Port libmpcodec fixes from MPlayer.

libavfilter/libmpcodecs/vf_detc.c

@@ -382,7 +382,7 @@ static void uninit(struct vf_instance *vf)
 }
 
 static struct {
-        char *name;
+        const char *name;
         int (*func)(struct vf_priv_s *p, mp_image_t *new, mp_image_t *old);
         int needread;
 } anal_funcs[] = {

libavfilter/libmpcodecs/vf_dint.c

@@ -32,7 +32,7 @@ struct vf_priv_s {
   float sense; // first parameter
   float level; // second parameter
   unsigned int imgfmt;
-  char diff;
+  int diff;
   uint32_t max;
 //  int dfr;
 //  int rdfr;
@@ -73,7 +73,7 @@ static int config (struct vf_instance *vf,
       vf->priv->diff = 31;
     mp_msg (MSGT_VFILTER, MSGL_INFO, "Drop-interlaced: %dx%d diff %d / level %u\n",
            vf->priv->pmpi->width, vf->priv->pmpi->height,
-           (int)vf->priv->diff, (unsigned int)vf->priv->max);
+           vf->priv->diff, (unsigned int)vf->priv->max);
 //    vf->priv->rdfr = vf->priv->dfr = 0;
     vf->priv->was_dint = 0;
     return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
@@ -81,10 +81,10 @@ static int config (struct vf_instance *vf,
 
 static int put_image (struct vf_instance *vf, mp_image_t *mpi, double pts)
 {
-    char rrow0[MAXROWSIZE];
-    char rrow1[MAXROWSIZE];
-    char rrow2[MAXROWSIZE];
-    char *row0 = rrow0, *row1 = rrow1, *row2 = rrow2/*, *row3 = rrow3*/;
+    int8_t rrow0[MAXROWSIZE];
+    int8_t rrow1[MAXROWSIZE];
+    int8_t rrow2[MAXROWSIZE];
+    int8_t *row0 = rrow0, *row1 = rrow1, *row2 = rrow2/*, *row3 = rrow3*/;
     int rowsize = mpi->width;
     uint32_t nok = 0, max = vf->priv->max;
     int diff = vf->priv->diff;

libavfilter/libmpcodecs/vf_divtc.c

@@ -42,7 +42,7 @@ struct vf_priv_s
       ocount, sum[5];
    double threshold;
    FILE *file;
-   char *bdata;
+   int8_t *bdata;
    unsigned int *csdata;
    int *history;
    };
@@ -384,8 +384,8 @@ static int analyze(struct vf_priv_s *p)
    {
    int *buf=0, *bp, bufsize=0, n, b, f, i, j, m, s;
    unsigned int *cbuf=0, *cp;
-   char *pbuf;
-   char lbuf[256];
+   int8_t *pbuf;
+   int8_t lbuf[256];
    int sum[5];
    double d;