+ // the sample rate is only allowed to be 64,128,256 * 44100 by ISO/IEC 14496-3:2005(E)
+ // We are a bit more tolerant here, but this check is needed to bound the size and duration
+ if (avctx->sample_rate > 512 * 44100)
+ return AVERROR_INVALIDDATA;
+
+
+ if (DST_SAMPLES_PER_FRAME(avctx->sample_rate) & 7) {
+ return AVERROR_PATCHWELCOME;
+ }
+