obs-transitions: Implement cut transition

plugins/obs-transitions/CMakeLists.txt

@@ -3,6 +3,7 @@ project(obs-transitions)
 set(obs-transitions_SOURCES
 	obs-transitions.c
 	transition-fade.c
+	transition-cut.c
 	)
 
 add_library(obs-transitions MODULE

plugins/obs-transitions/data/locale/en-US.ini

@@ -1 +1,2 @@
 FadeTransition="Fade"
+CutTransition="Cut"

plugins/obs-transitions/obs-transitions.c

@@ -4,10 +4,12 @@ OBS_DECLARE_MODULE()
 
 OBS_MODULE_USE_DEFAULT_LOCALE("obs-transitions", "en-US")
 
+extern struct obs_source_info cut_transition;
 extern struct obs_source_info fade_transition;
 
 bool obs_module_load(void)
 {
+	obs_register_source(&cut_transition);
 	obs_register_source(&fade_transition);
 	return true;
 }

plugins/obs-transitions/transition-cut.c

@@ -0,0 +1,67 @@
+#include <obs-module.h>
+
+struct cut_info {
+	obs_source_t *source;
+};
+
+static const char *cut_get_name(void *type_data)
+{
+	UNUSED_PARAMETER(type_data);
+	return obs_module_text("CutTransition");
+}
+
+void *cut_create(obs_data_t *settings, obs_source_t *source)
+{
+	struct cut_info *cut;
+
+	cut = bmalloc(sizeof(*cut));
+	cut->source = source;
+
+	obs_transition_enable_fixed(source, true, 0);
+	UNUSED_PARAMETER(settings);
+	return cut;
+}
+
+void cut_destroy(void *data)
+{
+	struct cut_info *cut = data;
+	bfree(cut);
+}
+
+void cut_video_render(void *data, gs_effect_t *effect)
+{
+	struct cut_info *cut = data;
+	obs_transition_video_render(cut->source, NULL);
+	UNUSED_PARAMETER(effect);
+}
+
+static float mix_a(void *data, float t)
+{
+	UNUSED_PARAMETER(data);
+	return 1.0f - t;
+}
+
+static float mix_b(void *data, float t)
+{
+	UNUSED_PARAMETER(data);
+	return t;
+}
+
+bool cut_audio_render(void *data, uint64_t *ts_out,
+		struct obs_source_audio_mix *audio, uint32_t mixers,
+		size_t channels, size_t sample_rate)
+{
+	struct cut_info *cut = data;
+	return obs_transition_audio_render(cut->source, ts_out,
+		audio, mixers, channels, sample_rate, mix_a, mix_b);
+}
+
+struct obs_source_info cut_transition = {
+	.id = "cut_transition",
+	.type = OBS_SOURCE_TYPE_TRANSITION,
+	.get_name = cut_get_name,
+	.create = cut_create,
+	.destroy = cut_destroy,
+	.video_render = cut_video_render,
+	.audio_render = cut_audio_render,
+};