add 64-bit bytestream read/write functions

Originally committed as revision 9523 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/bytestream.h

@@ -24,25 +24,34 @@
 
 #include "common.h"
 
-#define DEF(name, bytes, read, write)\
-static av_always_inline unsigned int bytestream_get_ ## name(uint8_t **b){\
+#define DEF_T(type, name, bytes, read, write)                             \
+static av_always_inline type bytestream_get_ ## name(uint8_t **b){\
     (*b) += bytes;\
     return read(*b - bytes);\
 }\
-static av_always_inline void bytestream_put_ ##name(uint8_t **b, const unsigned int value){\
+static av_always_inline void bytestream_put_ ##name(uint8_t **b, const type value){\
     write(*b, value);\
     (*b) += bytes;\
 }
 
+#define DEF(name, bytes, read, write) \
+    DEF_T(unsigned int, name, bytes, read, write)
+#define DEF64(name, bytes, read, write) \
+    DEF_T(uint64_t, name, bytes, read, write)
+
+DEF64(le64, 8, AV_RL64, AV_WL64)
 DEF(le32, 4, AV_RL32, AV_WL32)
 DEF(le24, 3, AV_RL24, AV_WL24)
 DEF(le16, 2, AV_RL16, AV_WL16)
+DEF64(be64, 8, AV_RB64, AV_WB64)
 DEF(be32, 4, AV_RB32, AV_WB32)
 DEF(be24, 3, AV_RB24, AV_WB24)
 DEF(be16, 2, AV_RB16, AV_WB16)
 DEF(byte, 1, AV_RB8 , AV_WB8 )
 
 #undef DEF
+#undef DEF64
+#undef DEF_T
 
 static av_always_inline unsigned int bytestream_get_buffer(uint8_t **b, uint8_t *dst, unsigned int size)
 {