This would have also helped a bitstream reader with a cache
of 32 bits.
---
libavcodec/bitstream_template.h | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/libavcodec/bitstream_template.h b/libavcodec/bitstream_template.h
index 3f90fc6a07..c27e8108b2 100644
--- a/libavcodec/bitstream_template.h
+++ b/libavcodec/bitstream_template.h
@@ -423,8 +423,18 @@ static inline const uint8_t *BS_FUNC(align)(BSCTX *bc)
*/
static inline int BS_FUNC(read_xbits)(BSCTX *bc, unsigned int n)
{
- int32_t cache = BS_FUNC(peek)(bc, 32);
- int sign = ~cache >> 31;
+ int32_t cache;
+ int sign;
+
+ if (n > bc->bits_valid)
+ BS_FUNC(priv_refill_32)(bc);
+
+#if defined(BITSTREAM_READER_LE)
+ cache = bc->bits & 0xFFFFFFFF;
+#else
+ cache = bc->bits >> 32;
+#endif
+ sign = ~cache >> 31;
BS_FUNC(skip_remaining)(bc, n);
return ((((uint32_t)(sign ^ cache)) >> (32 - n)) ^ sign) - sign;
--
2.42.0
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