obs-outputs: Enable Windows mbedTLS threading support

plugins/obs-outputs/obs-outputs.c

@@ -5,6 +5,7 @@
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
 #include <winsock2.h>
+#include <mbedtls/threading.h>
 #endif
 
 OBS_DECLARE_MODULE()
@@ -21,6 +22,37 @@ extern struct obs_output_info flv_output_info;
 extern struct obs_output_info ftl_output_info;
 #endif
 
+#if defined(_WIN32) && defined(MBEDTLS_THREADING_ALT)
+void mbed_mutex_init(mbedtls_threading_mutex_t *m)
+{
+	CRITICAL_SECTION *c = bzalloc(sizeof(CRITICAL_SECTION));
+	*m = c;
+	InitializeCriticalSection(c);
+}
+
+void mbed_mutex_free(mbedtls_threading_mutex_t *m)
+{
+	CRITICAL_SECTION *c = *m;
+	DeleteCriticalSection(c);
+	bfree(*m);
+	*m = NULL;
+}
+
+int mbed_mutex_lock(mbedtls_threading_mutex_t *m)
+{
+	CRITICAL_SECTION *c = *m;
+	EnterCriticalSection(c);
+	return 0;
+}
+
+int mbed_mutex_unlock(mbedtls_threading_mutex_t *m)
+{
+	CRITICAL_SECTION *c = *m;
+	LeaveCriticalSection(c);
+	return 0;
+}
+#endif
+
 bool obs_module_load(void)
 {
 #ifdef _WIN32
@@ -28,6 +60,11 @@ bool obs_module_load(void)
 	WSAStartup(MAKEWORD(2, 2), &wsad);
 #endif
 
+#if defined(_WIN32) && defined(MBEDTLS_THREADING_ALT)
+	mbedtls_threading_set_alt(mbed_mutex_init, mbed_mutex_free,
+				  mbed_mutex_lock, mbed_mutex_unlock);
+#endif
+
 	obs_register_output(&rtmp_output_info);
 	obs_register_output(&null_output_info);
 	obs_register_output(&flv_output_info);