avcodec/mpegaudioenc: prevent overflow in fixed point code

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2026-06-16 04:32:47 +02:00 · 2013-11-17 21:14:15 +01:00
parent b382d09d29
commit 9f630e8346
1 changed files with 2 additions and 0 deletions
@@ -704,6 +704,8 @@ static void encode_frame(MpegAudioContext *s,
                                    q1 = sample >> shift;
                                q1 = (q1 * mult) >> P;
                                q[m] = ((q1 + (1 << P)) * steps) >> (P + 1);
+                                if (q[m] < 0)
+                                    q[m] = 0;
                            }
 #endif
                            if (q[m] >= steps)