1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
////////////////////////////////////////////////////////////////////////////////////////
//
// Nestopia - NES/Famicom emulator written in C++
//
// Copyright (C) 2003-2008 Martin Freij
//
// This file is part of Nestopia.
//
// Nestopia is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// Nestopia is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Nestopia; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
////////////////////////////////////////////////////////////////////////////////////////
#ifndef NST_TRACKER_REWINDER_H
#define NST_TRACKER_REWINDER_H
#include <sstream>
#include "api/NstApiSound.hpp"
#ifndef NST_VECTOR_H
#include "NstVector.hpp"
#endif
#ifdef NST_PRAGMA_ONCE
#pragma once
#endif
namespace Nes
{
namespace Core
{
class Tracker::Rewinder
{
typedef void (Machine::*EmuExecute)(Video::Output*,Sound::Output*,Input::Controllers*);
typedef void (Machine::*EmuSaveState)(State::Saver&) const;
typedef bool (Machine::*EmuLoadState)(State::Loader&,bool);
public:
Rewinder(Machine&,EmuExecute,EmuLoadState,EmuSaveState,Cpu&,const Apu&,Ppu&,bool);
~Rewinder();
Result Start();
Result Stop();
void Execute(Video::Output*,Sound::Output*,Input::Controllers*);
private:
void Reset(bool);
void LinkPorts(bool=true);
void ChangeDirection();
enum
{
NUM_KEYS = 60,
LAST_KEY = NUM_KEYS-1,
NUM_FRAMES = 60,
LAST_FRAME = NUM_FRAMES-1
};
class Key
{
class Input
{
typedef Vector<byte> Buffer;
enum
{
BAD_POS = INT_MAX,
MIN_COMPRESSION_SIZE = 1024,
OPEN_BUS = 0x40
};
dword pos;
Buffer buffer;
public:
void Reset();
inline void BeginForward();
bool EndForward();
void BeginBackward();
inline void EndBackward();
inline uint Put(uint);
inline uint Get();
inline void ResumeForward();
inline bool CanRewind() const;
inline void Invalidate();
};
Input input;
std::stringstream stream;
public:
Key();
~Key();
void Reset();
void BeginForward(Machine&,EmuSaveState,EmuLoadState);
void EndForward();
void BeginBackward(Machine&,EmuLoadState);
inline void EndBackward();
inline uint Put(uint);
inline uint Get();
inline bool CanRewind() const;
inline void ResumeForward();
inline void TurnForward(Machine&,EmuLoadState);
inline void Invalidate();
};
class ReverseVideo
{
public:
explicit ReverseVideo(Ppu&);
~ReverseVideo();
class Mutex;
void Begin();
void End();
void Store();
inline void Flush(const Mutex&);
private:
class Buffer;
uint pingpong;
uint frame;
Ppu& ppu;
Buffer* buffer;
};
class ReverseSound
{
public:
typedef Sound::Output Output;
ReverseSound(const Apu&,bool);
~ReverseSound();
class Mutex;
void Begin();
void End();
void Enable(bool);
Output* Store();
void Flush(Output*,const Mutex&);
private:
template<typename T>
const void* ReverseCopy(const Output&) const;
template<typename T,int SILENCE>
void ReverseSilence(const Output&) const;
template<typename T>
NST_FORCE_INLINE Output* StoreType();
bool Update();
bool enabled;
bool good;
byte stereo;
dword rate;
uint index;
void* buffer;
dword size;
Output output;
const void* input;
const Apu& apu;
public:
bool IsRewinding() const
{
return enabled && good && buffer;
}
};
inline Key* PrevKey(Key*);
inline Key* PrevKey();
inline Key* NextKey(Key*);
inline Key* NextKey();
NES_DECL_PEEK( Port_Get );
NES_DECL_PEEK( Port_Put );
NES_DECL_POKE( Port );
ibool rewinding;
ibool uturn;
uint frame;
const Io::Port* ports[2];
Key* key;
Key keys[NUM_KEYS];
ReverseSound sound;
ReverseVideo video;
Machine& emulator;
const EmuExecute emuExecute;
const EmuLoadState emuLoadState;
const EmuSaveState emuSaveState;
Cpu& cpu;
Ppu& ppu;
public:
void Reset()
{
Reset( true );
}
void Unload()
{
Reset( false );
}
void EnableSound(bool enable)
{
sound.Enable( enable );
}
bool IsRewinding() const
{
return rewinding;
}
bool IsSoundRewinding() const
{
return rewinding && sound.IsRewinding();
}
};
}
}
#endif
|
