lavu/opencl: add opencl public error API

Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/opencl.h

@@ -154,6 +154,14 @@ AVOpenCLExternalEnv *av_opencl_alloc_external_env(void);
  */
 void av_opencl_free_external_env(AVOpenCLExternalEnv **ext_opencl_env);
 
+/**
+ * Get OpenCL error string.
+ *
+ * @param status    OpenCL error code
+ * @return OpenCL error string
+ */
+const char *av_opencl_errstr(cl_int status);
+
 /**
  * Register kernel code.
  *

libavutil/version.h

@@ -75,7 +75,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  52
-#define LIBAVUTIL_VERSION_MINOR  28
+#define LIBAVUTIL_VERSION_MINOR  29
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \