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qdm2: check that the FFT size is a power of 2

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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
(cherry picked from commit 34f87a58532ed652a6e0283c1d044ee5df0aef0b)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Anton Khirnov 2013-04-09 15:25:20 +02:00 committed by Reinhard Tartler
parent 9b052bfb86
commit 96481c5e18
1 changed files with 4 additions and 0 deletions

4
libavcodec/qdm2.c

@ -1878,6 +1878,10 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_ERROR, "Unknown FFT order (%d), contact the developers!\n", s->fft_order);
return -1;
}
if (s->fft_size != (1 << (s->fft_order - 1))) {
av_log(avctx, AV_LOG_ERROR, "FFT size %d not power of 2.\n", s->fft_size);
return AVERROR_INVALIDDATA;
}
ff_rdft_init(&s->rdft_ctx, s->fft_order, IDFT_C2R);
ff_mpadsp_init(&s->mpadsp);