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Diffstat (limited to 'main.h')
| -rw-r--r-- | main.h | 202 |
1 files changed, 202 insertions, 0 deletions
@@ -0,0 +1,202 @@ +/* gameplaySP + * + * Copyright (C) 2006 Exophase <exophase@gmail.com> + * + * This program 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. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef MAIN_H +#define MAIN_H + +typedef enum +{ + TIMER_INACTIVE, + TIMER_PRESCALE, + TIMER_CASCADE +} timer_status_type; + +typedef enum +{ + TIMER_NO_IRQ, + TIMER_TRIGGER_IRQ +} timer_irq_type; + + +typedef enum +{ + TIMER_DS_CHANNEL_NONE, + TIMER_DS_CHANNEL_A, + TIMER_DS_CHANNEL_B, + TIMER_DS_CHANNEL_BOTH +} timer_ds_channel_type; + +typedef struct +{ + s32 count; + u32 reload; + u32 prescale; + u32 stop_cpu_ticks; + fixed16_16 frequency_step; + timer_ds_channel_type direct_sound_channels; + timer_irq_type irq; + timer_status_type status; +} timer_type; + +typedef enum +{ + auto_frameskip, + manual_frameskip, + no_frameskip +} frameskip_type; + +extern u32 cpu_ticks; +extern u32 frame_ticks; +extern u32 execute_cycles; +extern frameskip_type current_frameskip_type; +extern u32 frameskip_value; +extern u32 random_skip; +extern u32 global_cycles_per_instruction; +extern u32 synchronize_flag; +extern u32 skip_next_frame; + +extern timer_type timer[4]; +static u32 prescale_table[] = { 0, 6, 8, 10 }; + +extern u32 cycle_memory_access; +extern u32 cycle_pc_relative_access; +extern u32 cycle_sp_relative_access; +extern u32 cycle_block_memory_access; +extern u32 cycle_block_memory_sp_access; +extern u32 cycle_block_memory_words; +extern u32 cycle_dma16_words; +extern u32 cycle_dma32_words; +extern u32 flush_ram_count; + +extern u64 base_timestamp; + +extern u8 main_path[512]; + +extern u32 update_backup_flag; +extern u32 clock_speed; + +u32 update_gba(); +void reset_gba(); +void synchronize(); +void quit(); +void delay_us(u32 us_count); +void get_ticks_us(u64 *tick_return); +void game_name_ext(u8 *src, u8 *buffer, u8 *extension); +void main_write_mem_savestate(file_tag_type savestate_file); +void main_read_savestate(file_tag_type savestate_file); + + +#ifdef PSP_BUILD + +u32 file_length(u8 *filename, s32 dummy); + +extern u32 real_frame_count; +extern u32 virtual_frame_count; +extern u32 max_frameskip; +extern u32 num_skipped_frames; + +#endif + + +#ifdef GP2X_BUILD + +extern u64 frame_count_initial_timestamp; +extern u32 real_frame_count; +extern u32 virtual_frame_count; +extern u32 max_frameskip; +extern u32 num_skipped_frames; + +#endif + + +#ifdef PC_BUILD + +u32 file_length(u8 *dummy, FILE *fp); + +#endif + +#define count_timer(timer_number) \ + timer[timer_number].reload = 0x10000 - value; \ + if(timer_number < 2) \ + { \ + u32 timer_reload = \ + timer[timer_number].reload << timer[timer_number].prescale; \ + sound_update_frequency_step(timer_number); \ + } \ + +#define adjust_sound_buffer(timer_number, channel) \ + if(timer[timer_number].direct_sound_channels & (0x01 << channel)) \ + { \ + direct_sound_channel[channel].buffer_index = \ + (direct_sound_channel[channel].buffer_index + buffer_adjust) % \ + BUFFER_SIZE; \ + } \ + +#define trigger_timer(timer_number) \ + if(value & 0x80) \ + { \ + if(timer[timer_number].status == TIMER_INACTIVE) \ + { \ + u32 prescale = prescale_table[value & 0x03]; \ + u32 timer_reload = timer[timer_number].reload; \ + \ + if((value >> 2) & 0x01) \ + timer[timer_number].status = TIMER_CASCADE; \ + else \ + timer[timer_number].status = TIMER_PRESCALE; \ + \ + timer[timer_number].prescale = prescale; \ + timer[timer_number].irq = (value >> 6) & 0x01; \ + \ + address16(io_registers, 0x100 + (timer_number * 4)) = \ + -timer_reload; \ + \ + timer_reload <<= prescale; \ + timer[timer_number].count = timer_reload; \ + \ + if(timer_reload < execute_cycles) \ + execute_cycles = timer_reload; \ + \ + if(timer_number < 2) \ + { \ + u32 buffer_adjust = \ + (u32)(((float)(cpu_ticks - timer[timer_number].stop_cpu_ticks) * \ + sound_frequency) / 16777216.0) * 2; \ + \ + sound_update_frequency_step(timer_number); \ + adjust_sound_buffer(timer_number, 0); \ + adjust_sound_buffer(timer_number, 1); \ + } \ + } \ + } \ + else \ + { \ + if(timer[timer_number].status != TIMER_INACTIVE) \ + { \ + timer[timer_number].status = TIMER_INACTIVE; \ + timer[timer_number].stop_cpu_ticks = cpu_ticks; \ + } \ + } \ + address16(io_registers, 0x102 + (timer_number * 4)) = value; \ + +void change_ext(u8 *src, u8 *buffer, u8 *extension); + +#endif + + |