@@ -86,20 +86,6 @@ static const AVOption options[] = {

 #define sidechaincompress_options options

 AVFILTER_DEFINE_CLASS(sidechaincompress);

-static av_cold int init(AVFilterContext *ctx)

-{

-    SidechainCompressContext *s = ctx->priv;

-

-    s->thres = log(s->threshold);

-    s->lin_knee_start = s->threshold / sqrt(s->knee);

-    s->adj_knee_start = s->lin_knee_start * s->lin_knee_start;

-    s->knee_start = log(s->lin_knee_start);

-    s->knee_stop = log(s->threshold * sqrt(s->knee));

-    s->compressed_knee_stop = (s->knee_stop - s->thres) / s->ratio + s->thres;

-

-    return 0;

-}

-

 // A fake infinity value (because real infinity may break some hosts)

 #define FAKE_INFINITY (65536.0 * 65536.0)

@@ -138,6 +124,13 @@ static int compressor_config_output(AVFilterLink *outlink)

     AVFilterContext *ctx = outlink->src;

     SidechainCompressContext *s = ctx->priv;

+    s->thres = log(s->threshold);

+    s->lin_knee_start = s->threshold / sqrt(s->knee);

+    s->adj_knee_start = s->lin_knee_start * s->lin_knee_start;

+    s->knee_start = log(s->lin_knee_start);

+    s->knee_stop = log(s->threshold * sqrt(s->knee));

+    s->compressed_knee_stop = (s->knee_stop - s->thres) / s->ratio + s->thres;

+

     s->attack_coeff = FFMIN(1., 1. / (s->attack * outlink->sample_rate / 4000.));

     s->release_coeff = FFMIN(1., 1. / (s->release * outlink->sample_rate / 4000.));

@@ -333,7 +326,6 @@ AVFilter ff_af_sidechaincompress = {

     .description    = NULL_IF_CONFIG_SMALL("Sidechain compressor."),

     .priv_size      = sizeof(SidechainCompressContext),

     .priv_class     = &sidechaincompress_class,

-    .init           = init,

     .query_formats  = query_formats,

     .inputs         = sidechaincompress_inputs,

     .outputs        = sidechaincompress_outputs,

@@ -427,7 +419,6 @@ AVFilter ff_af_acompressor = {

     .description    = NULL_IF_CONFIG_SMALL("Audio compressor."),

     .priv_size      = sizeof(SidechainCompressContext),

     .priv_class     = &acompressor_class,

-    .init           = init,

     .query_formats  = acompressor_query_formats,

     .inputs         = acompressor_inputs,

     .outputs        = acompressor_outputs,