@@ -43,8 +43,8 @@ typedef struct {

     int in_temp;

 } ADXContext;

-#define    BASEVOL   0x4000

-#define    SCALE1    0x7298

-#define    SCALE2    0x3350

+#define COEFF_BITS  12

+#define COEFF1      0x1CA6

+#define COEFF2      0x0CD4

 #endif /* AVCODEC_ADX_H */

@@ -59,7 +59,7 @@ static void adx_decode(ADXContext *c, int16_t *out, const uint8_t *in, int ch)

     s2 = prev->s2;

     for (i = 0; i < 32; i++) {

         d  = get_sbits(&gb, 4);

-        s0 = (BASEVOL * d * scale + SCALE1 * s1 - SCALE2 * s2) >> 14;

+        s0 = ((d << COEFF_BITS) * scale + COEFF1 * s1 - COEFF2 * s2) >> COEFF_BITS;

         s2 = s1;

         s1 = av_clip_int16(s0);

         *out = s1;

@@ -48,7 +48,7 @@ static void adx_encode(unsigned char *adx,const short *wav,

     s2 = prev->s2;

     for(i=0;i<32;i++) {

         s0 = wav[i];

-        d = ((s0<<14) - SCALE1*s1 + SCALE2*s2)/BASEVOL;

+        d = ((s0 << COEFF_BITS) - COEFF1 * s1 + COEFF2 * s2) >> COEFF_BITS;

         data[i]=d;

         if (max<d) max=d;

         if (min>d) min=d;