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/****************************************************************************** |
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* |
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* XviD Bit Rate Controller Library |
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* - VBR 2 pass bitrate controler implementation - |
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* |
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* Copyright (C) 2002 Foxer <email?> |
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* 2002 Dirk Knop <dknop@gwdg.de> |
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* 2002-2003 Edouard Gomez <ed.gomez@free.fr> |
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* 2003 Pete Ross <pross@xvid.org> |
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* |
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* This curve treatment algorithm is the one originally implemented by Foxer |
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* and tuned by Dirk Knop for the XviD vfw frontend. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* $Id$ |
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* |
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*****************************************************************************/ |
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#include <stdio.h> |
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#include <math.h> |
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#include <limits.h> |
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#define RAD2DEG 57.295779513082320876798154814105 |
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#define DEG2RAD 0.017453292519943295769236907684886 |
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#include "../xvid.h" |
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#include "../image/image.h" |
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typedef struct { |
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int type; /* first pass type */ |
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int quant; /* first pass quant */ |
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int blks[3]; /* k,m,y blks */ |
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int length; /* first pass length */ |
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int scaled_length; /* scaled length */ |
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int desired_length; /* desired length; calcuated during encoding */ |
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int zone_mode; /* XVID_ZONE_xxx */ |
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double weight; |
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} stat_t; |
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/* context struct */ |
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typedef struct |
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{ |
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xvid_plugin_2pass2_t param; |
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|
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/* constant statistical data */ |
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int num_frames; |
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int num_keyframes; |
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uint64_t target; /* target filesize */ |
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|
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int count[3]; /* count of each frame types */ |
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uint64_t tot_length[3]; /* total length of each frame types */ |
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double avg_length[3]; /* avg */ |
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int min_length[3]; /* min frame length of each frame types */ |
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uint64_t tot_scaled_length[3]; /* total scaled length of each frame type */ |
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int max_length; /* max frame size */ |
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|
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/* zone statistical data */ |
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double avg_weight; /* average weight */ |
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int64_t tot_quant; /* total length used by XVID_ZONE_QUANT zones */ |
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double curve_comp_scale; |
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double movie_curve; |
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double alt_curve_low; |
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double alt_curve_high; |
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double alt_curve_low_diff; |
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double alt_curve_high_diff; |
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double alt_curve_curve_bias_bonus; |
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double alt_curve_mid_qual; |
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double alt_curve_qual_dev; |
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|
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/* dynamic */ |
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int * keyframe_locations; |
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stat_t * stats; |
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|
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double pquant_error[32]; |
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double bquant_error[32]; |
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int quant_count[32]; |
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int last_quant[3]; |
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|
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double curve_comp_error; |
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int overflow; |
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int KFoverflow; |
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int KFoverflow_partial; |
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int KF_idx; |
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double fq_error; |
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} rc_2pass2_t; |
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#define BUF_SZ 1024 |
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#define MAX_COLS 5 |
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/* open stats file, and count num frames */ |
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static int det_stats_length(rc_2pass2_t * rc, char * filename) |
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{ |
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FILE * f; |
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int n, ignore; |
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char type; |
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rc->num_frames = 0; |
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rc->num_keyframes = 0; |
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if ((f = fopen(filename, "rt")) == NULL) |
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return 0; |
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while((n = fscanf(f, "%c %d %d %d %d %d %d\n", |
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&type, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) { |
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if (type == 'i') { |
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rc->num_frames++; |
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rc->num_keyframes++; |
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}else if (type == 'p' || type == 'b' || type == 's') { |
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rc->num_frames++; |
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} |
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} |
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fclose(f); |
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return 1; |
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} |
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/* open stats file(s) and read into rc->stats array */ |
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static int load_stats(rc_2pass2_t *rc, char * filename) |
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{ |
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FILE * f; |
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int i, not_scaled; |
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if ((f = fopen(filename, "rt"))==NULL) |
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return 0; |
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i = 0; |
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not_scaled = 0; |
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while(i < rc->num_frames) { |
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stat_t * s = &rc->stats[i]; |
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int n; |
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char type; |
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s->scaled_length = 0; |
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n = fscanf(f, "%c %d %d %d %d %d %d\n", &type, &s->quant, &s->blks[0], &s->blks[1], &s->blks[2], &s->length, &s->scaled_length); |
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if (n == EOF) break; |
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if (n < 7) { |
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not_scaled = 1; |
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} |
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if (type == 'i') { |
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s->type = XVID_TYPE_IVOP; |
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}else if (type == 'p' || type == 's') { |
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s->type = XVID_TYPE_PVOP; |
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}else if (type == 'b') { |
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s->type = XVID_TYPE_BVOP; |
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}else{ /* unknown type */ |
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DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n"); |
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s->type = XVID_TYPE_PVOP; |
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} |
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i++; |
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} |
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rc->num_frames = i; |
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fclose(f); |
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return 1; |
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} |
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#if 0 |
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static void print_stats(rc_2pass2_t * rc) |
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{ |
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int i; |
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DPRINTF(XVID_DEBUG_RC, "type quant length scaled_length\n"); |
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for (i = 0; i < rc->num_frames; i++) { |
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stat_t * s = &rc->stats[i]; |
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DPRINTF(XVID_DEBUG_RC, "%d %d %d %d\n", s->type, s->quant, s->length, s->scaled_length); |
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} |
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} |
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#endif |
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/* pre-process the statistics data |
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- for each type, count, tot_length, min_length, max_length |
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- set keyframes_locations |
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*/ |
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static void |
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pre_process0(rc_2pass2_t * rc) |
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{ |
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int i,j; |
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for (i=0; i<3; i++) { |
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rc->count[i]=0; |
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rc->tot_length[i] = 0; |
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rc->last_quant[i] = 0; |
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rc->min_length[i] = INT_MAX; |
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} |
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rc->max_length = INT_MIN; |
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for (i=j=0; i<rc->num_frames; i++) { |
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stat_t * s = &rc->stats[i]; |
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rc->count[s->type-1]++; |
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rc->tot_length[s->type-1] += s->length; |
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if (s->length < rc->min_length[s->type-1]) { |
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rc->min_length[s->type-1] = s->length; |
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} |
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if (s->length > rc->max_length) { |
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rc->max_length = s->length; |
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} |
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if (s->type == XVID_TYPE_IVOP) { |
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rc->keyframe_locations[j] = i; |
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j++; |
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} |
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} |
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/* |
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* The "per sequence" overflow system considers a natural sequence to be |
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* formed by all frames between two iframes, so if we want to make sure |
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* the system does not go nuts during last sequence, we force the last |
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* frame to appear in the keyframe locations array. |
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*/ |
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rc->keyframe_locations[j] = i; |
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DPRINTF(XVID_DEBUG_RC, "Min 1st pass IFrame length: %d\n", rc->min_length[0]); |
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DPRINTF(XVID_DEBUG_RC, "Min 1st pass PFrame length: %d\n", rc->min_length[1]); |
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DPRINTF(XVID_DEBUG_RC, "Min 1st pass BFrame length: %d\n", rc->min_length[2]); |
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} |
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/* calculate zone weight "center" */ |
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static void |
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zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create) |
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{ |
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int i,j; |
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int n = 0; |
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rc->avg_weight = 0.0; |
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rc->tot_quant = 0; |
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if (create->num_zones == 0) { |
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for (j = 0; j < rc->num_frames; j++) { |
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rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
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rc->stats[j].weight = 1.0; |
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} |
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rc->avg_weight += rc->num_frames * 1.0; |
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n += rc->num_frames; |
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} |
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for(i=0; i < create->num_zones; i++) { |
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int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames; |
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if (i==0 && create->zones[i].frame > 0) { |
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for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) { |
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rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
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rc->stats[j].weight = 1.0; |
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} |
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rc->avg_weight += create->zones[i].frame * 1.0; |
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n += create->zones[i].frame; |
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} |
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if (create->zones[i].mode == XVID_ZONE_WEIGHT) { |
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for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
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rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
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rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
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} |
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next -= create->zones[i].frame; |
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rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base; |
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n += next; |
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}else{ // XVID_ZONE_QUANT |
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for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
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rc->stats[j].zone_mode = XVID_ZONE_QUANT; |
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rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
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rc->tot_quant += rc->stats[j].length; |
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} |
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} |
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} |
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rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0; |
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DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames); fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant); |
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} |
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/* scale the curve */ |
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static void |
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internal_scale(rc_2pass2_t *rc) |
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{ |
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int64_t target = rc->target - rc->tot_quant; |
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int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant; |
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int min_size[3]; |
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double scaler; |
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int i; |
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/* |
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* Perform an initial scale pass. |
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* if a frame size is scaled underneath our hardcoded minimums, then we |
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* force the frame size to the minimum, and deduct the original & scaled |
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* frame length from the original and target total lengths |
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*/ |
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min_size[0] = ((rc->stats[0].blks[0]*22) + 240) / 8; |
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min_size[1] = (rc->stats[0].blks[0] + 88) / 8; |
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min_size[2] = 8; |
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scaler = (double)target / (double)pass1_length; |
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if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
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DPRINTF(XVID_DEBUG_RC, "undersize warning\n"); |
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scaler = 1.0; |
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} |
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DPRINTF(XVID_DEBUG_RC, |
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"Before any correction: target=%i, tot_length=%i, scaler=%f\n", |
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(int)target, (int)pass1_length, scaler); |
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for (i=0; i<rc->num_frames; i++) { |
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stat_t * s = &rc->stats[i]; |
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int len; |
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if (s->zone_mode == XVID_ZONE_QUANT) { |
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s->scaled_length = s->length; |
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}else { |
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len = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
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if (len < min_size[s->type-1]) { /* force frame size */ |
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s->scaled_length = min_size[s->type-1]; |
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target -= s->scaled_length; |
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pass1_length -= s->length; |
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}else{ |
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s->scaled_length = 0; |
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} |
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} |
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} |
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scaler = (double)target / (double)pass1_length; |
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if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
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DPRINTF(XVID_DEBUG_RC,"undersize warning\n"); |
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scaler = 1.0; |
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} |
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DPRINTF(XVID_DEBUG_RC, |
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"After correction: target=%i, tot_length=%i, scaler=%f\n", |
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(int)target, (int)pass1_length, scaler); |
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for (i=0; i<rc->num_frames; i++) { |
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stat_t * s = &rc->stats[i]; |
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if (s->scaled_length==0) { /* ignore frame with forced frame sizes */ |
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s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
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} |
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} |
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} |
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static void |
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pre_process1(rc_2pass2_t * rc) |
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{ |
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int i; |
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double total1, total2; |
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uint64_t ivop_boost_total; |
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ivop_boost_total = 0; |
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rc->curve_comp_error = 0; |
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for (i=0; i<3; i++) { |
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rc->tot_scaled_length[i] = 0; |
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} |
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for (i=0; i<rc->num_frames; i++) { |
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stat_t * s = &rc->stats[i]; |
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|
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rc->tot_scaled_length[s->type-1] += s->scaled_length; |
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if (s->type == XVID_TYPE_IVOP) { |
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ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100; |
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} |
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} |
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rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) / |
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(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1])); |
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|
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for(i=0; i<3; i++) { |
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if (rc->count[i] == 0 || rc->movie_curve == 0) { |
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rc->avg_length[i] = 1; |
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}else{ |
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rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve; |
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} |
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} |
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|
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/* alt curve stuff here */ |
426 |
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|
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if (rc->param.use_alt_curve) { |
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const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1]; |
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const uint64_t tot_pvop = rc->tot_length[XVID_TYPE_PVOP-1]; |
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const uint64_t tot_bvop = rc->tot_length[XVID_TYPE_BVOP-1]; |
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const uint64_t tot_scaled_pvop = rc->tot_scaled_length[XVID_TYPE_PVOP-1]; |
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const uint64_t tot_scaled_bvop = rc->tot_scaled_length[XVID_TYPE_BVOP-1]; |
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|
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rc->alt_curve_low = avg_pvop - avg_pvop * (double)rc->param.alt_curve_low_dist / 100.0; |
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rc->alt_curve_low_diff = avg_pvop - rc->alt_curve_low; |
436 |
|
rc->alt_curve_high = avg_pvop + avg_pvop * (double)rc->param.alt_curve_high_dist / 100.0; |
437 |
|
rc->alt_curve_high_diff = rc->alt_curve_high - avg_pvop; |
438 |
|
|
439 |
|
if (rc->param.alt_curve_use_auto) { |
440 |
|
if (tot_bvop + tot_pvop > tot_scaled_bvop + tot_scaled_pvop) { |
441 |
|
rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 / |
442 |
|
((double)(tot_pvop + tot_bvop) / (double)(tot_scaled_pvop + tot_scaled_bvop))) * (double)rc->param.alt_curve_auto_str / 100.0); |
443 |
|
|
444 |
|
if (rc->param.alt_curve_min_rel_qual < 20) |
445 |
|
rc->param.alt_curve_min_rel_qual = 20; |
446 |
|
}else{ |
447 |
|
rc->param.alt_curve_min_rel_qual = 100; |
448 |
|
} |
449 |
|
} |
450 |
|
rc->alt_curve_mid_qual = (1.0 + (double)rc->param.alt_curve_min_rel_qual / 100.0) / 2.0; |
451 |
|
rc->alt_curve_qual_dev = 1.0 - rc->alt_curve_mid_qual; |
452 |
|
|
453 |
|
if (rc->param.alt_curve_low_dist > 100) { |
454 |
|
switch(rc->param.alt_curve_type) { |
455 |
|
case XVID_CURVE_SINE: // Sine Curve (high aggressiveness) |
456 |
|
rc->alt_curve_qual_dev *= 2.0 / (1.0 + sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))); |
457 |
|
rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)); |
458 |
|
break; |
459 |
|
case XVID_CURVE_LINEAR: // Linear (medium aggressiveness) |
460 |
|
rc->alt_curve_qual_dev *= 2.0 / (1.0 + avg_pvop / rc->alt_curve_low_diff); |
461 |
|
rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * avg_pvop / rc->alt_curve_low_diff; |
462 |
|
break; |
463 |
|
case XVID_CURVE_COSINE: // Cosine Curve (low aggressiveness) |
464 |
|
rc->alt_curve_qual_dev *= 2.0 / (1.0 + (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)))); |
465 |
|
rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))); |
466 |
|
} |
467 |
|
} |
468 |
|
} |
469 |
|
/* --- */ |
470 |
|
|
471 |
|
|
472 |
|
total1=total2=0; |
473 |
|
for (i=0; i<rc->num_frames; i++) { |
474 |
|
stat_t * s = &rc->stats[i]; |
475 |
|
|
476 |
|
if (s->type != XVID_TYPE_IVOP) { |
477 |
|
double dbytes,dbytes2; |
478 |
|
|
479 |
|
dbytes = s->scaled_length / rc->movie_curve; |
480 |
|
dbytes2 = 0; /* XXX: warning */ |
481 |
|
total1 += dbytes; |
482 |
|
if (s->type == XVID_TYPE_BVOP) |
483 |
|
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
484 |
|
|
485 |
|
if (rc->param.use_alt_curve) { |
486 |
|
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
487 |
|
|
488 |
|
if (dbytes >= rc->alt_curve_high) { |
489 |
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
490 |
|
}else{ |
491 |
|
switch(rc->param.alt_curve_type) { |
492 |
|
case XVID_CURVE_SINE : |
493 |
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff))); |
494 |
|
break; |
495 |
|
case XVID_CURVE_LINEAR : |
496 |
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_high_diff); |
497 |
|
break; |
498 |
|
case XVID_CURVE_COSINE : |
499 |
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff)))); |
500 |
|
} |
501 |
|
} |
502 |
|
}else{ |
503 |
|
if (dbytes <= rc->alt_curve_low) { |
504 |
|
dbytes2 = dbytes; |
505 |
|
}else{ |
506 |
|
switch(rc->param.alt_curve_type) { |
507 |
|
case XVID_CURVE_SINE : |
508 |
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff))); |
509 |
|
break; |
510 |
|
case XVID_CURVE_LINEAR : |
511 |
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_low_diff); |
512 |
|
break; |
513 |
|
case XVID_CURVE_COSINE : |
514 |
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff)))); |
515 |
|
} |
516 |
|
} |
517 |
|
|
518 |
|
} |
519 |
|
|
520 |
|
|
521 |
|
}else{ |
522 |
|
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
523 |
|
dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
524 |
|
}else{ |
525 |
|
dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
526 |
|
} |
527 |
|
} |
528 |
|
|
529 |
|
if (s->type == XVID_TYPE_BVOP) { |
530 |
|
dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
531 |
|
if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1]) |
532 |
|
dbytes2 = rc->min_length[XVID_TYPE_BVOP-1]; |
533 |
|
}else{ |
534 |
|
if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1]) |
535 |
|
dbytes2 = rc->min_length[XVID_TYPE_PVOP-1]; |
536 |
|
} |
537 |
|
total2 += dbytes2; |
538 |
|
} |
539 |
|
} |
540 |
|
|
541 |
|
rc->curve_comp_scale = total1 / total2; |
542 |
|
|
543 |
|
if (!rc->param.use_alt_curve) { |
544 |
|
DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n", |
545 |
|
(int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale)); |
546 |
|
} |
547 |
|
|
548 |
|
if (rc->param.use_alt_curve) { |
549 |
|
int bonus_bias = rc->param.alt_curve_bonus_bias; |
550 |
|
int oldquant = 1; |
551 |
|
|
552 |
|
if (rc->param.alt_curve_use_auto_bonus_bias) |
553 |
|
bonus_bias = rc->param.alt_curve_min_rel_qual; |
554 |
|
|
555 |
|
rc->alt_curve_curve_bias_bonus = (total1 - total2) * (double)bonus_bias / 100.0 / (double)(rc->num_frames /* - credits_frames */ - rc->num_keyframes); |
556 |
|
rc->curve_comp_scale = ((total1 - total2) * (1.0 - (double)bonus_bias / 100.0) + total2) / total2; |
557 |
|
|
558 |
|
|
559 |
|
/* special info for alt curve: bias bonus and quantizer thresholds */ |
560 |
|
|
561 |
|
DPRINTF(XVID_DEBUG_RC, "avg scaled framesize:%i\n", (int)rc->avg_length[XVID_TYPE_PVOP-1]); |
562 |
|
DPRINTF(XVID_DEBUG_RC, "bias bonus:%i bytes\n", (int)rc->alt_curve_curve_bias_bonus); |
563 |
|
|
564 |
|
for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) { |
565 |
|
double curve_temp, dbytes; |
566 |
|
int newquant; |
567 |
|
|
568 |
|
dbytes = i; |
569 |
|
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
570 |
|
if (dbytes >= rc->alt_curve_high) { |
571 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
572 |
|
}else{ |
573 |
|
switch(rc->param.alt_curve_type) |
574 |
|
{ |
575 |
|
case XVID_CURVE_SINE : |
576 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff))); |
577 |
|
break; |
578 |
|
case XVID_CURVE_LINEAR : |
579 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_high_diff); |
580 |
|
break; |
581 |
|
case XVID_CURVE_COSINE : |
582 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff)))); |
583 |
|
} |
584 |
|
} |
585 |
|
}else{ |
586 |
|
if (dbytes <= rc->alt_curve_low) { |
587 |
|
curve_temp = dbytes; |
588 |
|
}else{ |
589 |
|
switch(rc->param.alt_curve_type) |
590 |
|
{ |
591 |
|
case XVID_CURVE_SINE : |
592 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff))); |
593 |
|
break; |
594 |
|
case XVID_CURVE_LINEAR : |
595 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_low_diff); |
596 |
|
break; |
597 |
|
case XVID_CURVE_COSINE : |
598 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff)))); |
599 |
|
} |
600 |
|
} |
601 |
|
} |
602 |
|
|
603 |
|
if (rc->movie_curve > 1.0) |
604 |
|
dbytes *= rc->movie_curve; |
605 |
|
|
606 |
|
newquant = (int)(dbytes * 2.0 / (curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus)); |
607 |
|
if (newquant > 1) { |
608 |
|
if (newquant != oldquant) { |
609 |
|
int percent = (int)((i - rc->avg_length[XVID_TYPE_PVOP-1]) * 100.0 / rc->avg_length[XVID_TYPE_PVOP-1]); |
610 |
|
oldquant = newquant; |
611 |
|
DPRINTF(XVID_DEBUG_RC, "quant:%i threshold at %i : %i percent\n", newquant, i, percent); |
612 |
|
} |
613 |
|
} |
614 |
|
} |
615 |
|
|
616 |
|
} |
617 |
|
|
618 |
|
rc->overflow = 0; |
619 |
|
rc->KFoverflow = 0; |
620 |
|
rc->KFoverflow_partial = 0; |
621 |
|
rc->KF_idx = 1; |
622 |
|
} |
623 |
|
|
624 |
|
|
625 |
|
|
626 |
|
|
627 |
|
static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle) |
628 |
|
{ |
629 |
|
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
630 |
|
rc_2pass2_t * rc; |
631 |
|
int i; |
632 |
|
|
633 |
|
rc = malloc(sizeof(rc_2pass2_t)); |
634 |
|
if (rc == NULL) |
635 |
|
return XVID_ERR_MEMORY; |
636 |
|
|
637 |
|
rc->param = *param; |
638 |
|
|
639 |
|
if (rc->param.keyframe_boost <= 0) rc->param.keyframe_boost = 0; |
640 |
|
if (rc->param.payback_method <= 0) rc->param.payback_method = XVID_PAYBACK_PROP; |
641 |
|
if (rc->param.bitrate_payback_delay <= 0) rc->param.bitrate_payback_delay = 250; |
642 |
|
if (rc->param.curve_compression_high <= 0) rc->param.curve_compression_high = 0; |
643 |
|
if (rc->param.curve_compression_low <= 0) rc->param.curve_compression_low = 0; |
644 |
|
if (rc->param.max_overflow_improvement <= 0) rc->param.max_overflow_improvement = 60; |
645 |
|
if (rc->param.max_overflow_degradation <= 0) rc->param.max_overflow_degradation = 60; |
646 |
|
|
647 |
|
if (rc->param.use_alt_curve <= 0) rc->param.use_alt_curve = 0; |
648 |
|
if (rc->param.alt_curve_high_dist <= 0) rc->param.alt_curve_high_dist = 500; |
649 |
|
if (rc->param.alt_curve_low_dist <= 0) rc->param.alt_curve_low_dist = 90; |
650 |
|
if (rc->param.alt_curve_use_auto <= 0) rc->param.alt_curve_use_auto = 1; |
651 |
|
if (rc->param.alt_curve_auto_str <= 0) rc->param.alt_curve_auto_str = 30; |
652 |
|
if (rc->param.alt_curve_type <= 0) rc->param.alt_curve_type = XVID_CURVE_LINEAR; |
653 |
|
if (rc->param.alt_curve_min_rel_qual <= 0) rc->param.alt_curve_min_rel_qual = 50; |
654 |
|
if (rc->param.alt_curve_use_auto_bonus_bias <= 0) rc->param.alt_curve_use_auto_bonus_bias = 1; |
655 |
|
if (rc->param.alt_curve_bonus_bias <= 0) rc->param.alt_curve_bonus_bias = 50; |
656 |
|
|
657 |
|
if (rc->param.kftreshold <= 0) rc->param.kftreshold = 10; |
658 |
|
if (rc->param.kfreduction <= 0) rc->param.kfreduction = 20; |
659 |
|
if (rc->param.min_key_interval <= 0) rc->param.min_key_interval = 300; |
660 |
|
|
661 |
|
if (!det_stats_length(rc, param->filename)){ |
662 |
|
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
663 |
|
free(rc); |
664 |
|
return XVID_ERR_FAIL; |
665 |
|
} |
666 |
|
|
667 |
|
if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) { |
668 |
|
free(rc); |
669 |
|
return XVID_ERR_MEMORY; |
670 |
|
} |
671 |
|
|
672 |
|
/* |
673 |
|
* We need an extra location because we do as if the last frame were an |
674 |
|
* IFrame. This is needed because our code consider that frames between |
675 |
|
* 2 IFrames form a natural sequence. So we store last frame as a |
676 |
|
* keyframe location. |
677 |
|
*/ |
678 |
|
if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) { |
679 |
|
free(rc->stats); |
680 |
|
free(rc); |
681 |
|
return XVID_ERR_MEMORY; |
682 |
|
} |
683 |
|
|
684 |
|
if (!load_stats(rc, param->filename)) { |
685 |
|
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
686 |
|
free(rc->keyframe_locations); |
687 |
|
free(rc->stats); |
688 |
|
free(rc); |
689 |
|
return XVID_ERR_FAIL; |
690 |
|
} |
691 |
|
|
692 |
|
/* pre-process our stats */ |
693 |
|
|
694 |
|
if (rc->num_frames < create->fbase/create->fincr) { |
695 |
|
rc->target = rc->param.bitrate / 8; /* one second */ |
696 |
|
}else{ |
697 |
|
rc->target = |
698 |
|
((uint64_t)rc->param.bitrate * (uint64_t)rc->num_frames * (uint64_t)create->fincr) / \ |
699 |
|
((uint64_t)create->fbase * 8); |
700 |
|
} |
701 |
|
|
702 |
|
DPRINTF(XVID_DEBUG_RC, "Number of frames: %d\n", rc->num_frames); |
703 |
|
DPRINTF(XVID_DEBUG_RC, "Frame rate: %d/%d\n", create->fbase, create->fincr); |
704 |
|
DPRINTF(XVID_DEBUG_RC, "Target bitrate: %ld\n", rc->param.bitrate); |
705 |
|
DPRINTF(XVID_DEBUG_RC, "Target filesize: %lld\n", rc->target); |
706 |
|
|
707 |
|
/* Compensate the mean frame overhead caused by the container */ |
708 |
|
rc->target -= rc->num_frames*rc->param.container_frame_overhead; |
709 |
|
DPRINTF(XVID_DEBUG_RC, "Container Frame overhead: %d\n", rc->param.container_frame_overhead); |
710 |
|
DPRINTF(XVID_DEBUG_RC, "Target filesize (after container compensation): %lld\n", rc->target); |
711 |
|
|
712 |
|
pre_process0(rc); |
713 |
|
|
714 |
|
if (rc->param.bitrate) { |
715 |
|
zone_process(rc, create); |
716 |
|
internal_scale(rc); |
717 |
|
}else{ |
718 |
|
/* external scaler: ignore zone */ |
719 |
|
for (i=0;i<rc->num_frames;i++) { |
720 |
|
rc->stats[i].zone_mode = XVID_ZONE_WEIGHT; |
721 |
|
rc->stats[i].weight = 1.0; |
722 |
|
} |
723 |
|
rc->avg_weight = 1.0; |
724 |
|
rc->tot_quant = 0; |
725 |
|
} |
726 |
|
pre_process1(rc); |
727 |
|
|
728 |
|
for (i=0; i<32;i++) { |
729 |
|
rc->pquant_error[i] = 0; |
730 |
|
rc->bquant_error[i] = 0; |
731 |
|
rc->quant_count[i] = 0; |
732 |
|
} |
733 |
|
|
734 |
|
rc->fq_error = 0; |
735 |
|
|
736 |
|
*handle = rc; |
737 |
|
return(0); |
738 |
|
} |
739 |
|
|
740 |
|
|
741 |
|
static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy) |
742 |
|
{ |
743 |
|
free(rc->keyframe_locations); |
744 |
|
free(rc->stats); |
745 |
|
free(rc); |
746 |
|
return(0); |
747 |
|
} |
748 |
|
|
749 |
|
|
750 |
|
|
751 |
|
static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data) |
752 |
|
{ |
753 |
|
stat_t * s = &rc->stats[data->frame_num]; |
754 |
|
int overflow; |
755 |
|
int desired; |
756 |
|
double dbytes; |
757 |
|
double curve_temp; |
758 |
|
int capped_to_max_framesize = 0; |
759 |
|
|
760 |
|
/* |
761 |
|
* This function is quite long but easy to understand. In order to simplify |
762 |
|
* the code path (a bit), we treat 3 cases that can return immediatly. |
763 |
|
*/ |
764 |
|
|
765 |
|
/* First case: Another plugin has already set a quantizer */ |
766 |
|
if (data->quant > 0) |
767 |
|
return(0); |
768 |
|
|
769 |
|
/* Second case: We are in a Quant zone */ |
770 |
|
if (s->zone_mode == XVID_ZONE_QUANT) { |
771 |
|
|
772 |
|
rc->fq_error += s->weight; |
773 |
|
data->quant = (int)rc->fq_error; |
774 |
|
rc->fq_error -= data->quant; |
775 |
|
|
776 |
|
s->desired_length = s->length; |
777 |
|
|
778 |
|
return(0); |
779 |
|
|
780 |
|
} |
781 |
|
|
782 |
|
/* Third case: insufficent stats data */ |
783 |
|
if (data->frame_num >= rc->num_frames) |
784 |
|
return 0; |
785 |
|
|
786 |
|
/* |
787 |
|
* The last case is the one every normal minded developer should fear to |
788 |
|
* maintain in a project :-) |
789 |
|
*/ |
790 |
|
|
791 |
|
/* XXX: why by 8 */ |
792 |
|
overflow = rc->overflow / 8; |
793 |
|
|
794 |
|
/* |
795 |
|
* The rc->overflow field represents the overflow in current scene (between two |
796 |
|
* IFrames) so we must not forget to reset it if we are enetring a new scene |
797 |
|
*/ |
798 |
|
if (s->type == XVID_TYPE_IVOP) { |
799 |
|
overflow = 0; |
800 |
|
} |
801 |
|
|
802 |
|
desired = s->scaled_length; |
803 |
|
|
804 |
|
dbytes = desired; |
805 |
|
if (s->type == XVID_TYPE_IVOP) { |
806 |
|
dbytes += desired * rc->param.keyframe_boost / 100; |
807 |
|
} |
808 |
|
dbytes /= rc->movie_curve; |
809 |
|
|
810 |
|
/* |
811 |
|
* We are now entering in the hard part of the algo, it was first designed |
812 |
|
* to work with i/pframes only streams, so the way it computes things is |
813 |
|
* adapted to pframes only. However we can use it if we just take care to |
814 |
|
* scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and |
815 |
|
* then before really using values depending on frame sizes, scaling the |
816 |
|
* value again with the inverse ratio |
817 |
|
*/ |
818 |
|
if (s->type == XVID_TYPE_BVOP) { |
819 |
|
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
820 |
|
} |
821 |
|
|
822 |
|
/* |
823 |
|
* Apply user's choosen Payback method. Payback helps bitrate to follow the |
824 |
|
* scaled curve "paying back" past errors in curve previsions. |
825 |
|
*/ |
826 |
|
if (rc->param.payback_method == XVID_PAYBACK_BIAS) { |
827 |
|
desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay); |
828 |
|
}else{ |
829 |
|
desired = (int)(rc->curve_comp_error * dbytes / |
830 |
|
rc->avg_length[XVID_TYPE_PVOP-1] / rc->param.bitrate_payback_delay); |
831 |
|
|
832 |
|
if (labs(desired) > fabs(rc->curve_comp_error)) { |
833 |
|
desired = (int)rc->curve_comp_error; |
834 |
|
} |
835 |
|
} |
836 |
|
|
837 |
|
rc->curve_comp_error -= desired; |
838 |
|
|
839 |
|
/* |
840 |
|
* Alt curve treatment is not that hard to understand though the formulas |
841 |
|
* seem to be huge. Alt treatment is basically a way to soft/harden the |
842 |
|
* curve flux applying sine/linear/cosine ratios |
843 |
|
*/ |
844 |
|
|
845 |
|
/* XXX: warning */ |
846 |
|
curve_temp = 0; |
847 |
|
|
848 |
|
if (rc->param.use_alt_curve) { |
849 |
|
if (s->type != XVID_TYPE_IVOP) { |
850 |
|
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
851 |
|
if (dbytes >= rc->alt_curve_high) { |
852 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
853 |
|
} else { |
854 |
|
switch(rc->param.alt_curve_type) { |
855 |
|
case XVID_CURVE_SINE : |
856 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff))); |
857 |
|
break; |
858 |
|
case XVID_CURVE_LINEAR : |
859 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_high_diff); |
860 |
|
break; |
861 |
|
case XVID_CURVE_COSINE : |
862 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff)))); |
863 |
|
} |
864 |
|
} |
865 |
|
} else { |
866 |
|
if (dbytes <= rc->alt_curve_low){ |
867 |
|
curve_temp = dbytes; |
868 |
|
} else { |
869 |
|
switch(rc->param.alt_curve_type) { |
870 |
|
case XVID_CURVE_SINE : |
871 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff))); |
872 |
|
break; |
873 |
|
case XVID_CURVE_LINEAR : |
874 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_low_diff); |
875 |
|
break; |
876 |
|
case XVID_CURVE_COSINE : |
877 |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff)))); |
878 |
|
} |
879 |
|
} |
880 |
|
} |
881 |
|
|
882 |
|
/* |
883 |
|
* End of code path for curve_temp, as told earlier, we are now |
884 |
|
* obliged to scale the value to a bframe one using the inverse |
885 |
|
* ratio applied earlier |
886 |
|
*/ |
887 |
|
if (s->type == XVID_TYPE_BVOP) |
888 |
|
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
889 |
|
|
890 |
|
curve_temp = curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus; |
891 |
|
|
892 |
|
desired += ((int)curve_temp); |
893 |
|
rc->curve_comp_error += curve_temp - (int)curve_temp; |
894 |
|
} else { |
895 |
|
/* |
896 |
|
* End of code path for dbytes, as told earlier, we are now |
897 |
|
* obliged to scale the value to a bframe one using the inverse |
898 |
|
* ratio applied earlier |
899 |
|
*/ |
900 |
|
if (s->type == XVID_TYPE_BVOP) |
901 |
|
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
902 |
|
|
903 |
|
desired += ((int)dbytes); |
904 |
|
rc->curve_comp_error += dbytes - (int)dbytes; |
905 |
|
} |
906 |
|
|
907 |
|
} else if ((rc->param.curve_compression_high + rc->param.curve_compression_low) && s->type != XVID_TYPE_IVOP) { |
908 |
|
|
909 |
|
curve_temp = rc->curve_comp_scale; |
910 |
|
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
911 |
|
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
912 |
|
} else { |
913 |
|
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
914 |
|
} |
915 |
|
|
916 |
|
/* |
917 |
|
* End of code path for curve_temp, as told earlier, we are now |
918 |
|
* obliged to scale the value to a bframe one using the inverse |
919 |
|
* ratio applied earlier |
920 |
|
*/ |
921 |
|
if (s->type == XVID_TYPE_BVOP) |
922 |
|
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
923 |
|
|
924 |
|
desired += (int)curve_temp; |
925 |
|
rc->curve_comp_error += curve_temp - (int)curve_temp; |
926 |
|
} else { |
927 |
|
/* |
928 |
|
* End of code path for dbytes, as told earlier, we are now |
929 |
|
* obliged to scale the value to a bframe one using the inverse |
930 |
|
* ratio applied earlier |
931 |
|
*/ |
932 |
|
if (s->type == XVID_TYPE_BVOP){ |
933 |
|
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
934 |
|
} |
935 |
|
|
936 |
|
desired += (int)dbytes; |
937 |
|
rc->curve_comp_error += dbytes - (int)dbytes; |
938 |
|
} |
939 |
|
|
940 |
|
|
941 |
|
/* |
942 |
|
* We can't do bigger frames than first pass, this would be stupid as first |
943 |
|
* pass is quant=2 and that reaching quant=1 is not worth it. We would lose |
944 |
|
* many bytes and we would not not gain much quality. |
945 |
|
*/ |
946 |
|
if (desired > s->length) { |
947 |
|
rc->curve_comp_error += desired - s->length; |
948 |
|
desired = s->length; |
949 |
|
}else{ |
950 |
|
if (desired < rc->min_length[s->type-1]) { |
951 |
|
if (s->type == XVID_TYPE_IVOP){ |
952 |
|
rc->curve_comp_error -= rc->min_length[XVID_TYPE_IVOP-1] - desired; |
953 |
|
} |
954 |
|
desired = rc->min_length[s->type-1]; |
955 |
|
} |
956 |
|
} |
957 |
|
|
958 |
|
s->desired_length = desired; |
959 |
|
|
960 |
|
|
961 |
|
/* if this keyframe is too close to the next, reduce it's byte allotment |
962 |
|
XXX: why do we do this after setting the desired length */ |
963 |
|
|
964 |
|
if (s->type == XVID_TYPE_IVOP) { |
965 |
|
int KFdistance = rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1]; |
966 |
|
|
967 |
|
if (KFdistance < rc->param.kftreshold) { |
968 |
|
|
969 |
|
KFdistance = KFdistance - rc->param.min_key_interval; |
970 |
|
|
971 |
|
if (KFdistance >= 0) { |
972 |
|
int KF_min_size; |
973 |
|
|
974 |
|
KF_min_size = desired * (100 - rc->param.kfreduction) / 100; |
975 |
|
if (KF_min_size < 1) |
976 |
|
KF_min_size = 1; |
977 |
|
|
978 |
|
desired = KF_min_size + (desired - KF_min_size) * KFdistance / |
979 |
|
(rc->param.kftreshold - rc->param.min_key_interval); |
980 |
|
|
981 |
|
if (desired < 1) |
982 |
|
desired = 1; |
983 |
|
} |
984 |
|
} |
985 |
|
} |
986 |
|
|
987 |
|
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
988 |
|
|
989 |
|
/* Reign in overflow with huge frames */ |
990 |
|
if (labs(overflow) > labs(rc->overflow)) { |
991 |
|
overflow = rc->overflow; |
992 |
|
} |
993 |
|
|
994 |
|
/* Make sure overflow doesn't run away */ |
995 |
|
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
996 |
|
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
997 |
|
overflow * rc->param.max_overflow_improvement / 100; |
998 |
|
} else if (overflow < desired * rc->param.max_overflow_degradation / -100){ |
999 |
|
desired += desired * rc->param.max_overflow_degradation / -100; |
1000 |
|
} else { |
1001 |
|
desired += overflow; |
1002 |
|
} |
1003 |
|
|
1004 |
|
/* Make sure we are not higher than desired frame size */ |
1005 |
|
if (desired > rc->max_length) { |
1006 |
|
capped_to_max_framesize = 1; |
1007 |
|
desired = rc->max_length; |
1008 |
|
DPRINTF(XVID_DEBUG_RC,"[%i] Capped to maximum frame size\n", |
1009 |
|
data->frame_num); |
1010 |
|
} |
1011 |
|
|
1012 |
|
/* Make sure to not scale below the minimum framesize */ |
1013 |
|
if (desired < rc->min_length[s->type-1]) { |
1014 |
|
desired = rc->min_length[s->type-1]; |
1015 |
|
DPRINTF(XVID_DEBUG_RC,"[%i] Capped to minimum frame size\n", |
1016 |
|
data->frame_num); |
1017 |
|
} |
1018 |
|
|
1019 |
|
/* |
1020 |
|
* Don't laugh at this very 'simple' quant<->filesize relationship, it |
1021 |
|
* proves to be acurate enough for our algorithm |
1022 |
|
*/ |
1023 |
|
data->quant= (s->quant * s->length) / desired; |
1024 |
|
|
1025 |
|
/* Let's clip the computed quantizer, if needed */ |
1026 |
|
if (data->quant < 1) { |
1027 |
|
data->quant = 1; |
1028 |
|
} else if (data->quant > 31) { |
1029 |
|
data->quant = 31; |
1030 |
|
} else if (s->type != XVID_TYPE_IVOP) { |
1031 |
|
|
1032 |
|
/* |
1033 |
|
* The frame quantizer has not been clipped, this appear to be a good |
1034 |
|
* computed quantizer, however past frames give us some info about how |
1035 |
|
* this quantizer performs against the algo prevision. Let's use this |
1036 |
|
* prevision to increase the quantizer when we observe a too big |
1037 |
|
* accumulated error |
1038 |
|
*/ |
1039 |
|
if (s->type== XVID_TYPE_BVOP) { |
1040 |
|
rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
1041 |
|
|
1042 |
|
if (rc->bquant_error[data->quant] >= 1.0) { |
1043 |
|
rc->bquant_error[data->quant] -= 1.0; |
1044 |
|
data->quant++; |
1045 |
|
} |
1046 |
|
} else { |
1047 |
|
rc->pquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
1048 |
|
|
1049 |
|
if (rc->pquant_error[data->quant] >= 1.0) { |
1050 |
|
rc->pquant_error[data->quant] -= 1.0; |
1051 |
|
++data->quant; |
1052 |
|
} |
1053 |
|
} |
1054 |
|
} |
1055 |
|
|
1056 |
|
/* |
1057 |
|
* Now we have a computed quant that is in the right quante range, with a |
1058 |
|
* possible +1 correction due to cumulated error. We can now safely clip |
1059 |
|
* the quantizer again with user's quant ranges. "Safely" means the Rate |
1060 |
|
* Control could learn more about this quantizer, this knowledge is useful |
1061 |
|
* for future frames even if it this quantizer won't be really used atm, |
1062 |
|
* that's why we don't perform this clipping earlier. |
1063 |
|
*/ |
1064 |
|
if (data->quant < data->min_quant[s->type-1]) { |
1065 |
|
data->quant = data->min_quant[s->type-1]; |
1066 |
|
} else if (data->quant > data->max_quant[s->type-1]) { |
1067 |
|
data->quant = data->max_quant[s->type-1]; |
1068 |
|
} |
1069 |
|
|
1070 |
|
/* |
1071 |
|
* To avoid big quality jumps from frame to frame, we apply a "security" |
1072 |
|
* rule that makes |last_quant - new_quant| <= 2. This rule only applies |
1073 |
|
* to predicted frames (P and B) |
1074 |
|
*/ |
1075 |
|
if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) { |
1076 |
|
|
1077 |
|
if (data->quant > rc->last_quant[s->type-1] + 2) { |
1078 |
|
data->quant = rc->last_quant[s->type-1] + 2; |
1079 |
|
DPRINTF(XVID_DEBUG_RC, |
1080 |
|
"[%i] p/b-frame quantizer prevented from rising too steeply\n", |
1081 |
|
data->frame_num); |
1082 |
|
} |
1083 |
|
if (data->quant < rc->last_quant[s->type-1] - 2) { |
1084 |
|
data->quant = rc->last_quant[s->type-1] - 2; |
1085 |
|
DPRINTF(XVID_DEBUG_RC, |
1086 |
|
"[%i] p/b-frame quantizer prevented from falling too steeply\n", |
1087 |
|
data->frame_num); |
1088 |
|
} |
1089 |
|
} |
1090 |
|
|
1091 |
|
/* |
1092 |
|
* We don't want to pollute the RC history results when our computed quant |
1093 |
|
* has been computed from a capped frame size |
1094 |
|
*/ |
1095 |
|
if (capped_to_max_framesize == 0) { |
1096 |
|
rc->last_quant[s->type-1] = data->quant; |
1097 |
|
} |
1098 |
|
|
1099 |
|
return 0; |
1100 |
|
} |
1101 |
|
|
1102 |
|
|
1103 |
|
|
1104 |
|
static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data) |
1105 |
|
{ |
1106 |
|
stat_t * s = &rc->stats[data->frame_num]; |
1107 |
|
|
1108 |
|
/* Insufficent stats data */ |
1109 |
|
if (data->frame_num >= rc->num_frames) |
1110 |
|
return 0; |
1111 |
|
|
1112 |
|
rc->quant_count[data->quant]++; |
1113 |
|
|
1114 |
|
if (data->type == XVID_TYPE_IVOP) { |
1115 |
|
int kfdiff = (rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1]); |
1116 |
|
|
1117 |
|
rc->overflow += rc->KFoverflow; |
1118 |
|
rc->KFoverflow = s->desired_length - data->length; |
1119 |
|
|
1120 |
|
if (kfdiff > 1) { // non-consecutive keyframes |
1121 |
|
rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1); |
1122 |
|
}else{ // consecutive keyframes |
1123 |
|
rc->overflow += rc->KFoverflow; |
1124 |
|
rc->KFoverflow = 0; |
1125 |
|
rc->KFoverflow_partial = 0; |
1126 |
|
} |
1127 |
|
rc->KF_idx++; |
1128 |
|
}else{ |
1129 |
|
// distribute part of the keyframe overflow |
1130 |
|
rc->overflow += s->desired_length - data->length + rc->KFoverflow_partial; |
1131 |
|
rc->KFoverflow -= rc->KFoverflow_partial; |
1132 |
|
} |
1133 |
|
|
1134 |
|
DPRINTF(XVID_DEBUG_RC, "[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
1135 |
|
data->frame_num, |
1136 |
|
data->quant, |
1137 |
|
s->length, |
1138 |
|
s->scaled_length, |
1139 |
|
data->length, |
1140 |
|
rc->overflow); |
1141 |
|
|
1142 |
|
return(0); |
1143 |
|
} |
1144 |
|
|
1145 |
|
|
1146 |
|
|
1147 |
|
int xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2) |
1148 |
|
{ |
1149 |
|
switch(opt) |
1150 |
|
{ |
1151 |
|
case XVID_PLG_INFO : |
1152 |
|
return 0; |
1153 |
|
|
1154 |
|
case XVID_PLG_CREATE : |
1155 |
|
return rc_2pass2_create((xvid_plg_create_t*)param1, param2); |
1156 |
|
|
1157 |
|
case XVID_PLG_DESTROY : |
1158 |
|
return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1); |
1159 |
|
|
1160 |
|
case XVID_PLG_BEFORE : |
1161 |
|
return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
1162 |
|
|
1163 |
|
case XVID_PLG_AFTER : |
1164 |
|
return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
1165 |
|
} |
1166 |
|
|
1167 |
|
return XVID_ERR_FAIL; |
1168 |
|
} |