h264/PAFF preparation: use DELAYED_PIC_REF to mark non-refs frames as held for delayed output

patch by Jeff Downs, heydowns a borg d com
original thread:
Subject: [FFmpeg-devel] [PATCH] Implement PAFF in H.264
Date: 18/09/07 20:30

Originally committed as revision 10592 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 7 insertions, 2 deletions

diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 30fb0faf07..c2c8f13d4d 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -907,8 +907,13 @@ alloc:
             pic= (AVFrame*)&s->picture[i];
         }
 
-        pic->reference= (s->pict_type != B_TYPE || s->codec_id == CODEC_ID_H264)
-                        && !s->dropable ? 3 : 0;
+        pic->reference= 0;
+        if (!s->dropable){
+            if (s->codec_id == CODEC_ID_H264)
+                pic->reference = s->picture_structure;
+            else if (s->pict_type != B_TYPE)
+                pic->reference = 3;
+        }
 
         pic->coded_picture_number= s->coded_picture_number++;