c2d7f5e3c5
Change-Id: Ie68eefddf9b0120021668cf21dc2c6fc837c50ac
2287 lines
80 KiB
C
2287 lines
80 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <limits.h>
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#include <math.h>
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#include <stdio.h>
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#include "./vpx_scale_rtcd.h"
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#include "vpx_mem/vpx_mem.h"
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#include "vpx_scale/vpx_scale.h"
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#include "vpx_scale/yv12config.h"
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#include "vp9/common/vp9_entropymv.h"
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#include "vp9/common/vp9_quant_common.h"
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#include "vp9/common/vp9_reconinter.h" // vp9_setup_dst_planes()
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#include "vp9/common/vp9_systemdependent.h"
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#include "vp9/encoder/vp9_block.h"
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#include "vp9/encoder/vp9_encodeframe.h"
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#include "vp9/encoder/vp9_encodemb.h"
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#include "vp9/encoder/vp9_encodemv.h"
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#include "vp9/encoder/vp9_extend.h"
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#include "vp9/encoder/vp9_firstpass.h"
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#include "vp9/encoder/vp9_mcomp.h"
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#include "vp9/encoder/vp9_onyx_int.h"
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#include "vp9/encoder/vp9_quantize.h"
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#include "vp9/encoder/vp9_ratectrl.h"
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#include "vp9/encoder/vp9_rdopt.h"
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#include "vp9/encoder/vp9_vaq.h"
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#include "vp9/encoder/vp9_variance.h"
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#define OUTPUT_FPF 0
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#define IIFACTOR 12.5
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#define IIKFACTOR1 12.5
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#define IIKFACTOR2 15.0
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#define RMAX 512.0
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#define GF_RMAX 96.0
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#define ERR_DIVISOR 150.0
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#define MIN_DECAY_FACTOR 0.1
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#define KF_MB_INTRA_MIN 150
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#define GF_MB_INTRA_MIN 100
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#define DOUBLE_DIVIDE_CHECK(x) ((x) < 0 ? (x) - 0.000001 : (x) + 0.000001)
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#define MIN_KF_BOOST 300
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#define DISABLE_RC_LONG_TERM_MEM 0
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static void swap_yv12(YV12_BUFFER_CONFIG *a, YV12_BUFFER_CONFIG *b) {
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YV12_BUFFER_CONFIG temp = *a;
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*a = *b;
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*b = temp;
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}
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static int select_cq_level(int qindex) {
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int ret_val = QINDEX_RANGE - 1;
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int i;
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double target_q = (vp9_convert_qindex_to_q(qindex) * 0.5847) + 1.0;
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for (i = 0; i < QINDEX_RANGE; ++i) {
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if (target_q <= vp9_convert_qindex_to_q(i)) {
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ret_val = i;
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break;
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}
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}
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return ret_val;
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}
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static int gfboost_qadjust(int qindex) {
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const double q = vp9_convert_qindex_to_q(qindex);
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return (int)((0.00000828 * q * q * q) +
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(-0.0055 * q * q) +
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(1.32 * q) + 79.3);
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}
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static int kfboost_qadjust(int qindex) {
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const double q = vp9_convert_qindex_to_q(qindex);
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return (int)((0.00000973 * q * q * q) +
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(-0.00613 * q * q) +
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(1.316 * q) + 121.2);
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}
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// Resets the first pass file to the given position using a relative seek from
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// the current position.
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static void reset_fpf_position(struct twopass_rc *p,
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const FIRSTPASS_STATS *position) {
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p->stats_in = position;
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}
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static int lookup_next_frame_stats(const struct twopass_rc *p,
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FIRSTPASS_STATS *next_frame) {
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if (p->stats_in >= p->stats_in_end)
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return EOF;
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*next_frame = *p->stats_in;
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return 1;
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}
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// Read frame stats at an offset from the current position.
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static int read_frame_stats(const struct twopass_rc *p,
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FIRSTPASS_STATS *frame_stats, int offset) {
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const FIRSTPASS_STATS *fps_ptr = p->stats_in;
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// Check legality of offset.
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if (offset >= 0) {
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if (&fps_ptr[offset] >= p->stats_in_end)
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return EOF;
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} else if (offset < 0) {
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if (&fps_ptr[offset] < p->stats_in_start)
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return EOF;
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}
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*frame_stats = fps_ptr[offset];
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return 1;
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}
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static int input_stats(struct twopass_rc *p, FIRSTPASS_STATS *fps) {
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if (p->stats_in >= p->stats_in_end)
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return EOF;
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*fps = *p->stats_in;
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++p->stats_in;
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return 1;
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}
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static void output_stats(FIRSTPASS_STATS *stats,
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struct vpx_codec_pkt_list *pktlist) {
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struct vpx_codec_cx_pkt pkt;
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pkt.kind = VPX_CODEC_STATS_PKT;
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pkt.data.twopass_stats.buf = stats;
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pkt.data.twopass_stats.sz = sizeof(FIRSTPASS_STATS);
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vpx_codec_pkt_list_add(pktlist, &pkt);
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// TEMP debug code
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#if OUTPUT_FPF
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{
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FILE *fpfile;
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fpfile = fopen("firstpass.stt", "a");
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fprintf(fpfile, "%12.0f %12.0f %12.0f %12.0f %12.0f %12.4f %12.4f"
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"%12.4f %12.4f %12.4f %12.4f %12.4f %12.4f %12.4f"
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"%12.0f %12.0f %12.4f %12.0f %12.0f %12.4f\n",
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stats->frame,
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stats->intra_error,
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stats->coded_error,
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stats->sr_coded_error,
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stats->ssim_weighted_pred_err,
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stats->pcnt_inter,
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stats->pcnt_motion,
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stats->pcnt_second_ref,
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stats->pcnt_neutral,
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stats->MVr,
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stats->mvr_abs,
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stats->MVc,
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stats->mvc_abs,
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stats->MVrv,
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stats->MVcv,
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stats->mv_in_out_count,
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stats->new_mv_count,
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stats->count,
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stats->duration);
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fclose(fpfile);
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}
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#endif
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}
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static void zero_stats(FIRSTPASS_STATS *section) {
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section->frame = 0.0;
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section->intra_error = 0.0;
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section->coded_error = 0.0;
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section->sr_coded_error = 0.0;
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section->ssim_weighted_pred_err = 0.0;
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section->pcnt_inter = 0.0;
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section->pcnt_motion = 0.0;
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section->pcnt_second_ref = 0.0;
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section->pcnt_neutral = 0.0;
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section->MVr = 0.0;
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section->mvr_abs = 0.0;
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section->MVc = 0.0;
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section->mvc_abs = 0.0;
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section->MVrv = 0.0;
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section->MVcv = 0.0;
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section->mv_in_out_count = 0.0;
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section->new_mv_count = 0.0;
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section->count = 0.0;
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section->duration = 1.0;
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}
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static void accumulate_stats(FIRSTPASS_STATS *section,
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const FIRSTPASS_STATS *frame) {
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section->frame += frame->frame;
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section->intra_error += frame->intra_error;
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section->coded_error += frame->coded_error;
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section->sr_coded_error += frame->sr_coded_error;
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section->ssim_weighted_pred_err += frame->ssim_weighted_pred_err;
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section->pcnt_inter += frame->pcnt_inter;
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section->pcnt_motion += frame->pcnt_motion;
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section->pcnt_second_ref += frame->pcnt_second_ref;
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section->pcnt_neutral += frame->pcnt_neutral;
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section->MVr += frame->MVr;
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section->mvr_abs += frame->mvr_abs;
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section->MVc += frame->MVc;
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section->mvc_abs += frame->mvc_abs;
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section->MVrv += frame->MVrv;
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section->MVcv += frame->MVcv;
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section->mv_in_out_count += frame->mv_in_out_count;
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section->new_mv_count += frame->new_mv_count;
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section->count += frame->count;
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section->duration += frame->duration;
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}
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static void subtract_stats(FIRSTPASS_STATS *section,
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const FIRSTPASS_STATS *frame) {
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section->frame -= frame->frame;
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section->intra_error -= frame->intra_error;
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section->coded_error -= frame->coded_error;
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section->sr_coded_error -= frame->sr_coded_error;
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section->ssim_weighted_pred_err -= frame->ssim_weighted_pred_err;
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section->pcnt_inter -= frame->pcnt_inter;
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section->pcnt_motion -= frame->pcnt_motion;
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section->pcnt_second_ref -= frame->pcnt_second_ref;
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section->pcnt_neutral -= frame->pcnt_neutral;
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section->MVr -= frame->MVr;
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section->mvr_abs -= frame->mvr_abs;
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section->MVc -= frame->MVc;
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section->mvc_abs -= frame->mvc_abs;
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section->MVrv -= frame->MVrv;
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section->MVcv -= frame->MVcv;
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section->mv_in_out_count -= frame->mv_in_out_count;
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section->new_mv_count -= frame->new_mv_count;
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section->count -= frame->count;
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section->duration -= frame->duration;
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}
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static void avg_stats(FIRSTPASS_STATS *section) {
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if (section->count < 1.0)
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return;
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section->intra_error /= section->count;
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section->coded_error /= section->count;
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section->sr_coded_error /= section->count;
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section->ssim_weighted_pred_err /= section->count;
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section->pcnt_inter /= section->count;
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section->pcnt_second_ref /= section->count;
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section->pcnt_neutral /= section->count;
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section->pcnt_motion /= section->count;
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section->MVr /= section->count;
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section->mvr_abs /= section->count;
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section->MVc /= section->count;
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section->mvc_abs /= section->count;
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section->MVrv /= section->count;
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section->MVcv /= section->count;
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section->mv_in_out_count /= section->count;
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section->duration /= section->count;
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}
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// Calculate a modified Error used in distributing bits between easier and
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// harder frames.
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static double calculate_modified_err(const VP9_COMP *cpi,
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const FIRSTPASS_STATS *this_frame) {
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const struct twopass_rc *const twopass = &cpi->twopass;
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const FIRSTPASS_STATS *const stats = &twopass->total_stats;
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const double av_err = stats->ssim_weighted_pred_err / stats->count;
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double modified_error = av_err * pow(this_frame->ssim_weighted_pred_err /
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DOUBLE_DIVIDE_CHECK(av_err),
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cpi->oxcf.two_pass_vbrbias / 100.0);
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return fclamp(modified_error,
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twopass->modified_error_min, twopass->modified_error_max);
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}
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static const double weight_table[256] = {
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0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000,
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0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000,
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0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000,
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0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.020000,
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0.020000, 0.020000, 0.020000, 0.020000, 0.020000, 0.031250, 0.062500,
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0.093750, 0.125000, 0.156250, 0.187500, 0.218750, 0.250000, 0.281250,
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0.312500, 0.343750, 0.375000, 0.406250, 0.437500, 0.468750, 0.500000,
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0.531250, 0.562500, 0.593750, 0.625000, 0.656250, 0.687500, 0.718750,
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0.750000, 0.781250, 0.812500, 0.843750, 0.875000, 0.906250, 0.937500,
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0.968750, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000, 1.000000,
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1.000000, 1.000000, 1.000000, 1.000000
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};
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static double simple_weight(const YV12_BUFFER_CONFIG *buf) {
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int i, j;
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double sum = 0.0;
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const int w = buf->y_crop_width;
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const int h = buf->y_crop_height;
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const uint8_t *row = buf->y_buffer;
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for (i = 0; i < h; ++i) {
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const uint8_t *pixel = row;
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for (j = 0; j < w; ++j)
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sum += weight_table[*pixel++];
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row += buf->y_stride;
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}
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return MAX(0.1, sum / (w * h));
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}
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// This function returns the maximum target rate per frame.
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static int frame_max_bits(const VP9_COMP *cpi) {
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int64_t max_bits =
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((int64_t)cpi->rc.av_per_frame_bandwidth *
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(int64_t)cpi->oxcf.two_pass_vbrmax_section) / 100;
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if (max_bits < 0)
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max_bits = 0;
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else if (max_bits > cpi->rc.max_frame_bandwidth)
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max_bits = cpi->rc.max_frame_bandwidth;
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return (int)max_bits;
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}
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void vp9_init_first_pass(VP9_COMP *cpi) {
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zero_stats(&cpi->twopass.total_stats);
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}
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void vp9_end_first_pass(VP9_COMP *cpi) {
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output_stats(&cpi->twopass.total_stats, cpi->output_pkt_list);
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}
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static vp9_variance_fn_t get_block_variance_fn(BLOCK_SIZE bsize) {
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switch (bsize) {
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case BLOCK_8X8:
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return vp9_mse8x8;
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case BLOCK_16X8:
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return vp9_mse16x8;
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case BLOCK_8X16:
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return vp9_mse8x16;
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default:
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return vp9_mse16x16;
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}
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}
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static unsigned int zz_motion_search(const MACROBLOCK *x) {
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const MACROBLOCKD *const xd = &x->e_mbd;
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const uint8_t *const src = x->plane[0].src.buf;
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const int src_stride = x->plane[0].src.stride;
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const uint8_t *const ref = xd->plane[0].pre[0].buf;
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const int ref_stride = xd->plane[0].pre[0].stride;
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unsigned int sse;
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vp9_variance_fn_t fn = get_block_variance_fn(xd->mi_8x8[0]->mbmi.sb_type);
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fn(src, src_stride, ref, ref_stride, &sse);
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return sse;
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}
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static void first_pass_motion_search(VP9_COMP *cpi, MACROBLOCK *x,
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const MV *ref_mv, MV *best_mv,
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int *best_motion_err) {
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MACROBLOCKD *const xd = &x->e_mbd;
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MV tmp_mv = {0, 0};
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MV ref_mv_full = {ref_mv->row >> 3, ref_mv->col >> 3};
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int num00, tmp_err, n, sr = 0;
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int step_param = 3;
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int further_steps = (MAX_MVSEARCH_STEPS - 1) - step_param;
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const BLOCK_SIZE bsize = xd->mi_8x8[0]->mbmi.sb_type;
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vp9_variance_fn_ptr_t v_fn_ptr = cpi->fn_ptr[bsize];
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int new_mv_mode_penalty = 256;
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const int quart_frm = MIN(cpi->common.width, cpi->common.height);
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// Refine the motion search range according to the frame dimension
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// for first pass test.
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while ((quart_frm << sr) < MAX_FULL_PEL_VAL)
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++sr;
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step_param += sr;
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further_steps -= sr;
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// Override the default variance function to use MSE.
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v_fn_ptr.vf = get_block_variance_fn(bsize);
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|
|
// Center the initial step/diamond search on best mv.
|
|
tmp_err = cpi->diamond_search_sad(x, &ref_mv_full, &tmp_mv,
|
|
step_param,
|
|
x->sadperbit16, &num00, &v_fn_ptr,
|
|
x->nmvjointcost,
|
|
x->mvcost, ref_mv);
|
|
if (tmp_err < INT_MAX)
|
|
tmp_err = vp9_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->row = tmp_mv.row;
|
|
best_mv->col = tmp_mv.col;
|
|
}
|
|
|
|
// 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, &ref_mv_full, &tmp_mv,
|
|
step_param + n, x->sadperbit16,
|
|
&num00, &v_fn_ptr,
|
|
x->nmvjointcost,
|
|
x->mvcost, ref_mv);
|
|
if (tmp_err < INT_MAX)
|
|
tmp_err = vp9_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->row = tmp_mv.row;
|
|
best_mv->col = tmp_mv.col;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static BLOCK_SIZE get_bsize(const VP9_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;
|
|
}
|
|
}
|
|
|
|
void vp9_first_pass(VP9_COMP *cpi) {
|
|
int mb_row, mb_col;
|
|
MACROBLOCK *const x = &cpi->mb;
|
|
VP9_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 = &x->sb64_context;
|
|
int i;
|
|
|
|
int recon_yoffset, recon_uvoffset;
|
|
YV12_BUFFER_CONFIG *const lst_yv12 = get_ref_frame_buffer(cpi, LAST_FRAME);
|
|
YV12_BUFFER_CONFIG *const gld_yv12 = get_ref_frame_buffer(cpi, GOLDEN_FRAME);
|
|
YV12_BUFFER_CONFIG *const new_yv12 = get_frame_new_buffer(cm);
|
|
const int recon_y_stride = lst_yv12->y_stride;
|
|
const int recon_uv_stride = lst_yv12->uv_stride;
|
|
const int uv_mb_height = 16 >> (lst_yv12->y_height > lst_yv12->uv_height);
|
|
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;
|
|
int intrapenalty = 256;
|
|
int neutral_count = 0;
|
|
int new_mv_count = 0;
|
|
int sum_in_vectors = 0;
|
|
uint32_t lastmv_as_int = 0;
|
|
struct twopass_rc *const twopass = &cpi->twopass;
|
|
const MV zero_mv = {0, 0};
|
|
|
|
vp9_clear_system_state();
|
|
|
|
vp9_setup_src_planes(x, cpi->Source, 0, 0);
|
|
vp9_setup_pre_planes(xd, 0, lst_yv12, 0, 0, NULL);
|
|
vp9_setup_dst_planes(xd, new_yv12, 0, 0);
|
|
|
|
xd->mi_8x8 = cm->mi_grid_visible;
|
|
xd->mi_8x8[0] = cm->mi;
|
|
|
|
vp9_setup_block_planes(&x->e_mbd, cm->subsampling_x, cm->subsampling_y);
|
|
|
|
vp9_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;
|
|
|
|
vp9_init_mv_probs(cm);
|
|
vp9_initialize_rd_consts(cpi);
|
|
|
|
// Tiling is ignored in the first pass.
|
|
vp9_tile_init(&tile, cm, 0, 0);
|
|
|
|
for (mb_row = 0; mb_row < cm->mb_rows; ++mb_row) {
|
|
int_mv best_ref_mv;
|
|
|
|
best_ref_mv.as_int = 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);
|
|
double error_weight = 1.0;
|
|
const BLOCK_SIZE bsize = get_bsize(cm, mb_row, mb_col);
|
|
|
|
vp9_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_8x8[0]->mbmi.sb_type = bsize;
|
|
xd->mi_8x8[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);
|
|
|
|
if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
|
|
const int energy = vp9_block_energy(cpi, x, bsize);
|
|
error_weight = vp9_vaq_inv_q_ratio(energy);
|
|
}
|
|
|
|
// Do intra 16x16 prediction.
|
|
this_error = vp9_encode_intra(x, use_dc_pred);
|
|
if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
|
|
vp9_clear_system_state();
|
|
this_error = (int)(this_error * error_weight);
|
|
}
|
|
|
|
// 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;
|
|
|
|
// 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;
|
|
int_mv mv, tmp_mv;
|
|
|
|
xd->plane[0].pre[0].buf = lst_yv12->y_buffer + recon_yoffset;
|
|
motion_error = zz_motion_search(x);
|
|
// Assume 0,0 motion with no mv overhead.
|
|
mv.as_int = tmp_mv.as_int = 0;
|
|
|
|
// 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.as_mv, &mv.as_mv,
|
|
&motion_error);
|
|
if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
|
|
vp9_clear_system_state();
|
|
motion_error = (int)(motion_error * error_weight);
|
|
}
|
|
|
|
// If the current best reference mv is not centered on 0,0 then do a 0,0
|
|
// based search as well.
|
|
if (best_ref_mv.as_int) {
|
|
tmp_err = INT_MAX;
|
|
first_pass_motion_search(cpi, x, &zero_mv, &tmp_mv.as_mv,
|
|
&tmp_err);
|
|
if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
|
|
vp9_clear_system_state();
|
|
tmp_err = (int)(tmp_err * error_weight);
|
|
}
|
|
|
|
if (tmp_err < motion_error) {
|
|
motion_error = tmp_err;
|
|
mv.as_int = tmp_mv.as_int;
|
|
}
|
|
}
|
|
|
|
// Search in an older reference frame.
|
|
if (cm->current_video_frame > 1) {
|
|
// Assume 0,0 motion with no mv overhead.
|
|
int gf_motion_error;
|
|
|
|
xd->plane[0].pre[0].buf = gld_yv12->y_buffer + recon_yoffset;
|
|
gf_motion_error = zz_motion_search(x);
|
|
|
|
first_pass_motion_search(cpi, x, &zero_mv, &tmp_mv.as_mv,
|
|
&gf_motion_error);
|
|
if (cpi->oxcf.aq_mode == VARIANCE_AQ) {
|
|
vp9_clear_system_state();
|
|
gf_motion_error = (int)(gf_motion_error * error_weight);
|
|
}
|
|
|
|
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 = lst_yv12->y_buffer + recon_yoffset;
|
|
xd->plane[1].pre[0].buf = lst_yv12->u_buffer + recon_uvoffset;
|
|
xd->plane[2].pre[0].buf = lst_yv12->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;
|
|
}
|
|
// Start by assuming that intra mode is best.
|
|
best_ref_mv.as_int = 0;
|
|
|
|
if (motion_error <= this_error) {
|
|
// 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;
|
|
|
|
mv.as_mv.row *= 8;
|
|
mv.as_mv.col *= 8;
|
|
this_error = motion_error;
|
|
xd->mi_8x8[0]->mbmi.mode = NEWMV;
|
|
xd->mi_8x8[0]->mbmi.mv[0] = mv;
|
|
xd->mi_8x8[0]->mbmi.tx_size = TX_4X4;
|
|
xd->mi_8x8[0]->mbmi.ref_frame[0] = LAST_FRAME;
|
|
xd->mi_8x8[0]->mbmi.ref_frame[1] = NONE;
|
|
vp9_build_inter_predictors_sby(xd, mb_row << 1, mb_col << 1, bsize);
|
|
vp9_encode_sby_pass1(x, bsize);
|
|
sum_mvr += mv.as_mv.row;
|
|
sum_mvr_abs += abs(mv.as_mv.row);
|
|
sum_mvc += mv.as_mv.col;
|
|
sum_mvc_abs += abs(mv.as_mv.col);
|
|
sum_mvrs += mv.as_mv.row * mv.as_mv.row;
|
|
sum_mvcs += mv.as_mv.col * mv.as_mv.col;
|
|
++intercount;
|
|
|
|
best_ref_mv.as_int = mv.as_int;
|
|
|
|
if (mv.as_int) {
|
|
++mvcount;
|
|
|
|
// Non-zero vector, was it different from the last non zero vector?
|
|
if (mv.as_int != lastmv_as_int)
|
|
++new_mv_count;
|
|
lastmv_as_int = mv.as_int;
|
|
|
|
// Does the row vector point inwards or outwards?
|
|
if (mb_row < cm->mb_rows / 2) {
|
|
if (mv.as_mv.row > 0)
|
|
--sum_in_vectors;
|
|
else if (mv.as_mv.row < 0)
|
|
++sum_in_vectors;
|
|
} else if (mb_row > cm->mb_rows / 2) {
|
|
if (mv.as_mv.row > 0)
|
|
++sum_in_vectors;
|
|
else if (mv.as_mv.row < 0)
|
|
--sum_in_vectors;
|
|
}
|
|
|
|
// Does the col vector point inwards or outwards?
|
|
if (mb_col < cm->mb_cols / 2) {
|
|
if (mv.as_mv.col > 0)
|
|
--sum_in_vectors;
|
|
else if (mv.as_mv.col < 0)
|
|
++sum_in_vectors;
|
|
} else if (mb_col > cm->mb_cols / 2) {
|
|
if (mv.as_mv.col > 0)
|
|
++sum_in_vectors;
|
|
else if (mv.as_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;
|
|
|
|
vp9_clear_system_state();
|
|
}
|
|
|
|
vp9_clear_system_state();
|
|
{
|
|
FIRSTPASS_STATS fps;
|
|
|
|
fps.frame = cm->current_video_frame;
|
|
fps.intra_error = (double)(intra_error >> 8);
|
|
fps.coded_error = (double)(coded_error >> 8);
|
|
fps.sr_coded_error = (double)(sr_coded_error >> 8);
|
|
fps.ssim_weighted_pred_err = fps.coded_error * simple_weight(cpi->Source);
|
|
fps.count = 1.0;
|
|
fps.pcnt_inter = (double)intercount / cm->MBs;
|
|
fps.pcnt_second_ref = (double)second_ref_count / cm->MBs;
|
|
fps.pcnt_neutral = (double)neutral_count / cm->MBs;
|
|
|
|
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 - (fps.MVr * fps.MVr / mvcount)) / mvcount;
|
|
fps.MVcv = ((double)sum_mvcs - (fps.MVc * fps.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 / cm->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)(cpi->source->ts_end - cpi->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);
|
|
}
|
|
|
|
// 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))) {
|
|
vp8_yv12_copy_frame(lst_yv12, gld_yv12);
|
|
twopass->sr_update_lag = 1;
|
|
} else {
|
|
++twopass->sr_update_lag;
|
|
}
|
|
// Swap frame pointers so last frame refers to the frame we just compressed.
|
|
swap_yv12(lst_yv12, new_yv12);
|
|
|
|
vp9_extend_frame_borders(lst_yv12);
|
|
|
|
// Special case for the first frame. Copy into the GF buffer as a second
|
|
// reference.
|
|
if (cm->current_video_frame == 0)
|
|
vp8_yv12_copy_frame(lst_yv12, gld_yv12);
|
|
|
|
// 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;
|
|
}
|
|
|
|
// Estimate a cost per mb attributable to overheads such as the coding of modes
|
|
// and motion vectors. This currently makes simplistic assumptions for testing.
|
|
static double bitcost(double prob) {
|
|
return -(log(prob) / log(2.0));
|
|
}
|
|
|
|
static double calc_correction_factor(double err_per_mb,
|
|
double err_divisor,
|
|
double pt_low,
|
|
double pt_high,
|
|
int q) {
|
|
const double error_term = err_per_mb / err_divisor;
|
|
|
|
// Adjustment based on actual quantizer to power term.
|
|
const double power_term = MIN(vp9_convert_qindex_to_q(q) * 0.0125 + 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);
|
|
}
|
|
|
|
int vp9_twopass_worst_quality(VP9_COMP *cpi, FIRSTPASS_STATS *fpstats,
|
|
int section_target_bandwitdh) {
|
|
int q;
|
|
const int num_mbs = cpi->common.MBs;
|
|
int target_norm_bits_per_mb;
|
|
const RATE_CONTROL *const rc = &cpi->rc;
|
|
|
|
const double section_err = fpstats->coded_error / fpstats->count;
|
|
const double err_per_mb = section_err / num_mbs;
|
|
|
|
if (section_target_bandwitdh <= 0)
|
|
return rc->worst_quality; // Highest value allowed
|
|
|
|
target_norm_bits_per_mb = section_target_bandwitdh < (1 << 20)
|
|
? (512 * section_target_bandwitdh) / num_mbs
|
|
: 512 * (section_target_bandwitdh / num_mbs);
|
|
|
|
// 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 err_correction_factor = calc_correction_factor(err_per_mb,
|
|
ERR_DIVISOR, 0.5, 0.90, q);
|
|
const int bits_per_mb_at_this_q = vp9_rc_bits_per_mb(INTER_FRAME, q,
|
|
err_correction_factor);
|
|
if (bits_per_mb_at_this_q <= target_norm_bits_per_mb)
|
|
break;
|
|
}
|
|
|
|
// Restriction on active max q for constrained quality mode.
|
|
if (cpi->oxcf.end_usage == USAGE_CONSTRAINED_QUALITY)
|
|
q = MAX(q, cpi->cq_target_quality);
|
|
|
|
return q;
|
|
}
|
|
|
|
extern void vp9_new_framerate(VP9_COMP *cpi, double framerate);
|
|
|
|
void vp9_init_second_pass(VP9_COMP *cpi) {
|
|
FIRSTPASS_STATS this_frame;
|
|
const FIRSTPASS_STATS *start_pos;
|
|
struct twopass_rc *const twopass = &cpi->twopass;
|
|
const VP9_CONFIG *const oxcf = &cpi->oxcf;
|
|
|
|
zero_stats(&twopass->total_stats);
|
|
zero_stats(&twopass->total_left_stats);
|
|
|
|
if (!twopass->stats_in_end)
|
|
return;
|
|
|
|
twopass->total_stats = *twopass->stats_in_end;
|
|
twopass->total_left_stats = twopass->total_stats;
|
|
|
|
// 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.
|
|
vp9_new_framerate(cpi, 10000000.0 * twopass->total_stats.count /
|
|
twopass->total_stats.duration);
|
|
|
|
cpi->output_framerate = oxcf->framerate;
|
|
twopass->bits_left = (int64_t)(twopass->total_stats.duration *
|
|
oxcf->target_bandwidth / 10000000.0);
|
|
|
|
// Calculate a minimum intra value to be used in determining the IIratio
|
|
// scores used in the second pass. We have this minimum to make sure
|
|
// that clips that are static but "low complexity" in the intra domain
|
|
// are still boosted appropriately for KF/GF/ARF.
|
|
twopass->kf_intra_err_min = KF_MB_INTRA_MIN * cpi->common.MBs;
|
|
twopass->gf_intra_err_min = GF_MB_INTRA_MIN * cpi->common.MBs;
|
|
|
|
// This variable monitors how far behind the second ref update is lagging.
|
|
twopass->sr_update_lag = 1;
|
|
|
|
// Scan the first pass file and calculate an average Intra / Inter error score
|
|
// ratio for the sequence.
|
|
{
|
|
double sum_iiratio = 0.0;
|
|
start_pos = twopass->stats_in;
|
|
|
|
while (input_stats(twopass, &this_frame) != EOF) {
|
|
const double iiratio = this_frame.intra_error /
|
|
DOUBLE_DIVIDE_CHECK(this_frame.coded_error);
|
|
sum_iiratio += fclamp(iiratio, 1.0, 20.0);
|
|
}
|
|
|
|
twopass->avg_iiratio = sum_iiratio /
|
|
DOUBLE_DIVIDE_CHECK((double)twopass->total_stats.count);
|
|
|
|
reset_fpf_position(twopass, start_pos);
|
|
}
|
|
|
|
// Scan the first pass file and calculate a modified total error based upon
|
|
// the bias/power function used to allocate bits.
|
|
{
|
|
double av_error = twopass->total_stats.ssim_weighted_pred_err /
|
|
DOUBLE_DIVIDE_CHECK(twopass->total_stats.count);
|
|
|
|
start_pos = twopass->stats_in;
|
|
|
|
twopass->modified_error_total = 0.0;
|
|
twopass->modified_error_min =
|
|
(av_error * oxcf->two_pass_vbrmin_section) / 100;
|
|
twopass->modified_error_max =
|
|
(av_error * oxcf->two_pass_vbrmax_section) / 100;
|
|
|
|
while (input_stats(twopass, &this_frame) != EOF) {
|
|
twopass->modified_error_total +=
|
|
calculate_modified_err(cpi, &this_frame);
|
|
}
|
|
twopass->modified_error_left = twopass->modified_error_total;
|
|
|
|
reset_fpf_position(twopass, start_pos);
|
|
}
|
|
}
|
|
|
|
// This function gives an estimate of how badly we believe the prediction
|
|
// quality is decaying from frame to frame.
|
|
static double get_prediction_decay_rate(const VP9_COMMON *cm,
|
|
const FIRSTPASS_STATS *next_frame) {
|
|
// Look at the observed drop in prediction quality between the last frame
|
|
// and the GF buffer (which contains an older frame).
|
|
const double mb_sr_err_diff = (next_frame->sr_coded_error -
|
|
next_frame->coded_error) / cm->MBs;
|
|
const double second_ref_decay = mb_sr_err_diff <= 512.0
|
|
? fclamp(pow(1.0 - (mb_sr_err_diff / 512.0), 0.5), 0.85, 1.0)
|
|
: 0.85;
|
|
|
|
return MIN(second_ref_decay, next_frame->pcnt_inter);
|
|
}
|
|
|
|
// 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(VP9_COMP *cpi, int frame_interval,
|
|
int still_interval,
|
|
double loop_decay_rate,
|
|
double last_decay_rate) {
|
|
int trans_to_still = 0;
|
|
|
|
// 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 > MIN_GF_INTERVAL &&
|
|
loop_decay_rate >= 0.999 &&
|
|
last_decay_rate < 0.9) {
|
|
int j;
|
|
const FIRSTPASS_STATS *position = cpi->twopass.stats_in;
|
|
FIRSTPASS_STATS tmp_next_frame;
|
|
|
|
// Look ahead a few frames to see if static condition persists...
|
|
for (j = 0; j < still_interval; ++j) {
|
|
if (EOF == input_stats(&cpi->twopass, &tmp_next_frame))
|
|
break;
|
|
|
|
if (tmp_next_frame.pcnt_inter - tmp_next_frame.pcnt_motion < 0.999)
|
|
break;
|
|
}
|
|
|
|
reset_fpf_position(&cpi->twopass, position);
|
|
|
|
// Only if it does do we signal a transition to still.
|
|
if (j == still_interval)
|
|
trans_to_still = 1;
|
|
}
|
|
|
|
return trans_to_still;
|
|
}
|
|
|
|
// 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 struct twopass_rc *twopass, int offset) {
|
|
FIRSTPASS_STATS next_frame;
|
|
|
|
int flash_detected = 0;
|
|
|
|
// Read the frame data.
|
|
// The return is FALSE (no flash detected) if not a valid frame
|
|
if (read_frame_stats(twopass, &next_frame, offset) != EOF) {
|
|
// 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.
|
|
if (next_frame.pcnt_second_ref > next_frame.pcnt_inter &&
|
|
next_frame.pcnt_second_ref >= 0.5)
|
|
flash_detected = 1;
|
|
}
|
|
|
|
return flash_detected;
|
|
}
|
|
|
|
// Update the motion related elements to the GF arf boost calculation.
|
|
static void accumulate_frame_motion_stats(
|
|
FIRSTPASS_STATS *this_frame,
|
|
double *this_frame_mv_in_out,
|
|
double *mv_in_out_accumulator,
|
|
double *abs_mv_in_out_accumulator,
|
|
double *mv_ratio_accumulator) {
|
|
double motion_pct;
|
|
|
|
// Accumulate motion stats.
|
|
motion_pct = this_frame->pcnt_motion;
|
|
|
|
// Accumulate Motion In/Out of frame stats.
|
|
*this_frame_mv_in_out = this_frame->mv_in_out_count * motion_pct;
|
|
*mv_in_out_accumulator += this_frame->mv_in_out_count * motion_pct;
|
|
*abs_mv_in_out_accumulator += fabs(this_frame->mv_in_out_count * motion_pct);
|
|
|
|
// Accumulate a measure of how uniform (or conversely how random)
|
|
// the motion field is (a ratio of absmv / mv).
|
|
if (motion_pct > 0.05) {
|
|
const double this_frame_mvr_ratio = fabs(this_frame->mvr_abs) /
|
|
DOUBLE_DIVIDE_CHECK(fabs(this_frame->MVr));
|
|
|
|
const double this_frame_mvc_ratio = fabs(this_frame->mvc_abs) /
|
|
DOUBLE_DIVIDE_CHECK(fabs(this_frame->MVc));
|
|
|
|
*mv_ratio_accumulator += (this_frame_mvr_ratio < this_frame->mvr_abs)
|
|
? (this_frame_mvr_ratio * motion_pct)
|
|
: this_frame->mvr_abs * motion_pct;
|
|
|
|
*mv_ratio_accumulator += (this_frame_mvc_ratio < this_frame->mvc_abs)
|
|
? (this_frame_mvc_ratio * motion_pct)
|
|
: this_frame->mvc_abs * motion_pct;
|
|
}
|
|
}
|
|
|
|
// Calculate a baseline boost number for the current frame.
|
|
static double calc_frame_boost(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame,
|
|
double this_frame_mv_in_out) {
|
|
double frame_boost;
|
|
|
|
// Underlying boost factor is based on inter intra error ratio.
|
|
if (this_frame->intra_error > cpi->twopass.gf_intra_err_min)
|
|
frame_boost = (IIFACTOR * this_frame->intra_error /
|
|
DOUBLE_DIVIDE_CHECK(this_frame->coded_error));
|
|
else
|
|
frame_boost = (IIFACTOR * cpi->twopass.gf_intra_err_min /
|
|
DOUBLE_DIVIDE_CHECK(this_frame->coded_error));
|
|
|
|
// 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 MIN(frame_boost, GF_RMAX);
|
|
}
|
|
|
|
static int calc_arf_boost(VP9_COMP *cpi, int offset,
|
|
int f_frames, int b_frames,
|
|
int *f_boost, int *b_boost) {
|
|
FIRSTPASS_STATS this_frame;
|
|
struct twopass_rc *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) {
|
|
if (read_frame_stats(twopass, &this_frame, (i + offset)) == EOF)
|
|
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->common, &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));
|
|
}
|
|
|
|
*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) {
|
|
if (read_frame_stats(twopass, &this_frame, (i + offset)) == EOF)
|
|
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->common, &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));
|
|
}
|
|
*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);
|
|
|
|
return arf_boost;
|
|
}
|
|
|
|
#if CONFIG_MULTIPLE_ARF
|
|
// Work out the frame coding order for a GF or an ARF group.
|
|
// The current implementation codes frames in their natural order for a
|
|
// GF group, and inserts additional ARFs into an ARF group using a
|
|
// binary split approach.
|
|
// NOTE: this function is currently implemented recursively.
|
|
static void schedule_frames(VP9_COMP *cpi, const int start, const int end,
|
|
const int arf_idx, const int gf_or_arf_group,
|
|
const int level) {
|
|
int i, abs_end, half_range;
|
|
int *cfo = cpi->frame_coding_order;
|
|
int idx = cpi->new_frame_coding_order_period;
|
|
|
|
// If (end < 0) an ARF should be coded at position (-end).
|
|
assert(start >= 0);
|
|
|
|
// printf("start:%d end:%d\n", start, end);
|
|
|
|
// GF Group: code frames in logical order.
|
|
if (gf_or_arf_group == 0) {
|
|
assert(end >= start);
|
|
for (i = start; i <= end; ++i) {
|
|
cfo[idx] = i;
|
|
cpi->arf_buffer_idx[idx] = arf_idx;
|
|
cpi->arf_weight[idx] = -1;
|
|
++idx;
|
|
}
|
|
cpi->new_frame_coding_order_period = idx;
|
|
return;
|
|
}
|
|
|
|
// ARF Group: Work out the ARF schedule and mark ARF frames as negative.
|
|
if (end < 0) {
|
|
// printf("start:%d end:%d\n", -end, -end);
|
|
// ARF frame is at the end of the range.
|
|
cfo[idx] = end;
|
|
// What ARF buffer does this ARF use as predictor.
|
|
cpi->arf_buffer_idx[idx] = (arf_idx > 2) ? (arf_idx - 1) : 2;
|
|
cpi->arf_weight[idx] = level;
|
|
++idx;
|
|
abs_end = -end;
|
|
} else {
|
|
abs_end = end;
|
|
}
|
|
|
|
half_range = (abs_end - start) >> 1;
|
|
|
|
// ARFs may not be adjacent, they must be separated by at least
|
|
// MIN_GF_INTERVAL non-ARF frames.
|
|
if ((start + MIN_GF_INTERVAL) >= (abs_end - MIN_GF_INTERVAL)) {
|
|
// printf("start:%d end:%d\n", start, abs_end);
|
|
// Update the coding order and active ARF.
|
|
for (i = start; i <= abs_end; ++i) {
|
|
cfo[idx] = i;
|
|
cpi->arf_buffer_idx[idx] = arf_idx;
|
|
cpi->arf_weight[idx] = -1;
|
|
++idx;
|
|
}
|
|
cpi->new_frame_coding_order_period = idx;
|
|
} else {
|
|
// Place a new ARF at the mid-point of the range.
|
|
cpi->new_frame_coding_order_period = idx;
|
|
schedule_frames(cpi, start, -(start + half_range), arf_idx + 1,
|
|
gf_or_arf_group, level + 1);
|
|
schedule_frames(cpi, start + half_range + 1, abs_end, arf_idx,
|
|
gf_or_arf_group, level + 1);
|
|
}
|
|
}
|
|
|
|
#define FIXED_ARF_GROUP_SIZE 16
|
|
|
|
void define_fixed_arf_period(VP9_COMP *cpi) {
|
|
int i;
|
|
int max_level = INT_MIN;
|
|
|
|
assert(cpi->multi_arf_enabled);
|
|
assert(cpi->oxcf.lag_in_frames >= FIXED_ARF_GROUP_SIZE);
|
|
|
|
// Save the weight of the last frame in the sequence before next
|
|
// sequence pattern overwrites it.
|
|
cpi->this_frame_weight = cpi->arf_weight[cpi->sequence_number];
|
|
assert(cpi->this_frame_weight >= 0);
|
|
|
|
cpi->twopass.gf_zeromotion_pct = 0;
|
|
|
|
// Initialize frame coding order variables.
|
|
cpi->new_frame_coding_order_period = 0;
|
|
cpi->next_frame_in_order = 0;
|
|
cpi->arf_buffered = 0;
|
|
vp9_zero(cpi->frame_coding_order);
|
|
vp9_zero(cpi->arf_buffer_idx);
|
|
vpx_memset(cpi->arf_weight, -1, sizeof(cpi->arf_weight));
|
|
|
|
if (cpi->rc.frames_to_key <= (FIXED_ARF_GROUP_SIZE + 8)) {
|
|
// Setup a GF group close to the keyframe.
|
|
cpi->rc.source_alt_ref_pending = 0;
|
|
cpi->rc.baseline_gf_interval = cpi->rc.frames_to_key;
|
|
schedule_frames(cpi, 0, (cpi->rc.baseline_gf_interval - 1), 2, 0, 0);
|
|
} else {
|
|
// Setup a fixed period ARF group.
|
|
cpi->rc.source_alt_ref_pending = 1;
|
|
cpi->rc.baseline_gf_interval = FIXED_ARF_GROUP_SIZE;
|
|
schedule_frames(cpi, 0, -(cpi->rc.baseline_gf_interval - 1), 2, 1, 0);
|
|
}
|
|
|
|
// Replace level indicator of -1 with correct level.
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
if (cpi->arf_weight[i] > max_level) {
|
|
max_level = cpi->arf_weight[i];
|
|
}
|
|
}
|
|
++max_level;
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
if (cpi->arf_weight[i] == -1) {
|
|
cpi->arf_weight[i] = max_level;
|
|
}
|
|
}
|
|
cpi->max_arf_level = max_level;
|
|
#if 0
|
|
printf("\nSchedule: ");
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
printf("%4d ", cpi->frame_coding_order[i]);
|
|
}
|
|
printf("\n");
|
|
printf("ARFref: ");
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
printf("%4d ", cpi->arf_buffer_idx[i]);
|
|
}
|
|
printf("\n");
|
|
printf("Weight: ");
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
printf("%4d ", cpi->arf_weight[i]);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
// Analyse and define a gf/arf group.
|
|
static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
|
|
FIRSTPASS_STATS next_frame = { 0 };
|
|
const FIRSTPASS_STATS *start_pos;
|
|
struct twopass_rc *const twopass = &cpi->twopass;
|
|
int i;
|
|
double boost_score = 0.0;
|
|
double old_boost_score = 0.0;
|
|
double gf_group_err = 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;
|
|
const int max_bits = frame_max_bits(cpi); // Max bits for a single frame.
|
|
|
|
unsigned int allow_alt_ref = cpi->oxcf.play_alternate &&
|
|
cpi->oxcf.lag_in_frames;
|
|
|
|
int f_boost = 0;
|
|
int b_boost = 0;
|
|
int flash_detected;
|
|
int active_max_gf_interval;
|
|
RATE_CONTROL *const rc = &cpi->rc;
|
|
|
|
twopass->gf_group_bits = 0;
|
|
|
|
vp9_clear_system_state();
|
|
|
|
start_pos = twopass->stats_in;
|
|
|
|
// Load stats for the current frame.
|
|
mod_frame_err = calculate_modified_err(cpi, 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 (cpi->common.frame_type == KEY_FRAME || rc->source_alt_ref_active)
|
|
gf_group_err -= gf_first_frame_err;
|
|
|
|
// Motion breakout threshold for loop below depends on image size.
|
|
mv_ratio_accumulator_thresh = (cpi->common.width + cpi->common.height) / 10.0;
|
|
|
|
// Work out a maximum interval for the GF.
|
|
// If the image appears completely static we can extend beyond this.
|
|
// 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 + ((int)vp9_convert_qindex_to_q(rc->last_q[INTER_FRAME]) >> 5);
|
|
|
|
if (active_max_gf_interval > rc->max_gf_interval)
|
|
active_max_gf_interval = rc->max_gf_interval;
|
|
|
|
i = 0;
|
|
while (i < twopass->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, this_frame);
|
|
gf_group_err += mod_frame_err;
|
|
|
|
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->common, &next_frame);
|
|
decay_accumulator = decay_accumulator * loop_decay_rate;
|
|
|
|
// Monitor for static sections.
|
|
if ((next_frame.pcnt_inter - next_frame.pcnt_motion) <
|
|
zero_motion_accumulator) {
|
|
zero_motion_accumulator = next_frame.pcnt_inter -
|
|
next_frame.pcnt_motion;
|
|
}
|
|
|
|
// 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));
|
|
|
|
// Break out conditions.
|
|
if (
|
|
// Break at cpi->max_gf_interval unless almost totally static.
|
|
(i >= active_max_gf_interval && (zero_motion_accumulator < 0.995)) ||
|
|
(
|
|
// Don't break out with a very short interval.
|
|
(i > MIN_GF_INTERVAL) &&
|
|
((boost_score > 125.0) || (next_frame.pcnt_inter < 0.75)) &&
|
|
(!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) < IIFACTOR)))) {
|
|
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);
|
|
|
|
// Don't allow a gf too near the next kf.
|
|
if ((rc->frames_to_key - i) < MIN_GF_INTERVAL) {
|
|
while (i < (rc->frames_to_key + !rc->next_key_frame_forced)) {
|
|
++i;
|
|
|
|
if (EOF == input_stats(twopass, this_frame))
|
|
break;
|
|
|
|
if (i < rc->frames_to_key) {
|
|
mod_frame_err = calculate_modified_err(cpi, this_frame);
|
|
gf_group_err += mod_frame_err;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if CONFIG_MULTIPLE_ARF
|
|
if (cpi->multi_arf_enabled) {
|
|
// Initialize frame coding order variables.
|
|
cpi->new_frame_coding_order_period = 0;
|
|
cpi->next_frame_in_order = 0;
|
|
cpi->arf_buffered = 0;
|
|
vp9_zero(cpi->frame_coding_order);
|
|
vp9_zero(cpi->arf_buffer_idx);
|
|
vpx_memset(cpi->arf_weight, -1, sizeof(cpi->arf_weight));
|
|
}
|
|
#endif
|
|
|
|
// 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;
|
|
else
|
|
rc->baseline_gf_interval = i;
|
|
|
|
// Should we use the alternate reference frame.
|
|
if (allow_alt_ref &&
|
|
(i < cpi->oxcf.lag_in_frames) &&
|
|
(i >= MIN_GF_INTERVAL) &&
|
|
// For real scene cuts (not forced kfs) don't allow arf very near kf.
|
|
(rc->next_key_frame_forced ||
|
|
(i <= (rc->frames_to_key - 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;
|
|
|
|
#if CONFIG_MULTIPLE_ARF
|
|
// Set the ARF schedule.
|
|
if (cpi->multi_arf_enabled) {
|
|
schedule_frames(cpi, 0, -(rc->baseline_gf_interval - 1), 2, 1, 0);
|
|
}
|
|
#endif
|
|
} else {
|
|
rc->gfu_boost = (int)boost_score;
|
|
rc->source_alt_ref_pending = 0;
|
|
#if CONFIG_MULTIPLE_ARF
|
|
// Set the GF schedule.
|
|
if (cpi->multi_arf_enabled) {
|
|
schedule_frames(cpi, 0, rc->baseline_gf_interval - 1, 2, 0, 0);
|
|
assert(cpi->new_frame_coding_order_period ==
|
|
rc->baseline_gf_interval);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if CONFIG_MULTIPLE_ARF
|
|
if (cpi->multi_arf_enabled && (cpi->common.frame_type != KEY_FRAME)) {
|
|
int max_level = INT_MIN;
|
|
// Replace level indicator of -1 with correct level.
|
|
for (i = 0; i < cpi->frame_coding_order_period; ++i) {
|
|
if (cpi->arf_weight[i] > max_level) {
|
|
max_level = cpi->arf_weight[i];
|
|
}
|
|
}
|
|
++max_level;
|
|
for (i = 0; i < cpi->frame_coding_order_period; ++i) {
|
|
if (cpi->arf_weight[i] == -1) {
|
|
cpi->arf_weight[i] = max_level;
|
|
}
|
|
}
|
|
cpi->max_arf_level = max_level;
|
|
}
|
|
#if 0
|
|
if (cpi->multi_arf_enabled) {
|
|
printf("\nSchedule: ");
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
printf("%4d ", cpi->frame_coding_order[i]);
|
|
}
|
|
printf("\n");
|
|
printf("ARFref: ");
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
printf("%4d ", cpi->arf_buffer_idx[i]);
|
|
}
|
|
printf("\n");
|
|
printf("Weight: ");
|
|
for (i = 0; i < cpi->new_frame_coding_order_period; ++i) {
|
|
printf("%4d ", cpi->arf_weight[i]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
// Calculate the bits to be allocated to the group as a whole.
|
|
if (twopass->kf_group_bits > 0 && twopass->kf_group_error_left > 0) {
|
|
twopass->gf_group_bits = (int64_t)(cpi->twopass.kf_group_bits *
|
|
(gf_group_err / cpi->twopass.kf_group_error_left));
|
|
} else {
|
|
twopass->gf_group_bits = 0;
|
|
}
|
|
twopass->gf_group_bits = (twopass->gf_group_bits < 0) ?
|
|
0 : (twopass->gf_group_bits > twopass->kf_group_bits) ?
|
|
twopass->kf_group_bits : twopass->gf_group_bits;
|
|
|
|
// Clip cpi->twopass.gf_group_bits based on user supplied data rate
|
|
// variability limit, cpi->oxcf.two_pass_vbrmax_section.
|
|
if (twopass->gf_group_bits > (int64_t)max_bits * rc->baseline_gf_interval)
|
|
twopass->gf_group_bits = (int64_t)max_bits * rc->baseline_gf_interval;
|
|
|
|
// Reset the file position.
|
|
reset_fpf_position(twopass, start_pos);
|
|
|
|
// Assign bits to the arf or gf.
|
|
for (i = 0; i <= (rc->source_alt_ref_pending &&
|
|
cpi->common.frame_type != KEY_FRAME); ++i) {
|
|
int allocation_chunks;
|
|
int q = rc->last_q[INTER_FRAME];
|
|
int gf_bits;
|
|
|
|
int boost = (rc->gfu_boost * gfboost_qadjust(q)) / 100;
|
|
|
|
// Set max and minimum boost and hence minimum allocation.
|
|
boost = clamp(boost, 125, (rc->baseline_gf_interval + 1) * 200);
|
|
|
|
if (rc->source_alt_ref_pending && i == 0)
|
|
allocation_chunks = ((rc->baseline_gf_interval + 1) * 100) + boost;
|
|
else
|
|
allocation_chunks = (rc->baseline_gf_interval * 100) + (boost - 100);
|
|
|
|
// Prevent overflow.
|
|
if (boost > 1023) {
|
|
int divisor = boost >> 10;
|
|
boost /= divisor;
|
|
allocation_chunks /= divisor;
|
|
}
|
|
|
|
// Calculate the number of bits to be spent on the gf or arf based on
|
|
// the boost number.
|
|
gf_bits = (int)((double)boost * (twopass->gf_group_bits /
|
|
(double)allocation_chunks));
|
|
|
|
// If the frame that is to be boosted is simpler than the average for
|
|
// the gf/arf group then use an alternative calculation
|
|
// based on the error score of the frame itself.
|
|
if (rc->baseline_gf_interval < 1 ||
|
|
mod_frame_err < gf_group_err / (double)rc->baseline_gf_interval) {
|
|
double alt_gf_grp_bits = (double)twopass->kf_group_bits *
|
|
(mod_frame_err * (double)rc->baseline_gf_interval) /
|
|
DOUBLE_DIVIDE_CHECK(twopass->kf_group_error_left);
|
|
|
|
int alt_gf_bits = (int)((double)boost * (alt_gf_grp_bits /
|
|
(double)allocation_chunks));
|
|
|
|
if (gf_bits > alt_gf_bits)
|
|
gf_bits = alt_gf_bits;
|
|
} else {
|
|
// If it is harder than other frames in the group make sure it at
|
|
// least receives an allocation in keeping with its relative error
|
|
// score, otherwise it may be worse off than an "un-boosted" frame.
|
|
int alt_gf_bits = (int)((double)twopass->kf_group_bits *
|
|
mod_frame_err /
|
|
DOUBLE_DIVIDE_CHECK(twopass->kf_group_error_left));
|
|
|
|
if (alt_gf_bits > gf_bits)
|
|
gf_bits = alt_gf_bits;
|
|
}
|
|
|
|
// Don't allow a negative value for gf_bits.
|
|
if (gf_bits < 0)
|
|
gf_bits = 0;
|
|
|
|
if (i == 0) {
|
|
twopass->gf_bits = gf_bits;
|
|
}
|
|
if (i == 1 ||
|
|
(!rc->source_alt_ref_pending &&
|
|
cpi->common.frame_type != KEY_FRAME)) {
|
|
// Calculate the per frame bit target for this frame.
|
|
vp9_rc_set_frame_target(cpi, gf_bits);
|
|
}
|
|
}
|
|
|
|
{
|
|
// Adjust KF group bits and error remaining.
|
|
twopass->kf_group_error_left -= (int64_t)gf_group_err;
|
|
twopass->kf_group_bits -= twopass->gf_group_bits;
|
|
|
|
if (twopass->kf_group_bits < 0)
|
|
twopass->kf_group_bits = 0;
|
|
|
|
// 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) {
|
|
twopass->gf_group_error_left = (int64_t)(gf_group_err - mod_frame_err);
|
|
} else if (cpi->common.frame_type != KEY_FRAME) {
|
|
twopass->gf_group_error_left = (int64_t)(gf_group_err
|
|
- gf_first_frame_err);
|
|
} else {
|
|
twopass->gf_group_error_left = (int64_t)gf_group_err;
|
|
}
|
|
|
|
twopass->gf_group_bits -= twopass->gf_bits;
|
|
|
|
if (twopass->gf_group_bits < 0)
|
|
twopass->gf_group_bits = 0;
|
|
|
|
// This condition could fail if there are two kfs very close together
|
|
// despite MIN_GF_INTERVAL and would cause a divide by 0 in the
|
|
// calculation of alt_extra_bits.
|
|
if (rc->baseline_gf_interval >= 3) {
|
|
const int boost = rc->source_alt_ref_pending ? b_boost : rc->gfu_boost;
|
|
|
|
if (boost >= 150) {
|
|
const int pct_extra = MIN(20, (boost - 100) / 50);
|
|
const int alt_extra_bits = (int)((twopass->gf_group_bits * pct_extra) /
|
|
100);
|
|
twopass->gf_group_bits -= alt_extra_bits;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (cpi->common.frame_type != KEY_FRAME) {
|
|
FIRSTPASS_STATS sectionstats;
|
|
|
|
zero_stats(§ionstats);
|
|
reset_fpf_position(twopass, start_pos);
|
|
|
|
for (i = 0; i < rc->baseline_gf_interval; ++i) {
|
|
input_stats(twopass, &next_frame);
|
|
accumulate_stats(§ionstats, &next_frame);
|
|
}
|
|
|
|
avg_stats(§ionstats);
|
|
|
|
twopass->section_intra_rating = (int)
|
|
(sectionstats.intra_error /
|
|
DOUBLE_DIVIDE_CHECK(sectionstats.coded_error));
|
|
|
|
reset_fpf_position(twopass, start_pos);
|
|
}
|
|
}
|
|
|
|
// Allocate bits to a normal frame that is neither a gf an arf or a key frame.
|
|
static void assign_std_frame_bits(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
|
|
int target_frame_size;
|
|
double modified_err;
|
|
double err_fraction;
|
|
const int max_bits = frame_max_bits(cpi); // Max for a single frame.
|
|
|
|
// Calculate modified prediction error used in bit allocation.
|
|
modified_err = calculate_modified_err(cpi, this_frame);
|
|
|
|
if (cpi->twopass.gf_group_error_left > 0)
|
|
// What portion of the remaining GF group error is used by this frame.
|
|
err_fraction = modified_err / cpi->twopass.gf_group_error_left;
|
|
else
|
|
err_fraction = 0.0;
|
|
|
|
// How many of those bits available for allocation should we give it?
|
|
target_frame_size = (int)((double)cpi->twopass.gf_group_bits * err_fraction);
|
|
|
|
// Clip target size to 0 - max_bits (or cpi->twopass.gf_group_bits) at
|
|
// the top end.
|
|
target_frame_size = clamp(target_frame_size, 0,
|
|
MIN(max_bits, (int)cpi->twopass.gf_group_bits));
|
|
|
|
// Adjust error and bits remaining.
|
|
cpi->twopass.gf_group_error_left -= (int64_t)modified_err;
|
|
cpi->twopass.gf_group_bits -= target_frame_size;
|
|
|
|
if (cpi->twopass.gf_group_bits < 0)
|
|
cpi->twopass.gf_group_bits = 0;
|
|
|
|
// Per frame bit target for this frame.
|
|
vp9_rc_set_frame_target(cpi, target_frame_size);
|
|
}
|
|
|
|
static int test_candidate_kf(VP9_COMP *cpi,
|
|
const FIRSTPASS_STATS *last_frame,
|
|
const FIRSTPASS_STATS *this_frame,
|
|
const FIRSTPASS_STATS *next_frame) {
|
|
int is_viable_kf = 0;
|
|
|
|
// Does the frame satisfy the primary criteria of a key frame?
|
|
// If so, then examine how well it predicts subsequent frames.
|
|
if ((this_frame->pcnt_second_ref < 0.10) &&
|
|
(next_frame->pcnt_second_ref < 0.10) &&
|
|
((this_frame->pcnt_inter < 0.05) ||
|
|
(((this_frame->pcnt_inter - this_frame->pcnt_neutral) < 0.35) &&
|
|
((this_frame->intra_error /
|
|
DOUBLE_DIVIDE_CHECK(this_frame->coded_error)) < 2.5) &&
|
|
((fabs(last_frame->coded_error - this_frame->coded_error) /
|
|
DOUBLE_DIVIDE_CHECK(this_frame->coded_error) > 0.40) ||
|
|
(fabs(last_frame->intra_error - this_frame->intra_error) /
|
|
DOUBLE_DIVIDE_CHECK(this_frame->intra_error) > 0.40) ||
|
|
((next_frame->intra_error /
|
|
DOUBLE_DIVIDE_CHECK(next_frame->coded_error)) > 3.5))))) {
|
|
int i;
|
|
const FIRSTPASS_STATS *start_pos = cpi->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 = (IIKFACTOR1 * local_next_frame.intra_error /
|
|
DOUBLE_DIVIDE_CHECK(local_next_frame.coded_error));
|
|
|
|
if (next_iiratio > RMAX)
|
|
next_iiratio = RMAX;
|
|
|
|
// 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(&cpi->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(&cpi->twopass, start_pos);
|
|
|
|
is_viable_kf = 0;
|
|
}
|
|
}
|
|
|
|
return is_viable_kf;
|
|
}
|
|
|
|
static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
|
|
int i, j;
|
|
RATE_CONTROL *const rc = &cpi->rc;
|
|
struct twopass_rc *const twopass = &cpi->twopass;
|
|
FIRSTPASS_STATS last_frame;
|
|
const FIRSTPASS_STATS first_frame = *this_frame;
|
|
FIRSTPASS_STATS next_frame;
|
|
const FIRSTPASS_STATS *start_position = twopass->stats_in;
|
|
|
|
double decay_accumulator = 1.0;
|
|
double zero_motion_accumulator = 1.0;
|
|
double boost_score = 0;
|
|
double loop_decay_rate;
|
|
|
|
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};
|
|
|
|
vp9_zero(next_frame);
|
|
|
|
cpi->common.frame_type = KEY_FRAME;
|
|
|
|
// Is this a forced key frame by interval.
|
|
rc->this_key_frame_forced = rc->next_key_frame_forced;
|
|
|
|
// Clear the alt ref active flag as this can never be active on a key frame.
|
|
rc->source_alt_ref_active = 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, this_frame);
|
|
|
|
// Find the next keyframe.
|
|
i = 0;
|
|
while (twopass->stats_in < twopass->stats_in_end) {
|
|
// Accumulate kf group error.
|
|
kf_group_err += calculate_modified_err(cpi, 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 &&
|
|
lookup_next_frame_stats(twopass, &next_frame) != EOF) {
|
|
// Check for a scene cut.
|
|
if (test_candidate_kf(cpi, &last_frame, this_frame, &next_frame))
|
|
break;
|
|
|
|
// How fast is the prediction quality decaying?
|
|
loop_decay_rate = get_prediction_decay_rate(&cpi->common, &next_frame);
|
|
|
|
// 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->key_frame_frequency - 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_frame_frequency intervals then break out of the loop.
|
|
if (rc->frames_to_key >= 2 * (int)cpi->key_frame_frequency)
|
|
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 > (int)cpi->key_frame_frequency) {
|
|
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;
|
|
|
|
// 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, &tmp_frame);
|
|
input_stats(twopass, &tmp_frame);
|
|
}
|
|
rc->next_key_frame_forced = 1;
|
|
} else if (twopass->stats_in == twopass->stats_in_end) {
|
|
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, 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(cpi);
|
|
|
|
// 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;
|
|
}
|
|
// Reset the first pass file position.
|
|
reset_fpf_position(twopass, start_position);
|
|
|
|
// Determine how big to make this keyframe based on how well the subsequent
|
|
// frames use inter blocks.
|
|
decay_accumulator = 1.0;
|
|
boost_score = 0.0;
|
|
|
|
// Scan through the kf group collating various stats.
|
|
for (i = 0; i < rc->frames_to_key; ++i) {
|
|
if (EOF == input_stats(twopass, &next_frame))
|
|
break;
|
|
|
|
// Monitor for static sections.
|
|
if ((next_frame.pcnt_inter - next_frame.pcnt_motion) <
|
|
zero_motion_accumulator) {
|
|
zero_motion_accumulator = (next_frame.pcnt_inter -
|
|
next_frame.pcnt_motion);
|
|
}
|
|
|
|
// For the first few frames collect data to decide kf boost.
|
|
if (i <= (rc->max_gf_interval * 2)) {
|
|
double r;
|
|
if (next_frame.intra_error > twopass->kf_intra_err_min)
|
|
r = (IIKFACTOR2 * next_frame.intra_error /
|
|
DOUBLE_DIVIDE_CHECK(next_frame.coded_error));
|
|
else
|
|
r = (IIKFACTOR2 * twopass->kf_intra_err_min /
|
|
DOUBLE_DIVIDE_CHECK(next_frame.coded_error));
|
|
|
|
if (r > RMAX)
|
|
r = RMAX;
|
|
|
|
// How fast is prediction quality decaying.
|
|
if (!detect_flash(twopass, 0)) {
|
|
loop_decay_rate = get_prediction_decay_rate(&cpi->common, &next_frame);
|
|
decay_accumulator *= loop_decay_rate;
|
|
decay_accumulator = decay_accumulator < MIN_DECAY_FACTOR
|
|
? MIN_DECAY_FACTOR : decay_accumulator;
|
|
}
|
|
|
|
boost_score += (decay_accumulator * r);
|
|
}
|
|
}
|
|
|
|
{
|
|
FIRSTPASS_STATS sectionstats;
|
|
|
|
zero_stats(§ionstats);
|
|
reset_fpf_position(twopass, start_position);
|
|
|
|
for (i = 0; i < rc->frames_to_key; ++i) {
|
|
input_stats(twopass, &next_frame);
|
|
accumulate_stats(§ionstats, &next_frame);
|
|
}
|
|
|
|
avg_stats(§ionstats);
|
|
|
|
twopass->section_intra_rating = (int) (sectionstats.intra_error /
|
|
DOUBLE_DIVIDE_CHECK(sectionstats.coded_error));
|
|
}
|
|
|
|
// Reset the first pass file position.
|
|
reset_fpf_position(twopass, start_position);
|
|
|
|
// Work out how many bits to allocate for the key frame itself.
|
|
if (1) {
|
|
int kf_boost = (int)boost_score;
|
|
int allocation_chunks;
|
|
int alt_kf_bits;
|
|
|
|
if (kf_boost < (rc->frames_to_key * 3))
|
|
kf_boost = (rc->frames_to_key * 3);
|
|
|
|
if (kf_boost < MIN_KF_BOOST)
|
|
kf_boost = MIN_KF_BOOST;
|
|
|
|
// Make a note of baseline boost and the zero motion
|
|
// accumulator value for use elsewhere.
|
|
rc->kf_boost = kf_boost;
|
|
twopass->kf_zeromotion_pct = (int)(zero_motion_accumulator * 100.0);
|
|
|
|
// Key frame size depends on:
|
|
// (1) the error score for the whole key frame group,
|
|
// (2) the key frames' own error if this is smaller than the
|
|
// average for the group (optional),
|
|
// (3) insuring that the frame receives at least the allocation it would
|
|
// have received based on its own error score vs the error score
|
|
// remaining.
|
|
// Special case:
|
|
// If the sequence appears almost totally static we want to spend almost
|
|
// all of the bits on the key frame.
|
|
//
|
|
// We use (cpi->rc.frames_to_key - 1) below because the key frame itself is
|
|
// taken care of by kf_boost.
|
|
if (zero_motion_accumulator >= 0.99) {
|
|
allocation_chunks = ((rc->frames_to_key - 1) * 10) + kf_boost;
|
|
} else {
|
|
allocation_chunks = ((rc->frames_to_key - 1) * 100) + kf_boost;
|
|
}
|
|
|
|
// Prevent overflow.
|
|
if (kf_boost > 1028) {
|
|
int divisor = kf_boost >> 10;
|
|
kf_boost /= divisor;
|
|
allocation_chunks /= divisor;
|
|
}
|
|
|
|
twopass->kf_group_bits = (twopass->kf_group_bits < 0) ? 0
|
|
: twopass->kf_group_bits;
|
|
|
|
// Calculate the number of bits to be spent on the key frame.
|
|
twopass->kf_bits = (int)((double)kf_boost *
|
|
((double)twopass->kf_group_bits / allocation_chunks));
|
|
|
|
// If the key frame is actually easier than the average for the
|
|
// kf group (which does sometimes happen, e.g. a blank intro frame)
|
|
// then use an alternate calculation based on the kf error score
|
|
// which should give a smaller key frame.
|
|
if (kf_mod_err < kf_group_err / rc->frames_to_key) {
|
|
double alt_kf_grp_bits = ((double)twopass->bits_left *
|
|
(kf_mod_err * (double)rc->frames_to_key) /
|
|
DOUBLE_DIVIDE_CHECK(twopass->modified_error_left));
|
|
|
|
alt_kf_bits = (int)((double)kf_boost *
|
|
(alt_kf_grp_bits / (double)allocation_chunks));
|
|
|
|
if (twopass->kf_bits > alt_kf_bits)
|
|
twopass->kf_bits = alt_kf_bits;
|
|
} else {
|
|
// Else if it is much harder than other frames in the group make sure
|
|
// it at least receives an allocation in keeping with its relative
|
|
// error score.
|
|
alt_kf_bits = (int)((double)twopass->bits_left * (kf_mod_err /
|
|
DOUBLE_DIVIDE_CHECK(twopass->modified_error_left)));
|
|
|
|
if (alt_kf_bits > twopass->kf_bits) {
|
|
twopass->kf_bits = alt_kf_bits;
|
|
}
|
|
}
|
|
twopass->kf_group_bits -= twopass->kf_bits;
|
|
// Per frame bit target for this frame.
|
|
vp9_rc_set_frame_target(cpi, twopass->kf_bits);
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
void vp9_rc_get_first_pass_params(VP9_COMP *cpi) {
|
|
VP9_COMMON *const cm = &cpi->common;
|
|
if (!cpi->refresh_alt_ref_frame &&
|
|
(cm->current_video_frame == 0 ||
|
|
cm->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;
|
|
}
|
|
|
|
void vp9_rc_get_second_pass_params(VP9_COMP *cpi) {
|
|
VP9_COMMON *const cm = &cpi->common;
|
|
RATE_CONTROL *const rc = &cpi->rc;
|
|
struct twopass_rc *const twopass = &cpi->twopass;
|
|
const int frames_left = (int)(twopass->total_stats.count -
|
|
cm->current_video_frame);
|
|
FIRSTPASS_STATS this_frame;
|
|
FIRSTPASS_STATS this_frame_copy;
|
|
|
|
double this_frame_intra_error;
|
|
double this_frame_coded_error;
|
|
int target;
|
|
|
|
if (!twopass->stats_in)
|
|
return;
|
|
|
|
if (cpi->refresh_alt_ref_frame) {
|
|
cm->frame_type = INTER_FRAME;
|
|
vp9_rc_set_frame_target(cpi, twopass->gf_bits);
|
|
return;
|
|
}
|
|
|
|
vp9_clear_system_state();
|
|
|
|
if (cpi->oxcf.end_usage == USAGE_CONSTANT_QUALITY) {
|
|
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 int tmp_q = vp9_twopass_worst_quality(cpi, &twopass->total_left_stats,
|
|
section_target_bandwidth);
|
|
twopass->active_worst_quality = tmp_q;
|
|
rc->ni_av_qi = tmp_q;
|
|
rc->avg_q = vp9_convert_qindex_to_q(tmp_q);
|
|
}
|
|
vp9_zero(this_frame);
|
|
if (EOF == input_stats(twopass, &this_frame))
|
|
return;
|
|
|
|
this_frame_intra_error = this_frame.intra_error;
|
|
this_frame_coded_error = this_frame.coded_error;
|
|
|
|
// Keyframe and section processing.
|
|
if (rc->frames_to_key == 0 ||
|
|
(cm->frame_flags & FRAMEFLAGS_KEY)) {
|
|
// Define next KF group and assign bits to it.
|
|
this_frame_copy = this_frame;
|
|
find_next_key_frame(cpi, &this_frame_copy);
|
|
} else {
|
|
cm->frame_type = INTER_FRAME;
|
|
}
|
|
|
|
// Is this frame a GF / ARF? (Note: a key frame is always also a GF).
|
|
if (rc->frames_till_gf_update_due == 0) {
|
|
// Define next gf group and assign bits to it.
|
|
this_frame_copy = this_frame;
|
|
|
|
#if CONFIG_MULTIPLE_ARF
|
|
if (cpi->multi_arf_enabled) {
|
|
define_fixed_arf_period(cpi);
|
|
} else {
|
|
#endif
|
|
define_gf_group(cpi, &this_frame_copy);
|
|
#if CONFIG_MULTIPLE_ARF
|
|
}
|
|
#endif
|
|
|
|
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;
|
|
cpi->refresh_golden_frame = 1;
|
|
} else {
|
|
// Otherwise this is an ordinary frame.
|
|
// Assign bits from those allocated to the GF group.
|
|
this_frame_copy = this_frame;
|
|
assign_std_frame_bits(cpi, &this_frame_copy);
|
|
}
|
|
|
|
// Keep a globally available copy of this and the next frame's iiratio.
|
|
twopass->this_iiratio = (int)(this_frame_intra_error /
|
|
DOUBLE_DIVIDE_CHECK(this_frame_coded_error));
|
|
{
|
|
FIRSTPASS_STATS next_frame;
|
|
if (lookup_next_frame_stats(twopass, &next_frame) != EOF) {
|
|
twopass->next_iiratio = (int)(next_frame.intra_error /
|
|
DOUBLE_DIVIDE_CHECK(next_frame.coded_error));
|
|
}
|
|
}
|
|
|
|
if (cpi->common.frame_type == KEY_FRAME)
|
|
target = vp9_rc_clamp_iframe_target_size(cpi, rc->this_frame_target);
|
|
else
|
|
target = vp9_rc_clamp_pframe_target_size(cpi, rc->this_frame_target);
|
|
vp9_rc_set_frame_target(cpi, target);
|
|
|
|
// Update the total stats remaining structure.
|
|
subtract_stats(&twopass->total_left_stats, &this_frame);
|
|
}
|
|
|
|
void vp9_twopass_postencode_update(VP9_COMP *cpi, uint64_t bytes_used) {
|
|
#ifdef DISABLE_RC_LONG_TERM_MEM
|
|
cpi->twopass.bits_left -= cpi->rc.this_frame_target;
|
|
#else
|
|
cpi->twopass.bits_left -= 8 * bytes_used;
|
|
// Update bits left to the kf and gf groups to account for overshoot or
|
|
// undershoot on these frames.
|
|
if (cm->frame_type == KEY_FRAME) {
|
|
cpi->twopass.kf_group_bits += cpi->rc.this_frame_target -
|
|
cpi->rc.projected_frame_size;
|
|
|
|
cpi->twopass.kf_group_bits = MAX(cpi->twopass.kf_group_bits, 0);
|
|
} else if (cpi->refresh_golden_frame || cpi->refresh_alt_ref_frame) {
|
|
cpi->twopass.gf_group_bits += cpi->rc.this_frame_target -
|
|
cpi->rc.projected_frame_size;
|
|
|
|
cpi->twopass.gf_group_bits = MAX(cpi->twopass.gf_group_bits, 0);
|
|
}
|
|
#endif
|
|
}
|