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/****************************************************************************** |
/****************************************************************************** |
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* |
* |
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* XviD Bit Rate Controller Library |
* XviD Bit Rate Controller Library |
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* - VBR 2 pass bitrate controler implementation - |
* - VBR 2 pass bitrate controller implementation - |
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* |
* |
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* Copyright (C) 2002 Foxer <email?> |
* Copyright (C) 2002 Foxer <email?> |
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* 2002 Dirk Knop <dknop@gwdg.de> |
* 2002 Dirk Knop <dknop@gwdg.de> |
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* |
* |
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*****************************************************************************/ |
*****************************************************************************/ |
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#undef COMPENSATE_FORMULA |
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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 |
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#define DEG2RAD 0.017453292519943295769236907684886 |
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#include "../xvid.h" |
#include "../xvid.h" |
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#include "../image/image.h" |
#include "../image/image.h" |
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/***************************************************************************** |
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* Some constants |
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****************************************************************************/ |
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#define DEFAULT_KEYFRAME_BOOST 0 |
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#define DEFAULT_OVERFLOW_CONTROL_STRENGTH 10 |
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#define DEFAULT_CURVE_COMPRESSION_HIGH 0 |
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#define DEFAULT_CURVE_COMPRESSION_LOW 0 |
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#define DEFAULT_MAX_OVERFLOW_IMPROVEMENT 60 |
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#define DEFAULT_MAX_OVERFLOW_DEGRADATION 60 |
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/* Keyframe settings */ |
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#define DEFAULT_KFREDUCTION 20 |
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#define DEFAULT_KFTHRESHOLD 1 |
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/***************************************************************************** |
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* Structures |
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****************************************************************************/ |
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/* Statistics */ |
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typedef struct { |
typedef struct { |
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int type; /* first pass type */ |
int type; /* first pass type */ |
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int quant; /* first pass quant */ |
int quant; /* first pass quant */ |
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int quant2; /* Second pass quant */ |
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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; /* desired length; calcuated during encoding */ |
int desired_length; /* desired length; calculated during encoding */ |
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int error; |
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int zone_mode; /* XVID_ZONE_xxx */ |
int zone_mode; /* XVID_ZONE_xxx */ |
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double weight; |
double weight; |
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} stat_t; |
} twopass_stat_t; |
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/* Context struct */ |
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/* context struct */ |
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typedef struct |
typedef struct |
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{ |
{ |
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xvid_plugin_2pass2_t param; |
xvid_plugin_2pass2_t param; |
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/* constant statistical data */ |
/*---------------------------------- |
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* constant statistical data |
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*--------------------------------*/ |
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/* Number of frames of the sequence */ |
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int num_frames; |
int num_frames; |
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/* Number of Intra frames of the sequence */ |
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int num_keyframes; |
int num_keyframes; |
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uint64_t target; /* target filesize */ |
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int count[3]; /* count of each frame types */ |
/* Target filesize to reach */ |
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uint64_t tot_length[3]; /* total length of each frame types */ |
uint64_t target; |
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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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/* 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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/* dynamic */ |
/* Count of each frame types */ |
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int count[3]; |
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int * keyframe_locations; |
/* Total length of each frame types (1st pass) */ |
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stat_t * stats; |
uint64_t tot_length[3]; |
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double pquant_error[32]; |
/* Average length of each frame types (used first for 1st pass data and |
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double bquant_error[32]; |
* then for scaled averages */ |
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int quant_count[32]; |
double avg_length[3]; |
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int last_quant[3]; |
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/* Minimum frame length allowed for each frame type */ |
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int min_length[3]; |
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/* Total bytes per frame type once the curve has been scaled |
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* NB: advanced parameters do not change this value. This field |
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* represents the total scaled w/o any advanced settings */ |
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uint64_t tot_scaled_length[3]; |
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/* Maximum observed frame size observed during the first pass, the RC |
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* will try tp force all frame sizes in the second pass to be under that |
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* limit */ |
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int max_length; |
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/*---------------------------------- |
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* Zones statistical data |
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* |
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* ToDo: Fix zones, current |
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* implementation is buggy |
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*--------------------------------*/ |
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/* Average weight of the zones */ |
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double avg_weight; |
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/* Total length used by XVID_ZONE_QUANT zones */ |
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int64_t tot_quant; |
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/*---------------------------------- |
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* Advanced settings helper ratios |
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*--------------------------------*/ |
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/* This the ratio that has to be applied to all p/b frames in order |
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* to reserve/retrieve bits for/from keyframe boosting and consecutive |
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* keyframe penalty */ |
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double pb_iboost_tax_ratio; |
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/* This the ratio to apply to all b/p frames in order to respect the |
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* assymetric curve compression while respecting a target filesize |
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* NB: The assymetric delta gain has to be computed before this ratio |
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* is applied, and then the delta is added to the scaled size */ |
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double assymetric_tax_ratio; |
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/*---------------------------------- |
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* Data from the stats file kept |
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* into RAM for easy access |
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*--------------------------------*/ |
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/* Array of keyframe locations |
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* eg: rc->keyframe_locations[100] returns the frame number of the 100th |
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* keyframe */ |
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int *keyframe_locations; |
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double curve_comp_error; |
/* Index of the last keyframe used in the keyframe_location */ |
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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; |
int KF_idx; |
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double fq_error; |
/* Array of all 1st pass data file -- see the twopass_stat_t structure |
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} rc_2pass2_t; |
* definition for more details */ |
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twopass_stat_t * stats; |
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/*---------------------------------- |
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* Histerysis helpers |
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*--------------------------------*/ |
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/* This field holds the int2float conversion errors of each quant per |
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* frame type, this allow the RC to keep track of rouding error and thus |
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* increase or decrease the chosen quant according to this residue */ |
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double quant_error[3][32]; |
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/* This fields stores the count of each quant usage per frame type |
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* No real role but for debugging */ |
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int quant_count[3][32]; |
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/* Last valid quantizer used per frame type, it allows quantizer |
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* increament/decreament limitation in order to avoid big image quality |
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* "jumps" */ |
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int last_quant[3]; |
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/*---------------------------------- |
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* Overflow control |
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*--------------------------------*/ |
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/* Current overflow that has to be distributed to p/b frames */ |
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double overflow; |
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/* Total overflow for keyframes -- not distributed directly */ |
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double KFoverflow; |
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/* Amount of keyframe overflow to introduce to the global p/b frame |
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* overflow counter at each encoded frame */ |
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double KFoverflow_partial; |
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/* Unknown ??? |
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* ToDo: description */ |
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double fq_error; |
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#define BUF_SZ 1024 |
/*---------------------------------- |
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#define MAX_COLS 5 |
* Debug |
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*--------------------------------*/ |
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double desired_total; |
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double real_total; |
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} rc_2pass2_t; |
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/* open stats file, and count num frames */ |
/***************************************************************************** |
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* Sub plugin functions prototypes |
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****************************************************************************/ |
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static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle); |
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static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data); |
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static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data); |
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static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy); |
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/***************************************************************************** |
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* Plugin definition |
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****************************************************************************/ |
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static int det_stats_length(rc_2pass2_t * rc, char * filename) |
int |
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xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2) |
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{ |
{ |
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FILE * f; |
switch(opt) { |
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int n, ignore; |
case XVID_PLG_INFO : |
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char type; |
case XVID_PLG_FRAME : |
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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; |
return 0; |
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while((n = fscanf(f, "%c %d %d %d %d %d %d\n", |
case XVID_PLG_CREATE : |
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&type, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) { |
return rc_2pass2_create((xvid_plg_create_t*)param1, param2); |
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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); |
case XVID_PLG_DESTROY : |
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return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1); |
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return 1; |
case XVID_PLG_BEFORE : |
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return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
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case XVID_PLG_AFTER : |
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return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
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} |
} |
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return XVID_ERR_FAIL; |
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} |
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/***************************************************************************** |
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* Sub plugin functions definitions |
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****************************************************************************/ |
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/* First a few local helping function prototypes */ |
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static int statsfile_count_frames(rc_2pass2_t * rc, char * filename); |
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static int statsfile_load(rc_2pass2_t *rc, char * filename); |
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static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create); |
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static void first_pass_stats_prepare_data(rc_2pass2_t * rc); |
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static void first_pass_scale_curve_internal(rc_2pass2_t *rc); |
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static void scaled_curve_apply_advanced_parameters(rc_2pass2_t * rc); |
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#if 0 |
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static void stats_print(rc_2pass2_t * rc); |
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#endif |
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/* open stats file(s) and read into rc->stats array */ |
/*---------------------------------------------------------------------------- |
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*--------------------------------------------------------------------------*/ |
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static int load_stats(rc_2pass2_t *rc, char * filename) |
static int |
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rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t **handle) |
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{ |
{ |
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FILE * f; |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
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int i, not_scaled; |
rc_2pass2_t * rc; |
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int i; |
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rc = malloc(sizeof(rc_2pass2_t)); |
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if (rc == NULL) |
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return XVID_ERR_MEMORY; |
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if ((f = fopen(filename, "rt"))==NULL) |
rc->param = *param; |
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return 0; |
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i = 0; |
/* Initialize all defaults */ |
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not_scaled = 0; |
#define _INIT(a, b) if((a) <= 0) (a) = (b) |
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while(i < rc->num_frames) { |
/* Let's set our defaults if needed */ |
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stat_t * s = &rc->stats[i]; |
_INIT(rc->param.keyframe_boost, DEFAULT_KEYFRAME_BOOST); |
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int n; |
_INIT(rc->param.overflow_control_strength, DEFAULT_OVERFLOW_CONTROL_STRENGTH); |
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char type; |
_INIT(rc->param.curve_compression_high, DEFAULT_CURVE_COMPRESSION_HIGH); |
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_INIT(rc->param.curve_compression_low, DEFAULT_CURVE_COMPRESSION_LOW); |
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_INIT(rc->param.max_overflow_improvement, DEFAULT_MAX_OVERFLOW_IMPROVEMENT); |
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_INIT(rc->param.max_overflow_degradation, DEFAULT_MAX_OVERFLOW_DEGRADATION); |
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/* Keyframe settings */ |
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_INIT(rc->param.kfreduction, DEFAULT_KFREDUCTION); |
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_INIT(rc->param.kfthreshold, DEFAULT_KFTHRESHOLD); |
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#undef _INIT |
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s->scaled_length = 0; |
/* Initialize some stuff to zero */ |
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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); |
for(i=0; i<3; i++) { |
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if (n == EOF) break; |
int j; |
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if (n < 7) { |
for (j=0; j<32; j++) { |
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not_scaled = 1; |
rc->quant_error[i][j] = 0; |
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rc->quant_count[i][j] = 0; |
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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"); |
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s->type = XVID_TYPE_PVOP; |
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} |
} |
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i++; |
for (i=0; i<3; i++) rc->last_quant[i] = 0; |
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} |
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rc->num_frames = i; |
rc->fq_error = 0; |
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fclose(f); |
/* Count frames (and intra frames) in the stats file, store the result into |
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* the rc structure */ |
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if (statsfile_count_frames(rc, param->filename) == -1) { |
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DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- ERROR: fopen %s failed\n", param->filename); |
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free(rc); |
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return(XVID_ERR_FAIL); |
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} |
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return 1; |
/* Allocate the stats' memory */ |
310 |
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if ((rc->stats = malloc(rc->num_frames * sizeof(twopass_stat_t))) == NULL) { |
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free(rc); |
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return(XVID_ERR_MEMORY); |
313 |
} |
} |
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/* Allocate keyframes location's memory |
316 |
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* PS: see comment in pre_process0 for the +1 location requirement */ |
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rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int)); |
318 |
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if (rc->keyframe_locations == NULL) { |
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free(rc->stats); |
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free(rc); |
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return(XVID_ERR_MEMORY); |
322 |
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} |
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/* Load the first pass stats */ |
325 |
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if (statsfile_load(rc, param->filename) == -1) { |
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DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- ERROR: fopen %s failed\n", param->filename); |
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free(rc->keyframe_locations); |
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free(rc->stats); |
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free(rc); |
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return XVID_ERR_FAIL; |
331 |
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} |
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#if 0 |
/* Compute the target filesize */ |
334 |
static void print_stats(rc_2pass2_t * rc) |
if (rc->param.bitrate<0) { |
335 |
{ |
/* if negative, bitrate equals the target (in kbytes) */ |
336 |
int i; |
rc->target = ((uint64_t)(-rc->param.bitrate)) * 1024; |
337 |
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} else if (rc->num_frames < create->fbase/create->fincr) { |
338 |
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/* Source sequence is less than 1s long, we do as if it was 1s long */ |
339 |
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rc->target = rc->param.bitrate / 8; |
340 |
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} else { |
341 |
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/* Target filesize = bitrate/8 * numframes / framerate */ |
342 |
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rc->target = |
343 |
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((uint64_t)rc->param.bitrate * (uint64_t)rc->num_frames * \ |
344 |
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(uint64_t)create->fincr) / \ |
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((uint64_t)create->fbase * 8); |
346 |
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} |
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DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Frame rate: %d/%d (%ffps)\n", |
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create->fbase, create->fincr, |
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(double)create->fbase/(double)create->fincr); |
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DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Number of frames: %d\n", rc->num_frames); |
352 |
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if(rc->param.bitrate>=0) |
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DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Target bitrate: %ld\n", rc->param.bitrate); |
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DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Target filesize: %lld\n", rc->target); |
355 |
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356 |
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/* Compensate the average frame overhead caused by the container */ |
357 |
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rc->target -= rc->num_frames*rc->param.container_frame_overhead; |
358 |
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DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Container Frame overhead: %d\n", rc->param.container_frame_overhead); |
359 |
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if(rc->param.container_frame_overhead) |
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DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- New target filesize after container compensation: %lld\n", rc->target); |
361 |
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362 |
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/* Gathers some information about first pass stats: |
363 |
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* - finds the minimum frame length for each frame type during 1st pass. |
364 |
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* rc->min_size[] |
365 |
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* - determines the maximum frame length observed (no frame type distinction). |
366 |
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* rc->max_size |
367 |
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* - count how many times each frame type has been used. |
368 |
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* rc->count[] |
369 |
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* - total bytes used per frame type |
370 |
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* rc->total[] |
371 |
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* - store keyframe location |
372 |
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* rc->keyframe_locations[] |
373 |
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*/ |
374 |
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first_pass_stats_prepare_data(rc); |
375 |
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376 |
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/* When bitrate is not given it means it has been scaled by an external |
377 |
|
* application */ |
378 |
|
if (rc->param.bitrate) { |
379 |
|
/* Apply zone settings */ |
380 |
|
zone_process(rc, create); |
381 |
|
/* Perform internal curve scaling */ |
382 |
|
first_pass_scale_curve_internal(rc); |
383 |
|
} else { |
384 |
|
/* External scaling -- zones are ignored */ |
385 |
for (i = 0; i < rc->num_frames; i++) { |
for (i = 0; i < rc->num_frames; i++) { |
386 |
stat_t * s = &rc->stats[i]; |
rc->stats[i].zone_mode = XVID_ZONE_WEIGHT; |
387 |
DPRINTF(XVID_DEBUG_RC, "%i %i %i %i\n", s->type, s->quant, s->length, s->scaled_length); |
rc->stats[i].weight = 1.0; |
388 |
} |
} |
389 |
|
rc->avg_weight = 1.0; |
390 |
|
rc->tot_quant = 0; |
391 |
} |
} |
|
#endif |
|
392 |
|
|
393 |
/* pre-process the statistics data |
/* Apply advanced curve options, and compute some parameters in order to |
394 |
- for each type, count, tot_length, min_length, max_length |
* shape the curve in the BEFORE/AFTER pair of functions */ |
395 |
- set keyframes_locations |
scaled_curve_apply_advanced_parameters(rc); |
396 |
*/ |
|
397 |
|
*handle = rc; |
398 |
|
return(0); |
399 |
|
} |
400 |
|
|
401 |
void pre_process0(rc_2pass2_t * rc) |
/*---------------------------------------------------------------------------- |
402 |
|
*--------------------------------------------------------------------------*/ |
403 |
|
|
404 |
|
static int |
405 |
|
rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy) |
406 |
{ |
{ |
407 |
int i,j; |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- target_total:%lld desired_total:%.2f (%.2f%%) actual_total:%.2f (%.2f%%)\n", |
408 |
|
rc->target, |
409 |
|
rc->desired_total, |
410 |
|
100*rc->desired_total/(double)rc->target, |
411 |
|
rc->real_total, |
412 |
|
100*rc->real_total/(double)rc->target); |
413 |
|
|
414 |
for (i=0; i<3; i++) { |
free(rc->keyframe_locations); |
415 |
rc->count[i]=0; |
free(rc->stats); |
416 |
rc->tot_length[i] = 0; |
free(rc); |
417 |
rc->last_quant[i] = 0; |
return(0); |
418 |
} |
} |
419 |
|
|
420 |
for (i=j=0; i<rc->num_frames; i++) { |
/*---------------------------------------------------------------------------- |
421 |
stat_t * s = &rc->stats[i]; |
*--------------------------------------------------------------------------*/ |
422 |
|
|
423 |
rc->count[s->type-1]++; |
static int |
424 |
rc->tot_length[s->type-1] += s->length; |
rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data) |
425 |
|
{ |
426 |
|
twopass_stat_t * s = &rc->stats[data->frame_num]; |
427 |
|
double dbytes; |
428 |
|
double scaled_quant; |
429 |
|
double overflow; |
430 |
|
int capped_to_max_framesize = 0; |
431 |
|
|
432 |
if (i == 0 || s->length < rc->min_length[s->type-1]) { |
/* This function is quite long but easy to understand. In order to simplify |
433 |
rc->min_length[s->type-1] = s->length; |
* the code path (a bit), we treat 3 cases that can return immediatly. */ |
|
} |
|
434 |
|
|
435 |
if (i == 0 || s->length > rc->max_length) { |
/* First case: Another plugin has already set a quantizer */ |
436 |
rc->max_length = s->length; |
if (data->quant > 0) |
437 |
} |
return(0); |
438 |
|
|
439 |
if (s->type == XVID_TYPE_IVOP) { |
/* Second case: insufficent stats data */ |
440 |
rc->keyframe_locations[j] = i; |
if (data->frame_num >= rc->num_frames) { |
441 |
j++; |
DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- stats file too short (now processing frame %d)", |
442 |
} |
data->frame_num); |
443 |
|
return(0); |
444 |
} |
} |
445 |
|
|
446 |
/* |
/* Third case: We are in a Quant zone */ |
447 |
* The "per sequence" overflow system considers a natural sequence to be |
if (s->zone_mode == XVID_ZONE_QUANT) { |
448 |
* formed by all frames between two iframes, so if we want to make sure |
rc->fq_error += s->weight; |
449 |
* the system does not go nuts during last sequence, we force the last |
data->quant = (int)rc->fq_error; |
450 |
* frame to appear in the keyframe locations array. |
rc->fq_error -= data->quant; |
451 |
*/ |
|
452 |
rc->keyframe_locations[j] = i; |
s->desired_length = s->length; |
453 |
|
|
454 |
|
return(0); |
455 |
} |
} |
456 |
|
|
457 |
|
|
458 |
/* calculate zone weight "center" */ |
/*************************************************************************/ |
459 |
|
/*************************************************************************/ |
460 |
|
/*************************************************************************/ |
461 |
|
|
462 |
static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create) |
/*------------------------------------------------------------------------- |
463 |
{ |
* Frame bit allocation first part |
464 |
int i,j; |
* |
465 |
int n = 0; |
* First steps apply user settings, just like it is done in the theoritical |
466 |
|
* scaled_curve_apply_advanced_parameters |
467 |
|
*-----------------------------------------------------------------------*/ |
468 |
|
|
469 |
rc->avg_weight = 0.0; |
/* Set desired to what we are wanting to obtain for this frame */ |
470 |
rc->tot_quant = 0; |
dbytes = (double)s->scaled_length; |
471 |
|
|
472 |
|
/* IFrame user settings*/ |
473 |
|
if (s->type == XVID_TYPE_IVOP) { |
474 |
|
/* Keyframe boosting -- All keyframes benefit from it */ |
475 |
|
dbytes += dbytes*rc->param.keyframe_boost / 100; |
476 |
|
|
477 |
|
#if 0 /* ToDo: decide how to apply kfthresholding */ |
478 |
|
#endif |
479 |
|
} else { |
480 |
|
|
481 |
if (create->num_zones == 0) { |
/* P/S/B frames must reserve some bits for iframe boosting */ |
482 |
for (j = 0; j < rc->num_frames; j++) { |
dbytes *= rc->pb_iboost_tax_ratio; |
483 |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
|
484 |
rc->stats[j].weight = 1.0; |
/* Apply assymetric curve compression */ |
485 |
|
if (rc->param.curve_compression_high || rc->param.curve_compression_low) { |
486 |
|
double assymetric_delta; |
487 |
|
|
488 |
|
/* Compute the assymetric delta, this is computed before applying |
489 |
|
* the tax, as done in the pre_process function */ |
490 |
|
if (dbytes > rc->avg_length[s->type-1]) |
491 |
|
assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_high / 100.0; |
492 |
|
else |
493 |
|
assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_low / 100.0; |
494 |
|
|
495 |
|
/* Now we must apply the assymetric tax, else our curve compression |
496 |
|
* would not give a theoritical target size equal to what it is |
497 |
|
* expected */ |
498 |
|
dbytes *= rc->assymetric_tax_ratio; |
499 |
|
|
500 |
|
/* Now we can add the assymetric delta */ |
501 |
|
dbytes += assymetric_delta; |
502 |
} |
} |
|
rc->avg_weight += rc->num_frames * 1.0; |
|
|
n += rc->num_frames; |
|
503 |
} |
} |
504 |
|
|
505 |
|
/* That is what we would like to have -- Don't put that chunk after |
506 |
|
* overflow control, otherwise, overflow is counted twice and you obtain |
507 |
|
* half sized bitrate sequences */ |
508 |
|
s->desired_length = (int)dbytes; |
509 |
|
rc->desired_total += dbytes; |
510 |
|
|
511 |
for(i=0; i < create->num_zones; i++) { |
/*------------------------------------------------------------------------ |
512 |
|
* Frame bit allocation: overflow control part. |
513 |
|
* |
514 |
|
* Unlike the theoritical scaled_curve_apply_advanced_parameters, here |
515 |
|
* it's real encoding and we need to make sure we don't go so far from |
516 |
|
* what is our ideal scaled curve. |
517 |
|
*-----------------------------------------------------------------------*/ |
518 |
|
|
519 |
int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames; |
/* Compute the overflow we should compensate */ |
520 |
|
if (s->type != XVID_TYPE_IVOP) { |
521 |
|
double frametype_factor; |
522 |
|
double framesize_factor; |
523 |
|
|
524 |
if (i==0 && create->zones[i].frame > 0) { |
/* Take only the desired part of overflow */ |
525 |
for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) { |
overflow = rc->overflow; |
|
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
|
|
rc->stats[j].weight = 1.0; |
|
|
} |
|
|
rc->avg_weight += create->zones[i].frame * 1.0; |
|
|
n += create->zones[i].frame; |
|
|
} |
|
526 |
|
|
527 |
if (create->zones[i].mode == XVID_ZONE_WEIGHT) { |
/* Factor that will take care to decrease the overflow applied |
528 |
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
* according to the importance of this frame type in term of |
529 |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
* overall size */ |
530 |
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
frametype_factor = rc->count[XVID_TYPE_IVOP-1]*rc->avg_length[XVID_TYPE_IVOP-1]; |
531 |
} |
frametype_factor += rc->count[XVID_TYPE_PVOP-1]*rc->avg_length[XVID_TYPE_PVOP-1]; |
532 |
next -= create->zones[i].frame; |
frametype_factor += rc->count[XVID_TYPE_BVOP-1]*rc->avg_length[XVID_TYPE_BVOP-1]; |
533 |
rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base; |
frametype_factor /= rc->count[s->type-1]*rc->avg_length[s->type-1]; |
534 |
n += next; |
frametype_factor = 1/frametype_factor; |
535 |
}else{ // XVID_ZONE_QUANT |
|
536 |
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
/* Factor that will take care not to compensate too much for this frame |
537 |
rc->stats[j].zone_mode = XVID_ZONE_QUANT; |
* size */ |
538 |
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
framesize_factor = dbytes; |
539 |
rc->tot_quant += rc->stats[j].length; |
framesize_factor /= rc->avg_length[s->type-1]; |
540 |
} |
|
541 |
|
/* Treat only the overflow part concerned by this frame type and size */ |
542 |
|
overflow *= frametype_factor; |
543 |
|
#if 0 |
544 |
|
/* Leave this one alone, as it impacts badly on quality */ |
545 |
|
overflow *= framesize_factor; |
546 |
|
#endif |
547 |
|
|
548 |
|
/* Apply the overflow strength imposed by the user */ |
549 |
|
overflow *= (rc->param.overflow_control_strength/100.0f); |
550 |
|
} else { |
551 |
|
/* no overflow applied in IFrames because: |
552 |
|
* - their role is important as they're references for P/BFrames. |
553 |
|
* - there aren't much in typical sequences, so if an IFrame overflows too |
554 |
|
* much, this overflow may impact the next IFrame too much and generate |
555 |
|
* a sequence of poor quality frames */ |
556 |
|
overflow = 0; |
557 |
} |
} |
558 |
|
|
559 |
|
/* Make sure we are not trying to compensate more overflow than we even have */ |
560 |
|
if (fabs(overflow) > fabs(rc->overflow)) |
561 |
|
overflow = rc->overflow; |
562 |
|
|
563 |
|
/* Make sure the overflow doesn't make the frame size to get out of the range |
564 |
|
* [-max_degradation..+max_improvment] */ |
565 |
|
if (overflow > dbytes*rc->param.max_overflow_improvement / 100) { |
566 |
|
if(overflow <= dbytes) |
567 |
|
dbytes += dbytes * rc->param.max_overflow_improvement / 100; |
568 |
|
else |
569 |
|
dbytes += overflow * rc->param.max_overflow_improvement / 100; |
570 |
|
} else if (overflow < - dbytes * rc->param.max_overflow_degradation / 100) { |
571 |
|
dbytes -= dbytes * rc->param.max_overflow_degradation / 100; |
572 |
|
} else { |
573 |
|
dbytes += overflow; |
574 |
} |
} |
|
rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0; |
|
575 |
|
|
576 |
DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames); fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant); |
/*------------------------------------------------------------------------- |
577 |
|
* Frame bit allocation last part: |
578 |
|
* |
579 |
|
* Cap frame length so we don't reach neither bigger frame sizes than first |
580 |
|
* pass nor smaller than the allowed minimum. |
581 |
|
*-----------------------------------------------------------------------*/ |
582 |
|
|
583 |
|
if (dbytes > s->length) { |
584 |
|
dbytes = s->length; |
585 |
|
} else if (dbytes < rc->min_length[s->type-1]) { |
586 |
|
dbytes = rc->min_length[s->type-1]; |
587 |
|
} else if (dbytes > rc->max_length) { |
588 |
|
/* ToDo: this condition is always wrong as max_length == maximum frame |
589 |
|
* length of first pass, so the first condition already caps the frame |
590 |
|
* size... */ |
591 |
|
capped_to_max_framesize = 1; |
592 |
|
dbytes = rc->max_length; |
593 |
|
DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- frame:%d Capped to maximum frame size\n", |
594 |
|
data->frame_num); |
595 |
} |
} |
596 |
|
|
597 |
|
/*------------------------------------------------------------------------ |
598 |
|
* Desired frame length <-> quantizer mapping |
599 |
|
*-----------------------------------------------------------------------*/ |
600 |
|
|
601 |
/* scale the curve */ |
/* For bframes we must retrieve the original quant used (sent to xvidcore) |
602 |
|
* as core applies the bquant formula before writing the stat log entry */ |
603 |
|
if(s->type == XVID_TYPE_BVOP) { |
604 |
|
|
605 |
static void internal_scale(rc_2pass2_t *rc) |
twopass_stat_t *b_ref = s; |
|
{ |
|
|
int64_t target = rc->target - rc->tot_quant; |
|
|
int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant; |
|
|
int min_size[3]; |
|
|
double scaler; |
|
|
int i; |
|
606 |
|
|
607 |
|
/* Find the reference frame */ |
608 |
|
while(b_ref != &rc->stats[0] && b_ref->type == XVID_TYPE_BVOP) |
609 |
|
b_ref--; |
610 |
|
|
611 |
/* perform an initial scale pass. |
/* Compute the original quant */ |
612 |
if a frame size is scaled underneath our hardcoded minimums, then we force the |
s->quant = 2*(100*s->quant - data->bquant_offset); |
613 |
frame size to the minimum, and deduct the original & scaled frmae length from the |
s->quant += data->bquant_ratio - 1; /* to avoid rouding issues */ |
614 |
original and target total lengths */ |
s->quant = s->quant/data->bquant_ratio - b_ref->quant; |
615 |
|
} |
|
min_size[0] = ((rc->stats[0].blks[0]*22) + 240) / 8; |
|
|
min_size[1] = (rc->stats[0].blks[0] + 88) / 8; |
|
|
min_size[2] = 8; |
|
616 |
|
|
617 |
scaler = (double)target / (double)pass1_length; |
/* Don't laugh at this very 'simple' quant<->filesize relationship, it |
618 |
|
* proves to be acurate enough for our algorithm */ |
619 |
|
scaled_quant = (double)s->quant*(double)s->length/(double)dbytes; |
620 |
|
|
621 |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
#ifdef COMPENSATE_FORMULA |
622 |
DPRINTF(XVID_DEBUG_RC, "undersize warning\n"); |
/* We know xvidcore will apply the bframe formula again, so we compensate |
623 |
scaler = 1.0; |
* it right now to make sure we would not apply it twice */ |
624 |
} |
if(s->type == XVID_TYPE_BVOP) { |
625 |
|
|
626 |
DPRINTF(XVID_DEBUG_RC, "target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)pass1_length, scaler); |
twopass_stat_t *b_ref = s; |
627 |
|
|
628 |
for (i=0; i<rc->num_frames; i++) { |
/* Find the reference frame */ |
629 |
stat_t * s = &rc->stats[i]; |
while(b_ref != &rc->stats[0] && b_ref->type == XVID_TYPE_BVOP) |
630 |
int len; |
b_ref--; |
631 |
|
|
632 |
|
/* Compute the quant it would be if the core did not apply the bframe |
633 |
|
* formula */ |
634 |
|
scaled_quant = 100*scaled_quant - data->bquant_offset; |
635 |
|
scaled_quant += data->bquant_ratio - 1; /* to avoid rouding issues */ |
636 |
|
scaled_quant /= data->bquant_ratio; |
637 |
|
} |
638 |
|
#endif |
639 |
|
|
640 |
if (s->zone_mode == XVID_ZONE_QUANT) { |
/* Quantizer has been scaled using floating point operations/results, we |
641 |
s->scaled_length = s->length; |
* must cast it to integer */ |
642 |
}else { |
data->quant = (int)scaled_quant; |
643 |
len = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
|
644 |
if (len < min_size[s->type-1]) { /* force frame size */ |
/* Let's clip the computed quantizer, if needed */ |
645 |
s->scaled_length = min_size[s->type-1]; |
if (data->quant < 1) { |
646 |
target -= s->scaled_length; |
data->quant = 1; |
647 |
pass1_length -= s->length; |
} else if (data->quant > 31) { |
648 |
|
data->quant = 31; |
649 |
}else{ |
}else{ |
650 |
s->scaled_length = 0; |
|
651 |
} |
/* The frame quantizer has not been clipped, this appears to be a good |
652 |
|
* computed quantizer, do not loose quantizer decimal part that we |
653 |
|
* accumulate for later reuse when its sum represents a complete |
654 |
|
* unit. */ |
655 |
|
rc->quant_error[s->type-1][data->quant] += scaled_quant - (double)data->quant; |
656 |
|
|
657 |
|
if (rc->quant_error[s->type-1][data->quant] >= 1.0) { |
658 |
|
rc->quant_error[s->type-1][data->quant] -= 1.0; |
659 |
|
data->quant++; |
660 |
|
} else if (rc->quant_error[s->type-1][data->quant] <= -1.0) { |
661 |
|
rc->quant_error[s->type-1][data->quant] += 1.0; |
662 |
|
data->quant--; |
663 |
} |
} |
664 |
} |
} |
665 |
|
|
666 |
scaler = (double)target / (double)pass1_length; |
/* Now we have a computed quant that is in the right quante range, with a |
667 |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
* possible +1 correction due to cumulated error. We can now safely clip |
668 |
DPRINTF(XVID_DEBUG_RC,"undersize warning\n"); |
* the quantizer again with user's quant ranges. "Safely" means the Rate |
669 |
scaler = 1.0; |
* Control could learn more about this quantizer, this knowledge is useful |
670 |
|
* for future frames even if it this quantizer won't be really used atm, |
671 |
|
* that's why we don't perform this clipping earlier. */ |
672 |
|
if (data->quant < data->min_quant[s->type-1]) { |
673 |
|
data->quant = data->min_quant[s->type-1]; |
674 |
|
} else if (data->quant > data->max_quant[s->type-1]) { |
675 |
|
data->quant = data->max_quant[s->type-1]; |
676 |
} |
} |
677 |
|
|
678 |
DPRINTF(XVID_DEBUG_RC, "target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)pass1_length, scaler); |
/* To avoid big quality jumps from frame to frame, we apply a "security" |
679 |
|
* rule that makes |last_quant - new_quant| <= 2. This rule only applies |
680 |
for (i=0; i<rc->num_frames; i++) { |
* to predicted frames (P and B) */ |
681 |
stat_t * s = &rc->stats[i]; |
if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) { |
682 |
|
|
683 |
if (s->scaled_length==0) { /* ignore frame with forced frame sizes */ |
if (data->quant > rc->last_quant[s->type-1] + 2) { |
684 |
s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
data->quant = rc->last_quant[s->type-1] + 2; |
685 |
|
DPRINTF(XVID_DEBUG_RC, |
686 |
|
"[xvid rc] -- frame %d p/b-frame quantizer prevented from rising too steeply\n", |
687 |
|
data->frame_num); |
688 |
} |
} |
689 |
|
if (data->quant < rc->last_quant[s->type-1] - 2) { |
690 |
|
data->quant = rc->last_quant[s->type-1] - 2; |
691 |
|
DPRINTF(XVID_DEBUG_RC, |
692 |
|
"[xvid rc] -- frame:%d p/b-frame quantizer prevented from falling too steeply\n", |
693 |
|
data->frame_num); |
694 |
} |
} |
695 |
} |
} |
696 |
|
|
697 |
|
/* We don't want to pollute the RC histerisis when our computed quant has |
698 |
|
* been computed from a capped frame size */ |
699 |
|
if (capped_to_max_framesize == 0) |
700 |
|
rc->last_quant[s->type-1] = data->quant; |
701 |
|
|
702 |
|
/* Don't forget to force 1st pass frame type ;-) */ |
703 |
|
data->type = s->type; |
704 |
|
|
705 |
|
/* Store the quantizer into the statistics -- Used to compensate the double |
706 |
|
* formula symptom */ |
707 |
|
s->quant2 = data->quant; |
708 |
|
|
709 |
void pre_process1(rc_2pass2_t * rc) |
return 0; |
|
{ |
|
|
int i; |
|
|
double total1, total2; |
|
|
uint64_t ivop_boost_total; |
|
|
|
|
|
ivop_boost_total = 0; |
|
|
rc->curve_comp_error = 0; |
|
|
|
|
|
for (i=0; i<3; i++) { |
|
|
rc->tot_scaled_length[i] = 0; |
|
710 |
} |
} |
711 |
|
|
712 |
for (i=0; i<rc->num_frames; i++) { |
/*---------------------------------------------------------------------------- |
713 |
stat_t * s = &rc->stats[i]; |
*--------------------------------------------------------------------------*/ |
714 |
|
|
715 |
rc->tot_scaled_length[s->type-1] += s->scaled_length; |
static int |
716 |
|
rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data) |
717 |
|
{ |
718 |
|
const char frame_type[4] = { 'i', 'p', 'b', 's'}; |
719 |
|
twopass_stat_t * s = &rc->stats[data->frame_num]; |
720 |
|
|
721 |
if (s->type == XVID_TYPE_IVOP) { |
/* Insufficent stats data */ |
722 |
ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100; |
if (data->frame_num >= rc->num_frames) |
723 |
} |
return 0; |
724 |
|
|
725 |
|
/* Update the quantizer counter */ |
726 |
|
rc->quant_count[s->type-1][data->quant]++; |
727 |
|
|
728 |
|
/* Update the frame type overflow */ |
729 |
|
if (data->type == XVID_TYPE_IVOP) { |
730 |
|
int kfdiff = 0; |
731 |
|
|
732 |
|
if(rc->KF_idx != rc->num_frames -1) { |
733 |
|
kfdiff = rc->keyframe_locations[rc->KF_idx+1]; |
734 |
|
kfdiff -= rc->keyframe_locations[rc->KF_idx]; |
735 |
} |
} |
736 |
|
|
737 |
rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) / |
/* Flush Keyframe overflow accumulator */ |
738 |
(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1])); |
rc->overflow += rc->KFoverflow; |
739 |
|
|
740 |
for(i=0; i<3; i++) { |
/* Store the frame overflow to the keyframe accumulator */ |
741 |
if (rc->count[i] == 0 || rc->movie_curve == 0) { |
rc->KFoverflow = s->desired_length - data->length; |
742 |
rc->avg_length[i] = 1; |
|
743 |
|
if (kfdiff > 1) { |
744 |
|
/* Non-consecutive keyframes case: |
745 |
|
* We can then divide this total keyframe overflow into equal parts |
746 |
|
* that we will distribute into regular overflow at each frame |
747 |
|
* between the sequence bounded by two IFrames */ |
748 |
|
rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1); |
749 |
}else{ |
}else{ |
750 |
rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve; |
/* Consecutive keyframes case: |
751 |
} |
* Flush immediatly the keyframe overflow and reset keyframe |
752 |
|
* overflow */ |
753 |
|
rc->overflow += rc->KFoverflow; |
754 |
|
rc->KFoverflow = 0; |
755 |
|
rc->KFoverflow_partial = 0; |
756 |
} |
} |
757 |
|
rc->KF_idx++; |
758 |
|
} else { |
759 |
|
/* Accumulate the frame overflow */ |
760 |
|
rc->overflow += s->desired_length - data->length; |
761 |
|
|
762 |
/* alt curve stuff here */ |
/* Distribute part of the keyframe overflow */ |
763 |
|
rc->overflow += rc->KFoverflow_partial; |
764 |
|
|
765 |
if (rc->param.use_alt_curve) { |
/* Don't forget to substract that same amount from the total keyframe |
766 |
const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1]; |
* overflow */ |
767 |
const uint64_t tot_pvop = rc->tot_length[XVID_TYPE_PVOP-1]; |
rc->KFoverflow -= rc->KFoverflow_partial; |
768 |
const uint64_t tot_bvop = rc->tot_length[XVID_TYPE_BVOP-1]; |
} |
|
const uint64_t tot_scaled_pvop = rc->tot_scaled_length[XVID_TYPE_PVOP-1]; |
|
|
const uint64_t tot_scaled_bvop = rc->tot_scaled_length[XVID_TYPE_BVOP-1]; |
|
769 |
|
|
770 |
rc->alt_curve_low = avg_pvop - avg_pvop * (double)rc->param.alt_curve_low_dist / 100.0; |
rc->overflow += s->error = s->desired_length - data->length; |
771 |
rc->alt_curve_low_diff = avg_pvop - rc->alt_curve_low; |
rc->real_total += data->length; |
|
rc->alt_curve_high = avg_pvop + avg_pvop * (double)rc->param.alt_curve_high_dist / 100.0; |
|
|
rc->alt_curve_high_diff = rc->alt_curve_high - avg_pvop; |
|
772 |
|
|
773 |
if (rc->param.alt_curve_use_auto) { |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- frame:%d type:%c quant:%d stats:%d scaled:%d desired:%d actual:%d error:%d overflow:%.2f\n", |
774 |
if (tot_bvop + tot_pvop > tot_scaled_bvop + tot_scaled_pvop) { |
data->frame_num, |
775 |
rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 / |
frame_type[data->type-1], |
776 |
((double)(tot_pvop + tot_bvop) / (double)(tot_scaled_pvop + tot_scaled_bvop))) * (double)rc->param.alt_curve_auto_str / 100.0); |
data->quant, |
777 |
|
s->length, |
778 |
|
s->scaled_length, |
779 |
|
s->desired_length, |
780 |
|
s->desired_length - s->error, |
781 |
|
-s->error, |
782 |
|
rc->overflow); |
783 |
|
|
784 |
if (rc->param.alt_curve_min_rel_qual < 20) |
return(0); |
|
rc->param.alt_curve_min_rel_qual = 20; |
|
|
}else{ |
|
|
rc->param.alt_curve_min_rel_qual = 100; |
|
|
} |
|
785 |
} |
} |
|
rc->alt_curve_mid_qual = (1.0 + (double)rc->param.alt_curve_min_rel_qual / 100.0) / 2.0; |
|
|
rc->alt_curve_qual_dev = 1.0 - rc->alt_curve_mid_qual; |
|
786 |
|
|
787 |
if (rc->param.alt_curve_low_dist > 100) { |
/***************************************************************************** |
788 |
switch(rc->param.alt_curve_type) { |
* Helper functions definition |
789 |
case XVID_CURVE_SINE: // Sine Curve (high aggressiveness) |
****************************************************************************/ |
|
rc->alt_curve_qual_dev *= 2.0 / (1.0 + sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))); |
|
|
rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)); |
|
|
break; |
|
|
case XVID_CURVE_LINEAR: // Linear (medium aggressiveness) |
|
|
rc->alt_curve_qual_dev *= 2.0 / (1.0 + avg_pvop / rc->alt_curve_low_diff); |
|
|
rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * avg_pvop / rc->alt_curve_low_diff; |
|
|
break; |
|
|
case XVID_CURVE_COSINE: // Cosine Curve (low aggressiveness) |
|
|
rc->alt_curve_qual_dev *= 2.0 / (1.0 + (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)))); |
|
|
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))); |
|
|
} |
|
|
} |
|
|
} |
|
|
/* --- */ |
|
790 |
|
|
791 |
|
/* Default buffer size for reading lines */ |
792 |
|
#define BUF_SZ 1024 |
793 |
|
|
794 |
total1=total2=0; |
/* Helper functions for reading/parsing the stats file */ |
795 |
for (i=0; i<rc->num_frames; i++) { |
static char *skipspaces(char *string); |
796 |
stat_t * s = &rc->stats[i]; |
static int iscomment(char *string); |
797 |
|
static char *readline(FILE *f); |
798 |
|
|
799 |
|
/* This function counts the number of frame entries in the stats file |
800 |
|
* It also counts the number of I Frames */ |
801 |
|
static int |
802 |
|
statsfile_count_frames(rc_2pass2_t * rc, char * filename) |
803 |
|
{ |
804 |
|
FILE * f; |
805 |
|
char *line; |
806 |
|
int lines; |
807 |
|
|
808 |
if (s->type != XVID_TYPE_IVOP) { |
rc->num_frames = 0; |
809 |
double dbytes,dbytes2; |
rc->num_keyframes = 0; |
810 |
|
|
811 |
dbytes = s->scaled_length / rc->movie_curve; |
if ((f = fopen(filename, "rb")) == NULL) |
812 |
dbytes2 = 0; /* XXX: warning */ |
return(-1); |
|
total1 += dbytes; |
|
|
if (s->type == XVID_TYPE_BVOP) |
|
|
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
|
813 |
|
|
814 |
if (rc->param.use_alt_curve) { |
lines = 0; |
815 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
while ((line = readline(f)) != NULL) { |
816 |
|
|
817 |
if (dbytes >= rc->alt_curve_high) { |
char *ptr; |
818 |
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
char type; |
819 |
}else{ |
int fields; |
|
switch(rc->param.alt_curve_type) { |
|
|
case XVID_CURVE_SINE : |
|
|
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))); |
|
|
break; |
|
|
case XVID_CURVE_LINEAR : |
|
|
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); |
|
|
break; |
|
|
case XVID_CURVE_COSINE : |
|
|
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)))); |
|
|
} |
|
|
} |
|
|
}else{ |
|
|
if (dbytes <= rc->alt_curve_low) { |
|
|
dbytes2 = dbytes; |
|
|
}else{ |
|
|
switch(rc->param.alt_curve_type) { |
|
|
case XVID_CURVE_SINE : |
|
|
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))); |
|
|
break; |
|
|
case XVID_CURVE_LINEAR : |
|
|
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); |
|
|
break; |
|
|
case XVID_CURVE_COSINE : |
|
|
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)))); |
|
|
} |
|
|
} |
|
820 |
|
|
821 |
} |
lines++; |
822 |
|
|
823 |
|
/* We skip spaces */ |
824 |
|
ptr = skipspaces(line); |
825 |
|
|
826 |
}else{ |
/* Skip coment lines or empty lines */ |
827 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
if(iscomment(ptr) || *ptr == '\0') { |
828 |
dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
free(line); |
829 |
}else{ |
continue; |
|
dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
|
|
} |
|
830 |
} |
} |
831 |
|
|
832 |
if (s->type == XVID_TYPE_BVOP) { |
/* Read the stat line from buffer */ |
833 |
dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
fields = sscanf(ptr, "%c", &type); |
834 |
if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1]) |
|
835 |
dbytes2 = rc->min_length[XVID_TYPE_BVOP-1]; |
/* Valid stats files have at least 6 fields */ |
836 |
}else{ |
if (fields == 1) { |
837 |
if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1]) |
switch(type) { |
838 |
dbytes2 = rc->min_length[XVID_TYPE_PVOP-1]; |
case 'i': |
839 |
|
case 'I': |
840 |
|
rc->num_keyframes++; |
841 |
|
case 'p': |
842 |
|
case 'P': |
843 |
|
case 'b': |
844 |
|
case 'B': |
845 |
|
case 's': |
846 |
|
case 'S': |
847 |
|
rc->num_frames++; |
848 |
|
break; |
849 |
|
default: |
850 |
|
DPRINTF(XVID_DEBUG_RC, |
851 |
|
"[xvid rc] -- WARNING: L%d unknown frame type used (%c).\n", |
852 |
|
lines, type); |
853 |
} |
} |
854 |
total2 += dbytes2; |
} else { |
855 |
|
DPRINTF(XVID_DEBUG_RC, |
856 |
|
"[xvid rc] -- WARNING: L%d misses some stat fields (%d).\n", |
857 |
|
lines, 6-fields); |
858 |
} |
} |
859 |
|
|
860 |
|
/* Free the line buffer */ |
861 |
|
free(line); |
862 |
} |
} |
863 |
|
|
864 |
rc->curve_comp_scale = total1 / total2; |
/* We are done with the file */ |
865 |
|
fclose(f); |
866 |
|
|
867 |
if (!rc->param.use_alt_curve) { |
return(0); |
|
DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n", |
|
|
(int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale)); |
|
868 |
} |
} |
869 |
|
|
870 |
if (rc->param.use_alt_curve) { |
/* open stats file(s) and read into rc->stats array */ |
871 |
int bonus_bias = rc->param.alt_curve_bonus_bias; |
static int |
872 |
int oldquant = 1; |
statsfile_load(rc_2pass2_t *rc, char * filename) |
873 |
|
{ |
874 |
|
FILE * f; |
875 |
|
int processed_entries; |
876 |
|
|
877 |
if (rc->param.alt_curve_use_auto_bonus_bias) |
/* Opens the file */ |
878 |
bonus_bias = rc->param.alt_curve_min_rel_qual; |
if ((f = fopen(filename, "rb"))==NULL) |
879 |
|
return(-1); |
880 |
|
|
881 |
rc->alt_curve_curve_bias_bonus = (total1 - total2) * (double)bonus_bias / 100.0 / (double)(rc->num_frames /* - credits_frames */ - rc->num_keyframes); |
processed_entries = 0; |
882 |
rc->curve_comp_scale = ((total1 - total2) * (1.0 - (double)bonus_bias / 100.0) + total2) / total2; |
while(processed_entries < rc->num_frames) { |
883 |
|
char type; |
884 |
|
int fields; |
885 |
|
twopass_stat_t * s = &rc->stats[processed_entries]; |
886 |
|
char *line, *ptr; |
887 |
|
|
888 |
|
/* Read the line from the file */ |
889 |
|
if((line = readline(f)) == NULL) |
890 |
|
break; |
891 |
|
|
892 |
/* special info for alt curve: bias bonus and quantizer thresholds */ |
/* We skip spaces */ |
893 |
|
ptr = skipspaces(line); |
894 |
|
|
895 |
DPRINTF(XVID_DEBUG_RC, "avg scaled framesize:%i", (int)rc->avg_length[XVID_TYPE_PVOP-1]); |
/* Skip comment lines or empty lines */ |
896 |
DPRINTF(XVID_DEBUG_RC, "bias bonus:%i bytes", (int)rc->alt_curve_curve_bias_bonus); |
if(iscomment(ptr) || *ptr == '\0') { |
897 |
|
free(line); |
898 |
|
continue; |
899 |
|
} |
900 |
|
|
901 |
for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) { |
/* Reset this field that is optional */ |
902 |
double curve_temp, dbytes; |
s->scaled_length = 0; |
|
int newquant; |
|
903 |
|
|
904 |
dbytes = i; |
/* Convert the fields */ |
905 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
fields = sscanf(ptr, |
906 |
if (dbytes >= rc->alt_curve_high) { |
"%c %d %d %d %d %d %d\n", |
907 |
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
&type, |
908 |
}else{ |
&s->quant, |
909 |
switch(rc->param.alt_curve_type) |
&s->blks[0], &s->blks[1], &s->blks[2], |
910 |
{ |
&s->length, |
911 |
case XVID_CURVE_SINE : |
&s->scaled_length); |
912 |
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))); |
|
913 |
break; |
/* Free line buffer, we don't need it anymore */ |
914 |
case XVID_CURVE_LINEAR : |
free(line); |
915 |
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); |
|
916 |
|
/* Fail silently, this has probably been warned in |
917 |
|
* statsfile_count_frames */ |
918 |
|
if(fields != 6 && fields != 7) |
919 |
|
continue; |
920 |
|
|
921 |
|
/* Convert frame type */ |
922 |
|
switch(type) { |
923 |
|
case 'i': |
924 |
|
case 'I': |
925 |
|
s->type = XVID_TYPE_IVOP; |
926 |
break; |
break; |
927 |
case XVID_CURVE_COSINE : |
case 'p': |
928 |
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)))); |
case 'P': |
929 |
} |
case 's': |
930 |
} |
case 'S': |
931 |
}else{ |
s->type = XVID_TYPE_PVOP; |
|
if (dbytes <= rc->alt_curve_low) { |
|
|
curve_temp = dbytes; |
|
|
}else{ |
|
|
switch(rc->param.alt_curve_type) |
|
|
{ |
|
|
case XVID_CURVE_SINE : |
|
|
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))); |
|
932 |
break; |
break; |
933 |
case XVID_CURVE_LINEAR : |
case 'b': |
934 |
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); |
case 'B': |
935 |
|
s->type = XVID_TYPE_BVOP; |
936 |
break; |
break; |
937 |
case XVID_CURVE_COSINE : |
default: |
938 |
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)))); |
/* Same as before, fail silently */ |
939 |
} |
continue; |
940 |
} |
} |
|
} |
|
|
|
|
|
if (rc->movie_curve > 1.0) |
|
|
dbytes *= rc->movie_curve; |
|
941 |
|
|
942 |
newquant = (int)(dbytes * 2.0 / (curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus)); |
/* Ok it seems it's been processed correctly */ |
943 |
if (newquant > 1) { |
processed_entries++; |
|
if (newquant != oldquant) { |
|
|
int percent = (int)((i - rc->avg_length[XVID_TYPE_PVOP-1]) * 100.0 / rc->avg_length[XVID_TYPE_PVOP-1]); |
|
|
oldquant = newquant; |
|
|
DPRINTF(XVID_DEBUG_RC, "quant:%i threshold at %i : %i percent", newquant, i, percent); |
|
|
} |
|
|
} |
|
944 |
} |
} |
945 |
|
|
946 |
} |
/* Close the file */ |
947 |
|
fclose(f); |
948 |
|
|
949 |
rc->overflow = 0; |
return(0); |
|
rc->KFoverflow = 0; |
|
|
rc->KFoverflow_partial = 0; |
|
|
rc->KF_idx = 1; |
|
950 |
} |
} |
951 |
|
|
952 |
|
/* pre-process the statistics data |
953 |
|
* - for each type, count, tot_length, min_length, max_length |
954 |
|
* - set keyframes_locations */ |
955 |
static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle) |
static void |
956 |
|
first_pass_stats_prepare_data(rc_2pass2_t * rc) |
957 |
{ |
{ |
958 |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
int i,j; |
|
rc_2pass2_t * rc; |
|
|
int i; |
|
959 |
|
|
960 |
rc = malloc(sizeof(rc_2pass2_t)); |
/* *rc fields initialization |
961 |
if (rc == NULL) |
* NB: INT_MAX and INT_MIN are used in order to be immediately replaced |
962 |
return XVID_ERR_MEMORY; |
* with real values of the 1pass */ |
963 |
|
for (i=0; i<3; i++) { |
964 |
|
rc->count[i]=0; |
965 |
|
rc->tot_length[i] = 0; |
966 |
|
rc->min_length[i] = INT_MAX; |
967 |
|
} |
968 |
|
|
969 |
rc->param = *param; |
rc->max_length = INT_MIN; |
970 |
|
|
971 |
if (rc->param.keyframe_boost <= 0) rc->param.keyframe_boost = 0; |
/* Loop through all frames and find/compute all the stuff this function |
972 |
if (rc->param.payback_method <= 0) rc->param.payback_method = XVID_PAYBACK_PROP; |
* is supposed to do */ |
973 |
if (rc->param.bitrate_payback_delay <= 0) rc->param.bitrate_payback_delay = 250; |
for (i=j=0; i<rc->num_frames; i++) { |
974 |
if (rc->param.curve_compression_high <= 0) rc->param.curve_compression_high = 0; |
twopass_stat_t * s = &rc->stats[i]; |
|
if (rc->param.curve_compression_low <= 0) rc->param.curve_compression_low = 0; |
|
|
if (rc->param.max_overflow_improvement <= 0) rc->param.max_overflow_improvement = 60; |
|
|
if (rc->param.max_overflow_degradation <= 0) rc->param.max_overflow_degradation = 60; |
|
|
|
|
|
if (rc->param.use_alt_curve <= 0) rc->param.use_alt_curve = 0; |
|
|
if (rc->param.alt_curve_high_dist <= 0) rc->param.alt_curve_high_dist = 500; |
|
|
if (rc->param.alt_curve_low_dist <= 0) rc->param.alt_curve_low_dist = 90; |
|
|
if (rc->param.alt_curve_use_auto <= 0) rc->param.alt_curve_use_auto = 1; |
|
|
if (rc->param.alt_curve_auto_str <= 0) rc->param.alt_curve_auto_str = 30; |
|
|
if (rc->param.alt_curve_type <= 0) rc->param.alt_curve_type = XVID_CURVE_LINEAR; |
|
|
if (rc->param.alt_curve_min_rel_qual <= 0) rc->param.alt_curve_min_rel_qual = 50; |
|
|
if (rc->param.alt_curve_use_auto_bonus_bias <= 0) rc->param.alt_curve_use_auto_bonus_bias = 1; |
|
|
if (rc->param.alt_curve_bonus_bias <= 0) rc->param.alt_curve_bonus_bias = 50; |
|
|
|
|
|
if (rc->param.kftreshold <= 0) rc->param.kftreshold = 10; |
|
|
if (rc->param.kfreduction <= 0) rc->param.kfreduction = 20; |
|
|
if (rc->param.min_key_interval <= 0) rc->param.min_key_interval = 300; |
|
975 |
|
|
976 |
if (!det_stats_length(rc, param->filename)){ |
rc->count[s->type-1]++; |
977 |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
rc->tot_length[s->type-1] += s->length; |
|
free(rc); |
|
|
return XVID_ERR_FAIL; |
|
|
} |
|
978 |
|
|
979 |
if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) { |
if (s->length < rc->min_length[s->type-1]) { |
980 |
free(rc); |
rc->min_length[s->type-1] = s->length; |
|
return XVID_ERR_MEMORY; |
|
981 |
} |
} |
982 |
|
|
983 |
/* |
if (s->length > rc->max_length) { |
984 |
* We need an extra location because we do as if the last frame were an |
rc->max_length = s->length; |
|
* IFrame. This is needed because our code consider that frames between |
|
|
* 2 IFrames form a natural sequence. So we store last frame as a |
|
|
* keyframe location. |
|
|
*/ |
|
|
if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) { |
|
|
free(rc->stats); |
|
|
free(rc); |
|
|
return XVID_ERR_MEMORY; |
|
985 |
} |
} |
986 |
|
|
987 |
if (!load_stats(rc, param->filename)) { |
if (s->type == XVID_TYPE_IVOP) { |
988 |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
rc->keyframe_locations[j] = i; |
989 |
free(rc->keyframe_locations); |
j++; |
990 |
free(rc->stats); |
} |
|
free(rc); |
|
|
return XVID_ERR_FAIL; |
|
991 |
} |
} |
992 |
|
|
993 |
/* pre-process our stats */ |
/* NB: |
994 |
|
* The "per sequence" overflow system considers a natural sequence to be |
995 |
|
* formed by all frames between two iframes, so if we want to make sure |
996 |
|
* the system does not go nuts during last sequence, we force the last |
997 |
|
* frame to appear in the keyframe locations array. */ |
998 |
|
rc->keyframe_locations[j] = i; |
999 |
|
|
1000 |
if (rc->num_frames < create->fbase/create->fincr) { |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Min 1st pass IFrame length: %d\n", rc->min_length[0]); |
1001 |
rc->target = rc->param.bitrate / 8; /* one second */ |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Min 1st pass PFrame length: %d\n", rc->min_length[1]); |
1002 |
}else{ |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Min 1st pass BFrame length: %d\n", rc->min_length[2]); |
|
rc->target = (rc->param.bitrate * rc->num_frames * create->fincr) / (create->fbase * 8); |
|
1003 |
} |
} |
1004 |
|
|
1005 |
DPRINTF(XVID_DEBUG_RC, "rc->target : %i\n", rc->target); |
/* calculate zone weight "center" */ |
1006 |
|
static void |
1007 |
#if 0 |
zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create) |
1008 |
rc->target -= rc->num_frames*24; /* avi file header */ |
{ |
1009 |
#endif |
int i,j; |
1010 |
|
int n = 0; |
1011 |
|
|
1012 |
|
rc->avg_weight = 0.0; |
1013 |
|
rc->tot_quant = 0; |
1014 |
|
|
|
pre_process0(rc); |
|
1015 |
|
|
1016 |
if (rc->param.bitrate) { |
if (create->num_zones == 0) { |
1017 |
zone_process(rc, create); |
for (j = 0; j < rc->num_frames; j++) { |
1018 |
internal_scale(rc); |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
1019 |
}else{ |
rc->stats[j].weight = 1.0; |
|
/* external scaler: ignore zone */ |
|
|
for (i=0;i<rc->num_frames;i++) { |
|
|
rc->stats[i].zone_mode = XVID_ZONE_WEIGHT; |
|
|
rc->stats[i].weight = 1.0; |
|
1020 |
} |
} |
1021 |
rc->avg_weight = 1.0; |
rc->avg_weight += rc->num_frames * 1.0; |
1022 |
rc->tot_quant = 0; |
n += rc->num_frames; |
1023 |
} |
} |
|
pre_process1(rc); |
|
1024 |
|
|
|
for (i=0; i<32;i++) { |
|
|
rc->pquant_error[i] = 0; |
|
|
rc->bquant_error[i] = 0; |
|
|
rc->quant_count[i] = 0; |
|
|
} |
|
1025 |
|
|
1026 |
rc->fq_error = 0; |
for(i=0; i < create->num_zones; i++) { |
1027 |
|
|
1028 |
*handle = rc; |
int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames; |
|
return(0); |
|
|
} |
|
1029 |
|
|
1030 |
|
if (i==0 && create->zones[i].frame > 0) { |
1031 |
|
for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) { |
1032 |
|
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
1033 |
|
rc->stats[j].weight = 1.0; |
1034 |
|
} |
1035 |
|
rc->avg_weight += create->zones[i].frame * 1.0; |
1036 |
|
n += create->zones[i].frame; |
1037 |
|
} |
1038 |
|
|
1039 |
static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy) |
if (create->zones[i].mode == XVID_ZONE_WEIGHT) { |
1040 |
{ |
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
1041 |
free(rc->keyframe_locations); |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
1042 |
free(rc->stats); |
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
|
free(rc); |
|
|
return(0); |
|
1043 |
} |
} |
1044 |
|
next -= create->zones[i].frame; |
1045 |
|
rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base; |
1046 |
|
n += next; |
1047 |
|
}else{ /* XVID_ZONE_QUANT */ |
1048 |
|
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
1049 |
|
rc->stats[j].zone_mode = XVID_ZONE_QUANT; |
1050 |
|
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
1051 |
|
rc->tot_quant += rc->stats[j].length; |
1052 |
|
} |
1053 |
|
} |
1054 |
|
} |
1055 |
|
rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0; |
1056 |
|
|
1057 |
|
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- center_weight:%f (for %d frames) fixed_bytes:%d\n", rc->avg_weight, n, rc->tot_quant); |
1058 |
|
} |
1059 |
|
|
1060 |
|
|
1061 |
static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data) |
/* scale the curve */ |
1062 |
|
static void |
1063 |
|
first_pass_scale_curve_internal(rc_2pass2_t *rc) |
1064 |
{ |
{ |
1065 |
stat_t * s = &rc->stats[data->frame_num]; |
int64_t target; |
1066 |
int overflow; |
int64_t pass1_length; |
1067 |
int desired; |
double scaler; |
1068 |
double dbytes; |
int i, num_MBs; |
|
double curve_temp; |
|
|
int capped_to_max_framesize = 0; |
|
1069 |
|
|
1070 |
/* |
/* We remove the bytes used by the fixed quantizer zones |
1071 |
* This function is quite long but easy to understand. In order to simplify |
* ToDo: this approach is flawed, the same amount of bytes is removed from |
1072 |
* the code path (a bit), we treat 3 cases that can return immediatly. |
* target and first pass data, this has no sense, zone_process should |
1073 |
*/ |
* give us two results one for unscaled data (1pass) and the other |
1074 |
|
* one for scaled data and we should then write: |
1075 |
|
* target = rc->target - rc->tot_quant_scaled; |
1076 |
|
* pass1_length = rc->i+p+b - rc->tot_quant_firstpass */ |
1077 |
|
target = rc->target - rc->tot_quant; |
1078 |
|
|
1079 |
|
/* Do the same for the first pass data */ |
1080 |
|
pass1_length = rc->tot_length[XVID_TYPE_IVOP-1]; |
1081 |
|
pass1_length += rc->tot_length[XVID_TYPE_PVOP-1]; |
1082 |
|
pass1_length += rc->tot_length[XVID_TYPE_BVOP-1]; |
1083 |
|
pass1_length -= rc->tot_quant; |
1084 |
|
|
1085 |
/* First case: Another plugin has already set a quantizer */ |
/* Let's compute a linear scaler in order to perform curve scaling */ |
1086 |
if (data->quant > 0) |
scaler = (double)target / (double)pass1_length; |
|
return(0); |
|
1087 |
|
|
1088 |
/* Second case: We are in a Quant zone */ |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
1089 |
if (s->zone_mode == XVID_ZONE_QUANT) { |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected before correction\n"); |
1090 |
|
scaler = 1.0; |
1091 |
|
} |
1092 |
|
|
1093 |
rc->fq_error += s->weight; |
/* Compute min frame lengths (for each frame type) according to the number |
1094 |
data->quant = (int)rc->fq_error; |
* of MBs. We sum all block type counters of frame 0, this gives us the |
1095 |
rc->fq_error -= data->quant; |
* number of MBs. |
1096 |
|
* |
1097 |
|
* We compare these hardcoded values with observed values in first pass |
1098 |
|
* (determined in pre_process0).Then we keep the real minimum. */ |
1099 |
|
|
1100 |
s->desired_length = s->length; |
/* Number of MBs */ |
1101 |
|
num_MBs = rc->stats[0].blks[0]; |
1102 |
|
num_MBs += rc->stats[0].blks[1]; |
1103 |
|
num_MBs += rc->stats[0].blks[2]; |
1104 |
|
|
1105 |
|
/* Minimum for I frames */ |
1106 |
|
if(rc->min_length[XVID_TYPE_IVOP-1] > ((num_MBs*22) + 240) / 8) |
1107 |
|
rc->min_length[XVID_TYPE_IVOP-1] = ((num_MBs*22) + 240) / 8; |
1108 |
|
|
1109 |
|
/* Minimum for P/S frames */ |
1110 |
|
if(rc->min_length[XVID_TYPE_PVOP-1] > ((num_MBs) + 88) / 8) |
1111 |
|
rc->min_length[XVID_TYPE_PVOP-1] = ((num_MBs) + 88) / 8; |
1112 |
|
|
1113 |
|
/* Minimum for B frames */ |
1114 |
|
if(rc->min_length[XVID_TYPE_BVOP-1] > 8) |
1115 |
|
rc->min_length[XVID_TYPE_BVOP-1] = 8; |
1116 |
|
|
1117 |
return(0); |
/* Perform an initial scale pass. |
1118 |
|
* |
1119 |
|
* If a frame size is scaled underneath our hardcoded minimums, then we |
1120 |
|
* force the frame size to the minimum, and deduct the original & scaled |
1121 |
|
* frame length from the original and target total lengths */ |
1122 |
|
for (i=0; i<rc->num_frames; i++) { |
1123 |
|
twopass_stat_t * s = &rc->stats[i]; |
1124 |
|
int len; |
1125 |
|
|
1126 |
|
/* No need to scale frame length for which a specific quantizer is |
1127 |
|
* specified thanks to zones */ |
1128 |
|
if (s->zone_mode == XVID_ZONE_QUANT) { |
1129 |
|
s->scaled_length = s->length; |
1130 |
|
continue; |
1131 |
} |
} |
1132 |
|
|
1133 |
/* Third case: insufficent stats data */ |
/* Compute the scaled length */ |
1134 |
if (data->frame_num >= rc->num_frames) |
len = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
|
return 0; |
|
|
|
|
|
/* |
|
|
* The last case is the one every normal minded developer should fear to |
|
|
* maintain in a project :-) |
|
|
*/ |
|
|
|
|
|
/* XXX: why by 8 */ |
|
|
overflow = rc->overflow / 8; |
|
1135 |
|
|
1136 |
/* |
/* Compare with the computed minimum */ |
1137 |
* The rc->overflow field represents the overflow in current scene (between two |
if (len < rc->min_length[s->type-1]) { |
1138 |
* IFrames) so we must not forget to reset it if we are enetring a new scene |
/* This is a 'forced size' frame, set its frame size to the |
1139 |
*/ |
* computed minimum */ |
1140 |
if (s->type == XVID_TYPE_IVOP) { |
s->scaled_length = rc->min_length[s->type-1]; |
1141 |
overflow = 0; |
|
1142 |
|
/* Remove both scaled and original size from their respective |
1143 |
|
* total counters, as we prepare a second pass for 'regular' |
1144 |
|
* frames */ |
1145 |
|
target -= s->scaled_length; |
1146 |
|
pass1_length -= s->length; |
1147 |
|
} else { |
1148 |
|
/* Do nothing for now, we'll scale this later */ |
1149 |
|
s->scaled_length = 0; |
1150 |
|
} |
1151 |
} |
} |
1152 |
|
|
1153 |
desired = s->scaled_length; |
/* The first pass on data substracted all 'forced size' frames from the |
1154 |
|
* total counters. Now, it's possible to scale the 'regular' frames. */ |
1155 |
|
|
1156 |
dbytes = desired; |
/* Scaling factor for 'regular' frames */ |
1157 |
if (s->type == XVID_TYPE_IVOP) { |
scaler = (double)target / (double)pass1_length; |
|
dbytes += desired * rc->param.keyframe_boost / 100; |
|
|
} |
|
|
dbytes /= rc->movie_curve; |
|
1158 |
|
|
1159 |
/* |
/* Detect undersizing */ |
1160 |
* We are now entering in the hard part of the algo, it was first designed |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
1161 |
* to work with i/pframes only streams, so the way it computes things is |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected after correction\n"); |
1162 |
* adapted to pframes only. However we can use it if we just take care to |
scaler = 1.0; |
|
* scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and |
|
|
* then before really using values depending on frame sizes, scaling the |
|
|
* value again with the inverse ratio |
|
|
*/ |
|
|
if (s->type == XVID_TYPE_BVOP) { |
|
|
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
|
1163 |
} |
} |
1164 |
|
|
1165 |
/* |
/* Do another pass with the new scaler */ |
1166 |
* Apply user's choosen Payback method. Payback helps bitrate to follow the |
for (i=0; i<rc->num_frames; i++) { |
1167 |
* scaled curve "paying back" past errors in curve previsions. |
twopass_stat_t * s = &rc->stats[i]; |
|
*/ |
|
|
if (rc->param.payback_method == XVID_PAYBACK_BIAS) { |
|
|
desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay); |
|
|
}else{ |
|
|
desired = (int)(rc->curve_comp_error * dbytes / |
|
|
rc->avg_length[XVID_TYPE_PVOP-1] / rc->param.bitrate_payback_delay); |
|
1168 |
|
|
1169 |
if (labs(desired) > fabs(rc->curve_comp_error)) { |
/* Ignore frame with forced frame sizes */ |
1170 |
desired = (int)rc->curve_comp_error; |
if (s->scaled_length == 0) |
1171 |
} |
s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
1172 |
} |
} |
1173 |
|
|
1174 |
rc->curve_comp_error -= desired; |
/* Job done */ |
1175 |
|
return; |
1176 |
|
} |
1177 |
|
|
1178 |
/* |
/* Apply all user settings to the scaled curve |
1179 |
* Alt curve treatment is not that hard to understand though the formulas |
* This implies: |
1180 |
* seem to be huge. Alt treatment is basically a way to soft/harden the |
* keyframe boosting |
1181 |
* curve flux applying sine/linear/cosine ratios |
* high/low compression */ |
1182 |
*/ |
static void |
1183 |
|
scaled_curve_apply_advanced_parameters(rc_2pass2_t * rc) |
1184 |
|
{ |
1185 |
|
int i; |
1186 |
|
int64_t ivop_boost_total; |
1187 |
|
|
1188 |
/* XXX: warning */ |
/* Reset the rate controller (per frame type) total byte counters */ |
1189 |
curve_temp = 0; |
for (i=0; i<3; i++) rc->tot_scaled_length[i] = 0; |
1190 |
|
|
1191 |
if (rc->param.use_alt_curve) { |
/* Compute total bytes for each frame type */ |
1192 |
if (s->type != XVID_TYPE_IVOP) { |
for (i=0; i<rc->num_frames;i++) { |
1193 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
twopass_stat_t *s = &rc->stats[i]; |
1194 |
if (dbytes >= rc->alt_curve_high) { |
rc->tot_scaled_length[s->type-1] += s->scaled_length; |
|
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
|
|
} else { |
|
|
switch(rc->param.alt_curve_type) { |
|
|
case XVID_CURVE_SINE : |
|
|
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))); |
|
|
break; |
|
|
case XVID_CURVE_LINEAR : |
|
|
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); |
|
|
break; |
|
|
case XVID_CURVE_COSINE : |
|
|
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)))); |
|
|
} |
|
|
} |
|
|
} else { |
|
|
if (dbytes <= rc->alt_curve_low){ |
|
|
curve_temp = dbytes; |
|
|
} else { |
|
|
switch(rc->param.alt_curve_type) { |
|
|
case XVID_CURVE_SINE : |
|
|
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))); |
|
|
break; |
|
|
case XVID_CURVE_LINEAR : |
|
|
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); |
|
|
break; |
|
|
case XVID_CURVE_COSINE : |
|
|
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)))); |
|
|
} |
|
|
} |
|
1195 |
} |
} |
1196 |
|
|
1197 |
/* |
/* First we compute the total amount of bits needed, as being described by |
1198 |
* End of code path for curve_temp, as told earlier, we are now |
* the scaled distribution. During this pass over the complete stats data, |
1199 |
* obliged to scale the value to a bframe one using the inverse |
* we see how much bits two user settings will get/give from/to p&b frames: |
1200 |
* ratio applied earlier |
* - keyframe boosting |
1201 |
*/ |
* - keyframe distance penalty */ |
1202 |
if (s->type == XVID_TYPE_BVOP) |
rc->KF_idx = 0; |
1203 |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
ivop_boost_total = 0; |
1204 |
|
for (i=0; i<rc->num_frames; i++) { |
1205 |
|
twopass_stat_t * s = &rc->stats[i]; |
1206 |
|
|
1207 |
curve_temp = curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus; |
/* Some more work is needed for I frames */ |
1208 |
|
if (s->type == XVID_TYPE_IVOP) { |
1209 |
|
int ivop_boost; |
1210 |
|
|
1211 |
desired += ((int)curve_temp); |
/* Accumulate bytes needed for keyframe boosting */ |
1212 |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
ivop_boost = s->scaled_length*rc->param.keyframe_boost/100; |
|
} else { |
|
|
/* |
|
|
* End of code path for dbytes, as told earlier, we are now |
|
|
* obliged to scale the value to a bframe one using the inverse |
|
|
* ratio applied earlier |
|
|
*/ |
|
|
if (s->type == XVID_TYPE_BVOP) |
|
|
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
|
1213 |
|
|
1214 |
desired += ((int)dbytes); |
#if 0 /* ToDo: decide how to apply kfthresholding */ |
1215 |
rc->curve_comp_error += dbytes - (int)dbytes; |
#endif |
1216 |
} |
/* If the frame size drops under the minimum length, then cap ivop_boost */ |
1217 |
|
if (ivop_boost + s->scaled_length < rc->min_length[XVID_TYPE_IVOP-1]) |
1218 |
|
ivop_boost = rc->min_length[XVID_TYPE_IVOP-1] - s->scaled_length; |
1219 |
|
|
1220 |
} else if ((rc->param.curve_compression_high + rc->param.curve_compression_low) && s->type != XVID_TYPE_IVOP) { |
/* Accumulate the ivop boost */ |
1221 |
|
ivop_boost_total += ivop_boost; |
1222 |
|
|
1223 |
curve_temp = rc->curve_comp_scale; |
/* Don't forget to update the keyframe index */ |
1224 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
rc->KF_idx++; |
1225 |
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
} |
|
} else { |
|
|
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
|
1226 |
} |
} |
1227 |
|
|
1228 |
/* |
/* Initialize the IBoost tax ratio for P/S/B frames |
1229 |
* End of code path for curve_temp, as told earlier, we are now |
* |
1230 |
* obliged to scale the value to a bframe one using the inverse |
* This ratio has to be applied to p/b/s frames in order to reserve |
1231 |
* ratio applied earlier |
* additional bits for keyframes (keyframe boosting) or if too much |
1232 |
*/ |
* keyframe distance is applied, bits retrieved from the keyframes. |
1233 |
if (s->type == XVID_TYPE_BVOP) |
* |
1234 |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
* ie pb_length *= rc->pb_iboost_tax_ratio; |
1235 |
|
* |
1236 |
|
* gives the ideal length of a p/b frame */ |
1237 |
|
|
1238 |
desired += (int)curve_temp; |
/* Compute the total length of p/b/s frames (temporary storage into |
1239 |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
* movie_curve) */ |
1240 |
} else { |
rc->pb_iboost_tax_ratio = (double)rc->tot_scaled_length[XVID_TYPE_PVOP-1]; |
1241 |
/* |
rc->pb_iboost_tax_ratio += (double)rc->tot_scaled_length[XVID_TYPE_BVOP-1]; |
1242 |
* End of code path for dbytes, as told earlier, we are now |
|
1243 |
* obliged to scale the value to a bframe one using the inverse |
/* Compute the ratio described above |
1244 |
* ratio applied earlier |
* taxed_total = sum(0, n, tax*scaled_length) |
1245 |
*/ |
* <=> taxed_total = tax.sum(0, n, scaled_length) |
1246 |
if (s->type == XVID_TYPE_BVOP){ |
* <=> tax = taxed_total / original_total */ |
1247 |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
rc->pb_iboost_tax_ratio = |
1248 |
} |
(rc->pb_iboost_tax_ratio - ivop_boost_total) / |
1249 |
|
rc->pb_iboost_tax_ratio; |
1250 |
|
|
1251 |
desired += (int)dbytes; |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- IFrame boost tax ratio:%.2f\n", |
1252 |
rc->curve_comp_error += dbytes - (int)dbytes; |
rc->pb_iboost_tax_ratio); |
|
} |
|
1253 |
|
|
1254 |
|
/* Compute the average size of frames per frame type */ |
1255 |
|
for(i=0; i<3; i++) { |
1256 |
|
/* Special case for missing type or weird case */ |
1257 |
|
if (rc->count[i] == 0 || rc->pb_iboost_tax_ratio == 0) { |
1258 |
|
rc->avg_length[i] = 1; |
1259 |
|
} else { |
1260 |
|
rc->avg_length[i] = rc->tot_scaled_length[i]; |
1261 |
|
|
1262 |
/* |
if (i == (XVID_TYPE_IVOP-1)) { |
1263 |
* We can't do bigger frames than first pass, this would be stupid as first |
/* I Frames total has to be added the boost total */ |
1264 |
* pass is quant=2 and that reaching quant=1 is not worth it. We would lose |
rc->avg_length[i] += ivop_boost_total; |
|
* many bytes and we would not not gain much quality. |
|
|
*/ |
|
|
if (desired > s->length) { |
|
|
rc->curve_comp_error += desired - s->length; |
|
|
desired = s->length; |
|
1265 |
}else{ |
}else{ |
1266 |
if (desired < rc->min_length[s->type-1]) { |
/* P/B frames has to taxed */ |
1267 |
if (s->type == XVID_TYPE_IVOP){ |
rc->avg_length[i] *= rc->pb_iboost_tax_ratio; |
|
rc->curve_comp_error -= rc->min_length[XVID_TYPE_IVOP-1] - desired; |
|
1268 |
} |
} |
1269 |
desired = rc->min_length[s->type-1]; |
|
1270 |
|
/* Finally compute the average frame size */ |
1271 |
|
rc->avg_length[i] /= (double)rc->count[i]; |
1272 |
} |
} |
1273 |
} |
} |
1274 |
|
|
1275 |
s->desired_length = desired; |
/* Assymetric curve compression */ |
1276 |
|
if (rc->param.curve_compression_high || rc->param.curve_compression_low) { |
1277 |
|
double symetric_total; |
1278 |
|
double assymetric_delta_total; |
1279 |
|
|
1280 |
|
/* Like I frame boosting, assymetric curve compression modifies the total |
1281 |
|
* amount of needed bits, we must compute the ratio so we can prescale |
1282 |
|
lengths */ |
1283 |
|
symetric_total = 0; |
1284 |
|
assymetric_delta_total = 0; |
1285 |
|
for (i=0; i<rc->num_frames; i++) { |
1286 |
|
double assymetric_delta; |
1287 |
|
double dbytes; |
1288 |
|
twopass_stat_t * s = &rc->stats[i]; |
1289 |
|
|
1290 |
/* if this keyframe is too close to the next, reduce it's byte allotment |
/* I Frames are not concerned by assymetric scaling */ |
1291 |
XXX: why do we do this after setting the desired length */ |
if (s->type == XVID_TYPE_IVOP) |
1292 |
|
continue; |
|
if (s->type == XVID_TYPE_IVOP) { |
|
|
int KFdistance = rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1]; |
|
|
|
|
|
if (KFdistance < rc->param.kftreshold) { |
|
|
|
|
|
KFdistance = KFdistance - rc->param.min_key_interval; |
|
|
|
|
|
if (KFdistance >= 0) { |
|
|
int KF_min_size; |
|
1293 |
|
|
1294 |
KF_min_size = desired * (100 - rc->param.kfreduction) / 100; |
/* During the real run, we would have to apply the iboost tax */ |
1295 |
if (KF_min_size < 1) |
dbytes = s->scaled_length * rc->pb_iboost_tax_ratio; |
|
KF_min_size = 1; |
|
1296 |
|
|
1297 |
desired = KF_min_size + (desired - KF_min_size) * KFdistance / |
/* Update the symmetric curve compression total */ |
1298 |
(rc->param.kftreshold - rc->param.min_key_interval); |
symetric_total += dbytes; |
1299 |
|
|
1300 |
if (desired < 1) |
/* Apply assymetric curve compression */ |
1301 |
desired = 1; |
if (dbytes > rc->avg_length[s->type-1]) |
1302 |
} |
assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * (double)rc->param.curve_compression_high / 100.0f; |
1303 |
} |
else |
1304 |
} |
assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * (double)rc->param.curve_compression_low / 100.0f; |
1305 |
|
|
1306 |
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
/* Cap to the minimum frame size if needed */ |
1307 |
|
if (dbytes + assymetric_delta < rc->min_length[s->type-1]) |
1308 |
|
assymetric_delta = rc->min_length[s->type-1] - dbytes; |
1309 |
|
|
1310 |
/* Reign in overflow with huge frames */ |
/* Accumulate after assymetric curve compression */ |
1311 |
if (labs(overflow) > labs(rc->overflow)) { |
assymetric_delta_total += assymetric_delta; |
|
overflow = rc->overflow; |
|
1312 |
} |
} |
1313 |
|
|
1314 |
/* Make sure overflow doesn't run away */ |
/* Compute the tax that all p/b frames have to pay in order to respect the |
1315 |
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
* bit distribution changes that the assymetric compression curve imposes |
1316 |
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
* We want assymetric_total = sum(0, n-1, tax.scaled_length) |
1317 |
overflow * rc->param.max_overflow_improvement / 100; |
* ie assymetric_total = ratio.sum(0, n-1, scaled_length) |
1318 |
} else if (overflow < desired * rc->param.max_overflow_degradation / -100){ |
* ratio = assymetric_total / symmetric_total */ |
1319 |
desired += desired * rc->param.max_overflow_degradation / -100; |
rc->assymetric_tax_ratio = ((double)symetric_total - (double)assymetric_delta_total) / (double)symetric_total; |
1320 |
} else { |
} else { |
1321 |
desired += overflow; |
rc->assymetric_tax_ratio = 1.0f; |
1322 |
} |
} |
1323 |
|
|
1324 |
/* Make sure we are not higher than desired frame size */ |
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Assymetric tax ratio:%.2f\n", rc->assymetric_tax_ratio); |
|
if (desired > rc->max_length) { |
|
|
capped_to_max_framesize = 1; |
|
|
desired = rc->max_length; |
|
|
} |
|
1325 |
|
|
1326 |
/* Make sure to not scale below the minimum framesize */ |
/* Last bits that need to be reset */ |
1327 |
if (desired < rc->min_length[s->type-1]) |
rc->overflow = 0; |
1328 |
desired = rc->min_length[s->type-1]; |
rc->KFoverflow = 0; |
1329 |
|
rc->KFoverflow_partial = 0; |
1330 |
|
rc->KF_idx = 0; |
1331 |
|
rc->desired_total = 0; |
1332 |
|
rc->real_total = 0; |
1333 |
|
|
1334 |
|
/* Job done */ |
1335 |
|
return; |
1336 |
|
} |
1337 |
|
|
1338 |
|
/***************************************************************************** |
1339 |
|
* Still more low level stuff (nothing to do with stats treatment) |
1340 |
|
****************************************************************************/ |
1341 |
|
|
1342 |
|
/* This function returns an allocated string containing a complete line read |
1343 |
|
* from the file starting at the current position */ |
1344 |
|
static char * |
1345 |
|
readline(FILE *f) |
1346 |
|
{ |
1347 |
|
char *buffer = NULL; |
1348 |
|
int buffer_size = 0; |
1349 |
|
int pos = 0; |
1350 |
|
|
1351 |
/* |
do { |
1352 |
* Don't laugh at this very 'simple' quant<->filesize relationship, it |
int c; |
|
* proves to be acurate enough for our algorithm |
|
|
*/ |
|
|
data->quant= (s->quant * s->length) / desired; |
|
1353 |
|
|
1354 |
/* Let's clip the computed quantizer, if needed */ |
/* Read a character from the stream */ |
1355 |
if (data->quant < 1) { |
c = fgetc(f); |
|
data->quant = 1; |
|
|
} else if (data->quant > 31) { |
|
|
data->quant = 31; |
|
|
} else if (s->type != XVID_TYPE_IVOP) { |
|
1356 |
|
|
1357 |
/* |
/* Is that EOF or new line ? */ |
1358 |
* The frame quantizer has not been clipped, this appear to be a good |
if(c == EOF || c == '\n') |
1359 |
* computed quantizer, however past frames give us some info about how |
break; |
|
* this quantizer performs against the algo prevision. Let's use this |
|
|
* prevision to increase the quantizer when we observe a too big |
|
|
* accumulated error |
|
|
*/ |
|
|
if (s->type== XVID_TYPE_BVOP) { |
|
|
rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
|
1360 |
|
|
1361 |
if (rc->bquant_error[data->quant] >= 1.0) { |
/* Do we have to update buffer ? */ |
1362 |
rc->bquant_error[data->quant] -= 1.0; |
if(pos >= buffer_size - 1) { |
1363 |
data->quant++; |
buffer_size += BUF_SZ; |
1364 |
|
buffer = (char*)realloc(buffer, buffer_size); |
1365 |
|
if (buffer == NULL) |
1366 |
|
return(NULL); |
1367 |
} |
} |
|
} else { |
|
|
rc->pquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
|
1368 |
|
|
1369 |
if (rc->pquant_error[data->quant] >= 1.0) { |
buffer[pos] = c; |
1370 |
rc->pquant_error[data->quant] -= 1.0; |
pos++; |
1371 |
++data->quant; |
} while(1); |
|
} |
|
|
} |
|
|
} |
|
1372 |
|
|
1373 |
/* |
/* Read \n or EOF */ |
1374 |
* Now we have a computed quant that is in the right quante range, with a |
if (buffer == NULL) { |
1375 |
* possible +1 correction due to cumulated error. We can now safely clip |
/* EOF, so we reached the end of the file, return NULL */ |
1376 |
* the quantizer again with user's quant ranges. "Safely" means the Rate |
if(feof(f)) |
1377 |
* Control could learn more about this quantizer, this knowledge is useful |
return(NULL); |
1378 |
* for future frames even if it this quantizer won't be really used atm, |
|
1379 |
* that's why we don't perform this clipping earlier. |
/* Just an empty line with just a newline, allocate a 1 byte buffer to |
1380 |
*/ |
* store a zero length string */ |
1381 |
if (data->quant < data->min_quant[s->type-1]) { |
buffer = (char*)malloc(1); |
1382 |
data->quant = data->min_quant[s->type-1]; |
if(buffer == NULL) |
1383 |
} else if (data->quant > data->max_quant[s->type-1]) { |
return(NULL); |
|
data->quant = data->max_quant[s->type-1]; |
|
1384 |
} |
} |
1385 |
|
|
1386 |
/* |
/* Zero terminated string */ |
1387 |
* To avoid big quality jumps from frame to frame, we apply a "security" |
buffer[pos] = '\0'; |
|
* rule that makes |last_quant - new_quant| <= 2. This rule only applies |
|
|
* to predicted frames (P and B) |
|
|
*/ |
|
|
if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) { |
|
1388 |
|
|
1389 |
if (data->quant > rc->last_quant[s->type-1] + 2) { |
return(buffer); |
|
data->quant = rc->last_quant[s->type-1] + 2; |
|
|
DPRINTF(XVID_DEBUG_RC, "p/b-frame quantizer prevented from rising too steeply"); |
|
1390 |
} |
} |
1391 |
if (data->quant < rc->last_quant[s->type-1] - 2) { |
|
1392 |
data->quant = rc->last_quant[s->type-1] - 2; |
/* This function returns a pointer to the first non space char in the given |
1393 |
DPRINTF(XVID_DEBUG_RC, "p/b-frame quantizer prevented from falling too steeply"); |
* string */ |
1394 |
|
static char * |
1395 |
|
skipspaces(char *string) |
1396 |
|
{ |
1397 |
|
const char spaces[] = |
1398 |
|
{ |
1399 |
|
' ','\t','\0' |
1400 |
|
}; |
1401 |
|
const char *spacechar = spaces; |
1402 |
|
|
1403 |
|
if (string == NULL) return(NULL); |
1404 |
|
|
1405 |
|
while (*string != '\0') { |
1406 |
|
/* Test against space chars */ |
1407 |
|
while (*spacechar != '\0') { |
1408 |
|
if (*string == *spacechar) { |
1409 |
|
string++; |
1410 |
|
spacechar = spaces; |
1411 |
|
break; |
1412 |
} |
} |
1413 |
|
spacechar++; |
1414 |
} |
} |
1415 |
|
|
1416 |
/* |
/* No space char */ |
1417 |
* We don't want to pollute the RC history results when our computed quant |
if (*spacechar == '\0') return(string); |
|
* has been computed from a capped frame size |
|
|
*/ |
|
|
if (capped_to_max_framesize == 0) { |
|
|
rc->last_quant[s->type-1] = data->quant; |
|
1418 |
} |
} |
1419 |
|
|
1420 |
return 0; |
return(string); |
1421 |
} |
} |
1422 |
|
|
1423 |
|
/* This function returns a boolean that tells if the string is only a |
1424 |
|
* comment */ |
1425 |
static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data) |
static int |
1426 |
|
iscomment(char *string) |
1427 |
{ |
{ |
1428 |
stat_t * s = &rc->stats[data->frame_num]; |
const char comments[] = |
1429 |
|
{ |
1430 |
/* Insufficent stats data */ |
'#',';', '%', '\0' |
1431 |
if (data->frame_num >= rc->num_frames) |
}; |
1432 |
return 0; |
const char *cmtchar = comments; |
1433 |
|
int iscomment = 0; |
1434 |
rc->quant_count[data->quant]++; |
|
1435 |
|
if (string == NULL) return(1); |
1436 |
if (data->type == XVID_TYPE_IVOP) { |
|
1437 |
int kfdiff = (rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1]); |
string = skipspaces(string); |
1438 |
|
|
1439 |
rc->overflow += rc->KFoverflow; |
while(*cmtchar != '\0') { |
1440 |
rc->KFoverflow = s->desired_length - data->length; |
if(*string == *cmtchar) { |
1441 |
|
iscomment = 1; |
1442 |
if (kfdiff > 1) { // non-consecutive keyframes |
break; |
|
rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1); |
|
|
}else{ // consecutive keyframes |
|
|
rc->overflow += rc->KFoverflow; |
|
|
rc->KFoverflow = 0; |
|
|
rc->KFoverflow_partial = 0; |
|
1443 |
} |
} |
1444 |
rc->KF_idx++; |
cmtchar++; |
|
}else{ |
|
|
// distribute part of the keyframe overflow |
|
|
rc->overflow += s->desired_length - data->length + rc->KFoverflow_partial; |
|
|
rc->KFoverflow -= rc->KFoverflow_partial; |
|
1445 |
} |
} |
1446 |
|
|
1447 |
DPRINTF(XVID_DEBUG_RC, "[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
return(iscomment); |
|
data->frame_num, |
|
|
data->quant, |
|
|
s->length, |
|
|
s->scaled_length, |
|
|
data->length, |
|
|
rc->overflow); |
|
|
|
|
|
return(0); |
|
1448 |
} |
} |
1449 |
|
|
1450 |
|
#if 0 |
1451 |
|
static void |
1452 |
int xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2) |
stats_print(rc_2pass2_t * rc) |
|
{ |
|
|
switch(opt) |
|
1453 |
{ |
{ |
1454 |
case XVID_PLG_INFO : |
int i; |
1455 |
return 0; |
const char frame_type[4] = { 'i', 'p', 'b', 's'}; |
|
|
|
|
case XVID_PLG_CREATE : |
|
|
return rc_2pass2_create((xvid_plg_create_t*)param1, param2); |
|
|
|
|
|
case XVID_PLG_DESTROY : |
|
|
return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1); |
|
|
|
|
|
case XVID_PLG_BEFORE : |
|
|
return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
|
1456 |
|
|
1457 |
case XVID_PLG_AFTER : |
for (i=0; i<rc->num_frames; i++) { |
1458 |
return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
twopass_stat_t *s = &rc->stats[i]; |
1459 |
|
DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- frame:%d type:%c quant:%d stats:%d scaled:%d desired:%d actual:%d overflow(%c):%.2f\n", |
1460 |
|
i, frame_type[s->type-1], -1, s->length, s->scaled_length, |
1461 |
|
s->desired_length, -1, frame_type[s->type-1], -1.0f); |
1462 |
} |
} |
|
|
|
|
return XVID_ERR_FAIL; |
|
1463 |
} |
} |
1464 |
|
#endif |