avcodec/qdm2: move static init to normal init to avoid initializing tables that might never be used

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/qdm2.c

@@ -1750,12 +1750,19 @@ static void qdm2_synthesis_filter(QDM2Context *q, int index)
  *
  * @param q    context
  */
-static av_cold void qdm2_init_static_data(AVCodec *codec) {
+static av_cold void qdm2_init_static_data(void) {
+    static int done;
+
+    if(done)
+        return;
+
     qdm2_init_vlc();
     ff_mpa_synth_init_float(ff_mpa_synth_window_float);
     softclip_table_init();
     rnd_table_init();
     init_noise_samples();
+
+    done = 1;
 }
 
 /**
@@ -1768,6 +1775,8 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx)
     int extradata_size;
     int tmp_val, tmp, size;
 
+    qdm2_init_static_data();
+
     /* extradata parsing
 
     Structure:
@@ -2044,7 +2053,6 @@ AVCodec ff_qdm2_decoder = {
     .id               = AV_CODEC_ID_QDM2,
     .priv_data_size   = sizeof(QDM2Context),
     .init             = qdm2_decode_init,
-    .init_static_data = qdm2_init_static_data,
     .close            = qdm2_decode_close,
     .decode           = qdm2_decode_frame,
     .capabilities     = CODEC_CAP_DR1,