[Ffmpeg-cvslog] r6059 - trunk/libavcodec/mpegaudiodec.c

[michael]

Author: michael
Date: Thu Aug 24 02:03:51 2006
New Revision: 6059

Modified:
   trunk/libavcodec/mpegaudiodec.c

Log:
use memset() instead of slow c loops


Modified: trunk/libavcodec/mpegaudiodec.c
==============================================================================
--- trunk/libavcodec/mpegaudiodec.c	(original)
+++ trunk/libavcodec/mpegaudiodec.c	Thu Aug 24 02:03:51 2006
@@ -1686,18 +1686,20 @@
         linbits = mpa_huff_data[k][1];
         vlc = &huff_vlc[l];
 
+        if(!l){
+            memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid)*j);
+            s_index += 2*j;
+            continue;
+        }
+
         /* read huffcode and compute each couple */
         for(;j>0;j--) {
             if (get_bits_count(&s->gb) >= end_pos)
                 break;
-            if (l) {
-                y = get_vlc2(&s->gb, vlc->table, 8, 3);
-                x = y >> 4;
-                y = y & 0x0f;
-            } else {
-                x = 0;
-                y = 0;
-            }
+            y = get_vlc2(&s->gb, vlc->table, 8, 3);
+            x = y >> 4;
+            y = y & 0x0f;
+
             dprintf("region=%d n=%d x=%d y=%d exp=%d\n",
                     i, g->region_size[i] - j, x, y, exponents[s_index]);
             if (x) {
@@ -1756,8 +1758,7 @@
             g->sb_hybrid[s_index++] = v;
         }
     }
-    while (s_index < 576)
-        g->sb_hybrid[s_index++] = 0;
+    memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid)*(576 - s_index));
     return 0;
 }