115 lines
2.5 KiB
C++
115 lines
2.5 KiB
C++
/* Mednafen - Multi-system Emulator
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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*/
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#include "neopop.h"
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#include "sound.h"
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#include "sound/Blip_Buffer.h"
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#include "T6W28_Apu.h"
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#include "sound/Stereo_Buffer.h"
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namespace MDFN_IEN_NGP
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{
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static T6W28_Apu apu;
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static Stereo_Buffer st_buf;
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static uint8 LastDACLeft = 0, LastDACRight = 0;
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static uint8 CurrentDACLeft = 0, CurrentDACRight = 0;
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typedef Blip_Synth<blip_good_quality, 0xFF> Synth;
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static Synth synth;
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extern int32 ngpc_soundTS;
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static bool schipenable = 0;
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void MDFNNGPCSOUND_SetEnable(bool set)
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{
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schipenable = set;
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if (!set)
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apu.reset();
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}
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void Write_SoundChipLeft(uint8 data)
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{
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if (schipenable)
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apu.write_data_left(ngpc_soundTS >> 1, data);
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}
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void Write_SoundChipRight(uint8 data)
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{
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if (schipenable)
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apu.write_data_right(ngpc_soundTS >> 1, data);
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}
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void dac_write_left(uint8 data)
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{
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CurrentDACLeft = data;
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synth.offset_inline(ngpc_soundTS >> 1, CurrentDACLeft - LastDACLeft, st_buf.left());
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LastDACLeft = data;
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}
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void dac_write_right(uint8 data)
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{
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CurrentDACRight = data;
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synth.offset_inline(ngpc_soundTS >> 1, CurrentDACRight - LastDACRight, st_buf.right());
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LastDACRight = data;
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}
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int32 MDFNNGPCSOUND_Flush(int16 *SoundBuf, const int32 MaxSoundFrames)
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{
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int32 FrameCount = 0;
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apu.end_frame(ngpc_soundTS >> 1);
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st_buf.end_frame(ngpc_soundTS >> 1);
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if (SoundBuf)
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FrameCount = st_buf.read_samples(SoundBuf, MaxSoundFrames * 2) / 2;
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else
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st_buf.clear();
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return (FrameCount);
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}
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static void RedoVolume(void)
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{
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apu.output(st_buf.center(), st_buf.left(), st_buf.right());
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apu.volume(0.30);
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synth.volume(0.40);
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}
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void MDFNNGPCSOUND_Init(void)
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{
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MDFNNGPC_SetSoundRate(0);
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st_buf.clock_rate((long)(3072000));
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RedoVolume();
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st_buf.bass_freq(20);
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}
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bool MDFNNGPC_SetSoundRate(uint32 rate)
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{
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st_buf.set_sample_rate(rate ? rate : 44100, 60);
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return (TRUE);
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}
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}
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