112 lines
2.3 KiB
C++
112 lines
2.3 KiB
C++
// Meteor - A Nintendo Gameboy Advance emulator
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// Copyright (C) 2009-2011 Philippe Daouadi
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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 3 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, see <http://www.gnu.org/licenses/>.
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#ifndef __CLOCK_H__
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#define __CLOCK_H__
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#include <stdint.h>
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#include <climits>
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#include <vector>
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#include <istream>
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#include <ostream>
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namespace AMeteor
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{
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class Clock
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{
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public :
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Clock ()
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{
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Reset();
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}
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void Reset ();
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void ResetCounter()
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{
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m_count = 0;
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}
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unsigned int GetCounter() const
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{
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return m_count;
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}
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void TimePass (unsigned short cycles)
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{
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m_cycles += cycles;
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}
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void Commit ();
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void WaitForNext ();
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void AddLcd (uint32_t cycles)
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{
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// The lcd clock is always enabled
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m_lcd += cycles;
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SetFirst();
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}
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void AddTimer (uint8_t num, uint32_t cycles)
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{
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if (m_timer[num] == INT_MAX)
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m_timer[num] = cycles;
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else
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m_timer[num] += cycles;
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SetFirst();
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}
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void SetTimer (uint8_t num, uint32_t cycles)
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{
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m_timer[num] = cycles;
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SetFirst();
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}
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void DisableTimer (uint8_t num)
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{
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m_timer[num] = INT_MAX;
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SetFirst();
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}
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int GetTimer (uint8_t num)
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{
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return m_timer[num];
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}
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//void SetBattery (uint32_t cycles)
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//{
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// m_battery = cycles;
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//}
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//void DisableBattery ()
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//{
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// m_battery = INT_MAX;
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// no need to SetFirst since battery will be disabled only in TimeEvent
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//}
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bool SaveState (std::ostream& stream);
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bool LoadState (std::istream& stream);
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private :
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// XXX freq
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static const int SOUND_PERIOD = 380;
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unsigned short m_cycles;
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unsigned short m_first;
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int m_lcd, m_timer[4], m_sound;//, m_battery;
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unsigned int m_count;
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void SetFirst ();
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};
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}
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#endif
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