RetroArch/runloop.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2014 - Daniel De Matteis
* Copyright (C) 2012-2014 - Michael Lelli
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "general.h"
#include "performance.h"
#include "input/input_common.h"
#include "intl/intl.h"
#ifdef HAVE_MENU
#include "frontend/menu/menu_common.h"
#endif
static void set_volume(float gain)
{
char msg[256];
g_settings.audio.volume += gain;
g_settings.audio.volume = max(g_settings.audio.volume, -80.0f);
g_settings.audio.volume = min(g_settings.audio.volume, 12.0f);
snprintf(msg, sizeof(msg), "Volume: %.1f dB", g_settings.audio.volume);
msg_queue_clear(g_extern.msg_queue);
msg_queue_push(g_extern.msg_queue, msg, 1, 180);
RARCH_LOG("%s\n", msg);
g_extern.audio_data.volume_gain = db_to_gain(g_settings.audio.volume);
}
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static bool check_pause(bool pressed, bool frameadvance_pressed)
{
static bool old_focus = true;
bool focus = true;
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bool old_is_paused = g_extern.is_paused;
/* FRAMEADVANCE will set us into pause mode. */
pressed |= !g_extern.is_paused && frameadvance_pressed;
if (g_settings.pause_nonactive)
focus = driver.video->focus(driver.video_data);
if (focus && pressed)
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g_extern.is_paused = !g_extern.is_paused;
else if (focus && !old_focus)
g_extern.is_paused = false;
else if (!focus && old_focus)
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g_extern.is_paused = true;
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old_focus = focus;
if (g_extern.is_paused == old_is_paused)
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return false;
return true;
}
/* Rewind buttons works like FRAMEREWIND when paused.
* We will one-shot in that case. */
static inline bool check_is_oneshot(bool oneshot_pressed, bool rewind_pressed)
{
return (oneshot_pressed | rewind_pressed);
}
/* To avoid continous switching if we hold the button down, we require
* that the button must go from pressed to unpressed back to pressed
* to be able to toggle between then.
*/
static void check_fast_forward_button(bool fastforward_pressed,
bool hold_pressed, bool old_hold_pressed)
{
if (fastforward_pressed)
driver.nonblock_state = !driver.nonblock_state;
else if (old_hold_pressed != hold_pressed)
driver.nonblock_state = hold_pressed;
else
return;
driver_set_nonblock_state(driver.nonblock_state);
}
static void check_stateslots(bool pressed_increase, bool pressed_decrease)
{
char msg[PATH_MAX];
/* Save state slots */
if (pressed_increase)
g_settings.state_slot++;
else if (pressed_decrease)
{
if (g_settings.state_slot > 0)
g_settings.state_slot--;
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}
else
return;
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if (g_extern.msg_queue)
msg_queue_clear(g_extern.msg_queue);
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snprintf(msg, sizeof(msg), "State slot: %d",
g_settings.state_slot);
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if (g_extern.msg_queue)
msg_queue_push(g_extern.msg_queue, msg, 1, 180);
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RARCH_LOG("%s\n", msg);
}
static inline void setup_rewind_audio(void)
{
unsigned i;
/* Push audio ready to be played. */
g_extern.audio_data.rewind_ptr = g_extern.audio_data.rewind_size;
for (i = 0; i < g_extern.audio_data.data_ptr; i += 2)
{
g_extern.audio_data.rewind_buf[--g_extern.audio_data.rewind_ptr] =
g_extern.audio_data.conv_outsamples[i + 1];
g_extern.audio_data.rewind_buf[--g_extern.audio_data.rewind_ptr] =
g_extern.audio_data.conv_outsamples[i + 0];
}
g_extern.audio_data.data_ptr = 0;
}
static void check_rewind(bool pressed)
{
static bool first = true;
if (g_extern.frame_is_reverse)
{
/* We just rewound. Flush rewind audio buffer. */
retro_flush_audio(g_extern.audio_data.rewind_buf
+ g_extern.audio_data.rewind_ptr,
g_extern.audio_data.rewind_size - g_extern.audio_data.rewind_ptr);
g_extern.frame_is_reverse = false;
}
if (first)
{
first = false;
return;
}
if (!g_extern.state_manager)
return;
if (pressed)
{
const void *buf = NULL;
msg_queue_clear(g_extern.msg_queue);
if (state_manager_pop(g_extern.state_manager, &buf))
{
g_extern.frame_is_reverse = true;
setup_rewind_audio();
msg_queue_push(g_extern.msg_queue, RETRO_MSG_REWINDING, 0,
g_extern.is_paused ? 1 : 30);
pretro_unserialize(buf, g_extern.state_size);
if (g_extern.bsv.movie)
bsv_movie_frame_rewind(g_extern.bsv.movie);
}
else
msg_queue_push(g_extern.msg_queue,
RETRO_MSG_REWIND_REACHED_END, 0, 30);
}
else
{
static unsigned cnt = 0;
cnt = (cnt + 1) % (g_settings.rewind_granularity ?
g_settings.rewind_granularity : 1); /* Avoid possible SIGFPE. */
if ((cnt == 0) || g_extern.bsv.movie)
{
void *state = NULL;
state_manager_push_where(g_extern.state_manager, &state);
RARCH_PERFORMANCE_INIT(rewind_serialize);
RARCH_PERFORMANCE_START(rewind_serialize);
pretro_serialize(state, g_extern.state_size);
RARCH_PERFORMANCE_STOP(rewind_serialize);
state_manager_push_do(g_extern.state_manager);
}
}
retro_set_rewind_callbacks();
}
static void check_slowmotion(bool pressed)
{
g_extern.is_slowmotion = pressed;
if (!g_extern.is_slowmotion)
return;
if (g_settings.video.black_frame_insertion)
rarch_render_cached_frame();
msg_queue_clear(g_extern.msg_queue);
msg_queue_push(g_extern.msg_queue, g_extern.frame_is_reverse ?
"Slow motion rewind." : "Slow motion.", 0, 30);
}
static bool check_movie_init(void)
{
char path[PATH_MAX], msg[PATH_MAX];
bool ret = true;
if (g_extern.bsv.movie)
return false;
g_settings.rewind_granularity = 1;
if (g_settings.state_slot > 0)
{
snprintf(path, sizeof(path), "%s%d.bsv",
g_extern.bsv.movie_path, g_settings.state_slot);
}
else
{
snprintf(path, sizeof(path), "%s.bsv",
g_extern.bsv.movie_path);
}
snprintf(msg, sizeof(msg), "Starting movie record to \"%s\".", path);
g_extern.bsv.movie = bsv_movie_init(path, RARCH_MOVIE_RECORD);
if (!g_extern.bsv.movie)
ret = false;
msg_queue_clear(g_extern.msg_queue);
msg_queue_push(g_extern.msg_queue, g_extern.bsv.movie ?
msg : "Failed to start movie record.", 1, 180);
if (g_extern.bsv.movie)
RARCH_LOG("Starting movie record to \"%s\".\n", path);
else
RARCH_ERR("Failed to start movie record.\n");
return ret;
}
static bool check_movie_record(void)
{
if (!g_extern.bsv.movie)
return false;
msg_queue_clear(g_extern.msg_queue);
msg_queue_push(g_extern.msg_queue,
RETRO_MSG_MOVIE_RECORD_STOPPING, 2, 180);
RARCH_LOG(RETRO_LOG_MOVIE_RECORD_STOPPING);
rarch_main_command(RARCH_CMD_BSV_MOVIE_DEINIT);
return true;
}
static bool check_movie_playback(void)
{
if (!g_extern.bsv.movie_end)
return false;
msg_queue_push(g_extern.msg_queue,
RETRO_MSG_MOVIE_PLAYBACK_ENDED, 1, 180);
RARCH_LOG(RETRO_LOG_MOVIE_PLAYBACK_ENDED);
rarch_main_command(RARCH_CMD_BSV_MOVIE_DEINIT);
g_extern.bsv.movie_end = false;
g_extern.bsv.movie_playback = false;
return true;
}
static bool check_movie(void)
{
if (g_extern.bsv.movie_playback)
return check_movie_playback();
if (!g_extern.bsv.movie)
return check_movie_init();
return check_movie_record();
}
static void check_shader_dir(bool pressed_next, bool pressed_prev)
{
char msg[PATH_MAX];
const char *shader = NULL, *ext = NULL;
enum rarch_shader_type type = RARCH_SHADER_NONE;
if (!g_extern.shader_dir.list || !driver.video->set_shader)
return;
if (pressed_next)
{
g_extern.shader_dir.ptr = (g_extern.shader_dir.ptr + 1) %
g_extern.shader_dir.list->size;
}
else if (pressed_prev)
{
if (g_extern.shader_dir.ptr == 0)
g_extern.shader_dir.ptr = g_extern.shader_dir.list->size - 1;
else
g_extern.shader_dir.ptr--;
}
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else
return;
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shader = g_extern.shader_dir.list->elems[g_extern.shader_dir.ptr].data;
ext = path_get_extension(shader);
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if (strcmp(ext, "glsl") == 0 || strcmp(ext, "glslp") == 0)
type = RARCH_SHADER_GLSL;
else if (strcmp(ext, "cg") == 0 || strcmp(ext, "cgp") == 0)
type = RARCH_SHADER_CG;
else
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return;
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msg_queue_clear(g_extern.msg_queue);
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snprintf(msg, sizeof(msg), "Shader #%u: \"%s\".",
(unsigned)g_extern.shader_dir.ptr, shader);
msg_queue_push(g_extern.msg_queue, msg, 1, 120);
RARCH_LOG("Applying shader \"%s\".\n", shader);
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if (!driver.video->set_shader(driver.video_data, type, shader))
RARCH_WARN("Failed to apply shader.\n");
}
/*
* Checks for stuff like fullscreen, save states, etc.
*
* Returns:
* 0 - normal operation.
* 1 - when RetroArch is paused.
*/
static int do_state_checks(
retro_input_t input, retro_input_t old_input,
retro_input_t trigger_input)
{
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if (BIT64_GET(trigger_input, RARCH_SCREENSHOT))
rarch_main_command(RARCH_CMD_TAKE_SCREENSHOT);
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if (BIT64_GET(trigger_input, RARCH_MUTE))
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rarch_main_command(RARCH_CMD_AUDIO_MUTE_TOGGLE);
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if (BIT64_GET(input, RARCH_VOLUME_UP))
set_volume(0.5f);
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else if (BIT64_GET(input, RARCH_VOLUME_DOWN))
set_volume(-0.5f);
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if (BIT64_GET(trigger_input, RARCH_GRAB_MOUSE_TOGGLE))
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rarch_main_command(RARCH_CMD_GRAB_MOUSE_TOGGLE);
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if (BIT64_GET(trigger_input, RARCH_OVERLAY_NEXT))
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rarch_main_command(RARCH_CMD_OVERLAY_NEXT);
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if (!g_extern.is_paused)
{
if (BIT64_GET(trigger_input, RARCH_FULLSCREEN_TOGGLE_KEY))
rarch_main_command(RARCH_CMD_FULLSCREEN_TOGGLE);
}
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#ifdef HAVE_NETPLAY
if (driver.netplay_data)
{
if (BIT64_GET(trigger_input, RARCH_NETPLAY_FLIP))
rarch_main_command(RARCH_CMD_NETPLAY_FLIP_PLAYERS);
if (BIT64_GET(trigger_input, RARCH_FULLSCREEN_TOGGLE_KEY))
rarch_main_command(RARCH_CMD_FULLSCREEN_TOGGLE);
return 0;
}
#endif
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if (check_pause_func(trigger_input))
rarch_main_command(RARCH_CMD_PAUSE_TOGGLE);
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if (g_extern.is_paused)
{
if (BIT64_GET(trigger_input, RARCH_FULLSCREEN_TOGGLE_KEY))
{
rarch_main_command(RARCH_CMD_FULLSCREEN_TOGGLE);
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rarch_render_cached_frame();
}
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if (!check_oneshot_func(trigger_input))
return 1;
}
check_fast_forward_button_func(input, old_input, trigger_input);
check_stateslots_func(trigger_input);
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if (BIT64_GET(trigger_input, RARCH_SAVE_STATE_KEY))
rarch_main_command(RARCH_CMD_SAVE_STATE);
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else if (BIT64_GET(trigger_input, RARCH_LOAD_STATE_KEY))
rarch_main_command(RARCH_CMD_LOAD_STATE);
check_rewind_func(input);
check_slowmotion_func(input);
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if (BIT64_GET(trigger_input, RARCH_MOVIE_RECORD_TOGGLE))
check_movie();
check_shader_dir_func(trigger_input);
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if (BIT64_GET(trigger_input, RARCH_CHEAT_INDEX_PLUS))
cheat_manager_index_next(g_extern.cheat);
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else if (BIT64_GET(trigger_input, RARCH_CHEAT_INDEX_MINUS))
cheat_manager_index_prev(g_extern.cheat);
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else if (BIT64_GET(trigger_input, RARCH_CHEAT_TOGGLE))
cheat_manager_toggle(g_extern.cheat);
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if (BIT64_GET(trigger_input, RARCH_DISK_EJECT_TOGGLE))
rarch_main_command(RARCH_CMD_DISK_EJECT_TOGGLE);
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else if (BIT64_GET(trigger_input, RARCH_DISK_NEXT))
rarch_main_command(RARCH_CMD_DISK_NEXT);
else if (BIT64_GET(trigger_input, RARCH_DISK_PREV))
rarch_main_command(RARCH_CMD_DISK_PREV);
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if (BIT64_GET(trigger_input, RARCH_RESET))
rarch_main_command(RARCH_CMD_RESET);
return 0;
}
static inline int time_to_exit(retro_input_t input)
{
if (
g_extern.system.shutdown
|| check_quit_key_func(input)
|| (g_extern.max_frames && g_extern.frame_count >=
g_extern.max_frames)
|| (g_extern.bsv.movie_end && g_extern.bsv.eof_exit)
|| !driver.video->alive(driver.video_data)
)
return 1;
return 0;
}
static void update_frame_time(void)
{
retro_time_t time = rarch_get_time_usec();
retro_time_t delta = time - g_extern.system.frame_time_last;
bool is_locked_fps = g_extern.is_paused || driver.nonblock_state;
is_locked_fps |= !!driver.recording_data;
if (!g_extern.system.frame_time_last || is_locked_fps)
delta = g_extern.system.frame_time.reference;
if (!is_locked_fps && g_extern.is_slowmotion)
delta /= g_settings.slowmotion_ratio;
g_extern.system.frame_time_last = is_locked_fps ? 0 : time;
g_extern.system.frame_time.callback(delta);
}
#ifdef HAVE_MENU
static void do_state_check_menu_toggle(void)
{
if (g_extern.is_menu)
{
if (g_extern.main_is_init && !g_extern.libretro_dummy)
rarch_main_set_state(RARCH_ACTION_STATE_MENU_RUNNING_FINISHED);
return;
}
rarch_main_set_state(RARCH_ACTION_STATE_MENU_RUNNING);
}
#endif
static void limit_frame_time(void)
{
retro_time_t current = rarch_get_time_usec();
retro_time_t target = 0, to_sleep_ms = 0;
double effective_fps = g_extern.system.av_info.timing.fps
* g_settings.fastforward_ratio;
double mft_f = 1000000.0f / effective_fps;
g_extern.frame_limit.minimum_frame_time = (retro_time_t) roundf(mft_f);
target = g_extern.frame_limit.last_frame_time +
g_extern.frame_limit.minimum_frame_time;
to_sleep_ms = (target - current) / 1000;
if (to_sleep_ms > 0)
{
rarch_sleep((unsigned int)to_sleep_ms);
/* Combat jitter a bit. */
g_extern.frame_limit.last_frame_time +=
g_extern.frame_limit.minimum_frame_time;
}
else
g_extern.frame_limit.last_frame_time = rarch_get_time_usec();
}
static void check_block_hotkey(bool enable_hotkey)
{
bool use_hotkey_enable;
static const struct retro_keybind *bind =
&g_settings.input.binds[0][RARCH_ENABLE_HOTKEY];
/* Don't block the check to RARCH_ENABLE_HOTKEY
* unless we're really supposed to. */
driver.block_hotkey = driver.block_input;
// If we haven't bound anything to this, always allow hotkeys.
use_hotkey_enable = bind->key != RETROK_UNKNOWN ||
bind->joykey != NO_BTN ||
bind->joyaxis != AXIS_NONE;
driver.block_hotkey = driver.block_input ||
(use_hotkey_enable && !enable_hotkey);
/* If we hold ENABLE_HOTKEY button, block all libretro input to allow
* hotkeys to be bound to same keys as RetroPad. */
driver.block_libretro_input = use_hotkey_enable && enable_hotkey;
}
/* We query all known keys per frame. Returns a 64-bit mask
* of all pressed keys.
*
* TODO: In case RARCH_BIND_LIST_END starts exceeding 64,
* and you need a bitmask of more than 64 entries, reimplement
* it to use something like rarch_bits_t.
*/
static inline retro_input_t input_keys_pressed(void)
{
static const struct retro_keybind *binds[MAX_PLAYERS] = {
g_settings.input.binds[0],
g_settings.input.binds[1],
g_settings.input.binds[2],
g_settings.input.binds[3],
g_settings.input.binds[4],
g_settings.input.binds[5],
g_settings.input.binds[6],
g_settings.input.binds[7],
g_settings.input.binds[8],
g_settings.input.binds[9],
g_settings.input.binds[10],
g_settings.input.binds[11],
g_settings.input.binds[12],
g_settings.input.binds[13],
g_settings.input.binds[14],
g_settings.input.binds[15],
};
retro_input_t ret = 0;
int i, key;
g_extern.turbo_count++;
check_block_hotkey(driver.input->key_pressed(driver.input_data,
RARCH_ENABLE_HOTKEY));
input_push_analog_dpad((struct retro_keybind*)binds[0],
(g_settings.input.analog_dpad_mode[0] == ANALOG_DPAD_NONE) ?
ANALOG_DPAD_LSTICK : g_settings.input.analog_dpad_mode[0]);
for (i = 0; i < MAX_PLAYERS; i++)
{
input_push_analog_dpad(g_settings.input.autoconf_binds[i],
g_settings.input.analog_dpad_mode[i]);
g_extern.turbo_frame_enable[i] = driver.block_libretro_input ? 0 :
driver.input->input_state(driver.input_data, binds, i,
RETRO_DEVICE_JOYPAD, 0, RARCH_TURBO_ENABLE);
}
for (key = 0; key < RARCH_BIND_LIST_END; key++)
{
bool state = false;
if (
(!driver.block_libretro_input && (key < RARCH_FIRST_META_KEY)) ||
!driver.block_hotkey)
state = driver.input->key_pressed(driver.input_data, key);
#ifdef HAVE_OVERLAY
state = state || (driver.overlay_state.buttons & (1ULL << key));
#endif
#ifdef HAVE_COMMAND
if (driver.command)
state = state || rarch_cmd_get(driver.command, key);
#endif
if (state)
ret |= (1ULL << key);
}
input_pop_analog_dpad((struct retro_keybind*)binds[0]);
for (i = 0; i < MAX_PLAYERS; i++)
input_pop_analog_dpad(g_settings.input.autoconf_binds[i]);
return ret;
}
static bool input_flush(retro_input_t *input)
{
*input = 0;
/* If core was paused before entering menu, evoke
* pause toggle to wake it up. */
if (g_extern.is_paused)
BIT64_SET(*input, RARCH_PAUSE_TOGGLE);
return true;
}
/*
* RetroArch's main iteration loop.
*
* Returns:
* 0 - Forcibly wake up the loop.
* 1 - Wait until input to wake up the loop
* -1 - Quit out of iteration loop.
*/
int rarch_main_iterate(void)
{
unsigned i;
retro_input_t trigger_input;
int ret = 0;
static retro_input_t last_input = 0;
retro_input_t old_input = last_input;
retro_input_t input = input_keys_pressed();
last_input = input;
if (driver.flushing_input)
driver.flushing_input = (input) ? input_flush(&input) : false;
if (g_extern.lifecycle_state != 0)
{
int key;
for (key = 0; key < RARCH_BIND_LIST_END; key++)
{
if (BIT64_GET(g_extern.lifecycle_state, key))
BIT64_SET(input, key);
}
g_extern.lifecycle_state = 0;
}
trigger_input = input & ~old_input;
if (time_to_exit(input))
return -1;
if (g_extern.system.frame_time.callback)
update_frame_time();
#ifdef HAVE_MENU
if (check_enter_menu_func(trigger_input) || (g_extern.libretro_dummy))
do_state_check_menu_toggle();
if (g_extern.is_menu)
{
if (menu_iterate(input, old_input, trigger_input) == -1)
rarch_main_set_state(RARCH_ACTION_STATE_MENU_RUNNING_FINISHED);
if (!input && g_settings.menu.pause_libretro)
ret = 1;
goto success;
}
#endif
if (g_extern.exec)
{
g_extern.exec = false;
return -1;
}
if (do_state_checks(input, old_input, trigger_input))
{
/* RetroArch has been paused */
driver.retro_ctx.poll_cb();
rarch_sleep(10);
return 1;
}
#if defined(HAVE_THREADS)
lock_autosave();
#endif
#ifdef HAVE_NETPLAY
if (driver.netplay_data)
netplay_pre_frame((netplay_t*)driver.netplay_data);
#endif
if (g_extern.bsv.movie)
bsv_movie_set_frame_start(g_extern.bsv.movie);
if (g_extern.system.camera_callback.caps)
driver_camera_poll();
/* Update binds for analog dpad modes. */
for (i = 0; i < MAX_PLAYERS; i++)
{
if (!g_settings.input.analog_dpad_mode[i])
continue;
input_push_analog_dpad(g_settings.input.binds[i],
g_settings.input.analog_dpad_mode[i]);
input_push_analog_dpad(g_settings.input.autoconf_binds[i],
g_settings.input.analog_dpad_mode[i]);
}
if ((g_settings.video.frame_delay > 0) && !driver.nonblock_state)
rarch_sleep(g_settings.video.frame_delay);
/* Run libretro for one frame. */
pretro_run();
for (i = 0; i < MAX_PLAYERS; i++)
{
if (!g_settings.input.analog_dpad_mode[i])
continue;
input_pop_analog_dpad(g_settings.input.binds[i]);
input_pop_analog_dpad(g_settings.input.autoconf_binds[i]);
}
if (g_extern.bsv.movie)
bsv_movie_set_frame_end(g_extern.bsv.movie);
#ifdef HAVE_NETPLAY
if (driver.netplay_data)
netplay_post_frame((netplay_t*)driver.netplay_data);
#endif
#if defined(HAVE_THREADS)
unlock_autosave();
#endif
success:
if (g_settings.fastforward_ratio_throttle_enable)
limit_frame_time();
return ret;
}