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RetroArch/driver.c
twinaphex 9326151a3f (decompress/7zip_support.c) Cleanups
2015-06-12 23:24:36 +02:00

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2015 - 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 <rhash.h>
#include "driver.h"
#include "general.h"
#include "retroarch.h"
#include "compat/posix_string.h"
#include "gfx/video_monitor.h"
#include "audio/audio_monitor.h"
#ifdef HAVE_MENU
#include "menu/menu.h"
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
static driver_t *g_driver = NULL;
void driver_free(void)
{
if (g_driver)
free(g_driver);
g_driver = NULL;
}
static driver_t *driver_new(void)
{
driver_t *driver = (driver_t*)calloc(1, sizeof(driver_t));
if (!driver)
return NULL;
return driver;
}
void driver_clear_state(void)
{
driver_free();
g_driver = driver_new();
}
driver_t *driver_get_ptr(void)
{
return g_driver;
}
#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 = djb2_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[PATH_MAX_LENGTH] = {0};
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 (str[0] == '\0')
break;
if (!strcasecmp(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 && (strcmp(s, "null") != 0))
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;
}
/**
* init_drivers_pre:
*
* Attempts to find a default driver for
* all driver types.
*
* Should be run before init_drivers().
**/
void init_drivers_pre(void)
{
find_audio_driver();
find_video_driver();
find_input_driver();
find_camera_driver();
find_location_driver();
#ifdef HAVE_MENU
find_menu_driver();
#endif
}
static void driver_adjust_system_rates(void)
{
global_t *global = global_get_ptr();
driver_t *driver = driver_get_ptr();
audio_monitor_adjust_system_rates();
video_monitor_adjust_system_rates();
if (!driver->video_data)
return;
if (global->system.force_nonblock)
event_command(EVENT_CMD_VIDEO_SET_NONBLOCKING_STATE);
else
driver_set_nonblock_state(driver->nonblock_state);
}
/**
* driver_set_refresh_rate:
* @hz : New refresh rate for monitor.
*
* Sets monitor refresh rate to new value by calling
* video_monitor_set_refresh_rate(). Subsequently
* calls audio_monitor_set_refresh_rate().
**/
void driver_set_refresh_rate(float hz)
{
video_monitor_set_refresh_rate(hz);
audio_monitor_set_refresh_rate();
driver_adjust_system_rates();
}
/**
* driver_set_nonblock_state:
* @enable : Enable nonblock state?
*
* Sets audio and video drivers to nonblock state.
*
* If @enable is false, sets blocking state for both
* audio and video drivers instead.
**/
void driver_set_nonblock_state(bool enable)
{
settings_t *settings = config_get_ptr();
global_t *global = global_get_ptr();
driver_t *driver = driver_get_ptr();
/* Only apply non-block-state for video if we're using vsync. */
if (driver->video_active && driver->video_data)
{
bool video_nonblock = enable;
if (!settings->video.vsync || global->system.force_nonblock)
video_nonblock = true;
video_driver_set_nonblock_state(video_nonblock);
}
audio_driver_set_nonblocking_state(enable);
}
/**
* driver_update_system_av_info:
* @info : 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).
**/
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();
driver_t *driver = driver_get_ptr();
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 (driver->recording_data)
{
static const char *msg = "Restarting recording due to driver reinit.";
rarch_main_msg_queue_push(msg, 2, 180, false);
RARCH_WARN("%s\n", msg);
event_command(EVENT_CMD_RECORD_DEINIT);
event_command(EVENT_CMD_RECORD_INIT);
}
return true;
}
/**
* menu_update_libretro_info:
*
* Update menu state which depends on config.
**/
static void menu_update_libretro_info(void)
{
global_t *global = global_get_ptr();
struct retro_system_info *info = global ? &global->menu.info : NULL;
if (!global || !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);
}
/**
* init_drivers:
* @flags : Bitmask of drivers to initialize.
*
* Initializes drivers.
* @flags determines which drivers get initialized.
**/
void init_drivers(int flags)
{
driver_t *driver = driver_get_ptr();
global_t *global = global_get_ptr();
if (flags & DRIVER_VIDEO)
driver->video_data_own = false;
if (flags & DRIVER_AUDIO)
driver->audio_data_own = false;
if (flags & DRIVER_INPUT)
driver->input_data_own = false;
if (flags & DRIVER_CAMERA)
driver->camera_data_own = false;
if (flags & DRIVER_LOCATION)
driver->location_data_own = false;
#ifdef HAVE_MENU
/* By default, we want the menu to persist through driver reinits. */
driver->menu_data_own = true;
#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_monitor_reset();
init_video();
if (!driver->video_cache_context_ack
&& hw_render->context_reset)
hw_render->context_reset();
driver->video_cache_context_ack = false;
global->system.frame_time_last = 0;
}
if (flags & DRIVER_AUDIO)
init_audio();
/* Only initialize camera driver if we're ever going to use it. */
if ((flags & DRIVER_CAMERA) && driver->camera_active)
init_camera();
/* Only initialize location driver if we're ever going to use it. */
if ((flags & DRIVER_LOCATION) && driver->location_active)
init_location();
#ifdef HAVE_MENU
menu_update_libretro_info();
if (flags & DRIVER_MENU)
{
init_menu();
menu_driver_context_reset();
}
#endif
if (flags & (DRIVER_VIDEO | DRIVER_AUDIO))
{
/* Keep non-throttled state as good as possible. */
if (driver->nonblock_state)
driver_set_nonblock_state(driver->nonblock_state);
}
}
/**
* uninit_drivers:
* @flags : Bitmask of drivers to deinitialize.
*
* Deinitializes drivers.
* @flags determines which drivers get deinitialized.
**/
void uninit_drivers(int flags)
{
driver_t *driver = driver_get_ptr();
#ifdef HAVE_MENU
if (flags & DRIVER_MENU)
{
menu_driver_context_destroy();
if (!driver->menu_data_own)
{
menu_free(driver->menu);
driver->menu = NULL;
}
}
#endif
if ((flags & DRIVER_LOCATION) && !driver->location_data_own)
{
uninit_location();
driver->location_data = NULL;
}
if ((flags & DRIVER_CAMERA) && !driver->camera_data_own)
{
uninit_camera();
driver->camera_data = NULL;
}
if (flags & DRIVER_AUDIO)
uninit_audio();
if (flags & DRIVERS_VIDEO_INPUT)
uninit_video_input();
if (flags & DRIVER_VIDEO)
{
const struct retro_hw_render_callback *hw_render =
(const struct retro_hw_render_callback*)video_driver_callback();
if (hw_render->context_destroy && !driver->video_cache_context)
hw_render->context_destroy();
}
if ((flags & DRIVER_VIDEO) && !driver->video_data_own)
driver->video_data = NULL;
if ((flags & DRIVER_INPUT) && !driver->input_data_own)
driver->input_data = NULL;
if ((flags & DRIVER_AUDIO) && !driver->audio_data_own)
driver->audio_data = NULL;
}
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