vo_opengl: require --enable-gpl3 for nnedi

There are claims that nnedi3.c doesn't constitute its own new
implementation, but is derived from existing HLSL or OpenCL shaders
distributed under the LGPLv3 license.

Until these are resolved, do the "correct" thing and require
--enable-gpl3 to build nnedi.

1 files changed, 23 insertions, 0 deletions

diff --git a/video/out/opengl/nnedi3.c b/video/out/opengl/nnedi3.c
index 681aad5813..bb200b0f7a 100644
--- a/video/out/opengl/nnedi3.c
+++ b/video/out/opengl/nnedi3.c
@@ -18,10 +18,15 @@
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The shader portions may have been derived from existing LGPLv3 shaders
+ * (see below), possibly making this file effectively LGPLv3.
  */
 
 #include "nnedi3.h"
 
+#if HAVE_NNEDI
+
 #include <assert.h>
 #include <stdint.h>
 #include <float.h>
@@ -233,3 +238,21 @@ void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
               i, tex_num, tex_num, tex_num, i, tex_mul);
     }
 }
+
+#else
+
+const struct m_sub_options nnedi3_conf = {0};
+
+
+const float* get_nnedi3_weights(const struct nnedi3_opts *conf, int *size)
+{
+    return NULL;
+}
+
+void pass_nnedi3(GL *gl, struct gl_shader_cache *sc, int planes, int tex_num,
+                 int step, float tex_mul, const struct nnedi3_opts *conf,
+                 struct gl_transform *transform)
+{
+}
+
+#endif