notaz.gp2x.de / gpsp.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
original source from gpsp09-2xb_src.tar.bz2
[gpsp.git] / main.h
CommitLineData
2823a4c8 1/* gameplaySP
2 *
3 * Copyright (C) 2006 Exophase <exophase@gmail.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20#ifndef MAIN_H
21#define MAIN_H
22
23typedef enum
24{
25 TIMER_INACTIVE,
26 TIMER_PRESCALE,
27 TIMER_CASCADE
28} timer_status_type;
29
30typedef enum
31{
32 TIMER_NO_IRQ,
33 TIMER_TRIGGER_IRQ
34} timer_irq_type;
35
36
37typedef enum
38{
39 TIMER_DS_CHANNEL_NONE,
40 TIMER_DS_CHANNEL_A,
41 TIMER_DS_CHANNEL_B,
42 TIMER_DS_CHANNEL_BOTH
43} timer_ds_channel_type;
44
45typedef struct
46{
47 s32 count;
48 u32 reload;
49 u32 prescale;
50 u32 stop_cpu_ticks;
51 fixed16_16 frequency_step;
52 timer_ds_channel_type direct_sound_channels;
53 timer_irq_type irq;
54 timer_status_type status;
55} timer_type;
56
57typedef enum
58{
59 auto_frameskip,
60 manual_frameskip,
61 no_frameskip
62} frameskip_type;
63
64extern u32 cpu_ticks;
65extern u32 frame_ticks;
66extern u32 execute_cycles;
67extern frameskip_type current_frameskip_type;
68extern u32 frameskip_value;
69extern u32 random_skip;
70extern u32 global_cycles_per_instruction;
71extern u32 synchronize_flag;
72extern u32 skip_next_frame;
73
74extern timer_type timer[4];
75static u32 prescale_table[] = { 0, 6, 8, 10 };
76
77extern u32 cycle_memory_access;
78extern u32 cycle_pc_relative_access;
79extern u32 cycle_sp_relative_access;
80extern u32 cycle_block_memory_access;
81extern u32 cycle_block_memory_sp_access;
82extern u32 cycle_block_memory_words;
83extern u32 cycle_dma16_words;
84extern u32 cycle_dma32_words;
85extern u32 flush_ram_count;
86
87extern u64 base_timestamp;
88
89extern u8 main_path[512];
90
91extern u32 update_backup_flag;
92extern u32 clock_speed;
93
94u32 update_gba();
95void reset_gba();
96void synchronize();
97void quit();
98void delay_us(u32 us_count);
99void get_ticks_us(u64 *tick_return);
100void game_name_ext(u8 *src, u8 *buffer, u8 *extension);
101void main_write_mem_savestate(file_tag_type savestate_file);
102void main_read_savestate(file_tag_type savestate_file);
103
104
105#ifdef PSP_BUILD
106
107u32 file_length(u8 *filename, s32 dummy);
108
109extern u32 real_frame_count;
110extern u32 virtual_frame_count;
111extern u32 max_frameskip;
112extern u32 num_skipped_frames;
113
114#endif
115
116
117#ifdef GP2X_BUILD
118
119extern u64 frame_count_initial_timestamp;
120extern u32 real_frame_count;
121extern u32 virtual_frame_count;
122extern u32 max_frameskip;
123extern u32 num_skipped_frames;
124
125#endif
126
127
128#ifdef PC_BUILD
129
130u32 file_length(u8 *dummy, FILE *fp);
131
132#endif
133
134#define count_timer(timer_number) \
135 timer[timer_number].reload = 0x10000 - value; \
136 if(timer_number < 2) \
137 { \
138 u32 timer_reload = \
139 timer[timer_number].reload << timer[timer_number].prescale; \
140 sound_update_frequency_step(timer_number); \
141 } \
142
143#define adjust_sound_buffer(timer_number, channel) \
144 if(timer[timer_number].direct_sound_channels & (0x01 << channel)) \
145 { \
146 direct_sound_channel[channel].buffer_index = \
147 (direct_sound_channel[channel].buffer_index + buffer_adjust) % \
148 BUFFER_SIZE; \
149 } \
150
151#define trigger_timer(timer_number) \
152 if(value & 0x80) \
153 { \
154 if(timer[timer_number].status == TIMER_INACTIVE) \
155 { \
156 u32 prescale = prescale_table[value & 0x03]; \
157 u32 timer_reload = timer[timer_number].reload; \
158 \
159 if((value >> 2) & 0x01) \
160 timer[timer_number].status = TIMER_CASCADE; \
161 else \
162 timer[timer_number].status = TIMER_PRESCALE; \
163 \
164 timer[timer_number].prescale = prescale; \
165 timer[timer_number].irq = (value >> 6) & 0x01; \
166 \
167 address16(io_registers, 0x100 + (timer_number * 4)) = \
168 -timer_reload; \
169 \
170 timer_reload <<= prescale; \
171 timer[timer_number].count = timer_reload; \
172 \
173 if(timer_reload < execute_cycles) \
174 execute_cycles = timer_reload; \
175 \
176 if(timer_number < 2) \
177 { \
178 u32 buffer_adjust = \
179 (u32)(((float)(cpu_ticks - timer[timer_number].stop_cpu_ticks) * \
180 sound_frequency) / 16777216.0) * 2; \
181 \
182 sound_update_frequency_step(timer_number); \
183 adjust_sound_buffer(timer_number, 0); \
184 adjust_sound_buffer(timer_number, 1); \
185 } \
186 } \
187 } \
188 else \
189 { \
190 if(timer[timer_number].status != TIMER_INACTIVE) \
191 { \
192 timer[timer_number].status = TIMER_INACTIVE; \
193 timer[timer_number].stop_cpu_ticks = cpu_ticks; \
194 } \
195 } \
196 address16(io_registers, 0x102 + (timer_number * 4)) = value; \
197
198void change_ext(u8 *src, u8 *buffer, u8 *extension);
199
200#endif
201
202
gpSP fork tuned for ARM Linux