avfilter/buffersink: replace init_opaque by init

The argument 'opaque' is always NULL since 0acf7e26 (2013),
and avfilter_init_filter() was removed in 52067b3c (2016).

libavfilter/buffersink.c

@@ -199,20 +199,6 @@ MAKE_AVFILTERLINK_ACCESSOR(int              , sample_rate        )
 
 MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef *    , hw_frames_ctx      )
 
-static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
-{
-    BufferSinkContext *buf = ctx->priv;
-    AVBufferSinkParams *params = opaque;
-    int ret;
-
-    if (params) {
-        if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0)
-            return ret;
-    }
-
-    return common_init(ctx);
-}
-
 #define CHECK_LIST_SIZE(field) \
         if (buf->field ## _size % sizeof(*buf->field)) { \
             av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
@@ -242,23 +228,6 @@ static int vsink_query_formats(AVFilterContext *ctx)
     return 0;
 }
 
-static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
-{
-    BufferSinkContext *buf = ctx->priv;
-    AVABufferSinkParams *params = opaque;
-    int ret;
-
-    if (params) {
-        if ((ret = av_opt_set_int_list(buf, "sample_fmts",     params->sample_fmts,  AV_SAMPLE_FMT_NONE, 0)) < 0 ||
-            (ret = av_opt_set_int_list(buf, "sample_rates",    params->sample_rates,    -1, 0)) < 0 ||
-            (ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 ||
-            (ret = av_opt_set_int_list(buf, "channel_counts",  params->channel_counts,  -1, 0)) < 0 ||
-            (ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0)
-            return ret;
-    }
-    return common_init(ctx);
-}
-
 static int asink_query_formats(AVFilterContext *ctx)
 {
     BufferSinkContext *buf = ctx->priv;
@@ -345,7 +314,7 @@ AVFilter ff_vsink_buffer = {
     .description   = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
     .priv_size     = sizeof(BufferSinkContext),
     .priv_class    = &buffersink_class,
-    .init_opaque   = vsink_init,
+    .init          = common_init,
     .query_formats = vsink_query_formats,
     .activate      = activate,
     .inputs        = avfilter_vsink_buffer_inputs,
@@ -365,7 +334,7 @@ AVFilter ff_asink_abuffer = {
     .description   = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
     .priv_class    = &abuffersink_class,
     .priv_size     = sizeof(BufferSinkContext),
-    .init_opaque   = asink_init,
+    .init          = common_init,
     .query_formats = asink_query_formats,
     .activate      = activate,
     .inputs        = avfilter_asink_abuffer_inputs,