92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
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// Nes_Emu 0.7.0. http://www.slack.net/~ant/libs/
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#include "Nes_Effects_Buffer.h"
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#include "Nes_Apu.h"
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/* Copyright (C) 2004-2006 Shay Green. This module is free software; you
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can redistribute it and/or modify it under the terms of the GNU Lesser
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General Public License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version. This
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module is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details. You should have received a copy of the GNU Lesser General
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Public License along with this module; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include "blargg_source.h"
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Nes_Effects_Buffer::Nes_Effects_Buffer() :
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Effects_Buffer( true ) // nes never uses stereo channels
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{
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config_t c;
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c.effects_enabled = false;
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config( c );
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}
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Nes_Effects_Buffer::~Nes_Effects_Buffer() { }
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Multi_Buffer* set_apu( Nes_Effects_Buffer* buf, Nes_Apu* apu )
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{
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buf->set_apu( apu );
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return buf;
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}
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void Nes_Effects_Buffer::enable_nonlinearity( bool b )
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{
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if ( b )
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clear();
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Nes_Apu* apu = nonlin.enable( b, channel( 2 ).center );
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apu->osc_output( 0, channel( 0 ).center );
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apu->osc_output( 1, channel( 1 ).center );
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}
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void Nes_Effects_Buffer::config( const config_t& in )
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{
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config_t c = in;
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if ( !c.effects_enabled )
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{
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// effects must always be enabled to keep separate buffers, so
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// set parameters to be equivalent to disabled
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c.pan_1 = 0;
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c.pan_2 = 0;
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c.echo_level = 0;
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c.reverb_level = 0;
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c.effects_enabled = true;
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}
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Effects_Buffer::config( c );
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}
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const char * Nes_Effects_Buffer::set_sample_rate( long rate, int msec )
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{
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enable_nonlinearity( nonlin.enabled ); // reapply
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return Effects_Buffer::set_sample_rate( rate, msec );
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}
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void Nes_Effects_Buffer::clear()
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{
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nonlin.clear();
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Effects_Buffer::clear();
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}
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Nes_Effects_Buffer::channel_t Nes_Effects_Buffer::channel( int i )
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{
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return Effects_Buffer::channel( (2 <= i && i <= 4) ? 2 : i & 1 );
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}
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long Nes_Effects_Buffer::read_samples( blip_sample_t* out, long count )
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{
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count = 2 * nonlin.make_nonlinear( *channel( 2 ).center, count / 2 );
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return Effects_Buffer::read_samples( out, count );
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}
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void Nes_Effects_Buffer::SaveAudioBufferState()
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{
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}
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void Nes_Effects_Buffer::RestoreAudioBufferState()
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{
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}
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