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-rw-r--r--third_party/aom/aom_dsp/daalaboolreader.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/daalaboolreader.c b/third_party/aom/aom_dsp/daalaboolreader.c
index 4e224904e..6c2259f23 100644
--- a/third_party/aom/aom_dsp/daalaboolreader.c
+++ b/third_party/aom/aom_dsp/daalaboolreader.c
@@ -39,3 +39,9 @@ uint32_t aom_daala_reader_tell(const daala_reader *r) {
uint32_t aom_daala_reader_tell_frac(const daala_reader *r) {
return od_ec_dec_tell_frac(&r->ec);
}
+
+int aom_daala_reader_has_overflowed(const daala_reader *r) {
+ const uint32_t tell_bits = aom_daala_reader_tell(r);
+ const uint32_t tell_bytes = (tell_bits + 7) >> 3;
+ return ((ptrdiff_t)tell_bytes > r->buffer_end - r->buffer);
+}