hwcontext_drm: Clarify value for unknown format modifiers

f86e8c91 · Mark Thompson · 6135c958 · f86e8c91
Commit f86e8c91 authored Mar 21, 2018 by Mark Thompson
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hwcontext_drm.h libavutil/hwcontext_drm.h +3 -0

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--- a/libavutil/hwcontext_drm.h
+++ b/libavutil/hwcontext_drm.h
@@ -58,6 +58,9 @@ typedef struct AVDRMObjectDescriptor {
    size_t size;
    /**
     * Format modifier applied to the object (DRM_FORMAT_MOD_*).
+     *
+     * If the format modifier is unknown then this should be set to
+     * DRM_FORMAT_MOD_INVALID.
     */
    uint64_t format_modifier;
 } AVDRMObjectDescriptor;