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obs-transitions: Crop output of stinger media player 

This fixes an issue with Track Matte Stingers applied as visibility
transitions, where the side-by-side or stacked matte file mode would
result in the matte part of the video to "overflow" outside of the
transition's zone
master
Stéphane Lepin 2021-04-18 04:41:30 +02:00 committed by Jim
parent 661256e6de
commit dc2b00a4dd
1 changed files with 38 additions and 19 deletions
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57
plugins/obs-transitions/transition-stinger.c
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@ -40,7 +40,8 @@ struct stinger_info {
gs_eparam_t *ep_matte_tex;
gs_eparam_t *ep_invert_matte;
gs_texrender_t *matte_tex;
gs_texrender_t *matte_texrender;
gs_texrender_t *stinger_texrender;
float (*mix_a)(void *data, float t);
float (*mix_b)(void *data, float t);
@ -169,7 +170,8 @@ static void *stinger_create(obs_data_t *settings, obs_source_t *source)
s->ep_invert_matte =
gs_effect_get_param_by_name(s->matte_effect, "invert_matte");
s->matte_tex = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
s->matte_texrender = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
s->stinger_texrender = gs_texrender_create(GS_RGBA, GS_ZS_NONE);
obs_transition_enable_fixed(s->source, true, 0);
obs_source_update(source, settings);
@ -182,7 +184,8 @@ static void stinger_destroy(void *data)
obs_source_release(s->media_source);
obs_source_release(s->matte_source);
gs_texrender_destroy(s->matte_tex);
gs_texrender_destroy(s->stinger_texrender);
gs_texrender_destroy(s->matte_texrender);
gs_effect_destroy(s->matte_effect);
@ -219,9 +222,9 @@ static void stinger_matte_render(void *data, gs_texture_t *a, gs_texture_t *b,
(s->matte_layout == MATTE_LAYOUT_VERTICAL ? (-matte_cy) : 0.0f);
// Track matte media render
gs_texrender_reset(s->matte_tex);
gs_texrender_reset(s->matte_texrender);
if (matte_cx > 0 && matte_cy > 0) {
if (gs_texrender_begin(s->matte_tex, cx, cy)) {
if (gs_texrender_begin(s->matte_texrender, cx, cy)) {
gs_matrix_push();
gs_matrix_translate3f(width_offset, height_offset,
0.0f);
@ -229,14 +232,14 @@ static void stinger_matte_render(void *data, gs_texture_t *a, gs_texture_t *b,
obs_source_video_render(matte_source);
gs_matrix_pop();
gs_texrender_end(s->matte_tex);
gs_texrender_end(s->matte_texrender);
}
}
gs_effect_set_texture(s->ep_a_tex, a);
gs_effect_set_texture(s->ep_b_tex, b);
gs_effect_set_texture(s->ep_matte_tex,
gs_texrender_get_texture(s->matte_tex));
gs_texrender_get_texture(s->matte_texrender));
gs_effect_set_bool(s->ep_invert_matte, s->invert_matte);
while (gs_effect_loop(s->matte_effect, "StingerMatte"))
@ -265,8 +268,8 @@ static void stinger_video_render(void *data, gs_effect_t *effect)
/* --------------------- */
float source_cx = (float)obs_source_get_width(s->source);
float source_cy = (float)obs_source_get_height(s->source);
float cx = (float)obs_source_get_width(s->source);
float cy = (float)obs_source_get_height(s->source);
uint32_t media_cx = obs_source_get_width(s->media_source);
uint32_t media_cy = obs_source_get_height(s->media_source);
@ -276,20 +279,36 @@ static void stinger_video_render(void *data, gs_effect_t *effect)
float scale_x, scale_y;
if (s->track_matte_enabled) {
scale_x = source_cx / ((float)media_cx / s->matte_width_factor);
scale_y =
source_cy / ((float)media_cy / s->matte_height_factor);
scale_x = cx / ((float)media_cx / s->matte_width_factor);
scale_y = cy / ((float)media_cy / s->matte_height_factor);
} else {
scale_x = source_cx / (float)media_cx;
scale_y = source_cy / (float)media_cy;
scale_x = cx / (float)media_cx;
scale_y = cy / (float)media_cy;
}
gs_matrix_push();
gs_matrix_scale3f(scale_x, scale_y, 1.0f);
obs_source_video_render(s->media_source);
gs_matrix_pop();
// rendering the stinger media in an intermediary texture with the same size
// as the transition itself ensures that stacked and side-by-side files used with
// the Track Matte mode will only show their stinger side, and crop out the matte side
// of the texture
gs_texrender_reset(s->stinger_texrender);
if (gs_texrender_begin(s->stinger_texrender, cx, cy)) {
struct vec4 background;
vec4_zero(&background);
gs_clear(GS_CLEAR_COLOR, &background, 0.0f, 0);
UNUSED_PARAMETER(effect);
obs_source_video_render(s->media_source);
gs_texrender_end(s->stinger_texrender);
}
gs_texture_t *stinger_tex =
gs_texrender_get_texture(s->stinger_texrender);
if (stinger_tex) {
effect = obs_get_base_effect(OBS_EFFECT_DEFAULT);
while (gs_effect_loop(effect, "Draw")) {
obs_source_draw(stinger_tex, 0, 0, 0, 0, false);
}
}
}
static inline float calc_fade(float t, float mul)