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video_driver.c
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video_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 <stddef.h>
#include <string.h>
#include <retro_assert.h>
#include <gfx/scaler/pixconv.h>
#include <gfx/scaler/scaler.h>
#ifdef HAVE_THREADS
#include <rthreads/rthreads.h>
#endif
#include <file/config_file.h>
#include "video_thread_wrapper.h"
#include "../frontend/frontend_driver.h"
#include "video_context_driver.h"
#include "../record/record_driver.h"
#include "../config.def.h"
#include "../retroarch.h"
#include "../runloop.h"
#include "../performance.h"
#include "../list_special.h"
#include "../core.h"
#include "../system.h"
#include "../command_event.h"
#include "../msg_hash.h"
#ifdef HAVE_MENU
#include "../menu/menu_hash.h"
#include "../menu/menu_setting.h"
#endif
#include "../verbosity.h"
#define MEASURE_FRAME_TIME_SAMPLES_COUNT (2 * 1024)
#define TIME_TO_FPS(last_time, new_time, frames) ((1000000.0f * (frames)) / ((new_time) - (last_time)))
#define FPS_UPDATE_INTERVAL 256
#ifdef _WIN32
#define U64_SIGN "%I64u"
#else
#define U64_SIGN "%llu"
#endif
typedef struct video_driver_state
{
struct
{
retro_time_t samples[MEASURE_FRAME_TIME_SAMPLES_COUNT];
uint64_t count;
} frame_time;
enum retro_pixel_format pix_fmt;
unsigned video_width;
unsigned video_height;
float aspect_ratio;
struct
{
const void *data;
unsigned width;
unsigned height;
size_t pitch;
} frame_cache;
struct
{
rarch_softfilter_t *filter;
void *buffer;
unsigned scale;
unsigned out_bpp;
bool out_rgb32;
} filter;
} video_driver_state_t;
typedef struct video_pixel_scaler
{
struct scaler_ctx *scaler;
void *scaler_out;
} video_pixel_scaler_t;
/* Opaque handles to currently running window.
* Used by e.g. input drivers which bind to a window.
* Drivers are responsible for setting these if an input driver
* could potentially make use of this. */
static uintptr_t video_driver_display;
static uintptr_t video_driver_window;
static enum rarch_display_type video_driver_display_type;
static char video_driver_title_buf[64];
static uint64_t video_driver_frame_count;
static void *video_driver_data = NULL;
static video_driver_t *current_video = NULL;
/* Interface for "poking". */
static const video_poke_interface_t *video_driver_poke = NULL;
static video_driver_state_t video_driver_state;
/* Used for 16-bit -> 16-bit conversions that take place before
* being passed to video driver. */
static video_pixel_scaler_t *video_driver_scaler_ptr = NULL;
char rotation_lut[4][32] =
{
"Normal",
"90 deg",
"180 deg",
"270 deg"
};
struct aspect_ratio_elem aspectratio_lut[ASPECT_RATIO_END] = {
{ "4:3", 1.3333f },
{ "16:9", 1.7778f },
{ "16:10", 1.6f },
{ "16:15", 16.0f / 15.0f },
{ "1:1", 1.0f },
{ "2:1", 2.0f },
{ "3:2", 1.5f },
{ "3:4", 0.75f },
{ "4:1", 4.0f },
{ "4:4", 1.0f },
{ "5:4", 1.25f },
{ "6:5", 1.2f },
{ "7:9", 0.7777f },
{ "8:3", 2.6666f },
{ "8:7", 1.1428f },
{ "19:12", 1.5833f },
{ "19:14", 1.3571f },
{ "30:17", 1.7647f },
{ "32:9", 3.5555f },
{ "Config", 0.0f },
{ "Square pixel", 1.0f },
{ "Core provided", 1.0f },
{ "Custom", 0.0f }
};
static const video_driver_t *video_drivers[] = {
#ifdef HAVE_VULKAN
&video_vulkan,
#endif
#ifdef HAVE_OPENGL
&video_gl,
#endif
#ifdef XENON
&video_xenon360,
#endif
#if defined(HAVE_D3D)
&video_d3d,
#endif
#ifdef HAVE_VITA2D
&video_vita2d,
#endif
#ifdef PSP
&video_psp1,
#endif
#ifdef _3DS
&video_ctr,
#endif
#ifdef HAVE_SDL
&video_sdl,
#endif
#ifdef HAVE_SDL2
&video_sdl2,
#endif
#ifdef HAVE_XVIDEO
&video_xvideo,
#endif
#ifdef GEKKO
&video_gx,
#endif
#ifdef HAVE_VG
&video_vg,
#endif
#ifdef HAVE_OMAP
&video_omap,
#endif
#ifdef HAVE_EXYNOS
&video_exynos,
#endif
#ifdef HAVE_DISPMANX
&video_dispmanx,
#endif
#ifdef HAVE_SUNXI
&video_sunxi,
#endif
&video_null,
NULL,
};
/**
* video_driver_find_handle:
* @idx : index of driver to get handle to.
*
* Returns: handle to video driver at index. Can be NULL
* if nothing found.
**/
const void *video_driver_find_handle(int idx)
{
const void *drv = video_drivers[idx];
if (!drv)
return NULL;
return drv;
}
/**
* video_driver_find_ident:
* @idx : index of driver to get handle to.
*
* Returns: Human-readable identifier of video driver at index. Can be NULL
* if nothing found.
**/
const char *video_driver_find_ident(int idx)
{
const video_driver_t *drv = video_drivers[idx];
if (!drv)
return NULL;
return drv->ident;
}
/**
* config_get_video_driver_options:
*
* Get an enumerated list of all video driver names, separated by '|'.
*
* Returns: string listing of all video driver names, separated by '|'.
**/
const char* config_get_video_driver_options(void)
{
return char_list_new_special(STRING_LIST_VIDEO_DRIVERS, NULL);
}
static bool hw_render_context_is_vulkan(enum retro_hw_context_type type)
{
return type == RETRO_HW_CONTEXT_VULKAN;
}
static bool hw_render_context_is_gl(enum retro_hw_context_type type)
{
switch (type)
{
case RETRO_HW_CONTEXT_OPENGL:
case RETRO_HW_CONTEXT_OPENGLES2:
case RETRO_HW_CONTEXT_OPENGL_CORE:
case RETRO_HW_CONTEXT_OPENGLES3:
case RETRO_HW_CONTEXT_OPENGLES_VERSION:
return true;
default:
break;
}
return false;
}
/**
* video_driver_get_ptr:
*
* Use this if you need the real video driver
* and driver data pointers.
*
* Returns: video driver's userdata.
**/
void *video_driver_get_ptr(bool force_nonthreaded_data)
{
#ifdef HAVE_THREADS
settings_t *settings = config_get_ptr();
if (settings->video.threaded
&& !video_driver_is_hw_context()
&& !force_nonthreaded_data)
return rarch_threaded_video_get_ptr(NULL);
#endif
return video_driver_data;
}
const char *video_driver_get_ident(void)
{
return (current_video) ? current_video->ident : NULL;
}
const video_poke_interface_t *video_driver_get_poke(void)
{
return video_driver_poke;
}
/**
* video_driver_get_current_framebuffer:
*
* Gets pointer to current hardware renderer framebuffer object.
* Used by RETRO_ENVIRONMENT_SET_HW_RENDER.
*
* Returns: pointer to hardware framebuffer object, otherwise 0.
**/
uintptr_t video_driver_get_current_framebuffer(void)
{
if (!video_driver_poke || !video_driver_poke->get_current_framebuffer)
return 0;
return video_driver_poke->get_current_framebuffer(video_driver_data);
}
retro_proc_address_t video_driver_get_proc_address(const char *sym)
{
if (!video_driver_poke || !video_driver_poke->get_proc_address)
return NULL;
return video_driver_poke->get_proc_address(video_driver_data, sym);
}
bool video_driver_set_shader(enum rarch_shader_type type,
const char *path)
{
if (!current_video->set_shader)
return false;
return current_video->set_shader(video_driver_data, type, path);
}
static void deinit_video_filter(void)
{
rarch_softfilter_free(video_driver_state.filter.filter);
#ifdef _3DS
linearFree(video_driver_state.filter.buffer);
#else
free(video_driver_state.filter.buffer);
#endif
memset(&video_driver_state.filter, 0,
sizeof(video_driver_state.filter));
}
static void init_video_filter(enum retro_pixel_format colfmt)
{
unsigned width, height, pow2_x, pow2_y, maxsize;
struct retro_game_geometry *geom = NULL;
settings_t *settings = config_get_ptr();
struct retro_system_av_info *av_info =
video_viewport_get_system_av_info();
deinit_video_filter();
if (!*settings->path.softfilter_plugin)
return;
/* Deprecated format. Gets pre-converted. */
if (colfmt == RETRO_PIXEL_FORMAT_0RGB1555)
colfmt = RETRO_PIXEL_FORMAT_RGB565;
if (video_driver_is_hw_context())
{
RARCH_WARN("Cannot use CPU filters when hardware rendering is used.\n");
return;
}
if (av_info)
geom = (struct retro_game_geometry*)&av_info->geometry;
if (!geom)
return;
width = geom->max_width;
height = geom->max_height;
video_driver_state.filter.filter = rarch_softfilter_new(
settings->path.softfilter_plugin,
RARCH_SOFTFILTER_THREADS_AUTO, colfmt, width, height);
if (!video_driver_state.filter.filter)
{
RARCH_ERR("Failed to load filter.\n");
return;
}
rarch_softfilter_get_max_output_size(video_driver_state.filter.filter,
&width, &height);
pow2_x = next_pow2(width);
pow2_y = next_pow2(height);
maxsize = MAX(pow2_x, pow2_y);
video_driver_state.filter.scale = maxsize / RARCH_SCALE_BASE;
video_driver_state.filter.out_rgb32 = rarch_softfilter_get_output_format(
video_driver_state.filter.filter) == RETRO_PIXEL_FORMAT_XRGB8888;
video_driver_state.filter.out_bpp =
video_driver_state.filter.out_rgb32 ?
sizeof(uint32_t) : sizeof(uint16_t);
/* TODO: Aligned output. */
#ifdef _3DS
video_driver_state.filter.buffer = linearMemAlign(width
* height * video_driver_state.filter.out_bpp, 0x80);
#else
video_driver_state.filter.buffer = malloc(width
* height * video_driver_state.filter.out_bpp);
#endif
if (!video_driver_state.filter.buffer)
goto error;
return;
error:
RARCH_ERR("Softfilter initialization failed.\n");
deinit_video_filter();
}
static void init_video_input(const input_driver_t *tmp)
{
const input_driver_t **input = input_get_double_ptr();
if (*input)
return;
/* Video driver didn't provide an input driver,
* so we use configured one. */
RARCH_LOG("Graphics driver did not initialize an input driver. Attempting to pick a suitable driver.\n");
if (tmp)
*input = tmp;
else
input_driver_find_driver();
/* This should never really happen as tmp (driver.input) is always
* found before this in find_driver_input(), or we have aborted
* in a similar fashion anyways. */
if (!input_get_ptr())
goto error;
if (input_driver_init())
return;
error:
RARCH_ERR("Cannot initialize input driver. Exiting ...\n");
retroarch_fail(1, "init_video_input()");
}
/**
* video_monitor_compute_fps_statistics:
*
* Computes monitor FPS statistics.
**/
static void video_monitor_compute_fps_statistics(void)
{
double avg_fps = 0.0;
double stddev = 0.0;
unsigned samples = 0;
settings_t *settings = config_get_ptr();
if (settings->video.threaded)
{
RARCH_LOG("Monitor FPS estimation is disabled for threaded video.\n");
return;
}
if (video_driver_state.frame_time.count <
(2 * MEASURE_FRAME_TIME_SAMPLES_COUNT))
{
RARCH_LOG(
"Does not have enough samples for monitor refresh rate estimation. Requires to run for at least %u frames.\n",
2 * MEASURE_FRAME_TIME_SAMPLES_COUNT);
return;
}
if (video_monitor_fps_statistics(&avg_fps, &stddev, &samples))
{
RARCH_LOG("Average monitor Hz: %.6f Hz. (%.3f %% frame time deviation, based on %u last samples).\n",
avg_fps, 100.0 * stddev, samples);
}
}
static void deinit_pixel_converter(void)
{
if (!video_driver_scaler_ptr)
return;
scaler_ctx_gen_reset(video_driver_scaler_ptr->scaler);
if (video_driver_scaler_ptr->scaler)
free(video_driver_scaler_ptr->scaler);
video_driver_scaler_ptr->scaler = NULL;
if (video_driver_scaler_ptr->scaler_out)
free(video_driver_scaler_ptr->scaler_out);
video_driver_scaler_ptr->scaler_out = NULL;
if (video_driver_scaler_ptr)
free(video_driver_scaler_ptr);
video_driver_scaler_ptr = NULL;
}
static bool uninit_video_input(void)
{
event_cmd_ctl(EVENT_CMD_OVERLAY_DEINIT, NULL);
if (!video_driver_is_video_cache_context())
video_driver_deinit_hw_context();
if (
!input_driver_owns_driver() &&
!input_driver_is_data_ptr_same(video_driver_data)
)
input_driver_deinit();
if (
!video_driver_owns_driver()
&& video_driver_data
&& current_video && current_video->free
)
current_video->free(video_driver_data);
deinit_pixel_converter();
deinit_video_filter();
event_cmd_ctl(EVENT_CMD_SHADER_DIR_DEINIT, NULL);
video_monitor_compute_fps_statistics();
return true;
}
static bool init_video_pixel_converter(unsigned size)
{
struct retro_hw_render_callback *hwr =
video_driver_get_hw_context();
/* If pixel format is not 0RGB1555, we don't need to do
* any internal pixel conversion. */
if (video_driver_get_pixel_format() != RETRO_PIXEL_FORMAT_0RGB1555)
return true;
/* No need to perform pixel conversion for HW rendering contexts. */
if (hwr && hwr->context_type != RETRO_HW_CONTEXT_NONE)
return true;
RARCH_WARN("0RGB1555 pixel format is deprecated, and will be slower. For 15/16-bit, RGB565 format is preferred.\n");
video_driver_scaler_ptr = (video_pixel_scaler_t*)
calloc(1, sizeof(*video_driver_scaler_ptr));
if (!video_driver_scaler_ptr)
goto error;
video_driver_scaler_ptr->scaler = (struct scaler_ctx*)
calloc(1, sizeof(*video_driver_scaler_ptr->scaler));
if (!video_driver_scaler_ptr->scaler)
goto error;
video_driver_scaler_ptr->scaler->scaler_type = SCALER_TYPE_POINT;
video_driver_scaler_ptr->scaler->in_fmt = SCALER_FMT_0RGB1555;
/* TODO: Pick either ARGB8888 or RGB565 depending on driver. */
video_driver_scaler_ptr->scaler->out_fmt = SCALER_FMT_RGB565;
if (!scaler_ctx_gen_filter(video_driver_scaler_ptr->scaler))
goto error;
video_driver_scaler_ptr->scaler_out =
calloc(sizeof(uint16_t), size * size);
if (!video_driver_scaler_ptr->scaler_out)
goto error;
return true;
error:
deinit_pixel_converter();
deinit_video_filter();
return false;
}
static bool init_video(void)
{
unsigned max_dim, scale, width, height;
video_viewport_t *custom_vp = NULL;
const input_driver_t *tmp = NULL;
const struct retro_game_geometry *geom = NULL;
rarch_system_info_t *system = NULL;
video_info_t video = {0};
static uint16_t dummy_pixels[32] = {0};
settings_t *settings = config_get_ptr();
struct retro_system_av_info *av_info =
video_viewport_get_system_av_info();
runloop_ctl(RUNLOOP_CTL_SYSTEM_INFO_GET, &system);
init_video_filter(video_driver_state.pix_fmt);
event_cmd_ctl(EVENT_CMD_SHADER_DIR_INIT, NULL);
if (av_info)
geom = (const struct retro_game_geometry*)&av_info->geometry;
if (!geom)
{
RARCH_ERR("AV geometry not initialized, cannot initialize video driver.\n");
goto error;
}
max_dim = MAX(geom->max_width, geom->max_height);
scale = next_pow2(max_dim) / RARCH_SCALE_BASE;
scale = MAX(scale, 1);
if (video_driver_state.filter.filter)
scale = video_driver_state.filter.scale;
/* Update core-dependent aspect ratio values. */
video_driver_set_viewport_square_pixel();
video_driver_set_viewport_core();
video_driver_set_viewport_config();
/* Update CUSTOM viewport. */
custom_vp = video_viewport_get_custom();
if (settings->video.aspect_ratio_idx == ASPECT_RATIO_CUSTOM)
{
float default_aspect = aspectratio_lut[ASPECT_RATIO_CORE].value;
aspectratio_lut[ASPECT_RATIO_CUSTOM].value =
(custom_vp->width && custom_vp->height) ?
(float)custom_vp->width / custom_vp->height : default_aspect;
}
video_driver_set_aspect_ratio_value(
aspectratio_lut[settings->video.aspect_ratio_idx].value);
if (settings->video.fullscreen)
{
width = settings->video.fullscreen_x;
height = settings->video.fullscreen_y;
}
else
{
if (settings->video.force_aspect)
{
/* Do rounding here to simplify integer scale correctness. */
unsigned base_width =
roundf(geom->base_height * video_driver_get_aspect_ratio());
width = roundf(base_width * settings->video.scale);
}
else
width = roundf(geom->base_width * settings->video.scale);
height = roundf(geom->base_height * settings->video.scale);
}
if (width && height)
RARCH_LOG("Video @ %ux%u\n", width, height);
else
RARCH_LOG("Video @ fullscreen\n");
video_driver_display_type_set(RARCH_DISPLAY_NONE);
video_driver_display_set(0);
video_driver_window_set(0);
if (!init_video_pixel_converter(RARCH_SCALE_BASE * scale))
{
RARCH_ERR("Failed to initialize pixel converter.\n");
goto error;
}
video.width = width;
video.height = height;
video.fullscreen = settings->video.fullscreen;
video.vsync = settings->video.vsync && !runloop_ctl(RUNLOOP_CTL_IS_NONBLOCK_FORCED, NULL);
video.force_aspect = settings->video.force_aspect;
#ifdef GEKKO
video.viwidth = settings->video.viwidth;
video.vfilter = settings->video.vfilter;
#endif
video.smooth = settings->video.smooth;
video.input_scale = scale;
video.rgb32 = video_driver_state.filter.filter ?
video_driver_state.filter.out_rgb32 :
(video_driver_state.pix_fmt == RETRO_PIXEL_FORMAT_XRGB8888);
/* Reset video frame count */
video_driver_frame_count = 0;
tmp = input_get_ptr();
/* Need to grab the "real" video driver interface on a reinit. */
video_driver_find_driver();
#ifdef HAVE_THREADS
if (settings->video.threaded
&& !video_driver_is_hw_context())
{
/* Can't do hardware rendering with threaded driver currently. */
RARCH_LOG("Starting threaded video driver ...\n");
if (!rarch_threaded_video_init((const video_driver_t**)¤t_video,
&video_driver_data,
input_get_double_ptr(), input_driver_get_data_ptr(),
current_video, &video))
{
RARCH_ERR("Cannot open threaded video driver ... Exiting ...\n");
goto error;
}
}
else
#endif
video_driver_data = current_video->init(&video, input_get_double_ptr(),
input_driver_get_data_ptr());
if (!video_driver_data)
{
RARCH_ERR("Cannot open video driver ... Exiting ...\n");
goto error;
}
video_driver_poke = NULL;
if (current_video->poke_interface)
current_video->poke_interface(video_driver_data, &video_driver_poke);
if (current_video->viewport_info && (!custom_vp->width ||
!custom_vp->height))
{
/* Force custom viewport to have sane parameters. */
custom_vp->width = width;
custom_vp->height = height;
video_driver_get_viewport_info(custom_vp);
}
video_driver_set_rotation(
(settings->video.rotation + system->rotation) % 4);
current_video->suppress_screensaver(video_driver_data,
settings->ui.suspend_screensaver_enable);
init_video_input(tmp);
event_cmd_ctl(EVENT_CMD_OVERLAY_DEINIT, NULL);
event_cmd_ctl(EVENT_CMD_OVERLAY_INIT, NULL);
video_driver_cached_frame_set(&dummy_pixels, 4, 4, 8);
#if defined(PSP)
video_driver_set_texture_frame(&dummy_pixels, false, 1, 1, 1.0f);
#endif
return true;
error:
retroarch_fail(1, "init_video()");
return false;
}
bool video_driver_set_viewport(unsigned width, unsigned height,
bool force_fullscreen, bool allow_rotate)
{
if (!current_video || !current_video->set_viewport)
return false;
current_video->set_viewport(video_driver_data, width, height,
force_fullscreen, allow_rotate);
return true;
}
bool video_driver_set_rotation(unsigned rotation)
{
if (!current_video || !current_video->set_rotation)
return false;
current_video->set_rotation(video_driver_data, rotation);
return true;
}
bool video_driver_set_video_mode(unsigned width,
unsigned height, bool fullscreen)
{
gfx_ctx_mode_t mode;
if (video_driver_poke && video_driver_poke->set_video_mode)
{
video_driver_poke->set_video_mode(video_driver_data,
width, height, fullscreen);
return true;
}
mode.width = width;
mode.height = height;
mode.fullscreen = fullscreen;
return video_context_driver_set_video_mode(&mode);
}
bool video_driver_get_video_output_size(unsigned *width, unsigned *height)
{
if (!video_driver_poke || !video_driver_poke->get_video_output_size)
return false;
video_driver_poke->get_video_output_size(video_driver_data,
width, height);
return true;
}
void video_driver_set_osd_msg(const char *msg,
const struct font_params *params, void *font)
{
if (video_driver_poke && video_driver_poke->set_osd_msg)
video_driver_poke->set_osd_msg(video_driver_data, msg, params, font);
}
void video_driver_set_texture_enable(bool enable, bool fullscreen)
{
if (video_driver_poke && video_driver_poke->set_texture_enable)
video_driver_poke->set_texture_enable(video_driver_data,
enable, fullscreen);
}
void video_driver_set_texture_frame(const void *frame, bool rgb32,
unsigned width, unsigned height, float alpha)
{
#ifdef HAVE_MENU
if (video_driver_poke && video_driver_poke->set_texture_frame)
video_driver_poke->set_texture_frame(video_driver_data,
frame, rgb32, width, height, alpha);
#endif
}
#ifdef HAVE_OVERLAY
bool video_driver_overlay_interface(const video_overlay_interface_t **iface)
{
if (!current_video || !current_video->overlay_interface)
return false;
current_video->overlay_interface(video_driver_data, iface);
return true;
}
#endif
void *video_driver_read_frame_raw(unsigned *width,
unsigned *height, size_t *pitch)
{
if (!current_video || !current_video->read_frame_raw)
return NULL;
return current_video->read_frame_raw(video_driver_data, width,
height, pitch);
}
void video_driver_set_filtering(unsigned index, bool smooth)
{
if (video_driver_poke && video_driver_poke->set_filtering)
video_driver_poke->set_filtering(video_driver_data, index, smooth);
}
void video_driver_cached_frame_set(const void *data, unsigned width,
unsigned height, size_t pitch)
{
video_driver_set_cached_frame_ptr(data);
video_driver_state.frame_cache.width = width;
video_driver_state.frame_cache.height = height;
video_driver_state.frame_cache.pitch = pitch;
}
void video_driver_cached_frame_get(const void **data, unsigned *width,
unsigned *height, size_t *pitch)
{
if (data)
*data = video_driver_state.frame_cache.data;
if (width)
*width = video_driver_state.frame_cache.width;
if (height)
*height = video_driver_state.frame_cache.height;
if (pitch)
*pitch = video_driver_state.frame_cache.pitch;
}
void video_driver_get_size(unsigned *width, unsigned *height)
{
if (width)
*width = video_driver_state.video_width;
if (height)
*height = video_driver_state.video_height;
}
void video_driver_set_size(unsigned *width, unsigned *height)
{
if (width)
video_driver_state.video_width = *width;
if (height)
video_driver_state.video_height = *height;
}
/**
* video_monitor_set_refresh_rate:
* @hz : New refresh rate for monitor.
*
* Sets monitor refresh rate to new value.
**/
void video_monitor_set_refresh_rate(float hz)
{
char msg[128];
settings_t *settings = config_get_ptr();
snprintf(msg, sizeof(msg),
"Setting refresh rate to: %.3f Hz.", hz);
runloop_msg_queue_push(msg, 1, 180, false);
RARCH_LOG("%s\n", msg);
settings->video.refresh_rate = hz;
}
/**
* video_monitor_fps_statistics
* @refresh_rate : Monitor refresh rate.
* @deviation : Deviation from measured refresh rate.
* @sample_points : Amount of sampled points.
*
* Gets the monitor FPS statistics based on the current
* runtime.
*
* Returns: true (1) on success.
* false (0) if:
* a) threaded video mode is enabled
* b) less than 2 frame time samples.
* c) FPS monitor enable is off.
**/
bool video_monitor_fps_statistics(double *refresh_rate,
double *deviation, unsigned *sample_points)
{
unsigned i;
retro_time_t accum = 0, avg, accum_var = 0;
settings_t *settings = config_get_ptr();
unsigned samples = MIN(MEASURE_FRAME_TIME_SAMPLES_COUNT,
video_driver_state.frame_time.count);
if (settings->video.threaded || (samples < 2))
return false;
/* Measure statistics on frame time (microsecs), *not* FPS. */
for (i = 0; i < samples; i++)
accum += video_driver_state.frame_time.samples[i];
#if 0
for (i = 0; i < samples; i++)
RARCH_LOG("Interval #%u: %d usec / frame.\n",
i, (int)video_driver_state.frame_time.samples[i]);
#endif
avg = accum / samples;
/* Drop first measurement. It is likely to be bad. */
for (i = 0; i < samples; i++)
{
retro_time_t diff = video_driver_state.frame_time.samples[i] - avg;
accum_var += diff * diff;
}
*deviation = sqrt((double)accum_var / (samples - 1)) / avg;
*refresh_rate = 1000000.0 / avg;
*sample_points = samples;
return true;
}
/**
* video_monitor_get_fps:
* @buf : string suitable for Window title
* @size : size of buffer.
* @buf_fps : string of raw FPS only (optional).
* @size_fps : size of raw FPS buffer.
*
* Get the amount of frames per seconds.
*
* Returns: true if framerate per seconds could be obtained,
* otherwise false.
*
**/
bool video_monitor_get_fps(char *buf, size_t size,
char *buf_fps, size_t size_fps)
{
static retro_time_t curr_time;
static retro_time_t fps_time;
retro_time_t new_time = retro_get_time_usec();
*buf = '\0';
if (video_driver_frame_count)
{
static float last_fps;
bool ret = false;
unsigned write_index = video_driver_state.frame_time.count++ &
(MEASURE_FRAME_TIME_SAMPLES_COUNT - 1);
video_driver_state.frame_time.samples[write_index] = new_time - fps_time;
fps_time = new_time;
if ((video_driver_frame_count % FPS_UPDATE_INTERVAL) == 0)
{