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, 25 insertions, 8 deletions

diff --git a/tests/utils.c b/tests/utils.c
index 5310a114f5..2fdc491f49 100644
--- a/tests/utils.c
+++ b/tests/utils.c
@@ -115,20 +115,37 @@ static void pgmyuv_save(const char *filename, int w, int h,
 
     rgb24_to_yuv420p(lum_tab, cb_tab, cr_tab, rgb_tab, w, h);
 
-    f = fopen(filename, "wb");
-    fprintf(f, "P5\n%d %d\n%d\n", w, h * 3 / 2, 255);
+    if (filename) {
+        f = fopen(filename, "wb");
+        fprintf(f, "P5\n%d %d\n%d\n", w, h * 3 / 2, 255);
+    } else {
+        f = stdout;
+    }
+
     err_if(fwrite(lum_tab, 1, w * h, f) != w * h);
     h2 = h / 2;
     w2 = w / 2;
     cb = cb_tab;
     cr = cr_tab;
-    for (i = 0; i < h2; i++) {
-        err_if(fwrite(cb, 1, w2, f) != w2);
-        err_if(fwrite(cr, 1, w2, f) != w2);
-        cb += w2;
-        cr += w2;
+
+    if (filename) {
+        for (i = 0; i < h2; i++) {
+            err_if(fwrite(cb, 1, w2, f) != w2);
+            err_if(fwrite(cr, 1, w2, f) != w2);
+            cb += w2;
+            cr += w2;
+        }
+        fclose(f);
+    } else {
+        for (i = 0; i < h2; i++) {
+            err_if(fwrite(cb, 1, w2, f) != w2);
+            cb += w2;
+        }
+        for (i = 0; i < h2; i++) {
+            err_if(fwrite(cr, 1, w2, f) != w2);
+            cr += w2;
+        }
     }
-    fclose(f);
 
     free(lum_tab);
     free(cb_tab);