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vp9: Modify logic for gf setting based on up-coming key frame.

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For 1 pass vbr mode:
Refactor to move the logic for gf setting based on up-coming
key frames to a separate function, so same logic can be used for
scene-cuts/changes.

Change-Id: Ic4ede308e08ba869bb62e4566e19ea31222c5229
This commit is contained in:
Marco 2016-05-04 18:11:19 -07:00
parent 3d7e2677df
commit 1fc21052ab
1 changed files with 28 additions and 25 deletions
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53
vp9/encoder/vp9_ratectrl.c
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@ -1512,6 +1512,22 @@ static int calc_iframe_target_size_one_pass_vbr(const VP9_COMP *const cpi) {
return vp9_rc_clamp_iframe_target_size(cpi, target);
}
static void adjust_gf_key_frame(VP9_COMP *cpi) {
RATE_CONTROL *const rc = &cpi->rc;
rc->constrained_gf_group = 0;
// Reset gf interval to make more equal spacing for up-coming key frame.
if ((rc->frames_to_key <= 7 * rc->baseline_gf_interval >> 2) &&
(rc->frames_to_key > rc->baseline_gf_interval)) {
rc->baseline_gf_interval = rc->frames_to_key >> 1;
rc->constrained_gf_group = 1;
} else {
// Reset since frames_till_gf_update_due must be <= frames_to_key.
if (rc->baseline_gf_interval > rc->frames_to_key) {
rc->baseline_gf_interval = rc->frames_to_key;
rc->constrained_gf_group = 1;
}
}
}
void vp9_rc_get_one_pass_vbr_params(VP9_COMP *cpi) {
VP9_COMMON *const cm = &cpi->common;
RATE_CONTROL *const rc = &cpi->rc;
@ -1541,31 +1557,19 @@ void vp9_rc_get_one_pass_vbr_params(VP9_COMP *cpi) {
rc->baseline_gf_interval =
(rc->min_gf_interval + rc->max_gf_interval) / 2;
}
// Reset the gf interval to make more equal spacing for up-coming key frame.
if ((rc->frames_to_key <= 7 * rc->baseline_gf_interval >> 2) &&
(rc->frames_to_key > rc->baseline_gf_interval)) {
rc->baseline_gf_interval = rc->frames_to_key >> 1;
} else {
// Increase gf interval at high Q and high overshoot.
if (cm->current_video_frame > 30 &&
rc->avg_frame_qindex[INTER_FRAME] > (7 * rc->worst_quality) >> 3 &&
rc->avg_intersize_gfint > (5 * rc->avg_frame_bandwidth) >> 1) {
rc->baseline_gf_interval = (3 * rc->baseline_gf_interval) >> 1;
} else if (cm->current_video_frame > 30 &&
rc->avg_frame_low_motion < 20) {
// Decrease boost and gf interval for high motion case.
rc->gfu_boost = DEFAULT_GF_BOOST >> 1;
rc->baseline_gf_interval = VPXMIN(6, rc->baseline_gf_interval >> 1);
}
// Increase gf interval at high Q and high overshoot.
if (cm->current_video_frame > 30 &&
rc->avg_frame_qindex[INTER_FRAME] > (7 * rc->worst_quality) >> 3 &&
rc->avg_intersize_gfint > (5 * rc->avg_frame_bandwidth) >> 1) {
rc->baseline_gf_interval = (3 * rc->baseline_gf_interval) >> 1;
} else if (cm->current_video_frame > 30 &&
rc->avg_frame_low_motion < 20) {
// Decrease boost and gf interval for high motion case.
rc->gfu_boost = DEFAULT_GF_BOOST >> 1;
rc->baseline_gf_interval = VPXMIN(6, rc->baseline_gf_interval >> 1);
}
adjust_gf_key_frame(cpi);
rc->frames_till_gf_update_due = rc->baseline_gf_interval;
// NOTE: frames_till_gf_update_due must be <= frames_to_key.
if (rc->frames_till_gf_update_due > rc->frames_to_key) {
rc->frames_till_gf_update_due = rc->frames_to_key;
rc->constrained_gf_group = 1;
} else {
rc->constrained_gf_group = 0;
}
cpi->refresh_golden_frame = 1;
rc->source_alt_ref_pending = USE_ALTREF_FOR_ONE_PASS;
rc->avg_intersize_gfint = 0;
@ -2152,9 +2156,8 @@ void vp9_avg_source_sad(VP9_COMP *cpi) {
rc->gfu_boost = DEFAULT_GF_BOOST >> 1;
rc->baseline_gf_interval = VPXMIN(20,
VPXMAX(10, rc->baseline_gf_interval));
adjust_gf_key_frame(cpi);
rc->frames_till_gf_update_due = rc->baseline_gf_interval;
if (rc->frames_till_gf_update_due > rc->frames_to_key)
rc->frames_till_gf_update_due = rc->frames_to_key;
target = calc_pframe_target_size_one_pass_vbr(cpi);
vp9_rc_set_frame_target(cpi, target);
rc->count_last_scene_change = 0;