Moving dv_anchor back to the global scope. This creates a tiny memory

   leak for cases like dlopening libavcodec.so and such, but I still
   don't know how to catch such events.

Originally committed as revision 4818 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/dv.c

@@ -49,11 +49,11 @@ typedef struct DVVideoContext {
     void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
     void (*fdct[2])(DCTELEM *block);
     void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
-
-    /* MultiThreading */
-    uint8_t** dv_anchor;
 } DVVideoContext;
 
+/* MultiThreading - applies to entire DV codec, not just the avcontext */
+uint8_t** dv_anchor;
+
 #define TEX_VLC_BITS 9
 
 #ifdef DV_CODEC_TINY_TARGET
@@ -118,12 +118,12 @@ static int dvvideo_init(AVCodecContext *avctx)
             return -ENOMEM;
 
         /* dv_anchor lets each thread know its Id */
-        s->dv_anchor = av_malloc(12*27*sizeof(void*));
-        if (!s->dv_anchor) {
+        dv_anchor = av_malloc(12*27*sizeof(void*));
+        if (!dv_anchor) {
             return -ENOMEM;
         }
         for (i=0; i<12*27; i++)
-            s->dv_anchor[i] = (void*)(size_t)i;
+            dv_anchor[i] = (void*)(size_t)i;
 
         /* it's faster to include sign bit in a generic VLC parsing scheme */
         for (i=0, j=0; i<NB_DV_VLC; i++, j++) {
@@ -150,10 +150,9 @@ static int dvvideo_init(AVCodecContext *avctx)
                  new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0);
 
         dv_rl_vlc = av_mallocz_static(dv_vlc.table_size * sizeof(RL_VLC_ELEM));
-        if (!dv_rl_vlc) {
-            av_free(s->dv_anchor);
+        if (!dv_rl_vlc)
             return -ENOMEM;
-        }
+
         for(i = 0; i < dv_vlc.table_size; i++){
             int code= dv_vlc.table[i][0];
             int len = dv_vlc.table[i][1];
@@ -939,7 +938,7 @@ static int dvvideo_decode_frame(AVCodecContext *avctx,
     s->picture.top_field_first = 0;
 
     s->buf = buf;
-    avctx->execute(avctx, dv_decode_mt, (void**)&s->dv_anchor[0], NULL,
+    avctx->execute(avctx, dv_decode_mt, (void**)&dv_anchor[0], NULL,
                    s->sys->difseg_size * 27);
 
     emms_c();
@@ -968,7 +967,7 @@ static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
     s->picture.pict_type = FF_I_TYPE;
 
     s->buf = buf;
-    c->execute(c, dv_encode_mt, (void**)&s->dv_anchor[0], NULL,
+    c->execute(c, dv_encode_mt, (void**)&dv_anchor[0], NULL,
                s->sys->difseg_size * 27);
 
     emms_c();
@@ -977,9 +976,6 @@ static int dvvideo_encode_frame(AVCodecContext *c, uint8_t *buf, int buf_size,
 
 static int dvvideo_close(AVCodecContext *c)
 {
-    DVVideoContext *s = c->priv_data;
-
-    av_free(s->dv_anchor);
 
     return 0;
 }