From 9d2a0355299c7c6004f1b804e6339e5e8759cd27 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sat, 23 Mar 2002 20:21:33 +0000
Subject: [PATCH] fixing motion estimation with h263p hopefully

Originally committed as revision 355 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/h263.c      | 13 +++++++++----
 libavcodec/mpegvideo.c | 11 +++++++++--
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 329db31..4513288 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -51,6 +51,7 @@ extern UINT32 inverse[256];
 
 static UINT16 mv_penalty[MAX_FCODE][MAX_MV*2+1];
 static UINT8 fcode_tab[MAX_MV*2+1];
+static UINT8 umv_fcode_tab[MAX_MV*2+1];
 
 int h263_get_picture_format(int width, int height)
 {
@@ -689,13 +690,16 @@ static void init_mv_penalty_and_fcode(MpegEncContext *s)
             mv_penalty[f_code][mv+MAX_MV]= len;
         }
     }
-    
 
     for(f_code=MAX_FCODE; f_code>0; f_code--){
         for(mv=-(16<<f_code); mv<(16<<f_code); mv++){
             fcode_tab[mv+MAX_MV]= f_code;
         }
     }
+
+    for(mv=0; mv<MAX_MV*2+1; mv++){
+        umv_fcode_tab[mv]= 1;
+    }
 }
 
 void h263_encode_init(MpegEncContext *s)
@@ -709,10 +713,11 @@ void h263_encode_init(MpegEncContext *s)
 
         init_mv_penalty_and_fcode(s);
     }
-    s->mv_penalty= mv_penalty;
+    s->mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p
     
-    // use fcodes >1 only for mpeg4&h263 FIXME
-    if(!s->h263_msmpeg4) s->fcode_tab= fcode_tab;
+    // use fcodes >1 only for mpeg4 & h263 & h263p FIXME
+    if(s->h263_plus)      s->fcode_tab= umv_fcode_tab;
+    else if(s->h263_pred) s->fcode_tab= fcode_tab;
 }
 
 static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 839fe1a..5a5060b 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -381,6 +381,9 @@ int MPV_encode_init(AVCodecContext *avctx)
     else if (s->out_format == FMT_MPEG1)
         mpeg1_encode_init(s);
 
+    /* dont use mv_penalty table for crap MV as it would be confused */
+    if(s->full_search<4) s->mv_penalty= default_mv_penalty;
+
     s->encoding = 1;
 
     /* init */
@@ -1126,8 +1129,8 @@ static void encode_picture(MpegEncContext *s, int picture_number)
         }
     }
 
-    /* find best f_code */
-    if(s->pict_type==P_TYPE){
+    /* find best f_code for ME which do unlimited searches */
+    if(s->pict_type==P_TYPE && s->full_search>3){
         int mv_num[8];
         int i;
         int loose=0;
@@ -1149,6 +1152,10 @@ static void encode_picture(MpegEncContext *s, int picture_number)
             if(loose > 10) break; //FIXME this is pretty ineffective
         }
         s->f_code= i;
+/*        for(i=0; i<=MAX_FCODE; i++){
+            printf("%d ", mv_num[i]);
+        }
+        printf("\n");*/
     }else{
         s->f_code= 1;
     }
-- 
2.7.4