avcodec/snow: Move initializing MotionEstContext to snowenc.c

Only used by the encoder.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

configure

@@ -2946,7 +2946,7 @@ screenpresso_decoder_deps="zlib"
 shorten_decoder_select="bswapdsp"
 sipr_decoder_select="lsp"
 smvjpeg_decoder_select="mjpeg_decoder"
-snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
+snow_decoder_select="dwt h264qpel hpeldsp 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

@@ -23,7 +23,6 @@
 #include "avcodec.h"
 #include "decode.h"
 #include "encode.h"
-#include "me_cmp.h"
 #include "snow_dwt.h"
 #include "snow.h"
 #include "snowdata.h"
@@ -434,7 +433,6 @@ 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_me_cmp_init(&s->mecc, avctx);
     ff_hpeldsp_init(&s->hdsp, avctx->flags);
     ff_videodsp_init(&s->vdsp, 8);
     ff_dwt_init(&s->dwt);

libavcodec/snowenc.c

@@ -26,6 +26,7 @@
 #include "avcodec.h"
 #include "codec_internal.h"
 #include "encode.h"
+#include "me_cmp.h"
 #include "packet_internal.h"
 #include "snow_dwt.h"
 #include "snow.h"
@@ -66,6 +67,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
     if ((ret = ff_snow_common_init(avctx)) < 0) {
         return ret;
     }
+    ff_me_cmp_init(&s->mecc, avctx);
     ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx);
 
     ff_snow_alloc_blocks(s);