lavc/qsvdec: fix keyframes

MFX_FRAMETYPE_IDR is ORed to the frame type for AVC and HEVC keyframes,
and MFX_FRAMETYPE_I is taken as keyframe flag for other codecs when
getting the output surface from the SDK, hence we may mark the output
frame as keyframe accordingly.

Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>

libavcodec/qsvdec.c

@@ -931,12 +931,18 @@ static int qsv_decode(AVCodecContext *avctx, QSVContext *q,
         frame->flags |= AV_FRAME_FLAG_INTERLACED *
             !(outsurf->Info.PicStruct & MFX_PICSTRUCT_PROGRESSIVE);
         frame->pict_type = ff_qsv_map_pictype(aframe.frame->dec_info.FrameType);
-        //Key frame is IDR frame is only suitable for H264. For HEVC, IRAPs are key frames.
+
-        if (avctx->codec_id == AV_CODEC_ID_H264) {
+        if (avctx->codec_id == AV_CODEC_ID_H264 ||
+            avctx->codec_id == AV_CODEC_ID_HEVC) {
             if (aframe.frame->dec_info.FrameType & MFX_FRAMETYPE_IDR)
                 frame->flags |= AV_FRAME_FLAG_KEY;
             else
                 frame->flags &= ~AV_FRAME_FLAG_KEY;
+        } else {
+            if (aframe.frame->dec_info.FrameType & MFX_FRAMETYPE_I)
+                frame->flags |= AV_FRAME_FLAG_KEY;
+            else
+                frame->flags &= ~AV_FRAME_FLAG_KEY;
         }
         frame->crop_left   = outsurf->Info.CropX;
         frame->crop_top    = outsurf->Info.CropY;