This is consistent with the AV_BASE64_SIZE macro and avoids the literal
use of constants in the code.
TODO: update APIchanges and bump minor.
---
libavutil/base64.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/libavutil/base64.h b/libavutil/base64.h
index 514498e..e8a6e41 100644
--- a/libavutil/base64.h
+++ b/libavutil/base64.h
@@ -29,20 +29,25 @@
* @{
*/
-
/**
* Decode a base64-encoded string.
*
* @param out buffer for decoded data
* @param in null-terminated input string
* @param out_size size in bytes of the out buffer, must be at
- * least 3/4 of the length of in
+ * least 3/4 of the length of in, that is
AV_BASE64_DECODE_SIZE(strlen(in))
* @return number of bytes written, or a negative value in case of
* invalid input
*/
int av_base64_decode(uint8_t *out, const char *in, int out_size);
/**
+ * Calculate the output size in bytes needed to decode a base64 string
+ * with lenght x to a data buffer.
+ */
+#define AV_BASE64_DECODE_SIZE(x) ((x) * 3 / 4)
+
+/**
* Encode data to base64 and null-terminate.
*
* @param out buffer for encoded data
--
1.9.1
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