avio_rl32(pb); /* number of samples */
st->codec->sample_rate = avio_rl32(pb);
- if (ff_alloc_extradata(st->codec, 2 * 4))
- return AVERROR(ENOMEM);
-
/* initial predictor values for adpcm decoder */
- avio_read(pb, st->codec->extradata, 2 * 4);
+ if (ff_get_extradata(st->codec, pb, 2 * 4) < 0)
+ return AVERROR(ENOMEM);
if (avio_rl32(pb)) {
st->codec->channels = 2;