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Diffstat (limited to 'vp10/encoder/firstpass.c')
| -rw-r--r-- | vp10/encoder/firstpass.c | 2665 |
1 files changed, 0 insertions, 2665 deletions
diff --git a/vp10/encoder/firstpass.c b/vp10/encoder/firstpass.c deleted file mode 100644 index c41fa3e39..000000000 --- a/vp10/encoder/firstpass.c +++ /dev/null @@ -1,2665 +0,0 @@ -/* - * Copyright (c) 2010 The WebM project authors. All Rights Reserved. - * - * Use of this source code is governed by a BSD-style license - * that can be found in the LICENSE file in the root of the source - * tree. An additional intellectual property rights grant can be found - * in the file PATENTS. All contributing project authors may - * be found in the AUTHORS file in the root of the source tree. - */ - -#include <limits.h> -#include <math.h> -#include <stdio.h> - -#include "./vpx_dsp_rtcd.h" -#include "./vpx_scale_rtcd.h" - -#include "vpx_dsp/vpx_dsp_common.h" -#include "vpx_mem/vpx_mem.h" -#include "vpx_ports/mem.h" -#include "vpx_ports/system_state.h" -#include "vpx_scale/vpx_scale.h" -#include "vpx_scale/yv12config.h" - -#include "vp10/common/entropymv.h" -#include "vp10/common/quant_common.h" -#include "vp10/common/reconinter.h" // vp10_setup_dst_planes() -#include "vp10/encoder/aq_variance.h" -#include "vp10/encoder/block.h" -#include "vp10/encoder/encodeframe.h" -#include "vp10/encoder/encodemb.h" -#include "vp10/encoder/encodemv.h" -#include "vp10/encoder/encoder.h" -#include "vp10/encoder/extend.h" -#include "vp10/encoder/firstpass.h" -#include "vp10/encoder/mcomp.h" -#include "vp10/encoder/quantize.h" -#include "vp10/encoder/rd.h" -#include "vpx_dsp/variance.h" - -#define OUTPUT_FPF 0 -#define ARF_STATS_OUTPUT 0 - -#define GROUP_ADAPTIVE_MAXQ 1 - -#define BOOST_BREAKOUT 12.5 -#define BOOST_FACTOR 12.5 -#define ERR_DIVISOR 128.0 -#define FACTOR_PT_LOW 0.70 -#define FACTOR_PT_HIGH 0.90 -#define FIRST_PASS_Q 10.0 -#define GF_MAX_BOOST 96.0 -#define INTRA_MODE_PENALTY 1024 -#define KF_MAX_BOOST 128.0 -#define MIN_ARF_GF_BOOST 240 -#define MIN_DECAY_FACTOR 0.01 -#define MIN_KF_BOOST 300 -#define NEW_MV_MODE_PENALTY 32 -#define DARK_THRESH 64 -#define DEFAULT_GRP_WEIGHT 1.0 -#define RC_FACTOR_MIN 0.75 -#define RC_FACTOR_MAX 1.75 - - -#define NCOUNT_INTRA_THRESH 8192 -#define NCOUNT_INTRA_FACTOR 3 -#define NCOUNT_FRAME_II_THRESH 5.0 - -#define DOUBLE_DIVIDE_CHECK(x) ((x) < 0 ? (x) - 0.000001 : (x) + 0.000001) - -#if ARF_STATS_OUTPUT -unsigned int arf_count = 0; -#endif - -// Resets the first pass file to the given position using a relative seek from -// the current position. -static void reset_fpf_position(TWO_PASS *p, - const FIRSTPASS_STATS *position) { - p->stats_in = position; -} - -// Read frame stats at an offset from the current position. -static const FIRSTPASS_STATS *read_frame_stats(const TWO_PASS *p, int offset) { - if ((offset >= 0 && p->stats_in + offset >= p->stats_in_end) || - (offset < 0 && p->stats_in + offset < p->stats_in_start)) { - return NULL; - } - - return &p->stats_in[offset]; -} - -static int input_stats(TWO_PASS *p, FIRSTPASS_STATS *fps) { - if (p->stats_in >= p->stats_in_end) - return EOF; - - *fps = *p->stats_in; - ++p->stats_in; - return 1; -} - -static void output_stats(FIRSTPASS_STATS *stats, - struct vpx_codec_pkt_list *pktlist) { - struct vpx_codec_cx_pkt pkt; - pkt.kind = VPX_CODEC_STATS_PKT; - pkt.data.twopass_stats.buf = stats; - pkt.data.twopass_stats.sz = sizeof(FIRSTPASS_STATS); - vpx_codec_pkt_list_add(pktlist, &pkt); - -// TEMP debug code -#if OUTPUT_FPF - { - FILE *fpfile; - fpfile = fopen("firstpass.stt", "a"); - - fprintf(fpfile, "%12.0lf %12.4lf %12.0lf %12.0lf %12.0lf %12.4lf %12.4lf" - "%12.4lf %12.4lf %12.4lf %12.4lf %12.4lf %12.4lf %12.4lf %12.4lf" - "%12.4lf %12.4lf %12.0lf %12.0lf %12.0lf %12.4lf\n", - stats->frame, - stats->weight, - stats->intra_error, - stats->coded_error, - stats->sr_coded_error, - stats->pcnt_inter, - stats->pcnt_motion, - stats->pcnt_second_ref, - stats->pcnt_neutral, - stats->intra_skip_pct, - stats->inactive_zone_rows, - stats->inactive_zone_cols, - stats->MVr, - stats->mvr_abs, - stats->MVc, - stats->mvc_abs, - stats->MVrv, - stats->MVcv, - stats->mv_in_out_count, - stats->new_mv_count, - stats->count, - stats->duration); - fclose(fpfile); - } -#endif -} - -#if CONFIG_FP_MB_STATS -static void output_fpmb_stats(uint8_t *this_frame_mb_stats, - VP10_COMMON *cm, - struct vpx_codec_pkt_list *pktlist) { - struct vpx_codec_cx_pkt pkt; - pkt.kind = VPX_CODEC_FPMB_STATS_PKT; - pkt.data.firstpass_mb_stats.buf = this_frame_mb_stats; - pkt.data.firstpass_mb_stats.sz = cm->initial_mbs * sizeof(uint8_t); - vpx_codec_pkt_list_add(pktlist, &pkt); -} -#endif - -static void zero_stats(FIRSTPASS_STATS *section) { - section->frame = 0.0; - section->weight = 0.0; - section->intra_error = 0.0; - section->coded_error = 0.0; - section->sr_coded_error = 0.0; - section->pcnt_inter = 0.0; - section->pcnt_motion = 0.0; - section->pcnt_second_ref = 0.0; - section->pcnt_neutral = 0.0; - section->intra_skip_pct = 0.0; - section->inactive_zone_rows = 0.0; - section->inactive_zone_cols = 0.0; - section->MVr = 0.0; - section->mvr_abs = 0.0; - section->MVc = 0.0; - section->mvc_abs = 0.0; - section->MVrv = 0.0; - section->MVcv = 0.0; - section->mv_in_out_count = 0.0; - section->new_mv_count = 0.0; - section->count = 0.0; - section->duration = 1.0; -} - -static void accumulate_stats(FIRSTPASS_STATS *section, - const FIRSTPASS_STATS *frame) { - section->frame += frame->frame; - section->weight += frame->weight; - section->intra_error += frame->intra_error; - section->coded_error += frame->coded_error; - section->sr_coded_error += frame->sr_coded_error; - section->pcnt_inter += frame->pcnt_inter; - section->pcnt_motion += frame->pcnt_motion; - section->pcnt_second_ref += frame->pcnt_second_ref; - section->pcnt_neutral += frame->pcnt_neutral; - section->intra_skip_pct += frame->intra_skip_pct; - section->inactive_zone_rows += frame->inactive_zone_rows; - section->inactive_zone_cols += frame->inactive_zone_cols; - section->MVr += frame->MVr; - section->mvr_abs += frame->mvr_abs; - section->MVc += frame->MVc; - section->mvc_abs += frame->mvc_abs; - section->MVrv += frame->MVrv; - section->MVcv += frame->MVcv; - section->mv_in_out_count += frame->mv_in_out_count; - section->new_mv_count += frame->new_mv_count; - section->count += frame->count; - section->duration += frame->duration; -} - -static void subtract_stats(FIRSTPASS_STATS *section, - const FIRSTPASS_STATS *frame) { - section->frame -= frame->frame; - section->weight -= frame->weight; - section->intra_error -= frame->intra_error; - section->coded_error -= frame->coded_error; - section->sr_coded_error -= frame->sr_coded_error; - section->pcnt_inter -= frame->pcnt_inter; - section->pcnt_motion -= frame->pcnt_motion; - section->pcnt_second_ref -= frame->pcnt_second_ref; - section->pcnt_neutral -= frame->pcnt_neutral; - section->intra_skip_pct -= frame->intra_skip_pct; - section->inactive_zone_rows -= frame->inactive_zone_rows; - section->inactive_zone_cols -= frame->inactive_zone_cols; - section->MVr -= frame->MVr; - section->mvr_abs -= frame->mvr_abs; - section->MVc -= frame->MVc; - section->mvc_abs -= frame->mvc_abs; - section->MVrv -= frame->MVrv; - section->MVcv -= frame->MVcv; - section->mv_in_out_count -= frame->mv_in_out_count; - section->new_mv_count -= frame->new_mv_count; - section->count -= frame->count; - section->duration -= frame->duration; -} - -// Calculate an active area of the image that discounts formatting -// bars and partially discounts other 0 energy areas. -#define MIN_ACTIVE_AREA 0.5 -#define MAX_ACTIVE_AREA 1.0 -static double calculate_active_area(const VP10_COMP *cpi, - const FIRSTPASS_STATS *this_frame) -{ - double active_pct; - - active_pct = 1.0 - - ((this_frame->intra_skip_pct / 2) + - ((this_frame->inactive_zone_rows * 2) / (double)cpi->common.mb_rows)); - return fclamp(active_pct, MIN_ACTIVE_AREA, MAX_ACTIVE_AREA); -} - -// Calculate a modified Error used in distributing bits between easier and -// harder frames. -#define ACT_AREA_CORRECTION 0.5 -static double calculate_modified_err(const VP10_COMP *cpi, - const TWO_PASS *twopass, - const VP10EncoderConfig *oxcf, - const FIRSTPASS_STATS *this_frame) { - const FIRSTPASS_STATS *const stats = &twopass->total_stats; - const double av_weight = stats->weight / stats->count; - const double av_err = (stats->coded_error * av_weight) / stats->count; - double modified_error = - av_err * pow(this_frame->coded_error * this_frame->weight / - DOUBLE_DIVIDE_CHECK(av_err), oxcf->two_pass_vbrbias / 100.0); - - // Correction for active area. Frames with a reduced active area - // (eg due to formatting bars) have a higher error per mb for the - // remaining active MBs. The correction here assumes that coding - // 0.5N blocks of complexity 2X is a little easier than coding N - // blocks of complexity X. - modified_error *= - pow(calculate_active_area(cpi, this_frame), ACT_AREA_CORRECTION); - - return fclamp(modified_error, - twopass->modified_error_min, twopass->modified_error_max); -} - -// This function returns the maximum target rate per frame. -static int frame_max_bits(const RATE_CONTROL *rc, - const VP10EncoderConfig *oxcf) { - int64_t max_bits = ((int64_t)rc->avg_frame_bandwidth * - (int64_t)oxcf->two_pass_vbrmax_section) / 100; - if (max_bits < 0) - max_bits = 0; - else if (max_bits > rc->max_frame_bandwidth) - max_bits = rc->max_frame_bandwidth; - - return (int)max_bits; -} - -void vp10_init_first_pass(VP10_COMP *cpi) { - zero_stats(&cpi->twopass.total_stats); -} - -void vp10_end_first_pass(VP10_COMP *cpi) { - output_stats(&cpi->twopass.total_stats, cpi->output_pkt_list); -} - -static vpx_variance_fn_t get_block_variance_fn(BLOCK_SIZE bsize) { - switch (bsize) { - case BLOCK_8X8: - return vpx_mse8x8; - case BLOCK_16X8: - return vpx_mse16x8; - case BLOCK_8X16: - return vpx_mse8x16; - default: - return vpx_mse16x16; - } -} - -static unsigned int get_prediction_error(BLOCK_SIZE bsize, - const struct buf_2d *src, - const struct buf_2d *ref) { - unsigned int sse; - const vpx_variance_fn_t fn = get_block_variance_fn(bsize); - fn(src->buf, src->stride, ref->buf, ref->stride, &sse); - return sse; -} - -#if CONFIG_VP9_HIGHBITDEPTH -static vpx_variance_fn_t highbd_get_block_variance_fn(BLOCK_SIZE bsize, - int bd) { - switch (bd) { - default: - switch (bsize) { - case BLOCK_8X8: - return vpx_highbd_8_mse8x8; - case BLOCK_16X8: - return vpx_highbd_8_mse16x8; - case BLOCK_8X16: - return vpx_highbd_8_mse8x16; - default: - return vpx_highbd_8_mse16x16; - } - break; - case 10: - switch (bsize) { - case BLOCK_8X8: - return vpx_highbd_10_mse8x8; - case BLOCK_16X8: - return vpx_highbd_10_mse16x8; - case BLOCK_8X16: - return vpx_highbd_10_mse8x16; - default: - return vpx_highbd_10_mse16x16; - } - break; - case 12: - switch (bsize) { - case BLOCK_8X8: - return vpx_highbd_12_mse8x8; - case BLOCK_16X8: - return vpx_highbd_12_mse16x8; - case BLOCK_8X16: - return vpx_highbd_12_mse8x16; - default: - return vpx_highbd_12_mse16x16; - } - break; - } -} - -static unsigned int highbd_get_prediction_error(BLOCK_SIZE bsize, - const struct buf_2d *src, - const struct buf_2d *ref, - int bd) { - unsigned int sse; - const vpx_variance_fn_t fn = highbd_get_block_variance_fn(bsize, bd); - fn(src->buf, src->stride, ref->buf, ref->stride, &sse); - return sse; -} -#endif // CONFIG_VP9_HIGHBITDEPTH - -// Refine the motion search range according to the frame dimension -// for first pass test. -static int get_search_range(const VP10_COMP *cpi) { - int sr = 0; - const int dim = VPXMIN(cpi->initial_width, cpi->initial_height); - - while ((dim << sr) < MAX_FULL_PEL_VAL) - ++sr; - return sr; -} - -static void first_pass_motion_search(VP10_COMP *cpi, MACROBLOCK *x, - const MV *ref_mv, MV *best_mv, - int *best_motion_err) { - MACROBLOCKD *const xd = &x->e_mbd; - MV tmp_mv = {0, 0}; - MV ref_mv_full = {ref_mv->row >> 3, ref_mv->col >> 3}; - int num00, tmp_err, n; - const BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type; - vp9_variance_fn_ptr_t v_fn_ptr = cpi->fn_ptr[bsize]; - const int new_mv_mode_penalty = NEW_MV_MODE_PENALTY; - - int step_param = 3; - int further_steps = (MAX_MVSEARCH_STEPS - 1) - step_param; - const int sr = get_search_range(cpi); - step_param += sr; - further_steps -= sr; - - // Override the default variance function to use MSE. - v_fn_ptr.vf = get_block_variance_fn(bsize); -#if CONFIG_VP9_HIGHBITDEPTH - if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { - v_fn_ptr.vf = highbd_get_block_variance_fn(bsize, xd->bd); - } -#endif // CONFIG_VP9_HIGHBITDEPTH - - // Center the initial step/diamond search on best mv. - tmp_err = cpi->diamond_search_sad(x, &cpi->ss_cfg, &ref_mv_full, &tmp_mv, - step_param, - x->sadperbit16, &num00, &v_fn_ptr, ref_mv); - if (tmp_err < INT_MAX) - tmp_err = vp10_get_mvpred_var(x, &tmp_mv, ref_mv, &v_fn_ptr, 1); - if (tmp_err < INT_MAX - new_mv_mode_penalty) - tmp_err += new_mv_mode_penalty; - - if (tmp_err < *best_motion_err) { - *best_motion_err = tmp_err; - *best_mv = tmp_mv; - } - - // Carry out further step/diamond searches as necessary. - n = num00; - num00 = 0; - - while (n < further_steps) { - ++n; - - if (num00) { - --num00; - } else { - tmp_err = cpi->diamond_search_sad(x, &cpi->ss_cfg, &ref_mv_full, &tmp_mv, - step_param + n, x->sadperbit16, - &num00, &v_fn_ptr, ref_mv); - if (tmp_err < INT_MAX) - tmp_err = vp10_get_mvpred_var(x, &tmp_mv, ref_mv, &v_fn_ptr, 1); - if (tmp_err < INT_MAX - new_mv_mode_penalty) - tmp_err += new_mv_mode_penalty; - - if (tmp_err < *best_motion_err) { - *best_motion_err = tmp_err; - *best_mv = tmp_mv; - } - } - } -} - -static BLOCK_SIZE get_bsize(const VP10_COMMON *cm, int mb_row, int mb_col) { - if (2 * mb_col + 1 < cm->mi_cols) { - return 2 * mb_row + 1 < cm->mi_rows ? BLOCK_16X16 - : BLOCK_16X8; - } else { - return 2 * mb_row + 1 < cm->mi_rows ? BLOCK_8X16 - : BLOCK_8X8; - } -} - -static int find_fp_qindex(vpx_bit_depth_t bit_depth) { - int i; - - for (i = 0; i < QINDEX_RANGE; ++i) - if (vp10_convert_qindex_to_q(i, bit_depth) >= FIRST_PASS_Q) - break; - - if (i == QINDEX_RANGE) - i--; - - return i; -} - -static void set_first_pass_params(VP10_COMP *cpi) { - VP10_COMMON *const cm = &cpi->common; - if (!cpi->refresh_alt_ref_frame && - (cm->current_video_frame == 0 || - (cpi->frame_flags & FRAMEFLAGS_KEY))) { - cm->frame_type = KEY_FRAME; - } else { - cm->frame_type = INTER_FRAME; - } - // Do not use periodic key frames. - cpi->rc.frames_to_key = INT_MAX; -} - -#define UL_INTRA_THRESH 50 -#define INVALID_ROW -1 -void vp10_first_pass(VP10_COMP *cpi, const struct lookahead_entry *source) { - int mb_row, mb_col; - MACROBLOCK *const x = &cpi->td.mb; - VP10_COMMON *const cm = &cpi->common; - MACROBLOCKD *const xd = &x->e_mbd; - TileInfo tile; - struct macroblock_plane *const p = x->plane; - struct macroblockd_plane *const pd = xd->plane; - const PICK_MODE_CONTEXT *ctx = &cpi->td.pc_root->none; - int i; - - int recon_yoffset, recon_uvoffset; - int64_t intra_error = 0; - int64_t coded_error = 0; - int64_t sr_coded_error = 0; - - int sum_mvr = 0, sum_mvc = 0; - int sum_mvr_abs = 0, sum_mvc_abs = 0; - int64_t sum_mvrs = 0, sum_mvcs = 0; - int mvcount = 0; - int intercount = 0; - int second_ref_count = 0; - const int intrapenalty = INTRA_MODE_PENALTY; - double neutral_count; - int intra_skip_count = 0; - int image_data_start_row = INVALID_ROW; - int new_mv_count = 0; - int sum_in_vectors = 0; - MV lastmv = {0, 0}; - TWO_PASS *twopass = &cpi->twopass; - const MV zero_mv = {0, 0}; - int recon_y_stride, recon_uv_stride, uv_mb_height; - - YV12_BUFFER_CONFIG *const lst_yv12 = get_ref_frame_buffer(cpi, LAST_FRAME); - YV12_BUFFER_CONFIG *gld_yv12 = get_ref_frame_buffer(cpi, GOLDEN_FRAME); - YV12_BUFFER_CONFIG *const new_yv12 = get_frame_new_buffer(cm); - const YV12_BUFFER_CONFIG *first_ref_buf = lst_yv12; - double intra_factor; - double brightness_factor; - BufferPool *const pool = cm->buffer_pool; - - // First pass code requires valid last and new frame buffers. - assert(new_yv12 != NULL); - assert(frame_is_intra_only(cm) || (lst_yv12 != NULL)); - -#if CONFIG_FP_MB_STATS - if (cpi->use_fp_mb_stats) { - vp10_zero_array(cpi->twopass.frame_mb_stats_buf, cm->initial_mbs); - } -#endif - - vpx_clear_system_state(); - - intra_factor = 0.0; - brightness_factor = 0.0; - neutral_count = 0.0; - - set_first_pass_params(cpi); - vp10_set_quantizer(cm, find_fp_qindex(cm->bit_depth)); - - vp10_setup_block_planes(&x->e_mbd, cm->subsampling_x, cm->subsampling_y); - - vp10_setup_src_planes(x, cpi->Source, 0, 0); - vp10_setup_dst_planes(xd->plane, new_yv12, 0, 0); - - if (!frame_is_intra_only(cm)) { - vp10_setup_pre_planes(xd, 0, first_ref_buf, 0, 0, NULL); - } - - xd->mi = cm->mi_grid_visible; - xd->mi[0] = cm->mi; - - vp10_frame_init_quantizer(cpi); - - for (i = 0; i < MAX_MB_PLANE; ++i) { - p[i].coeff = ctx->coeff_pbuf[i][1]; - p[i].qcoeff = ctx->qcoeff_pbuf[i][1]; - pd[i].dqcoeff = ctx->dqcoeff_pbuf[i][1]; - p[i].eobs = ctx->eobs_pbuf[i][1]; - } - x->skip_recode = 0; - - vp10_init_mv_probs(cm); - vp10_initialize_rd_consts(cpi); - - // Tiling is ignored in the first pass. - vp10_tile_init(&tile, cm, 0, 0); - - recon_y_stride = new_yv12->y_stride; - recon_uv_stride = new_yv12->uv_stride; - uv_mb_height = 16 >> (new_yv12->y_height > new_yv12->uv_height); - - for (mb_row = 0; mb_row < cm->mb_rows; ++mb_row) { - MV best_ref_mv = {0, 0}; - - // Reset above block coeffs. - xd->up_available = (mb_row != 0); - recon_yoffset = (mb_row * recon_y_stride * 16); - recon_uvoffset = (mb_row * recon_uv_stride * uv_mb_height); - - // Set up limit values for motion vectors to prevent them extending - // outside the UMV borders. - x->mv_row_min = -((mb_row * 16) + BORDER_MV_PIXELS_B16); - x->mv_row_max = ((cm->mb_rows - 1 - mb_row) * 16) - + BORDER_MV_PIXELS_B16; - - for (mb_col = 0; mb_col < cm->mb_cols; ++mb_col) { - int this_error; - const int use_dc_pred = (mb_col || mb_row) && (!mb_col || !mb_row); - const BLOCK_SIZE bsize = get_bsize(cm, mb_row, mb_col); - double log_intra; - int level_sample; - -#if CONFIG_FP_MB_STATS - const int mb_index = mb_row * cm->mb_cols + mb_col; -#endif - - vpx_clear_system_state(); - - xd->plane[0].dst.buf = new_yv12->y_buffer + recon_yoffset; - xd->plane[1].dst.buf = new_yv12->u_buffer + recon_uvoffset; - xd->plane[2].dst.buf = new_yv12->v_buffer + recon_uvoffset; - xd->left_available = (mb_col != 0); - xd->mi[0]->mbmi.sb_type = bsize; - xd->mi[0]->mbmi.ref_frame[0] = INTRA_FRAME; - set_mi_row_col(xd, &tile, - mb_row << 1, num_8x8_blocks_high_lookup[bsize], - mb_col << 1, num_8x8_blocks_wide_lookup[bsize], - cm->mi_rows, cm->mi_cols); - - // Do intra 16x16 prediction. - xd->mi[0]->mbmi.segment_id = 0; - xd->mi[0]->mbmi.mode = DC_PRED; - xd->mi[0]->mbmi.tx_size = use_dc_pred ? - (bsize >= BLOCK_16X16 ? TX_16X16 : TX_8X8) : TX_4X4; - vp10_encode_intra_block_plane(x, bsize, 0); - this_error = vpx_get_mb_ss(x->plane[0].src_diff); - - // Keep a record of blocks that have almost no intra error residual - // (i.e. are in effect completely flat and untextured in the intra - // domain). In natural videos this is uncommon, but it is much more - // common in animations, graphics and screen content, so may be used - // as a signal to detect these types of content. - if (this_error < UL_INTRA_THRESH) { - ++intra_skip_count; - } else if ((mb_col > 0) && (image_data_start_row == INVALID_ROW)) { - image_data_start_row = mb_row; - } - -#if CONFIG_VP9_HIGHBITDEPTH - if (cm->use_highbitdepth) { - switch (cm->bit_depth) { - case VPX_BITS_8: - break; - case VPX_BITS_10: - this_error >>= 4; - break; - case VPX_BITS_12: - this_error >>= 8; - break; - default: - assert(0 && "cm->bit_depth should be VPX_BITS_8, " - "VPX_BITS_10 or VPX_BITS_12"); - return; - } - } -#endif // CONFIG_VP9_HIGHBITDEPTH - - vpx_clear_system_state(); - log_intra = log(this_error + 1.0); - if (log_intra < 10.0) - intra_factor += 1.0 + ((10.0 - log_intra) * 0.05); - else - intra_factor += 1.0; - -#if CONFIG_VP9_HIGHBITDEPTH - if (cm->use_highbitdepth) - level_sample = CONVERT_TO_SHORTPTR(x->plane[0].src.buf)[0]; - else - level_sample = x->plane[0].src.buf[0]; -#else - level_sample = x->plane[0].src.buf[0]; -#endif - if ((level_sample < DARK_THRESH) && (log_intra < 9.0)) - brightness_factor += 1.0 + (0.01 * (DARK_THRESH - level_sample)); - else - brightness_factor += 1.0; - - // Intrapenalty below deals with situations where the intra and inter - // error scores are very low (e.g. a plain black frame). - // We do not have special cases in first pass for 0,0 and nearest etc so - // all inter modes carry an overhead cost estimate for the mv. - // When the error score is very low this causes us to pick all or lots of - // INTRA modes and throw lots of key frames. - // This penalty adds a cost matching that of a 0,0 mv to the intra case. - this_error += intrapenalty; - - // Accumulate the intra error. - intra_error += (int64_t)this_error; - -#if CONFIG_FP_MB_STATS - if (cpi->use_fp_mb_stats) { - // initialization - cpi->twopass.frame_mb_stats_buf[mb_index] = 0; - } -#endif - - // Set up limit values for motion vectors to prevent them extending - // outside the UMV borders. - x->mv_col_min = -((mb_col * 16) + BORDER_MV_PIXELS_B16); - x->mv_col_max = ((cm->mb_cols - 1 - mb_col) * 16) + BORDER_MV_PIXELS_B16; - - // Other than for the first frame do a motion search. - if (cm->current_video_frame > 0) { - int tmp_err, motion_error, raw_motion_error; - // Assume 0,0 motion with no mv overhead. - MV mv = {0, 0} , tmp_mv = {0, 0}; - struct buf_2d unscaled_last_source_buf_2d; - - xd->plane[0].pre[0].buf = first_ref_buf->y_buffer + recon_yoffset; -#if CONFIG_VP9_HIGHBITDEPTH - if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { - motion_error = highbd_get_prediction_error( - bsize, &x->plane[0].src, &xd->plane[0].pre[0], xd->bd); - } else { - motion_error = get_prediction_error( - bsize, &x->plane[0].src, &xd->plane[0].pre[0]); - } -#else - motion_error = get_prediction_error( - bsize, &x->plane[0].src, &xd->plane[0].pre[0]); -#endif // CONFIG_VP9_HIGHBITDEPTH - - // Compute the motion error of the 0,0 motion using the last source - // frame as the reference. Skip the further motion search on - // reconstructed frame if this error is small. - unscaled_last_source_buf_2d.buf = - cpi->unscaled_last_source->y_buffer + recon_yoffset; - unscaled_last_source_buf_2d.stride = - cpi->unscaled_last_source->y_stride; -#if CONFIG_VP9_HIGHBITDEPTH - if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { - raw_motion_error = highbd_get_prediction_error( - bsize, &x->plane[0].src, &unscaled_last_source_buf_2d, xd->bd); - } else { - raw_motion_error = get_prediction_error( - bsize, &x->plane[0].src, &unscaled_last_source_buf_2d); - } -#else - raw_motion_error = get_prediction_error( - bsize, &x->plane[0].src, &unscaled_last_source_buf_2d); -#endif // CONFIG_VP9_HIGHBITDEPTH - - // TODO(pengchong): Replace the hard-coded threshold - if (raw_motion_error > 25) { - // Test last reference frame using the previous best mv as the - // starting point (best reference) for the search. - first_pass_motion_search(cpi, x, &best_ref_mv, &mv, &motion_error); - - // If the current best reference mv is not centered on 0,0 then do a - // 0,0 based search as well. - if (!is_zero_mv(&best_ref_mv)) { - tmp_err = INT_MAX; - first_pass_motion_search(cpi, x, &zero_mv, &tmp_mv, &tmp_err); - - if (tmp_err < motion_error) { - motion_error = tmp_err; - mv = tmp_mv; - } - } - - // Search in an older reference frame. - if ((cm->current_video_frame > 1) && gld_yv12 != NULL) { - // Assume 0,0 motion with no mv overhead. - int gf_motion_error; - - xd->plane[0].pre[0].buf = gld_yv12->y_buffer + recon_yoffset; -#if CONFIG_VP9_HIGHBITDEPTH - if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { - gf_motion_error = highbd_get_prediction_error( - bsize, &x->plane[0].src, &xd->plane[0].pre[0], xd->bd); - } else { - gf_motion_error = get_prediction_error( - bsize, &x->plane[0].src, &xd->plane[0].pre[0]); - } -#else - gf_motion_error = get_prediction_error( - bsize, &x->plane[0].src, &xd->plane[0].pre[0]); -#endif // CONFIG_VP9_HIGHBITDEPTH - - first_pass_motion_search(cpi, x, &zero_mv, &tmp_mv, - &gf_motion_error); - - if (gf_motion_error < motion_error && gf_motion_error < this_error) - ++second_ref_count; - - // Reset to last frame as reference buffer. - xd->plane[0].pre[0].buf = first_ref_buf->y_buffer + recon_yoffset; - xd->plane[1].pre[0].buf = first_ref_buf->u_buffer + recon_uvoffset; - xd->plane[2].pre[0].buf = first_ref_buf->v_buffer + recon_uvoffset; - - // In accumulating a score for the older reference frame take the - // best of the motion predicted score and the intra coded error - // (just as will be done for) accumulation of "coded_error" for - // the last frame. - if (gf_motion_error < this_error) - sr_coded_error += gf_motion_error; - else - sr_coded_error += this_error; - } else { - sr_coded_error += motion_error; - } - } else { - sr_coded_error += motion_error; - } - - // Start by assuming that intra mode is best. - best_ref_mv.row = 0; - best_ref_mv.col = 0; - -#if CONFIG_FP_MB_STATS - if (cpi->use_fp_mb_stats) { - // intra predication statistics - cpi->twopass.frame_mb_stats_buf[mb_index] = 0; - cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_DCINTRA_MASK; - cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_MOTION_ZERO_MASK; - if (this_error > FPMB_ERROR_LARGE_TH) { - cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_LARGE_MASK; - } else if (this_error < FPMB_ERROR_SMALL_TH) { - cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_ERROR_SMALL_MASK; - } - } -#endif - - if (motion_error <= this_error) { - vpx_clear_system_state(); - - // Keep a count of cases where the inter and intra were very close - // and very low. This helps with scene cut detection for example in - // cropped clips with black bars at the sides or top and bottom. - if (((this_error - intrapenalty) * 9 <= motion_error * 10) && - (this_error < (2 * intrapenalty))) { - neutral_count += 1.0; - // Also track cases where the intra is not much worse than the inter - // and use this in limiting the GF/arf group length. - } else if ((this_error > NCOUNT_INTRA_THRESH) && - (this_error < (NCOUNT_INTRA_FACTOR * motion_error))) { - neutral_count += (double)motion_error / - DOUBLE_DIVIDE_CHECK((double)this_error); - } - - mv.row *= 8; - mv.col *= 8; - this_error = motion_error; - xd->mi[0]->mbmi.mode = NEWMV; - xd->mi[0]->mbmi.mv[0].as_mv = mv; - xd->mi[0]->mbmi.tx_size = TX_4X4; - xd->mi[0]->mbmi.ref_frame[0] = LAST_FRAME; - xd->mi[0]->mbmi.ref_frame[1] = NONE; - vp10_build_inter_predictors_sby(xd, mb_row << 1, mb_col << 1, bsize); - vp10_encode_sby_pass1(x, bsize); - sum_mvr += mv.row; - sum_mvr_abs += abs(mv.row); - sum_mvc += mv.col; - sum_mvc_abs += abs(mv.col); - sum_mvrs += mv.row * mv.row; - sum_mvcs += mv.col * mv.col; - ++intercount; - - best_ref_mv = mv; - -#if CONFIG_FP_MB_STATS - if (cpi->use_fp_mb_stats) { - // inter predication statistics - cpi->twopass.frame_mb_stats_buf[mb_index] = 0; - cpi->twopass.frame_mb_stats_buf[mb_index] &= ~FPMB_DCINTRA_MASK; - cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_MOTION_ZERO_MASK; - if (this_error > FPMB_ERROR_LARGE_TH) { - cpi->twopass.frame_mb_stats_buf[mb_index] |= - FPMB_ERROR_LARGE_MASK; - } else if (this_error < FPMB_ERROR_SMALL_TH) { - cpi->twopass.frame_mb_stats_buf[mb_index] |= - FPMB_ERROR_SMALL_MASK; - } - } -#endif - - if (!is_zero_mv(&mv)) { - ++mvcount; - -#if CONFIG_FP_MB_STATS - if (cpi->use_fp_mb_stats) { - cpi->twopass.frame_mb_stats_buf[mb_index] &= - ~FPMB_MOTION_ZERO_MASK; - // check estimated motion direction - if (mv.as_mv.col > 0 && mv.as_mv.col >= abs(mv.as_mv.row)) { - // right direction - cpi->twopass.frame_mb_stats_buf[mb_index] |= - FPMB_MOTION_RIGHT_MASK; - } else if (mv.as_mv.row < 0 && - abs(mv.as_mv.row) >= abs(mv.as_mv.col)) { - // up direction - cpi->twopass.frame_mb_stats_buf[mb_index] |= - FPMB_MOTION_UP_MASK; - } else if (mv.as_mv.col < 0 && - abs(mv.as_mv.col) >= abs(mv.as_mv.row)) { - // left direction - cpi->twopass.frame_mb_stats_buf[mb_index] |= - FPMB_MOTION_LEFT_MASK; - } else { - // down direction - cpi->twopass.frame_mb_stats_buf[mb_index] |= - FPMB_MOTION_DOWN_MASK; - } - } -#endif - - // Non-zero vector, was it different from the last non zero vector? - if (!is_equal_mv(&mv, &lastmv)) - ++new_mv_count; - lastmv = mv; - - // Does the row vector point inwards or outwards? - if (mb_row < cm->mb_rows / 2) { - if (mv.row > 0) - --sum_in_vectors; - else if (mv.row < 0) - ++sum_in_vectors; - } else if (mb_row > cm->mb_rows / 2) { - if (mv.row > 0) - ++sum_in_vectors; - else if (mv.row < 0) - --sum_in_vectors; - } - - // Does the col vector point inwards or outwards? - if (mb_col < cm->mb_cols / 2) { - if (mv.col > 0) - --sum_in_vectors; - else if (mv.col < 0) - ++sum_in_vectors; - } else if (mb_col > cm->mb_cols / 2) { - if (mv.col > 0) - ++sum_in_vectors; - else if (mv.col < 0) - --sum_in_vectors; - } - } - } - } else { - sr_coded_error += (int64_t)this_error; - } - coded_error += (int64_t)this_error; - - // Adjust to the next column of MBs. - x->plane[0].src.buf += 16; - x->plane[1].src.buf += uv_mb_height; - x->plane[2].src.buf += uv_mb_height; - - recon_yoffset += 16; - recon_uvoffset += uv_mb_height; - } - - // Adjust to the next row of MBs. - x->plane[0].src.buf += 16 * x->plane[0].src.stride - 16 * cm->mb_cols; - x->plane[1].src.buf += uv_mb_height * x->plane[1].src.stride - - uv_mb_height * cm->mb_cols; - x->plane[2].src.buf += uv_mb_height * x->plane[1].src.stride - - uv_mb_height * cm->mb_cols; - - vpx_clear_system_state(); - } - - // Clamp the image start to rows/2. This number of rows is discarded top - // and bottom as dead data so rows / 2 means the frame is blank. - if ((image_data_start_row > cm->mb_rows / 2) || - (image_data_start_row == INVALID_ROW)) { - image_data_start_row = cm->mb_rows / 2; - } - // Exclude any image dead zone - if (image_data_start_row > 0) { - intra_skip_count = - VPXMAX(0, intra_skip_count - (image_data_start_row * cm->mb_cols * 2)); - } - - { - FIRSTPASS_STATS fps; - // The minimum error here insures some bit allocation to frames even - // in static regions. The allocation per MB declines for larger formats - // where the typical "real" energy per MB also falls. - // Initial estimate here uses sqrt(mbs) to define the min_err, where the - // number of mbs is proportional to the image area. - const int num_mbs = (cpi->oxcf.resize_mode != RESIZE_NONE) - ? cpi->initial_mbs : cpi->common.MBs; - const double min_err = 200 * sqrt(num_mbs); - - intra_factor = intra_factor / (double)num_mbs; - brightness_factor = brightness_factor / (double)num_mbs; - fps.weight = intra_factor * brightness_factor; - - fps.frame = cm->current_video_frame; - fps.coded_error = (double)(coded_error >> 8) + min_err; - fps.sr_coded_error = (double)(sr_coded_error >> 8) + min_err; - fps.intra_error = (double)(intra_error >> 8) + min_err; - fps.count = 1.0; - fps.pcnt_inter = (double)intercount / num_mbs; - fps.pcnt_second_ref = (double)second_ref_count / num_mbs; - fps.pcnt_neutral = (double)neutral_count / num_mbs; - fps.intra_skip_pct = (double)intra_skip_count / num_mbs; - fps.inactive_zone_rows = (double)image_data_start_row; - fps.inactive_zone_cols = (double)0; // TODO(paulwilkins): fix - - if (mvcount > 0) { - fps.MVr = (double)sum_mvr / mvcount; - fps.mvr_abs = (double)sum_mvr_abs / mvcount; - fps.MVc = (double)sum_mvc / mvcount; - fps.mvc_abs = (double)sum_mvc_abs / mvcount; - fps.MVrv = ((double)sum_mvrs - - ((double)sum_mvr * sum_mvr / mvcount)) / mvcount; - fps.MVcv = ((double)sum_mvcs - - ((double)sum_mvc * sum_mvc / mvcount)) / mvcount; - fps.mv_in_out_count = (double)sum_in_vectors / (mvcount * 2); - fps.new_mv_count = new_mv_count; - fps.pcnt_motion = (double)mvcount / num_mbs; - } else { - fps.MVr = 0.0; - fps.mvr_abs = 0.0; - fps.MVc = 0.0; - fps.mvc_abs = 0.0; - fps.MVrv = 0.0; - fps.MVcv = 0.0; - fps.mv_in_out_count = 0.0; - fps.new_mv_count = 0.0; - fps.pcnt_motion = 0.0; - } - - // TODO(paulwilkins): Handle the case when duration is set to 0, or - // something less than the full time between subsequent values of - // cpi->source_time_stamp. - fps.duration = (double)(source->ts_end - source->ts_start); - - // Don't want to do output stats with a stack variable! - twopass->this_frame_stats = fps; - output_stats(&twopass->this_frame_stats, cpi->output_pkt_list); - accumulate_stats(&twopass->total_stats, &fps); - -#if CONFIG_FP_MB_STATS - if (cpi->use_fp_mb_stats) { - output_fpmb_stats(twopass->frame_mb_stats_buf, cm, cpi->output_pkt_list); - } -#endif - } - - // Copy the previous Last Frame back into gf and and arf buffers if - // the prediction is good enough... but also don't allow it to lag too far. - if ((twopass->sr_update_lag > 3) || - ((cm->current_video_frame > 0) && - (twopass->this_frame_stats.pcnt_inter > 0.20) && - ((twopass->this_frame_stats.intra_error / - DOUBLE_DIVIDE_CHECK(twopass->this_frame_stats.coded_error)) > 2.0))) { - if (gld_yv12 != NULL) { - ref_cnt_fb(pool->frame_bufs, &cm->ref_frame_map[cpi->gld_fb_idx], - cm->ref_frame_map[cpi->lst_fb_idx]); - } - twopass->sr_update_lag = 1; - } else { - ++twopass->sr_update_lag; - } - - vpx_extend_frame_borders(new_yv12); - - // The frame we just compressed now becomes the last frame. - ref_cnt_fb(pool->frame_bufs, &cm->ref_frame_map[cpi->lst_fb_idx], - cm->new_fb_idx); - - // Special case for the first frame. Copy into the GF buffer as a second - // reference. - if (cm->current_video_frame == 0 && cpi->gld_fb_idx != INVALID_IDX) { - ref_cnt_fb(pool->frame_bufs, &cm->ref_frame_map[cpi->gld_fb_idx], - cm->ref_frame_map[cpi->lst_fb_idx]); - } - - // Use this to see what the first pass reconstruction looks like. - if (0) { - char filename[512]; - FILE *recon_file; - snprintf(filename, sizeof(filename), "enc%04d.yuv", - (int)cm->current_video_frame); - - if (cm->current_video_frame == 0) - recon_file = fopen(filename, "wb"); - else - recon_file = fopen(filename, "ab"); - - (void)fwrite(lst_yv12->buffer_alloc, lst_yv12->frame_size, 1, recon_file); - fclose(recon_file); - } - - ++cm->current_video_frame; -} - -static double calc_correction_factor(double err_per_mb, - double err_divisor, - double pt_low, - double pt_high, - int q, - vpx_bit_depth_t bit_depth) { - const double error_term = err_per_mb / err_divisor; - - // Adjustment based on actual quantizer to power term. - const double power_term = - VPXMIN(vp10_convert_qindex_to_q(q, bit_depth) * 0.01 + pt_low, pt_high); - - // Calculate correction factor. - if (power_term < 1.0) - assert(error_term >= 0.0); - - return fclamp(pow(error_term, power_term), 0.05, 5.0); -} - -// Larger image formats are expected to be a little harder to code relatively -// given the same prediction error score. This in part at least relates to the -// increased size and hence coding cost of motion vectors. -#define EDIV_SIZE_FACTOR 800 - -static int get_twopass_worst_quality(const VP10_COMP *cpi, - const double section_err, - double inactive_zone, - int section_target_bandwidth, - double group_weight_factor) { - const RATE_CONTROL *const rc = &cpi->rc; - const VP10EncoderConfig *const oxcf = &cpi->oxcf; - - inactive_zone = fclamp(inactive_zone, 0.0, 1.0); - - if (section_target_bandwidth <= 0) { - return rc->worst_quality; // Highest value allowed - } else { - const int num_mbs = (cpi->oxcf.resize_mode != RESIZE_NONE) - ? cpi->initial_mbs : cpi->common.MBs; - const int active_mbs = VPXMAX(1, num_mbs - (int)(num_mbs * inactive_zone)); - const double av_err_per_mb = section_err / active_mbs; - const double speed_term = 1.0 + 0.04 * oxcf->speed; - const double ediv_size_correction = (double)num_mbs / EDIV_SIZE_FACTOR; - const int target_norm_bits_per_mb = ((uint64_t)section_target_bandwidth << - BPER_MB_NORMBITS) / active_mbs; - - int q; - - // Try and pick a max Q that will be high enough to encode the - // content at the given rate. - for (q = rc->best_quality; q < rc->worst_quality; ++q) { - const double factor = - calc_correction_factor(av_err_per_mb, - ERR_DIVISOR - ediv_size_correction, - FACTOR_PT_LOW, FACTOR_PT_HIGH, q, - cpi->common.bit_depth); - const int bits_per_mb = - vp10_rc_bits_per_mb(INTER_FRAME, q, - factor * speed_term * group_weight_factor, - cpi->common.bit_depth); - if (bits_per_mb <= target_norm_bits_per_mb) - break; - } - - // Restriction on active max q for constrained quality mode. - if (cpi->oxcf.rc_mode == VPX_CQ) - q = VPXMAX(q, oxcf->cq_level); - return q; - } -} - -static void setup_rf_level_maxq(VP10_COMP *cpi) { - int i; - RATE_CONTROL *const rc = &cpi->rc; - for (i = INTER_NORMAL; i < RATE_FACTOR_LEVELS; ++i) { - int qdelta = vp10_frame_type_qdelta(cpi, i, rc->worst_quality); - rc->rf_level_maxq[i] = VPXMAX(rc->worst_quality + qdelta, rc->best_quality); - } -} - -void vp10_init_subsampling(VP10_COMP *cpi) { - const VP10_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; - const int w = cm->width; - const int h = cm->height; - int i; - - for (i = 0; i < FRAME_SCALE_STEPS; ++i) { - // Note: Frames with odd-sized dimensions may result from this scaling. - rc->frame_width[i] = (w * 16) / frame_scale_factor[i]; - rc->frame_height[i] = (h * 16) / frame_scale_factor[i]; - } - - setup_rf_level_maxq(cpi); -} - -void vp10_calculate_coded_size(VP10_COMP *cpi, - int *scaled_frame_width, - int *scaled_frame_height) { - RATE_CONTROL *const rc = &cpi->rc; - *scaled_frame_width = rc->frame_width[rc->frame_size_selector]; - *scaled_frame_height = rc->frame_height[rc->frame_size_selector]; -} - -void vp10_init_second_pass(VP10_COMP *cpi) { - const VP10EncoderConfig *const oxcf = &cpi->oxcf; - TWO_PASS *const twopass = &cpi->twopass; - double frame_rate; - FIRSTPASS_STATS *stats; - - zero_stats(&twopass->total_stats); - zero_stats(&twopass->total_left_stats); - - if (!twopass->stats_in_end) - return; - - stats = &twopass->total_stats; - - *stats = *twopass->stats_in_end; - twopass->total_left_stats = *stats; - - frame_rate = 10000000.0 * stats->count / stats->duration; - // Each frame can have a different duration, as the frame rate in the source - // isn't guaranteed to be constant. The frame rate prior to the first frame - // encoded in the second pass is a guess. However, the sum duration is not. - // It is calculated based on the actual durations of all frames from the - // first pass. - vp10_new_framerate(cpi, frame_rate); - twopass->bits_left = (int64_t)(stats->duration * oxcf->target_bandwidth / - 10000000.0); - - // This variable monitors how far behind the second ref update is lagging. - twopass->sr_update_lag = 1; - - // Scan the first pass file and calculate a modified total error based upon - // the bias/power function used to allocate bits. - { - const double avg_error = stats->coded_error / - DOUBLE_DIVIDE_CHECK(stats->count); - const FIRSTPASS_STATS *s = twopass->stats_in; - double modified_error_total = 0.0; - twopass->modified_error_min = (avg_error * - oxcf->two_pass_vbrmin_section) / 100; - twopass->modified_error_max = (avg_error * - oxcf->two_pass_vbrmax_section) / 100; - while (s < twopass->stats_in_end) { - modified_error_total += calculate_modified_err(cpi, twopass, oxcf, s); - ++s; - } - twopass->modified_error_left = modified_error_total; - } - - // Reset the vbr bits off target counters - cpi->rc.vbr_bits_off_target = 0; - cpi->rc.vbr_bits_off_target_fast = 0; - - cpi->rc.rate_error_estimate = 0; - - // Static sequence monitor variables. - twopass->kf_zeromotion_pct = 100; - twopass->last_kfgroup_zeromotion_pct = 100; - - if (oxcf->resize_mode != RESIZE_NONE) { - vp10_init_subsampling(cpi); - } -} - -#define SR_DIFF_PART 0.0015 -#define MOTION_AMP_PART 0.003 -#define INTRA_PART 0.005 -#define DEFAULT_DECAY_LIMIT 0.75 -#define LOW_SR_DIFF_TRHESH 0.1 -#define SR_DIFF_MAX 128.0 - -static double get_sr_decay_rate(const VP10_COMP *cpi, - const FIRSTPASS_STATS *frame) { - const int num_mbs = (cpi->oxcf.resize_mode != RESIZE_NONE) - ? cpi->initial_mbs : cpi->common.MBs; - double sr_diff = - (frame->sr_coded_error - frame->coded_error) / num_mbs; - double sr_decay = 1.0; - double modified_pct_inter; - double modified_pcnt_intra; - const double motion_amplitude_factor = - frame->pcnt_motion * ((frame->mvc_abs + frame->mvr_abs) / 2); - - modified_pct_inter = frame->pcnt_inter; - if ((frame->intra_error / DOUBLE_DIVIDE_CHECK(frame->coded_error)) < - (double)NCOUNT_FRAME_II_THRESH) { - modified_pct_inter = frame->pcnt_inter - frame->pcnt_neutral; - } - modified_pcnt_intra = 100 * (1.0 - modified_pct_inter); - - - if ((sr_diff > LOW_SR_DIFF_TRHESH)) { - sr_diff = VPXMIN(sr_diff, SR_DIFF_MAX); - sr_decay = 1.0 - (SR_DIFF_PART * sr_diff) - - (MOTION_AMP_PART * motion_amplitude_factor) - - (INTRA_PART * modified_pcnt_intra); - } - return VPXMAX(sr_decay, VPXMIN(DEFAULT_DECAY_LIMIT, modified_pct_inter)); -} - -// This function gives an estimate of how badly we believe the prediction -// quality is decaying from frame to frame. -static double get_zero_motion_factor(const VP10_COMP *cpi, - const FIRSTPASS_STATS *frame) { - const double zero_motion_pct = frame->pcnt_inter - - frame->pcnt_motion; - double sr_decay = get_sr_decay_rate(cpi, frame); - return VPXMIN(sr_decay, zero_motion_pct); -} - -#define ZM_POWER_FACTOR 0.75 - -static double get_prediction_decay_rate(const VP10_COMP *cpi, - const FIRSTPASS_STATS *next_frame) { - const double sr_decay_rate = get_sr_decay_rate(cpi, next_frame); - const double zero_motion_factor = - (0.95 * pow((next_frame->pcnt_inter - next_frame->pcnt_motion), - ZM_POWER_FACTOR)); - - return VPXMAX(zero_motion_factor, - (sr_decay_rate + ((1.0 - sr_decay_rate) * zero_motion_factor))); -} - -// Function to test for a condition where a complex transition is followed -// by a static section. For example in slide shows where there is a fade -// between slides. This is to help with more optimal kf and gf positioning. -static int detect_transition_to_still(VP10_COMP *cpi, - int frame_interval, int still_interval, - double loop_decay_rate, - double last_decay_rate) { - TWO_PASS *const twopass = &cpi->twopass; - RATE_CONTROL *const rc = &cpi->rc; - - // Break clause to detect very still sections after motion - // For example a static image after a fade or other transition - // instead of a clean scene cut. - if (frame_interval > rc->min_gf_interval && - loop_decay_rate >= 0.999 && - last_decay_rate < 0.9) { - int j; - - // Look ahead a few frames to see if static condition persists... - for (j = 0; j < still_interval; ++j) { - const FIRSTPASS_STATS *stats = &twopass->stats_in[j]; - if (stats >= twopass->stats_in_end) - break; - - if (stats->pcnt_inter - stats->pcnt_motion < 0.999) - break; - } - - // Only if it does do we signal a transition to still. - return j == still_interval; - } - - return 0; -} - -// This function detects a flash through the high relative pcnt_second_ref -// score in the frame following a flash frame. The offset passed in should -// reflect this. -static int detect_flash(const TWO_PASS *twopass, int offset) { - const FIRSTPASS_STATS *const next_frame = read_frame_stats(twopass, offset); - - // What we are looking for here is a situation where there is a - // brief break in prediction (such as a flash) but subsequent frames - // are reasonably well predicted by an earlier (pre flash) frame. - // The recovery after a flash is indicated by a high pcnt_second_ref - // compared to pcnt_inter. - return next_frame != NULL && - next_frame->pcnt_second_ref > next_frame->pcnt_inter && - next_frame->pcnt_second_ref >= 0.5; -} - -// Update the motion related elements to the GF arf boost calculation. -static void accumulate_frame_motion_stats(const FIRSTPASS_STATS *stats, - double *mv_in_out, - double *mv_in_out_accumulator, - double *abs_mv_in_out_accumulator, - double *mv_ratio_accumulator) { - const double pct = stats->pcnt_motion; - - // Accumulate Motion In/Out of frame stats. - *mv_in_out = stats->mv_in_out_count * pct; - *mv_in_out_accumulator += *mv_in_out; - *abs_mv_in_out_accumulator += fabs(*mv_in_out); - - // Accumulate a measure of how uniform (or conversely how random) the motion - // field is (a ratio of abs(mv) / mv). - if (pct > 0.05) { - const double mvr_ratio = fabs(stats->mvr_abs) / - DOUBLE_DIVIDE_CHECK(fabs(stats->MVr)); - const double mvc_ratio = fabs(stats->mvc_abs) / - DOUBLE_DIVIDE_CHECK(fabs(stats->MVc)); - - *mv_ratio_accumulator += pct * (mvr_ratio < stats->mvr_abs ? - mvr_ratio : stats->mvr_abs); - *mv_ratio_accumulator += pct * (mvc_ratio < stats->mvc_abs ? - mvc_ratio : stats->mvc_abs); - } -} - -#define BASELINE_ERR_PER_MB 1000.0 -static double calc_frame_boost(VP10_COMP *cpi, - const FIRSTPASS_STATS *this_frame, - double this_frame_mv_in_out, - double max_boost) { - double frame_boost; - const double lq = - vp10_convert_qindex_to_q(cpi->rc.avg_frame_qindex[INTER_FRAME], - cpi->common.bit_depth); - const double boost_q_correction = VPXMIN((0.5 + (lq * 0.015)), 1.5); - int num_mbs = (cpi->oxcf.resize_mode != RESIZE_NONE) - ? cpi->initial_mbs : cpi->common.MBs; - - // Correct for any inactive region in the image - num_mbs = (int)VPXMAX(1, num_mbs * calculate_active_area(cpi, this_frame)); - - // Underlying boost factor is based on inter error ratio. - frame_boost = (BASELINE_ERR_PER_MB * num_mbs) / - DOUBLE_DIVIDE_CHECK(this_frame->coded_error); - frame_boost = frame_boost * BOOST_FACTOR * boost_q_correction; - - // Increase boost for frames where new data coming into frame (e.g. zoom out). - // Slightly reduce boost if there is a net balance of motion out of the frame - // (zoom in). The range for this_frame_mv_in_out is -1.0 to +1.0. - if (this_frame_mv_in_out > 0.0) - frame_boost += frame_boost * (this_frame_mv_in_out * 2.0); - // In the extreme case the boost is halved. - else - frame_boost += frame_boost * (this_frame_mv_in_out / 2.0); - - return VPXMIN(frame_boost, max_boost * boost_q_correction); -} - -static int calc_arf_boost(VP10_COMP *cpi, int offset, - int f_frames, int b_frames, - int *f_boost, int *b_boost) { - TWO_PASS *const twopass = &cpi->twopass; - int i; - double boost_score = 0.0; - double mv_ratio_accumulator = 0.0; - double decay_accumulator = 1.0; - double this_frame_mv_in_out = 0.0; - double mv_in_out_accumulator = 0.0; - double abs_mv_in_out_accumulator = 0.0; - int arf_boost; - int flash_detected = 0; - - // Search forward from the proposed arf/next gf position. - for (i = 0; i < f_frames; ++i) { - const FIRSTPASS_STATS *this_frame = read_frame_stats(twopass, i + offset); - if (this_frame == NULL) - break; - - // Update the motion related elements to the boost calculation. - accumulate_frame_motion_stats(this_frame, - &this_frame_mv_in_out, &mv_in_out_accumulator, - &abs_mv_in_out_accumulator, - &mv_ratio_accumulator); - - // We want to discount the flash frame itself and the recovery - // frame that follows as both will have poor scores. - flash_detected = detect_flash(twopass, i + offset) || - detect_flash(twopass, i + offset + 1); - - // Accumulate the effect of prediction quality decay. - if (!flash_detected) { - decay_accumulator *= get_prediction_decay_rate(cpi, this_frame); - decay_accumulator = decay_accumulator < MIN_DECAY_FACTOR - ? MIN_DECAY_FACTOR : decay_accumulator; - } - - boost_score += decay_accumulator * calc_frame_boost(cpi, this_frame, - this_frame_mv_in_out, - GF_MAX_BOOST); - } - - *f_boost = (int)boost_score; - - // Reset for backward looking loop. - boost_score = 0.0; - mv_ratio_accumulator = 0.0; - decay_accumulator = 1.0; - this_frame_mv_in_out = 0.0; - mv_in_out_accumulator = 0.0; - abs_mv_in_out_accumulator = 0.0; - - // Search backward towards last gf position. - for (i = -1; i >= -b_frames; --i) { - const FIRSTPASS_STATS *this_frame = read_frame_stats(twopass, i + offset); - if (this_frame == NULL) - break; - - // Update the motion related elements to the boost calculation. - accumulate_frame_motion_stats(this_frame, - &this_frame_mv_in_out, &mv_in_out_accumulator, - &abs_mv_in_out_accumulator, - &mv_ratio_accumulator); - - // We want to discount the the flash frame itself and the recovery - // frame that follows as both will have poor scores. - flash_detected = detect_flash(twopass, i + offset) || - detect_flash(twopass, i + offset + 1); - - // Cumulative effect of prediction quality decay. - if (!flash_detected) { - decay_accumulator *= get_prediction_decay_rate(cpi, this_frame); - decay_accumulator = decay_accumulator < MIN_DECAY_FACTOR - ? MIN_DECAY_FACTOR : decay_accumulator; - } - - boost_score += decay_accumulator * calc_frame_boost(cpi, this_frame, - this_frame_mv_in_out, - GF_MAX_BOOST); - } - *b_boost = (int)boost_score; - - arf_boost = (*f_boost + *b_boost); - if (arf_boost < ((b_frames + f_frames) * 20)) - arf_boost = ((b_frames + f_frames) * 20); - arf_boost = VPXMAX(arf_boost, MIN_ARF_GF_BOOST); - - return arf_boost; -} - -// Calculate a section intra ratio used in setting max loop filter. -static int calculate_section_intra_ratio(const FIRSTPASS_STATS *begin, - const FIRSTPASS_STATS *end, - int section_length) { - const FIRSTPASS_STATS *s = begin; - double intra_error = 0.0; - double coded_error = 0.0; - int i = 0; - - while (s < end && i < section_length) { - intra_error += s->intra_error; - coded_error += s->coded_error; - ++s; - ++i; - } - - return (int)(intra_error / DOUBLE_DIVIDE_CHECK(coded_error)); -} - -// Calculate the total bits to allocate in this GF/ARF group. -static int64_t calculate_total_gf_group_bits(VP10_COMP *cpi, - double gf_group_err) { - const RATE_CONTROL *const rc = &cpi->rc; - const TWO_PASS *const twopass = &cpi->twopass; - const int max_bits = frame_max_bits(rc, &cpi->oxcf); - int64_t total_group_bits; - - // Calculate the bits to be allocated to the group as a whole. - if ((twopass->kf_group_bits > 0) && (twopass->kf_group_error_left > 0)) { - total_group_bits = (int64_t)(twopass->kf_group_bits * - (gf_group_err / twopass->kf_group_error_left)); - } else { - total_group_bits = 0; - } - - // Clamp odd edge cases. - total_group_bits = (total_group_bits < 0) ? - 0 : (total_group_bits > twopass->kf_group_bits) ? - twopass->kf_group_bits : total_group_bits; - - // Clip based on user supplied data rate variability limit. - if (total_group_bits > (int64_t)max_bits * rc->baseline_gf_interval) - total_group_bits = (int64_t)max_bits * rc->baseline_gf_interval; - - return total_group_bits; -} - -// Calculate the number bits extra to assign to boosted frames in a group. -static int calculate_boost_bits(int frame_count, - int boost, int64_t total_group_bits) { - int allocation_chunks; - - // return 0 for invalid inputs (could arise e.g. through rounding errors) - if (!boost || (total_group_bits <= 0) || (frame_count <= 0) ) - return 0; - - allocation_chunks = (frame_count * 100) + boost; - - // Prevent overflow. - if (boost > 1023) { - int divisor = boost >> 10; - boost /= divisor; - allocation_chunks /= divisor; - } - - // Calculate the number of extra bits for use in the boosted frame or frames. - return VPXMAX((int)(((int64_t)boost * total_group_bits) / allocation_chunks), - 0); -} - -// Current limit on maximum number of active arfs in a GF/ARF group. -#define MAX_ACTIVE_ARFS 2 -#define ARF_SLOT1 2 -#define ARF_SLOT2 3 -// This function indirects the choice of buffers for arfs. -// At the moment the values are fixed but this may change as part of -// the integration process with other codec features that swap buffers around. -static void get_arf_buffer_indices(unsigned char *arf_buffer_indices) { - arf_buffer_indices[0] = ARF_SLOT1; - arf_buffer_indices[1] = ARF_SLOT2; -} - -static void allocate_gf_group_bits(VP10_COMP *cpi, int64_t gf_group_bits, - double group_error, int gf_arf_bits) { - RATE_CONTROL *const rc = &cpi->rc; - const VP10EncoderConfig *const oxcf = &cpi->oxcf; - TWO_PASS *const twopass = &cpi->twopass; - GF_GROUP *const gf_group = &twopass->gf_group; - FIRSTPASS_STATS frame_stats; - int i; - int frame_index = 1; - int target_frame_size; - int key_frame; - const int max_bits = frame_max_bits(&cpi->rc, &cpi->oxcf); - int64_t total_group_bits = gf_group_bits; - double modified_err = 0.0; - double err_fraction; - int mid_boost_bits = 0; - int mid_frame_idx; - unsigned char arf_buffer_indices[MAX_ACTIVE_ARFS]; - int alt_frame_index = frame_index; - - key_frame = cpi->common.frame_type == KEY_FRAME; - - get_arf_buffer_indices(arf_buffer_indices); - - // For key frames the frame target rate is already set and it - // is also the golden frame. - if (!key_frame) { - if (rc->source_alt_ref_active) { - gf_group->update_type[0] = OVERLAY_UPDATE; - gf_group->rf_level[0] = INTER_NORMAL; - gf_group->bit_allocation[0] = 0; - gf_group->arf_update_idx[0] = arf_buffer_indices[0]; - gf_group->arf_ref_idx[0] = arf_buffer_indices[0]; - } else { - gf_group->update_type[0] = GF_UPDATE; - gf_group->rf_level[0] = GF_ARF_STD; - gf_group->bit_allocation[0] = gf_arf_bits; - gf_group->arf_update_idx[0] = arf_buffer_indices[0]; - gf_group->arf_ref_idx[0] = arf_buffer_indices[0]; - } - - // Step over the golden frame / overlay frame - if (EOF == input_stats(twopass, &frame_stats)) - return; - } - - // Deduct the boost bits for arf (or gf if it is not a key frame) - // from the group total. - if (rc->source_alt_ref_pending || !key_frame) - total_group_bits -= gf_arf_bits; - - // Store the bits to spend on the ARF if there is one. - if (rc->source_alt_ref_pending) { - gf_group->update_type[alt_frame_index] = ARF_UPDATE; - gf_group->rf_level[alt_frame_index] = GF_ARF_STD; - gf_group->bit_allocation[alt_frame_index] = gf_arf_bits; - - gf_group->arf_src_offset[alt_frame_index] = - (unsigned char)(rc->baseline_gf_interval - 1); - - gf_group->arf_update_idx[alt_frame_index] = arf_buffer_indices[0]; - gf_group->arf_ref_idx[alt_frame_index] = - arf_buffer_indices[cpi->multi_arf_last_grp_enabled && - rc->source_alt_ref_active]; - ++frame_index; - - if (cpi->multi_arf_enabled) { - // Set aside a slot for a level 1 arf. - gf_group->update_type[frame_index] = ARF_UPDATE; - gf_group->rf_level[frame_index] = GF_ARF_LOW; - gf_group->arf_src_offset[frame_index] = - (unsigned char)((rc->baseline_gf_interval >> 1) - 1); - gf_group->arf_update_idx[frame_index] = arf_buffer_indices[1]; - gf_group->arf_ref_idx[frame_index] = arf_buffer_indices[0]; - ++frame_index; - } - } - - // Define middle frame - mid_frame_idx = frame_index + (rc->baseline_gf_interval >> 1) - 1; - - // Allocate bits to the other frames in the group. - for (i = 0; i < rc->baseline_gf_interval - rc->source_alt_ref_pending; ++i) { - int arf_idx = 0; - if (EOF == input_stats(twopass, &frame_stats)) - break; - - modified_err = calculate_modified_err(cpi, twopass, oxcf, &frame_stats); - - if (group_error > 0) - err_fraction = modified_err / DOUBLE_DIVIDE_CHECK(group_error); - else - err_fraction = 0.0; - - target_frame_size = (int)((double)total_group_bits * err_fraction); - - if (rc->source_alt_ref_pending && cpi->multi_arf_enabled) { - mid_boost_bits += (target_frame_size >> 4); - target_frame_size -= (target_frame_size >> 4); - - if (frame_index <= mid_frame_idx) - arf_idx = 1; - } - gf_group->arf_update_idx[frame_index] = arf_buffer_indices[arf_idx]; - gf_group->arf_ref_idx[frame_index] = arf_buffer_indices[arf_idx]; - - target_frame_size = clamp(target_frame_size, 0, - VPXMIN(max_bits, (int)total_group_bits)); - - gf_group->update_type[frame_index] = LF_UPDATE; - gf_group->rf_level[frame_index] = INTER_NORMAL; - - gf_group->bit_allocation[frame_index] = target_frame_size; - ++frame_index; - } - - // Note: - // We need to configure the frame at the end of the sequence + 1 that will be - // the start frame for the next group. Otherwise prior to the call to - // vp10_rc_get_second_pass_params() the data will be undefined. - gf_group->arf_update_idx[frame_index] = arf_buffer_indices[0]; - gf_group->arf_ref_idx[frame_index] = arf_buffer_indices[0]; - - if (rc->source_alt_ref_pending) { - gf_group->update_type[frame_index] = OVERLAY_UPDATE; - gf_group->rf_level[frame_index] = INTER_NORMAL; - - // Final setup for second arf and its overlay. - if (cpi->multi_arf_enabled) { - gf_group->bit_allocation[2] = - gf_group->bit_allocation[mid_frame_idx] + mid_boost_bits; - gf_group->update_type[mid_frame_idx] = OVERLAY_UPDATE; - gf_group->bit_allocation[mid_frame_idx] = 0; - } - } else { - gf_group->update_type[frame_index] = GF_UPDATE; - gf_group->rf_level[frame_index] = GF_ARF_STD; - } - - // Note whether multi-arf was enabled this group for next time. - cpi->multi_arf_last_grp_enabled = cpi->multi_arf_enabled; -} - -// Analyse and define a gf/arf group. -static void define_gf_group(VP10_COMP *cpi, FIRSTPASS_STATS *this_frame) { - VP10_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; - VP10EncoderConfig *const oxcf = &cpi->oxcf; - TWO_PASS *const twopass = &cpi->twopass; - FIRSTPASS_STATS next_frame; - const FIRSTPASS_STATS *const start_pos = twopass->stats_in; - int i; - - double boost_score = 0.0; - double old_boost_score = 0.0; - double gf_group_err = 0.0; -#if GROUP_ADAPTIVE_MAXQ - double gf_group_raw_error = 0.0; -#endif - double gf_group_skip_pct = 0.0; - double gf_group_inactive_zone_rows = 0.0; - double gf_first_frame_err = 0.0; - double mod_frame_err = 0.0; - - double mv_ratio_accumulator = 0.0; - double decay_accumulator = 1.0; - double zero_motion_accumulator = 1.0; - - double loop_decay_rate = 1.00; - double last_loop_decay_rate = 1.00; - - double this_frame_mv_in_out = 0.0; - double mv_in_out_accumulator = 0.0; - double abs_mv_in_out_accumulator = 0.0; - double mv_ratio_accumulator_thresh; - unsigned int allow_alt_ref = is_altref_enabled(cpi); - - int f_boost = 0; - int b_boost = 0; - int flash_detected; - int active_max_gf_interval; - int active_min_gf_interval; - int64_t gf_group_bits; - double gf_group_error_left; - int gf_arf_bits; - const int is_key_frame = frame_is_intra_only(cm); - const int arf_active_or_kf = is_key_frame || rc->source_alt_ref_active; - - // Reset the GF group data structures unless this is a key - // frame in which case it will already have been done. - if (is_key_frame == 0) { - vp10_zero(twopass->gf_group); - } - - vpx_clear_system_state(); - vp10_zero(next_frame); - - // Load stats for the current frame. - mod_frame_err = calculate_modified_err(cpi, twopass, oxcf, this_frame); - - // Note the error of the frame at the start of the group. This will be - // the GF frame error if we code a normal gf. - gf_first_frame_err = mod_frame_err; - - // 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 (arf_active_or_kf) { - gf_group_err -= gf_first_frame_err; -#if GROUP_ADAPTIVE_MAXQ - gf_group_raw_error -= this_frame->coded_error; -#endif - gf_group_skip_pct -= this_frame->intra_skip_pct; - gf_group_inactive_zone_rows -= this_frame->inactive_zone_rows; - } - - // Motion breakout threshold for loop below depends on image size. - mv_ratio_accumulator_thresh = - (cpi->initial_height + cpi->initial_width) / 4.0; - - // Set a maximum and minimum interval for the GF group. - // If the image appears almost completely static we can extend beyond this. - { - int int_max_q = - (int)(vp10_convert_qindex_to_q(twopass->active_worst_quality, - cpi->common.bit_depth)); - int int_lbq = - (int)(vp10_convert_qindex_to_q(rc->last_boosted_qindex, - cpi->common.bit_depth)); - active_min_gf_interval = rc->min_gf_interval + VPXMIN(2, int_max_q / 200); - if (active_min_gf_interval > rc->max_gf_interval) - active_min_gf_interval = rc->max_gf_interval; - - if (cpi->multi_arf_allowed) { - active_max_gf_interval = rc->max_gf_interval; - } else { - // The value chosen depends on the active Q range. At low Q we have - // bits to spare and are better with a smaller interval and smaller boost. - // At high Q when there are few bits to spare we are better with a longer - // interval to spread the cost of the GF. - active_max_gf_interval = 12 + VPXMIN(4, (int_lbq / 6)); - if (active_max_gf_interval < active_min_gf_interval) - active_max_gf_interval = active_min_gf_interval; - - if (active_max_gf_interval > rc->max_gf_interval) - active_max_gf_interval = rc->max_gf_interval; - if (active_max_gf_interval < active_min_gf_interval) - active_max_gf_interval = active_min_gf_interval; - } - } - - i = 0; - while (i < rc->static_scene_max_gf_interval && i < rc->frames_to_key) { - ++i; - - // Accumulate error score of frames in this gf group. - mod_frame_err = calculate_modified_err(cpi, twopass, oxcf, this_frame); - gf_group_err += mod_frame_err; -#if GROUP_ADAPTIVE_MAXQ - gf_group_raw_error += this_frame->coded_error; -#endif - gf_group_skip_pct += this_frame->intra_skip_pct; - gf_group_inactive_zone_rows += this_frame->inactive_zone_rows; - - if (EOF == input_stats(twopass, &next_frame)) - break; - - // Test for the case where there is a brief flash but the prediction - // quality back to an earlier frame is then restored. - flash_detected = detect_flash(twopass, 0); - - // Update the motion related elements to the boost calculation. - accumulate_frame_motion_stats(&next_frame, - &this_frame_mv_in_out, &mv_in_out_accumulator, - &abs_mv_in_out_accumulator, - &mv_ratio_accumulator); - - // Accumulate the effect of prediction quality decay. - if (!flash_detected) { - last_loop_decay_rate = loop_decay_rate; - loop_decay_rate = get_prediction_decay_rate(cpi, &next_frame); - - decay_accumulator = decay_accumulator * loop_decay_rate; - - // Monitor for static sections. - zero_motion_accumulator = VPXMIN( - zero_motion_accumulator, get_zero_motion_factor(cpi, &next_frame)); - - // Break clause to detect very still sections after motion. For example, - // a static image after a fade or other transition. - if (detect_transition_to_still(cpi, i, 5, loop_decay_rate, - last_loop_decay_rate)) { - allow_alt_ref = 0; - break; - } - } - - // Calculate a boost number for this frame. - boost_score += decay_accumulator * calc_frame_boost(cpi, &next_frame, - this_frame_mv_in_out, - GF_MAX_BOOST); - - // Break out conditions. - if ( - // Break at active_max_gf_interval unless almost totally static. - (i >= (active_max_gf_interval + arf_active_or_kf) && - zero_motion_accumulator < 0.995) || - ( - // Don't break out with a very short interval. - (i >= active_min_gf_interval + arf_active_or_kf) && - (!flash_detected) && - ((mv_ratio_accumulator > mv_ratio_accumulator_thresh) || - (abs_mv_in_out_accumulator > 3.0) || - (mv_in_out_accumulator < -2.0) || - ((boost_score - old_boost_score) < BOOST_BREAKOUT)))) { - boost_score = old_boost_score; - break; - } - - *this_frame = next_frame; - old_boost_score = boost_score; - } - - twopass->gf_zeromotion_pct = (int)(zero_motion_accumulator * 1000.0); - - // Was the group length constrained by the requirement for a new KF? - rc->constrained_gf_group = (i >= rc->frames_to_key) ? 1 : 0; - - // Should we use the alternate reference frame. - if (allow_alt_ref && - (i < cpi->oxcf.lag_in_frames) && - (i >= rc->min_gf_interval)) { - // Calculate the boost for alt ref. - rc->gfu_boost = calc_arf_boost(cpi, 0, (i - 1), (i - 1), &f_boost, - &b_boost); - rc->source_alt_ref_pending = 1; - - // Test to see if multi arf is appropriate. - cpi->multi_arf_enabled = - (cpi->multi_arf_allowed && (rc->baseline_gf_interval >= 6) && - (zero_motion_accumulator < 0.995)) ? 1 : 0; - } else { - rc->gfu_boost = VPXMAX((int)boost_score, MIN_ARF_GF_BOOST); - rc->source_alt_ref_pending = 0; - } - - // Set the interval until the next gf. - rc->baseline_gf_interval = i - (is_key_frame || rc->source_alt_ref_pending); - - rc->frames_till_gf_update_due = rc->baseline_gf_interval; - - // Reset the file position. - reset_fpf_position(twopass, start_pos); - - // Calculate the bits to be allocated to the gf/arf group as a whole - gf_group_bits = calculate_total_gf_group_bits(cpi, gf_group_err); - -#if GROUP_ADAPTIVE_MAXQ - // Calculate an estimate of the maxq needed for the group. - // We are more agressive about correcting for sections - // where there could be significant overshoot than for easier - // sections where we do not wish to risk creating an overshoot - // of the allocated bit budget. - if ((cpi->oxcf.rc_mode != VPX_Q) && (rc->baseline_gf_interval > 1)) { - const int vbr_group_bits_per_frame = - (int)(gf_group_bits / rc->baseline_gf_interval); - const double group_av_err = gf_group_raw_error / rc->baseline_gf_interval; - const double group_av_skip_pct = - gf_group_skip_pct / rc->baseline_gf_interval; - const double group_av_inactive_zone = - ((gf_group_inactive_zone_rows * 2) / - (rc->baseline_gf_interval * (double)cm->mb_rows)); - - int tmp_q; - // rc factor is a weight factor that corrects for local rate control drift. - double rc_factor = 1.0; - if (rc->rate_error_estimate > 0) { - rc_factor = VPXMAX(RC_FACTOR_MIN, - (double)(100 - rc->rate_error_estimate) / 100.0); - } else { - rc_factor = VPXMIN(RC_FACTOR_MAX, - (double)(100 - rc->rate_error_estimate) / 100.0); - } - tmp_q = - get_twopass_worst_quality(cpi, group_av_err, - (group_av_skip_pct + group_av_inactive_zone), - vbr_group_bits_per_frame, - twopass->kfgroup_inter_fraction * rc_factor); - twopass->active_worst_quality = - VPXMAX(tmp_q, twopass->active_worst_quality >> 1); - } -#endif - - // Calculate the extra bits to be used for boosted frame(s) - gf_arf_bits = calculate_boost_bits(rc->baseline_gf_interval, - rc->gfu_boost, gf_group_bits); - - // Adjust KF group bits and error remaining. - twopass->kf_group_error_left -= (int64_t)gf_group_err; - - // 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 among 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 (rc->source_alt_ref_pending) { - gf_group_error_left = gf_group_err - mod_frame_err; - } else if (is_key_frame == 0) { - gf_group_error_left = gf_group_err - gf_first_frame_err; - } else { - gf_group_error_left = gf_group_err; - } - - // Allocate bits to each of the frames in the GF group. - allocate_gf_group_bits(cpi, gf_group_bits, gf_group_error_left, gf_arf_bits); - - // Reset the file position. - reset_fpf_position(twopass, start_pos); - - // Calculate a section intra ratio used in setting max loop filter. - if (cpi->common.frame_type != KEY_FRAME) { - twopass->section_intra_rating = - calculate_section_intra_ratio(start_pos, twopass->stats_in_end, - rc->baseline_gf_interval); - } - - if (oxcf->resize_mode == RESIZE_DYNAMIC) { - // Default to starting GF groups at normal frame size. - cpi->rc.next_frame_size_selector = UNSCALED; - } -} - -// Threshold for use of the lagging second reference frame. High second ref -// usage may point to a transient event like a flash or occlusion rather than -// a real scene cut. -#define SECOND_REF_USEAGE_THRESH 0.1 -// Minimum % intra coding observed in first pass (1.0 = 100%) -#define MIN_INTRA_LEVEL 0.25 -// Minimum ratio between the % of intra coding and inter coding in the first -// pass after discounting neutral blocks (discounting neutral blocks in this -// way helps catch scene cuts in clips with very flat areas or letter box -// format clips with image padding. -#define INTRA_VS_INTER_THRESH 2.0 -// Hard threshold where the first pass chooses intra for almost all blocks. -// In such a case even if the frame is not a scene cut coding a key frame -// may be a good option. -#define VERY_LOW_INTER_THRESH 0.05 -// Maximum threshold for the relative ratio of intra error score vs best -// inter error score. -#define KF_II_ERR_THRESHOLD 2.5 -// In real scene cuts there is almost always a sharp change in the intra -// or inter error score. -#define ERR_CHANGE_THRESHOLD 0.4 -// For real scene cuts we expect an improvment in the intra inter error -// ratio in the next frame. -#define II_IMPROVEMENT_THRESHOLD 3.5 -#define KF_II_MAX 128.0 - -static int test_candidate_kf(TWO_PASS *twopass, - const FIRSTPASS_STATS *last_frame, - const FIRSTPASS_STATS *this_frame, - const FIRSTPASS_STATS *next_frame) { - int is_viable_kf = 0; - double pcnt_intra = 1.0 - this_frame->pcnt_inter; - double modified_pcnt_inter = - this_frame->pcnt_inter - this_frame->pcnt_neutral; - - // Does the frame satisfy the primary criteria of a key frame? - // See above for an explanation of the test criteria. - // If so, then examine how well it predicts subsequent frames. - if ((this_frame->pcnt_second_ref < SECOND_REF_USEAGE_THRESH) && - (next_frame->pcnt_second_ref < SECOND_REF_USEAGE_THRESH) && - ((this_frame->pcnt_inter < VERY_LOW_INTER_THRESH) || - ((pcnt_intra > MIN_INTRA_LEVEL) && - (pcnt_intra > (INTRA_VS_INTER_THRESH * modified_pcnt_inter)) && - ((this_frame->intra_error / - DOUBLE_DIVIDE_CHECK(this_frame->coded_error)) < - KF_II_ERR_THRESHOLD) && - ((fabs(last_frame->coded_error - this_frame->coded_error) / - DOUBLE_DIVIDE_CHECK(this_frame->coded_error) > - ERR_CHANGE_THRESHOLD) || - (fabs(last_frame->intra_error - this_frame->intra_error) / - DOUBLE_DIVIDE_CHECK(this_frame->intra_error) > - ERR_CHANGE_THRESHOLD) || - ((next_frame->intra_error / - DOUBLE_DIVIDE_CHECK(next_frame->coded_error)) > - II_IMPROVEMENT_THRESHOLD))))) { - int i; - const FIRSTPASS_STATS *start_pos = twopass->stats_in; - FIRSTPASS_STATS local_next_frame = *next_frame; - double boost_score = 0.0; - double old_boost_score = 0.0; - double decay_accumulator = 1.0; - - // Examine how well the key frame predicts subsequent frames. - for (i = 0; i < 16; ++i) { - double next_iiratio = (BOOST_FACTOR * local_next_frame.intra_error / - DOUBLE_DIVIDE_CHECK(local_next_frame.coded_error)); - - if (next_iiratio > KF_II_MAX) - next_iiratio = KF_II_MAX; - - // Cumulative effect of decay in prediction quality. - if (local_next_frame.pcnt_inter > 0.85) - decay_accumulator *= local_next_frame.pcnt_inter; - else - decay_accumulator *= (0.85 + local_next_frame.pcnt_inter) / 2.0; - - // Keep a running total. - boost_score += (decay_accumulator * next_iiratio); - - // Test various breakout clauses. - if ((local_next_frame.pcnt_inter < 0.05) || - (next_iiratio < 1.5) || - (((local_next_frame.pcnt_inter - - local_next_frame.pcnt_neutral) < 0.20) && - (next_iiratio < 3.0)) || - ((boost_score - old_boost_score) < 3.0) || - (local_next_frame.intra_error < 200)) { - break; - } - - old_boost_score = boost_score; - - // Get the next frame details - if (EOF == input_stats(twopass, &local_next_frame)) - break; - } - - // If there is tolerable prediction for at least the next 3 frames then - // break out else discard this potential key frame and move on - if (boost_score > 30.0 && (i > 3)) { - is_viable_kf = 1; - } else { - // Reset the file position - reset_fpf_position(twopass, start_pos); - - is_viable_kf = 0; - } - } - - return is_viable_kf; -} - -static void find_next_key_frame(VP10_COMP *cpi, FIRSTPASS_STATS *this_frame) { - int i, j; - RATE_CONTROL *const rc = &cpi->rc; - TWO_PASS *const twopass = &cpi->twopass; - GF_GROUP *const gf_group = &twopass->gf_group; - const VP10EncoderConfig *const oxcf = &cpi->oxcf; - const FIRSTPASS_STATS first_frame = *this_frame; - const FIRSTPASS_STATS *const start_position = twopass->stats_in; - FIRSTPASS_STATS next_frame; - FIRSTPASS_STATS last_frame; - int kf_bits = 0; - int loop_decay_counter = 0; - double decay_accumulator = 1.0; - double av_decay_accumulator = 0.0; - double zero_motion_accumulator = 1.0; - double boost_score = 0.0; - double kf_mod_err = 0.0; - double kf_group_err = 0.0; - double recent_loop_decay[8] = {1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0}; - - vp10_zero(next_frame); - - cpi->common.frame_type = KEY_FRAME; - - // Reset the GF group data structures. - vp10_zero(*gf_group); - - // Is this a forced key frame by interval. - rc->this_key_frame_forced = rc->next_key_frame_forced; - - // Clear the alt ref active flag and last group multi arf flags as they - // can never be set for a key frame. - rc->source_alt_ref_active = 0; - cpi->multi_arf_last_grp_enabled = 0; - - // KF is always a GF so clear frames till next gf counter. - rc->frames_till_gf_update_due = 0; - - rc->frames_to_key = 1; - - twopass->kf_group_bits = 0; // Total bits available to kf group - twopass->kf_group_error_left = 0; // Group modified error score. - - kf_mod_err = calculate_modified_err(cpi, twopass, oxcf, this_frame); - - // Find the next keyframe. - i = 0; - while (twopass->stats_in < twopass->stats_in_end && - rc->frames_to_key < cpi->oxcf.key_freq) { - // Accumulate kf group error. - kf_group_err += calculate_modified_err(cpi, twopass, oxcf, this_frame); - - // Load the next frame's stats. - last_frame = *this_frame; - input_stats(twopass, this_frame); - - // Provided that we are not at the end of the file... - if (cpi->oxcf.auto_key && twopass->stats_in < twopass->stats_in_end) { - double loop_decay_rate; - - // Check for a scene cut. - if (test_candidate_kf(twopass, &last_frame, this_frame, - twopass->stats_in)) - break; - - // How fast is the prediction quality decaying? - loop_decay_rate = get_prediction_decay_rate(cpi, twopass->stats_in); - - // We want to know something about the recent past... rather than - // as used elsewhere where we are concerned with decay in prediction - // quality since the last GF or KF. - recent_loop_decay[i % 8] = loop_decay_rate; - decay_accumulator = 1.0; - for (j = 0; j < 8; ++j) - decay_accumulator *= recent_loop_decay[j]; - - // Special check for transition or high motion followed by a - // static scene. - if (detect_transition_to_still(cpi, i, cpi->oxcf.key_freq - i, - loop_decay_rate, decay_accumulator)) - break; - - // Step on to the next frame. - ++rc->frames_to_key; - - // If we don't have a real key frame within the next two - // key_freq intervals then break out of the loop. - if (rc->frames_to_key >= 2 * cpi->oxcf.key_freq) - break; - } else { - ++rc->frames_to_key; - } - ++i; - } - - // If there is a max kf interval set by the user we must obey it. - // We already breakout of the loop above at 2x max. - // This code centers the extra kf if the actual natural interval - // is between 1x and 2x. - if (cpi->oxcf.auto_key && - rc->frames_to_key > cpi->oxcf.key_freq) { - FIRSTPASS_STATS tmp_frame = first_frame; - - rc->frames_to_key /= 2; - - // Reset to the start of the group. - reset_fpf_position(twopass, start_position); - - kf_group_err = 0.0; - - // Rescan to get the correct error data for the forced kf group. - for (i = 0; i < rc->frames_to_key; ++i) { - kf_group_err += calculate_modified_err(cpi, twopass, oxcf, &tmp_frame); - input_stats(twopass, &tmp_frame); - } - rc->next_key_frame_forced = 1; - } else if (twopass->stats_in == twopass->stats_in_end || - rc->frames_to_key >= cpi->oxcf.key_freq) { - rc->next_key_frame_forced = 1; - } else { - rc->next_key_frame_forced = 0; - } - - // Special case for the last key frame of the file. - if (twopass->stats_in >= twopass->stats_in_end) { - // Accumulate kf group error. - kf_group_err += calculate_modified_err(cpi, twopass, oxcf, this_frame); - } - - // Calculate the number of bits that should be assigned to the kf group. - if (twopass->bits_left > 0 && twopass->modified_error_left > 0.0) { - // Maximum number of bits for a single normal frame (not key frame). - const int max_bits = frame_max_bits(rc, &cpi->oxcf); - - // Maximum number of bits allocated to the key frame group. - int64_t max_grp_bits; - - // Default allocation based on bits left and relative - // complexity of the section. - twopass->kf_group_bits = (int64_t)(twopass->bits_left * - (kf_group_err / twopass->modified_error_left)); - - // Clip based on maximum per frame rate defined by the user. - max_grp_bits = (int64_t)max_bits * (int64_t)rc->frames_to_key; - if (twopass->kf_group_bits > max_grp_bits) - twopass->kf_group_bits = max_grp_bits; - } else { - twopass->kf_group_bits = 0; - } - twopass->kf_group_bits = VPXMAX(0, twopass->kf_group_bits); - - // Reset the first pass file position. - reset_fpf_position(twopass, start_position); - - // Scan through the kf group collating various stats used to determine - // how many bits to spend on it. - decay_accumulator = 1.0; - boost_score = 0.0; - for (i = 0; i < (rc->frames_to_key - 1); ++i) { - if (EOF == input_stats(twopass, &next_frame)) - break; - - // Monitor for static sections. - zero_motion_accumulator = VPXMIN( - zero_motion_accumulator, get_zero_motion_factor(cpi, &next_frame)); - - // Not all frames in the group are necessarily used in calculating boost. - if ((i <= rc->max_gf_interval) || - ((i <= (rc->max_gf_interval * 4)) && (decay_accumulator > 0.5))) { - const double frame_boost = - calc_frame_boost(cpi, this_frame, 0, KF_MAX_BOOST); - - // How fast is prediction quality decaying. - if (!detect_flash(twopass, 0)) { - const double loop_decay_rate = - get_prediction_decay_rate(cpi, &next_frame); - decay_accumulator *= loop_decay_rate; - decay_accumulator = VPXMAX(decay_accumulator, MIN_DECAY_FACTOR); - av_decay_accumulator += decay_accumulator; - ++loop_decay_counter; - } - boost_score += (decay_accumulator * frame_boost); - } - } - av_decay_accumulator /= (double)loop_decay_counter; - - reset_fpf_position(twopass, start_position); - - // Store the zero motion percentage - twopass->kf_zeromotion_pct = (int)(zero_motion_accumulator * 100.0); - - // Calculate a section intra ratio used in setting max loop filter. - twopass->section_intra_rating = - calculate_section_intra_ratio(start_position, twopass->stats_in_end, - rc->frames_to_key); - - // Apply various clamps for min and max boost - rc->kf_boost = (int)(av_decay_accumulator * boost_score); - rc->kf_boost = VPXMAX(rc->kf_boost, (rc->frames_to_key * 3)); - rc->kf_boost = VPXMAX(rc->kf_boost, MIN_KF_BOOST); - - // Work out how many bits to allocate for the key frame itself. - kf_bits = calculate_boost_bits((rc->frames_to_key - 1), - rc->kf_boost, twopass->kf_group_bits); - - // Work out the fraction of the kf group bits reserved for the inter frames - // within the group after discounting the bits for the kf itself. - if (twopass->kf_group_bits) { - twopass->kfgroup_inter_fraction = - (double)(twopass->kf_group_bits - kf_bits) / - (double)twopass->kf_group_bits; - } else { - twopass->kfgroup_inter_fraction = 1.0; - } - - twopass->kf_group_bits -= kf_bits; - - // Save the bits to spend on the key frame. - gf_group->bit_allocation[0] = kf_bits; - gf_group->update_type[0] = KF_UPDATE; - gf_group->rf_level[0] = KF_STD; - - // Note the total error score of the kf group minus the key frame itself. - twopass->kf_group_error_left = (int)(kf_group_err - kf_mod_err); - - // Adjust the count of total modified error left. - // The count of bits left is adjusted elsewhere based on real coded frame - // sizes. - twopass->modified_error_left -= kf_group_err; - - if (oxcf->resize_mode == RESIZE_DYNAMIC) { - // Default to normal-sized frame on keyframes. - cpi->rc.next_frame_size_selector = UNSCALED; - } -} - -// Define the reference buffers that will be updated post encode. -static void configure_buffer_updates(VP10_COMP *cpi) { - TWO_PASS *const twopass = &cpi->twopass; - - cpi->rc.is_src_frame_alt_ref = 0; - switch (twopass->gf_group.update_type[twopass->gf_group.index]) { - case KF_UPDATE: - cpi->refresh_last_frame = 1; - cpi->refresh_golden_frame = 1; - cpi->refresh_alt_ref_frame = 1; - break; - case LF_UPDATE: - cpi->refresh_last_frame = 1; - cpi->refresh_golden_frame = 0; - cpi->refresh_alt_ref_frame = 0; - break; - case GF_UPDATE: - cpi->refresh_last_frame = 1; - cpi->refresh_golden_frame = 1; - cpi->refresh_alt_ref_frame = 0; - break; - case OVERLAY_UPDATE: - cpi->refresh_last_frame = 0; - cpi->refresh_golden_frame = 1; - cpi->refresh_alt_ref_frame = 0; - cpi->rc.is_src_frame_alt_ref = 1; - break; - case ARF_UPDATE: - cpi->refresh_last_frame = 0; - cpi->refresh_golden_frame = 0; - cpi->refresh_alt_ref_frame = 1; - break; - default: - assert(0); - break; - } -} - -static int is_skippable_frame(const VP10_COMP *cpi) { - // If the current frame does not have non-zero motion vector detected in the - // first pass, and so do its previous and forward frames, then this frame - // can be skipped for partition check, and the partition size is assigned - // according to the variance - const TWO_PASS *const twopass = &cpi->twopass; - - return (!frame_is_intra_only(&cpi->common) && - twopass->stats_in - 2 > twopass->stats_in_start && - twopass->stats_in < twopass->stats_in_end && - (twopass->stats_in - 1)->pcnt_inter - (twopass->stats_in - 1)->pcnt_motion - == 1 && - (twopass->stats_in - 2)->pcnt_inter - (twopass->stats_in - 2)->pcnt_motion - == 1 && - twopass->stats_in->pcnt_inter - twopass->stats_in->pcnt_motion == 1); -} - -void vp10_rc_get_second_pass_params(VP10_COMP *cpi) { - VP10_COMMON *const cm = &cpi->common; - RATE_CONTROL *const rc = &cpi->rc; - TWO_PASS *const twopass = &cpi->twopass; - GF_GROUP *const gf_group = &twopass->gf_group; - int frames_left; - FIRSTPASS_STATS this_frame; - - int target_rate; - - frames_left = (int)(twopass->total_stats.count - - cm->current_video_frame); - - if (!twopass->stats_in) - return; - - // If this is an arf frame then we dont want to read the stats file or - // advance the input pointer as we already have what we need. - if (gf_group->update_type[gf_group->index] == ARF_UPDATE) { - int target_rate; - configure_buffer_updates(cpi); - target_rate = gf_group->bit_allocation[gf_group->index]; - target_rate = vp10_rc_clamp_pframe_target_size(cpi, target_rate); - rc->base_frame_target = target_rate; - - cm->frame_type = INTER_FRAME; - - // Do the firstpass stats indicate that this frame is skippable for the - // partition search? - if (cpi->sf.allow_partition_search_skip && cpi->oxcf.pass == 2) { - cpi->partition_search_skippable_frame = is_skippable_frame(cpi); - } - - return; - } - - vpx_clear_system_state(); - - if (cpi->oxcf.rc_mode == VPX_Q) { - twopass->active_worst_quality = cpi->oxcf.cq_level; - } else if (cm->current_video_frame == 0) { - // Special case code for first frame. - const int section_target_bandwidth = (int)(twopass->bits_left / - frames_left); - const double section_length = twopass->total_left_stats.count; - const double section_error = - twopass->total_left_stats.coded_error / section_length; - const double section_intra_skip = - twopass->total_left_stats.intra_skip_pct / section_length; - const double section_inactive_zone = - (twopass->total_left_stats.inactive_zone_rows * 2) / - ((double)cm->mb_rows * section_length); - const int tmp_q = - get_twopass_worst_quality(cpi, section_error, - section_intra_skip + section_inactive_zone, - section_target_bandwidth, DEFAULT_GRP_WEIGHT); - - twopass->active_worst_quality = tmp_q; - twopass->baseline_active_worst_quality = tmp_q; - rc->ni_av_qi = tmp_q; - rc->last_q[INTER_FRAME] = tmp_q; - rc->avg_q = vp10_convert_qindex_to_q(tmp_q, cm->bit_depth); - rc->avg_frame_qindex[INTER_FRAME] = tmp_q; - rc->last_q[KEY_FRAME] = (tmp_q + cpi->oxcf.best_allowed_q) / 2; - rc->avg_frame_qindex[KEY_FRAME] = rc->last_q[KEY_FRAME]; - } - vp10_zero(this_frame); - if (EOF == input_stats(twopass, &this_frame)) - return; - - // Set the frame content type flag. - if (this_frame.intra_skip_pct >= FC_ANIMATION_THRESH) - twopass->fr_content_type = FC_GRAPHICS_ANIMATION; - else - twopass->fr_content_type = FC_NORMAL; - - // Keyframe and section processing. - if (rc->frames_to_key == 0 || (cpi->frame_flags & FRAMEFLAGS_KEY)) { - FIRSTPASS_STATS this_frame_copy; - this_frame_copy = this_frame; - // Define next KF group and assign bits to it. - find_next_key_frame(cpi, &this_frame); - this_frame = this_frame_copy; - } else { - cm->frame_type = INTER_FRAME; - } - - // Define a new GF/ARF group. (Should always enter here for key frames). - if (rc->frames_till_gf_update_due == 0) { - define_gf_group(cpi, &this_frame); - - rc->frames_till_gf_update_due = rc->baseline_gf_interval; - -#if ARF_STATS_OUTPUT - { - FILE *fpfile; - fpfile = fopen("arf.stt", "a"); - ++arf_count; - fprintf(fpfile, "%10d %10ld %10d %10d %10ld\n", - cm->current_video_frame, rc->frames_till_gf_update_due, - rc->kf_boost, arf_count, rc->gfu_boost); - - fclose(fpfile); - } -#endif - } - - configure_buffer_updates(cpi); - - // Do the firstpass stats indicate that this frame is skippable for the - // partition search? - if (cpi->sf.allow_partition_search_skip && cpi->oxcf.pass == 2) { - cpi->partition_search_skippable_frame = is_skippable_frame(cpi); - } - - target_rate = gf_group->bit_allocation[gf_group->index]; - if (cpi->common.frame_type == KEY_FRAME) - target_rate = vp10_rc_clamp_iframe_target_size(cpi, target_rate); - else - target_rate = vp10_rc_clamp_pframe_target_size(cpi, target_rate); - - rc->base_frame_target = target_rate; - - { - const int num_mbs = (cpi->oxcf.resize_mode != RESIZE_NONE) - ? cpi->initial_mbs : cpi->common.MBs; - // The multiplication by 256 reverses a scaling factor of (>> 8) - // applied when combining MB error values for the frame. - twopass->mb_av_energy = - log(((this_frame.intra_error * 256.0) / num_mbs) + 1.0); - } - - // Update the total stats remaining structure. - subtract_stats(&twopass->total_left_stats, &this_frame); -} - -#define MINQ_ADJ_LIMIT 48 -#define MINQ_ADJ_LIMIT_CQ 20 -#define HIGH_UNDERSHOOT_RATIO 2 -void vp10_twopass_postencode_update(VP10_COMP *cpi) { - TWO_PASS *const twopass = &cpi->twopass; - RATE_CONTROL *const rc = &cpi->rc; - const int bits_used = rc->base_frame_target; - - // VBR correction is done through rc->vbr_bits_off_target. Based on the - // sign of this value, a limited % adjustment is made to the target rate - // of subsequent frames, to try and push it back towards 0. This method - // is designed to prevent extreme behaviour at the end of a clip - // or group of frames. - rc->vbr_bits_off_target += rc->base_frame_target - rc->projected_frame_size; - twopass->bits_left = VPXMAX(twopass->bits_left - bits_used, 0); - - // Calculate the pct rc error. - if (rc->total_actual_bits) { - rc->rate_error_estimate = - (int)((rc->vbr_bits_off_target * 100) / rc->total_actual_bits); - rc->rate_error_estimate = clamp(rc->rate_error_estimate, -100, 100); - } else { - rc->rate_error_estimate = 0; - } - - if (cpi->common.frame_type != KEY_FRAME) { - twopass->kf_group_bits -= bits_used; - twopass->last_kfgroup_zeromotion_pct = twopass->kf_zeromotion_pct; - } - twopass->kf_group_bits = VPXMAX(twopass->kf_group_bits, 0); - - // Increment the gf group index ready for the next frame. - ++twopass->gf_group.index; - - // If the rate control is drifting consider adjustment to min or maxq. - if ((cpi->oxcf.rc_mode != VPX_Q) && - (cpi->twopass.gf_zeromotion_pct < VLOW_MOTION_THRESHOLD) && - !cpi->rc.is_src_frame_alt_ref) { - const int maxq_adj_limit = - rc->worst_quality - twopass->active_worst_quality; - const int minq_adj_limit = - (cpi->oxcf.rc_mode == VPX_CQ ? MINQ_ADJ_LIMIT_CQ : MINQ_ADJ_LIMIT); - - // Undershoot. - if (rc->rate_error_estimate > cpi->oxcf.under_shoot_pct) { - --twopass->extend_maxq; - if (rc->rolling_target_bits >= rc->rolling_actual_bits) - ++twopass->extend_minq; - // Overshoot. - } else if (rc->rate_error_estimate < -cpi->oxcf.over_shoot_pct) { - --twopass->extend_minq; - if (rc->rolling_target_bits < rc->rolling_actual_bits) - ++twopass->extend_maxq; - } else { - // Adjustment for extreme local overshoot. - if (rc->projected_frame_size > (2 * rc->base_frame_target) && - rc->projected_frame_size > (2 * rc->avg_frame_bandwidth)) - ++twopass->extend_maxq; - - // Unwind undershoot or overshoot adjustment. - if (rc->rolling_target_bits < rc->rolling_actual_bits) - --twopass->extend_minq; - else if (rc->rolling_target_bits > rc->rolling_actual_bits) - --twopass->extend_maxq; - } - - twopass->extend_minq = clamp(twopass->extend_minq, 0, minq_adj_limit); - twopass->extend_maxq = clamp(twopass->extend_maxq, 0, maxq_adj_limit); - - // If there is a big and undexpected undershoot then feed the extra - // bits back in quickly. One situation where this may happen is if a - // frame is unexpectedly almost perfectly predicted by the ARF or GF - // but not very well predcited by the previous frame. - if (!frame_is_kf_gf_arf(cpi) && !cpi->rc.is_src_frame_alt_ref) { - int fast_extra_thresh = rc->base_frame_target / HIGH_UNDERSHOOT_RATIO; - if (rc->projected_frame_size < fast_extra_thresh) { - rc->vbr_bits_off_target_fast += - fast_extra_thresh - rc->projected_frame_size; - rc->vbr_bits_off_target_fast = - VPXMIN(rc->vbr_bits_off_target_fast, (4 * rc->avg_frame_bandwidth)); - - // Fast adaptation of minQ if necessary to use up the extra bits. - if (rc->avg_frame_bandwidth) { - twopass->extend_minq_fast = - (int)(rc->vbr_bits_off_target_fast * 8 / rc->avg_frame_bandwidth); - } - twopass->extend_minq_fast = VPXMIN( - twopass->extend_minq_fast, minq_adj_limit - twopass->extend_minq); - } else if (rc->vbr_bits_off_target_fast) { - twopass->extend_minq_fast = VPXMIN( - twopass->extend_minq_fast, minq_adj_limit - twopass->extend_minq); - } else { - twopass->extend_minq_fast = 0; - } - } - } -} |