avcodec/snow: Move initializing HpelDSPContext to snowenc.c

Only used by the encoder.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

configure

@@ -2979,7 +2979,7 @@ screenpresso_decoder_deps="zlib"
 shorten_decoder_select="bswapdsp"
 sipr_decoder_select="lsp"
 smvjpeg_decoder_select="mjpeg_decoder"
-snow_decoder_select="dwt h264qpel hpeldsp rangecoder videodsp"
+snow_decoder_select="dwt h264qpel rangecoder videodsp"
 snow_encoder_select="dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder videodsp"
 sonic_decoder_select="golomb rangecoder"
 sonic_encoder_select="golomb rangecoder"

libavcodec/snow.c

@@ -401,7 +401,6 @@ av_cold int ff_snow_common_init(AVCodecContext *avctx){
     s->max_ref_frames=1; //just make sure it's not an invalid value in case of no initial keyframe
     s->spatial_decomposition_count = 1;
 
-    ff_hpeldsp_init(&s->hdsp, avctx->flags);
     ff_videodsp_init(&s->vdsp, 8);
     ff_dwt_init(&s->dwt);
     ff_h264qpel_init(&s->h264qpel, 8);

libavcodec/snowenc.c

@@ -152,6 +152,8 @@ static av_cold int encode_init(AVCodecContext *avctx)
         s->plane[plane_index].fast_mc= 1;
     }
 
+    // Must be before ff_snow_common_init()
+    ff_hpeldsp_init(&s->hdsp, avctx->flags);
     if ((ret = ff_snow_common_init(avctx)) < 0) {
         return ret;
     }