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Fix rate allocation bug.

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Fix miss alignment of the frames contributing to the
error score and bit allocation for gf/arf groups.

Initial results slightly +.

Change-Id: Ie508bdcfdac52e592d48e1f13e01b3551b523deb
This commit is contained in:
Paul Wilkins 2014-01-06 17:05:47 +00:00
parent d7663edeba
commit d7b49b28e6
1 changed files with 15 additions and 25 deletions
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40
vp9/encoder/vp9_firstpass.c
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@ -1568,10 +1568,9 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
// the GF frame error if we code a normal gf
gf_first_frame_err = mod_frame_err;
// Special treatment if the current frame is a key frame (which is also
// a gf). If it is then its error score (and hence bit allocation) need
// to be subtracted out from the calculation for the GF group
if (cpi->common.frame_type == KEY_FRAME)
// If this is a key frame or the overlay from a previous arf then
// The error score / cost of this frame has already been accounted for.
if (cpi->common.frame_type == KEY_FRAME || cpi->rc.source_alt_ref_active)
gf_group_err -= gf_first_frame_err;
// Motion breakout threshold for loop below depends on image size.
@ -1585,14 +1584,14 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
// interval to spread the cost of the GF.
//
active_max_gf_interval =
11 + ((int)vp9_convert_qindex_to_q(cpi->rc.last_q[INTER_FRAME]) >> 5);
12 + ((int)vp9_convert_qindex_to_q(cpi->rc.last_q[INTER_FRAME]) >> 5);
if (active_max_gf_interval > cpi->rc.max_gf_interval)
active_max_gf_interval = cpi->rc.max_gf_interval;
i = 0;
while ((i < cpi->twopass.static_scene_max_gf_interval) &&
(i < (cpi->rc.frames_to_key - 1))) {
(i < cpi->rc.frames_to_key)) {
i++; // Increment the loop counter
// Accumulate error score of frames in this gf group
@ -1665,7 +1664,7 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
// Don't allow a gf too near the next kf
if ((cpi->rc.frames_to_key - i) < MIN_GF_INTERVAL) {
while (i < (cpi->rc.frames_to_key - 1)) {
while (i < cpi->rc.frames_to_key) {
i++;
if (EOF == input_stats(cpi, this_frame))
@ -1678,9 +1677,6 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
}
}
// Set the interval until the next gf or arf.
cpi->rc.baseline_gf_interval = i;
#if CONFIG_MULTIPLE_ARF
if (cpi->multi_arf_enabled) {
// Initialize frame coding order variables.
@ -1693,6 +1689,12 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
}
#endif
// Set the interval until the next gf.
if (cpi->common.frame_type == KEY_FRAME || cpi->rc.source_alt_ref_active)
cpi->rc.baseline_gf_interval = i - 1;
else
cpi->rc.baseline_gf_interval = i;
// Should we use the alternate reference frame
if (allow_alt_ref &&
(i < cpi->oxcf.lag_in_frames) &&
@ -1702,6 +1704,7 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
((mv_in_out_accumulator / (double)i > -0.2) ||
(mv_in_out_accumulator > -2.0)) &&
(boost_score > 100)) {
// Alternative boost calculation for alt ref
cpi->rc.gfu_boost = calc_arf_boost(cpi, 0, (i - 1), (i - 1), &f_boost,
&b_boost);
@ -1885,6 +1888,8 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
// If this is an arf update we want to remove the score for the
// overlay frame at the end which will usually be very cheap to code.
// The overlay frame has already in effect been coded so we want to spread
// the remaining bits amoung the other frames/
// For normal GFs remove the score for the GF itself unless this is
// also a key frame in which case it has already been accounted for.
if (cpi->rc.source_alt_ref_pending) {
@ -2110,21 +2115,6 @@ void vp9_get_second_pass_params(VP9_COMP *cpi) {
cpi->enable_encode_breakout = 2;
}
// If we are going to code an altref frame at the end of the group
// and the current frame is not a key frame....
// If the previous group used an arf this frame has already benefited
// from that arf boost and it should not be given extra bits
// If the previous group was NOT coded using arf we may want to apply
// some boost to this GF as well
if (cpi->rc.source_alt_ref_pending &&
cpi->common.frame_type != KEY_FRAME) {
// Assign a standard frames worth of bits from those allocated
// to the GF group
int bak = cpi->rc.per_frame_bandwidth;
this_frame_copy = this_frame;
assign_std_frame_bits(cpi, &this_frame_copy);
cpi->rc.per_frame_bandwidth = bak;
}
cpi->rc.frames_till_gf_update_due = cpi->rc.baseline_gf_interval;
cpi->refresh_golden_frame = 1;
} else {