avutil/ambient_viewing_environment: set a sane default value for AVRational fields

Prevent potential divisions by 0 when using them immediately after allocation.

Signed-off-by: James Almer <jamrial@gmail.com>

libavutil/ambient_viewing_environment.c

@@ -21,6 +21,13 @@
 #include "ambient_viewing_environment.h"
 #include "mem.h"
 
+static void get_defaults(AVAmbientViewingEnvironment *env)
+{
+    env->ambient_illuminance =
+    env->ambient_light_x     =
+    env->ambient_light_y     = (AVRational) { 0, 1 };
+}
+
 AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size)
 {
     AVAmbientViewingEnvironment *env =
@@ -28,6 +35,8 @@ AVAmbientViewingEnvironment *av_ambient_viewing_environment_alloc(size_t *size)
     if (!env)
         return NULL;
 
+    get_defaults(env);
+
      if (size)
         *size = sizeof(*env);
 
@@ -44,6 +53,7 @@ AVAmbientViewingEnvironment *av_ambient_viewing_environment_create_side_data(AVF
         return NULL;
 
     memset(side_data->data, 0, side_data->size);
+    get_defaults((AVAmbientViewingEnvironment *)side_data->data);
 
     return (AVAmbientViewingEnvironment *)side_data->data;
 }

libavutil/version.h

@@ -80,7 +80,7 @@
 
 #define LIBAVUTIL_VERSION_MAJOR  59
 #define LIBAVUTIL_VERSION_MINOR  24
-#define LIBAVUTIL_VERSION_MICRO 100
+#define LIBAVUTIL_VERSION_MICRO 101
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \