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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 | |
23 | typedef enum |
24 | { |
25 | TIMER_INACTIVE, |
26 | TIMER_PRESCALE, |
27 | TIMER_CASCADE |
28 | } timer_status_type; |
29 | |
30 | typedef enum |
31 | { |
32 | TIMER_NO_IRQ, |
33 | TIMER_TRIGGER_IRQ |
34 | } timer_irq_type; |
35 | |
36 | |
37 | typedef 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 | |
45 | typedef 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 | |
57 | typedef enum |
58 | { |
59 | auto_frameskip, |
60 | manual_frameskip, |
61 | no_frameskip |
62 | } frameskip_type; |
63 | |
64 | extern u32 cpu_ticks; |
65 | extern u32 frame_ticks; |
66 | extern u32 execute_cycles; |
67 | extern frameskip_type current_frameskip_type; |
68 | extern u32 frameskip_value; |
69 | extern u32 random_skip; |
70 | extern u32 global_cycles_per_instruction; |
71 | extern u32 synchronize_flag; |
72 | extern u32 skip_next_frame; |
73 | |
74 | extern timer_type timer[4]; |
75 | static u32 prescale_table[] = { 0, 6, 8, 10 }; |
76 | |
77 | extern u32 cycle_memory_access; |
78 | extern u32 cycle_pc_relative_access; |
79 | extern u32 cycle_sp_relative_access; |
80 | extern u32 cycle_block_memory_access; |
81 | extern u32 cycle_block_memory_sp_access; |
82 | extern u32 cycle_block_memory_words; |
83 | extern u32 cycle_dma16_words; |
84 | extern u32 cycle_dma32_words; |
85 | extern u32 flush_ram_count; |
86 | |
87 | extern u64 base_timestamp; |
88 | |
89 | extern u8 main_path[512]; |
90 | |
91 | extern u32 update_backup_flag; |
92 | extern u32 clock_speed; |
93 | |
94 | u32 update_gba(); |
95 | void reset_gba(); |
96 | void synchronize(); |
97 | void quit(); |
98 | void delay_us(u32 us_count); |
99 | void get_ticks_us(u64 *tick_return); |
100 | void game_name_ext(u8 *src, u8 *buffer, u8 *extension); |
101 | void main_write_mem_savestate(file_tag_type savestate_file); |
102 | void main_read_savestate(file_tag_type savestate_file); |
103 | |
104 | |
105 | #ifdef PSP_BUILD |
106 | |
107 | u32 file_length(u8 *filename, s32 dummy); |
108 | |
109 | extern u32 real_frame_count; |
110 | extern u32 virtual_frame_count; |
111 | extern u32 max_frameskip; |
112 | extern u32 num_skipped_frames; |
113 | |
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114 | #else |
115 | |
116 | u32 file_length(u8 *dummy, FILE *fp); |
117 | |
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118 | #endif |
119 | |
120 | |
121 | #ifdef GP2X_BUILD |
122 | |
123 | extern u64 frame_count_initial_timestamp; |
124 | extern u32 real_frame_count; |
125 | extern u32 virtual_frame_count; |
126 | extern u32 max_frameskip; |
127 | extern u32 num_skipped_frames; |
128 | |
129 | #endif |
130 | |
131 | |
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132 | #define count_timer(timer_number) \ |
133 | timer[timer_number].reload = 0x10000 - value; \ |
134 | if(timer_number < 2) \ |
135 | { \ |
136 | u32 timer_reload = \ |
137 | timer[timer_number].reload << timer[timer_number].prescale; \ |
138 | sound_update_frequency_step(timer_number); \ |
139 | } \ |
140 | |
141 | #define adjust_sound_buffer(timer_number, channel) \ |
142 | if(timer[timer_number].direct_sound_channels & (0x01 << channel)) \ |
143 | { \ |
144 | direct_sound_channel[channel].buffer_index = \ |
145 | (direct_sound_channel[channel].buffer_index + buffer_adjust) % \ |
146 | BUFFER_SIZE; \ |
147 | } \ |
148 | |
149 | #define trigger_timer(timer_number) \ |
150 | if(value & 0x80) \ |
151 | { \ |
152 | if(timer[timer_number].status == TIMER_INACTIVE) \ |
153 | { \ |
154 | u32 prescale = prescale_table[value & 0x03]; \ |
155 | u32 timer_reload = timer[timer_number].reload; \ |
156 | \ |
157 | if((value >> 2) & 0x01) \ |
158 | timer[timer_number].status = TIMER_CASCADE; \ |
159 | else \ |
160 | timer[timer_number].status = TIMER_PRESCALE; \ |
161 | \ |
162 | timer[timer_number].prescale = prescale; \ |
163 | timer[timer_number].irq = (value >> 6) & 0x01; \ |
164 | \ |
165 | address16(io_registers, 0x100 + (timer_number * 4)) = \ |
166 | -timer_reload; \ |
167 | \ |
168 | timer_reload <<= prescale; \ |
169 | timer[timer_number].count = timer_reload; \ |
170 | \ |
171 | if(timer_reload < execute_cycles) \ |
172 | execute_cycles = timer_reload; \ |
173 | \ |
174 | if(timer_number < 2) \ |
175 | { \ |
176 | u32 buffer_adjust = \ |
177 | (u32)(((float)(cpu_ticks - timer[timer_number].stop_cpu_ticks) * \ |
178 | sound_frequency) / 16777216.0) * 2; \ |
179 | \ |
180 | sound_update_frequency_step(timer_number); \ |
181 | adjust_sound_buffer(timer_number, 0); \ |
182 | adjust_sound_buffer(timer_number, 1); \ |
183 | } \ |
184 | } \ |
185 | } \ |
186 | else \ |
187 | { \ |
188 | if(timer[timer_number].status != TIMER_INACTIVE) \ |
189 | { \ |
190 | timer[timer_number].status = TIMER_INACTIVE; \ |
191 | timer[timer_number].stop_cpu_ticks = cpu_ticks; \ |
192 | } \ |
193 | } \ |
194 | address16(io_registers, 0x102 + (timer_number * 4)) = value; \ |
195 | |
196 | void change_ext(u8 *src, u8 *buffer, u8 *extension); |
197 | |
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198 | void set_clock_speed(); |
199 | |
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200 | #endif |
201 | |
202 | |