From c36a5ae92b32d7b8401c468c7f20fabeb05d775f Mon Sep 17 00:00:00 2001
From: gxalpha <beckmann.sebastian@outlook.de>
Date: Sun, 7 Nov 2021 12:51:41 +0100
Subject: [PATCH] libobs: Add obs_get_transition_by_name

---
 docs/sphinx/reference-core.rst |  9 +++++++++
 libobs/obs.c                   | 21 +++++++++++++++++++++
 libobs/obs.h                   |  3 +++
 3 files changed, 33 insertions(+)

diff --git a/docs/sphinx/reference-core.rst b/docs/sphinx/reference-core.rst
index 31a61aae6..3d246851e 100644
--- a/docs/sphinx/reference-core.rst
+++ b/docs/sphinx/reference-core.rst
@@ -262,6 +262,15 @@ Libobs Objects
 
 ---------------------
 
+.. function:: obs_source_t *obs_get_transition_by_name(const char *name)
+
+   Gets a transition by its name.
+  
+   Increments the source reference counter, use
+   :c:func:`obs_source_release()` to release it when complete.
+
+---------------------
+
 .. function:: obs_output_t *obs_get_output_by_name(const char *name)
 
    Gets an output by its name.
diff --git a/libobs/obs.c b/libobs/obs.c
index d62e729cf..1c2a714f7 100644
--- a/libobs/obs.c
+++ b/libobs/obs.c
@@ -1593,6 +1593,27 @@ obs_source_t *obs_get_source_by_name(const char *name)
 				   obs_source_addref_safe_);
 }
 
+obs_source_t *obs_get_transition_by_name(const char *name)
+{
+	struct obs_source **first = &obs->data.first_source;
+	struct obs_source *source;
+
+	pthread_mutex_lock(&obs->data.sources_mutex);
+
+	source = *first;
+	while (source) {
+		if (source->info.type == OBS_SOURCE_TYPE_TRANSITION &&
+		    strcmp(source->context.name, name) == 0) {
+			source = obs_source_addref_safe_(source);
+			break;
+		}
+		source = (void *)source->context.next;
+	}
+
+	pthread_mutex_unlock(&obs->data.sources_mutex);
+	return source;
+}
+
 obs_output_t *obs_get_output_by_name(const char *name)
 {
 	return get_context_by_name(&obs->data.first_output, name,
diff --git a/libobs/obs.h b/libobs/obs.h
index 4f015130f..da7e4dd4e 100644
--- a/libobs/obs.h
+++ b/libobs/obs.h
@@ -636,6 +636,9 @@ EXPORT void obs_enum_services(bool (*enum_proc)(void *, obs_service_t *),
  */
 EXPORT obs_source_t *obs_get_source_by_name(const char *name);
 
+/** Get a transition source by its name. */
+EXPORT obs_source_t *obs_get_transition_by_name(const char *name);
+
 /** Gets an output by its name. */
 EXPORT obs_output_t *obs_get_output_by_name(const char *name);