jpeg2000dec: initialize static data just once

libavcodec/jpeg2000dec.c

@@ -1264,8 +1264,6 @@ static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
     // reduction factor, i.e number of resolution levels to skip
     s->reduction_factor = s->lowres;
 
-    ff_jpeg2000_init_tier1_luts();
-
     if (s->buf_end - s->buf < 2)
         return AVERROR(EINVAL);
 
@@ -1308,6 +1306,11 @@ end:
     return ret ? ret : s->buf - s->buf_start;
 }
 
+static void jpeg2000_init_static_data(AVCodec *codec)
+{
+    ff_jpeg2000_init_tier1_luts();
+}
+
 #define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
 
@@ -1340,6 +1343,7 @@ AVCodec ff_jpeg2000_decoder = {
     .id               = AV_CODEC_ID_JPEG2000,
     .capabilities     = CODEC_CAP_FRAME_THREADS,
     .priv_data_size   = sizeof(Jpeg2000DecoderContext),
+    .init_static_data = jpeg2000_init_static_data,
     .decode           = jpeg2000_decode_frame,
     .priv_class       = &class,
     .pix_fmts         = (enum PixelFormat[]) { AV_PIX_FMT_XYZ12,