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wmaenc: limit allowed sample rate to 48kHz

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ff_wma_init() allows up to 50kHz, but this generates an exponent band
size table that requires 65 bands. The code assumes 25 bands in many
places, and using sample rates higher than 48kHz will lead to buffer
overwrites.

CC:libav-stable@libav.org
(cherry picked from commit 1ec075cfec)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
This commit is contained in:
Justin Ruggles 2012-03-02 16:27:57 -05:00 committed by Reinhard Tartler
parent 74bd46e82a
commit 43e3e7764c
1 changed files with 6 additions and 0 deletions
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6
libavcodec/wmaenc.c
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@ -39,6 +39,12 @@ static int encode_init(AVCodecContext * avctx){
return AVERROR(EINVAL);
}
if (avctx->sample_rate > 48000) {
av_log(avctx, AV_LOG_ERROR, "sample rate is too high: %d > 48kHz",
avctx->sample_rate);
return AVERROR(EINVAL);
}
if(avctx->bit_rate < 24*1000) {
av_log(avctx, AV_LOG_ERROR, "bitrate too low: got %i, need 24000 or higher\n",
avctx->bit_rate);