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obs-studio/libobs/obs-scene.c

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/******************************************************************************
Copyright (C) 2013-2015 by Hugh Bailey <obs.jim@gmail.com>
Philippe Groarke <philippe.groarke@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 "util/threading.h"
#include "graphics/math-defs.h"
#include "obs-scene.h"
/* NOTE: For proper mutex lock order (preventing mutual cross-locks), never
* lock the graphics mutex inside either of the scene mutexes.
*
* Another thing that must be done to prevent that cross-lock (and improve
* performance), is to not create/release/update sources within the scene
* mutexes.
*
* It's okay to lock the graphics mutex before locking either of the scene
* mutexes, but not after.
*/
static const char *obs_scene_signals[] = {
"void item_add(ptr scene, ptr item)",
"void item_remove(ptr scene, ptr item)",
"void reorder(ptr scene)",
"void item_visible(ptr scene, ptr item, bool visible)",
"void item_select(ptr scene, ptr item)",
"void item_deselect(ptr scene, ptr item)",
"void item_transform(ptr scene, ptr item)",
NULL
};
static inline void signal_item_remove(struct obs_scene_item *item)
{
struct calldata params;
uint8_t stack[128];
calldata_init_fixed(&params, stack, sizeof(stack));
calldata_set_ptr(&params, "scene", item->parent);
calldata_set_ptr(&params, "item", item);
signal_handler_signal(item->parent->source->context.signals,
"item_remove", &params);
}
static const char *scene_getname(void *unused)
{
UNUSED_PARAMETER(unused);
return "Scene";
}
static void *scene_create(obs_data_t *settings, struct obs_source *source)
{
pthread_mutexattr_t attr;
struct obs_scene *scene = bmalloc(sizeof(struct obs_scene));
scene->source = source;
scene->first_item = NULL;
signal_handler_add_array(obs_source_get_signal_handler(source),
obs_scene_signals);
scene->id_counter = 0;
if (pthread_mutexattr_init(&attr) != 0)
goto fail;
if (pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) != 0)
goto fail;
if (pthread_mutex_init(&scene->audio_mutex, &attr) != 0) {
blog(LOG_ERROR, "scene_create: Couldn't initialize audio "
"mutex");
goto fail;
}
if (pthread_mutex_init(&scene->video_mutex, &attr) != 0) {
blog(LOG_ERROR, "scene_create: Couldn't initialize video "
"mutex");
goto fail;
}
UNUSED_PARAMETER(settings);
return scene;
fail:
pthread_mutexattr_destroy(&attr);
bfree(scene);
return NULL;
}
#define audio_lock(scene) pthread_mutex_lock(&scene->audio_mutex)
#define video_lock(scene) pthread_mutex_lock(&scene->video_mutex)
#define audio_unlock(scene) pthread_mutex_unlock(&scene->audio_mutex)
#define video_unlock(scene) pthread_mutex_unlock(&scene->video_mutex)
static inline void full_lock(struct obs_scene *scene)
{
video_lock(scene);
audio_lock(scene);
}
static inline void full_unlock(struct obs_scene *scene)
{
audio_unlock(scene);
video_unlock(scene);
}
static void set_visibility(struct obs_scene_item *item, bool vis);
static inline void detach_sceneitem(struct obs_scene_item *item);
static inline void remove_without_release(struct obs_scene_item *item)
{
item->removed = true;
set_visibility(item, false);
signal_item_remove(item);
detach_sceneitem(item);
}
static void remove_all_items(struct obs_scene *scene)
{
struct obs_scene_item *item;
DARRAY(struct obs_scene_item*) items;
da_init(items);
full_lock(scene);
item = scene->first_item;
while (item) {
struct obs_scene_item *del_item = item;
item = item->next;
remove_without_release(del_item);
da_push_back(items, &del_item);
}
full_unlock(scene);
for (size_t i = 0; i < items.num; i++)
obs_sceneitem_release(items.array[i]);
da_free(items);
}
static void scene_destroy(void *data)
{
struct obs_scene *scene = data;
remove_all_items(scene);
pthread_mutex_destroy(&scene->video_mutex);
pthread_mutex_destroy(&scene->audio_mutex);
bfree(scene);
}
static void scene_enum_sources(void *data,
obs_source_enum_proc_t enum_callback,
void *param, bool active)
{
struct obs_scene *scene = data;
struct obs_scene_item *item;
struct obs_scene_item *next;
full_lock(scene);
item = scene->first_item;
while (item) {
next = item->next;
obs_sceneitem_addref(item);
if (!active || os_atomic_load_long(&item->active_refs) > 0)
enum_callback(scene->source, item->source, param);
obs_sceneitem_release(item);
item = next;
}
full_unlock(scene);
}
static void scene_enum_active_sources(void *data,
obs_source_enum_proc_t enum_callback,
void *param)
{
scene_enum_sources(data, enum_callback, param, true);
}
static void scene_enum_all_sources(void *data,
obs_source_enum_proc_t enum_callback,
void *param)
{
scene_enum_sources(data, enum_callback, param, false);
}
static inline void detach_sceneitem(struct obs_scene_item *item)
{
if (item->prev)
item->prev->next = item->next;
else
item->parent->first_item = item->next;
if (item->next)
item->next->prev = item->prev;
item->parent = NULL;
}
static inline void attach_sceneitem(struct obs_scene *parent,
struct obs_scene_item *item, struct obs_scene_item *prev)
{
item->prev = prev;
item->parent = parent;
if (prev) {
item->next = prev->next;
if (prev->next)
prev->next->prev = item;
prev->next = item;
} else {
item->next = parent->first_item;
if (parent->first_item)
parent->first_item->prev = item;
parent->first_item = item;
}
}
void add_alignment(struct vec2 *v, uint32_t align, int cx, int cy)
{
if (align & OBS_ALIGN_RIGHT)
v->x += (float)cx;
else if ((align & OBS_ALIGN_LEFT) == 0)
v->x += (float)(cx / 2);
if (align & OBS_ALIGN_BOTTOM)
v->y += (float)cy;
else if ((align & OBS_ALIGN_TOP) == 0)
v->y += (float)(cy / 2);
}
static void calculate_bounds_data(struct obs_scene_item *item,
struct vec2 *origin, struct vec2 *scale,
uint32_t *cx, uint32_t *cy)
{
float width = (float)(*cx) * fabsf(scale->x);
float height = (float)(*cy) * fabsf(scale->y);
float item_aspect = width / height;
float bounds_aspect = item->bounds.x / item->bounds.y;
uint32_t bounds_type = item->bounds_type;
float width_diff, height_diff;
if (item->bounds_type == OBS_BOUNDS_MAX_ONLY)
if (width > item->bounds.x || height > item->bounds.y)
bounds_type = OBS_BOUNDS_SCALE_INNER;
if (bounds_type == OBS_BOUNDS_SCALE_INNER ||
bounds_type == OBS_BOUNDS_SCALE_OUTER) {
bool use_width = (bounds_aspect < item_aspect);
float mul;
if (item->bounds_type == OBS_BOUNDS_SCALE_OUTER)
use_width = !use_width;
mul = use_width ?
item->bounds.x / width :
item->bounds.y / height;
vec2_mulf(scale, scale, mul);
} else if (bounds_type == OBS_BOUNDS_SCALE_TO_WIDTH) {
vec2_mulf(scale, scale, item->bounds.x / width);
} else if (bounds_type == OBS_BOUNDS_SCALE_TO_HEIGHT) {
vec2_mulf(scale, scale, item->bounds.y / height);
} else if (bounds_type == OBS_BOUNDS_STRETCH) {
scale->x = item->bounds.x / (float)(*cx);
scale->y = item->bounds.y / (float)(*cy);
}
width = (float)(*cx) * scale->x;
height = (float)(*cy) * scale->y;
width_diff = item->bounds.x - width;
height_diff = item->bounds.y - height;
*cx = (uint32_t)item->bounds.x;
*cy = (uint32_t)item->bounds.y;
add_alignment(origin, item->bounds_align,
(int)-width_diff, (int)-height_diff);
}
static inline uint32_t calc_cx(const struct obs_scene_item *item,
uint32_t width)
{
uint32_t crop_cx = item->crop.left + item->crop.right;
return (crop_cx > width) ? 2 : (width - crop_cx);
}
static inline uint32_t calc_cy(const struct obs_scene_item *item,
uint32_t height)
{
uint32_t crop_cy = item->crop.top + item->crop.bottom;
return (crop_cy > height) ? 2 : (height - crop_cy);
}
static void update_item_transform(struct obs_scene_item *item)
{
uint32_t width = obs_source_get_width(item->source);
uint32_t height = obs_source_get_height(item->source);
uint32_t cx = calc_cx(item, width);
uint32_t cy = calc_cy(item, height);
struct vec2 base_origin;
struct vec2 origin;
struct vec2 scale = item->scale;
struct calldata params;
uint8_t stack[128];
if (os_atomic_load_long(&item->defer_update) > 0)
return;
width = cx;
height = cy;
vec2_zero(&base_origin);
vec2_zero(&origin);
/* ----------------------- */
if (item->bounds_type != OBS_BOUNDS_NONE) {
calculate_bounds_data(item, &origin, &scale, &cx, &cy);
} else {
cx = (uint32_t)((float)cx * scale.x);
cy = (uint32_t)((float)cy * scale.y);
}
add_alignment(&origin, item->align, (int)cx, (int)cy);
matrix4_identity(&item->draw_transform);
matrix4_scale3f(&item->draw_transform, &item->draw_transform,
scale.x, scale.y, 1.0f);
matrix4_translate3f(&item->draw_transform, &item->draw_transform,
-origin.x, -origin.y, 0.0f);
matrix4_rotate_aa4f(&item->draw_transform, &item->draw_transform,
0.0f, 0.0f, 1.0f, RAD(item->rot));
matrix4_translate3f(&item->draw_transform, &item->draw_transform,
item->pos.x, item->pos.y, 0.0f);
item->output_scale = scale;
/* ----------------------- */
if (item->bounds_type != OBS_BOUNDS_NONE) {
vec2_copy(&scale, &item->bounds);
} else {
scale.x = (float)width * item->scale.x;
scale.y = (float)height * item->scale.y;
}
add_alignment(&base_origin, item->align, (int)scale.x, (int)scale.y);
matrix4_identity(&item->box_transform);
matrix4_scale3f(&item->box_transform, &item->box_transform,
scale.x, scale.y, 1.0f);
matrix4_translate3f(&item->box_transform, &item->box_transform,
-base_origin.x, -base_origin.y, 0.0f);
matrix4_rotate_aa4f(&item->box_transform, &item->box_transform,
0.0f, 0.0f, 1.0f, RAD(item->rot));
matrix4_translate3f(&item->box_transform, &item->box_transform,
item->pos.x, item->pos.y, 0.0f);
/* ----------------------- */
item->last_width = width;
item->last_height = height;
calldata_init_fixed(&params, stack, sizeof(stack));
calldata_set_ptr(&params, "scene", item->parent);
calldata_set_ptr(&params, "item", item);
signal_handler_signal(item->parent->source->context.signals,
"item_transform", &params);
}
static inline bool source_size_changed(struct obs_scene_item *item)
{
uint32_t width = obs_source_get_width(item->source);
uint32_t height = obs_source_get_height(item->source);
return item->last_width != width || item->last_height != height;
}
static inline bool crop_enabled(const struct obs_sceneitem_crop *crop)
{
return crop->left || crop->right || crop->top || crop->bottom;
}
static inline bool scale_filter_enabled(const struct obs_scene_item *item)
{
return item->scale_filter != OBS_SCALE_DISABLE;
}
static inline bool item_is_scene(const struct obs_scene_item *item)
{
return item->source && item->source->info.type == OBS_SOURCE_TYPE_SCENE;
}
static inline bool item_texture_enabled(const struct obs_scene_item *item)
{
return crop_enabled(&item->crop) || scale_filter_enabled(item) ||
item_is_scene(item);
}
static void render_item_texture(struct obs_scene_item *item)
{
gs_texture_t *tex = gs_texrender_get_texture(item->item_render);
gs_effect_t *effect = obs->video.default_effect;
enum obs_scale_type type = item->scale_filter;
uint32_t cx = gs_texture_get_width(tex);
uint32_t cy = gs_texture_get_height(tex);
if (type != OBS_SCALE_DISABLE) {
if (type == OBS_SCALE_POINT) {
gs_eparam_t *image = gs_effect_get_param_by_name(
effect, "image");
gs_effect_set_next_sampler(image,
obs->video.point_sampler);
} else if (!close_float(item->output_scale.x, 1.0f, EPSILON) ||
!close_float(item->output_scale.y, 1.0f, EPSILON)) {
gs_eparam_t *scale_param;
if (item->output_scale.x < 0.5f ||
item->output_scale.y < 0.5f) {
effect = obs->video.bilinear_lowres_effect;
} else if (type == OBS_SCALE_BICUBIC) {
effect = obs->video.bicubic_effect;
} else if (type == OBS_SCALE_LANCZOS) {
effect = obs->video.lanczos_effect;
}
scale_param = gs_effect_get_param_by_name(effect,
"base_dimension_i");
if (scale_param) {
struct vec2 base_res_i = {
1.0f / (float)cx,
1.0f / (float)cy
};
gs_effect_set_vec2(scale_param, &base_res_i);
}
}
}
while (gs_effect_loop(effect, "Draw"))
obs_source_draw(tex, 0, 0, 0, 0, 0);
}
static inline void render_item(struct obs_scene_item *item)
{
if (item->item_render) {
uint32_t width = obs_source_get_width(item->source);
uint32_t height = obs_source_get_height(item->source);
uint32_t cx = calc_cx(item, width);
uint32_t cy = calc_cy(item, height);
if (cx && cy && gs_texrender_begin(item->item_render, cx, cy)) {
float cx_scale = (float)width / (float)cx;
float cy_scale = (float)height / (float)cy;
struct vec4 clear_color;
vec4_zero(&clear_color);
gs_clear(GS_CLEAR_COLOR, &clear_color, 0.0f, 0);
gs_ortho(0.0f, (float)width, 0.0f, (float)height,
-100.0f, 100.0f);
gs_matrix_scale3f(cx_scale, cy_scale, 1.0f);
gs_matrix_translate3f(
-(float)item->crop.left,
-(float)item->crop.top,
0.0f);
obs_source_video_render(item->source);
gs_texrender_end(item->item_render);
}
}
gs_matrix_push();
gs_matrix_mul(&item->draw_transform);
if (item->item_render) {
render_item_texture(item);
} else {
obs_source_video_render(item->source);
}
gs_matrix_pop();
}
static void scene_video_tick(void *data, float seconds)
{
struct obs_scene *scene = data;
struct obs_scene_item *item;
video_lock(scene);
item = scene->first_item;
while (item) {
if (item->item_render)
gs_texrender_reset(item->item_render);
item = item->next;
}
video_unlock(scene);
UNUSED_PARAMETER(seconds);
}
static void scene_video_render(void *data, gs_effect_t *effect)
{
DARRAY(struct obs_scene_item*) remove_items;
struct obs_scene *scene = data;
struct obs_scene_item *item;
da_init(remove_items);
video_lock(scene);
item = scene->first_item;
gs_blend_state_push();
gs_reset_blend_state();
while (item) {
if (obs_source_removed(item->source)) {
struct obs_scene_item *del_item = item;
item = item->next;
remove_without_release(del_item);
da_push_back(remove_items, &del_item);
continue;
}
if (source_size_changed(item))
update_item_transform(item);
if (item->user_visible)
render_item(item);
item = item->next;
}
gs_blend_state_pop();
video_unlock(scene);
for (size_t i = 0; i < remove_items.num; i++)
obs_sceneitem_release(remove_items.array[i]);
da_free(remove_items);
UNUSED_PARAMETER(effect);
}
static void set_visibility(struct obs_scene_item *item, bool vis)
{
pthread_mutex_lock(&item->actions_mutex);
da_resize(item->audio_actions, 0);
if (os_atomic_load_long(&item->active_refs) > 0) {
if (!vis)
obs_source_remove_active_child(item->parent->source,
item->source);
} else if (vis) {
obs_source_add_active_child(item->parent->source, item->source);
}
os_atomic_set_long(&item->active_refs, vis ? 1 : 0);
item->visible = vis;
item->user_visible = vis;
pthread_mutex_unlock(&item->actions_mutex);
}
static void scene_load_item(struct obs_scene *scene, obs_data_t *item_data)
{
const char *name = obs_data_get_string(item_data, "name");
obs_source_t *source = obs_get_source_by_name(name);
const char *scale_filter_str;
struct obs_scene_item *item;
bool visible;
bool lock;
if (!source) {
blog(LOG_WARNING, "[scene_load_item] Source %s not found!",
name);
return;
}
item = obs_scene_add(scene, source);
if (!item) {
blog(LOG_WARNING, "[scene_load_item] Could not add source '%s' "
"to scene '%s'!",
name, obs_source_get_name(scene->source));
obs_source_release(source);
return;
}
obs_data_set_default_int(item_data, "align",
OBS_ALIGN_TOP | OBS_ALIGN_LEFT);
if (obs_data_has_user_value(item_data, "id"))
item->id = obs_data_get_int(item_data, "id");
item->rot = (float)obs_data_get_double(item_data, "rot");
item->align = (uint32_t)obs_data_get_int(item_data, "align");
visible = obs_data_get_bool(item_data, "visible");
lock = obs_data_get_bool(item_data, "locked");
obs_data_get_vec2(item_data, "pos", &item->pos);
obs_data_get_vec2(item_data, "scale", &item->scale);
set_visibility(item, visible);
obs_sceneitem_set_locked(item, lock);
item->bounds_type =
(enum obs_bounds_type)obs_data_get_int(item_data,
"bounds_type");
item->bounds_align =
(uint32_t)obs_data_get_int(item_data, "bounds_align");
obs_data_get_vec2(item_data, "bounds", &item->bounds);
item->crop.left = (uint32_t)obs_data_get_int(item_data, "crop_left");
item->crop.top = (uint32_t)obs_data_get_int(item_data, "crop_top");
item->crop.right = (uint32_t)obs_data_get_int(item_data, "crop_right");
item->crop.bottom = (uint32_t)obs_data_get_int(item_data, "crop_bottom");
scale_filter_str = obs_data_get_string(item_data, "scale_filter");
item->scale_filter = OBS_SCALE_DISABLE;
if (scale_filter_str) {
if (astrcmpi(scale_filter_str, "point") == 0)
item->scale_filter = OBS_SCALE_POINT;
else if (astrcmpi(scale_filter_str, "bilinear") == 0)
item->scale_filter = OBS_SCALE_BILINEAR;
else if (astrcmpi(scale_filter_str, "bicubic") == 0)
item->scale_filter = OBS_SCALE_BICUBIC;
else if (astrcmpi(scale_filter_str, "lanczos") == 0)
item->scale_filter = OBS_SCALE_LANCZOS;
}
if (item->item_render && !item_texture_enabled(item)) {
obs_enter_graphics();
gs_texrender_destroy(item->item_render);
item->item_render = NULL;
obs_leave_graphics();
} else if (!item->item_render && item_texture_enabled(item)) {
obs_enter_graphics();
item->item_render = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
obs_leave_graphics();
}
obs_source_release(source);
update_item_transform(item);
}
static void scene_load(void *data, obs_data_t *settings)
{
struct obs_scene *scene = data;
obs_data_array_t *items = obs_data_get_array(settings, "items");
size_t count, i;
remove_all_items(scene);
if (!items) return;
count = obs_data_array_count(items);
for (i = 0; i < count; i++) {
obs_data_t *item_data = obs_data_array_item(items, i);
scene_load_item(scene, item_data);
obs_data_release(item_data);
}
if (obs_data_has_user_value(settings, "id_counter"))
scene->id_counter = obs_data_get_int(settings, "id_counter");
obs_data_array_release(items);
}
static void scene_save_item(obs_data_array_t *array,
struct obs_scene_item *item)
{
obs_data_t *item_data = obs_data_create();
const char *name = obs_source_get_name(item->source);
const char *scale_filter;
obs_data_set_string(item_data, "name", name);
obs_data_set_bool (item_data, "visible", item->user_visible);
obs_data_set_bool (item_data, "locked", item->locked);
obs_data_set_double(item_data, "rot", item->rot);
obs_data_set_vec2 (item_data, "pos", &item->pos);
obs_data_set_vec2 (item_data, "scale", &item->scale);
obs_data_set_int (item_data, "align", (int)item->align);
obs_data_set_int (item_data, "bounds_type", (int)item->bounds_type);
obs_data_set_int (item_data, "bounds_align", (int)item->bounds_align);
obs_data_set_vec2 (item_data, "bounds", &item->bounds);
obs_data_set_int (item_data, "crop_left", (int)item->crop.left);
obs_data_set_int (item_data, "crop_top", (int)item->crop.top);
obs_data_set_int (item_data, "crop_right", (int)item->crop.right);
obs_data_set_int (item_data, "crop_bottom", (int)item->crop.bottom);
obs_data_set_int (item_data, "id", item->id);
if (item->scale_filter == OBS_SCALE_POINT)
scale_filter = "point";
else if (item->scale_filter == OBS_SCALE_BILINEAR)
scale_filter = "bilinear";
else if (item->scale_filter == OBS_SCALE_BICUBIC)
scale_filter = "bicubic";
else if (item->scale_filter == OBS_SCALE_LANCZOS)
scale_filter = "lanczos";
else
scale_filter = "disable";
obs_data_set_string(item_data, "scale_filter", scale_filter);
obs_data_array_push_back(array, item_data);
obs_data_release(item_data);
}
static void scene_save(void *data, obs_data_t *settings)
{
struct obs_scene *scene = data;
obs_data_array_t *array = obs_data_array_create();
struct obs_scene_item *item;
full_lock(scene);
item = scene->first_item;
while (item) {
scene_save_item(array, item);
item = item->next;
}
obs_data_set_int(settings, "id_counter", scene->id_counter);
full_unlock(scene);
obs_data_set_array(settings, "items", array);
obs_data_array_release(array);
}
static uint32_t scene_getwidth(void *data)
{
UNUSED_PARAMETER(data);
return obs->video.base_width;
}
static uint32_t scene_getheight(void *data)
{
UNUSED_PARAMETER(data);
return obs->video.base_height;
}
static void apply_scene_item_audio_actions(struct obs_scene_item *item,
float **p_buf, uint64_t ts, size_t sample_rate)
{
bool cur_visible = item->visible;
uint64_t frame_num = 0;
size_t deref_count = 0;
float *buf = NULL;
if (p_buf) {
if (!*p_buf)
*p_buf = malloc(AUDIO_OUTPUT_FRAMES * sizeof(float));
buf = *p_buf;
}
pthread_mutex_lock(&item->actions_mutex);
for (size_t i = 0; i < item->audio_actions.num; i++) {
struct item_action action = item->audio_actions.array[i];
uint64_t timestamp = action.timestamp;
uint64_t new_frame_num;
if (timestamp < ts)
timestamp = ts;
new_frame_num = (timestamp - ts) * (uint64_t)sample_rate /
1000000000ULL;
if (ts && new_frame_num >= AUDIO_OUTPUT_FRAMES)
break;
da_erase(item->audio_actions, i--);
item->visible = action.visible;
if (!item->visible)
deref_count++;
if (buf && new_frame_num > frame_num) {
for (; frame_num < new_frame_num; frame_num++)
buf[frame_num] = cur_visible ? 1.0f : 0.0f;
}
cur_visible = item->visible;
}
if (buf) {
for (; frame_num < AUDIO_OUTPUT_FRAMES; frame_num++)
buf[frame_num] = cur_visible ? 1.0f : 0.0f;
}
pthread_mutex_unlock(&item->actions_mutex);
while (deref_count--) {
if (os_atomic_dec_long(&item->active_refs) == 0) {
obs_source_remove_active_child(item->parent->source,
item->source);
}
}
}
static bool apply_scene_item_volume(struct obs_scene_item *item,
float **buf, uint64_t ts, size_t sample_rate)
{
bool actions_pending;
struct item_action action;
pthread_mutex_lock(&item->actions_mutex);
actions_pending = item->audio_actions.num > 0;
if (actions_pending)
action = item->audio_actions.array[0];
pthread_mutex_unlock(&item->actions_mutex);
if (actions_pending) {
uint64_t duration = (uint64_t)AUDIO_OUTPUT_FRAMES *
1000000000ULL / (uint64_t)sample_rate;
if (!ts || action.timestamp < (ts + duration)) {
apply_scene_item_audio_actions(item, buf, ts,
sample_rate);
return true;
}
}
return false;
}
static void process_all_audio_actions(struct obs_scene_item *item,
size_t sample_rate)
{
while (apply_scene_item_volume(item, NULL, 0, sample_rate));
}
static void mix_audio_with_buf(float *p_out, float *p_in, float *buf_in,
size_t pos, size_t count)
{
register float *out = p_out;
register float *buf = buf_in + pos;
register float *in = p_in + pos;
register float *end = in + count;
while (in < end)
*(out++) += *(in++) * *(buf++);
}
static inline void mix_audio(float *p_out, float *p_in,
size_t pos, size_t count)
{
register float *out = p_out;
register float *in = p_in + pos;
register float *end = in + count;
while (in < end)
*(out++) += *(in++);
}
static bool scene_audio_render(void *data, uint64_t *ts_out,
struct obs_source_audio_mix *audio_output, uint32_t mixers,
size_t channels, size_t sample_rate)
{
uint64_t timestamp = 0;
float *buf = NULL;
struct obs_source_audio_mix child_audio;
struct obs_scene *scene = data;
struct obs_scene_item *item;
audio_lock(scene);
item = scene->first_item;
while (item) {
if (!obs_source_audio_pending(item->source)) {
uint64_t source_ts =
obs_source_get_audio_timestamp(item->source);
if (source_ts && (!timestamp || source_ts < timestamp))
timestamp = source_ts;
}
item = item->next;
}
if (!timestamp) {
/* just process all pending audio actions if no audio playing,
* otherwise audio actions will just never be processed */
item = scene->first_item;
while (item) {
process_all_audio_actions(item, sample_rate);
item = item->next;
}
audio_unlock(scene);
return false;
}
item = scene->first_item;
while (item) {
uint64_t source_ts;
size_t pos, count;
bool apply_buf;
apply_buf = apply_scene_item_volume(item, &buf, timestamp,
sample_rate);
if (obs_source_audio_pending(item->source)) {
item = item->next;
continue;
}
source_ts = obs_source_get_audio_timestamp(item->source);
if (!source_ts) {
item = item->next;
continue;
}
pos = (size_t)ns_to_audio_frames(sample_rate,
source_ts - timestamp);
count = AUDIO_OUTPUT_FRAMES - pos;
if (!apply_buf && !item->visible) {
item = item->next;
continue;
}
obs_source_get_audio_mix(item->source, &child_audio);
for (size_t mix = 0; mix < MAX_AUDIO_MIXES; mix++) {
if ((mixers & (1 << mix)) == 0)
continue;
for (size_t ch = 0; ch < channels; ch++) {
float *out = audio_output->output[mix].data[ch];
float *in = child_audio.output[mix].data[ch];
if (apply_buf)
mix_audio_with_buf(out, in, buf, pos,
count);
else
mix_audio(out, in, pos, count);
}
}
item = item->next;
}
*ts_out = timestamp;
audio_unlock(scene);
free(buf);
return true;
}
const struct obs_source_info scene_info =
{
.id = "scene",
.type = OBS_SOURCE_TYPE_SCENE,
.output_flags = OBS_SOURCE_VIDEO |
OBS_SOURCE_CUSTOM_DRAW |
OBS_SOURCE_COMPOSITE,
.get_name = scene_getname,
.create = scene_create,
.destroy = scene_destroy,
.video_tick = scene_video_tick,
.video_render = scene_video_render,
.audio_render = scene_audio_render,
.get_width = scene_getwidth,
.get_height = scene_getheight,
.load = scene_load,
.save = scene_save,
.enum_active_sources = scene_enum_active_sources,
.enum_all_sources = scene_enum_all_sources
};
obs_scene_t *obs_scene_create(const char *name)
{
struct obs_source *source = obs_source_create("scene", name, NULL,
NULL);
return source->context.data;
}
obs_scene_t *obs_scene_create_private(const char *name)
{
struct obs_source *source = obs_source_create_private("scene", name,
NULL);
return source->context.data;
}
static obs_source_t *get_child_at_idx(obs_scene_t *scene, size_t idx)
{
struct obs_scene_item *item = scene->first_item;
while (item && idx--)
item = item->next;
return item ? item->source : NULL;
}
static inline obs_source_t *dup_child(struct darray *array, size_t idx,
obs_scene_t *new_scene, bool private)
{
DARRAY(struct obs_scene_item*) old_items;
obs_source_t *source;
old_items.da = *array;
source = old_items.array[idx]->source;
/* if the old item is referenced more than once in the old scene,
* make sure they're referenced similarly in the new scene to reduce
* load times */
for (size_t i = 0; i < idx; i++) {
struct obs_scene_item *item = old_items.array[i];
if (item->source == source) {
source = get_child_at_idx(new_scene, i);
obs_source_addref(source);
return source;
}
}
return obs_source_duplicate(source, NULL, private);
}
static inline obs_source_t *new_ref(obs_source_t *source)
{
obs_source_addref(source);
return source;
}
obs_scene_t *obs_scene_duplicate(obs_scene_t *scene, const char *name,
enum obs_scene_duplicate_type type)
{
bool make_unique = ((int)type & (1<<0)) != 0;
bool make_private = ((int)type & (1<<1)) != 0;
DARRAY(struct obs_scene_item*) items;
struct obs_scene *new_scene;
struct obs_scene_item *item;
struct obs_source *source;
da_init(items);
if (!obs_ptr_valid(scene, "obs_scene_duplicate"))
return NULL;
/* --------------------------------- */
full_lock(scene);
item = scene->first_item;
while (item) {
da_push_back(items, &item);
obs_sceneitem_addref(item);
item = item->next;
}
full_unlock(scene);
/* --------------------------------- */
new_scene = make_private ?
obs_scene_create_private(name) : obs_scene_create(name);
for (size_t i = 0; i < items.num; i++) {
item = items.array[i];
source = make_unique ?
dup_child(&items.da, i, new_scene, make_private) :
new_ref(item->source);
if (source) {
struct obs_scene_item *new_item =
obs_scene_add(new_scene, source);
if (!new_item) {
obs_source_release(source);
continue;
}
if (!item->user_visible)
set_visibility(new_item, false);
new_item->selected = item->selected;
new_item->pos = item->pos;
new_item->rot = item->rot;
new_item->scale = item->scale;
new_item->align = item->align;
new_item->last_width = item->last_width;
new_item->last_height = item->last_height;
new_item->output_scale = item->output_scale;
new_item->scale_filter = item->scale_filter;
new_item->box_transform = item->box_transform;
new_item->draw_transform = item->draw_transform;
new_item->bounds_type = item->bounds_type;
new_item->bounds_align = item->bounds_align;
new_item->bounds = item->bounds;
obs_sceneitem_set_crop(new_item, &item->crop);
obs_source_release(source);
}
}
for (size_t i = 0; i < items.num; i++)
obs_sceneitem_release(items.array[i]);
da_free(items);
return new_scene;
}
void obs_scene_addref(obs_scene_t *scene)
{
if (scene)
obs_source_addref(scene->source);
}
void obs_scene_release(obs_scene_t *scene)
{
if (scene)
obs_source_release(scene->source);
}
obs_source_t *obs_scene_get_source(const obs_scene_t *scene)
{
return scene ? scene->source : NULL;
}
obs_scene_t *obs_scene_from_source(const obs_source_t *source)
{
if (!source || source->info.id != scene_info.id)
return NULL;
return source->context.data;
}
obs_sceneitem_t *obs_scene_find_source(obs_scene_t *scene, const char *name)
{
struct obs_scene_item *item;
if (!scene)
return NULL;
full_lock(scene);
item = scene->first_item;
while (item) {
if (strcmp(item->source->context.name, name) == 0)
break;
item = item->next;
}
full_unlock(scene);
return item;
}
obs_sceneitem_t *obs_scene_find_sceneitem_by_id(obs_scene_t *scene, int64_t id)
{
struct obs_scene_item *item;
if (!scene)
return NULL;
full_lock(scene);
item = scene->first_item;
while (item) {
if (item->id == id)
break;
item = item->next;
}
full_unlock(scene);
return item;
}
void obs_scene_enum_items(obs_scene_t *scene,
bool (*callback)(obs_scene_t*, obs_sceneitem_t*, void*),
void *param)
{
struct obs_scene_item *item;
if (!scene || !callback)
return;
full_lock(scene);
item = scene->first_item;
while (item) {
struct obs_scene_item *next = item->next;
obs_sceneitem_addref(item);
if (!callback(scene, item, param)) {
obs_sceneitem_release(item);
break;
}
obs_sceneitem_release(item);
item = next;
}
full_unlock(scene);
}
static obs_sceneitem_t *sceneitem_get_ref(obs_sceneitem_t *si)
{
long owners = si->ref;
while (owners > 0) {
if (os_atomic_compare_swap_long(&si->ref, owners, owners + 1))
return si;
owners = si->ref;
}
return NULL;
}
static bool hotkey_show_sceneitem(void *data, obs_hotkey_pair_id id,
obs_hotkey_t *hotkey, bool pressed)
{
UNUSED_PARAMETER(id);
UNUSED_PARAMETER(hotkey);
obs_sceneitem_t *si = sceneitem_get_ref(data);
if (pressed && si && !si->user_visible) {
obs_sceneitem_set_visible(si, true);
obs_sceneitem_release(si);
return true;
}
obs_sceneitem_release(si);
return false;
}
static bool hotkey_hide_sceneitem(void *data, obs_hotkey_pair_id id,
obs_hotkey_t *hotkey, bool pressed)
{
UNUSED_PARAMETER(id);
UNUSED_PARAMETER(hotkey);
obs_sceneitem_t *si = sceneitem_get_ref(data);
if (pressed && si && si->user_visible) {
obs_sceneitem_set_visible(si, false);
obs_sceneitem_release(si);
return true;
}
obs_sceneitem_release(si);
return false;
}
static void init_hotkeys(obs_scene_t *scene, obs_sceneitem_t *item,
const char *name)
{
struct dstr show = {0};
struct dstr hide = {0};
struct dstr show_desc = {0};
struct dstr hide_desc = {0};
dstr_copy(&show, "libobs.show_scene_item.%1");
dstr_replace(&show, "%1", name);
dstr_copy(&hide, "libobs.hide_scene_item.%1");
dstr_replace(&hide, "%1", name);
dstr_copy(&show_desc, obs->hotkeys.sceneitem_show);
dstr_replace(&show_desc, "%1", name);
dstr_copy(&hide_desc, obs->hotkeys.sceneitem_hide);
dstr_replace(&hide_desc, "%1", name);
item->toggle_visibility = obs_hotkey_pair_register_source(scene->source,
show.array, show_desc.array,
hide.array, hide_desc.array,
hotkey_show_sceneitem, hotkey_hide_sceneitem,
item, item);
dstr_free(&show);
dstr_free(&hide);
dstr_free(&show_desc);
dstr_free(&hide_desc);
}
static inline bool source_has_audio(obs_source_t *source)
{
return (source->info.output_flags &
(OBS_SOURCE_AUDIO | OBS_SOURCE_COMPOSITE)) != 0;
}
obs_sceneitem_t *obs_scene_add(obs_scene_t *scene, obs_source_t *source)
{
struct obs_scene_item *last;
struct obs_scene_item *item;
struct calldata params;
uint8_t stack[128];
pthread_mutex_t mutex;
struct item_action action = {
.visible = true,
.timestamp = os_gettime_ns()
};
if (!scene)
return NULL;
if (!source) {
blog(LOG_ERROR, "Tried to add a NULL source to a scene");
return NULL;
}
if (pthread_mutex_init(&mutex, NULL) != 0) {
blog(LOG_WARNING, "Failed to create scene item mutex");
return NULL;
}
if (!obs_source_add_active_child(scene->source, source)) {
blog(LOG_WARNING, "Failed to add source to scene due to "
"infinite source recursion");
pthread_mutex_destroy(&mutex);
return NULL;
}
item = bzalloc(sizeof(struct obs_scene_item));
item->source = source;
item->id = ++scene->id_counter;
item->parent = scene;
item->ref = 1;
item->align = OBS_ALIGN_TOP | OBS_ALIGN_LEFT;
item->actions_mutex = mutex;
item->user_visible = true;
item->locked = false;
os_atomic_set_long(&item->active_refs, 1);
vec2_set(&item->scale, 1.0f, 1.0f);
matrix4_identity(&item->draw_transform);
matrix4_identity(&item->box_transform);
obs_source_addref(source);
if (source_has_audio(source)) {
item->visible = false;
da_push_back(item->audio_actions, &action);
} else {
item->visible = true;
}
if (item_texture_enabled(item)) {
obs_enter_graphics();
item->item_render = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
obs_leave_graphics();
}
full_lock(scene);
last = scene->first_item;
if (!last) {
scene->first_item = item;
} else {
while (last->next)
last = last->next;
last->next = item;
item->prev = last;
}
full_unlock(scene);
if (!scene->source->context.private)
init_hotkeys(scene, item, obs_source_get_name(source));
calldata_init_fixed(&params, stack, sizeof(stack));
calldata_set_ptr(&params, "scene", scene);
calldata_set_ptr(&params, "item", item);
signal_handler_signal(scene->source->context.signals, "item_add",
&params);
return item;
}
static void obs_sceneitem_destroy(obs_sceneitem_t *item)
{
if (item) {
if (item->item_render) {
obs_enter_graphics();
gs_texrender_destroy(item->item_render);
obs_leave_graphics();
}
obs_hotkey_pair_unregister(item->toggle_visibility);
pthread_mutex_destroy(&item->actions_mutex);
if (item->source)
obs_source_release(item->source);
da_free(item->audio_actions);
bfree(item);
}
}
void obs_sceneitem_addref(obs_sceneitem_t *item)
{
if (item)
os_atomic_inc_long(&item->ref);
}
void obs_sceneitem_release(obs_sceneitem_t *item)
{
if (!item)
return;
if (os_atomic_dec_long(&item->ref) == 0)
obs_sceneitem_destroy(item);
}
void obs_sceneitem_remove(obs_sceneitem_t *item)
{
obs_scene_t *scene;
if (!item)
return;
scene = item->parent;
full_lock(scene);
if (item->removed) {
if (scene)
full_unlock(scene);
return;
}
item->removed = true;
assert(scene != NULL);
assert(scene->source != NULL);
set_visibility(item, false);
signal_item_remove(item);
detach_sceneitem(item);
full_unlock(scene);
obs_sceneitem_release(item);
}
obs_scene_t *obs_sceneitem_get_scene(const obs_sceneitem_t *item)
{
return item ? item->parent : NULL;
}
obs_source_t *obs_sceneitem_get_source(const obs_sceneitem_t *item)
{
return item ? item->source : NULL;
}
void obs_sceneitem_select(obs_sceneitem_t *item, bool select)
{
struct calldata params;
uint8_t stack[128];
const char *command = select ? "item_select" : "item_deselect";
if (!item || item->selected == select || !item->parent)
return;
item->selected = select;
calldata_init_fixed(&params, stack, sizeof(stack));
calldata_set_ptr(&params, "scene", item->parent);
calldata_set_ptr(&params, "item", item);
signal_handler_signal(item->parent->source->context.signals,
command, &params);
}
bool obs_sceneitem_selected(const obs_sceneitem_t *item)
{
return item ? item->selected : false;
}
void obs_sceneitem_set_pos(obs_sceneitem_t *item, const struct vec2 *pos)
{
if (item) {
vec2_copy(&item->pos, pos);
update_item_transform(item);
}
}
void obs_sceneitem_set_rot(obs_sceneitem_t *item, float rot)
{
if (item) {
item->rot = rot;
update_item_transform(item);
}
}
void obs_sceneitem_set_scale(obs_sceneitem_t *item, const struct vec2 *scale)
{
if (item) {
vec2_copy(&item->scale, scale);
update_item_transform(item);
}
}
void obs_sceneitem_set_alignment(obs_sceneitem_t *item, uint32_t alignment)
{
if (item) {
item->align = alignment;
update_item_transform(item);
}
}
static inline void signal_reorder(struct obs_scene_item *item)
{
const char *command = NULL;
struct calldata params;
uint8_t stack[128];
command = "reorder";
calldata_init_fixed(&params, stack, sizeof(stack));
calldata_set_ptr(&params, "scene", item->parent);
signal_handler_signal(item->parent->source->context.signals,
command, &params);
}
void obs_sceneitem_set_order(obs_sceneitem_t *item,
enum obs_order_movement movement)
{
if (!item) return;
struct obs_scene_item *next, *prev;
struct obs_scene *scene = item->parent;
obs_scene_addref(scene);
full_lock(scene);
next = item->next;
prev = item->prev;
detach_sceneitem(item);
if (movement == OBS_ORDER_MOVE_DOWN) {
attach_sceneitem(scene, item, prev ? prev->prev : NULL);
} else if (movement == OBS_ORDER_MOVE_UP) {
attach_sceneitem(scene, item, next ? next : prev);
} else if (movement == OBS_ORDER_MOVE_TOP) {
struct obs_scene_item *last = next;
if (!last) {
last = prev;
} else {
while (last->next)
last = last->next;
}
attach_sceneitem(scene, item, last);
} else if (movement == OBS_ORDER_MOVE_BOTTOM) {
attach_sceneitem(scene, item, NULL);
}
signal_reorder(item);
full_unlock(scene);
obs_scene_release(scene);
}
void obs_sceneitem_set_order_position(obs_sceneitem_t *item,
int position)
{
if (!item) return;
struct obs_scene *scene = item->parent;
struct obs_scene_item *next;
obs_scene_addref(scene);
full_lock(scene);
detach_sceneitem(item);
next = scene->first_item;
if (position == 0) {
attach_sceneitem(scene, item, NULL);
} else {
for (int i = position; i > 1; --i) {
if (next->next == NULL)
break;
next = next->next;
}
attach_sceneitem(scene, item, next);
}
signal_reorder(item);
full_unlock(scene);
obs_scene_release(scene);
}
void obs_sceneitem_set_bounds_type(obs_sceneitem_t *item,
enum obs_bounds_type type)
{
if (item) {
item->bounds_type = type;
update_item_transform(item);
}
}
void obs_sceneitem_set_bounds_alignment(obs_sceneitem_t *item,
uint32_t alignment)
{
if (item) {
item->bounds_align = alignment;
update_item_transform(item);
}
}
void obs_sceneitem_set_bounds(obs_sceneitem_t *item, const struct vec2 *bounds)
{
if (item) {
item->bounds = *bounds;
update_item_transform(item);
}
}
void obs_sceneitem_get_pos(const obs_sceneitem_t *item, struct vec2 *pos)
{
if (item)
vec2_copy(pos, &item->pos);
}
float obs_sceneitem_get_rot(const obs_sceneitem_t *item)
{
return item ? item->rot : 0.0f;
}
void obs_sceneitem_get_scale(const obs_sceneitem_t *item, struct vec2 *scale)
{
if (item)
vec2_copy(scale, &item->scale);
}
uint32_t obs_sceneitem_get_alignment(const obs_sceneitem_t *item)
{
return item ? item->align : 0;
}
enum obs_bounds_type obs_sceneitem_get_bounds_type(const obs_sceneitem_t *item)
{
return item ? item->bounds_type : OBS_BOUNDS_NONE;
}
uint32_t obs_sceneitem_get_bounds_alignment(const obs_sceneitem_t *item)
{
return item ? item->bounds_align : 0;
}
void obs_sceneitem_get_bounds(const obs_sceneitem_t *item, struct vec2 *bounds)
{
if (item)
*bounds = item->bounds;
}
void obs_sceneitem_get_info(const obs_sceneitem_t *item,
struct obs_transform_info *info)
{
if (item && info) {
info->pos = item->pos;
info->rot = item->rot;
info->scale = item->scale;
info->alignment = item->align;
info->bounds_type = item->bounds_type;
info->bounds_alignment = item->bounds_align;
info->bounds = item->bounds;
}
}
void obs_sceneitem_set_info(obs_sceneitem_t *item,
const struct obs_transform_info *info)
{
if (item && info) {
item->pos = info->pos;
item->rot = info->rot;
item->scale = info->scale;
item->align = info->alignment;
item->bounds_type = info->bounds_type;
item->bounds_align = info->bounds_alignment;
item->bounds = info->bounds;
update_item_transform(item);
}
}
void obs_sceneitem_get_draw_transform(const obs_sceneitem_t *item,
struct matrix4 *transform)
{
if (item)
matrix4_copy(transform, &item->draw_transform);
}
void obs_sceneitem_get_box_transform(const obs_sceneitem_t *item,
struct matrix4 *transform)
{
if (item)
matrix4_copy(transform, &item->box_transform);
}
bool obs_sceneitem_visible(const obs_sceneitem_t *item)
{
return item ? item->user_visible : false;
}
bool obs_sceneitem_set_visible(obs_sceneitem_t *item, bool visible)
{
struct calldata cd;
uint8_t stack[256];
struct item_action action = {
.visible = visible,
.timestamp = os_gettime_ns()
};
if (!item)
return false;
if (item->user_visible == visible)
return false;
if (!item->parent)
return false;
if (visible) {
if (os_atomic_inc_long(&item->active_refs) == 1) {
if (!obs_source_add_active_child(item->parent->source,
item->source)) {
os_atomic_dec_long(&item->active_refs);
return false;
}
}
}
item->user_visible = visible;
calldata_init_fixed(&cd, stack, sizeof(stack));
calldata_set_ptr(&cd, "scene", item->parent);
calldata_set_ptr(&cd, "item", item);
calldata_set_bool(&cd, "visible", visible);
signal_handler_signal(item->parent->source->context.signals,
"item_visible", &cd);
if (source_has_audio(item->source)) {
pthread_mutex_lock(&item->actions_mutex);
da_push_back(item->audio_actions, &action);
pthread_mutex_unlock(&item->actions_mutex);
} else {
set_visibility(item, visible);
}
return true;
}
bool obs_sceneitem_locked(const obs_sceneitem_t *item)
{
return item ? item->locked : false;
}
bool obs_sceneitem_set_locked(obs_sceneitem_t *item, bool lock)
{
if (!item)
return false;
if (item->locked == lock)
return false;
if (!item->parent)
return false;
item->locked = lock;
return true;
}
static bool sceneitems_match(obs_scene_t *scene, obs_sceneitem_t * const *items,
size_t size, bool *order_matches)
{
obs_sceneitem_t *item = scene->first_item;
size_t count = 0;
while (item) {
bool found = false;
for (size_t i = 0; i < size; i++) {
if (items[i] != item)
continue;
if (count != i)
*order_matches = false;
found = true;
break;
}
if (!found)
return false;
item = item->next;
count += 1;
}
return count == size;
}
bool obs_scene_reorder_items(obs_scene_t *scene,
obs_sceneitem_t * const *item_order, size_t item_order_size)
{
if (!scene || !item_order_size)
return false;
obs_scene_addref(scene);
full_lock(scene);
bool order_matches = true;
if (!sceneitems_match(scene, item_order, item_order_size,
&order_matches) || order_matches) {
full_unlock(scene);
obs_scene_release(scene);
return false;
}
scene->first_item = item_order[0];
obs_sceneitem_t *prev = NULL;
for (size_t i = 0; i < item_order_size; i++) {
item_order[i]->prev = prev;
item_order[i]->next = NULL;
if (prev)
prev->next = item_order[i];
prev = item_order[i];
}
signal_reorder(scene->first_item);
full_unlock(scene);
obs_scene_release(scene);
return true;
}
void obs_scene_atomic_update(obs_scene_t *scene,
obs_scene_atomic_update_func func, void *data)
{
if (!scene)
return;
obs_scene_addref(scene);
full_lock(scene);
func(data, scene);
full_unlock(scene);
obs_scene_release(scene);
}
static inline bool crop_equal(const struct obs_sceneitem_crop *crop1,
const struct obs_sceneitem_crop *crop2)
{
return crop1->left == crop2->left &&
crop1->right == crop2->right &&
crop1->top == crop2->top &&
crop1->bottom == crop2->bottom;
}
void obs_sceneitem_set_crop(obs_sceneitem_t *item,
const struct obs_sceneitem_crop *crop)
{
bool item_tex_now_enabled;
if (!obs_ptr_valid(item, "obs_sceneitem_set_crop"))
return;
if (!obs_ptr_valid(crop, "obs_sceneitem_set_crop"))
return;
if (crop_equal(crop, &item->crop))
return;
item_tex_now_enabled = crop_enabled(crop) ||
scale_filter_enabled(item) || item_is_scene(item);
obs_enter_graphics();
if (!item_tex_now_enabled) {
gs_texrender_destroy(item->item_render);
item->item_render = NULL;
} else if (!item->item_render) {
item->item_render = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
}
memcpy(&item->crop, crop, sizeof(*crop));
if (item->crop.left < 0) item->crop.left = 0;
if (item->crop.right < 0) item->crop.right = 0;
if (item->crop.top < 0) item->crop.top = 0;
if (item->crop.bottom < 0) item->crop.bottom = 0;
obs_leave_graphics();
update_item_transform(item);
}
void obs_sceneitem_get_crop(const obs_sceneitem_t *item,
struct obs_sceneitem_crop *crop)
{
if (!obs_ptr_valid(item, "obs_sceneitem_get_crop"))
return;
if (!obs_ptr_valid(crop, "obs_sceneitem_get_crop"))
return;
memcpy(crop, &item->crop, sizeof(*crop));
}
void obs_sceneitem_set_scale_filter(obs_sceneitem_t *item,
enum obs_scale_type filter)
{
if (!obs_ptr_valid(item, "obs_sceneitem_set_scale_filter"))
return;
item->scale_filter = filter;
obs_enter_graphics();
if (!item_texture_enabled(item)) {
gs_texrender_destroy(item->item_render);
item->item_render = NULL;
} else if (!item->item_render) {
item->item_render = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
}
obs_leave_graphics();
update_item_transform(item);
}
enum obs_scale_type obs_sceneitem_get_scale_filter(
obs_sceneitem_t *item)
{
return obs_ptr_valid(item, "obs_sceneitem_get_scale_filter") ?
item->scale_filter : OBS_SCALE_DISABLE;
}
void obs_sceneitem_defer_update_begin(obs_sceneitem_t *item)
{
if (!obs_ptr_valid(item, "obs_sceneitem_defer_update_begin"))
return;
os_atomic_inc_long(&item->defer_update);
}
void obs_sceneitem_defer_update_end(obs_sceneitem_t *item)
{
if (!obs_ptr_valid(item, "obs_sceneitem_defer_update_end"))
return;
if (os_atomic_dec_long(&item->defer_update) == 0)
update_item_transform(item);
}
int64_t obs_sceneitem_get_id(const obs_sceneitem_t *item)
{
if (!obs_ptr_valid(item, "obs_sceneitem_get_id"))
return 0;
return item->id;
}
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