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Merge "Improve framerate adaptation"

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John Koleszar 2011-05-13 11:18:42 -07:00 committed by Code Review
commit eafdc5e10a
1 changed files with 34 additions and 9 deletions
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43
vp8/encoder/onyx_if.c
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@ -4714,23 +4714,48 @@ int vp8_get_compressed_data(VP8_PTR ptr, unsigned int *frame_flags, unsigned lon
// adjust frame rates based on timestamps given
if (!cm->refresh_alt_ref_frame)
{
long long this_duration;
int step = 0;
if (cpi->source->ts_start == cpi->first_time_stamp_ever)
{
double this_fps = 10000000.000 / (cpi->source->ts_end - cpi->source->ts_start);
vp8_new_frame_rate(cpi, this_fps);
this_duration = cpi->source->ts_end - cpi->source->ts_start;
step = 1;
}
else
{
long long nanosecs = cpi->source->ts_end
- cpi->last_end_time_stamp_seen;
long long last_duration;
if (nanosecs > 0)
this_duration = cpi->source->ts_end - cpi->last_end_time_stamp_seen;
last_duration = cpi->last_end_time_stamp_seen
- cpi->last_time_stamp_seen;
// do a step update if the duration changes by 10%
if (last_duration)
step = ((this_duration - last_duration) * 10 / last_duration);
}
if (this_duration)
{
if (step)
vp8_new_frame_rate(cpi, 10000000.0 / this_duration);
else
{
double this_fps = 10000000.000 / nanosecs;
vp8_new_frame_rate(cpi, (7 * cpi->oxcf.frame_rate + this_fps) / 8);
}
double avg_duration, interval;
/* Average this frame's rate into the last second's average
* frame rate. If we haven't seen 1 second yet, then average
* over the whole interval seen.
*/
interval = cpi->source->ts_end - cpi->first_time_stamp_ever;
if(interval > 10000000.0)
interval = 10000000;
avg_duration = 10000000.0 / cpi->oxcf.frame_rate;
avg_duration *= (interval - avg_duration + this_duration);
avg_duration /= interval;
vp8_new_frame_rate(cpi, 10000000.0 / avg_duration);
}
}
cpi->last_time_stamp_seen = cpi->source->ts_start;