64bit
REFACTOR : remainder_buffer and miscellaneous tweaks
- Adds implementation commentary to document remainder_buffer purpose
- Also adds sample average for square wave boundary in case where remainder_buffer not used (whole-sample boundary)
- Variable renaming and code shuffling
REFACTOR : do not dynamically alloc remainder buffer
- Never attribute to cache-coherancy bugs what is a simple thread race =P
REFACTOR : comments and whitespace
REFACTOR : rename public speaker API functions
REFACTOR : clean up public speaker API
REFACTOR : tabs to spaces
REFACTOR : moar deadc0de clean up and renaming
REFACTOR : remove deadc0de paths from soundcore
REFACTOR : fully excise soundtype stuff now that we only support soundcard output
Move a file static to function scope
REFACTOR : rename more variables and remove deadc0de
REFACTOR : samples_buffer naming and change to explict int16_t
REFACTOR : removed deadc0de and shuffled code locations
REFACTOR : remainder buffer naming and clarify type
REFACTOR : move joystick timing to VM module and remove header visibility
REFACTOR : clarify speaker variable name
REFACTOR : clarify cycle counting codepaths
REFACTOR : VBL/timing interfaces
- eliminates passing around a common global
REFACTOR : names and comments
HACK around volume issue
REFACTOR : rename speaker feedback variable
REFACTOR : rename global total cycle count
REFACTOR : rename a constant
Fix test builds
REFACTOR: rename to is_fullspeed
REFACTOR : local variable naming changes
REFACTOR : migrate cycle timing variables to correct location and remove header visibility
Allow fullspeed codepath to update speaker
REFACTOR : remove deadc0de paths in prep for cleanup
REFACTOR : speaker now manages its own VM entry point
* Added an option to set caps lock (basing it off X11's value is not working well)
* Added a reboot emulator option (because Ctrl-Alt-End is potentially mapped by the X11 WM. ahem, Xfce...
* Condensed reboot code path into reset codepath
* Reset sequence now checks for openapple or closedapple key and routes accordingly
* Pause/Break key is now strictly emulation pause key
* F4 is now unused
* End key is now mapped as //e reset key (easier to hit, and less likely window manager is using it)
* PrintScreen/SysReq key is now unused
* Now using OpenAL as the main backend, ALSA has been deprecated...
* soundcore-openal.[hc] - OpenAL sound output for emulator
* alhelpers.[hc] - OpenAL suport files
* mockingboard.[hc] , AY8910.[hc] , SSI263Phonemes.h - Mockingboard support ported from AppleWin ...
This is part 1 of 2
* Proper emulator timing is critical for emulating the Apple2 speaker with a
square wave on a modern soundcard. The AppleWin sources provided
reference, inspiration, and source for both timing and speaker emulation
code.
* cpu.S, cpu.h, timing.c : OK so I flip-flopped quite a bit here on how best
to do proper emulator timing, but the previous spinloop implementation was
not one of my more enlightened decisions :P ... cpu/power consumption
nightmare ...
* ds-shim.h, win-shim.h -- Shims for Windows-isms and DirectSound-isms. I
assume these will eventually be refactored away...
* soundcore.[hc], speaker.[hc] -- Directly ported from a recent version of
AppleWin. Everything I've added should be braced with #ifdef APPLE2IX.
* soundcore-alsa.[hc] -- An ALSA backend using mmap'ed soundcard access.
WARN: this is still a WIP and untested. Instead of nanosleep() the cpu thread
now uses an adaptive spinloop. This better emulates the actual apple //e speed
in preparation to do near-realtime audio. The drawback is that the cpu thread
is pegged at 100% usage.
