stb_vorbis: fix theoretical seek performance problem

ago%!(EXTRA string=6 years) · 6ca87a9e0e
parent 052dce117e
commit 6ca87a9e0e
1 changed files with 10 additions and 8 deletions
--- a/stb_vorbis.c
+++ b/stb_vorbis.c
@ -4707,14 +4707,16 @@ static int seek_to_sample_coarse(stb_vorbis *f, uint32 sample_number)
      }

      // if we've just found the last page again then we're in a tricky file,
-      // and we're close enough.
-      if (mid.page_start == right.page_start)
-         break;
-
-      if (sample_number < mid.last_decoded_sample)
-         right = mid;
-      else
-         left = mid;
+      // and we're close enough (if it wasn't an interpolation probe).
+      if (mid.page_start == right.page_start) {
+         if (probe >= 2)
+            break;
+      } else {
+         if (last_sample_limit < mid.last_decoded_sample)
+            right = mid;
+         else
+            left = mid;
+      }

      ++probe;
   }