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Merge "Allow mode search breakout at very low prediction errors"

This commit is contained in:
Yunqing Wang 2014-10-08 19:58:18 -07:00 коммит произвёл Gerrit Code Review
Родитель 41cea46154 e18edd5eb6
Коммит 189566db58
4 изменённых файлов: 52 добавлений и 129 удалений
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12
vp9/encoder/vp9_firstpass.c
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@ -1815,8 +1815,6 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
old_boost_score = boost_score;
}
twopass->gf_zeromotion_pct = (int)(zero_motion_accumulator * 1000.0);
// Set the interval until the next gf.
if (cpi->common.frame_type == KEY_FRAME || rc->source_alt_ref_active)
rc->baseline_gf_interval = i - 1;
@ -2398,16 +2396,6 @@ void vp9_rc_get_second_pass_params(VP9_COMP *cpi) {
if (rc->frames_till_gf_update_due == 0) {
define_gf_group(cpi, &this_frame_copy);
if (twopass->gf_zeromotion_pct > 995) {
// As long as max_thresh for encode breakout is small enough, it is ok
// to enable it for show frame, i.e. set allow_encode_breakout to
// ENCODE_BREAKOUT_LIMITED.
if (!cm->show_frame)
cpi->allow_encode_breakout = ENCODE_BREAKOUT_DISABLED;
else
cpi->allow_encode_breakout = ENCODE_BREAKOUT_LIMITED;
}
rc->frames_till_gf_update_due = rc->baseline_gf_interval;
if (lc != NULL)
cpi->refresh_golden_frame = 1;

2
vp9/encoder/vp9_firstpass.h
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@ -109,8 +109,6 @@ typedef struct {
int kf_zeromotion_pct;
int last_kfgroup_zeromotion_pct;
int gf_zeromotion_pct;
int active_worst_quality;
GF_GROUP gf_group;

166
vp9/encoder/vp9_rdopt.c
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@ -169,7 +169,8 @@ static void swap_block_ptr(MACROBLOCK *x, PICK_MODE_CONTEXT *ctx,
static void model_rd_for_sb(VP9_COMP *cpi, BLOCK_SIZE bsize,
MACROBLOCK *x, MACROBLOCKD *xd,
int *out_rate_sum, int64_t *out_dist_sum) {
int *out_rate_sum, int64_t *out_dist_sum,
int *skip_txfm_sb, int64_t *skip_sse_sb) {
// Note our transform coeffs are 8 times an orthogonal transform.
// Hence quantizer step is also 8 times. To get effective quantizer
// we need to divide by 8 before sending to modeling function.
@ -180,6 +181,8 @@ static void model_rd_for_sb(VP9_COMP *cpi, BLOCK_SIZE bsize,
unsigned int sse;
unsigned int var = 0;
unsigned int sum_sse = 0;
int64_t total_sse = 0;
int skip_flag = 1;
const int shift = 6;
int rate;
int64_t dist;
@ -192,6 +195,12 @@ static void model_rd_for_sb(VP9_COMP *cpi, BLOCK_SIZE bsize,
const BLOCK_SIZE bs = get_plane_block_size(bsize, pd);
const TX_SIZE max_tx_size = max_txsize_lookup[bs];
const BLOCK_SIZE unit_size = txsize_to_bsize[max_tx_size];
const int64_t dc_thr = p->quant_thred[0] >> shift;
const int64_t ac_thr = p->quant_thred[1] >> shift;
// The low thresholds are used to measure if the prediction errors are
// low enough so that we can skip the mode search.
const int64_t low_dc_thr = MIN(50, dc_thr >> 2);
const int64_t low_ac_thr = MIN(80, ac_thr >> 2);
int bw = 1 << (b_width_log2_lookup[bs] - b_width_log2_lookup[unit_size]);
int bh = 1 << (b_height_log2_lookup[bs] - b_width_log2_lookup[unit_size]);
int idx, idy;
@ -205,6 +214,7 @@ static void model_rd_for_sb(VP9_COMP *cpi, BLOCK_SIZE bsize,
uint8_t *src = p->src.buf + (idy * p->src.stride << lh) + (idx << lw);
uint8_t *dst = pd->dst.buf + (idy * pd->dst.stride << lh) + (idx << lh);
int block_idx = (idy << 1) + idx;
int low_err_skip = 0;
var = cpi->fn_ptr[unit_size].vf(src, p->src.stride,
dst, pd->dst.stride, &sse);
@ -214,20 +224,29 @@ static void model_rd_for_sb(VP9_COMP *cpi, BLOCK_SIZE bsize,
x->skip_txfm[(i << 2) + block_idx] = 0;
if (!x->select_tx_size) {
// Check if all ac coefficients can be quantized to zero.
if (var < p->quant_thred[1] >> shift) {
if (var < ac_thr || var == 0) {
x->skip_txfm[(i << 2) + block_idx] = 2;
// Check if dc coefficient can be quantized to zero.
if (sse - var < p->quant_thred[0] >> shift)
if (sse - var < dc_thr || sse == var) {
x->skip_txfm[(i << 2) + block_idx] = 1;
if (!sse || (var < low_ac_thr && sse - var < low_dc_thr))
low_err_skip = 1;
}
}
}
if (skip_flag && !low_err_skip)
skip_flag = 0;
if (i == 0)
x->pred_sse[ref] += sse;
}
}
total_sse += sum_sse;
// Fast approximate the modelling function.
if (cpi->oxcf.speed > 4) {
int64_t rate;
@ -265,6 +284,8 @@ static void model_rd_for_sb(VP9_COMP *cpi, BLOCK_SIZE bsize,
}
}
*skip_txfm_sb = skip_flag;
*skip_sse_sb = total_sse << 4;
*out_rate_sum = (int)rate_sum;
*out_dist_sum = dist_sum << 4;
}
@ -2337,107 +2358,12 @@ static INLINE void restore_dst_buf(MACROBLOCKD *xd,
}
}
static void rd_encode_breakout_test(VP9_COMP *cpi, MACROBLOCK *x,
BLOCK_SIZE bsize, int *rate2,
int64_t *distortion, int64_t *distortion_uv,
int *disable_skip) {
VP9_COMMON *cm = &cpi->common;
MACROBLOCKD *xd = &x->e_mbd;
const BLOCK_SIZE y_size = get_plane_block_size(bsize, &xd->plane[0]);
const BLOCK_SIZE uv_size = get_plane_block_size(bsize, &xd->plane[1]);
unsigned int var, sse;
// Skipping threshold for ac.
unsigned int thresh_ac;
// Skipping threshold for dc
unsigned int thresh_dc;
var = cpi->fn_ptr[y_size].vf(x->plane[0].src.buf, x->plane[0].src.stride,
xd->plane[0].dst.buf,
xd->plane[0].dst.stride, &sse);
if (x->encode_breakout > 0) {
// Set a maximum for threshold to avoid big PSNR loss in low bitrate
// case. Use extreme low threshold for static frames to limit skipping.
const unsigned int max_thresh = (cpi->allow_encode_breakout ==
ENCODE_BREAKOUT_LIMITED) ? 128 : 36000;
// The encode_breakout input
const unsigned int min_thresh =
MIN(((unsigned int)x->encode_breakout << 4), max_thresh);
// Calculate threshold according to dequant value.
thresh_ac = (xd->plane[0].dequant[1] * xd->plane[0].dequant[1]) / 9;
#if CONFIG_VP9_HIGHBITDEPTH
if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
const int shift = 2 * xd->bd - 16;
if (shift > 0)
thresh_ac = ROUND_POWER_OF_TWO(thresh_ac, shift);
}
#endif // CONFIG_VP9_HIGHBITDEPTH
thresh_ac = clamp(thresh_ac, min_thresh, max_thresh);
// Adjust threshold according to partition size.
thresh_ac >>= 8 - (b_width_log2_lookup[bsize] +
b_height_log2_lookup[bsize]);
thresh_dc = (xd->plane[0].dequant[0] * xd->plane[0].dequant[0] >> 6);
#if CONFIG_VP9_HIGHBITDEPTH
if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
const int shift = 2 * xd->bd - 16;
if (shift > 0)
thresh_dc = ROUND_POWER_OF_TWO(thresh_dc, shift);
}
#endif // CONFIG_VP9_HIGHBITDEPTH
} else {
thresh_ac = 0;
thresh_dc = 0;
}
// Y skipping condition checking
if (sse < thresh_ac || sse == 0) {
// dc skipping checking
if ((sse - var) < thresh_dc || sse == var) {
unsigned int sse_u, sse_v;
unsigned int var_u, var_v;
var_u = cpi->fn_ptr[uv_size].vf(x->plane[1].src.buf,
x->plane[1].src.stride,
xd->plane[1].dst.buf,
xd->plane[1].dst.stride, &sse_u);
// U skipping condition checking
if ((sse_u * 4 < thresh_ac || sse_u == 0) &&
(sse_u - var_u < thresh_dc || sse_u == var_u)) {
var_v = cpi->fn_ptr[uv_size].vf(x->plane[2].src.buf,
x->plane[2].src.stride,
xd->plane[2].dst.buf,
xd->plane[2].dst.stride, &sse_v);
// V skipping condition checking
if ((sse_v * 4 < thresh_ac || sse_v == 0) &&
(sse_v - var_v < thresh_dc || sse_v == var_v)) {
x->skip = 1;
// The cost of skip bit needs to be added.
*rate2 += vp9_cost_bit(vp9_get_skip_prob(cm, xd), 1);
// Scaling factor for SSE from spatial domain to frequency domain
// is 16. Adjust distortion accordingly.
*distortion_uv = (sse_u + sse_v) << 4;
*distortion = (sse << 4) + *distortion_uv;
*disable_skip = 1;
}
}
}
}
}
static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
BLOCK_SIZE bsize,
int64_t txfm_cache[],
int *rate2, int64_t *distortion,
int *skippable,
int *rate_y, int64_t *distortion_y,
int *rate_uv, int64_t *distortion_uv,
int *rate_y, int *rate_uv,
int *disable_skip,
int_mv (*mode_mv)[MAX_REF_FRAMES],
int mi_row, int mi_col,
@ -2480,6 +2406,10 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
(((mi_row + mi_col) >> bsl) +
get_chessboard_index(cm->current_video_frame)) & 0x1 : 0;
int skip_txfm_sb = 0;
int64_t skip_sse_sb = INT64_MAX;
int64_t distortion_y = 0, distortion_uv = 0;
#if CONFIG_VP9_HIGHBITDEPTH
if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
tmp_buf = CONVERT_TO_BYTEPTR(tmp_buf16);
@ -2597,6 +2527,9 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
for (i = 0; i < SWITCHABLE_FILTERS; ++i) {
int j;
int64_t rs_rd;
int tmp_skip_sb = 0;
int64_t tmp_skip_sse = INT64_MAX;
mbmi->interp_filter = i;
rs = vp9_get_switchable_rate(cpi);
rs_rd = RDCOST(x->rdmult, x->rddiv, rs, 0);
@ -2632,7 +2565,8 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
}
}
vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
model_rd_for_sb(cpi, bsize, x, xd, &rate_sum, &dist_sum);
model_rd_for_sb(cpi, bsize, x, xd, &rate_sum, &dist_sum,
&tmp_skip_sb, &tmp_skip_sse);
rd = RDCOST(x->rdmult, x->rddiv, rate_sum, dist_sum);
rd_opt->filter_cache[i] = rd;
@ -2669,6 +2603,8 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
pred_exists = 1;
tmp_rd = best_rd;
skip_txfm_sb = tmp_skip_sb;
skip_sse_sb = tmp_skip_sse;
vpx_memcpy(skip_txfm, x->skip_txfm, sizeof(skip_txfm));
vpx_memcpy(bsse, x->bsse, sizeof(bsse));
}
@ -2697,7 +2633,8 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
// switchable list (ex. bilinear) is indicated at the frame level, or
// skip condition holds.
vp9_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);
model_rd_for_sb(cpi, bsize, x, xd, &tmp_rate, &tmp_dist);
model_rd_for_sb(cpi, bsize, x, xd, &tmp_rate, &tmp_dist,
&skip_txfm_sb, &skip_sse_sb);
rd = RDCOST(x->rdmult, x->rddiv, rs + tmp_rate, tmp_dist);
vpx_memcpy(skip_txfm, x->skip_txfm, sizeof(skip_txfm));
vpx_memcpy(bsse, x->bsse, sizeof(bsse));
@ -2724,23 +2661,17 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
if (cm->interp_filter == SWITCHABLE)
*rate2 += rs;
if (!is_comp_pred) {
if (cpi->allow_encode_breakout)
rd_encode_breakout_test(cpi, x, bsize, rate2, distortion, distortion_uv,
disable_skip);
}
vpx_memcpy(x->skip_txfm, skip_txfm, sizeof(skip_txfm));
vpx_memcpy(x->bsse, bsse, sizeof(bsse));
if (!x->skip) {
if (!skip_txfm_sb) {
int skippable_y, skippable_uv;
int64_t sseuv = INT64_MAX;
int64_t rdcosty = INT64_MAX;
// Y cost and distortion
vp9_subtract_plane(x, bsize, 0);
super_block_yrd(cpi, x, rate_y, distortion_y, &skippable_y, psse,
super_block_yrd(cpi, x, rate_y, &distortion_y, &skippable_y, psse,
bsize, txfm_cache, ref_best_rd);
if (*rate_y == INT_MAX) {
@ -2751,12 +2682,12 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
}
*rate2 += *rate_y;
*distortion += *distortion_y;
*distortion += distortion_y;
rdcosty = RDCOST(x->rdmult, x->rddiv, *rate2, *distortion);
rdcosty = MIN(rdcosty, RDCOST(x->rdmult, x->rddiv, 0, *psse));
super_block_uvrd(cpi, x, rate_uv, distortion_uv, &skippable_uv, &sseuv,
super_block_uvrd(cpi, x, rate_uv, &distortion_uv, &skippable_uv, &sseuv,
bsize, ref_best_rd - rdcosty);
if (*rate_uv == INT_MAX) {
*rate2 = INT_MAX;
@ -2767,8 +2698,16 @@ static int64_t handle_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
*psse += sseuv;
*rate2 += *rate_uv;
*distortion += *distortion_uv;
*distortion += distortion_uv;
*skippable = skippable_y && skippable_uv;
} else {
x->skip = 1;
*disable_skip = 1;
// The cost of skip bit needs to be added.
*rate2 += vp9_cost_bit(vp9_get_skip_prob(cm, xd), 1);
*distortion = skip_sse_sb;
}
if (!is_comp_pred)
@ -3252,8 +3191,7 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
this_rd = handle_inter_mode(cpi, x, bsize,
tx_cache,
&rate2, &distortion2, &skippable,
&rate_y, &distortion_y,
&rate_uv, &distortion_uv,
&rate_y, &rate_uv,
&disable_skip, frame_mv,
mi_row, mi_col,
single_newmv, single_inter_filter,

1
vp9/encoder/vp9_speed_features.c
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@ -151,7 +151,6 @@ static void set_good_speed_feature(VP9_COMP *cpi, VP9_COMMON *cm,
sf->intra_y_mode_mask[i] = INTRA_DC;
sf->intra_uv_mode_mask[i] = INTRA_DC;
}
cpi->allow_encode_breakout = ENCODE_BREAKOUT_ENABLED;
}
if (speed >= 6) {
sf->mv.reduce_first_step_size = 1;