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g722enc: validate AVCodecContext.trellis

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This commit is contained in:
Justin Ruggles 2012-01-06 16:01:07 -05:00
parent 77c5b66cbe
commit cf1a259ad6
1 changed files with 16 additions and 0 deletions
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16
libavcodec/g722enc.c
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@ -36,6 +36,11 @@
problems, so we limit it to a reasonable value */
#define MAX_FRAME_SIZE 32768
/* We clip the value of avctx->trellis to prevent data type overflows and
undefined behavior. Using larger values is insanely slow anyway. */
#define MIN_TRELLIS 0
#define MAX_TRELLIS 16
static av_cold int g722_encode_init(AVCodecContext * avctx)
{
G722Context *c = avctx->priv_data;
@ -83,6 +88,17 @@ static av_cold int g722_encode_init(AVCodecContext * avctx)
avctx->frame_size = 320;
}
if (avctx->trellis) {
/* validate trellis */
if (avctx->trellis < MIN_TRELLIS || avctx->trellis > MAX_TRELLIS) {
int new_trellis = av_clip(avctx->trellis, MIN_TRELLIS, MAX_TRELLIS);
av_log(avctx, AV_LOG_WARNING, "Requested trellis value is not "
"allowed. Using %d instead of %d\n", new_trellis,
avctx->trellis);
avctx->trellis = new_trellis;
}
}
return 0;
}