fate: teach videogen/rotozoom to output a single raw video stream

This makes videogen/rotozoom output a raw video stream on stdout
if no output directory is specified.

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 12 insertions, 5 deletions

diff --git a/tests/rotozoom.c b/tests/rotozoom.c
index 48c06b017e..683e070860 100644
--- a/tests/rotozoom.c
+++ b/tests/rotozoom.c
@@ -159,12 +159,15 @@ int main(int argc, char **argv)
     int w, h, i;
     char buf[1024];
 
-    if (argc != 3) {
-        printf("usage: %s directory/ image.pnm\n"
+    if (argc > 3) {
+        printf("usage: %s image.pnm [directory/]\n"
                "generate a test video stream\n", argv[0]);
         return 1;
     }
 
+    if (argc < 3)
+        err_if(!freopen(NULL, "wb", stdout));
+
     w = DEFAULT_WIDTH;
     h = DEFAULT_HEIGHT;
 
@@ -173,13 +176,17 @@ int main(int argc, char **argv)
     width   = w;
     height  = h;
 
-    if (init_demo(argv[2]))
+    if (init_demo(argv[1]))
         return 1;
 
     for (i = 0; i < DEFAULT_NB_PICT; i++) {
-        snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[1], i);
         gen_image(i, w, h);
-        pgmyuv_save(buf, w, h, rgb_tab);
+        if (argc > 2) {
+            snprintf(buf, sizeof(buf), "%s%02d.pgm", argv[2], i);
+            pgmyuv_save(buf, w, h, rgb_tab);
+        } else {
+            pgmyuv_save(NULL, w, h, rgb_tab);
+        }
     }
 
     free(rgb_tab);