ffmpeg | branch: master | Christophe Gisquet <christophe.gisq...@gmail.com> | Thu Aug 21 12:21:07 2014 +0200| [4728cdd88033c2bd41ae675d7df9aaf3f578136b] | committer: Michael Niedermayer
imc: reject files with unfathomable sampling rates 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 <one...@gmail.com> Signed-off-by: Michael Niedermayer <michae...@gmx.at> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4728cdd88033c2bd41ae675d7df9aaf3f578136b --- libavcodec/imc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/libavcodec/imc.c b/libavcodec/imc.c index e6a087a..0df0dd1 100644 --- a/libavcodec/imc.c +++ b/libavcodec/imc.c @@ -180,6 +180,14 @@ static av_cold int imc_decode_init(AVCodecContext *avctx) 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; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
