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Merge "Cleaning up vp9_rc_compute_frame_size_bounds()."

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This commit is contained in:
Dmitry Kovalev 2014-04-15 14:58:31 -07:00 committed by Gerrit Code Review
commit 0391790f24
1 changed files with 5 additions and 17 deletions
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22
vp9/encoder/vp9_ratectrl.c
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@ -1018,31 +1018,19 @@ int vp9_rc_pick_q_and_bounds(const VP9_COMP *cpi,
}
void vp9_rc_compute_frame_size_bounds(const VP9_COMP *cpi,
int this_frame_target,
int frame_target,
int *frame_under_shoot_limit,
int *frame_over_shoot_limit) {
// Set-up bounds on acceptable frame size:
if (cpi->oxcf.end_usage == USAGE_CONSTANT_QUALITY) {
*frame_under_shoot_limit = 0;
*frame_over_shoot_limit = INT_MAX;
} else {
int recode_tolerance =
(cpi->sf.recode_tolerance * this_frame_target) / 100;
*frame_over_shoot_limit = this_frame_target + recode_tolerance;
*frame_under_shoot_limit = this_frame_target - recode_tolerance;
// For very small rate targets where the fractional adjustment
// may be tiny make sure there is at least a minimum range.
*frame_over_shoot_limit += 200;
*frame_under_shoot_limit -= 200;
if (*frame_under_shoot_limit < 0)
*frame_under_shoot_limit = 0;
// Clip to maximum allowed rate for a frame.
if (*frame_over_shoot_limit > cpi->rc.max_frame_bandwidth) {
*frame_over_shoot_limit = cpi->rc.max_frame_bandwidth;
}
const int tolerance = (cpi->sf.recode_tolerance * frame_target) / 100;
*frame_under_shoot_limit = MAX(frame_target - tolerance - 200, 0);
*frame_over_shoot_limit = MIN(frame_target + tolerance + 200,
cpi->rc.max_frame_bandwidth);
}
}