From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 30 May 2008 19:48:02 +0000 (+0000)
Subject: Make init_vlc* support proper static tables instead of this broken beyond
X-Git-Tag: v0.5~4370
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ccc54864fef9afed00a32c0fc1394a78cf6e971e;p=platform%2Fupstream%2Flibav.git

Make init_vlc* support proper static tables instead of this broken beyond
imagination alloc_static() trash.

Originally committed as revision 13561 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavcodec/bitstream.c b/libavcodec/bitstream.c
index f02c9c7..823bf97 100644
--- a/libavcodec/bitstream.c
+++ b/libavcodec/bitstream.c
@@ -110,6 +110,8 @@ static int alloc_table(VLC *vlc, int size, int use_static)
     index = vlc->table_size;
     vlc->table_size += size;
     if (vlc->table_size > vlc->table_allocated) {
+        if(use_static>1)
+            abort(); //cant do anything, init_vlc() is used with too little memory
         vlc->table_allocated += (1 << vlc->bits);
         if(use_static)
             vlc->table = ff_realloc_static(vlc->table,
@@ -135,7 +137,7 @@ static int build_table(VLC *vlc, int table_nb_bits,
     VLC_TYPE (*table)[2];
 
     table_size = 1 << table_nb_bits;
-    table_index = alloc_table(vlc, table_size, flags & INIT_VLC_USE_STATIC);
+    table_index = alloc_table(vlc, table_size, flags & (INIT_VLC_USE_STATIC|INIT_VLC_USE_NEW_STATIC));
 #ifdef DEBUG_VLC
     av_log(NULL,AV_LOG_DEBUG,"new table index=%d size=%d code_prefix=%x n=%d\n",
            table_index, table_size, code_prefix, n_prefix);
@@ -264,7 +266,13 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
              int flags)
 {
     vlc->bits = nb_bits;
-    if(!(flags & INIT_VLC_USE_STATIC)) {
+    if(flags & INIT_VLC_USE_NEW_STATIC){
+        if(vlc->table_size && vlc->table_size == vlc->table_allocated){
+            return 0;
+        }else if(vlc->table_size){
+            abort(); // fatal error, we are called on a partially initialized table
+        }
+    }else if(!(flags & INIT_VLC_USE_STATIC)) {
         vlc->table = NULL;
         vlc->table_allocated = 0;
         vlc->table_size = 0;
@@ -287,6 +295,8 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
         av_freep(&vlc->table);
         return -1;
     }
+    if((flags & INIT_VLC_USE_NEW_STATIC) && vlc->table_size != vlc->table_allocated)
+        av_log(NULL, AV_LOG_ERROR, "needed %d had %d\n", vlc->table_size, vlc->table_allocated);
     return 0;
 }
 
diff --git a/libavcodec/bitstream.h b/libavcodec/bitstream.h
index 68b9cf6..8d2d795 100644
--- a/libavcodec/bitstream.h
+++ b/libavcodec/bitstream.h
@@ -800,8 +800,9 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
              const void *codes, int codes_wrap, int codes_size,
              const void *symbols, int symbols_wrap, int symbols_size,
              int flags);
-#define INIT_VLC_USE_STATIC 1
+#define INIT_VLC_USE_STATIC 1 ///< VERY strongly deprecated and forbidden
 #define INIT_VLC_LE         2
+#define INIT_VLC_USE_NEW_STATIC 4
 void free_vlc(VLC *vlc);
 
 /**