avfilter/formats: Add test for ff_parse_channel_layout()

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

libavfilter/formats.c

@@ -669,12 +669,41 @@ int main(void)
 {
     const int64_t *cl;
     char buf[512];
+    int i;
+    const char *teststrings[] ={
+        "blah",
+        "1",
+        "2",
+        "-1",
+        "60",
+        "65",
+        "1c",
+        "2c",
+        "-1c",
+        "60c",
+        "65c",
+        "5.1",
+        "stereo",
+        "1+1+1+1",
+        "1c+1c+1c+1c",
+        "2c+1c",
+        "0x3",
+    };
 
     for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) {
         av_get_channel_layout_string(buf, sizeof(buf), -1, *cl);
         printf("%s\n", buf);
     }
 
+    for ( i = 0; i<FF_ARRAY_ELEMS(teststrings); i++) {
+        int64_t layout = -1;
+        int count = -1;
+        int ret;
+        ret = ff_parse_channel_layout(&layout, &count, teststrings[i], NULL);
+
+        printf ("%d = ff_parse_channel_layout(%016"PRIX64", %2d, %s);\n", ret ? -1 : 0, layout, count, teststrings[i]);
+    }
+
     return 0;
 }