imgconvert: add self test code

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/Makefile

@@ -783,6 +783,7 @@ TESTPROGS = cabac                                                       \
             fft-fixed                                                   \
             golomb                                                      \
             iirfilter                                                   \
+            imgconvert                                                  \
             rangecoder                                                  \
             snowenc                                                     \
 

libavcodec/imgconvert.c

@@ -974,3 +974,18 @@ int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
     emms_c();
     return 0;
 }
+
+#ifdef TEST
+
+int main(void){
+    int i;
+    for (i=0; i<AV_PIX_FMT_NB*2; i++) {
+        AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
+        if(!desc)
+            continue;
+        av_log(0, AV_LOG_INFO, "pix fmt %s %d\n", desc->name, is_yuv_planar(i));
+    }
+    return 0;
+}
+
+#endif