alacenc: fix incorrect buffer use

[ffmpeg] / libavcodec / alacenc.c

diff --git a/libavcodec/alacenc.c b/libavcodec/alacenc.c
index b9ad899e16a87099411de6dc9ec832ce3009d2a7..fd5bf66005eff32f8f5265bd82f061da47ac56df 100644 (file)
--- a/libavcodec/alacenc.c
+++ b/libavcodec/alacenc.c
@@ -444,7 +444,7 @@ static void write_element(AlacEncodeContext *s,
             // TODO: determine when this will actually help. for now it's not used.
             if (prediction_type == 15) {
                 // 2nd pass 1st order filter
-                int32_t *residual = s->predictor_buf[channels];
+                int32_t *residual = s->predictor_buf[i];
                 for (j = s->frame_size - 1; j > 0; j--)
                     residual[j] -= residual[j - 1];
             }