get_bits: add get_bitsz for reading 0-25 bits

This can be used to simplify code in a couple of places.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/libavcodec/get_bits.h b/libavcodec/get_bits.h
index 0a61c805b7..4cf61d6f1b 100644
--- a/libavcodec/get_bits.h
+++ b/libavcodec/get_bits.h
@@ -269,6 +269,14 @@ static inline unsigned int get_bits(GetBitContext *s, int n)
     return tmp;
 }
 
+/**
+ * Read 0-25 bits.
+ */
+static av_always_inline int get_bitsz(GetBitContext *s, int n)
+{
+    return n ? get_bits(s, n) : 0;
+}
+
 static inline unsigned int get_bits_le(GetBitContext *s, int n)
 {
     register int tmp;