From b1247e7c1ffc5c95400c2d3adce9406a6c040a8c Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Thu, 3 Oct 2024 19:15:58 +0200
Subject: [PATCH] lavfi/avfilter: move AVFilterContext.ready to FFFilterContext

This field is private to the generic filtering code.
---
 libavfilter/avfilter.c          |  9 ++++++---
 libavfilter/avfilter.h          |  7 ++++---
 libavfilter/avfilter_internal.h |  7 +++++++
 libavfilter/avfiltergraph.c     | 18 +++++++++++-------
 libavfilter/version_major.h     |  1 +
 5 files changed, 29 insertions(+), 13 deletions(-)

diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index dc06ebab4d..1a0e94b21d 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -237,7 +237,8 @@ static void update_link_current_pts(FilterLinkInternal *li, int64_t pts)
 
 void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)
 {
-    filter->ready = FFMAX(filter->ready, priority);
+    FFFilterContext *ctxi = fffilterctx(filter);
+    ctxi->ready = FFMAX(ctxi->ready, priority);
 }
 
 /**
@@ -473,6 +474,7 @@ void ff_tlog_link(void *ctx, AVFilterLink *link, int end)
 int ff_request_frame(AVFilterLink *link)
 {
     FilterLinkInternal * const li = ff_link_internal(link);
+    FFFilterContext * const ctxi_dst = fffilterctx(link->dst);
 
     FF_TPRINTF_START(NULL, request_frame); ff_tlog_link(NULL, link, 1);
 
@@ -482,7 +484,7 @@ int ff_request_frame(AVFilterLink *link)
     if (li->status_in) {
         if (ff_framequeue_queued_frames(&li->fifo)) {
             av_assert1(!li->frame_wanted_out);
-            av_assert1(link->dst->ready >= 300);
+            av_assert1(ctxi_dst->ready >= 300);
             return 0;
         } else {
             /* Acknowledge status change. Filters using ff_request_frame() will
@@ -1384,12 +1386,13 @@ static int ff_filter_activate_default(AVFilterContext *filter)
 
 int ff_filter_activate(AVFilterContext *filter)
 {
+    FFFilterContext *ctxi = fffilterctx(filter);
     int ret;
 
     /* Generic timeline support is not yet implemented but should be easy */
     av_assert1(!(filter->filter->flags & AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC &&
                  filter->filter->activate));
-    filter->ready = 0;
+    ctxi->ready = 0;
     ret = filter->filter->activate ? filter->filter->activate(filter) :
           ff_filter_activate_default(filter);
     if (ret == FFERROR_NOT_READY)
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index f2c4a64004..1748dd3023 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -518,12 +518,13 @@ struct AVFilterContext {
      */
     AVBufferRef *hw_device_ctx;
 
+#if FF_API_CONTEXT_PUBLIC
     /**
-     * Ready status of the filter.
-     * A non-0 value means that the filter needs activating;
-     * a higher value suggests a more urgent activation.
+     * @deprecated this field should never have been accessed by callers
      */
+    attribute_deprecated
     unsigned ready;
+#endif
 
     /**
      * Sets the number of extra hardware frames which the filter will
diff --git a/libavfilter/avfilter_internal.h b/libavfilter/avfilter_internal.h
index 9ba890a70c..7041d787b0 100644
--- a/libavfilter/avfilter_internal.h
+++ b/libavfilter/avfilter_internal.h
@@ -102,6 +102,13 @@ typedef struct FFFilterContext {
 
     // AV_CLASS_STATE_FLAG_*
     unsigned state_flags;
+
+    /**
+     * Ready status of the filter.
+     * A non-0 value means that the filter needs activating;
+     * a higher value suggests a more urgent activation.
+     */
+    unsigned ready;
 } FFFilterContext;
 
 static inline FFFilterContext *fffilterctx(AVFilterContext *ctx)
diff --git a/libavfilter/avfiltergraph.c b/libavfilter/avfiltergraph.c
index 38077ff701..7bc7700743 100644
--- a/libavfilter/avfiltergraph.c
+++ b/libavfilter/avfiltergraph.c
@@ -1470,15 +1470,19 @@ int avfilter_graph_request_oldest(AVFilterGraph *graph)
 
 int ff_filter_graph_run_once(AVFilterGraph *graph)
 {
-    AVFilterContext *filter;
+    FFFilterContext *ctxi;
     unsigned i;
 
     av_assert0(graph->nb_filters);
-    filter = graph->filters[0];
-    for (i = 1; i < graph->nb_filters; i++)
-        if (graph->filters[i]->ready > filter->ready)
-            filter = graph->filters[i];
-    if (!filter->ready)
+    ctxi = fffilterctx(graph->filters[0]);
+    for (i = 1; i < graph->nb_filters; i++) {
+        FFFilterContext *ctxi_other = fffilterctx(graph->filters[i]);
+
+        if (ctxi_other->ready > ctxi->ready)
+            ctxi = ctxi_other;
+    }
+
+    if (!ctxi->ready)
         return AVERROR(EAGAIN);
-    return ff_filter_activate(filter);
+    return ff_filter_activate(&ctxi->p);
 }
diff --git a/libavfilter/version_major.h b/libavfilter/version_major.h
index b2c761370f..41374fbbe5 100644
--- a/libavfilter/version_major.h
+++ b/libavfilter/version_major.h
@@ -37,5 +37,6 @@
 
 #define FF_API_LINK_PUBLIC     (LIBAVFILTER_VERSION_MAJOR < 11)
 #define FF_API_BUFFERSINK_OPTS (LIBAVFILTER_VERSION_MAJOR < 11)
+#define FF_API_CONTEXT_PUBLIC  (LIBAVFILTER_VERSION_MAJOR < 11)
 
 #endif /* AVFILTER_VERSION_MAJOR_H */