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video_thread_wrapper.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 <stdlib.h>
#include <string.h>
#include <limits.h>
#include <compat/strl.h>
#include <features/features_cpu.h>
#include <rthreads/rthreads.h>
#include <string/stdstring.h>
#include "video_thread_wrapper.h"
#include "font_driver.h"
#include "../retroarch.h"
#include "../verbosity.h"
enum thread_cmd
{
CMD_VIDEO_NONE = 0,
CMD_INIT,
CMD_SET_SHADER,
CMD_FREE,
CMD_ALIVE, /* Blocking alive check. Used when paused. */
CMD_SET_VIEWPORT,
CMD_SET_ROTATION,
CMD_READ_VIEWPORT,
CMD_OVERLAY_ENABLE,
CMD_OVERLAY_LOAD,
CMD_OVERLAY_TEX_GEOM,
CMD_OVERLAY_VERTEX_GEOM,
CMD_OVERLAY_FULL_SCREEN,
CMD_POKE_SET_VIDEO_MODE,
CMD_POKE_SET_FILTERING,
CMD_POKE_SET_FBO_STATE,
CMD_POKE_GET_FBO_STATE,
CMD_POKE_SET_ASPECT_RATIO,
CMD_POKE_SET_OSD_MSG,
CMD_FONT_INIT,
CMD_CUSTOM_COMMAND,
CMD_DUMMY = INT_MAX
};
struct thread_packet
{
enum thread_cmd type;
union
{
bool b;
int i;
float f;
const char *str;
void *v;
struct
{
enum rarch_shader_type type;
const char *path;
} set_shader;
struct
{
unsigned width;
unsigned height;
bool force_full;
bool allow_rotate;
} set_viewport;
struct
{
unsigned index;
float x, y, w, h;
} rect;
struct
{
const struct texture_image *data;
unsigned num;
} image;
struct
{
unsigned width;
unsigned height;
} output;
struct
{
unsigned width;
unsigned height;
bool fullscreen;
} new_mode;
struct
{
unsigned index;
bool smooth;
} filtering;
struct
{
char msg[128];
struct font_params params;
} osd_message;
struct
{
custom_command_method_t method;
void* data;
int return_value;
} custom_command;
struct
{
custom_font_command_method_t method;
const void **font_driver;
void **font_handle;
void *video_data;
const char *font_path;
float font_size;
bool return_value;
bool is_threaded;
enum font_driver_render_api api;
} font_init;
} data;
};
struct thread_video
{
slock_t *lock;
scond_t *cond_cmd;
scond_t *cond_thread;
sthread_t *thread;
video_info_t info;
const video_driver_t *driver;
#ifdef HAVE_OVERLAY
const video_overlay_interface_t *overlay;
#endif
const video_poke_interface_t *poke;
void *driver_data;
const input_driver_t **input;
void **input_data;
struct
{
void *frame;
size_t frame_cap;
unsigned width;
unsigned height;
float alpha;
bool frame_updated;
bool rgb32;
bool enable;
bool full_screen;
} texture;
bool apply_state_changes;
bool alive;
bool focus;
bool suppress_screensaver;
bool has_windowed;
bool nonblock;
bool is_idle;
retro_time_t last_time;
unsigned hit_count;
unsigned miss_count;
float *alpha_mod;
unsigned alpha_mods;
bool alpha_update;
slock_t *alpha_lock;
void (*send_and_wait)(struct thread_video *, thread_packet_t*);
enum thread_cmd send_cmd;
enum thread_cmd reply_cmd;
thread_packet_t cmd_data;
struct video_viewport vp;
struct video_viewport read_vp; /* Last viewport reported to caller. */
struct
{
slock_t *lock;
uint8_t *buffer;
unsigned width;
unsigned height;
unsigned pitch;
bool updated;
bool within_thread;
uint64_t count;
char msg[255];
} frame;
video_driver_t video_thread;
};
static void *video_thread_init_never_call(const video_info_t *video,
const input_driver_t **input, void **input_data)
{
(void)video;
(void)input;
(void)input_data;
RARCH_ERR("Sanity check fail! Threaded mustn't be reinit.\n");
abort();
return NULL;
}
/* thread -> user */
static void video_thread_reply(thread_video_t *thr, const thread_packet_t *pkt)
{
slock_lock(thr->lock);
thr->cmd_data = *pkt;
thr->reply_cmd = pkt->type;
thr->send_cmd = CMD_VIDEO_NONE;
scond_signal(thr->cond_cmd);
slock_unlock(thr->lock);
}
/* user -> thread */
static void video_thread_send_packet(thread_video_t *thr,
const thread_packet_t *pkt)
{
slock_lock(thr->lock);
thr->cmd_data = *pkt;
thr->send_cmd = pkt->type;
thr->reply_cmd = CMD_VIDEO_NONE;
scond_signal(thr->cond_thread);
slock_unlock(thr->lock);
}
/* user -> thread */
static void video_thread_wait_reply(thread_video_t *thr, thread_packet_t *pkt)
{
slock_lock(thr->lock);
while (pkt->type != thr->reply_cmd)
scond_wait(thr->cond_cmd, thr->lock);
*pkt = thr->cmd_data;
thr->cmd_data.type = CMD_VIDEO_NONE;
slock_unlock(thr->lock);
}
/* user -> thread */
static void video_thread_send_and_wait_user_to_thread(thread_video_t *thr, thread_packet_t *pkt)
{
video_thread_send_packet(thr, pkt);
video_thread_wait_reply(thr, pkt);
}
static void thread_update_driver_state(thread_video_t *thr)
{
#if defined(HAVE_MENU)
if (thr->texture.frame_updated)
{
if (thr->poke && thr->poke->set_texture_frame)
thr->poke->set_texture_frame(thr->driver_data,
thr->texture.frame, thr->texture.rgb32,
thr->texture.width, thr->texture.height,
thr->texture.alpha);
thr->texture.frame_updated = false;
}
if (thr->poke && thr->poke->set_texture_enable)
thr->poke->set_texture_enable(thr->driver_data,
thr->texture.enable, thr->texture.full_screen);
#endif
#if defined(HAVE_OVERLAY)
slock_lock(thr->alpha_lock);
if (thr->alpha_update)
{
unsigned i;
for (i = 0; i < thr->alpha_mods; i++)
{
if (thr->overlay && thr->overlay->set_alpha)
thr->overlay->set_alpha(thr->driver_data, i, thr->alpha_mod[i]);
}
thr->alpha_update = false;
}
slock_unlock(thr->alpha_lock);
#endif
if (thr->apply_state_changes)
{
if (thr->poke && thr->poke->apply_state_changes)
thr->poke->apply_state_changes(thr->driver_data);
thr->apply_state_changes = false;
}
}
/* returns true when video_thread_loop should quit */
static bool video_thread_handle_packet(
thread_video_t *thr,
const thread_packet_t *incoming)
{
#ifdef HAVE_OVERLAY
unsigned i;
#endif
thread_packet_t pkt = *incoming;
bool ret = false;
switch (pkt.type)
{
case CMD_INIT:
thr->driver_data = thr->driver->init(&thr->info,
thr->input, thr->input_data);
pkt.data.b = (thr->driver_data != NULL);
thr->driver->viewport_info(thr->driver_data, &thr->vp);
video_thread_reply(thr, &pkt);
break;
case CMD_FREE:
if (thr->driver_data)
{
if (thr->driver && thr->driver->free)
thr->driver->free(thr->driver_data);
}
thr->driver_data = NULL;
video_thread_reply(thr, &pkt);
return true;
case CMD_SET_ROTATION:
if (thr->driver && thr->driver->set_rotation)
thr->driver->set_rotation(thr->driver_data, pkt.data.i);
video_thread_reply(thr, &pkt);
break;
case CMD_READ_VIEWPORT:
{
struct video_viewport vp;
vp.x = 0;
vp.y = 0;
vp.width = 0;
vp.height = 0;
vp.full_width = 0;
vp.full_height = 0;
thr->driver->viewport_info(thr->driver_data, &vp);
if (string_is_equal_fast(&vp, &thr->read_vp, sizeof(vp)))
{
/* We can read safely
*
* read_viewport() in GL driver calls
* 'cached frame render' to be able to read from
* back buffer.
*
* This means frame() callback in threaded wrapper will
* be called from this thread, causing a timeout, and
* no frame to be rendered.
*
* To avoid this, set a flag so wrapper can see if
* it's called in this "special" way. */
thr->frame.within_thread = true;
if (thr->driver->read_viewport)
ret = thr->driver->read_viewport(thr->driver_data,
(uint8_t*)pkt.data.v, thr->is_idle);
pkt.data.b = ret;
thr->frame.within_thread = false;
}
else
{
/* Viewport dimensions changed right after main
* thread read the async value. Cannot read safely. */
pkt.data.b = false;
}
video_thread_reply(thr, &pkt);
break;
}
case CMD_SET_SHADER:
if (thr->driver && thr->driver->set_shader)
ret = thr->driver->set_shader(thr->driver_data,
pkt.data.set_shader.type,
pkt.data.set_shader.path);
pkt.data.b = ret;
video_thread_reply(thr, &pkt);
break;
case CMD_ALIVE:
if (thr->driver && thr->driver->alive)
ret = thr->driver->alive(thr->driver_data);
pkt.data.b = ret;
video_thread_reply(thr, &pkt);
break;
#ifdef HAVE_OVERLAY
case CMD_OVERLAY_ENABLE:
if (thr->overlay && thr->overlay->enable)
thr->overlay->enable(thr->driver_data, pkt.data.b);
video_thread_reply(thr, &pkt);
break;
case CMD_OVERLAY_LOAD:
if (thr->overlay && thr->overlay->load)
ret = thr->overlay->load(thr->driver_data,
pkt.data.image.data,
pkt.data.image.num);
pkt.data.b = ret;
thr->alpha_mods = pkt.data.image.num;
thr->alpha_mod = (float*)realloc(thr->alpha_mod,
thr->alpha_mods * sizeof(float));
for (i = 0; i < thr->alpha_mods; i++)
{
/* Avoid temporary garbage data. */
thr->alpha_mod[i] = 1.0f;
}
video_thread_reply(thr, &pkt);
break;
case CMD_OVERLAY_TEX_GEOM:
if (thr->overlay && thr->overlay->tex_geom)
thr->overlay->tex_geom(thr->driver_data,
pkt.data.rect.index,
pkt.data.rect.x,
pkt.data.rect.y,
pkt.data.rect.w,
pkt.data.rect.h);
video_thread_reply(thr, &pkt);
break;
case CMD_OVERLAY_VERTEX_GEOM:
if (thr->overlay && thr->overlay->vertex_geom)
thr->overlay->vertex_geom(thr->driver_data,
pkt.data.rect.index,
pkt.data.rect.x,
pkt.data.rect.y,
pkt.data.rect.w,
pkt.data.rect.h);
video_thread_reply(thr, &pkt);
break;
case CMD_OVERLAY_FULL_SCREEN:
if (thr->overlay && thr->overlay->full_screen)
thr->overlay->full_screen(thr->driver_data,
pkt.data.b);
video_thread_reply(thr, &pkt);
break;
#endif
case CMD_POKE_SET_VIDEO_MODE:
if (thr->poke && thr->poke->set_video_mode)
thr->poke->set_video_mode(thr->driver_data,
pkt.data.new_mode.width,
pkt.data.new_mode.height,
pkt.data.new_mode.fullscreen);
video_thread_reply(thr, &pkt);
break;
case CMD_POKE_SET_FILTERING:
if (thr->poke && thr->poke->set_filtering)
thr->poke->set_filtering(thr->driver_data,
pkt.data.filtering.index,
pkt.data.filtering.smooth);
video_thread_reply(thr, &pkt);
break;
case CMD_POKE_SET_ASPECT_RATIO:
if (thr->poke && thr->poke->set_aspect_ratio)
thr->poke->set_aspect_ratio(thr->driver_data,
pkt.data.i);
video_thread_reply(thr, &pkt);
break;
case CMD_POKE_SET_OSD_MSG:
{
video_frame_info_t video_info;
video_driver_build_info(&video_info);
if (thr->poke && thr->poke->set_osd_msg)
thr->poke->set_osd_msg(thr->driver_data,
&video_info,
pkt.data.osd_message.msg,
&pkt.data.osd_message.params, NULL);
}
video_thread_reply(thr, &pkt);
break;
case CMD_FONT_INIT:
if (pkt.data.font_init.method)
pkt.data.font_init.return_value =
pkt.data.font_init.method
(pkt.data.font_init.font_driver,
pkt.data.font_init.font_handle,
pkt.data.font_init.video_data,
pkt.data.font_init.font_path,
pkt.data.font_init.font_size,
pkt.data.font_init.api,
pkt.data.font_init.is_threaded);
video_thread_reply(thr, &pkt);
break;
case CMD_CUSTOM_COMMAND:
if (pkt.data.custom_command.method)
pkt.data.custom_command.return_value =
pkt.data.custom_command.method
(pkt.data.custom_command.data);
video_thread_reply(thr, &pkt);
break;
case CMD_VIDEO_NONE:
/* Never reply on no command. Possible deadlock if
* thread sends command right after frame update. */
break;
default:
video_thread_reply(thr, &pkt);
break;
}
return false;
}
static void video_thread_loop(void *data)
{
thread_video_t *thr = (thread_video_t*)data;
for (;;)
{
thread_packet_t pkt;
bool updated = false;
slock_lock(thr->lock);
while (thr->send_cmd == CMD_VIDEO_NONE && !thr->frame.updated)
scond_wait(thr->cond_thread, thr->lock);
if (thr->frame.updated)
updated = true;
/* To avoid race condition where send_cmd is updated
* right after the switch is checked. */
pkt = thr->cmd_data;
slock_unlock(thr->lock);
if (video_thread_handle_packet(thr, &pkt))
return;
if (updated)
{
struct video_viewport vp;
bool ret = false;
bool alive = false;
bool focus = false;
bool has_windowed = true;
vp.x = 0;
vp.y = 0;
vp.width = 0;
vp.height = 0;
vp.full_width = 0;
vp.full_height = 0;
slock_lock(thr->frame.lock);
thread_update_driver_state(thr);
if (thr->driver && thr->driver->frame)
{
video_frame_info_t video_info;
video_driver_build_info(&video_info);
ret = thr->driver->frame(thr->driver_data,
thr->frame.buffer, thr->frame.width, thr->frame.height,
thr->frame.count,
thr->frame.pitch, *thr->frame.msg ? thr->frame.msg : NULL,
&video_info);
}
slock_unlock(thr->frame.lock);
if (thr->driver && thr->driver->alive)
alive = ret && thr->driver->alive(thr->driver_data);
if (thr->driver && thr->driver->focus)
focus = ret && thr->driver->focus(thr->driver_data);
if (thr->driver && thr->driver->has_windowed)
has_windowed = ret && thr->driver->has_windowed(thr->driver_data);
if (thr->driver && thr->driver->viewport_info)
thr->driver->viewport_info(thr->driver_data, &vp);
slock_lock(thr->lock);
thr->alive = alive;
thr->focus = focus;
thr->has_windowed = has_windowed;
thr->frame.updated = false;
thr->vp = vp;
scond_signal(thr->cond_cmd);
slock_unlock(thr->lock);
}
}
}
static bool video_thread_alive(void *data)
{
bool ret;
thread_video_t *thr = (thread_video_t*)data;
if (rarch_ctl(RARCH_CTL_IS_PAUSED, NULL))
{
thread_packet_t pkt = { CMD_ALIVE };
video_thread_send_and_wait_user_to_thread(thr, &pkt);
return pkt.data.b;
}
slock_lock(thr->lock);
ret = thr->alive;
slock_unlock(thr->lock);
return ret;
}
static bool video_thread_focus(void *data)
{
bool ret;
thread_video_t *thr = (thread_video_t*)data;
slock_lock(thr->lock);
ret = thr->focus;
slock_unlock(thr->lock);
return ret;
}
static bool video_thread_suppress_screensaver(void *data, bool enable)
{
bool ret;
thread_video_t *thr = (thread_video_t*)data;
slock_lock(thr->lock);
ret = thr->suppress_screensaver;
slock_unlock(thr->lock);
return ret;
}
static bool video_thread_has_windowed(void *data)
{
bool ret;
thread_video_t *thr = (thread_video_t*)data;
slock_lock(thr->lock);
ret = thr->has_windowed;
slock_unlock(thr->lock);
return ret;
}
static bool video_thread_frame(void *data, const void *frame_,
unsigned width, unsigned height, uint64_t frame_count,
unsigned pitch, const char *msg, video_frame_info_t *video_info)
{
unsigned copy_stride;
const uint8_t *src = NULL;
uint8_t *dst = NULL;
thread_video_t *thr = (thread_video_t*)data;
/* If called from within read_viewport, we're actually in the
* driver thread, so just render directly. */
if (thr->frame.within_thread)
{
thread_update_driver_state(thr);
if (thr->driver && thr->driver->frame)
return thr->driver->frame(thr->driver_data, frame_,
width, height, frame_count, pitch, msg, video_info);
return false;
}
copy_stride = width * (thr->info.rgb32
? sizeof(uint32_t) : sizeof(uint16_t));
src = (const uint8_t*)frame_;
dst = thr->frame.buffer;
slock_lock(thr->lock);
if (!thr->nonblock)
{
retro_time_t target_frame_time = (retro_time_t)
roundf(1000000 / video_info->refresh_rate);
retro_time_t target = thr->last_time + target_frame_time;
/* Ideally, use absolute time, but that is only a good idea on POSIX. */
while (thr->frame.updated)
{
retro_time_t current = cpu_features_get_time_usec();
retro_time_t delta = target - current;
if (delta <= 0)
break;
if (!scond_wait_timeout(thr->cond_cmd, thr->lock, delta))
break;
}
}
/* Drop frame if updated flag is still set, as thread is
* still working on last frame. */
if (!thr->frame.updated)
{
if (src)
{
unsigned h;
for (h = 0; h < height; h++, src += pitch, dst += copy_stride)
memcpy(dst, src, copy_stride);
}
thr->frame.updated = true;
thr->frame.width = width;
thr->frame.height = height;
thr->frame.count = frame_count;
thr->frame.pitch = copy_stride;
if (msg)
strlcpy(thr->frame.msg, msg, sizeof(thr->frame.msg));
else
*thr->frame.msg = '\0';
scond_signal(thr->cond_thread);
#if defined(HAVE_MENU)
if (thr->texture.enable)
{
while (thr->frame.updated)
scond_wait(thr->cond_cmd, thr->lock);
}
#endif
thr->hit_count++;
}
else
thr->miss_count++;
slock_unlock(thr->lock);
thr->last_time = cpu_features_get_time_usec();
return true;
}
static void video_thread_set_nonblock_state(void *data, bool state)
{
thread_video_t *thr = (thread_video_t*)data;
if (thr)
thr->nonblock = state;
}
static bool video_thread_init(thread_video_t *thr,
const video_info_t info,
const input_driver_t **input, void **input_data)
{
size_t max_size;
thread_packet_t pkt = {CMD_INIT};
thr->lock = slock_new();
thr->alpha_lock = slock_new();
thr->frame.lock = slock_new();
thr->cond_cmd = scond_new();
thr->cond_thread = scond_new();
thr->input = input;
thr->input_data = input_data;
thr->info = info;
thr->alive = true;
thr->focus = true;
thr->has_windowed = true;
thr->suppress_screensaver = true;
max_size = info.input_scale * RARCH_SCALE_BASE;
max_size *= max_size;
max_size *= info.rgb32 ? sizeof(uint32_t) : sizeof(uint16_t);
thr->frame.buffer = (uint8_t*)malloc(max_size);
if (!thr->frame.buffer)
return false;
memset(thr->frame.buffer, 0x80, max_size);
thr->last_time = cpu_features_get_time_usec();
thr->thread = sthread_create(video_thread_loop, thr);
if (!thr->thread)
return false;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
thr->send_and_wait = video_thread_send_and_wait_user_to_thread;
return pkt.data.b;
}
static bool video_thread_set_shader(void *data,
enum rarch_shader_type type, const char *path)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = {CMD_SET_SHADER};
if (!thr)
return false;
pkt.data.set_shader.type = type;
pkt.data.set_shader.path = path;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
return pkt.data.b;
}
static void video_thread_set_viewport(void *data, unsigned width,
unsigned height, bool force_full, bool allow_rotate)
{
thread_video_t *thr = (thread_video_t*)data;
if (!thr)
return;
slock_lock(thr->lock);
if (thr->driver && thr->driver->set_viewport)
thr->driver->set_viewport(thr->driver_data, width, height,
force_full, allow_rotate);
slock_unlock(thr->lock);
}
static void video_thread_set_rotation(void *data, unsigned rotation)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = { CMD_SET_ROTATION };
if (!thr)
return;
pkt.data.i = rotation;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
}
/* This value is set async as stalling on the video driver for
* every query is too slow.
*
* This means this value might not be correct, so viewport
* reads are not supported for now. */
static void video_thread_viewport_info(void *data, struct video_viewport *vp)
{
thread_video_t *thr = (thread_video_t*)data;
if (!thr)
return;
slock_lock(thr->lock);
*vp = thr->vp;
/* Explicitly mem-copied so we can use memcmp correctly later. */
memcpy(&thr->read_vp, &thr->vp, sizeof(thr->vp));
slock_unlock(thr->lock);
}
static bool video_thread_read_viewport(void *data, uint8_t *buffer, bool is_idle)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = { CMD_READ_VIEWPORT };
if (!thr)
return false;
pkt.data.v = buffer;
thr->is_idle = is_idle;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
return pkt.data.b;
}
static void video_thread_free(void *data)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = { CMD_FREE };
if (!thr)
return;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
sthread_join(thr->thread);
#if defined(HAVE_MENU)
free(thr->texture.frame);
#endif
free(thr->frame.buffer);
slock_free(thr->frame.lock);
slock_free(thr->lock);
scond_free(thr->cond_cmd);
scond_free(thr->cond_thread);
free(thr->alpha_mod);
slock_free(thr->alpha_lock);
RARCH_LOG("Threaded video stats: Frames pushed: %u, Frames dropped: %u.\n",
thr->hit_count, thr->miss_count);
free(thr);
}
#ifdef HAVE_OVERLAY
static void thread_overlay_enable(void *data, bool state)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = { CMD_OVERLAY_ENABLE };
if (!thr)
return;
pkt.data.b = state;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
}
static bool thread_overlay_load(void *data,
const void *image_data, unsigned num_images)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = { CMD_OVERLAY_LOAD };
const struct texture_image *images =
(const struct texture_image*)image_data;
if (!thr)
return false;
pkt.data.image.data = images;
pkt.data.image.num = num_images;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
return pkt.data.b;
}
static void thread_overlay_tex_geom(void *data,
unsigned idx, float x, float y, float w, float h)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = { CMD_OVERLAY_TEX_GEOM };
if (!thr)
return;
pkt.data.rect.index = idx;
pkt.data.rect.x = x;
pkt.data.rect.y = y;
pkt.data.rect.w = w;
pkt.data.rect.h = h;
video_thread_send_and_wait_user_to_thread(thr, &pkt);
}
static void thread_overlay_vertex_geom(void *data,
unsigned idx, float x, float y, float w, float h)
{
thread_video_t *thr = (thread_video_t*)data;
thread_packet_t pkt = { CMD_OVERLAY_VERTEX_GEOM };
if (!thr)
return;