obs-studio/libobs/obs-video.c

161 lines
3.9 KiB
C

/******************************************************************************
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
This program 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 Foundation, either version 2 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include "obs.h"
#include "obs-data.h"
#include "graphics/vec4.h"
static void tick_sources(uint64_t cur_time, uint64_t *last_time)
{
size_t i;
uint64_t delta_time;
float seconds;
if (!last_time)
*last_time = cur_time - video_getframetime(obs->video.video);
delta_time = cur_time - *last_time;
seconds = (float)((double)delta_time / 1000000000.0);
for (i = 0; i < obs->data.sources.num; i++)
obs_source_video_tick(obs->data.sources.array[i], seconds);
*last_time = cur_time;
}
static inline void render_begin(struct obs_display *display)
{
struct vec4 clear_color;
uint32_t width, height;
gs_load_swapchain(display ? display->swap : NULL);
gs_getsize(&width, &height);
gs_beginscene();
vec4_set(&clear_color, 0.3f, 0.0f, 0.0f, 1.0f);
gs_clear(GS_CLEAR_COLOR | GS_CLEAR_DEPTH | GS_CLEAR_STENCIL,
&clear_color, 1.0f, 0);
gs_enable_depthtest(false);
/* gs_enable_blending(false); */
gs_setcullmode(GS_NEITHER);
gs_ortho(0.0f, (float)width, 0.0f, (float)height, -100.0f, 100.0f);
gs_setviewport(0, 0, width, height);
}
static inline void render_end(struct obs_display *display)
{
gs_endscene();
gs_present();
}
static void render_display(struct obs_display *display)
{
size_t i;
render_begin(display);
for (i = 0; i < MAX_CHANNELS; i++) {
struct obs_source **p_source;
p_source = (display) ? display->channels+i :
obs->data.channels+i;
if (*p_source) {
if ((*p_source)->removed) {
obs_source_release(*p_source);
*p_source = NULL;
} else {
obs_source_video_render(*p_source);
}
}
}
render_end(display);
}
static inline void render_displays(void)
{
size_t i;
/* render extra displays/swaps */
pthread_mutex_lock(&obs->data.displays_mutex);
for (i = 0; i < obs->data.displays.num; i++) {
render_display(obs->data.displays.array[i]);
}
pthread_mutex_unlock(&obs->data.displays_mutex);
/* render main display */
render_display(NULL);
}
static bool swap_frame(uint64_t timestamp)
{
struct obs_video *video = &obs->video;
stagesurf_t last_surface = video->copy_surfaces[video->cur_texture];
stagesurf_t surface;
struct video_frame frame;
/* the last frame stays mapped until rendering starts with the next */
if (video->copy_mapped) {
stagesurface_unmap(last_surface);
video->copy_mapped = false;
}
video->textures_copied[video->cur_texture] = true;
/* TODO: texture staging */
//gs_stage_texture(last_surface, );
if (++video->cur_texture == NUM_TEXTURES)
video->cur_texture = 0;
if (video->textures_copied[video->cur_texture]) {
surface = video->copy_surfaces[video->cur_texture];
video->copy_mapped = stagesurface_map(surface, &frame.data,
&frame.row_size);
if (video->copy_mapped) {
frame.timestamp = timestamp;
video_output_frame(video->video, &frame);
}
}
return video->copy_mapped;
}
void *obs_video_thread(void *param)
{
uint64_t last_time = 0;
while (video_output_wait(obs->video.video)) {
uint64_t cur_time = video_gettime(obs->video.video);
gs_entercontext(obs_graphics());
tick_sources(cur_time, &last_time);
render_displays();
swap_frame(cur_time);
gs_leavecontext();
}
return NULL;
}