[gegl] Replace avcodec_decode_* with avcodec_send_packet/avcodec_receive_frame

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 8be339ebb67c9c3fd0177ded85491a3a5f6bea0a
Author: Behnam Momeni <sbmomeni gmail com>
Date:   Fri Mar 4 20:25:50 2022 +0330

    Replace avcodec_decode_* with avcodec_send_packet/avcodec_receive_frame

 operations/external/ff-load.c | 34 ++++++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 8 deletions(-)
---
diff --git a/operations/external/ff-load.c b/operations/external/ff-load.c
index 8327ad41d..c8889f342 100644
--- a/operations/external/ff-load.c
+++ b/operations/external/ff-load.c
@@ -223,14 +223,23 @@ decode_audio (GeglOperation *operation,
           static AVFrame frame;
           int got_frame;
 
-          decoded_bytes = avcodec_decode_audio4(p->audio_ctx,
-                                     &frame, &got_frame, &pkt);
-
+          decoded_bytes = avcodec_send_packet (p->audio_ctx, &pkt);
           if (decoded_bytes < 0)
             {
-              fprintf (stderr, "avcodec_decode_audio4 failed for %s\n",
+              fprintf (stderr, "avcodec_send_packet failed for %s\n",
                                 o->path);
             }
+          else
+            {
+              decoded_bytes = avcodec_receive_frame (p->audio_ctx, &frame);
+              if (decoded_bytes < 0)
+                {
+                  fprintf (stderr, "avcodec_receive_frame failed for %s\n",
+                                    o->path);
+                }
+              else
+                got_frame = 1;
+            }
 
           if (got_frame) {
             int samples_left = frame.nb_samples;
@@ -356,15 +365,24 @@ decode_frame (GeglOperation *operation,
           }
           while (pkt.stream_index != p->video_index);
 
-          decoded_bytes = avcodec_decode_video2 (
-                 p->video_ctx, p->lavc_frame,
-                 &got_picture, &pkt);
+          decoded_bytes = avcodec_send_packet (p->video_ctx, &pkt);
           if (decoded_bytes < 0)
             {
-              fprintf (stderr, "avcodec_decode_video failed for %s\n",
+              fprintf (stderr, "avcodec_send_packet failed for %s\n",
                        o->path);
               return -1;
             }
+          else
+            {
+              decoded_bytes = avcodec_receive_frame (p->video_ctx, p->lavc_frame);
+              if (decoded_bytes < 0)
+                {
+                  fprintf (stderr, "avcodec_receive_frame failed for %s\n",
+                                    o->path);
+                }
+              else
+                got_picture = 1;
+            }
 
           if(got_picture)
           {