Add a simple base64 encoder for use in tests

Originally committed as revision 24526 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 53 insertions, 0 deletions

diff --git a/tests/base64.c b/tests/base64.c
new file mode 100644
index 0000000000..75ba8bc5d2
--- /dev/null
+++ b/tests/base64.c
@@ -0,0 +1,53 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * Based on libavutil/base64.c
+ */
+
+#include <stdio.h>
+
+int main(void)
+{
+    static const char b64[] =
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    unsigned i_bits = 0;
+    int i_shift = 0;
+    int out_len = 0;
+    int in;
+
+#define putb64() do {                                   \
+        putchar(b64[(i_bits << 6 >> i_shift) & 0x3f]);  \
+        out_len++;                                      \
+        i_shift -= 6;                                   \
+    } while (0)
+
+    while ((in = getchar()) != EOF) {
+        i_bits = (i_bits << 8) + in;
+        i_shift += 8;
+        while (i_shift > 6)
+            putb64();
+    }
+    while (i_shift > 0)
+        putb64();
+    while (out_len++ & 3)
+        putchar('=');
+    putchar('\n');
+
+    return 0;
+}