obs-studio/plugins/obs-filters/crop-filter.c

225 lines
6.4 KiB
C

#include <obs-module.h>
#include <graphics/vec2.h>
struct crop_filter_data {
obs_source_t *context;
gs_effect_t *effect;
gs_eparam_t *param_mul;
gs_eparam_t *param_add;
int left;
int right;
int top;
int bottom;
uint32_t abs_cx;
uint32_t abs_cy;
uint32_t width;
uint32_t height;
bool absolute;
};
static const char *crop_filter_get_name(void)
{
return obs_module_text("CropFilter");
}
static void *crop_filter_create(obs_data_t *settings, obs_source_t *context)
{
struct crop_filter_data *filter = bzalloc(sizeof(*filter));
char *effect_path = obs_module_file("crop_filter.effect");
filter->context = context;
obs_enter_graphics();
filter->effect = gs_effect_create_from_file(effect_path, NULL);
obs_leave_graphics();
bfree(effect_path);
if (!filter->effect) {
bfree(filter);
return NULL;
}
filter->param_mul = gs_effect_get_param_by_name(filter->effect,
"mul_val");
filter->param_add = gs_effect_get_param_by_name(filter->effect,
"add_val");
obs_source_update(context, settings);
return filter;
}
static void crop_filter_destroy(void *data)
{
struct crop_filter_data *filter = data;
obs_enter_graphics();
gs_effect_destroy(filter->effect);
obs_leave_graphics();
bfree(filter);
}
static void crop_filter_update(void *data, obs_data_t *settings)
{
struct crop_filter_data *filter = data;
filter->absolute = !obs_data_get_bool(settings, "relative");
filter->left = (int)obs_data_get_int(settings, "left");
filter->top = (int)obs_data_get_int(settings, "top");
filter->right = (int)obs_data_get_int(settings, "right");
filter->bottom = (int)obs_data_get_int(settings, "bottom");
filter->abs_cx = (int)obs_data_get_int(settings, "cx");
filter->abs_cy = (int)obs_data_get_int(settings, "cy");
}
static bool relative_clicked(obs_properties_t *props, obs_property_t *p,
obs_data_t *settings)
{
bool relative = obs_data_get_bool(settings, "relative");
obs_property_set_description(obs_properties_get(props, "left"),
relative ? obs_module_text("Crop.Left") : "X");
obs_property_set_description(obs_properties_get(props, "top"),
relative ? obs_module_text("Crop.Top") : "Y");
obs_property_set_visible(obs_properties_get(props, "right"), relative);
obs_property_set_visible(obs_properties_get(props, "bottom"), relative);
obs_property_set_visible(obs_properties_get(props, "cx"), !relative);
obs_property_set_visible(obs_properties_get(props, "cy"), !relative);
UNUSED_PARAMETER(p);
return true;
}
static obs_properties_t *crop_filter_properties(void *data)
{
obs_properties_t *props = obs_properties_create();
obs_property_t *p = obs_properties_add_bool(props, "relative",
obs_module_text("Crop.Relative"));
obs_property_set_modified_callback(p, relative_clicked);
obs_properties_add_int(props, "left", obs_module_text("Crop.Left"),
0, 8192, 1);
obs_properties_add_int(props, "top", obs_module_text("Crop.Top"),
0, 8192, 1);
obs_properties_add_int(props, "right", obs_module_text("Crop.Right"),
0, 8192, 1);
obs_properties_add_int(props, "bottom", obs_module_text("Crop.Bottom"),
0, 8192, 1);
obs_properties_add_int(props, "cx", obs_module_text("Crop.Width"),
0, 8192, 1);
obs_properties_add_int(props, "cy", obs_module_text("Crop.Height"),
0, 8192, 1);
UNUSED_PARAMETER(data);
return props;
}
static void crop_filter_defaults(obs_data_t *settings)
{
obs_data_set_default_bool(settings, "relative", true);
}
static void calc_crop_dimensions(struct crop_filter_data *filter,
struct vec2 *mul_val, struct vec2 *add_val)
{
obs_source_t *target = obs_filter_get_target(filter->context);
uint32_t width;
uint32_t height;
uint32_t total;
if (!target) {
width = 0;
height = 0;
} else {
width = obs_source_get_base_width(target);
height = obs_source_get_base_height(target);
}
if (filter->absolute) {
uint32_t max_abs_cx = (filter->left + filter->abs_cx);
if (max_abs_cx > width) max_abs_cx = width;
max_abs_cx -= filter->left;
total = max_abs_cx < width ? (width - max_abs_cx) : 0;
} else {
total = filter->left + filter->right;
}
filter->width = total > width ? 0 : (width - total);
if (filter->absolute) {
uint32_t max_abs_cy = (filter->top + filter->abs_cy);
if (max_abs_cy > height) max_abs_cy = height;
max_abs_cy -= filter->top;
total = max_abs_cy < height ? (height - max_abs_cy) : 0;
} else {
total = filter->top + filter->bottom;
}
filter->height = total > height ? 0 : (height - total);
if (width && filter->width) {
mul_val->x = (float)filter->width / (float)width;
add_val->x = (float)filter->left / (float)width;
}
if (height && filter->height) {
mul_val->y = (float)filter->height / (float)height;
add_val->y = (float)filter->top / (float)height;
}
}
static void crop_filter_render(void *data, gs_effect_t *effect)
{
struct crop_filter_data *filter = data;
struct vec2 mul_val;
struct vec2 add_val;
vec2_zero(&mul_val);
vec2_zero(&add_val);
calc_crop_dimensions(filter, &mul_val, &add_val);
obs_source_process_filter_begin(filter->context, GS_RGBA,
OBS_NO_DIRECT_RENDERING);
gs_effect_set_vec2(filter->param_mul, &mul_val);
gs_effect_set_vec2(filter->param_add, &add_val);
obs_source_process_filter_end(filter->context, filter->effect,
filter->width, filter->height);
UNUSED_PARAMETER(effect);
}
static uint32_t crop_filter_width(void *data)
{
struct crop_filter_data *crop = data;
return crop->width;
}
static uint32_t crop_filter_height(void *data)
{
struct crop_filter_data *crop = data;
return crop->height;
}
struct obs_source_info crop_filter = {
.id = "crop_filter",
.type = OBS_SOURCE_TYPE_FILTER,
.output_flags = OBS_SOURCE_VIDEO,
.get_name = crop_filter_get_name,
.create = crop_filter_create,
.destroy = crop_filter_destroy,
.update = crop_filter_update,
.get_properties = crop_filter_properties,
.get_defaults = crop_filter_defaults,
.video_render = crop_filter_render,
.get_width = crop_filter_width,
.get_height = crop_filter_height
};