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3bfcc5c09c
spc_amp from a x.4 fixed point number to a normal float. - Switched SPC playback from the external SNESAPU.DLL to Blargg's LGPL snes_spc library. I've compiled it with the fast DSP rather than the highly accurate one, since I didn't notice a meaningful difference between the two in my limited testing. In short: SPC playback is now built in to ZDoom. You don't need to download anything extra to make it work, and it also works on Linux as well as Windows (though building with Linux is currently untested). - Fixed: Stereo separation was calculated very wrongly when in 2D sound mode. SVN r794 (trunk)
86 lines
3.1 KiB
Text
86 lines
3.1 KiB
Text
snes_spc 0.9.0: SNES SPC-700 APU Emulator
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-----------------------------------------
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This library includes a full SPC emulator and an S-DSP emulator that can
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be used on its own. Two S-DSP emulators are available: a highly accurate
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one for use in a SNES emulator, and a 3x faster one for use in an SPC
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music player or a resource-limited SNES emulator.
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* Can be used from C and C++ code
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* Full SPC-700 APU emulator with cycle accuracy in most cases
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* Loads, plays, and saves SPC music files
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* Can save and load exact full emulator state
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* DSP voice muting, surround sound disable, and song tempo adjustment
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* Uses 7% CPU average on 400 MHz Mac to play an SPC using fast DSP
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The accurate DSP emulator is based on past research by others and
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hundreds of hours of recent research by me. It passes over a hundred
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strenuous timing and behavior validation tests that were also run on the
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SNES. As far as I know, it's the first DSP emulator with cycle accuracy,
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properly emulating every DSP register and memory access at the exact SPC
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cycle it occurs at, whereas previous DSP emulators emulated these only
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to the nearest sample (which occurs every 32 clocks).
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Author : Shay Green <gblargg@gmail.com>
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Website: http://www.slack.net/~ant/
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Forum : http://groups.google.com/group/blargg-sound-libs
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License: GNU Lesser General Public License (LGPL)
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Getting Started
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---------------
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Build a program consisting of demo/play_spc.c, demo/demo_util.c,
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demo/wave_writer.c, and all source files in snes_spc/. Put an SPC music
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file in the same directory and name it "test.spc". Running the program
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should generate the recording "out.wav".
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Read snes_spc.txt for more information. Post to the discussion forum for
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assistance.
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Files
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-----
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snes_spc.txt Documentation
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changes.txt Change log
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license.txt GNU LGPL license
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demo/
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play_spc.c Records SPC file to wave sound file
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benchmark.c Finds how fast emulator runs on your computer
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trim_spc.c Trims silence off beginning of an SPC file
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save_state.c Saves/loads exact emulator state to/from file
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comm.c Communicates with SPC how SNES would
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demo_util.h General utility functions used by demos
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demo_util.c
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wave_writer.h WAVE sound file writer used for demo output
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wave_writer.c
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fast_dsp/ Optional standalone fast DSP emulator
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SPC_DSP.h To use with full SPC emulator, move into
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SPC_DSP.cpp snes_spc/ and replace original files
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snes_spc/ Library sources
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blargg_config.h Configuration (modify as necessary)
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spc.h C interface to SPC emulator and sound filter
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spc.cpp
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SPC_Filter.h Optional filter to make sound more authentic
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SPC_Filter.cpp
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SNES_SPC.h Full SPC emulator
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SNES_SPC.cpp
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SNES_SPC_misc.cpp
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SNES_SPC_state.cpp
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SPC_CPU.h
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dsp.h C interface to DSP emulator
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dsp.cpp
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SPC_DSP.h Standalone accurate DSP emulator
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SPC_DSP.cpp
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blargg_common.h
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blargg_endian.h
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blargg_source.h
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--
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Shay Green <gblargg@gmail.com>
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