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Fix for divide by zero in vp8_adjust_key_frame.

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Change-Id: I3bf9bdd95abfd287fbcb644f4fb85fb9204be95a
This commit is contained in:
Marco Paniconi
2013-01-31 10:46:39 -08:00
parent 14301116e2
commit ec6cf493ff
1 changed files with 6 additions and 2 deletions
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8
vp8/encoder/ratectrl.c
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@@ -1360,10 +1360,10 @@ static int estimate_keyframe_frequency(VP8_COMP *cpi)
* whichever is smaller. * whichever is smaller.
*/ */
int key_freq = cpi->oxcf.key_freq>0 ? cpi->oxcf.key_freq : 1; int key_freq = cpi->oxcf.key_freq>0 ? cpi->oxcf.key_freq : 1;
av_key_frame_frequency = (int)cpi->output_frame_rate * 2; av_key_frame_frequency = 1 + (int)cpi->output_frame_rate * 2;
if (cpi->oxcf.auto_key && av_key_frame_frequency > key_freq) if (cpi->oxcf.auto_key && av_key_frame_frequency > key_freq)
av_key_frame_frequency = cpi->oxcf.key_freq; av_key_frame_frequency = key_freq;
cpi->prior_key_frame_distance[KEY_FRAME_CONTEXT - 1] cpi->prior_key_frame_distance[KEY_FRAME_CONTEXT - 1]
= av_key_frame_frequency; = av_key_frame_frequency;
@@ -1393,6 +1393,10 @@ static int estimate_keyframe_frequency(VP8_COMP *cpi)
av_key_frame_frequency /= total_weight; av_key_frame_frequency /= total_weight;
} }
// TODO (marpan): Given the checks above, |av_key_frame_frequency|
// should always be above 0. But for now we keep the sanity check in.
if (av_key_frame_frequency == 0)
av_key_frame_frequency = 1;
return av_key_frame_frequency; return av_key_frame_frequency;
} }