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* XviD Bit Rate Controller Library |
* XviD Bit Rate Controller Library |
4 |
* - VBR 2 pass bitrate controler implementation - |
* - VBR 2 pass bitrate controler implementation - |
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* |
* |
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* Copyright (C) 2002 Edouard Gomez <ed.gomez@wanadoo.fr> |
* 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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* The curve treatment algorithm is the one implemented by Foxer <email?> and |
* This curve treatment algorithm is the one originally implemented by Foxer |
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* Dirk Knop <dknop@gwdg.de> for the XviD vfw dynamic library. |
* 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 |
* 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 |
* it under the terms of the GNU General Public License as published by |
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#include <stdio.h> |
#include <stdio.h> |
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#include <math.h> |
#include <math.h> |
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#include <limits.h> |
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#define RAD2DEG 57.295779513082320876798154814105 |
#define RAD2DEG 57.295779513082320876798154814105 |
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#define DEG2RAD 0.017453292519943295769236907684886 |
#define DEG2RAD 0.017453292519943295769236907684886 |
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int blks[3]; /* k,m,y blks */ |
int blks[3]; /* k,m,y blks */ |
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int length; /* first pass length */ |
int length; /* first pass length */ |
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int scaled_length; /* scaled length */ |
int scaled_length; /* scaled length */ |
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int desired_length; |
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; |
} stat_t; |
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/* constant statistical data */ |
/* constant statistical data */ |
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int num_frames; |
int num_frames; |
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int num_keyframes; |
int num_keyframes; |
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uint64_t target; /* target bitrate */ |
uint64_t target; /* target filesize */ |
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int count[3]; /* count of each frame types */ |
int count[3]; /* count of each frame types */ |
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uint64_t tot_length[3]; /* total length of each frame types */ |
uint64_t tot_length[3]; /* total length of each frame types */ |
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uint64_t tot_scaled_length[3]; /* total scaled length of each frame type */ |
uint64_t tot_scaled_length[3]; /* total scaled length of each frame type */ |
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int max_length; /* max frame size */ |
int max_length; /* max frame size */ |
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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; |
double curve_comp_scale; |
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double movie_curve; |
double movie_curve; |
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int KFoverflow; |
int KFoverflow; |
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int KFoverflow_partial; |
int KFoverflow_partial; |
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int KF_idx; |
int KF_idx; |
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double fq_error; |
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} rc_2pass2_t; |
} rc_2pass2_t; |
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} |
} |
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/* scale the curve */ |
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static void internal_scale(rc_2pass2_t *rc) |
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{ |
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int64_t target = rc->target; |
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int64_t tot_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2]; |
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int min_size[3]; |
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double scaler; |
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int i; |
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if (target <= 0 || target >= tot_length) { |
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printf("undersize warning\n"); |
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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 force the |
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frame size to the minimum, and deduct the original & scaled frmae length from the |
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original and target total lengths */ |
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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)tot_length; |
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//printf("target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)tot_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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len = (int)((double)s->length * scaler); |
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if (len < min_size[s->type]) { /* force frame size */ |
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s->scaled_length = min_size[s->type]; |
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target -= s->scaled_length; |
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tot_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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if (target <= 0 || target >= tot_length) { |
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printf("undersize warning\n"); |
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return; |
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} |
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scaler = (double)target / (double)tot_length; |
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//printf("target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)tot_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); |
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} |
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} |
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} |
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/* static void internal_scale(rc_2pass2_t *rc) |
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{ |
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const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1]; |
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const double avg_bvop = rc->avg_length[XVID_TYPE_BVOP-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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uint64_t i_total = 0; |
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double total1,total2; |
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int i; |
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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->type == XVID_TYPE_IVOP) { |
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i_total += s->length + s->length * rc->param.keyframe_boost / 100; |
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} |
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} |
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// compensate for avi frame overhead |
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rc->target_size -= rc->num_frames * 24; |
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// perform prepass to compensate for over/undersizing |
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if (rc->param.use_alt_curve) { |
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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; |
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rc->alt_curve_high = avg_pvop + avg_pvop * (double)rc->param.alt_curve_high_dist / 100.0; |
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rc->alt_curve_high_diff = rc->alt_curve_high - avg_pvop; |
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if (rc->alt_curve_use_auto) { |
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if (rc->movie_curve > 1.0) { |
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rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 / rc->movie_curve) * (double)rc->param.alt_curve_auto_str / 100.0); |
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if (rc->param.alt_curve_min_rel_qual < 20) |
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rc->param.alt_curve_min_rel_qual = 20; |
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}else{ |
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rc->param.alt_curve_min_rel_qual = 100; |
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} |
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} |
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rc->alt_curve_mid_qual = (1.0 + (double)rc->param.alt_curve_min_rel_qual / 100.0) / 2.0; |
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rc->alt_curve_qual_dev = 1.0 - rc->alt_curve_mid_qual; |
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if (rc->param.alt_curve_low_dist > 100) { |
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switch(rc->param.alt_curve_type) { |
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case XVID_CURVE_SINE : // Sine Curve (high aggressiveness) |
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rc->alt_curve_qual_dev *= 2.0 / (1.0 + sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))); |
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rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)); |
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break; |
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case XVID_CURVE_LINEAR : // Linear (medium aggressiveness) |
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rc->alt_curve_qual_dev *= 2.0 / (1.0 + avg_pvop / rc->alt_curve_low_diff); |
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rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * avg_pvop / rc->alt_curve_low_diff; |
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break; |
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case XVID_CURVE_COSINE : // Cosine Curve (low aggressiveness) |
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rc->alt_curve_qual_dev *= 2.0 / (1.0 + (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)))); |
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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))); |
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} |
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} |
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} |
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total1 = 0; |
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total2 = 0; |
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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->type != XVID_TYPE_IVOP) { |
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double dbytes = s->length / rc->movie_curve; |
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double dbytes2; |
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total1 += dbytes; |
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if (s->type == XVID_TYPE_BVOP) |
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dbytes *= avg_pvop / avg_bvop; |
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if (rc->param.use_alt_curve) { |
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if (dbytes > avg_pvop) { |
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if (dbytes >= rc->alt_curve_high) { |
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dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
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}else{ |
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switch(rc->param.alt_curve_type){ |
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case XVID_CURVE_SINE : |
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dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_high_diff))); |
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break; |
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case XVID_CURVE_LINEAR : |
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dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - avg_pvop) / rc->alt_curve_high_diff); |
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break; |
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case XVID_CURVE_COSINE : |
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dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_high_diff)))); |
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} |
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} |
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}else{ |
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if (dbytes <= rc->alt_curve_low){ |
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dbytes2 = dbytes; |
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}else{ |
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switch(rc->param.alt_curve_type){ |
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case XVID_CURVE_SINE : |
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dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_low_diff))); |
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break; |
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case XVID_CURVE_LINEAR : |
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dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - avg_pvop) / rc->alt_curve_low_diff); |
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break; |
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case XVID_CURVE_COSINE : |
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dbytes2 = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_low_diff)))); |
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} |
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} |
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} |
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}else{ |
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if (dbytes > avg_pvop) { |
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dbytes2 = ((double)dbytes + (avg_pvop - dbytes) * |
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rc->param.curve_compression_high / 100.0); |
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}else{ |
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dbytes2 = ((double)dbytes + (avg_pvop - dbytes) * |
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rc->param.curve_compression_low / 100.0); |
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} |
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} |
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if (s->type == XVID_TYPE_BVOP) { |
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dbytes2 *= avg_bvop / avg_pvop; |
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} |
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if (dbytes2 < rc->min_length[s->type-1]) { |
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dbytes = rc->min_length[s->type-1]; |
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} |
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total2 += dbytes2; |
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} |
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} |
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rc->curve_comp_scale = total1 / total2; |
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if (!rc->param.use_alt_curve) { |
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printf("middle frame size for asymmetric curve compression: %i", |
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(int)(avg_pvop * rc->curve_comp_scale)); |
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} |
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}*/ |
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/* open stats file(s) and read into rc->stats array */ |
/* open stats file(s) and read into rc->stats array */ |
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}else if (type == 'b') { |
}else if (type == 'b') { |
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s->type = XVID_TYPE_BVOP; |
s->type = XVID_TYPE_BVOP; |
177 |
}else{ /* unknown type */ |
}else{ /* unknown type */ |
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printf("unk\n"); |
DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n"); |
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continue; |
s->type = XVID_TYPE_PVOP; |
180 |
} |
} |
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i++; |
i++; |
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} |
} |
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rc->num_frames = i; |
rc->num_frames = i; |
186 |
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fclose(f); |
fclose(f); |
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#if 0 |
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static void print_stats(rc_2pass2_t * rc) |
static void print_stats(rc_2pass2_t * rc) |
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{ |
{ |
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int i; |
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++) { |
for (i = 0; i < rc->num_frames; i++) { |
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stat_t * s = &rc->stats[i]; |
stat_t * s = &rc->stats[i]; |
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printf("%i %i %i %i\n", s->type, s->quant, s->length, s->scaled_length); |
DPRINTF(XVID_DEBUG_RC, "%d %d %d %d\n", s->type, s->quant, s->length, s->scaled_length); |
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} |
} |
203 |
} |
} |
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#endif |
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/* pre-process the statistics data |
/* pre-process the statistics data |
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this is a clone of vfw/src/2pass.c:codec_2pass_init minus file reading, alt_curve, internal scale |
- 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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void pre_process0(rc_2pass2_t * rc) |
static void |
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pre_process0(rc_2pass2_t * rc) |
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{ |
{ |
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int i,j; |
int i,j; |
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rc->count[i]=0; |
rc->count[i]=0; |
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rc->tot_length[i] = 0; |
rc->tot_length[i] = 0; |
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rc->last_quant[i] = 0; |
rc->last_quant[i] = 0; |
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rc->min_length[i] = INT_MAX; |
221 |
} |
} |
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for (i=0; i<32;i++) { |
rc->max_length = INT_MIN; |
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rc->pquant_error[i] = 0; |
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rc->bquant_error[i] = 0; |
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rc->quant_count[i] = 0; |
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} |
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for (i=j=0; i<rc->num_frames; i++) { |
for (i=j=0; i<rc->num_frames; i++) { |
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stat_t * s = &rc->stats[i]; |
stat_t * s = &rc->stats[i]; |
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rc->count[s->type-1]++; |
rc->count[s->type-1]++; |
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rc->tot_length[s->type-1] += s->length; |
rc->tot_length[s->type-1] += s->length; |
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if (i == 0 || s->length < rc->min_length[s->type-1]) { |
if (s->length < rc->min_length[s->type-1]) { |
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rc->min_length[s->type-1] = s->length; |
rc->min_length[s->type-1] = s->length; |
233 |
} |
} |
234 |
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if (i == 0 || s->length > rc->max_length) { |
if (s->length > rc->max_length) { |
236 |
rc->max_length = s->length; |
rc->max_length = s->length; |
237 |
} |
} |
238 |
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j++; |
j++; |
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} |
} |
243 |
} |
} |
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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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*/ |
251 |
rc->keyframe_locations[j] = i; |
rc->keyframe_locations[j] = i; |
252 |
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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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258 |
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259 |
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/* calculate zone weight "center" */ |
260 |
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static void |
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zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create) |
263 |
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{ |
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int i,j; |
265 |
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int n = 0; |
266 |
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267 |
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rc->avg_weight = 0.0; |
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rc->tot_quant = 0; |
269 |
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270 |
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271 |
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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; |
275 |
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} |
276 |
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rc->avg_weight += rc->num_frames * 1.0; |
277 |
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n += rc->num_frames; |
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} |
279 |
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280 |
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281 |
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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; |
284 |
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285 |
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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; |
288 |
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rc->stats[j].weight = 1.0; |
289 |
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} |
290 |
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rc->avg_weight += create->zones[i].frame * 1.0; |
291 |
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n += create->zones[i].frame; |
292 |
} |
} |
293 |
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294 |
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if (create->zones[i].mode == XVID_ZONE_WEIGHT) { |
295 |
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for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
296 |
|
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
297 |
|
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
298 |
|
} |
299 |
|
next -= create->zones[i].frame; |
300 |
|
rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base; |
301 |
|
n += next; |
302 |
|
}else{ // XVID_ZONE_QUANT |
303 |
|
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
304 |
|
rc->stats[j].zone_mode = XVID_ZONE_QUANT; |
305 |
|
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
306 |
|
rc->tot_quant += rc->stats[j].length; |
307 |
|
} |
308 |
|
} |
309 |
|
} |
310 |
|
rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0; |
311 |
|
|
312 |
|
DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames); fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant); |
313 |
|
} |
314 |
|
|
315 |
void pre_process1(rc_2pass2_t * rc) |
|
316 |
|
/* scale the curve */ |
317 |
|
|
318 |
|
static void |
319 |
|
internal_scale(rc_2pass2_t *rc) |
320 |
|
{ |
321 |
|
int64_t target = rc->target - rc->tot_quant; |
322 |
|
int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant; |
323 |
|
int min_size[3]; |
324 |
|
double scaler; |
325 |
|
int i; |
326 |
|
|
327 |
|
|
328 |
|
/* |
329 |
|
* Perform an initial scale pass. |
330 |
|
* if a frame size is scaled underneath our hardcoded minimums, then we |
331 |
|
* force the frame size to the minimum, and deduct the original & scaled |
332 |
|
* frame length from the original and target total lengths |
333 |
|
*/ |
334 |
|
|
335 |
|
min_size[0] = ((rc->stats[0].blks[0]*22) + 240) / 8; |
336 |
|
min_size[1] = (rc->stats[0].blks[0] + 88) / 8; |
337 |
|
min_size[2] = 8; |
338 |
|
|
339 |
|
scaler = (double)target / (double)pass1_length; |
340 |
|
|
341 |
|
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
342 |
|
DPRINTF(XVID_DEBUG_RC, "undersize warning\n"); |
343 |
|
scaler = 1.0; |
344 |
|
} |
345 |
|
|
346 |
|
DPRINTF(XVID_DEBUG_RC, |
347 |
|
"Before any correction: target=%i, tot_length=%i, scaler=%f\n", |
348 |
|
(int)target, (int)pass1_length, scaler); |
349 |
|
|
350 |
|
for (i=0; i<rc->num_frames; i++) { |
351 |
|
stat_t * s = &rc->stats[i]; |
352 |
|
int len; |
353 |
|
|
354 |
|
if (s->zone_mode == XVID_ZONE_QUANT) { |
355 |
|
s->scaled_length = s->length; |
356 |
|
}else { |
357 |
|
len = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
358 |
|
if (len < min_size[s->type-1]) { /* force frame size */ |
359 |
|
s->scaled_length = min_size[s->type-1]; |
360 |
|
target -= s->scaled_length; |
361 |
|
pass1_length -= s->length; |
362 |
|
}else{ |
363 |
|
s->scaled_length = 0; |
364 |
|
} |
365 |
|
} |
366 |
|
} |
367 |
|
|
368 |
|
scaler = (double)target / (double)pass1_length; |
369 |
|
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
370 |
|
DPRINTF(XVID_DEBUG_RC,"undersize warning\n"); |
371 |
|
scaler = 1.0; |
372 |
|
} |
373 |
|
|
374 |
|
DPRINTF(XVID_DEBUG_RC, |
375 |
|
"After correction: target=%i, tot_length=%i, scaler=%f\n", |
376 |
|
(int)target, (int)pass1_length, scaler); |
377 |
|
|
378 |
|
for (i=0; i<rc->num_frames; i++) { |
379 |
|
stat_t * s = &rc->stats[i]; |
380 |
|
|
381 |
|
if (s->scaled_length==0) { /* ignore frame with forced frame sizes */ |
382 |
|
s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
383 |
|
} |
384 |
|
} |
385 |
|
} |
386 |
|
|
387 |
|
|
388 |
|
|
389 |
|
|
390 |
|
static void |
391 |
|
pre_process1(rc_2pass2_t * rc) |
392 |
{ |
{ |
393 |
int i; |
int i; |
394 |
double total1, total2; |
double total1, total2; |
541 |
rc->curve_comp_scale = total1 / total2; |
rc->curve_comp_scale = total1 / total2; |
542 |
|
|
543 |
if (!rc->param.use_alt_curve) { |
if (!rc->param.use_alt_curve) { |
544 |
printf("middle frame size for asymmetric curve compression: %i\n", |
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)); |
(int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale)); |
546 |
} |
} |
547 |
|
|
558 |
|
|
559 |
/* special info for alt curve: bias bonus and quantizer thresholds */ |
/* special info for alt curve: bias bonus and quantizer thresholds */ |
560 |
|
|
561 |
printf("avg scaled framesize:%i", (int)rc->avg_length[XVID_TYPE_PVOP-1]); |
DPRINTF(XVID_DEBUG_RC, "avg scaled framesize:%i\n", (int)rc->avg_length[XVID_TYPE_PVOP-1]); |
562 |
printf("bias bonus:%i bytes", (int)rc->alt_curve_curve_bias_bonus); |
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++) { |
for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) { |
565 |
double curve_temp, dbytes; |
double curve_temp, dbytes; |
608 |
if (newquant != oldquant) { |
if (newquant != oldquant) { |
609 |
int percent = (int)((i - rc->avg_length[XVID_TYPE_PVOP-1]) * 100.0 / rc->avg_length[XVID_TYPE_PVOP-1]); |
int percent = (int)((i - rc->avg_length[XVID_TYPE_PVOP-1]) * 100.0 / rc->avg_length[XVID_TYPE_PVOP-1]); |
610 |
oldquant = newquant; |
oldquant = newquant; |
611 |
printf("quant:%i threshold at %i : %i percent", newquant, i, percent); |
DPRINTF(XVID_DEBUG_RC, "quant:%i threshold at %i : %i percent\n", newquant, i, percent); |
612 |
} |
} |
613 |
} |
} |
614 |
} |
} |
628 |
{ |
{ |
629 |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
630 |
rc_2pass2_t * rc; |
rc_2pass2_t * rc; |
631 |
|
int i; |
632 |
|
|
633 |
rc = malloc(sizeof(rc_2pass2_t)); |
rc = malloc(sizeof(rc_2pass2_t)); |
634 |
if (rc == NULL) |
if (rc == NULL) |
659 |
if (rc->param.min_key_interval <= 0) rc->param.min_key_interval = 300; |
if (rc->param.min_key_interval <= 0) rc->param.min_key_interval = 300; |
660 |
|
|
661 |
if (!det_stats_length(rc, param->filename)){ |
if (!det_stats_length(rc, param->filename)){ |
662 |
DPRINTF(DPRINTF_RC,"fopen %s failed\n", param->filename); |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
663 |
free(rc); |
free(rc); |
664 |
return XVID_ERR_FAIL; |
return XVID_ERR_FAIL; |
665 |
} |
} |
669 |
return XVID_ERR_MEMORY; |
return XVID_ERR_MEMORY; |
670 |
} |
} |
671 |
|
|
672 |
/* XXX: do we need an addition location */ |
/* |
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) { |
if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) { |
679 |
free(rc->stats); |
free(rc->stats); |
680 |
free(rc); |
free(rc); |
682 |
} |
} |
683 |
|
|
684 |
if (!load_stats(rc, param->filename)) { |
if (!load_stats(rc, param->filename)) { |
685 |
DPRINTF(DPRINTF_RC,"fopen %s failed\n", param->filename); |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
686 |
free(rc->keyframe_locations); |
free(rc->keyframe_locations); |
687 |
free(rc->stats); |
free(rc->stats); |
688 |
free(rc); |
free(rc); |
691 |
|
|
692 |
/* pre-process our stats */ |
/* pre-process our stats */ |
693 |
|
|
|
{ |
|
694 |
if (rc->num_frames < create->fbase/create->fincr) { |
if (rc->num_frames < create->fbase/create->fincr) { |
695 |
rc->target = rc->param.bitrate / 8; /* one second */ |
rc->target = rc->param.bitrate / 8; /* one second */ |
696 |
}else{ |
}else{ |
697 |
rc->target = (rc->param.bitrate * rc->num_frames * create->fincr) / (create->fbase * 8); |
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 |
|
#if 0 |
708 |
rc->target -= rc->num_frames*24; /* avi file header */ |
rc->target -= rc->num_frames*24; /* avi file header */ |
709 |
|
#endif |
|
} |
|
710 |
|
|
711 |
|
|
712 |
pre_process0(rc); |
pre_process0(rc); |
713 |
|
|
714 |
if (rc->param.bitrate) { |
if (rc->param.bitrate) { |
715 |
|
zone_process(rc, create); |
716 |
internal_scale(rc); |
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 |
pre_process1(rc);pre_process1(rc);pre_process1(rc); |
|
734 |
|
rc->fq_error = 0; |
735 |
|
|
736 |
*handle = rc; |
*handle = rc; |
737 |
return(0); |
return(0); |
757 |
double curve_temp; |
double curve_temp; |
758 |
int capped_to_max_framesize = 0; |
int capped_to_max_framesize = 0; |
759 |
|
|
760 |
if (data->frame_num >= rc->num_frames) { |
/* |
761 |
/* insufficent stats data */ |
* This function is quite long but easy to understand. In order to simplify |
762 |
return 0; |
* 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 |
overflow = rc->overflow / 8; /* XXX: why by 8 */ |
/* Third case: insufficent stats data */ |
783 |
|
if (data->frame_num >= rc->num_frames) |
784 |
|
return 0; |
785 |
|
|
786 |
if (s->type == XVID_TYPE_IVOP) { /* XXX: why */ |
/* |
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; |
overflow = 0; |
800 |
} |
} |
801 |
|
|
807 |
} |
} |
808 |
dbytes /= rc->movie_curve; |
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) { |
if (s->type == XVID_TYPE_BVOP) { |
819 |
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
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) { |
if (rc->param.payback_method == XVID_PAYBACK_BIAS) { |
827 |
desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay); |
desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay); |
828 |
}else{ |
}else{ |
|
//printf("desired=%i, dbytes=%i\n", desired,dbytes); |
|
829 |
desired = (int)(rc->curve_comp_error * dbytes / |
desired = (int)(rc->curve_comp_error * dbytes / |
830 |
rc->avg_length[XVID_TYPE_PVOP-1] / rc->param.bitrate_payback_delay); |
rc->avg_length[XVID_TYPE_PVOP-1] / rc->param.bitrate_payback_delay); |
|
//printf("desired=%i\n", desired); |
|
831 |
|
|
832 |
if (labs(desired) > fabs(rc->curve_comp_error)) { |
if (labs(desired) > fabs(rc->curve_comp_error)) { |
833 |
desired = (int)rc->curve_comp_error; |
desired = (int)rc->curve_comp_error; |
836 |
|
|
837 |
rc->curve_comp_error -= desired; |
rc->curve_comp_error -= desired; |
838 |
|
|
839 |
/* alt curve */ |
/* |
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 |
curve_temp = 0; /* XXX: warning */ |
/* XXX: warning */ |
846 |
|
curve_temp = 0; |
847 |
|
|
848 |
if (rc->param.use_alt_curve) { |
if (rc->param.use_alt_curve) { |
849 |
if (s->type != XVID_TYPE_IVOP) { |
if (s->type != XVID_TYPE_IVOP) { |
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) |
if (s->type == XVID_TYPE_BVOP) |
888 |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
889 |
|
|
892 |
desired += ((int)curve_temp); |
desired += ((int)curve_temp); |
893 |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
894 |
}else{ |
}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) |
if (s->type == XVID_TYPE_BVOP) |
901 |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
902 |
|
|
913 |
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
914 |
} |
} |
915 |
|
|
916 |
if (s->type == XVID_TYPE_BVOP){ |
/* |
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]; |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
|
} |
|
923 |
|
|
924 |
desired += (int)curve_temp; |
desired += (int)curve_temp; |
925 |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
926 |
}else{ |
}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){ |
if (s->type == XVID_TYPE_BVOP){ |
933 |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
934 |
} |
} |
937 |
rc->curve_comp_error += dbytes - (int)dbytes; |
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){ |
if (desired > s->length){ |
947 |
rc->curve_comp_error += desired - s->length; |
rc->curve_comp_error += desired - s->length; |
948 |
desired = s->length; |
desired = s->length; |
986 |
|
|
987 |
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
988 |
|
|
989 |
// Foxer: reign in overflow with huge frames |
/* Reign in overflow with huge frames */ |
990 |
if (labs(overflow) > labs(rc->overflow)) { |
if (labs(overflow) > labs(rc->overflow)) { |
991 |
overflow = rc->overflow; |
overflow = rc->overflow; |
992 |
} |
} |
993 |
|
|
994 |
// Foxer: make sure overflow doesn't run away |
/* Make sure overflow doesn't run away */ |
|
|
|
995 |
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
996 |
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
997 |
overflow * rc->param.max_overflow_improvement / 100; |
overflow * rc->param.max_overflow_improvement / 100; |
1001 |
desired += overflow; |
desired += overflow; |
1002 |
} |
} |
1003 |
|
|
1004 |
|
/* Make sure we are not higher than desired frame size */ |
1005 |
if (desired > rc->max_length) { |
if (desired > rc->max_length) { |
1006 |
capped_to_max_framesize = 1; |
capped_to_max_framesize = 1; |
1007 |
desired = rc->max_length; |
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 |
/* Make sure to not scale below the minimum framesize */ |
1013 |
if (desired < rc->min_length[s->type-1]) { |
if (desired < rc->min_length[s->type-1]) { |
1014 |
desired = rc->min_length[s->type-1]; |
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 |
// very 'simple' quant<->filesize relationship |
* 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; |
data->quant= (s->quant * s->length) / desired; |
1024 |
|
|
1025 |
|
/* Let's clip the computed quantizer, if needed */ |
1026 |
if (data->quant < 1) { |
if (data->quant < 1) { |
1027 |
data->quant = 1; |
data->quant = 1; |
1028 |
} else if (data->quant > 31) { |
} else if (data->quant > 31) { |
1029 |
data->quant = 31; |
data->quant = 31; |
1030 |
} |
} else if (s->type != XVID_TYPE_IVOP) { |
1031 |
else if (s->type != XVID_TYPE_IVOP) |
|
1032 |
{ |
/* |
1033 |
// Foxer: aid desired quantizer precision by accumulating decision error |
* 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) { |
if (s->type== XVID_TYPE_BVOP) { |
1040 |
rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
1041 |
|
|
1053 |
} |
} |
1054 |
} |
} |
1055 |
|
|
1056 |
/* cap to min/max quant */ |
/* |
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]) { |
if (data->quant < data->min_quant[s->type-1]) { |
1065 |
data->quant = data->min_quant[s->type-1]; |
data->quant = data->min_quant[s->type-1]; |
1066 |
}else if (data->quant > data->max_quant[s->type-1]) { |
}else if (data->quant > data->max_quant[s->type-1]) { |
1067 |
data->quant = data->max_quant[s->type-1]; |
data->quant = data->max_quant[s->type-1]; |
1068 |
} |
} |
1069 |
|
|
1070 |
/* subsequent p/b frame quants can only be +- 2 */ |
/* |
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) { |
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) { |
if (data->quant > rc->last_quant[s->type-1] + 2) { |
1078 |
data->quant = rc->last_quant[s->type-1] + 2; |
data->quant = rc->last_quant[s->type-1] + 2; |
1079 |
DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from rising too steeply"); |
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) { |
if (data->quant < rc->last_quant[s->type-1] - 2) { |
1084 |
data->quant = rc->last_quant[s->type-1] - 2; |
data->quant = rc->last_quant[s->type-1] - 2; |
1085 |
DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from falling too steeply"); |
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) { |
if (capped_to_max_framesize == 0) { |
1096 |
rc->last_quant[s->type-1] = data->quant; |
rc->last_quant[s->type-1] = data->quant; |
1097 |
} |
} |
1105 |
{ |
{ |
1106 |
stat_t * s = &rc->stats[data->frame_num]; |
stat_t * s = &rc->stats[data->frame_num]; |
1107 |
|
|
1108 |
if (data->frame_num >= rc->num_frames) { |
/* Insufficent stats data */ |
1109 |
/* insufficent stats data */ |
if (data->frame_num >= rc->num_frames) |
1110 |
return 0; |
return 0; |
|
} |
|
1111 |
|
|
1112 |
rc->quant_count[data->quant]++; |
rc->quant_count[data->quant]++; |
1113 |
|
|
1131 |
rc->KFoverflow -= rc->KFoverflow_partial; |
rc->KFoverflow -= rc->KFoverflow_partial; |
1132 |
} |
} |
1133 |
|
|
1134 |
printf("[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
DPRINTF(XVID_DEBUG_RC, "[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
1135 |
data->frame_num, |
data->frame_num, |
1136 |
data->quant, |
data->quant, |
1137 |
s->length, |
s->length, |