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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) 2011-2017 - 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/strl.h>
#include <compat/posix_string.h>
#include <string/stdstring.h>
#include <audio/audio_resampler.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_MENU
#include "menu/menu_driver.h"
#endif
#include "command.h"
#include "dynamic.h"
#include "msg_hash.h"
#include "audio/audio_driver.h"
#include "camera/camera_driver.h"
#include "record/record_driver.h"
#include "location/location_driver.h"
#include "wifi/wifi_driver.h"
#include "led/led_driver.h"
#include "configuration.h"
#include "core.h"
#include "core_info.h"
#include "driver.h"
#include "retroarch.h"
#include "verbosity.h"
/**
* 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;
if (string_is_equal(label, "camera_driver"))
{
drv = camera_driver_find_handle(i);
if (drv)
strlcpy(s, camera_driver_find_ident(i), len);
}
else if (string_is_equal(label, "location_driver"))
{
drv = location_driver_find_handle(i);
if (drv)
strlcpy(s, location_driver_find_ident(i), len);
}
#ifdef HAVE_MENU
else if (string_is_equal(label, "menu_driver"))
{
drv = menu_driver_find_handle(i);
if (drv)
strlcpy(s, menu_driver_find_ident(i), len);
}
#endif
else if (string_is_equal(label, "input_driver"))
{
drv = input_driver_find_handle(i);
if (drv)
strlcpy(s, input_driver_find_ident(i), len);
}
else if (string_is_equal(label, "input_joypad_driver"))
{
drv = joypad_driver_find_handle(i);
if (drv)
strlcpy(s, joypad_driver_find_ident(i), len);
}
else if (string_is_equal(label, "video_driver"))
{
drv = video_driver_find_handle(i);
if (drv)
strlcpy(s, video_driver_find_ident(i), len);
}
else if (string_is_equal(label, "audio_driver"))
{
drv = audio_driver_find_handle(i);
if (drv)
strlcpy(s, audio_driver_find_ident(i), len);
}
else if (string_is_equal(label, "record_driver"))
{
drv = record_driver_find_handle(i);
if (drv)
strlcpy(s, record_driver_find_ident(i), len);
}
else if (string_is_equal(label, "audio_resampler_driver"))
{
drv = audio_resampler_driver_find_handle(i);
if (drv)
strlcpy(s, audio_resampler_driver_find_ident(i), len);
}
else if (string_is_equal(label, "wifi_driver"))
{
drv = wifi_driver_find_handle(i);
if (drv)
strlcpy(s, wifi_driver_find_ident(i), len);
}
return drv;
}
/**
* driver_find_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.
**/
static int driver_find_index(const char * label, const char *drv)
{
unsigned i;
char str[256];
str[0] = '\0';
for (i = 0;
find_driver_nonempty(label, i, str, sizeof(str)) != NULL; i++)
{
if (string_is_empty(str))
break;
if (string_is_equal_noncase(drv, str))
return i;
}
return -1;
}
static bool driver_find_first(const char *label, char *s, size_t len)
{
find_driver_nonempty(label, 0, s, len);
return true;
}
/**
* driver_find_last:
* @label : string of driver type to be found.
* @s : identifier of driver to be found.
* @len : size of @s.
*
* Find last driver in driver array.
**/
static bool driver_find_last(const char *label, char *s, size_t len)
{
unsigned i;
for (i = 0;
find_driver_nonempty(label, i, s, len) != NULL; i++)
{}
if (i)
find_driver_nonempty(label, i-1, s, len);
else
driver_find_first(label, s, len);
return true;
}
/**
* driver_find_prev:
* @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.
**/
static bool driver_find_prev(const char *label, char *s, size_t len)
{
int i = driver_find_index(label, s);
if (i > 0)
{
find_driver_nonempty(label, i - 1, s, len);
return true;
}
RARCH_WARN(
"Couldn't find any previous driver (current one: \"%s\").\n", s);
return false;
}
/**
* driver_find_next:
* @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 driver_find_next(const char *label, char *s, size_t len)
{
int i = driver_find_index(label, s);
if (i >= 0 && string_is_not_equal_fast(s, "null", 4))
{
find_driver_nonempty(label, i + 1, s, len);
return true;
}
RARCH_WARN("%s (current one: \"%s\").\n",
msg_hash_to_str(MSG_COULD_NOT_FIND_ANY_NEXT_DRIVER),
s);
return false;
}
static void driver_adjust_system_rates(void)
{
audio_driver_monitor_adjust_system_rates();
video_driver_monitor_adjust_system_rates();
if (!video_driver_get_ptr(false))
return;
if (rarch_ctl(RARCH_CTL_IS_NONBLOCK_FORCED, NULL))
command_event(CMD_EVENT_VIDEO_SET_NONBLOCKING_STATE, NULL);
else
driver_set_nonblock_state();
}
/**
* 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.
**/
void driver_set_nonblock_state(void)
{
bool enable = input_driver_is_nonblock_state();
/* Only apply non-block-state for video if we're using vsync. */
if (video_driver_is_active() && video_driver_get_ptr(false))
{
settings_t *settings = config_get_ptr();
bool video_nonblock = enable;
if ( !settings->bools.video_vsync
|| rarch_ctl(RARCH_CTL_IS_NONBLOCK_FORCED, NULL))
video_nonblock = true;
video_driver_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));
command_event(CMD_EVENT_REINIT, NULL);
/* 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(
msg_hash_to_str(MSG_RESTARTING_RECORDING_DUE_TO_DRIVER_REINIT),
2, 180, false);
command_event(CMD_EVENT_RECORD_DEINIT, NULL);
command_event(CMD_EVENT_RECORD_INIT, NULL);
}
return true;
}
/**
* drivers_init:
* @flags : Bitmask of drivers to initialize.
*
* Initializes drivers.
* @flags determines which drivers get initialized.
**/
void drivers_init(int flags)
{
bool video_is_threaded = false;
if (flags & DRIVER_VIDEO_MASK)
video_driver_unset_own_driver();
if (flags & DRIVER_AUDIO_MASK)
audio_driver_unset_own_driver();
if (flags & DRIVER_INPUT_MASK)
input_driver_unset_own_driver();
if (flags & DRIVER_CAMERA_MASK)
camera_driver_ctl(RARCH_CAMERA_CTL_UNSET_OWN_DRIVER, NULL);
if (flags & DRIVER_LOCATION_MASK)
location_driver_ctl(RARCH_LOCATION_CTL_UNSET_OWN_DRIVER, NULL);
if (flags & DRIVER_WIFI_MASK)
wifi_driver_ctl(RARCH_WIFI_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_MASK | DRIVER_AUDIO_MASK))
driver_adjust_system_rates();
if (flags & DRIVER_VIDEO_MASK)
{
struct retro_hw_render_callback *hwr =
video_driver_get_hw_context();
video_driver_monitor_reset();
video_driver_init(&video_is_threaded);
if (!video_driver_is_video_cache_context_ack()
&& hwr->context_reset)
hwr->context_reset();
video_driver_unset_video_cache_context_ack();
rarch_ctl(RARCH_CTL_SET_FRAME_TIME_LAST, NULL);
}
if (flags & DRIVER_AUDIO_MASK)
{
audio_driver_init();
audio_driver_new_devices_list();
}
/* Only initialize camera driver if we're ever going to use it. */
if ((flags & DRIVER_CAMERA_MASK) && camera_driver_ctl(RARCH_CAMERA_CTL_IS_ACTIVE, NULL))
camera_driver_ctl(RARCH_CAMERA_CTL_INIT, NULL);
/* Only initialize location driver if we're ever going to use it. */
if ((flags & DRIVER_LOCATION_MASK) && location_driver_ctl(RARCH_LOCATION_CTL_IS_ACTIVE, NULL))
init_location();
core_info_init_current_core();
#ifdef HAVE_MENU
if (flags & DRIVER_VIDEO_MASK)
{
if (flags & DRIVER_MENU_MASK)
menu_driver_init(video_is_threaded);
}
#endif
if (flags & (DRIVER_VIDEO_MASK | DRIVER_AUDIO_MASK))
{
/* Keep non-throttled state as good as possible. */
if (input_driver_is_nonblock_state())
driver_set_nonblock_state();
}
if (flags & DRIVER_LED_MASK)
{
led_driver_init();
}
}
/**
* uninit_drivers:
* @flags : Bitmask of drivers to deinitialize.
*
* Deinitializes drivers.
*
*
* @flags determines which drivers get deinitialized.
**/
/**
* Driver ownership - set this to true if the platform in question needs to 'own'
* the respective handle and therefore skip regular RetroArch
* driver teardown/reiniting procedure.
*
* If to true, the 'free' function will get skipped. It is
* then up to the driver implementation to properly handle
* 'reiniting' inside the 'init' function and make sure it
* returns the existing handle instead of allocating and
* returning a pointer to a new handle.
*
* Typically, if a driver intends to make use of this, it should
* set this to true at the end of its 'init' function.
**/
void driver_uninit(int flags)
{
core_info_deinit_list();
core_info_free_current_core();
#ifdef HAVE_MENU
if (flags & DRIVER_MENU_MASK)
menu_driver_ctl(RARCH_MENU_CTL_DEINIT, NULL);
#endif
if ((flags & DRIVER_LOCATION_MASK) && !location_driver_ctl(RARCH_LOCATION_CTL_OWNS_DRIVER, NULL))
location_driver_ctl(RARCH_LOCATION_CTL_DEINIT, NULL);
if ((flags & DRIVER_CAMERA_MASK) && !camera_driver_ctl(RARCH_CAMERA_CTL_OWNS_DRIVER, NULL))
camera_driver_ctl(RARCH_CAMERA_CTL_DEINIT, NULL);
if ((flags & DRIVER_WIFI_MASK) && !wifi_driver_ctl(RARCH_WIFI_CTL_OWNS_DRIVER, NULL))
wifi_driver_ctl(RARCH_WIFI_CTL_DEINIT, NULL);
if (flags & DRIVER_LED)
led_driver_free();
if (flags & DRIVERS_VIDEO_INPUT)
video_driver_free();
if (flags & DRIVER_AUDIO_MASK)
audio_driver_deinit();
if ((flags & DRIVER_VIDEO_MASK) && !video_driver_owns_driver())
video_driver_destroy_data();
if ((flags & DRIVER_INPUT_MASK) && !input_driver_owns_driver())
input_driver_destroy_data();
if ((flags & DRIVER_AUDIO_MASK) && !audio_driver_owns_driver())
audio_driver_destroy_data();
}
bool driver_ctl(enum driver_ctl_state state, void *data)
{
switch (state)
{
case RARCH_DRIVER_CTL_DEINIT:
video_driver_destroy();
audio_driver_destroy();
input_driver_destroy();
#ifdef HAVE_MENU
menu_driver_destroy();
#endif
location_driver_ctl(RARCH_LOCATION_CTL_DESTROY, NULL);
camera_driver_ctl(RARCH_CAMERA_CTL_DESTROY, NULL);
wifi_driver_ctl(RARCH_WIFI_CTL_DESTROY, NULL);
core_uninit_libretro_callbacks();
break;
case RARCH_DRIVER_CTL_INIT_PRE:
audio_driver_find_driver();
video_driver_find_driver();
input_driver_find_driver();
camera_driver_ctl(RARCH_CAMERA_CTL_FIND_DRIVER, NULL);
wifi_driver_ctl(RARCH_WIFI_CTL_FIND_DRIVER, NULL);
find_location_driver();
#ifdef HAVE_MENU
menu_driver_ctl(RARCH_MENU_CTL_FIND_DRIVER, NULL);
#endif
break;
case RARCH_DRIVER_CTL_SET_REFRESH_RATE:
{
float *hz = (float*)data;
video_monitor_set_refresh_rate(*hz);
audio_driver_monitor_set_rate();
driver_adjust_system_rates();
}
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_FIND_FIRST:
{
driver_ctx_info_t *drv = (driver_ctx_info_t*)data;
if (!drv)
return false;
return driver_find_first(drv->label, drv->s, drv->len);
}
case RARCH_DRIVER_CTL_FIND_LAST:
{
driver_ctx_info_t *drv = (driver_ctx_info_t*)data;
if (!drv)
return false;
return driver_find_last(drv->label, drv->s, drv->len);
}
case RARCH_DRIVER_CTL_FIND_PREV:
{
driver_ctx_info_t *drv = (driver_ctx_info_t*)data;
if (!drv)
return false;
return driver_find_prev(drv->label, drv->s, drv->len);
}
case RARCH_DRIVER_CTL_FIND_NEXT:
{
driver_ctx_info_t *drv = (driver_ctx_info_t*)data;
if (!drv)
return false;
return driver_find_next(drv->label, drv->s, drv->len);
}
case RARCH_DRIVER_CTL_FIND_INDEX:
{
driver_ctx_info_t *drv = (driver_ctx_info_t*)data;
if (!drv)
return false;
drv->len = driver_find_index(drv->label, drv->s);
}
break;
case RARCH_DRIVER_CTL_NONE:
default:
break;
}
return true;
}
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