With huge sampling rates, the table derivation method does not converge fast
enough. While fixing it using e.g. Newton-Rhapson-like methods (the curve is
nicely convex) is possible, it is much simpler to reject these cases.
The value of 96000 was arbitrarily chosen as a realistic value, though
1000000 would still work and converge.
Fixes ticket #3868.
Suggested-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
IMCContext *q = avctx->priv_data;
double r1, r2;
+ if (avctx->codec_id == AV_CODEC_ID_IAC && avctx->sample_rate > 96000) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Strange sample rate of %i, file likely corrupt or "
+ "needing a new table derivation method.\n",
+ avctx->sample_rate);
+ return AVERROR_PATCHWELCOME;
+ }
+
if (avctx->codec_id == AV_CODEC_ID_IMC)
avctx->channels = 1;