3 |
* XviD Bit Rate Controller Library |
* XviD Bit Rate Controller Library |
4 |
* - VBR 2 pass bitrate controler implementation - |
* - VBR 2 pass bitrate controler implementation - |
5 |
* |
* |
6 |
* Copyright (C) 2002 Edouard Gomez <ed.gomez@wanadoo.fr> |
* Copyright (C) 2002 Foxer <email?> |
7 |
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* 2002 Dirk Knop <dknop@gwdg.de> |
8 |
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* 2002-2003 Edouard Gomez <ed.gomez@free.fr> |
9 |
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* 2003 Pete Ross <pross@xvid.org> |
10 |
* |
* |
11 |
* The curve treatment algorithm is the one implemented by Foxer <email?> and |
* This curve treatment algorithm is the one originally implemented by Foxer |
12 |
* Dirk Knop <dknop@gwdg.de> for the XviD vfw dynamic library. |
* and tuned by Dirk Knop for the XviD vfw frontend. |
13 |
* |
* |
14 |
* This program is free software; you can redistribute it and/or modify |
* This program is free software; you can redistribute it and/or modify |
15 |
* it under the terms of the GNU General Public License as published by |
* it under the terms of the GNU General Public License as published by |
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 1.1.2.1 2003-03-25 10:58:33 suxen_drol Exp $ |
* $Id: plugin_2pass2.c,v 1.1.2.8 2003-05-22 16:36:07 edgomez Exp $ |
29 |
* |
* |
30 |
*****************************************************************************/ |
*****************************************************************************/ |
31 |
|
|
41 |
typedef struct { |
typedef struct { |
42 |
int type; /* first pass type */ |
int type; /* first pass type */ |
43 |
int quant; /* first pass quant */ |
int quant; /* first pass quant */ |
44 |
|
int blks[3]; /* k,m,y blks */ |
45 |
int length; /* first pass length */ |
int length; /* first pass length */ |
46 |
int scaled_length; /* scaled length */ |
int scaled_length; /* scaled length */ |
47 |
int desired_length; |
int desired_length; /* desired length; calcuated during encoding */ |
48 |
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49 |
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int zone_mode; /* XVID_ZONE_xxx */ |
50 |
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double weight; |
51 |
} stat_t; |
} stat_t; |
52 |
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|
53 |
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61 |
/* constant statistical data */ |
/* constant statistical data */ |
62 |
int num_frames; |
int num_frames; |
63 |
int num_keyframes; |
int num_keyframes; |
64 |
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uint64_t target; /* target filesize */ |
65 |
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|
66 |
int count[3]; /* count of each frame types */ |
int count[3]; /* count of each frame types */ |
67 |
uint64_t tot_length[3]; /* total length of each frame types */ |
uint64_t tot_length[3]; /* total length of each frame types */ |
70 |
uint64_t tot_scaled_length[3]; /* total scaled length of each frame type */ |
uint64_t tot_scaled_length[3]; /* total scaled length of each frame type */ |
71 |
int max_length; /* max frame size */ |
int max_length; /* max frame size */ |
72 |
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|
73 |
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/* zone statistical data */ |
74 |
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double avg_weight; /* average weight */ |
75 |
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int64_t tot_quant; /* total length used by XVID_ZONE_QUANT zones */ |
76 |
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77 |
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78 |
double curve_comp_scale; |
double curve_comp_scale; |
79 |
double movie_curve; |
double movie_curve; |
80 |
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101 |
int KFoverflow; |
int KFoverflow; |
102 |
int KFoverflow_partial; |
int KFoverflow_partial; |
103 |
int KF_idx; |
int KF_idx; |
104 |
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105 |
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double fq_error; |
106 |
} rc_2pass2_t; |
} rc_2pass2_t; |
107 |
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108 |
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125 |
if ((f = fopen(filename, "rt")) == NULL) |
if ((f = fopen(filename, "rt")) == NULL) |
126 |
return 0; |
return 0; |
127 |
|
|
128 |
while((n = fscanf(f, "%c %d %d %d %d %d\n", |
while((n = fscanf(f, "%c %d %d %d %d %d %d\n", |
129 |
&type, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) { |
&type, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) { |
130 |
if (type == 'i') { |
if (type == 'i') { |
131 |
rc->num_frames++; |
rc->num_frames++; |
132 |
rc->num_keyframes++; |
rc->num_keyframes++; |
141 |
} |
} |
142 |
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143 |
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144 |
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145 |
/* open stats file(s) and read into rc->stats array */ |
/* open stats file(s) and read into rc->stats array */ |
146 |
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147 |
static int load_stats(rc_2pass2_t *rc, char * filename1, char * filename2) |
static int load_stats(rc_2pass2_t *rc, char * filename) |
148 |
{ |
{ |
149 |
FILE * f1, *f2; |
FILE * f; |
150 |
int i; |
int i, not_scaled; |
151 |
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152 |
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153 |
if ((f1 = fopen(filename1, "rt"))==NULL) |
if ((f = fopen(filename, "rt"))==NULL) |
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return 0; |
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if ((f2 = fopen(filename2, "rt"))==NULL) { |
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fclose(f1); |
|
154 |
return 0; |
return 0; |
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} |
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155 |
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156 |
i = 0; |
i = 0; |
157 |
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not_scaled = 0; |
158 |
while(i < rc->num_frames) { |
while(i < rc->num_frames) { |
159 |
stat_t * s = &rc->stats[i]; |
stat_t * s = &rc->stats[i]; |
160 |
int n, ignore; |
int n; |
161 |
char type; |
char type; |
162 |
|
|
163 |
n = fscanf(f1, "%c %d %d %d %d %d\n", &type, &s->quant, &s->length, &ignore, &ignore, &ignore); |
s->scaled_length = 0; |
164 |
|
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); |
165 |
if (n == EOF) break; |
if (n == EOF) break; |
166 |
|
if (n < 7) { |
167 |
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not_scaled = 1; |
168 |
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} |
169 |
|
|
170 |
if (type == 'i') { |
if (type == 'i') { |
171 |
s->type = XVID_TYPE_IVOP; |
s->type = XVID_TYPE_IVOP; |
174 |
}else if (type == 'b') { |
}else if (type == 'b') { |
175 |
s->type = XVID_TYPE_BVOP; |
s->type = XVID_TYPE_BVOP; |
176 |
}else{ /* unknown type */ |
}else{ /* unknown type */ |
177 |
printf("unk\n"); |
DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n"); |
178 |
continue; |
s->type = XVID_TYPE_PVOP; |
|
} |
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n = fscanf(f2, "%c %d %d %d %d %d\n", &type, &ignore, &s->scaled_length, &ignore, &ignore, &ignore); |
|
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if (n == EOF) break; |
|
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if (type != 'i'&& type != 'p' && type != 'b' && type != 's') { |
|
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printf("unk\n"); |
|
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continue; /* unknown type */ |
|
179 |
} |
} |
180 |
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|
181 |
i++; |
i++; |
182 |
} |
} |
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rc->num_frames = i; |
|
183 |
|
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184 |
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rc->num_frames = i; |
185 |
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|
186 |
fclose(f1); |
fclose(f); |
|
if (filename2) |
|
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fclose(f2); |
|
187 |
|
|
188 |
return 1; |
return 1; |
189 |
} |
} |
190 |
|
|
191 |
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|
192 |
/*static void internal_scale(rc_2pass2_t *rc) |
|
193 |
|
#if 0 |
194 |
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static void print_stats(rc_2pass2_t * rc) |
195 |
{ |
{ |
|
const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1]; |
|
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const double avg_bvop = rc->avg_length[XVID_TYPE_BVOP-1]; |
|
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const uint64_t tot_pvop = rc->tot_length[XVID_TYPE_PVOP-1]; |
|
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const uint64_t tot_bvop = rc->tot_length[XVID_TYPE_BVOP-1]; |
|
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uint64_t i_total = 0; |
|
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double total1,total2; |
|
196 |
int i; |
int i; |
|
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|
197 |
for (i=0; i<rc->num_frames; i++) { |
for (i=0; i<rc->num_frames; i++) { |
198 |
stat_t * s = &rc->stats[i]; |
stat_t * s = &rc->stats[i]; |
199 |
|
DPRINTF(XVID_DEBUG_RC, "%i %i %i %i\n", s->type, s->quant, s->length, s->scaled_length); |
|
if (s->type == XVID_TYPE_IVOP) { |
|
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i_total += s->length + s->length * rc->param.keyframe_boost / 100; |
|
200 |
} |
} |
201 |
} |
} |
202 |
|
#endif |
203 |
|
|
204 |
// compensate for avi frame overhead |
/* pre-process the statistics data |
205 |
rc->target_size -= rc->num_frames * 24; |
- for each type, count, tot_length, min_length, max_length |
206 |
|
- set keyframes_locations |
207 |
|
*/ |
208 |
|
|
209 |
// perform prepass to compensate for over/undersizing |
void pre_process0(rc_2pass2_t * rc) |
210 |
|
{ |
211 |
|
int i,j; |
212 |
|
|
213 |
if (rc->param.use_alt_curve) { |
for (i=0; i<3; i++) { |
214 |
|
rc->count[i]=0; |
215 |
|
rc->tot_length[i] = 0; |
216 |
|
rc->last_quant[i] = 0; |
217 |
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} |
218 |
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|
219 |
rc->alt_curve_low = avg_pvop - avg_pvop * (double)rc->param.alt_curve_low_dist / 100.0; |
for (i=j=0; i<rc->num_frames; i++) { |
220 |
rc->alt_curve_low_diff = avg_pvop - rc->alt_curve_low; |
stat_t * s = &rc->stats[i]; |
221 |
rc->alt_curve_high = avg_pvop + avg_pvop * (double)rc->param.alt_curve_high_dist / 100.0; |
|
222 |
rc->alt_curve_high_diff = rc->alt_curve_high - avg_pvop; |
rc->count[s->type-1]++; |
223 |
if (rc->alt_curve_use_auto) { |
rc->tot_length[s->type-1] += s->length; |
224 |
if (rc->movie_curve > 1.0) { |
|
225 |
rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 / rc->movie_curve) * (double)rc->param.alt_curve_auto_str / 100.0); |
if (i == 0 || s->length < rc->min_length[s->type-1]) { |
226 |
if (rc->param.alt_curve_min_rel_qual < 20) |
rc->min_length[s->type-1] = s->length; |
|
rc->param.alt_curve_min_rel_qual = 20; |
|
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}else{ |
|
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rc->param.alt_curve_min_rel_qual = 100; |
|
227 |
} |
} |
228 |
|
|
229 |
|
if (i == 0 || s->length > rc->max_length) { |
230 |
|
rc->max_length = s->length; |
231 |
} |
} |
|
rc->alt_curve_mid_qual = (1.0 + (double)rc->param.alt_curve_min_rel_qual / 100.0) / 2.0; |
|
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rc->alt_curve_qual_dev = 1.0 - rc->alt_curve_mid_qual; |
|
232 |
|
|
233 |
if (rc->param.alt_curve_low_dist > 100) { |
if (s->type == XVID_TYPE_IVOP) { |
234 |
switch(rc->param.alt_curve_type) { |
rc->keyframe_locations[j] = i; |
235 |
case XVID_CURVE_SINE : // Sine Curve (high aggressiveness) |
j++; |
|
rc->alt_curve_qual_dev *= 2.0 / (1.0 + sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))); |
|
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rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)); |
|
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break; |
|
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case XVID_CURVE_LINEAR : // Linear (medium aggressiveness) |
|
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rc->alt_curve_qual_dev *= 2.0 / (1.0 + avg_pvop / rc->alt_curve_low_diff); |
|
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rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * avg_pvop / rc->alt_curve_low_diff; |
|
|
break; |
|
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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)))); |
|
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rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))); |
|
236 |
} |
} |
237 |
} |
} |
238 |
|
|
239 |
|
/* |
240 |
|
* The "per sequence" overflow system considers a natural sequence to be |
241 |
|
* formed by all frames between two iframes, so if we want to make sure |
242 |
|
* the system does not go nuts during last sequence, we force the last |
243 |
|
* frame to appear in the keyframe locations array. |
244 |
|
*/ |
245 |
|
rc->keyframe_locations[j] = i; |
246 |
} |
} |
247 |
|
|
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total1 = 0; |
|
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total2 = 0; |
|
248 |
|
|
249 |
for (i=0; i<rc->num_frames; i++) { |
/* calculate zone weight "center" */ |
|
stat_t * s = &rc->stats[i]; |
|
250 |
|
|
251 |
if (s->type != XVID_TYPE_IVOP) { |
static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create) |
252 |
|
{ |
253 |
|
int i,j; |
254 |
|
int n = 0; |
255 |
|
|
256 |
double dbytes = s->length / rc->movie_curve; |
rc->avg_weight = 0.0; |
257 |
double dbytes2; |
rc->tot_quant = 0; |
|
total1 += dbytes; |
|
258 |
|
|
|
if (s->type == XVID_TYPE_BVOP) |
|
|
dbytes *= avg_pvop / avg_bvop; |
|
259 |
|
|
260 |
if (rc->param.use_alt_curve) { |
if (create->num_zones == 0) { |
261 |
if (dbytes > avg_pvop) { |
for (j = 0; j < rc->num_frames; j++) { |
262 |
if (dbytes >= rc->alt_curve_high) { |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
263 |
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev); |
rc->stats[j].weight = 1.0; |
|
}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 - avg_pvop) * 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 - avg_pvop) / 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 - avg_pvop) * 90.0 / rc->alt_curve_high_diff)))); |
|
264 |
} |
} |
265 |
|
rc->avg_weight += rc->num_frames * 1.0; |
266 |
|
n += rc->num_frames; |
267 |
} |
} |
268 |
}else{ |
|
269 |
if (dbytes <= rc->alt_curve_low){ |
|
270 |
dbytes2 = dbytes; |
for(i=0; i < create->num_zones; i++) { |
271 |
}else{ |
|
272 |
switch(rc->param.alt_curve_type){ |
int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames; |
273 |
case XVID_CURVE_SINE : |
|
274 |
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_low_diff))); |
if (i==0 && create->zones[i].frame > 0) { |
275 |
break; |
for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) { |
276 |
case XVID_CURVE_LINEAR : |
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
277 |
dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - avg_pvop) / rc->alt_curve_low_diff); |
rc->stats[j].weight = 1.0; |
|
break; |
|
|
case XVID_CURVE_COSINE : |
|
|
dbytes2 = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_low_diff)))); |
|
278 |
} |
} |
279 |
|
rc->avg_weight += create->zones[i].frame * 1.0; |
280 |
|
n += create->zones[i].frame; |
281 |
} |
} |
282 |
|
|
283 |
|
if (create->zones[i].mode == XVID_ZONE_WEIGHT) { |
284 |
|
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
285 |
|
rc->stats[j].zone_mode = XVID_ZONE_WEIGHT; |
286 |
|
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
287 |
} |
} |
288 |
}else{ |
next -= create->zones[i].frame; |
289 |
if (dbytes > avg_pvop) { |
rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base; |
290 |
dbytes2 = ((double)dbytes + (avg_pvop - dbytes) * |
n += next; |
291 |
rc->param.curve_compression_high / 100.0); |
}else{ // XVID_ZONE_QUANT |
292 |
}else{ |
for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) { |
293 |
dbytes2 = ((double)dbytes + (avg_pvop - dbytes) * |
rc->stats[j].zone_mode = XVID_ZONE_QUANT; |
294 |
rc->param.curve_compression_low / 100.0); |
rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base; |
295 |
|
rc->tot_quant += rc->stats[j].length; |
296 |
} |
} |
297 |
} |
} |
|
|
|
|
if (s->type == XVID_TYPE_BVOP) { |
|
|
dbytes2 *= avg_bvop / avg_pvop; |
|
298 |
} |
} |
299 |
|
rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0; |
300 |
|
|
301 |
if (dbytes2 < rc->min_length[s->type-1]) { |
DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames); fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant); |
|
dbytes = rc->min_length[s->type-1]; |
|
302 |
} |
} |
303 |
|
|
|
total2 += dbytes2; |
|
|
} |
|
|
} |
|
304 |
|
|
305 |
rc->curve_comp_scale = total1 / total2; |
/* scale the curve */ |
306 |
|
|
307 |
if (!rc->param.use_alt_curve) { |
static void internal_scale(rc_2pass2_t *rc) |
308 |
printf("middle frame size for asymmetric curve compression: %i", |
{ |
309 |
(int)(avg_pvop * rc->curve_comp_scale)); |
int64_t target = rc->target - rc->tot_quant; |
310 |
|
int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant; |
311 |
|
int min_size[3]; |
312 |
|
double scaler; |
313 |
|
int i; |
314 |
|
|
315 |
|
|
316 |
|
/* perform an initial scale pass. |
317 |
|
if a frame size is scaled underneath our hardcoded minimums, then we force the |
318 |
|
frame size to the minimum, and deduct the original & scaled frmae length from the |
319 |
|
original and target total lengths */ |
320 |
|
|
321 |
|
min_size[0] = ((rc->stats[0].blks[0]*22) + 240) / 8; |
322 |
|
min_size[1] = (rc->stats[0].blks[0] + 88) / 8; |
323 |
|
min_size[2] = 8; |
324 |
|
|
325 |
|
scaler = (double)target / (double)pass1_length; |
326 |
|
|
327 |
|
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
328 |
|
DPRINTF(XVID_DEBUG_RC, "undersize warning\n"); |
329 |
|
scaler = 1.0; |
330 |
} |
} |
|
}*/ |
|
331 |
|
|
332 |
|
DPRINTF(XVID_DEBUG_RC, "target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)pass1_length, scaler); |
333 |
|
|
334 |
|
for (i=0; i<rc->num_frames; i++) { |
335 |
|
stat_t * s = &rc->stats[i]; |
336 |
|
int len; |
337 |
|
|
338 |
|
if (s->zone_mode == XVID_ZONE_QUANT) { |
339 |
|
s->scaled_length = s->length; |
340 |
|
}else { |
341 |
|
len = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
342 |
|
if (len < min_size[s->type-1]) { /* force frame size */ |
343 |
|
s->scaled_length = min_size[s->type-1]; |
344 |
|
target -= s->scaled_length; |
345 |
|
pass1_length -= s->length; |
346 |
|
}else{ |
347 |
|
s->scaled_length = 0; |
348 |
|
} |
349 |
|
} |
350 |
|
} |
351 |
|
|
352 |
|
scaler = (double)target / (double)pass1_length; |
353 |
|
if (target <= 0 || pass1_length <= 0 || target >= pass1_length) { |
354 |
|
DPRINTF(XVID_DEBUG_RC,"undersize warning\n"); |
355 |
|
scaler = 1.0; |
356 |
|
} |
357 |
|
|
358 |
|
DPRINTF(XVID_DEBUG_RC, "target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)pass1_length, scaler); |
359 |
|
|
|
static void print_stats(rc_2pass2_t * rc) |
|
|
{ |
|
|
int i; |
|
360 |
for (i = 0; i < rc->num_frames; i++) { |
for (i = 0; i < rc->num_frames; i++) { |
361 |
stat_t * s = &rc->stats[i]; |
stat_t * s = &rc->stats[i]; |
|
printf("%i %i %i %i\n", s->type, s->quant, s->length, s->scaled_length); |
|
362 |
|
|
363 |
|
if (s->scaled_length==0) { /* ignore frame with forced frame sizes */ |
364 |
|
s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight); |
365 |
|
} |
366 |
} |
} |
367 |
} |
} |
368 |
|
|
369 |
|
|
|
/* pre-process the statistics data |
|
|
this is a clone of vfw/src/2pass.c:codec_2pass_init minus file reading, alt_curve, internal scale |
|
|
*/ |
|
370 |
|
|
371 |
void pre_process(rc_2pass2_t * rc) |
|
372 |
|
void pre_process1(rc_2pass2_t * rc) |
373 |
{ |
{ |
374 |
int i,j; |
int i; |
375 |
double total1, total2; |
double total1, total2; |
376 |
uint64_t ivop_boost_total; |
uint64_t ivop_boost_total; |
377 |
|
|
379 |
rc->curve_comp_error = 0; |
rc->curve_comp_error = 0; |
380 |
|
|
381 |
for (i=0; i<3; i++) { |
for (i=0; i<3; i++) { |
|
rc->count[i]=0; |
|
|
rc->tot_length[i] = 0; |
|
382 |
rc->tot_scaled_length[i] = 0; |
rc->tot_scaled_length[i] = 0; |
|
rc->last_quant[i] = 0; |
|
|
} |
|
|
|
|
|
for (i=0; i<32;i++) { |
|
|
rc->pquant_error[i] = 0; |
|
|
rc->bquant_error[i] = 0; |
|
|
rc->quant_count[i] = 0; |
|
383 |
} |
} |
384 |
|
|
385 |
for (i=j=0; i<rc->num_frames; i++) { |
for (i=0; i<rc->num_frames; i++) { |
386 |
stat_t * s = &rc->stats[i]; |
stat_t * s = &rc->stats[i]; |
387 |
|
|
|
rc->count[s->type-1]++; |
|
|
rc->tot_length[s->type-1] += s->length; |
|
388 |
rc->tot_scaled_length[s->type-1] += s->scaled_length; |
rc->tot_scaled_length[s->type-1] += s->scaled_length; |
389 |
|
|
|
if (i == 0 || s->length < rc->min_length[s->type-1]) { |
|
|
rc->min_length[s->type-1] = s->length; |
|
|
} |
|
|
|
|
|
if (i == 0 || s->length > rc->max_length) { |
|
|
rc->max_length = s->length; |
|
|
} |
|
|
|
|
390 |
if (s->type == XVID_TYPE_IVOP) { |
if (s->type == XVID_TYPE_IVOP) { |
391 |
ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100; |
ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100; |
|
rc->keyframe_locations[j] = i; |
|
|
j++; |
|
392 |
} |
} |
393 |
} |
} |
|
rc->keyframe_locations[j] = i; |
|
394 |
|
|
395 |
rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) / |
rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) / |
396 |
(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1])); |
(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1])); |
403 |
} |
} |
404 |
} |
} |
405 |
|
|
|
printf("--\n"); |
|
406 |
/* alt curve stuff here */ |
/* alt curve stuff here */ |
407 |
|
|
408 |
if (rc->param.use_alt_curve) { |
if (rc->param.use_alt_curve) { |
451 |
|
|
452 |
|
|
453 |
total1=total2=0; |
total1=total2=0; |
454 |
for (i=j=0; i<rc->num_frames; i++) { |
for (i=0; i<rc->num_frames; i++) { |
455 |
stat_t * s = &rc->stats[i]; |
stat_t * s = &rc->stats[i]; |
456 |
|
|
457 |
if (s->type != XVID_TYPE_IVOP) { |
if (s->type != XVID_TYPE_IVOP) { |
522 |
rc->curve_comp_scale = total1 / total2; |
rc->curve_comp_scale = total1 / total2; |
523 |
|
|
524 |
if (!rc->param.use_alt_curve) { |
if (!rc->param.use_alt_curve) { |
525 |
printf("middle frame size for asymmetric curve compression: %i\n", |
DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n", |
526 |
(int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale)); |
(int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale)); |
527 |
} |
} |
528 |
|
|
539 |
|
|
540 |
/* special info for alt curve: bias bonus and quantizer thresholds */ |
/* special info for alt curve: bias bonus and quantizer thresholds */ |
541 |
|
|
542 |
printf("avg scaled framesize:%i", (int)rc->avg_length[XVID_TYPE_PVOP-1]); |
DPRINTF(XVID_DEBUG_RC, "avg scaled framesize:%i\n", (int)rc->avg_length[XVID_TYPE_PVOP-1]); |
543 |
printf("bias bonus:%i bytes", (int)rc->alt_curve_curve_bias_bonus); |
DPRINTF(XVID_DEBUG_RC, "bias bonus:%i bytes\n", (int)rc->alt_curve_curve_bias_bonus); |
544 |
|
|
545 |
for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) { |
for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) { |
546 |
double curve_temp, dbytes; |
double curve_temp, dbytes; |
589 |
if (newquant != oldquant) { |
if (newquant != oldquant) { |
590 |
int percent = (int)((i - rc->avg_length[XVID_TYPE_PVOP-1]) * 100.0 / rc->avg_length[XVID_TYPE_PVOP-1]); |
int percent = (int)((i - rc->avg_length[XVID_TYPE_PVOP-1]) * 100.0 / rc->avg_length[XVID_TYPE_PVOP-1]); |
591 |
oldquant = newquant; |
oldquant = newquant; |
592 |
printf("quant:%i threshold at %i : %i percent", newquant, i, percent); |
DPRINTF(XVID_DEBUG_RC, "quant:%i threshold at %i : %i percent\n", newquant, i, percent); |
593 |
} |
} |
594 |
} |
} |
595 |
} |
} |
609 |
{ |
{ |
610 |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param; |
611 |
rc_2pass2_t * rc; |
rc_2pass2_t * rc; |
612 |
|
int i; |
613 |
|
|
614 |
rc = malloc(sizeof(rc_2pass2_t)); |
rc = malloc(sizeof(rc_2pass2_t)); |
615 |
if (rc == NULL) |
if (rc == NULL) |
624 |
if (rc->param.curve_compression_low <= 0) rc->param.curve_compression_low = 0; |
if (rc->param.curve_compression_low <= 0) rc->param.curve_compression_low = 0; |
625 |
if (rc->param.max_overflow_improvement <= 0) rc->param.max_overflow_improvement = 60; |
if (rc->param.max_overflow_improvement <= 0) rc->param.max_overflow_improvement = 60; |
626 |
if (rc->param.max_overflow_degradation <= 0) rc->param.max_overflow_degradation = 60; |
if (rc->param.max_overflow_degradation <= 0) rc->param.max_overflow_degradation = 60; |
|
if (rc->param.min_quant[0] <= 0) rc->param.min_quant[0] = 2; |
|
|
if (rc->param.max_quant[0] <= 0) rc->param.max_quant[0] = 31; |
|
|
if (rc->param.min_quant[1] <= 0) rc->param.min_quant[1] = 2; |
|
|
if (rc->param.max_quant[1] <= 0) rc->param.max_quant[1] = 31; |
|
|
if (rc->param.min_quant[2] <= 0) rc->param.min_quant[2] = 2; |
|
|
if (rc->param.max_quant[2] <= 0) rc->param.max_quant[2] = 31; |
|
627 |
|
|
628 |
if (rc->param.use_alt_curve <= 0) rc->param.use_alt_curve = 0; |
if (rc->param.use_alt_curve <= 0) rc->param.use_alt_curve = 0; |
629 |
if (rc->param.alt_curve_high_dist <= 0) rc->param.alt_curve_high_dist = 500; |
if (rc->param.alt_curve_high_dist <= 0) rc->param.alt_curve_high_dist = 500; |
639 |
if (rc->param.kfreduction <= 0) rc->param.kfreduction = 20; |
if (rc->param.kfreduction <= 0) rc->param.kfreduction = 20; |
640 |
if (rc->param.min_key_interval <= 0) rc->param.min_key_interval = 300; |
if (rc->param.min_key_interval <= 0) rc->param.min_key_interval = 300; |
641 |
|
|
642 |
if (!det_stats_length(rc, param->filename1)){ |
if (!det_stats_length(rc, param->filename)){ |
643 |
DPRINTF(DPRINTF_RC,"fopen %s failed\n", param->filename1); |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
644 |
free(rc); |
free(rc); |
645 |
return XVID_ERR_FAIL; |
return XVID_ERR_FAIL; |
646 |
} |
} |
650 |
return XVID_ERR_MEMORY; |
return XVID_ERR_MEMORY; |
651 |
} |
} |
652 |
|
|
653 |
/* XXX: do we need an addition location */ |
/* |
654 |
|
* We need an extra location because we do as if the last frame were an |
655 |
|
* IFrame. This is needed because our code consider that frames between |
656 |
|
* 2 IFrames form a natural sequence. So we store last frame as a |
657 |
|
* keyframe location. |
658 |
|
*/ |
659 |
if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) { |
if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) { |
660 |
free(rc->stats); |
free(rc->stats); |
661 |
free(rc); |
free(rc); |
662 |
return XVID_ERR_MEMORY; |
return XVID_ERR_MEMORY; |
663 |
} |
} |
664 |
|
|
665 |
if (!load_stats(rc, param->filename1, param->filename2)) { |
if (!load_stats(rc, param->filename)) { |
666 |
DPRINTF(DPRINTF_RC,"fopen %s,%s failed\n", param->filename1, param->filename2); |
DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename); |
667 |
free(rc->keyframe_locations); |
free(rc->keyframe_locations); |
668 |
free(rc->stats); |
free(rc->stats); |
669 |
free(rc); |
free(rc); |
671 |
} |
} |
672 |
|
|
673 |
/* pre-process our stats */ |
/* pre-process our stats */ |
674 |
pre_process(rc); |
|
675 |
|
if (rc->num_frames < create->fbase/create->fincr) { |
676 |
|
rc->target = rc->param.bitrate / 8; /* one second */ |
677 |
|
}else{ |
678 |
|
rc->target = (rc->param.bitrate * rc->num_frames * create->fincr) / (create->fbase * 8); |
679 |
|
} |
680 |
|
|
681 |
|
DPRINTF(XVID_DEBUG_RC, "rc->target : %i\n", rc->target); |
682 |
|
|
683 |
|
#if 0 |
684 |
|
rc->target -= rc->num_frames*24; /* avi file header */ |
685 |
|
#endif |
686 |
|
|
687 |
|
|
688 |
|
pre_process0(rc); |
689 |
|
|
690 |
|
if (rc->param.bitrate) { |
691 |
|
zone_process(rc, create); |
692 |
|
internal_scale(rc); |
693 |
|
}else{ |
694 |
|
/* external scaler: ignore zone */ |
695 |
|
for (i=0;i<rc->num_frames;i++) { |
696 |
|
rc->stats[i].zone_mode = XVID_ZONE_WEIGHT; |
697 |
|
rc->stats[i].weight = 1.0; |
698 |
|
} |
699 |
|
rc->avg_weight = 1.0; |
700 |
|
rc->tot_quant = 0; |
701 |
|
} |
702 |
|
pre_process1(rc); |
703 |
|
|
704 |
|
for (i=0; i<32;i++) { |
705 |
|
rc->pquant_error[i] = 0; |
706 |
|
rc->bquant_error[i] = 0; |
707 |
|
rc->quant_count[i] = 0; |
708 |
|
} |
709 |
|
|
710 |
|
rc->fq_error = 0; |
711 |
|
|
712 |
*handle = rc; |
*handle = rc; |
713 |
return(0); |
return(0); |
733 |
double curve_temp; |
double curve_temp; |
734 |
int capped_to_max_framesize = 0; |
int capped_to_max_framesize = 0; |
735 |
|
|
736 |
if (data->frame_num >= rc->num_frames) { |
/* |
737 |
/* insufficent stats data */ |
* This function is quite long but easy to understand. In order to simplify |
738 |
return 0; |
* the code path (a bit), we treat 3 cases that can return immediatly. |
739 |
|
*/ |
740 |
|
|
741 |
|
/* First case: Another plugin has already set a quantizer */ |
742 |
|
if (data->quant > 0) |
743 |
|
return(0); |
744 |
|
|
745 |
|
/* Second case: We are in a Quant zone */ |
746 |
|
if (s->zone_mode == XVID_ZONE_QUANT) { |
747 |
|
|
748 |
|
rc->fq_error += s->weight; |
749 |
|
data->quant = (int)rc->fq_error; |
750 |
|
rc->fq_error -= data->quant; |
751 |
|
|
752 |
|
s->desired_length = s->length; |
753 |
|
|
754 |
|
return(0); |
755 |
|
|
756 |
} |
} |
757 |
|
|
758 |
overflow = rc->overflow / 8; /* XXX: why by 8 */ |
/* Third case: insufficent stats data */ |
759 |
|
if (data->frame_num >= rc->num_frames) |
760 |
|
return 0; |
761 |
|
|
762 |
|
/* |
763 |
|
* The last case is the one every normal minded developer should fear to |
764 |
|
* maintain in a project :-) |
765 |
|
*/ |
766 |
|
|
767 |
|
/* XXX: why by 8 */ |
768 |
|
overflow = rc->overflow / 8; |
769 |
|
|
770 |
if (s->type == XVID_TYPE_IVOP) { /* XXX: why */ |
/* |
771 |
|
* The rc->overflow field represents the overflow in current scene (between two |
772 |
|
* IFrames) so we must not forget to reset it if we are enetring a new scene |
773 |
|
*/ |
774 |
|
if (s->type == XVID_TYPE_IVOP) { |
775 |
overflow = 0; |
overflow = 0; |
776 |
} |
} |
777 |
|
|
783 |
} |
} |
784 |
dbytes /= rc->movie_curve; |
dbytes /= rc->movie_curve; |
785 |
|
|
786 |
|
/* |
787 |
|
* We are now entering in the hard part of the algo, it was first designed |
788 |
|
* to work with i/pframes only streams, so the way it computes things is |
789 |
|
* adapted to pframes only. However we can use it if we just take care to |
790 |
|
* scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and |
791 |
|
* then before really using values depending on frame sizes, scaling the |
792 |
|
* value again with the inverse ratio |
793 |
|
*/ |
794 |
if (s->type == XVID_TYPE_BVOP) { |
if (s->type == XVID_TYPE_BVOP) { |
795 |
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1]; |
796 |
} |
} |
797 |
|
|
798 |
|
/* |
799 |
|
* Apply user's choosen Payback method. Payback helps bitrate to follow the |
800 |
|
* scaled curve "paying back" past errors in curve previsions. |
801 |
|
*/ |
802 |
if (rc->param.payback_method == XVID_PAYBACK_BIAS) { |
if (rc->param.payback_method == XVID_PAYBACK_BIAS) { |
803 |
desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay); |
desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay); |
804 |
}else{ |
}else{ |
812 |
|
|
813 |
rc->curve_comp_error -= desired; |
rc->curve_comp_error -= desired; |
814 |
|
|
815 |
/* alt curve */ |
/* |
816 |
|
* Alt curve treatment is not that hard to understand though the formulas |
817 |
|
* seem to be huge. Alt treatment is basically a way to soft/harden the |
818 |
|
* curve flux applying sine/linear/cosine ratios |
819 |
|
*/ |
820 |
|
|
821 |
curve_temp = 0; /* XXX: warning */ |
/* XXX: warning */ |
822 |
|
curve_temp = 0; |
823 |
|
|
824 |
if (rc->param.use_alt_curve) { |
if (rc->param.use_alt_curve) { |
825 |
if (s->type != XVID_TYPE_IVOP) { |
if (s->type != XVID_TYPE_IVOP) { |
854 |
} |
} |
855 |
} |
} |
856 |
} |
} |
857 |
|
|
858 |
|
/* |
859 |
|
* End of code path for curve_temp, as told earlier, we are now |
860 |
|
* obliged to scale the value to a bframe one using the inverse |
861 |
|
* ratio applied earlier |
862 |
|
*/ |
863 |
if (s->type == XVID_TYPE_BVOP) |
if (s->type == XVID_TYPE_BVOP) |
864 |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
865 |
|
|
868 |
desired += ((int)curve_temp); |
desired += ((int)curve_temp); |
869 |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
870 |
}else{ |
}else{ |
871 |
|
/* |
872 |
|
* End of code path for dbytes, as told earlier, we are now |
873 |
|
* obliged to scale the value to a bframe one using the inverse |
874 |
|
* ratio applied earlier |
875 |
|
*/ |
876 |
if (s->type == XVID_TYPE_BVOP) |
if (s->type == XVID_TYPE_BVOP) |
877 |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
878 |
|
|
889 |
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0); |
890 |
} |
} |
891 |
|
|
892 |
if (s->type == XVID_TYPE_BVOP){ |
/* |
893 |
|
* End of code path for curve_temp, as told earlier, we are now |
894 |
|
* obliged to scale the value to a bframe one using the inverse |
895 |
|
* ratio applied earlier |
896 |
|
*/ |
897 |
|
if (s->type == XVID_TYPE_BVOP) |
898 |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
|
} |
|
899 |
|
|
900 |
desired += (int)curve_temp; |
desired += (int)curve_temp; |
901 |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
rc->curve_comp_error += curve_temp - (int)curve_temp; |
902 |
}else{ |
}else{ |
903 |
|
/* |
904 |
|
* End of code path for dbytes, as told earlier, we are now |
905 |
|
* obliged to scale the value to a bframe one using the inverse |
906 |
|
* ratio applied earlier |
907 |
|
*/ |
908 |
if (s->type == XVID_TYPE_BVOP){ |
if (s->type == XVID_TYPE_BVOP){ |
909 |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1]; |
910 |
} |
} |
913 |
rc->curve_comp_error += dbytes - (int)dbytes; |
rc->curve_comp_error += dbytes - (int)dbytes; |
914 |
} |
} |
915 |
|
|
916 |
|
|
917 |
|
/* |
918 |
|
* We can't do bigger frames than first pass, this would be stupid as first |
919 |
|
* pass is quant=2 and that reaching quant=1 is not worth it. We would lose |
920 |
|
* many bytes and we would not not gain much quality. |
921 |
|
*/ |
922 |
if (desired > s->length){ |
if (desired > s->length){ |
923 |
rc->curve_comp_error += desired - s->length; |
rc->curve_comp_error += desired - s->length; |
924 |
desired = s->length; |
desired = s->length; |
962 |
|
|
963 |
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]); |
964 |
|
|
965 |
// Foxer: reign in overflow with huge frames |
/* Reign in overflow with huge frames */ |
966 |
if (labs(overflow) > labs(rc->overflow)) { |
if (labs(overflow) > labs(rc->overflow)) { |
967 |
overflow = rc->overflow; |
overflow = rc->overflow; |
968 |
} |
} |
969 |
|
|
970 |
// Foxer: make sure overflow doesn't run away |
/* Make sure overflow doesn't run away */ |
|
|
|
971 |
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
if (overflow > desired * rc->param.max_overflow_improvement / 100) { |
972 |
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 : |
973 |
overflow * rc->param.max_overflow_improvement / 100; |
overflow * rc->param.max_overflow_improvement / 100; |
977 |
desired += overflow; |
desired += overflow; |
978 |
} |
} |
979 |
|
|
980 |
|
/* Make sure we are not higher than desired frame size */ |
981 |
if (desired > rc->max_length) { |
if (desired > rc->max_length) { |
982 |
capped_to_max_framesize = 1; |
capped_to_max_framesize = 1; |
983 |
desired = rc->max_length; |
desired = rc->max_length; |
984 |
} |
} |
985 |
|
|
986 |
// make sure to not scale below the minimum framesize |
/* Make sure to not scale below the minimum framesize */ |
987 |
if (desired < rc->min_length[s->type-1]) { |
if (desired < rc->min_length[s->type-1]) |
988 |
desired = rc->min_length[s->type-1]; |
desired = rc->min_length[s->type-1]; |
|
} |
|
|
|
|
989 |
|
|
990 |
// very 'simple' quant<->filesize relationship |
/* |
991 |
|
* Don't laugh at this very 'simple' quant<->filesize relationship, it |
992 |
|
* proves to be acurate enough for our algorithm |
993 |
|
*/ |
994 |
data->quant= (s->quant * s->length) / desired; |
data->quant= (s->quant * s->length) / desired; |
995 |
|
|
996 |
|
/* Let's clip the computed quantizer, if needed */ |
997 |
if (data->quant < 1) { |
if (data->quant < 1) { |
998 |
data->quant = 1; |
data->quant = 1; |
999 |
} else if (data->quant > 31) { |
} else if (data->quant > 31) { |
1000 |
data->quant = 31; |
data->quant = 31; |
1001 |
} |
} else if (s->type != XVID_TYPE_IVOP) { |
1002 |
else if (s->type != XVID_TYPE_IVOP) |
|
1003 |
{ |
/* |
1004 |
// Foxer: aid desired quantizer precision by accumulating decision error |
* The frame quantizer has not been clipped, this appear to be a good |
1005 |
|
* computed quantizer, however past frames give us some info about how |
1006 |
|
* this quantizer performs against the algo prevision. Let's use this |
1007 |
|
* prevision to increase the quantizer when we observe a too big |
1008 |
|
* accumulated error |
1009 |
|
*/ |
1010 |
if (s->type== XVID_TYPE_BVOP) { |
if (s->type== XVID_TYPE_BVOP) { |
1011 |
rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant; |
1012 |
|
|
1024 |
} |
} |
1025 |
} |
} |
1026 |
|
|
1027 |
/* cap to min/max quant */ |
/* |
1028 |
|
* Now we have a computed quant that is in the right quante range, with a |
1029 |
if (data->quant < rc->param.min_quant[s->type-1]) { |
* possible +1 correction due to cumulated error. We can now safely clip |
1030 |
data->quant = rc->param.min_quant[s->type-1]; |
* the quantizer again with user's quant ranges. "Safely" means the Rate |
1031 |
}else if (data->quant > rc->param.max_quant[s->type-1]) { |
* Control could learn more about this quantizer, this knowledge is useful |
1032 |
data->quant = rc->param.max_quant[s->type-1]; |
* for future frames even if it this quantizer won't be really used atm, |
1033 |
|
* that's why we don't perform this clipping earlier. |
1034 |
|
*/ |
1035 |
|
if (data->quant < data->min_quant[s->type-1]) { |
1036 |
|
data->quant = data->min_quant[s->type-1]; |
1037 |
|
} else if (data->quant > data->max_quant[s->type-1]) { |
1038 |
|
data->quant = data->max_quant[s->type-1]; |
1039 |
} |
} |
1040 |
|
|
1041 |
/* subsequent p/b frame quants can only be +- 2 */ |
/* |
1042 |
|
* To avoid big quality jumps from frame to frame, we apply a "security" |
1043 |
|
* rule that makes |last_quant - new_quant| <= 2. This rule only applies |
1044 |
|
* to predicted frames (P and B) |
1045 |
|
*/ |
1046 |
if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) { |
if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) { |
1047 |
|
|
1048 |
if (data->quant > rc->last_quant[s->type-1] + 2) { |
if (data->quant > rc->last_quant[s->type-1] + 2) { |
1049 |
data->quant = rc->last_quant[s->type-1] + 2; |
data->quant = rc->last_quant[s->type-1] + 2; |
1050 |
DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from rising too steeply"); |
DPRINTF(XVID_DEBUG_RC, "p/b-frame quantizer prevented from rising too steeply\n"); |
1051 |
} |
} |
1052 |
if (data->quant < rc->last_quant[s->type-1] - 2) { |
if (data->quant < rc->last_quant[s->type-1] - 2) { |
1053 |
data->quant = rc->last_quant[s->type-1] - 2; |
data->quant = rc->last_quant[s->type-1] - 2; |
1054 |
DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from falling too steeply"); |
DPRINTF(XVID_DEBUG_RC, "p/b-frame quantizer prevented from falling too steeply\n"); |
1055 |
} |
} |
1056 |
} |
} |
1057 |
|
|
1058 |
|
/* |
1059 |
|
* We don't want to pollute the RC history results when our computed quant |
1060 |
|
* has been computed from a capped frame size |
1061 |
|
*/ |
1062 |
if (capped_to_max_framesize == 0) { |
if (capped_to_max_framesize == 0) { |
1063 |
rc->last_quant[s->type-1] = data->quant; |
rc->last_quant[s->type-1] = data->quant; |
1064 |
} |
} |
1072 |
{ |
{ |
1073 |
stat_t * s = &rc->stats[data->frame_num]; |
stat_t * s = &rc->stats[data->frame_num]; |
1074 |
|
|
1075 |
if (data->frame_num >= rc->num_frames) { |
/* Insufficent stats data */ |
1076 |
/* insufficent stats data */ |
if (data->frame_num >= rc->num_frames) |
1077 |
return 0; |
return 0; |
|
} |
|
1078 |
|
|
1079 |
rc->quant_count[data->quant]++; |
rc->quant_count[data->quant]++; |
1080 |
|
|
1098 |
rc->KFoverflow -= rc->KFoverflow_partial; |
rc->KFoverflow -= rc->KFoverflow_partial; |
1099 |
} |
} |
1100 |
|
|
1101 |
printf("[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
DPRINTF(XVID_DEBUG_RC, "[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n", |
1102 |
data->frame_num, |
data->frame_num, |
1103 |
data->quant, |
data->quant, |
1104 |
s->length, |
s->length, |