1 files changed, 10 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/bitreader_buffer.c b/third_party/aom/aom_dsp/bitreader_buffer.c
index 02b5ef924..b53211784 100644
--- a/third_party/aom/aom_dsp/bitreader_buffer.c
+++ b/third_party/aom/aom_dsp/bitreader_buffer.c
@@ -55,3 +55,13 @@ int aom_rb_read_inv_signed_literal(struct aom_read_bit_buffer *rb, int bits) {
   const unsigned value = (unsigned)aom_rb_read_literal(rb, bits + 1) << nbits;
   return ((int)value) >> nbits;
 }
+
+uint32_t aom_rb_read_uvlc(struct aom_read_bit_buffer *rb) {
+  int leading_zeros = 0;
+  while (!aom_rb_read_bit(rb)) ++leading_zeros;
+  // Maximum 32 bits.
+  if (leading_zeros >= 32) return UINT32_MAX;
+  const uint32_t base = (1u << leading_zeros) - 1;
+  const uint32_t value = aom_rb_read_literal(rb, leading_zeros);
+  return base + value;
+}