avcodec/mpegvideo: check that the context is initialized in ff_mpv_common_frame_size_...

[ffmpeg] / libavcodec / mpeg12.c

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 27d680fd85cdcc76d63c81471715fc925edf0d92..fc43a53701139d86fefeadc6877d9f7725767fd0 100644 (file)
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -70,21 +70,21 @@ static const uint8_t table_mb_btype[11][2] = {
 #define INIT_2D_VLC_RL(rl, static_size)\
 {\
     static RL_VLC_ELEM rl_vlc_table[static_size];\
-    INIT_VLC_STATIC(&rl.vlc, TEX_VLC_BITS, rl.n + 2,\
-                    &rl.table_vlc[0][1], 4, 2,\
-                    &rl.table_vlc[0][0], 4, 2, static_size);\
-\
     rl.rl_vlc[0] = rl_vlc_table;\
-    init_2d_vlc_rl(&rl);\
+    init_2d_vlc_rl(&rl, static_size);\
 }
 
-static av_cold void init_2d_vlc_rl(RLTable *rl)
+static av_cold void init_2d_vlc_rl(RLTable *rl, unsigned static_size)
 {
     int i;
-
-    for (i = 0; i < rl->vlc.table_size; i++) {
-        int code = rl->vlc.table[i][0];
-        int len  = rl->vlc.table[i][1];
+    VLC_TYPE table[680][2] = {{0}};
+    VLC vlc = { .table = table, .table_allocated = static_size };
+    av_assert0(static_size <= FF_ARRAY_ELEMS(table));
+    init_vlc(&vlc, TEX_VLC_BITS, rl->n + 2, &rl->table_vlc[0][1], 4, 2, &rl->table_vlc[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC);
+
+    for (i = 0; i < vlc.table_size; i++) {
+        int code = vlc.table[i][0];
+        int len  = vlc.table[i][1];
         int level, run;
 
         if (len == 0) { // illegal code