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RetroArch/driver.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2016 - Daniel De Matteis
*
* 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 <compat/posix_string.h>
#include <string/stdstring.h>
#include "general.h"
#include "msg_hash.h"
#include "system.h"
#include "audio/audio_driver.h"
#include "audio/audio_resampler_driver.h"
#include "camera/camera_driver.h"
#include "record/record_driver.h"
#include "location/location_driver.h"
#include "libretro_version_1.h"
#ifdef HAVE_MENU
#include "menu/menu_driver.h"
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define HASH_LOCATION_DRIVER 0x09189689U
#define HASH_CAMERA_DRIVER 0xf25db959U
#define HASH_MENU_DRIVER 0xd607fb05U
#define HASH_INPUT_DRIVER 0x4c087840U
#define HASH_INPUT_JOYPAD_DRIVER 0xab124146U
#define HASH_VIDEO_DRIVER 0x1805a5e7U
#define HASH_AUDIO_DRIVER 0x26594002U
#define HASH_AUDIO_RESAMPLER_DRIVER 0xedcba9ecU
#define HASH_RECORD_DRIVER 0x144cd2cfU
/**
* find_driver_nonempty:
* @label : string of driver type to be found.
* @i : index of driver.
* @str : identifier name of the found driver
* gets written to this string.
* @len : size of @str.
*
* Find driver based on @label.
*
* Returns: NULL if no driver based on @label found, otherwise
* pointer to driver.
**/
static const void *find_driver_nonempty(const char *label, int i,
char *s, size_t len)
{
const void *drv = NULL;
uint32_t hash = msg_hash_calculate(label);
switch (hash)
{
case HASH_CAMERA_DRIVER:
drv = camera_driver_find_handle(i);
if (drv)
strlcpy(s, camera_driver_find_ident(i), len);
break;
case HASH_LOCATION_DRIVER:
drv = location_driver_find_handle(i);
if (drv)
strlcpy(s, location_driver_find_ident(i), len);
break;
case HASH_MENU_DRIVER:
#ifdef HAVE_MENU
drv = menu_driver_find_handle(i);
if (drv)
strlcpy(s, menu_driver_find_ident(i), len);
#endif
break;
case HASH_INPUT_DRIVER:
drv = input_driver_find_handle(i);
if (drv)
strlcpy(s, input_driver_find_ident(i), len);
break;
case HASH_INPUT_JOYPAD_DRIVER:
drv = joypad_driver_find_handle(i);
if (drv)
strlcpy(s, joypad_driver_find_ident(i), len);
break;
case HASH_VIDEO_DRIVER:
drv = video_driver_find_handle(i);
if (drv)
strlcpy(s, video_driver_find_ident(i), len);
break;
case HASH_AUDIO_DRIVER:
drv = audio_driver_find_handle(i);
if (drv)
strlcpy(s, audio_driver_find_ident(i), len);
break;
case HASH_RECORD_DRIVER:
drv = record_driver_find_handle(i);
if (drv)
strlcpy(s, record_driver_find_ident(i), len);
break;
case HASH_AUDIO_RESAMPLER_DRIVER:
drv = audio_resampler_driver_find_handle(i);
if (drv)
strlcpy(s, audio_resampler_driver_find_ident(i), len);
break;
}
return drv;
}
/**
* find_driver_index:
* @label : string of driver type to be found.
* @drv : identifier of driver to be found.
*
* Find index of the driver, based on @label.
*
* Returns: -1 if no driver based on @label and @drv found, otherwise
* index number of the driver found in the array.
**/
int find_driver_index(const char * label, const char *drv)
{
unsigned i;
char str[256];
const void *obj = NULL;
for (i = 0; (obj = (const void*)
find_driver_nonempty(label, i, str, sizeof(str))) != NULL; i++)
{
if (!obj)
return -1;
if (string_is_empty(str))
break;
if (string_is_equal_noncase(drv, str))
return i;
}
return -1;
}
bool find_first_driver(const char *label, char *s, size_t len)
{
find_driver_nonempty(label, 0, s, len);
return true;
}
/**
* find_prev_driver:
* @label : string of driver type to be found.
* @s : identifier of driver to be found.
* @len : size of @s.
*
* Find previous driver in driver array.
**/
bool find_prev_driver(const char *label, char *s, size_t len)
{
int i = find_driver_index(label, s);
if (i > 0)
find_driver_nonempty(label, i - 1, s, len);
else
{
RARCH_WARN(
"Couldn't find any previous driver (current one: \"%s\").\n", s);
return false;
}
return true;
}
/**
* find_next_driver:
* @label : string of driver type to be found.
* @s : identifier of driver to be found.
* @len : size of @s.
*
* Find next driver in driver array.
**/
bool find_next_driver(const char *label, char *s, size_t len)
{
int i = find_driver_index(label, s);
if (i >= 0 && !string_is_equal(s, "null"))
find_driver_nonempty(label, i + 1, s, len);
else
{
RARCH_WARN("Couldn't find any next driver (current one: \"%s\").\n", s);
return false;
}
return true;
}
static void driver_adjust_system_rates(void)
{
rarch_system_info_t *system = NULL;
runloop_ctl(RUNLOOP_CTL_SYSTEM_INFO_GET, &system);
audio_driver_ctl(RARCH_AUDIO_CTL_MONITOR_ADJUST_SYSTEM_RATES, NULL);
video_driver_ctl(RARCH_DISPLAY_CTL_MONITOR_ADJUST_SYSTEM_RATES, NULL);
if (!video_driver_get_ptr(false))
return;
if (system->force_nonblock)
event_command(EVENT_CMD_VIDEO_SET_NONBLOCKING_STATE);
else
driver_ctl(RARCH_DRIVER_CTL_SET_NONBLOCK_STATE, NULL);
}
/**
* driver_set_nonblock_state:
*
* Sets audio and video drivers to nonblock state (if enabled).
*
* If nonblock state is false, sets
* blocking state for both audio and video drivers instead.
**/
static void driver_set_nonblock_state(void)
{
rarch_system_info_t *system = NULL;
settings_t *settings = config_get_ptr();
bool enable = input_driver_ctl(
RARCH_INPUT_CTL_IS_NONBLOCK_STATE, NULL);
runloop_ctl(RUNLOOP_CTL_SYSTEM_INFO_GET, &system);
/* Only apply non-block-state for video if we're using vsync. */
if (video_driver_ctl(RARCH_DISPLAY_CTL_IS_ACTIVE, NULL)
&& video_driver_get_ptr(false))
{
bool video_nonblock = enable;
if (!settings->video.vsync || system->force_nonblock)
video_nonblock = true;
video_driver_ctl(RARCH_DISPLAY_CTL_SET_NONBLOCK_STATE, &video_nonblock);
}
audio_driver_set_nonblocking_state(enable);
}
/**
* driver_update_system_av_info:
* @data : pointer to new A/V info
*
* Update the system Audio/Video information.
* Will reinitialize audio/video drivers.
* Used by RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO.
*
* Returns: true (1) if successful, otherwise false (0).
**/
static bool driver_update_system_av_info(const struct retro_system_av_info *info)
{
struct retro_system_av_info *av_info = video_viewport_get_system_av_info();
memcpy(av_info, info, sizeof(*av_info));
event_command(EVENT_CMD_REINIT);
/* Cannot continue recording with different parameters.
* Take the easiest route out and just restart the recording. */
if (recording_driver_get_data_ptr())
{
runloop_msg_queue_push_new(
MSG_RESTARTING_RECORDING_DUE_TO_DRIVER_REINIT, 2, 180, false);
event_command(EVENT_CMD_RECORD_DEINIT);
event_command(EVENT_CMD_RECORD_INIT);
}
return true;
}
#ifdef HAVE_MENU
/**
* menu_update_libretro_info:
*
* Update menu state which depends on config.
**/
static void menu_update_libretro_info(void)
{
struct retro_system_info *info = NULL;
menu_driver_ctl(RARCH_MENU_CTL_SYSTEM_INFO_GET,
&info);
if (!info)
return;
#ifndef HAVE_DYNAMIC
retro_get_system_info(info);
#endif
event_command(EVENT_CMD_CORE_INFO_INIT);
event_command(EVENT_CMD_LOAD_CORE_PERSIST);
}
#endif
/**
* init_drivers:
* @flags : Bitmask of drivers to initialize.
*
* Initializes drivers.
* @flags determines which drivers get initialized.
**/
static void init_drivers(int flags)
{
if (flags & DRIVER_VIDEO)
video_driver_ctl(RARCH_DISPLAY_CTL_UNSET_OWN_DRIVER, NULL);
if (flags & DRIVER_AUDIO)
audio_driver_ctl(RARCH_AUDIO_CTL_UNSET_OWN_DRIVER, NULL);
if (flags & DRIVER_INPUT)
input_driver_ctl(RARCH_INPUT_CTL_UNSET_OWN_DRIVER, NULL);
if (flags & DRIVER_CAMERA)
camera_driver_ctl(RARCH_CAMERA_CTL_UNSET_OWN_DRIVER, NULL);
if (flags & DRIVER_LOCATION)
location_driver_ctl(RARCH_LOCATION_CTL_UNSET_OWN_DRIVER, NULL);
#ifdef HAVE_MENU
/* By default, we want the menu to persist through driver reinits. */
menu_driver_ctl(RARCH_MENU_CTL_SET_OWN_DRIVER, NULL);
#endif
if (flags & (DRIVER_VIDEO | DRIVER_AUDIO))
driver_adjust_system_rates();
if (flags & DRIVER_VIDEO)
{
const struct retro_hw_render_callback *hw_render =
(const struct retro_hw_render_callback*)video_driver_callback();
video_driver_ctl(RARCH_DISPLAY_CTL_MONITOR_RESET, NULL);
video_driver_ctl(RARCH_DISPLAY_CTL_INIT, NULL);
if (!video_driver_ctl(RARCH_DISPLAY_CTL_IS_VIDEO_CACHE_CONTEXT_ACK, NULL)
&& hw_render->context_reset)
hw_render->context_reset();
video_driver_ctl(RARCH_DISPLAY_CTL_UNSET_VIDEO_CACHE_CONTEXT_ACK, NULL);
runloop_ctl(RUNLOOP_CTL_SET_FRAME_TIME_LAST, NULL);
}
if (flags & DRIVER_AUDIO)
audio_driver_ctl(RARCH_AUDIO_CTL_INIT, NULL);
/* Only initialize camera driver if we're ever going to use it. */
if ((flags & DRIVER_CAMERA) && camera_driver_ctl(RARCH_CAMERA_CTL_IS_ACTIVE, NULL))
init_camera();
/* Only initialize location driver if we're ever going to use it. */
if ((flags & DRIVER_LOCATION) && location_driver_ctl(RARCH_LOCATION_CTL_IS_ACTIVE, NULL))
init_location();
#ifdef HAVE_MENU
menu_update_libretro_info();
if (flags & DRIVER_MENU)
{
init_menu();
menu_driver_ctl(RARCH_MENU_CTL_CONTEXT_RESET, NULL);
}
#endif
if (flags & (DRIVER_VIDEO | DRIVER_AUDIO))
{
/* Keep non-throttled state as good as possible. */
if (input_driver_ctl(RARCH_INPUT_CTL_IS_NONBLOCK_STATE, NULL))
driver_ctl(RARCH_DRIVER_CTL_SET_NONBLOCK_STATE, NULL);
}
}
/**
* uninit_drivers:
* @flags : Bitmask of drivers to deinitialize.
*
* Deinitializes drivers.
* @flags determines which drivers get deinitialized.
**/
static void uninit_drivers(int flags)
{
#ifdef HAVE_MENU
if (flags & DRIVER_MENU)
{
menu_driver_ctl(RARCH_MENU_CTL_CONTEXT_DESTROY, NULL);
if (!menu_driver_ctl(RARCH_MENU_CTL_OWNS_DRIVER, NULL))
menu_driver_ctl(RARCH_MENU_CTL_DEINIT, NULL);
}
#endif
if ((flags & DRIVER_LOCATION) && !location_driver_ctl(RARCH_LOCATION_CTL_OWNS_DRIVER, NULL))
location_driver_ctl(RARCH_LOCATION_CTL_DEINIT, NULL);
if ((flags & DRIVER_CAMERA) && !camera_driver_ctl(RARCH_CAMERA_CTL_OWNS_DRIVER, NULL))
camera_driver_ctl(RARCH_CAMERA_CTL_DEINIT, NULL);
if (flags & DRIVER_AUDIO)
audio_driver_ctl(RARCH_AUDIO_CTL_DEINIT, NULL);
if (flags & DRIVERS_VIDEO_INPUT)
video_driver_ctl(RARCH_DISPLAY_CTL_DEINIT, NULL);
if ((flags & DRIVER_VIDEO) && !video_driver_ctl(RARCH_DISPLAY_CTL_OWNS_DRIVER, NULL))
video_driver_ctl(RARCH_DISPLAY_CTL_DESTROY_DATA, NULL);
if ((flags & DRIVER_INPUT) && !input_driver_ctl(RARCH_INPUT_CTL_OWNS_DRIVER, NULL))
input_driver_ctl(RARCH_INPUT_CTL_DESTROY_DATA, NULL);
if ((flags & DRIVER_AUDIO) && !audio_driver_ctl(RARCH_AUDIO_CTL_OWNS_DRIVER, NULL))
audio_driver_ctl(RARCH_AUDIO_CTL_DESTROY_DATA, NULL);
}
bool driver_ctl(enum driver_ctl_state state, void *data)
{
switch (state)
{
case RARCH_DRIVER_CTL_DEINIT:
video_driver_ctl(RARCH_DISPLAY_CTL_DESTROY, NULL);
audio_driver_ctl(RARCH_AUDIO_CTL_DESTROY, NULL);
input_driver_ctl(RARCH_INPUT_CTL_DESTROY, NULL);
#ifdef HAVE_MENU
menu_driver_ctl(RARCH_MENU_CTL_DESTROY, NULL);
#endif
location_driver_ctl(RARCH_LOCATION_CTL_DESTROY, NULL);
camera_driver_ctl(RARCH_CAMERA_CTL_DESTROY, NULL);
retro_uninit_libretro_cbs();
break;
case RARCH_DRIVER_CTL_UNINIT:
{
int *flags = (int*)data;
if (!flags)
return false;
uninit_drivers(*flags);
}
return true;
case RARCH_DRIVER_CTL_INIT:
{
int *flags = (int*)data;
if (!flags)
return false;
init_drivers(*flags);
}
return true;
case RARCH_DRIVER_CTL_INIT_PRE:
audio_driver_ctl(RARCH_AUDIO_CTL_FIND_DRIVER, NULL);
video_driver_ctl(RARCH_DISPLAY_CTL_FIND_DRIVER, NULL);
input_driver_ctl(RARCH_INPUT_CTL_FIND_DRIVER, NULL);
find_camera_driver();
find_location_driver();
#ifdef HAVE_MENU
find_menu_driver();
#endif
break;
case RARCH_DRIVER_CTL_SET_REFRESH_RATE:
{
float *hz = (float*)data;
video_monitor_set_refresh_rate(*hz);
audio_driver_ctl(RARCH_AUDIO_CTL_MONITOR_SET_REFRESH_RATE, NULL);
driver_adjust_system_rates();
}
break;
case RARCH_DRIVER_CTL_SET_NONBLOCK_STATE:
driver_set_nonblock_state();
break;
case RARCH_DRIVER_CTL_UPDATE_SYSTEM_AV_INFO:
{
const struct retro_system_av_info **info = (const struct retro_system_av_info**)data;
if (info)
return driver_update_system_av_info(*info);
}
return false;
case RARCH_DRIVER_CTL_NONE:
default:
break;
}
return false;
}
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