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/* 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;
fixed8_24 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 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 char main_path[512];
extern u32 update_backup_flag;
extern u32 clock_speed;
u32 update_gba();
void reset_gba();
#ifdef __LIBRETRO__
#define synchronize()
void init_main();
#else
void synchronize();
#endif
void quit();
void delay_us(u32 us_count);
void get_ticks_us(u64 *tick_return);
void game_name_ext(char *src, char *buffer, char *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(char *filename, s32 dummy);
#else
u32 file_length(const char *dummy, FILE *fp);
#endif
extern u32 real_frame_count;
extern u32 virtual_frame_count;
extern u32 max_frameskip;
extern u32 num_skipped_frames;
#ifdef IN_MEMORY_C
extern timer_type timer[4];
static u32 prescale_table[] = { 0, 6, 8, 10 };
#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 = \
(gbc_sound_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 - gbc_sound_last_cpu_ticks) * \
sound_frequency) / GBC_BASE_RATE) * 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; \
#endif // IN_MEMORY_C
void change_ext(const char *src, char *buffer, const char *extension);
void make_rpath(char *buff, size_t size, const char *ext);
void set_clock_speed();
#endif
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