lavfi: Drop deprecated non-const filter retrieval

Deprecated in 10/2013.

libavfilter/avfilter.c

@@ -292,10 +292,7 @@ int ff_poll_frame(AVFilterLink *link)
 
 static AVFilter *first_filter;
 
-#if !FF_API_NOCONST_GET_NAME
-const
-#endif
-AVFilter *avfilter_get_by_name(const char *name)
+const AVFilter *avfilter_get_by_name(const char *name)
 {
     const AVFilter *f = NULL;
 

libavfilter/avfilter.h

@@ -449,10 +449,7 @@ int avfilter_register(AVFilter *filter);
  * @return     the filter definition, if any matching one is registered.
  *             NULL if none found.
  */
-#if !FF_API_NOCONST_GET_NAME
-const
-#endif
-AVFilter *avfilter_get_by_name(const char *name);
+const AVFilter *avfilter_get_by_name(const char *name);
 
 /**
  * Iterate over all registered filters.

libavfilter/avfiltergraph.c

@@ -293,7 +293,7 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
 
             if (convert_needed) {
                 AVFilterContext *convert;
-                AVFilter *filter;
+                const AVFilter *filter;
                 AVFilterLink *inlink, *outlink;
                 char scale_args[256];
                 char inst_name[30];
@@ -759,7 +759,7 @@ static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx)
         for (j = 0; j < f->nb_inputs; j++) {
             AVFilterLink *link = f->inputs[j];
             AVFilterContext *fifo_ctx;
-            AVFilter *fifo;
+            const AVFilter *fifo;
             char name[32];
 
             if (!link->dstpad->needs_fifo)

libavfilter/graphparser.c

@@ -131,7 +131,7 @@ static void append_sws_flags(const char **args, const char *sws_opts, char *tmp)
 static int create_filter(AVFilterContext **filt_ctx, AVFilterGraph *ctx, int index,
                          const char *filt_name, const char *args, void *log_ctx)
 {
-    AVFilter *filt;
+    const AVFilter *filt;
     char inst_name[30];
     char tmp_args[TMP_ARGS_SIZE];
     int ret;

libavfilter/version.h

@@ -49,8 +49,4 @@
  * the public API and may change, break or disappear at any time.
  */
 
-#ifndef FF_API_NOCONST_GET_NAME
-#define FF_API_NOCONST_GET_NAME             (LIBAVFILTER_VERSION_MAJOR < 7)
-#endif
-
 #endif /* AVFILTER_VERSION_H */