libavcodec/adpcm.c:1244: error: Uninitialized Value
  The value read from shift[_] was never initialized.

libavcodec/adpcm.c:1244:21: 
1242.             for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1243.                 for(channel = 0; channel < avctx->channels; channel++) {
1244.                     int32_t sample = (int32_t)(((*(src+channel) >> i) & 0x0F) << 0x1C) >> shift[channel];
                          ^
1245.                     sample = (sample +
1246.                              c->status[channel].sample1 * coeff[channel][0] +
