From 6ba6ec40e364beaedeb97c97beb2bed90798424f Mon Sep 17 00:00:00 2001
From: Romain Vimont <rom@rom1v.com>
Date: Sun, 11 Apr 2021 15:39:00 +0200
Subject: [PATCH] Add frame sink trait

This trait will allow to abstract the concrete sink types from the frame
producer (decoder.c).
---
 app/src/trait/frame_sink.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 app/src/trait/frame_sink.h

diff --git a/app/src/trait/frame_sink.h b/app/src/trait/frame_sink.h
new file mode 100644
index 00000000..10d2f670
--- /dev/null
+++ b/app/src/trait/frame_sink.h
@@ -0,0 +1,24 @@
+#ifndef SC_FRAME_SINK
+#define SC_FRAME_SINK
+
+#include "common.h"
+
+#include <assert.h>
+#include <stdbool.h>
+
+/**
+ * Frame sink trait.
+ *
+ * Component able to receive AVFrames should implement this trait.
+ */
+struct sc_frame_sink {
+    const struct sc_frame_sink_ops *ops;
+};
+
+struct sc_frame_sink_ops {
+    bool (*open)(struct sc_frame_sink *sink);
+    void (*close)(struct sc_frame_sink *sink);
+    bool (*push)(struct sc_frame_sink *sink, const AVFrame *frame);
+};
+
+#endif