lavc/qsvdec: add function ff_qsv_map_picstruct()

Signed-off-by: Zhong Li <zhong.li@intel.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/libavcodec/qsv.c b/libavcodec/qsv.c
index 986d4f6022..437ef7ca75 100644
--- a/libavcodec/qsv.c
+++ b/libavcodec/qsv.c
@@ -245,6 +245,24 @@ int ff_qsv_find_surface_idx(QSVFramesContext *ctx, QSVFrame *frame)
     return AVERROR_BUG;
 }
 
+enum AVFieldOrder ff_qsv_map_picstruct(int mfx_pic_struct)
+{
+    enum AVFieldOrder field = AV_FIELD_UNKNOWN;
+    switch (mfx_pic_struct & 0xF) {
+    case MFX_PICSTRUCT_PROGRESSIVE:
+        field = AV_FIELD_PROGRESSIVE;
+        break;
+    case MFX_PICSTRUCT_FIELD_TFF:
+        field = AV_FIELD_TT;
+        break;
+    case MFX_PICSTRUCT_FIELD_BFF:
+        field = AV_FIELD_BB;
+        break;
+    }
+
+    return field;
+}
+
 enum AVPictureType ff_qsv_map_pictype(int mfx_pic_type)
 {
     enum AVPictureType type;