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https://github.com/daniel5151/ANESE.git
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edb40e42e7
I started looking into how to make the APU, and boy, let me tell ya, it's going to be a massive undertaking. Undoubtedly a fun undertaking, but still... Since it's a personal goal to get Super Mario Bros 2 running before new years (after all, that game has won game-of-the-year i don't even know _how_ many years in a row), i've decided to just use Blargg's venerable `nes_snd_emu` library for now. It took some wrestling, it it's in, and it works! Almost. I still don't know why enabling the Frame IRQ kills most games, but i'll look into that! Welp, on to bigger and better things! Namely: MMC1, which will give me Zelda and... Super Mario Bros 2!
132 lines
3.8 KiB
Text
Executable file
132 lines
3.8 KiB
Text
Executable file
Nes_Snd_Emu Change Log
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----------------------
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Nes_Snd_Emu 0.1.7
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-----------------
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- Created discussion forum: http://groups.google.com/group/blargg-sound-libs
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- Added simplified version of APU to make it easy to get started
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- Added Konami VRC6 and Namco 106 sound chip emulators
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- Added support for APU's non-linear output
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- Added demo of using SDL sound, along with helpful Sound_Queue
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- Improved documentation
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- Redid state snapshot support
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Nes_Snd_Emu 0.1.5
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-----------------
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- Changed licensing to GNU Lesser General Public License (LGPL)
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- Partially implemented DMC non-linearity when its value is directly set using
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$4011, which reduces previously over-emphasized "popping" of percussion on some
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games (TMNT II in particular)
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- Implemented workaround for MSVC++ 6 compiler limitations, allowing it to work
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on that compiler again
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- Changed error return value of Blip_Buffer::sample_rate() to blargg_err_t
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(defined in blargg_common.h), to make error reporting consistent with other
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functions. This means the "no error" return value is the opposite of what it
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was before, which will break current code which checks the error return value:
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// current code (broken)
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if ( !buf.sample_rate( samples_per_sec ) )
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out_of_memory();
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// quick-and-dirty fix (just remove the ! operation)
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if ( buf.sample_rate( samples_per_sec ) )
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out_of_memory();
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// proper fix
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blargg_err_t error = buf.sample_rate( samples_per_sec );
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if ( error )
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report_error( error );
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- Added sample clamping to Blip_Buffer::read_samples(), allowing higher volume
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with little distortion
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- Changed 'size_t' values in Blip_Buffer interface to 'long'
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- Changed demo to generate a WAVE sound file rather than an AIFF file
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- Updated to Blip_Buffer 0.3.2
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Nes_Snd_Emu 0.1.4
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-----------------
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- Moved NSF player-related modules to Game_Music_Emu library
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- Added note about compiler optimizer bugs and workaround for one that was
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found
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- Nes_Apu::write_register() now takes the actual memory address, rather than
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register number (i.e. it now takes 0x4015 rather than 0x15). An assertion was
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added to catch the old usage. See Nes_Apu.h.
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- Replaced Blip_Buffer::buffer_size() and Blip_Buffer::units_per_sample() with
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simpler functions (see Blip_Buffer.h and updated demo)
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// old way
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if ( !buf.buffer_size( sample_count ) )
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out_of_memory();
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buf.units_per_sample( clocks_per_sec / samples_per_sec );
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// new way
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int length = 1000 / 2; // 1/2 second buffer length
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if ( !buf.sample_rate( samples_per_sec, length ) )
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out_of_memory();
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buf.clock_rate( clocks_per_sec );
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- Renamed Nes_Apu::master_volume() to volume()
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- Added Nes_Apu::output() to assign all oscillators in one call.
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- Changed Nes_Apu_Reflector.cpp to better insulate it:
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if ( load ) apu.noise.was_playing = true; // removed
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if ( load ) apu.dmc.last_amp = apu.dmc.dac; // removed
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if ( load ) apu.state_restored(); // added to end of reflect_apu()
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- Expanded notes
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- Updated to Blip_Buffer 0.3.0
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- Improved demo code
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- Made assertions more descriptive when they fail
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- Fixed problem with Solstice and the noise oscillator
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- Added usage.txt with full examples of use in a NES emulator
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- Optimized Nes_Apu::earliest_irq() and irq_notifer() invocation
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Nes_Snd_Emu 0.1.3
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-----------------
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- Added and moved documentation. References are now in header files.
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- Nes_Apu has full support for frame and DMC IRQs.
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- Nes_Apu supports Blip_Buffer's improved treble equalization.
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- Added Nes_Apu_Reflector for saving and restoring the APU's sound state
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to/from a file. Meant for emulators which freeze exact game state.
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- Reworked Nes_Snd_Emu's interface; the inherent fixed frame rate has been
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eliminated.
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- Added NES_SND_EMU_QUALITY setting.
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- Deprecated Nes_Channel and nes_sample_t; use Blip_Buffer and blip_sample_t
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instead.
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Nes_Snd_Emu 0.1
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---------------
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- Numerous changes from previous releases.
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