1 |
/****************************************************************************** |
/****************************************************************************** |
2 |
* |
* |
3 |
* XviD Bit Rate Controller Library |
* XviD Bit Rate Controller Library |
4 |
* - VBR 2 pass bitrate controler implementation - |
* - VBR 2 pass bitrate controller implementation - |
5 |
* |
* |
6 |
* Copyright (C) 2002 Foxer <email?> |
* Copyright (C) 2002 Foxer <email?> |
7 |
* 2002 Dirk Knop <dknop@gwdg.de> |
* 2002 Dirk Knop <dknop@gwdg.de> |
25 |
* along with this program; if not, write to the Free Software |
* along with this program; if not, write to the Free Software |
26 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
27 |
* |
* |
28 |
* $Id: plugin_2pass2.c,v 1.1.2.10 2003-05-22 22:56:22 edgomez Exp $ |
* $Id: plugin_2pass2.c,v 1.1.2.14 2003-05-29 10:36:41 edgomez Exp $ |
29 |
* |
* |
30 |
*****************************************************************************/ |
*****************************************************************************/ |
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#include <math.h> |
#include <math.h> |
34 |
#include <limits.h> |
#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 |
44 |
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#define DEFAULT_PAYBACK_METHOD XVID_PAYBACK_PROP |
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#define DEFAULT_BITRATE_PAYBACK_DELAY 250 |
46 |
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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 |
49 |
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#define DEFAULT_MAX_OVERFLOW_DEGRADATION 60 |
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51 |
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/* Alt curve settings */ |
52 |
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#define DEFAULT_USE_ALT_CURVE 0 |
53 |
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#define DEFAULT_ALT_CURVE_HIGH_DIST 500 |
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#define DEFAULT_ALT_CURVE_LOW_DIST 90 |
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#define DEFAULT_ALT_CURVE_USE_AUTO 1 |
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#define DEFAULT_ALT_CURVE_AUTO_STR 30 |
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#define DEFAULT_ALT_CURVE_TYPE XVID_CURVE_LINEAR |
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#define DEFAULT_ALT_CURVE_MIN_REL_QUAL 50 |
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#define DEFAULT_ALT_CURVE_USE_AUTO_BONUS_BIAS 1 |
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#define DEFAULT_ALT_CURVE_BONUS_BIAS 50 |
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/* Keyframe settings */ |
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#define DEFAULT_KFTRESHOLD 10 |
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#define DEFAULT_KFREDUCTION 20 |
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#define DEFAULT_MIN_KEY_INTERVAL 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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double weight; |
double weight; |
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} stat_t; |
} 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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double curve_comp_scale; |
double curve_comp_scale; |
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double movie_curve; |
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 */ |
/* dynamic */ |
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int * keyframe_locations; |
int * keyframe_locations; |
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} rc_2pass2_t; |
} rc_2pass2_t; |
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/***************************************************************************** |
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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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#define BUF_SZ 1024 |
int |
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#define MAX_COLS 5 |
xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2) |
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/* open stats file, and count num frames */ |
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static int det_stats_length(rc_2pass2_t * rc, char * filename) |
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{ |
{ |
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FILE * f; |
switch(opt) { |
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int n, ignore; |
case XVID_PLG_INFO : |
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char type; |
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rc->num_frames = 0; |
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rc->num_keyframes = 0; |
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if ((f = fopen(filename, "rt")) == NULL) |
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return 0; |
return 0; |
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while((n = fscanf(f, "%c %d %d %d %d %d %d\n", |
case XVID_PLG_CREATE : |
150 |
&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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152 |
fclose(f); |
case XVID_PLG_DESTROY : |
153 |
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return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1); |
154 |
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155 |
return 1; |
case XVID_PLG_BEFORE : |
156 |
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return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
157 |
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158 |
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case XVID_PLG_AFTER : |
159 |
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return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
160 |
} |
} |
161 |
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162 |
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return XVID_ERR_FAIL; |
163 |
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} |
164 |
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/***************************************************************************** |
166 |
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* Sub plugin functions definitions |
167 |
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****************************************************************************/ |
168 |
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169 |
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/* First a few local helping function prototypes */ |
170 |
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static int det_stats_length(rc_2pass2_t * rc, char * filename); |
171 |
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static int load_stats(rc_2pass2_t *rc, char * filename); |
172 |
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static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create); |
173 |
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static void internal_scale(rc_2pass2_t *rc); |
174 |
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static void pre_process0(rc_2pass2_t * rc); |
175 |
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static void pre_process1(rc_2pass2_t * rc); |
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/* open stats file(s) and read into rc->stats array */ |
/*---------------------------------------------------------------------------- |
178 |
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*--------------------------------------------------------------------------*/ |
179 |
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180 |
static int load_stats(rc_2pass2_t *rc, char * filename) |
static int |
181 |
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rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t **handle) |
182 |
{ |
{ |
183 |
FILE * f; |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
184 |
int i, not_scaled; |
rc_2pass2_t * rc; |
185 |
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int i; |
186 |
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187 |
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rc = malloc(sizeof(rc_2pass2_t)); |
188 |
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if (rc == NULL) |
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return XVID_ERR_MEMORY; |
190 |
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191 |
if ((f = fopen(filename, "rt"))==NULL) |
rc->param = *param; |
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return 0; |
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i = 0; |
#define _INIT(a, b) if((a) <= 0) (a) = (b) |
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not_scaled = 0; |
/* Let's set our defaults if needed */ |
195 |
while(i < rc->num_frames) { |
_INIT(rc->param.keyframe_boost, DEFAULT_KEYFRAME_BOOST); |
196 |
stat_t * s = &rc->stats[i]; |
_INIT(rc->param.payback_method, DEFAULT_PAYBACK_METHOD); |
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int n; |
_INIT(rc->param.bitrate_payback_delay, DEFAULT_BITRATE_PAYBACK_DELAY); |
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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); |
200 |
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_INIT(rc->param.max_overflow_improvement, DEFAULT_MAX_OVERFLOW_IMPROVEMENT); |
201 |
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_INIT(rc->param.max_overflow_degradation, DEFAULT_MAX_OVERFLOW_DEGRADATION); |
202 |
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203 |
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/* Keyframe settings */ |
204 |
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_INIT(rc->param.kftreshold, DEFAULT_KFTRESHOLD); |
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_INIT(rc->param.kfreduction, DEFAULT_KFREDUCTION); |
206 |
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_INIT(rc->param.min_key_interval, DEFAULT_MIN_KEY_INTERVAL); |
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#undef _INIT |
208 |
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209 |
s->scaled_length = 0; |
/* Count frames in the stats file */ |
210 |
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); |
if (!det_stats_length(rc, param->filename)) { |
211 |
if (n == EOF) break; |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
212 |
if (n < 7) { |
free(rc); |
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not_scaled = 1; |
return XVID_ERR_FAIL; |
214 |
} |
} |
215 |
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if (type == 'i') { |
/* Allocate the stats' memory */ |
217 |
s->type = XVID_TYPE_IVOP; |
if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) { |
218 |
}else if (type == 'p' || type == 's') { |
free(rc); |
219 |
s->type = XVID_TYPE_PVOP; |
return XVID_ERR_MEMORY; |
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}else if (type == 'b') { |
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s->type = XVID_TYPE_BVOP; |
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}else{ /* unknown type */ |
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DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n"); |
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s->type = XVID_TYPE_PVOP; |
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} |
} |
221 |
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i++; |
/* |
223 |
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* Allocate keyframes location's memory |
224 |
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* PS: see comment in pre_process0 for the +1 location requirement |
225 |
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*/ |
226 |
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if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) { |
227 |
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free(rc->stats); |
228 |
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free(rc); |
229 |
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return XVID_ERR_MEMORY; |
230 |
} |
} |
231 |
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rc->num_frames = i; |
if (!load_stats(rc, param->filename)) { |
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DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
234 |
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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; |
238 |
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} |
239 |
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fclose(f); |
/* pre-process our stats */ |
241 |
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242 |
return 1; |
if (rc->num_frames < create->fbase/create->fincr) { |
243 |
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rc->target = rc->param.bitrate / 8; /* one second */ |
244 |
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} else { |
245 |
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rc->target = |
246 |
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((uint64_t)rc->param.bitrate * (uint64_t)rc->num_frames * (uint64_t)create->fincr) / \ |
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((uint64_t)create->fbase * 8); |
248 |
} |
} |
249 |
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250 |
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DPRINTF(XVID_DEBUG_RC, "Number of frames: %d\n", rc->num_frames); |
251 |
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DPRINTF(XVID_DEBUG_RC, "Frame rate: %d/%d\n", create->fbase, create->fincr); |
252 |
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DPRINTF(XVID_DEBUG_RC, "Target bitrate: %ld\n", rc->param.bitrate); |
253 |
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DPRINTF(XVID_DEBUG_RC, "Target filesize: %lld\n", rc->target); |
254 |
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255 |
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/* Compensate the mean frame overhead caused by the container */ |
256 |
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rc->target -= rc->num_frames*rc->param.container_frame_overhead; |
257 |
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DPRINTF(XVID_DEBUG_RC, "Container Frame overhead: %d\n", rc->param.container_frame_overhead); |
258 |
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DPRINTF(XVID_DEBUG_RC, "Target filesize (after container compensation): %lld\n", rc->target); |
259 |
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260 |
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pre_process0(rc); |
261 |
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262 |
#if 0 |
if (rc->param.bitrate) { |
263 |
static void print_stats(rc_2pass2_t * rc) |
zone_process(rc, create); |
264 |
{ |
internal_scale(rc); |
265 |
int i; |
}else{ |
266 |
DPRINTF(XVID_DEBUG_RC, "type quant length scaled_length\n"); |
/* external scaler: ignore zone */ |
267 |
for (i = 0; i < rc->num_frames; i++) { |
for (i = 0; i < rc->num_frames; i++) { |
268 |
stat_t * s = &rc->stats[i]; |
rc->stats[i].zone_mode = XVID_ZONE_WEIGHT; |
269 |
DPRINTF(XVID_DEBUG_RC, "%d %d %d %d\n", s->type, s->quant, s->length, s->scaled_length); |
rc->stats[i].weight = 1.0; |
270 |
} |
} |
271 |
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rc->avg_weight = 1.0; |
272 |
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rc->tot_quant = 0; |
273 |
} |
} |
274 |
#endif |
pre_process1(rc); |
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/* pre-process the statistics data |
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- for each type, count, tot_length, min_length, max_length |
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- set keyframes_locations |
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*/ |
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static void |
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pre_process0(rc_2pass2_t * rc) |
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{ |
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int i,j; |
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276 |
for (i=0; i<3; i++) { |
for (i=0; i<32;i++) { |
277 |
rc->count[i]=0; |
rc->pquant_error[i] = 0; |
278 |
rc->tot_length[i] = 0; |
rc->bquant_error[i] = 0; |
279 |
rc->last_quant[i] = 0; |
rc->quant_count[i] = 0; |
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rc->min_length[i] = INT_MAX; |
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280 |
} |
} |
281 |
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282 |
rc->max_length = INT_MIN; |
rc->fq_error = 0; |
283 |
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284 |
for (i=j=0; i<rc->num_frames; i++) { |
*handle = rc; |
285 |
stat_t * s = &rc->stats[i]; |
return(0); |
286 |
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} |
287 |
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288 |
rc->count[s->type-1]++; |
/*---------------------------------------------------------------------------- |
289 |
rc->tot_length[s->type-1] += s->length; |
*--------------------------------------------------------------------------*/ |
290 |
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291 |
if (s->length < rc->min_length[s->type-1]) { |
static int |
292 |
rc->min_length[s->type-1] = s->length; |
rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy) |
293 |
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{ |
294 |
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free(rc->keyframe_locations); |
295 |
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free(rc->stats); |
296 |
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free(rc); |
297 |
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return(0); |
298 |
} |
} |
299 |
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300 |
if (s->length > rc->max_length) { |
/*---------------------------------------------------------------------------- |
301 |
rc->max_length = s->length; |
*--------------------------------------------------------------------------*/ |
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} |
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302 |
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303 |
if (s->type == XVID_TYPE_IVOP) { |
static int |
304 |
rc->keyframe_locations[j] = i; |
rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data) |
305 |
j++; |
{ |
306 |
} |
stat_t * s = &rc->stats[data->frame_num]; |
307 |
} |
int overflow; |
308 |
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int desired; |
309 |
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double dbytes; |
310 |
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double curve_temp; |
311 |
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int capped_to_max_framesize = 0; |
312 |
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313 |
/* |
/* |
314 |
* The "per sequence" overflow system considers a natural sequence to be |
* This function is quite long but easy to understand. In order to simplify |
315 |
* formed by all frames between two iframes, so if we want to make sure |
* the code path (a bit), we treat 3 cases that can return immediatly. |
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* the system does not go nuts during last sequence, we force the last |
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* frame to appear in the keyframe locations array. |
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316 |
*/ |
*/ |
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rc->keyframe_locations[j] = i; |
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DPRINTF(XVID_DEBUG_RC, "Min 1st pass IFrame length: %d\n", rc->min_length[0]); |
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DPRINTF(XVID_DEBUG_RC, "Min 1st pass PFrame length: %d\n", rc->min_length[1]); |
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DPRINTF(XVID_DEBUG_RC, "Min 1st pass BFrame length: %d\n", rc->min_length[2]); |
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} |
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317 |
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318 |
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/* First case: Another plugin has already set a quantizer */ |
319 |
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if (data->quant > 0) |
320 |
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return(0); |
321 |
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322 |
/* calculate zone weight "center" */ |
/* Second case: We are in a Quant zone */ |
323 |
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if (s->zone_mode == XVID_ZONE_QUANT) { |
324 |
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325 |
static void |
rc->fq_error += s->weight; |
326 |
zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create) |
data->quant = (int)rc->fq_error; |
327 |
{ |
rc->fq_error -= data->quant; |
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int i,j; |
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int n = 0; |
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328 |
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329 |
rc->avg_weight = 0.0; |
s->desired_length = s->length; |
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rc->tot_quant = 0; |
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330 |
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331 |
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return(0); |
332 |
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if (create->num_zones == 0) { |
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for (j = 0; j < rc->num_frames; j++) { |
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rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
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rc->stats[j].weight = 1.0; |
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} |
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rc->avg_weight += rc->num_frames * 1.0; |
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n += rc->num_frames; |
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333 |
} |
} |
334 |
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335 |
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/* Third case: insufficent stats data */ |
336 |
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if (data->frame_num >= rc->num_frames) |
337 |
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return 0; |
338 |
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339 |
for(i=0; i < create->num_zones; i++) { |
/* |
340 |
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* The last case is the one every normal minded developer should fear to |
341 |
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* maintain in a project :-) |
342 |
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*/ |
343 |
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344 |
int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames; |
/* XXX: why by 8 */ |
345 |
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overflow = rc->overflow / 8; |
346 |
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347 |
if (i==0 && create->zones[i].frame > 0) { |
/* |
348 |
for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) { |
* The rc->overflow field represents the overflow in current scene (between two |
349 |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
* IFrames) so we must not forget to reset it if we are entering a new scene |
350 |
rc->stats[j].weight = 1.0; |
*/ |
351 |
} |
if (s->type == XVID_TYPE_IVOP) |
352 |
rc->avg_weight += create->zones[i].frame * 1.0; |
overflow = 0; |
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n += create->zones[i].frame; |
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} |
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353 |
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354 |
if (create->zones[i].mode == XVID_ZONE_WEIGHT) { |
desired = s->scaled_length; |
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for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
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rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
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rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
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} |
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next -= create->zones[i].frame; |
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rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base; |
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n += next; |
|
|
}else{ // XVID_ZONE_QUANT |
|
|
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
|
|
rc->stats[j].zone_mode = XVID_ZONE_QUANT; |
|
|
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
|
|
rc->tot_quant += rc->stats[j].length; |
|
|
} |
|
|
} |
|
|
} |
|
|
rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0; |
|
355 |
|
|
356 |
DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames); fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant); |
dbytes = desired; |
357 |
} |
if (s->type == XVID_TYPE_IVOP) |
358 |
|
dbytes += desired * rc->param.keyframe_boost / 100; |
359 |
|
dbytes /= rc->movie_curve; |
360 |
|
|
361 |
|
/* |
362 |
|
* We are now entering in the hard part of the algo, it was first designed |
363 |
|
* to work with i/pframes only streams, so the way it computes things is |
364 |
|
* adapted to pframes only. However we can use it if we just take care to |
365 |
|
* scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and |
366 |
|
* then before really using values depending on frame sizes, scaling the |
367 |
|
* value again with the inverse ratio |
368 |
|
*/ |
369 |
|
if (s->type == XVID_TYPE_BVOP) |
370 |
|
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
371 |
|
|
372 |
/* scale the curve */ |
/* |
373 |
|
* Apply user's choosen Payback method. Payback helps bitrate to follow the |
374 |
|
* scaled curve "paying back" past errors in curve previsions. |
375 |
|
*/ |
376 |
|
if (rc->param.payback_method == XVID_PAYBACK_BIAS) { |
377 |
|
desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay); |
378 |
|
} else { |
379 |
|
desired = (int)(rc->curve_comp_error * dbytes / |
380 |
|
rc->avg_length[XVID_TYPE_PVOP-1] / rc->param.bitrate_payback_delay); |
381 |
|
|
382 |
static void |
if (labs(desired) > fabs(rc->curve_comp_error)) { |
383 |
internal_scale(rc_2pass2_t *rc) |
desired = (int)rc->curve_comp_error; |
384 |
{ |
} |
385 |
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; |
|
386 |
|
|
387 |
|
rc->curve_comp_error -= desired; |
388 |
|
|
389 |
/* |
/* |
390 |
* Perform an initial scale pass. |
* Alt curve treatment is not that hard to understand though the formulas |
391 |
* if a frame size is scaled underneath our hardcoded minimums, then we |
* seem to be huge. Alt treatment is basically a way to soft/harden the |
392 |
* force the frame size to the minimum, and deduct the original & scaled |
* curve flux applying sine/linear/cosine ratios |
|
* frame length from the original and target total lengths |
|
393 |
*/ |
*/ |
394 |
|
|
395 |
min_size[0] = ((rc->stats[0].blks[0]*22) + 240) / 8; |
/* XXX: warning */ |
396 |
min_size[1] = (rc->stats[0].blks[0] + 88) / 8; |
curve_temp = 0; |
|
min_size[2] = 8; |
|
397 |
|
|
398 |
scaler = (double)target / (double)pass1_length; |
if ((rc->param.curve_compression_high + rc->param.curve_compression_low) && s->type != XVID_TYPE_IVOP) { |
399 |
|
|
400 |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
curve_temp = rc->curve_comp_scale; |
401 |
DPRINTF(XVID_DEBUG_RC, "undersize warning\n"); |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
402 |
scaler = 1.0; |
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
403 |
|
} else { |
404 |
|
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
405 |
} |
} |
406 |
|
|
407 |
DPRINTF(XVID_DEBUG_RC, |
/* |
408 |
"Before any correction: target=%i, tot_length=%i, scaler=%f\n", |
* End of code path for curve_temp, as told earlier, we are now |
409 |
(int)target, (int)pass1_length, scaler); |
* obliged to scale the value to a bframe one using the inverse |
410 |
|
* ratio applied earlier |
411 |
for (i=0; i<rc->num_frames; i++) { |
*/ |
412 |
stat_t * s = &rc->stats[i]; |
if (s->type == XVID_TYPE_BVOP) |
413 |
int len; |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
414 |
|
|
415 |
if (s->zone_mode == XVID_ZONE_QUANT) { |
desired += (int)curve_temp; |
416 |
s->scaled_length = s->length; |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
|
}else { |
|
|
len = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
|
|
if (len < min_size[s->type-1]) { /* force frame size */ |
|
|
s->scaled_length = min_size[s->type-1]; |
|
|
target -= s->scaled_length; |
|
|
pass1_length -= s->length; |
|
417 |
}else{ |
}else{ |
418 |
s->scaled_length = 0; |
/* |
419 |
} |
* End of code path for dbytes, as told earlier, we are now |
420 |
} |
* obliged to scale the value to a bframe one using the inverse |
421 |
} |
* ratio applied earlier |
422 |
|
*/ |
423 |
|
if (s->type == XVID_TYPE_BVOP) |
424 |
|
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
425 |
|
|
426 |
scaler = (double)target / (double)pass1_length; |
desired += (int)dbytes; |
427 |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
rc->curve_comp_error += dbytes - (int)dbytes; |
|
DPRINTF(XVID_DEBUG_RC,"undersize warning\n"); |
|
|
scaler = 1.0; |
|
428 |
} |
} |
429 |
|
|
|
DPRINTF(XVID_DEBUG_RC, |
|
|
"After correction: target=%i, tot_length=%i, scaler=%f\n", |
|
|
(int)target, (int)pass1_length, scaler); |
|
|
|
|
|
for (i=0; i<rc->num_frames; i++) { |
|
|
stat_t * s = &rc->stats[i]; |
|
430 |
|
|
431 |
if (s->scaled_length==0) { /* ignore frame with forced frame sizes */ |
/* |
432 |
s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
* We can't do bigger frames than first pass, this would be stupid as first |
433 |
|
* pass is quant=2 and that reaching quant=1 is not worth it. We would lose |
434 |
|
* many bytes and we would not not gain much quality. |
435 |
|
*/ |
436 |
|
if (desired > s->length) { |
437 |
|
rc->curve_comp_error += desired - s->length; |
438 |
|
desired = s->length; |
439 |
|
} else { |
440 |
|
if (desired < rc->min_length[s->type-1]) { |
441 |
|
if (s->type == XVID_TYPE_IVOP){ |
442 |
|
rc->curve_comp_error -= rc->min_length[XVID_TYPE_IVOP-1] - desired; |
443 |
} |
} |
444 |
|
desired = rc->min_length[s->type-1]; |
445 |
} |
} |
446 |
} |
} |
447 |
|
|
448 |
|
s->desired_length = desired; |
449 |
|
|
450 |
|
|
451 |
|
/* if this keyframe is too close to the next, reduce it's byte allotment |
452 |
|
XXX: why do we do this after setting the desired length */ |
453 |
|
|
454 |
static void |
if (s->type == XVID_TYPE_IVOP) { |
455 |
pre_process1(rc_2pass2_t * rc) |
int KFdistance = rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1]; |
|
{ |
|
|
int i; |
|
|
double total1, total2; |
|
|
uint64_t ivop_boost_total; |
|
|
|
|
|
ivop_boost_total = 0; |
|
|
rc->curve_comp_error = 0; |
|
456 |
|
|
457 |
for (i=0; i<3; i++) { |
if (KFdistance < rc->param.kftreshold) { |
|
rc->tot_scaled_length[i] = 0; |
|
|
} |
|
458 |
|
|
459 |
for (i=0; i<rc->num_frames; i++) { |
KFdistance -= rc->param.min_key_interval; |
|
stat_t * s = &rc->stats[i]; |
|
460 |
|
|
461 |
rc->tot_scaled_length[s->type-1] += s->scaled_length; |
if (KFdistance >= 0) { |
462 |
|
int KF_min_size; |
463 |
|
|
464 |
if (s->type == XVID_TYPE_IVOP) { |
KF_min_size = desired * (100 - rc->param.kfreduction) / 100; |
465 |
ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100; |
if (KF_min_size < 1) |
466 |
} |
KF_min_size = 1; |
|
} |
|
467 |
|
|
468 |
rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) / |
desired = KF_min_size + (desired - KF_min_size) * KFdistance / |
469 |
(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1])); |
(rc->param.kftreshold - rc->param.min_key_interval); |
470 |
|
|
471 |
for(i=0; i<3; i++) { |
if (desired < 1) |
472 |
if (rc->count[i] == 0 || rc->movie_curve == 0) { |
desired = 1; |
473 |
rc->avg_length[i] = 1; |
} |
|
}else{ |
|
|
rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve; |
|
474 |
} |
} |
475 |
} |
} |
476 |
|
|
477 |
/* alt curve stuff here */ |
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
478 |
|
|
479 |
if (rc->param.use_alt_curve) { |
/* Reign in overflow with huge frames */ |
480 |
const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1]; |
if (labs(overflow) > labs(rc->overflow)) |
481 |
const uint64_t tot_pvop = rc->tot_length[XVID_TYPE_PVOP-1]; |
overflow = rc->overflow; |
|
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]; |
|
|
|
|
|
rc->alt_curve_low = avg_pvop - avg_pvop * (double)rc->param.alt_curve_low_dist / 100.0; |
|
|
rc->alt_curve_low_diff = avg_pvop - rc->alt_curve_low; |
|
|
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; |
|
|
|
|
|
if (rc->param.alt_curve_use_auto) { |
|
|
if (tot_bvop + tot_pvop > tot_scaled_bvop + tot_scaled_pvop) { |
|
|
rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 / |
|
|
((double)(tot_pvop + tot_bvop) / (double)(tot_scaled_pvop + tot_scaled_bvop))) * (double)rc->param.alt_curve_auto_str / 100.0); |
|
482 |
|
|
483 |
if (rc->param.alt_curve_min_rel_qual < 20) |
/* Make sure overflow doesn't run away */ |
484 |
rc->param.alt_curve_min_rel_qual = 20; |
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
485 |
|
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
486 |
|
overflow * rc->param.max_overflow_improvement / 100; |
487 |
|
} else if (overflow < desired * rc->param.max_overflow_degradation / -100){ |
488 |
|
desired += desired * rc->param.max_overflow_degradation / -100; |
489 |
}else{ |
}else{ |
490 |
rc->param.alt_curve_min_rel_qual = 100; |
desired += overflow; |
|
} |
|
491 |
} |
} |
|
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; |
|
492 |
|
|
493 |
if (rc->param.alt_curve_low_dist > 100) { |
/* Make sure we are not higher than desired frame size */ |
494 |
switch(rc->param.alt_curve_type) { |
if (desired > rc->max_length) { |
495 |
case XVID_CURVE_SINE: // Sine Curve (high aggressiveness) |
capped_to_max_framesize = 1; |
496 |
rc->alt_curve_qual_dev *= 2.0 / (1.0 + sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))); |
desired = rc->max_length; |
497 |
rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)); |
DPRINTF(XVID_DEBUG_RC,"[%i] Capped to maximum frame size\n", |
498 |
break; |
data->frame_num); |
|
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))); |
|
|
} |
|
|
} |
|
499 |
} |
} |
|
/* --- */ |
|
|
|
|
500 |
|
|
501 |
total1=total2=0; |
/* Make sure to not scale below the minimum framesize */ |
502 |
for (i=0; i<rc->num_frames; i++) { |
if (desired < rc->min_length[s->type-1]) { |
503 |
stat_t * s = &rc->stats[i]; |
desired = rc->min_length[s->type-1]; |
504 |
|
DPRINTF(XVID_DEBUG_RC,"[%i] Capped to minimum frame size\n", |
505 |
|
data->frame_num); |
506 |
|
} |
507 |
|
|
508 |
if (s->type != XVID_TYPE_IVOP) { |
/* |
509 |
double dbytes,dbytes2; |
* Don't laugh at this very 'simple' quant<->filesize relationship, it |
510 |
|
* proves to be acurate enough for our algorithm |
511 |
|
*/ |
512 |
|
data->quant = s->quant*s->length/desired; |
513 |
|
|
514 |
dbytes = s->scaled_length / rc->movie_curve; |
/* Let's clip the computed quantizer, if needed */ |
515 |
dbytes2 = 0; /* XXX: warning */ |
if (data->quant < 1) { |
516 |
total1 += dbytes; |
data->quant = 1; |
517 |
if (s->type == XVID_TYPE_BVOP) |
} else if (data->quant > 31) { |
518 |
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
data->quant = 31; |
519 |
|
} else if (s->type != XVID_TYPE_IVOP) { |
520 |
|
|
521 |
if (rc->param.use_alt_curve) { |
/* |
522 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
* The frame quantizer has not been clipped, this appear to be a good |
523 |
|
* computed quantizer, however past frames give us some info about how |
524 |
|
* this quantizer performs against the algo prevision. Let's use this |
525 |
|
* prevision to increase the quantizer when we observe a too big |
526 |
|
* accumulated error |
527 |
|
*/ |
528 |
|
if (s->type == XVID_TYPE_BVOP) { |
529 |
|
rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
530 |
|
|
531 |
if (dbytes >= rc->alt_curve_high) { |
if (rc->bquant_error[data->quant] >= 1.0) { |
532 |
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
rc->bquant_error[data->quant] -= 1.0; |
533 |
}else{ |
data->quant++; |
|
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)))); |
|
|
} |
|
534 |
} |
} |
535 |
}else{ |
}else{ |
536 |
if (dbytes <= rc->alt_curve_low) { |
rc->pquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
|
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)))); |
|
|
} |
|
|
} |
|
537 |
|
|
538 |
|
if (rc->pquant_error[data->quant] >= 1.0) { |
539 |
|
rc->pquant_error[data->quant] -= 1.0; |
540 |
|
data->quant++; |
541 |
} |
} |
|
|
|
|
|
|
|
}else{ |
|
|
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
|
|
dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
|
|
}else{ |
|
|
dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
|
542 |
} |
} |
543 |
} |
} |
544 |
|
|
545 |
if (s->type == XVID_TYPE_BVOP) { |
/* |
546 |
dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
* Now we have a computed quant that is in the right quante range, with a |
547 |
if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1]) |
* possible +1 correction due to cumulated error. We can now safely clip |
548 |
dbytes2 = rc->min_length[XVID_TYPE_BVOP-1]; |
* the quantizer again with user's quant ranges. "Safely" means the Rate |
549 |
}else{ |
* Control could learn more about this quantizer, this knowledge is useful |
550 |
if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1]) |
* for future frames even if it this quantizer won't be really used atm, |
551 |
dbytes2 = rc->min_length[XVID_TYPE_PVOP-1]; |
* that's why we don't perform this clipping earlier. |
552 |
|
*/ |
553 |
|
if (data->quant < data->min_quant[s->type-1]) { |
554 |
|
data->quant = data->min_quant[s->type-1]; |
555 |
|
} else if (data->quant > data->max_quant[s->type-1]) { |
556 |
|
data->quant = data->max_quant[s->type-1]; |
557 |
} |
} |
558 |
total2 += dbytes2; |
|
559 |
|
/* |
560 |
|
* To avoid big quality jumps from frame to frame, we apply a "security" |
561 |
|
* rule that makes |last_quant - new_quant| <= 2. This rule only applies |
562 |
|
* to predicted frames (P and B) |
563 |
|
*/ |
564 |
|
if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) { |
565 |
|
|
566 |
|
if (data->quant > rc->last_quant[s->type-1] + 2) { |
567 |
|
data->quant = rc->last_quant[s->type-1] + 2; |
568 |
|
DPRINTF(XVID_DEBUG_RC, |
569 |
|
"[%i] p/b-frame quantizer prevented from rising too steeply\n", |
570 |
|
data->frame_num); |
571 |
|
} |
572 |
|
if (data->quant < rc->last_quant[s->type-1] - 2) { |
573 |
|
data->quant = rc->last_quant[s->type-1] - 2; |
574 |
|
DPRINTF(XVID_DEBUG_RC, |
575 |
|
"[%i] p/b-frame quantizer prevented from falling too steeply\n", |
576 |
|
data->frame_num); |
577 |
} |
} |
578 |
} |
} |
579 |
|
|
580 |
rc->curve_comp_scale = total1 / total2; |
/* |
581 |
|
* We don't want to pollute the RC history results when our computed quant |
582 |
|
* has been computed from a capped frame size |
583 |
|
*/ |
584 |
|
if (capped_to_max_framesize == 0) |
585 |
|
rc->last_quant[s->type-1] = data->quant; |
586 |
|
|
587 |
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)); |
|
588 |
} |
} |
589 |
|
|
590 |
if (rc->param.use_alt_curve) { |
/*---------------------------------------------------------------------------- |
591 |
int bonus_bias = rc->param.alt_curve_bonus_bias; |
*--------------------------------------------------------------------------*/ |
|
int oldquant = 1; |
|
|
|
|
|
if (rc->param.alt_curve_use_auto_bonus_bias) |
|
|
bonus_bias = rc->param.alt_curve_min_rel_qual; |
|
592 |
|
|
593 |
rc->alt_curve_curve_bias_bonus = (total1 - total2) * (double)bonus_bias / 100.0 / (double)(rc->num_frames /* - credits_frames */ - rc->num_keyframes); |
static int |
594 |
rc->curve_comp_scale = ((total1 - total2) * (1.0 - (double)bonus_bias / 100.0) + total2) / total2; |
rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data) |
595 |
|
{ |
596 |
|
const char frame_type[4] = { 'i', 'p', 'b', 's'}; |
597 |
|
stat_t * s = &rc->stats[data->frame_num]; |
598 |
|
|
599 |
|
/* Insufficent stats data */ |
600 |
|
if (data->frame_num >= rc->num_frames) |
601 |
|
return 0; |
602 |
|
|
603 |
/* special info for alt curve: bias bonus and quantizer thresholds */ |
rc->quant_count[data->quant]++; |
604 |
|
|
605 |
DPRINTF(XVID_DEBUG_RC, "avg scaled framesize:%i\n", (int)rc->avg_length[XVID_TYPE_PVOP-1]); |
if (data->type == XVID_TYPE_IVOP) { |
606 |
DPRINTF(XVID_DEBUG_RC, "bias bonus:%i bytes\n", (int)rc->alt_curve_curve_bias_bonus); |
int kfdiff = (rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1]); |
607 |
|
|
608 |
for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) { |
rc->overflow += rc->KFoverflow; |
609 |
double curve_temp, dbytes; |
rc->KFoverflow = s->desired_length - data->length; |
|
int newquant; |
|
610 |
|
|
611 |
dbytes = i; |
if (kfdiff > 1) { // non-consecutive keyframes |
612 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1); |
613 |
if (dbytes >= rc->alt_curve_high) { |
}else{ // consecutive keyframes |
614 |
curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
rc->overflow += rc->KFoverflow; |
615 |
}else{ |
rc->KFoverflow = 0; |
616 |
switch(rc->param.alt_curve_type) |
rc->KFoverflow_partial = 0; |
|
{ |
|
|
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)))); |
|
|
} |
|
617 |
} |
} |
618 |
|
rc->KF_idx++; |
619 |
}else{ |
}else{ |
620 |
if (dbytes <= rc->alt_curve_low) { |
// distribute part of the keyframe overflow |
621 |
curve_temp = dbytes; |
rc->overflow += s->desired_length - data->length + rc->KFoverflow_partial; |
622 |
}else{ |
rc->KFoverflow -= rc->KFoverflow_partial; |
|
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)))); |
|
|
} |
|
|
} |
|
|
} |
|
|
|
|
|
if (rc->movie_curve > 1.0) |
|
|
dbytes *= rc->movie_curve; |
|
|
|
|
|
newquant = (int)(dbytes * 2.0 / (curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus)); |
|
|
if (newquant > 1) { |
|
|
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\n", newquant, i, percent); |
|
|
} |
|
|
} |
|
623 |
} |
} |
624 |
|
|
625 |
} |
DPRINTF(XVID_DEBUG_RC, "[%i] type:%c quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
626 |
|
data->frame_num, |
627 |
|
frame_type[data->type-1], |
628 |
|
data->quant, |
629 |
|
s->length, |
630 |
|
s->scaled_length, |
631 |
|
data->length, |
632 |
|
rc->overflow); |
633 |
|
|
634 |
rc->overflow = 0; |
return(0); |
|
rc->KFoverflow = 0; |
|
|
rc->KFoverflow_partial = 0; |
|
|
rc->KF_idx = 1; |
|
635 |
} |
} |
636 |
|
|
637 |
|
/***************************************************************************** |
638 |
|
* Helper functions definition |
639 |
|
****************************************************************************/ |
640 |
|
|
641 |
|
#define BUF_SZ 1024 |
642 |
|
#define MAX_COLS 5 |
643 |
|
|
644 |
|
/* open stats file, and count num frames */ |
645 |
static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle) |
static int |
646 |
|
det_stats_length(rc_2pass2_t * rc, char * filename) |
647 |
{ |
{ |
648 |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
FILE * f; |
649 |
rc_2pass2_t * rc; |
int n, ignore; |
650 |
int i; |
char type; |
|
|
|
|
rc = malloc(sizeof(rc_2pass2_t)); |
|
|
if (rc == NULL) |
|
|
return XVID_ERR_MEMORY; |
|
651 |
|
|
652 |
rc->param = *param; |
rc->num_frames = 0; |
653 |
|
rc->num_keyframes = 0; |
654 |
|
|
655 |
if (rc->param.keyframe_boost <= 0) rc->param.keyframe_boost = 0; |
if ((f = fopen(filename, "rt")) == NULL) |
656 |
if (rc->param.payback_method <= 0) rc->param.payback_method = XVID_PAYBACK_PROP; |
return 0; |
|
if (rc->param.bitrate_payback_delay <= 0) rc->param.bitrate_payback_delay = 250; |
|
|
if (rc->param.curve_compression_high <= 0) rc->param.curve_compression_high = 0; |
|
|
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; |
|
657 |
|
|
658 |
if (!det_stats_length(rc, param->filename)){ |
while((n = fscanf(f, "%c %d %d %d %d %d %d\n", |
659 |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
&type, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) { |
660 |
free(rc); |
if (type == 'i') { |
661 |
return XVID_ERR_FAIL; |
rc->num_frames++; |
662 |
|
rc->num_keyframes++; |
663 |
|
}else if (type == 'p' || type == 'b' || type == 's') { |
664 |
|
rc->num_frames++; |
665 |
} |
} |
|
|
|
|
if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) { |
|
|
free(rc); |
|
|
return XVID_ERR_MEMORY; |
|
666 |
} |
} |
667 |
|
|
668 |
/* |
fclose(f); |
|
* We need an extra location because we do as if the last frame were an |
|
|
* 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; |
|
|
} |
|
669 |
|
|
670 |
if (!load_stats(rc, param->filename)) { |
return 1; |
|
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
|
|
free(rc->keyframe_locations); |
|
|
free(rc->stats); |
|
|
free(rc); |
|
|
return XVID_ERR_FAIL; |
|
671 |
} |
} |
672 |
|
|
673 |
/* pre-process our stats */ |
/* open stats file(s) and read into rc->stats array */ |
674 |
|
|
675 |
if (rc->num_frames < create->fbase/create->fincr) { |
static int |
676 |
rc->target = rc->param.bitrate / 8; /* one second */ |
load_stats(rc_2pass2_t *rc, char * filename) |
677 |
}else{ |
{ |
678 |
rc->target = |
FILE * f; |
679 |
((uint64_t)rc->param.bitrate * (uint64_t)rc->num_frames * (uint64_t)create->fincr) / \ |
int i, not_scaled; |
|
((uint64_t)create->fbase * 8); |
|
|
} |
|
680 |
|
|
|
DPRINTF(XVID_DEBUG_RC, "Number of frames: %d\n", rc->num_frames); |
|
|
DPRINTF(XVID_DEBUG_RC, "Frame rate: %d/%d\n", create->fbase, create->fincr); |
|
|
DPRINTF(XVID_DEBUG_RC, "Target bitrate: %ld\n", rc->param.bitrate); |
|
|
DPRINTF(XVID_DEBUG_RC, "Target filesize: %lld\n", rc->target); |
|
681 |
|
|
682 |
/* Compensate the mean frame overhead caused by the container */ |
if ((f = fopen(filename, "rt"))==NULL) |
683 |
rc->target -= rc->num_frames*rc->param.container_frame_overhead; |
return 0; |
|
DPRINTF(XVID_DEBUG_RC, "Container Frame overhead: %d\n", rc->param.container_frame_overhead); |
|
|
DPRINTF(XVID_DEBUG_RC, "Target filesize (after container compensation): %lld\n", rc->target); |
|
684 |
|
|
685 |
pre_process0(rc); |
i = 0; |
686 |
|
not_scaled = 0; |
687 |
|
while(i < rc->num_frames) { |
688 |
|
stat_t * s = &rc->stats[i]; |
689 |
|
int n; |
690 |
|
char type; |
691 |
|
|
692 |
if (rc->param.bitrate) { |
s->scaled_length = 0; |
693 |
zone_process(rc, create); |
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); |
694 |
internal_scale(rc); |
if (n == EOF) break; |
695 |
}else{ |
if (n < 7) { |
696 |
/* external scaler: ignore zone */ |
not_scaled = 1; |
|
for (i=0;i<rc->num_frames;i++) { |
|
|
rc->stats[i].zone_mode = XVID_ZONE_WEIGHT; |
|
|
rc->stats[i].weight = 1.0; |
|
697 |
} |
} |
698 |
rc->avg_weight = 1.0; |
|
699 |
rc->tot_quant = 0; |
if (type == 'i') { |
700 |
|
s->type = XVID_TYPE_IVOP; |
701 |
|
}else if (type == 'p' || type == 's') { |
702 |
|
s->type = XVID_TYPE_PVOP; |
703 |
|
}else if (type == 'b') { |
704 |
|
s->type = XVID_TYPE_BVOP; |
705 |
|
}else{ /* unknown type */ |
706 |
|
DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n"); |
707 |
|
s->type = XVID_TYPE_PVOP; |
708 |
} |
} |
|
pre_process1(rc); |
|
709 |
|
|
710 |
for (i=0; i<32;i++) { |
i++; |
|
rc->pquant_error[i] = 0; |
|
|
rc->bquant_error[i] = 0; |
|
|
rc->quant_count[i] = 0; |
|
711 |
} |
} |
712 |
|
|
713 |
rc->fq_error = 0; |
rc->num_frames = i; |
714 |
|
|
715 |
*handle = rc; |
fclose(f); |
|
return(0); |
|
|
} |
|
716 |
|
|
717 |
|
return 1; |
718 |
|
} |
719 |
|
|
720 |
static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy) |
#if 0 |
721 |
|
static void print_stats(rc_2pass2_t * rc) |
722 |
{ |
{ |
723 |
free(rc->keyframe_locations); |
int i; |
724 |
free(rc->stats); |
DPRINTF(XVID_DEBUG_RC, "type quant length scaled_length\n"); |
725 |
free(rc); |
for (i = 0; i < rc->num_frames; i++) { |
726 |
return(0); |
stat_t * s = &rc->stats[i]; |
727 |
|
DPRINTF(XVID_DEBUG_RC, "%d %d %d %d\n", s->type, s->quant, s->length, s->scaled_length); |
728 |
} |
} |
729 |
|
} |
730 |
|
#endif |
731 |
|
|
732 |
|
/* pre-process the statistics data |
733 |
|
- for each type, count, tot_length, min_length, max_length |
734 |
|
- set keyframes_locations |
735 |
|
*/ |
736 |
|
|
737 |
|
static void |
738 |
static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data) |
pre_process0(rc_2pass2_t * rc) |
739 |
{ |
{ |
740 |
stat_t * s = &rc->stats[data->frame_num]; |
int i,j; |
|
int overflow; |
|
|
int desired; |
|
|
double dbytes; |
|
|
double curve_temp; |
|
|
int capped_to_max_framesize = 0; |
|
741 |
|
|
742 |
/* |
for (i=0; i<3; i++) { |
743 |
* This function is quite long but easy to understand. In order to simplify |
rc->count[i]=0; |
744 |
* the code path (a bit), we treat 3 cases that can return immediatly. |
rc->tot_length[i] = 0; |
745 |
*/ |
rc->last_quant[i] = 0; |
746 |
|
rc->min_length[i] = INT_MAX; |
747 |
|
} |
748 |
|
|
749 |
/* First case: Another plugin has already set a quantizer */ |
rc->max_length = INT_MIN; |
|
if (data->quant > 0) |
|
|
return(0); |
|
750 |
|
|
751 |
/* Second case: We are in a Quant zone */ |
for (i=j=0; i<rc->num_frames; i++) { |
752 |
if (s->zone_mode == XVID_ZONE_QUANT) { |
stat_t * s = &rc->stats[i]; |
753 |
|
|
754 |
rc->fq_error += s->weight; |
rc->count[s->type-1]++; |
755 |
data->quant = (int)rc->fq_error; |
rc->tot_length[s->type-1] += s->length; |
|
rc->fq_error -= data->quant; |
|
756 |
|
|
757 |
s->desired_length = s->length; |
if (s->length < rc->min_length[s->type-1]) { |
758 |
|
rc->min_length[s->type-1] = s->length; |
759 |
|
} |
760 |
|
|
761 |
return(0); |
if (s->length > rc->max_length) { |
762 |
|
rc->max_length = s->length; |
763 |
|
} |
764 |
|
|
765 |
|
if (s->type == XVID_TYPE_IVOP) { |
766 |
|
rc->keyframe_locations[j] = i; |
767 |
|
j++; |
768 |
|
} |
769 |
} |
} |
|
|
|
|
/* Third case: insufficent stats data */ |
|
|
if (data->frame_num >= rc->num_frames) |
|
|
return 0; |
|
770 |
|
|
771 |
/* |
/* |
772 |
* The last case is the one every normal minded developer should fear to |
* Nota Bene: |
773 |
* maintain in a project :-) |
* The "per sequence" overflow system considers a natural sequence to be |
774 |
|
* formed by all frames between two iframes, so if we want to make sure |
775 |
|
* the system does not go nuts during last sequence, we force the last |
776 |
|
* frame to appear in the keyframe locations array. |
777 |
*/ |
*/ |
778 |
|
rc->keyframe_locations[j] = i; |
779 |
|
|
780 |
/* XXX: why by 8 */ |
DPRINTF(XVID_DEBUG_RC, "Min 1st pass IFrame length: %d\n", rc->min_length[0]); |
781 |
overflow = rc->overflow / 8; |
DPRINTF(XVID_DEBUG_RC, "Min 1st pass PFrame length: %d\n", rc->min_length[1]); |
782 |
|
DPRINTF(XVID_DEBUG_RC, "Min 1st pass BFrame length: %d\n", rc->min_length[2]); |
|
/* |
|
|
* The rc->overflow field represents the overflow in current scene (between two |
|
|
* IFrames) so we must not forget to reset it if we are enetring a new scene |
|
|
*/ |
|
|
if (s->type == XVID_TYPE_IVOP) { |
|
|
overflow = 0; |
|
783 |
} |
} |
784 |
|
|
785 |
desired = s->scaled_length; |
/* calculate zone weight "center" */ |
786 |
|
|
787 |
dbytes = desired; |
static void |
788 |
if (s->type == XVID_TYPE_IVOP) { |
zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create) |
789 |
dbytes += desired * rc->param.keyframe_boost / 100; |
{ |
790 |
} |
int i,j; |
791 |
dbytes /= rc->movie_curve; |
int n = 0; |
792 |
|
|
793 |
/* |
rc->avg_weight = 0.0; |
794 |
* We are now entering in the hard part of the algo, it was first designed |
rc->tot_quant = 0; |
|
* to work with i/pframes only streams, so the way it computes things is |
|
|
* adapted to pframes only. However we can use it if we just take care to |
|
|
* 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]; |
|
|
} |
|
795 |
|
|
|
/* |
|
|
* Apply user's choosen Payback method. Payback helps bitrate to follow the |
|
|
* scaled curve "paying back" past errors in curve previsions. |
|
|
*/ |
|
|
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); |
|
796 |
|
|
797 |
if (labs(desired) > fabs(rc->curve_comp_error)) { |
if (create->num_zones == 0) { |
798 |
desired = (int)rc->curve_comp_error; |
for (j = 0; j < rc->num_frames; j++) { |
799 |
|
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
800 |
|
rc->stats[j].weight = 1.0; |
801 |
} |
} |
802 |
|
rc->avg_weight += rc->num_frames * 1.0; |
803 |
|
n += rc->num_frames; |
804 |
} |
} |
805 |
|
|
|
rc->curve_comp_error -= desired; |
|
806 |
|
|
807 |
/* |
for(i=0; i < create->num_zones; i++) { |
|
* Alt curve treatment is not that hard to understand though the formulas |
|
|
* seem to be huge. Alt treatment is basically a way to soft/harden the |
|
|
* curve flux applying sine/linear/cosine ratios |
|
|
*/ |
|
808 |
|
|
809 |
/* XXX: warning */ |
int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames; |
|
curve_temp = 0; |
|
810 |
|
|
811 |
if (rc->param.use_alt_curve) { |
if (i==0 && create->zones[i].frame > 0) { |
812 |
if (s->type != XVID_TYPE_IVOP) { |
for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) { |
813 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
814 |
if (dbytes >= rc->alt_curve_high) { |
rc->stats[j].weight = 1.0; |
|
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)))); |
|
815 |
} |
} |
816 |
|
rc->avg_weight += create->zones[i].frame * 1.0; |
817 |
|
n += create->zones[i].frame; |
818 |
} |
} |
819 |
} else { |
|
820 |
if (dbytes <= rc->alt_curve_low){ |
if (create->zones[i].mode == XVID_ZONE_WEIGHT) { |
821 |
curve_temp = dbytes; |
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
822 |
} else { |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
823 |
switch(rc->param.alt_curve_type) { |
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
824 |
case XVID_CURVE_SINE : |
} |
825 |
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))); |
next -= create->zones[i].frame; |
826 |
break; |
rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base; |
827 |
case XVID_CURVE_LINEAR : |
n += next; |
828 |
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); |
}else{ // XVID_ZONE_QUANT |
829 |
break; |
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
830 |
case XVID_CURVE_COSINE : |
rc->stats[j].zone_mode = XVID_ZONE_QUANT; |
831 |
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)))); |
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
832 |
|
rc->tot_quant += rc->stats[j].length; |
833 |
} |
} |
834 |
} |
} |
835 |
} |
} |
836 |
|
rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0; |
837 |
|
|
838 |
/* |
DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames); fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant); |
839 |
* End of code path for curve_temp, 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) |
|
|
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
|
840 |
|
|
|
curve_temp = curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus; |
|
841 |
|
|
842 |
desired += ((int)curve_temp); |
/* scale the curve */ |
|
rc->curve_comp_error += curve_temp - (int)curve_temp; |
|
|
} 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]; |
|
843 |
|
|
844 |
desired += ((int)dbytes); |
static void |
845 |
rc->curve_comp_error += dbytes - (int)dbytes; |
internal_scale(rc_2pass2_t *rc) |
846 |
} |
{ |
847 |
|
int64_t target = rc->target - rc->tot_quant; |
848 |
|
int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant; |
849 |
|
double scaler; |
850 |
|
int i, num_MBs; |
851 |
|
int min_size[3]; |
852 |
|
|
853 |
} else if ((rc->param.curve_compression_high + rc->param.curve_compression_low) && s->type != XVID_TYPE_IVOP) { |
/* Let's compute a linear scaler in order to perform curve scaling */ |
854 |
|
scaler = (double)target / (double)pass1_length; |
855 |
|
|
856 |
curve_temp = rc->curve_comp_scale; |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
857 |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
DPRINTF(XVID_DEBUG_RC, "WARNING: Undersize detected\n"); |
858 |
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
scaler = 1.0; |
|
} else { |
|
|
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
|
859 |
} |
} |
860 |
|
|
861 |
|
DPRINTF(XVID_DEBUG_RC, |
862 |
|
"Before correction: target=%i, tot_length=%i, scaler=%f\n", |
863 |
|
(int)target, (int)pass1_length, scaler); |
864 |
|
|
865 |
/* |
/* |
866 |
* End of code path for curve_temp, as told earlier, we are now |
* Compute min frame lengths (for each frame type) according to the number |
867 |
* obliged to scale the value to a bframe one using the inverse |
* of MBs. We sum all blocks count from frame 0 (should be an IFrame, so |
868 |
* ratio applied earlier |
* blocks[0] should be enough) to know how many MBs there are. |
869 |
*/ |
*/ |
870 |
if (s->type == XVID_TYPE_BVOP) |
num_MBs = rc->stats[0].blks[0] + rc->stats[0].blks[1] + rc->stats[0].blks[2]; |
871 |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
min_size[0] = ((num_MBs*22) + 240) / 8; |
872 |
|
min_size[1] = ((num_MBs) + 88) / 8; |
873 |
|
min_size[2] = 8; |
874 |
|
|
|
desired += (int)curve_temp; |
|
|
rc->curve_comp_error += curve_temp - (int)curve_temp; |
|
|
} else { |
|
875 |
/* |
/* |
876 |
* End of code path for dbytes, as told earlier, we are now |
* Perform an initial scale pass. |
877 |
* obliged to scale the value to a bframe one using the inverse |
* If a frame size is scaled underneath our hardcoded minimums, then we |
878 |
* ratio applied earlier |
* force the frame size to the minimum, and deduct the original & scaled |
879 |
|
* frame length from the original and target total lengths |
880 |
*/ |
*/ |
881 |
if (s->type == XVID_TYPE_BVOP){ |
for (i=0; i<rc->num_frames; i++) { |
882 |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
stat_t * s = &rc->stats[i]; |
883 |
} |
int len; |
884 |
|
|
885 |
desired += (int)dbytes; |
if (s->zone_mode == XVID_ZONE_QUANT) { |
886 |
rc->curve_comp_error += dbytes - (int)dbytes; |
s->scaled_length = s->length; |
887 |
|
continue; |
888 |
} |
} |
889 |
|
|
890 |
|
/* Compute teh scaled length */ |
891 |
|
len = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
892 |
|
|
893 |
/* |
/* Compare with the computed minimum */ |
894 |
* We can't do bigger frames than first pass, this would be stupid as first |
if (len < min_size[s->type-1]) { |
895 |
* pass is quant=2 and that reaching quant=1 is not worth it. We would lose |
/* force frame size to our computed minimum */ |
896 |
* many bytes and we would not not gain much quality. |
s->scaled_length = min_size[s->type-1]; |
897 |
*/ |
target -= s->scaled_length; |
898 |
if (desired > s->length) { |
pass1_length -= s->length; |
|
rc->curve_comp_error += desired - s->length; |
|
|
desired = s->length; |
|
899 |
}else{ |
}else{ |
900 |
if (desired < rc->min_length[s->type-1]) { |
/* Do nothing for now, we'll scale this later */ |
901 |
if (s->type == XVID_TYPE_IVOP){ |
s->scaled_length = 0; |
|
rc->curve_comp_error -= rc->min_length[XVID_TYPE_IVOP-1] - desired; |
|
|
} |
|
|
desired = rc->min_length[s->type-1]; |
|
902 |
} |
} |
903 |
} |
} |
904 |
|
|
905 |
s->desired_length = desired; |
/* Correct the scaler for all non forced frames */ |
906 |
|
scaler = (double)target / (double)pass1_length; |
|
|
|
|
/* if this keyframe is too close to the next, reduce it's byte allotment |
|
|
XXX: why do we do this after setting the desired length */ |
|
|
|
|
|
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; |
|
|
|
|
|
KF_min_size = desired * (100 - rc->param.kfreduction) / 100; |
|
|
if (KF_min_size < 1) |
|
|
KF_min_size = 1; |
|
|
|
|
|
desired = KF_min_size + (desired - KF_min_size) * KFdistance / |
|
|
(rc->param.kftreshold - rc->param.min_key_interval); |
|
907 |
|
|
908 |
if (desired < 1) |
/* Detect undersizing */ |
909 |
desired = 1; |
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
910 |
} |
DPRINTF(XVID_DEBUG_RC, "WARNING: Undersize detected\n"); |
911 |
} |
scaler = 1.0; |
912 |
} |
} |
913 |
|
|
914 |
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
DPRINTF(XVID_DEBUG_RC, |
915 |
|
"After correction: target=%i, tot_length=%i, scaler=%f\n", |
916 |
/* Reign in overflow with huge frames */ |
(int)target, (int)pass1_length, scaler); |
|
if (labs(overflow) > labs(rc->overflow)) { |
|
|
overflow = rc->overflow; |
|
|
} |
|
917 |
|
|
918 |
/* Make sure overflow doesn't run away */ |
/* Do another pass with the new scaler */ |
919 |
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
for (i=0; i<rc->num_frames; i++) { |
920 |
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
stat_t * s = &rc->stats[i]; |
|
overflow * rc->param.max_overflow_improvement / 100; |
|
|
} else if (overflow < desired * rc->param.max_overflow_degradation / -100){ |
|
|
desired += desired * rc->param.max_overflow_degradation / -100; |
|
|
} else { |
|
|
desired += overflow; |
|
|
} |
|
921 |
|
|
922 |
/* Make sure we are not higher than desired frame size */ |
/* Ignore frame with forced frame sizes */ |
923 |
if (desired > rc->max_length) { |
if (s->scaled_length == 0) |
924 |
capped_to_max_framesize = 1; |
s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
|
desired = rc->max_length; |
|
|
DPRINTF(XVID_DEBUG_RC,"[%i] Capped to maximum frame size\n", |
|
|
data->frame_num); |
|
925 |
} |
} |
926 |
|
|
|
/* Make sure to not scale below the minimum framesize */ |
|
|
if (desired < rc->min_length[s->type-1]) { |
|
|
desired = rc->min_length[s->type-1]; |
|
|
DPRINTF(XVID_DEBUG_RC,"[%i] Capped to minimum frame size\n", |
|
|
data->frame_num); |
|
927 |
} |
} |
928 |
|
|
929 |
/* |
static void |
930 |
* Don't laugh at this very 'simple' quant<->filesize relationship, it |
pre_process1(rc_2pass2_t * rc) |
931 |
* proves to be acurate enough for our algorithm |
{ |
932 |
*/ |
int i; |
933 |
data->quant= (s->quant * s->length) / desired; |
double total1, total2; |
934 |
|
uint64_t ivop_boost_total; |
|
/* Let's clip the computed quantizer, if needed */ |
|
|
if (data->quant < 1) { |
|
|
data->quant = 1; |
|
|
} else if (data->quant > 31) { |
|
|
data->quant = 31; |
|
|
} else if (s->type != XVID_TYPE_IVOP) { |
|
|
|
|
|
/* |
|
|
* The frame quantizer has not been clipped, this appear to be a good |
|
|
* computed quantizer, however past frames give us some info about how |
|
|
* 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; |
|
935 |
|
|
936 |
if (rc->bquant_error[data->quant] >= 1.0) { |
ivop_boost_total = 0; |
937 |
rc->bquant_error[data->quant] -= 1.0; |
rc->curve_comp_error = 0; |
|
data->quant++; |
|
|
} |
|
|
} else { |
|
|
rc->pquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
|
938 |
|
|
939 |
if (rc->pquant_error[data->quant] >= 1.0) { |
for (i=0; i<3; i++) { |
940 |
rc->pquant_error[data->quant] -= 1.0; |
rc->tot_scaled_length[i] = 0; |
|
++data->quant; |
|
|
} |
|
|
} |
|
941 |
} |
} |
942 |
|
|
943 |
/* |
for (i=0; i<rc->num_frames; i++) { |
944 |
* Now we have a computed quant that is in the right quante range, with a |
stat_t * s = &rc->stats[i]; |
|
* possible +1 correction due to cumulated error. We can now safely clip |
|
|
* the quantizer again with user's quant ranges. "Safely" means the Rate |
|
|
* Control could learn more about this quantizer, this knowledge is useful |
|
|
* for future frames even if it this quantizer won't be really used atm, |
|
|
* that's why we don't perform this clipping earlier. |
|
|
*/ |
|
|
if (data->quant < data->min_quant[s->type-1]) { |
|
|
data->quant = data->min_quant[s->type-1]; |
|
|
} else if (data->quant > data->max_quant[s->type-1]) { |
|
|
data->quant = data->max_quant[s->type-1]; |
|
|
} |
|
945 |
|
|
946 |
/* |
rc->tot_scaled_length[s->type-1] += s->scaled_length; |
|
* To avoid big quality jumps from frame to frame, we apply a "security" |
|
|
* 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) { |
|
947 |
|
|
948 |
if (data->quant > rc->last_quant[s->type-1] + 2) { |
if (s->type == XVID_TYPE_IVOP) { |
949 |
data->quant = rc->last_quant[s->type-1] + 2; |
ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100; |
|
DPRINTF(XVID_DEBUG_RC, |
|
|
"[%i] p/b-frame quantizer prevented from rising too steeply\n", |
|
|
data->frame_num); |
|
|
} |
|
|
if (data->quant < rc->last_quant[s->type-1] - 2) { |
|
|
data->quant = rc->last_quant[s->type-1] - 2; |
|
|
DPRINTF(XVID_DEBUG_RC, |
|
|
"[%i] p/b-frame quantizer prevented from falling too steeply\n", |
|
|
data->frame_num); |
|
950 |
} |
} |
951 |
} |
} |
952 |
|
|
953 |
/* |
rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) / |
954 |
* We don't want to pollute the RC history results when our computed quant |
(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1])); |
|
* has been computed from a capped frame size |
|
|
*/ |
|
|
if (capped_to_max_framesize == 0) { |
|
|
rc->last_quant[s->type-1] = data->quant; |
|
|
} |
|
955 |
|
|
956 |
return 0; |
for(i=0; i<3; i++) { |
957 |
|
if (rc->count[i] == 0 || rc->movie_curve == 0) { |
958 |
|
rc->avg_length[i] = 1; |
959 |
|
}else{ |
960 |
|
rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve; |
961 |
|
} |
962 |
} |
} |
963 |
|
|
964 |
|
/* --- */ |
965 |
|
|
966 |
|
total1=total2=0; |
967 |
|
|
968 |
static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data) |
for (i=0; i<rc->num_frames; i++) { |
969 |
{ |
stat_t * s = &rc->stats[i]; |
|
stat_t * s = &rc->stats[data->frame_num]; |
|
|
|
|
|
/* Insufficent stats data */ |
|
|
if (data->frame_num >= rc->num_frames) |
|
|
return 0; |
|
|
|
|
|
rc->quant_count[data->quant]++; |
|
970 |
|
|
971 |
if (data->type == XVID_TYPE_IVOP) { |
if (s->type != XVID_TYPE_IVOP) { |
972 |
int kfdiff = (rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1]); |
double dbytes,dbytes2; |
973 |
|
|
974 |
rc->overflow += rc->KFoverflow; |
dbytes = s->scaled_length / rc->movie_curve; |
975 |
rc->KFoverflow = s->desired_length - data->length; |
dbytes2 = 0; /* XXX: warning */ |
976 |
|
total1 += dbytes; |
977 |
|
if (s->type == XVID_TYPE_BVOP) |
978 |
|
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
979 |
|
|
980 |
if (kfdiff > 1) { // non-consecutive keyframes |
if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) { |
981 |
rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1); |
dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0); |
|
}else{ // consecutive keyframes |
|
|
rc->overflow += rc->KFoverflow; |
|
|
rc->KFoverflow = 0; |
|
|
rc->KFoverflow_partial = 0; |
|
|
} |
|
|
rc->KF_idx++; |
|
982 |
}else{ |
}else{ |
983 |
// distribute part of the keyframe overflow |
dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
|
rc->overflow += s->desired_length - data->length + rc->KFoverflow_partial; |
|
|
rc->KFoverflow -= rc->KFoverflow_partial; |
|
984 |
} |
} |
985 |
|
|
986 |
DPRINTF(XVID_DEBUG_RC, "[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
if (s->type == XVID_TYPE_BVOP) { |
987 |
data->frame_num, |
dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
988 |
data->quant, |
if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1]) |
989 |
s->length, |
dbytes2 = rc->min_length[XVID_TYPE_BVOP-1]; |
990 |
s->scaled_length, |
}else{ |
991 |
data->length, |
if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1]) |
992 |
rc->overflow); |
dbytes2 = rc->min_length[XVID_TYPE_PVOP-1]; |
993 |
|
} |
994 |
return(0); |
total2 += dbytes2; |
995 |
|
} |
996 |
} |
} |
997 |
|
|
998 |
|
rc->curve_comp_scale = total1 / total2; |
999 |
|
|
1000 |
|
DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n", |
1001 |
|
(int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale)); |
1002 |
|
|
1003 |
int xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2) |
rc->overflow = 0; |
1004 |
{ |
rc->KFoverflow = 0; |
1005 |
switch(opt) |
rc->KFoverflow_partial = 0; |
1006 |
{ |
rc->KF_idx = 1; |
|
case XVID_PLG_INFO : |
|
|
return 0; |
|
|
|
|
|
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); |
|
|
|
|
|
case XVID_PLG_AFTER : |
|
|
return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1); |
|
|
} |
|
|
|
|
|
return XVID_ERR_FAIL; |
|
1007 |
} |
} |