[FFmpeg-devel] [PATCH 1/8] avfilter/avfilter: add a side_data field to AVFilterLink

[James Almer]

This will be used to propagate global side data through the filterchain.

Signed-off-by: James Almer <jamrial at gmail.com>
---
 libavfilter/avfilter.c | 16 +++++++++++++++-
 libavfilter/avfilter.h |  3 +++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 235c9ea14a..02779453b5 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -206,6 +206,7 @@ static void link_free(AVFilterLink **link)
     ff_framequeue_free(&li->fifo);
     ff_frame_pool_uninit(&li->frame_pool);
     av_channel_layout_uninit(&(*link)->ch_layout);
+    av_frame_side_data_free(&(*link)->side_data, &(*link)->nb_side_data);
 
     av_buffer_unref(&li->l.hw_frames_ctx);
 
@@ -376,7 +377,20 @@ int ff_filter_config_links(AVFilterContext *filter)
                                                     "callbacks on all outputs\n");
                     return AVERROR(EINVAL);
                 }
-            } else if ((ret = config_link(link)) < 0) {
+            }
+
+            if (inlink && inlink->nb_side_data && !link->nb_side_data) {
+                for (i = 0; i < inlink->nb_side_data; i++) {
+                    ret = av_frame_side_data_clone(&link->side_data, &link->nb_side_data,
+                                                   inlink->side_data[i], 0);
+                    if (ret < 0) {
+                        av_frame_side_data_free(&link->side_data, &link->nb_side_data);
+                        return ret;
+                    }
+                }
+            }
+
+            if (config_link && (ret = config_link(link)) < 0) {
                 av_log(link->src, AV_LOG_ERROR,
                        "Failed to configure output pad on %s\n",
                        link->src->name);
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index b88b31a834..9b8d75c68b 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -613,6 +613,9 @@ struct AVFilterLink {
      */
     AVRational time_base;
 
+    AVFrameSideData **side_data;
+    int nb_side_data;
+
     /*****************************************************************
      * All fields below this line are not part of the public API. They
      * may not be used outside of libavfilter and can be changed and
-- 
2.47.1