[FFmpeg-cvslog] avcodec/mpegpicture: Mark dummy frames as such

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sun Apr 28 01:43:32 2024 +0200| [73676dd47ac36f975b430f6a60a09144357523c3] | committer: Andreas Rheinhardt

avcodec/mpegpicture: Mark dummy frames as such

This will allow to avoid outputting them.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=73676dd47ac36f975b430f6a60a09144357523c3
---

 libavcodec/mpegpicture.c   | 2 ++
 libavcodec/mpegpicture.h   | 1 +
 libavcodec/mpegvideo_dec.c | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/libavcodec/mpegpicture.c b/libavcodec/mpegpicture.c
index aa882cf747..88b4d5dec1 100644
--- a/libavcodec/mpegpicture.c
+++ b/libavcodec/mpegpicture.c
@@ -270,6 +270,7 @@ void ff_mpeg_unref_picture(Picture *pic)
     if (pic->needs_realloc)
         free_picture_tables(pic);
 
+    pic->dummy         = 0;
     pic->field_picture = 0;
     pic->b_frame_score = 0;
     pic->needs_realloc = 0;
@@ -331,6 +332,7 @@ int ff_mpeg_ref_picture(Picture *dst, Picture *src)
     ff_refstruct_replace(&dst->hwaccel_picture_private,
                           src->hwaccel_picture_private);
 
+    dst->dummy                   = src->dummy;
     dst->field_picture           = src->field_picture;
     dst->b_frame_score           = src->b_frame_score;
     dst->needs_realloc           = src->needs_realloc;
diff --git a/libavcodec/mpegpicture.h b/libavcodec/mpegpicture.h
index 215e7388ef..664c116a47 100644
--- a/libavcodec/mpegpicture.h
+++ b/libavcodec/mpegpicture.h
@@ -70,6 +70,7 @@ typedef struct Picture {
     /// RefStruct reference for hardware accelerator private data
     void *hwaccel_picture_private;
 
+    int dummy;                  ///< Picture is a dummy and should not be output
     int field_picture;          ///< whether or not the picture was encoded in separate fields
 
     int b_frame_score;
diff --git a/libavcodec/mpegvideo_dec.c b/libavcodec/mpegvideo_dec.c
index efc257d43e..bf274e0c48 100644
--- a/libavcodec/mpegvideo_dec.c
+++ b/libavcodec/mpegvideo_dec.c
@@ -288,6 +288,8 @@ static int av_cold alloc_dummy_frame(MpegEncContext *s, Picture **picp, Picture
     if (ret < 0)
         return ret;
 
+    pic->dummy = 1;
+
     ff_mpeg_unref_picture(wpic);
     ret = ff_mpeg_ref_picture(wpic, pic);
     if (ret < 0) {