From 704311b2946d74a80f65906961cd9baaa18683a3 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sat, 1 Jul 2017 12:09:58 +0200
Subject: [PATCH] decode: add a per-frame private data for hwaccel use

This will be useful in the CUVID hwaccel. It should also eventually
replace current decoder-specific mechanisms used by various other
hwaccels.
---
 libavcodec/decode.c | 3 +++
 libavcodec/decode.h | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 9050b57b0b..c76ee6696a 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -1025,6 +1025,9 @@ static void decode_data_free(void *opaque, uint8_t *data)
     if (fdd->post_process_opaque_free)
         fdd->post_process_opaque_free(fdd->post_process_opaque);
 
+    if (fdd->hwaccel_priv_free)
+        fdd->hwaccel_priv_free(fdd->hwaccel_priv);
+
     av_freep(&fdd);
 }
 
diff --git a/libavcodec/decode.h b/libavcodec/decode.h
index 72052f1de5..235f355f82 100644
--- a/libavcodec/decode.h
+++ b/libavcodec/decode.h
@@ -49,6 +49,12 @@ typedef struct FrameDecodeData {
     int (*post_process)(void *logctx, AVFrame *frame);
     void *post_process_opaque;
     void (*post_process_opaque_free)(void *opaque);
+
+    /**
+     * Per-frame private data for hwaccels.
+     */
+    void *hwaccel_priv;
+    void (*hwaccel_priv_free)(void *priv);
 } FrameDecodeData;
 
 /**