Module: libav
Branch: release/0.7
Commit: 96481c5e1843dda64df1df22f3bc12e6b10505fd

Author:    Anton Khirnov <[email protected]>
Committer: Reinhard Tartler <[email protected]>
Date:      Tue Apr  9 15:25:20 2013 +0200

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

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:[email protected]
(cherry picked from commit 34f87a58532ed652a6e0283c1d044ee5df0aef0b)

Signed-off-by: Reinhard Tartler <[email protected]>

---

 libavcodec/qdm2.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c
index 258a343..87ace65 100644
--- a/libavcodec/qdm2.c
+++ b/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);

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