@@ -36,6 +36,7 @@

 #define AC3_BLOCK_SIZE  256

 #define AC3_MAX_BLOCKS    6

 #define AC3_FRAME_SIZE (AC3_MAX_BLOCKS * 256)

+#define AC3_WINDOW_SIZE (AC3_BLOCK_SIZE * 2)

 /* exponent encoding strategy */

 #define EXP_REUSE 0

@@ -1187,7 +1187,7 @@ static int AC3_encode_frame(AVCodecContext *avctx,

     AC3EncodeContext *s = avctx->priv_data;

     const int16_t *samples = data;

     int i, j, k, v, ch;

-    int16_t input_samples[AC3_BLOCK_SIZE*2];

+    int16_t input_samples[AC3_WINDOW_SIZE];

     int32_t mdct_coef[AC3_MAX_BLOCKS][AC3_MAX_CHANNELS][AC3_MAX_COEFS];

     uint8_t exp[AC3_MAX_BLOCKS][AC3_MAX_CHANNELS][AC3_MAX_COEFS];

     uint8_t exp_strategy[AC3_MAX_BLOCKS][AC3_MAX_CHANNELS];

@@ -1219,17 +1219,17 @@ static int AC3_encode_frame(AVCodecContext *avctx,

             for(j=0;j<AC3_BLOCK_SIZE;j++) {

                 input_samples[j] = MUL16(input_samples[j],

                                          ff_ac3_window[j]) >> 15;

-                input_samples[AC3_BLOCK_SIZE*2-j-1] = MUL16(input_samples[AC3_BLOCK_SIZE*2-j-1],

+                input_samples[AC3_WINDOW_SIZE-j-1] = MUL16(input_samples[AC3_WINDOW_SIZE-j-1],

                                              ff_ac3_window[j]) >> 15;

             }

             /* Normalize the samples to use the maximum available

                precision */

-            v = 14 - log2_tab(input_samples, AC3_BLOCK_SIZE*2);

+            v = 14 - log2_tab(input_samples, AC3_WINDOW_SIZE);

             if (v < 0)

                 v = 0;

             exp_samples[i][ch] = v - 9;

-            lshift_tab(input_samples, AC3_BLOCK_SIZE*2, v);

+            lshift_tab(input_samples, AC3_WINDOW_SIZE, v);

             /* do the MDCT */

             mdct512(mdct_coef[i][ch], input_samples);