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https://github.com/OpenEmu/Nestopia-Core.git
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clobber
108 lines
2.2 KiB
C++
108 lines
2.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////
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//
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// Nestopia - NES/Famicom emulator written in C++
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//
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// Copyright (C) 2003-2008 Martin Freij
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//
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// This file is part of Nestopia.
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//
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// Nestopia 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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// Nestopia 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 Nestopia; 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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////////////////////////////////////////////////////////////////////////////////////////
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#include "NstCpu.hpp"
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#include "NstSoundPcm.hpp"
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namespace Nes
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{
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namespace Core
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{
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namespace Sound
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{
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("s", on)
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#endif
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Pcm::Pcm(Apu& a)
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: Channel(a)
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{
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Connect( UpdateSettings() );
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}
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bool Pcm::CanDo(uint bits,dword rate)
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{
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return (bits == 8 || bits == 16) && (rate >= 8000 && rate <= 96000);
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}
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void Pcm::Reset()
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{
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Stop();
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}
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bool Pcm::UpdateSettings()
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{
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Stop();
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rate = GetSampleRate();
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muted = IsMuted();
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return true;
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}
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("", on)
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#endif
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void Pcm::Play(const iword* w,dword l,dword r)
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{
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NST_ASSERT( w && l && CanDo(16,r) );
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pos = 0;
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wave.data = w;
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wave.length = l;
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wave.rate = r;
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}
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void Pcm::Stop()
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{
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pos = 0;
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wave.data = NULL;
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wave.length = 0;
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wave.rate = 0;
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}
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Pcm::Sample Pcm::GetSample()
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{
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if (wave.data)
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{
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const dword i = pos / rate;
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if (i < wave.length)
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{
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pos += wave.rate;
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return !muted ? wave.data[i] : 0;
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}
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wave.data = NULL;
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}
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return 0;
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}
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}
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}
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}
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