[vlc-devel] commit: Improved preroll in avcodec. (Laurent Aimar )

[git version control]

vlc | branch: master | Laurent Aimar <fenrir at videolan.org> | Sat Mar 14 20:43:15 2009 +0100| [f5060d12c31af094d9105143c88371487ff2c72c] | committer: Laurent Aimar 

Improved preroll in avcodec.

Do not decode non reference pictures while prerolling.
It improves seek performance when decoding with ffmpeg.

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=f5060d12c31af094d9105143c88371487ff2c72c
---

 modules/codec/avcodec/video.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/modules/codec/avcodec/video.c b/modules/codec/avcodec/video.c
index d28be23..2c9c831 100644
--- a/modules/codec/avcodec/video.c
+++ b/modules/codec/avcodec/video.c
@@ -498,6 +498,11 @@ picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
             p_sys->p_context->skip_frame = p_sys->i_skip_frame;
         b_null_size = true;
     }
+    else if( !b_drawpicture )
+    {
+        p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
+                                              AVDISCARD_NONREF );
+    }
 
     /*
      * Do the actual decoding now
@@ -562,8 +567,9 @@ picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
 
         if( i_used < 0 )
         {
-            msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
-                      p_sys->i_buffer );
+            if( b_drawpicture )
+                msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
+                          p_sys->i_buffer );
             block_Release( p_block );
             return NULL;
         }