vf_dlopen: fix external pixel format names

"yv12" stopped working a while ago, and so did other FourCC-like names.
Make "yv12" work again, so that the examples in TOOLS/vf_dlopen/ work.

1 files changed, 35 insertions, 7 deletions

diff --git a/video/filter/vf_dlopen.c b/video/filter/vf_dlopen.c
index 81d924ca40..5bdd884c7a 100644
--- a/video/filter/vf_dlopen.c
+++ b/video/filter/vf_dlopen.c
@@ -72,8 +72,37 @@ static struct vf_priv_s {
     int argc;
 } const vf_priv_dflt = {};
 
+struct fmtname {
+    const char *name;
+    enum mp_imgfmt fmt;
+};
+
+// This table defines the pixel format names that are guaranteed to work.
+static const struct fmtname format_names[] = {
+    {"yv12", IMGFMT_420P},
+    {0}
+};
+
 //===========================================================================//
 
+static const char *imgfmt_to_name(int fmt)
+{
+    for (int n = 0; format_names[n].name; n++) {
+        if (format_names[n].fmt == fmt)
+            return format_names[n].name;
+    }
+    return mp_imgfmt_to_name(fmt);
+}
+
+static int name_to_imgfmt(const char *name)
+{
+    for (int n = 0; format_names[n].name; n++) {
+        if (strcasecmp(format_names[n].name, name) == 0)
+            return format_names[n].fmt;
+    }
+    return mp_imgfmt_from_name(bstr0(name), false);
+}
+
 static void set_imgprop(struct vf_dlopen_picdata *out, const mp_image_t *mpi)
 {
     int i;
@@ -98,7 +127,7 @@ static int config(struct vf_instance *vf,
     vf->priv->filter.in_height = height;
     vf->priv->filter.in_d_width = d_width;
     vf->priv->filter.in_d_height = d_height;
-    vf->priv->filter.in_fmt = mp_imgfmt_to_name(fmt);
+    vf->priv->filter.in_fmt = imgfmt_to_name(fmt);
     vf->priv->filter.out_width = width;
     vf->priv->filter.out_height = height;
     vf->priv->filter.out_d_width = d_width;
@@ -121,8 +150,7 @@ static int config(struct vf_instance *vf,
     vf->priv->out_height = vf->priv->filter.out_height;
 
     if (vf->priv->filter.out_fmt)
-        vf->priv->outfmt = mp_imgfmt_from_name(bstr0(vf->priv->filter.out_fmt),
-                                               false);
+        vf->priv->outfmt = name_to_imgfmt(vf->priv->filter.out_fmt);
     else {
         struct vf_dlopen_formatpair *p = vf->priv->filter.format_mapping;
         vf->priv->outfmt = 0;
@@ -130,13 +158,13 @@ static int config(struct vf_instance *vf,
             for (; p->from; ++p) {
                 // TODO support pixel format classes in matching
                 if (!strcmp(p->from, vf->priv->filter.in_fmt)) {
-                    vf->priv->outfmt = mp_imgfmt_from_name(bstr0(p->to), false);
+                    vf->priv->outfmt = name_to_imgfmt(p->to);
                     break;
                 }
             }
         } else
             vf->priv->outfmt = fmt;
-        vf->priv->filter.out_fmt = mp_imgfmt_to_name(vf->priv->outfmt);
+        vf->priv->filter.out_fmt = imgfmt_to_name(vf->priv->outfmt);
     }
 
     if (!vf->priv->outfmt) {
@@ -242,7 +270,7 @@ static int query_format(struct vf_instance *vf, unsigned int fmt)
         return 0;  // these can't really be filtered
     if (fmt == IMGFMT_PAL8)
         return 0;  // we don't have palette support, sorry
-    const char *fmtname = mp_imgfmt_to_name(fmt);
+    const char *fmtname = imgfmt_to_name(fmt);
     if (!fmtname)
         return 0;
     struct vf_dlopen_formatpair *p = vf->priv->filter.format_mapping;
@@ -251,7 +279,7 @@ static int query_format(struct vf_instance *vf, unsigned int fmt)
         for (; p->from; ++p) {
             // TODO support pixel format classes in matching
             if (!strcmp(p->from, fmtname)) {
-                outfmt = mp_imgfmt_from_name(bstr0(p->to), false);
+                outfmt = name_to_imgfmt(p->to);
                 break;
             }
         }