move init_vlc_rl from h263.c to mpegvideo.c

Originally committed as revision 9578 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 53 insertions, 0 deletions

diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 01369da8fc..208b408a65 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -742,6 +742,59 @@ void init_rl(RLTable *rl, uint8_t static_store[2][2*MAX_RUN + MAX_LEVEL + 3])
     }
 }
 
+void init_vlc_rl(RLTable *rl, int use_static)
+{
+    int i, q;
+
+    /* Return if static table is already initialized */
+    if(use_static && rl->rl_vlc[0])
+        return;
+
+    init_vlc(&rl->vlc, 9, rl->n + 1,
+             &rl->table_vlc[0][1], 4, 2,
+             &rl->table_vlc[0][0], 4, 2, use_static);
+
+
+    for(q=0; q<32; q++){
+        int qmul= q*2;
+        int qadd= (q-1)|1;
+
+        if(q==0){
+            qmul=1;
+            qadd=0;
+        }
+        if(use_static)
+            rl->rl_vlc[q]= av_mallocz_static(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
+        else
+            rl->rl_vlc[q]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM));
+        for(i=0; i<rl->vlc.table_size; i++){
+            int code= rl->vlc.table[i][0];
+            int len = rl->vlc.table[i][1];
+            int level, run;
+
+            if(len==0){ // illegal code
+                run= 66;
+                level= MAX_LEVEL;
+            }else if(len<0){ //more bits needed
+                run= 0;
+                level= code;
+            }else{
+                if(code==rl->n){ //esc
+                    run= 66;
+                    level= 0;
+                }else{
+                    run=   rl->table_run  [code] + 1;
+                    level= rl->table_level[code] * qmul + qadd;
+                    if(code >= rl->last) run+=192;
+                }
+            }
+            rl->rl_vlc[q][i].len= len;
+            rl->rl_vlc[q][i].level= level;
+            rl->rl_vlc[q][i].run= run;
+        }
+    }
+}
+
 /* draw the edges of width 'w' of an image of size width, height */
 //FIXME check that this is ok for mpeg4 interlaced
 static void draw_edges_c(uint8_t *buf, int wrap, int width, int height, int w)