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1 : | suxen_drol | 938 | /****************************************************************************** |
2 : | * | ||
3 : | edgomez | 1054 | * XviD Bit Rate Controller Library |
4 : | * - VBR 2 pass bitrate controler implementation - | ||
5 : | suxen_drol | 938 | * |
6 : | edgomez | 1054 | * Copyright (C) 2002-2003 Edouard Gomez <ed.gomez@free.fr> |
7 : | suxen_drol | 938 | * |
8 : | edgomez | 1054 | * The curve treatment algorithm is the one implemented by Foxer <email?> and |
9 : | * Dirk Knop <dknop@gwdg.de> for the XviD vfw dynamic library. | ||
10 : | suxen_drol | 938 | * |
11 : | edgomez | 1054 | * This program is free software; you can redistribute it and/or modify |
12 : | * it under the terms of the GNU General Public License as published by | ||
13 : | * the Free Software Foundation; either version 2 of the License, or | ||
14 : | * (at your option) any later version. | ||
15 : | suxen_drol | 938 | * |
16 : | edgomez | 1054 | * This program is distributed in the hope that it will be useful, |
17 : | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
18 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
19 : | * GNU General Public License for more details. | ||
20 : | suxen_drol | 938 | * |
21 : | edgomez | 1054 | * You should have received a copy of the GNU General Public License |
22 : | * along with this program; if not, write to the Free Software | ||
23 : | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
24 : | suxen_drol | 938 | * |
25 : | syskin | 1317 | * $Id: plugin_2pass1.c,v 1.1.2.15 2004-01-21 07:14:29 syskin Exp $ |
26 : | suxen_drol | 938 | * |
27 : | *****************************************************************************/ | ||
28 : | |||
29 : | #include <stdio.h> | ||
30 : | edgomez | 1286 | #include <errno.h> /* errno var (or function with recent libc) */ |
31 : | #include <string.h> /* strerror() */ | ||
32 : | suxen_drol | 938 | |
33 : | #include "../xvid.h" | ||
34 : | #include "../image/image.h" | ||
35 : | |||
36 : | |||
37 : | edgomez | 1291 | /* This preprocessor constant controls wheteher or not, first pass is done |
38 : | * using fast ME routines to speed up the 2pass process at the expense of | ||
39 : | * less precise first pass stats */ | ||
40 : | syskin | 1287 | #define FAST1PASS |
41 : | syskin | 1317 | #define FAST1PASS_QPEL_TOO |
42 : | syskin | 1287 | |
43 : | |||
44 : | suxen_drol | 938 | /* context struct */ |
45 : | typedef struct | ||
46 : | { | ||
47 : | FILE * stat_file; | ||
48 : | suxen_drol | 1014 | |
49 : | double fq_error; | ||
50 : | suxen_drol | 938 | } rc_2pass1_t; |
51 : | |||
52 : | |||
53 : | |||
54 : | static int rc_2pass1_create(xvid_plg_create_t * create, rc_2pass1_t ** handle) | ||
55 : | { | ||
56 : | xvid_plugin_2pass1_t * param = (xvid_plugin_2pass1_t *)create->param; | ||
57 : | rc_2pass1_t * rc; | ||
58 : | |||
59 : | /* check filename */ | ||
60 : | edgomez | 1105 | if ((param->filename == NULL) || |
61 : | (param->filename != NULL && param->filename[0] == '\0')) | ||
62 : | suxen_drol | 938 | return XVID_ERR_FAIL; |
63 : | |||
64 : | /* allocate context struct */ | ||
65 : | if((rc = malloc(sizeof(rc_2pass1_t))) == NULL) | ||
66 : | return(XVID_ERR_MEMORY); | ||
67 : | |||
68 : | edgomez | 1161 | /* Initialize safe defaults for 2pass 1 */ |
69 : | suxen_drol | 938 | rc->stat_file = NULL; |
70 : | |||
71 : | /* Open the 1st pass file */ | ||
72 : | edgomez | 1202 | if((rc->stat_file = fopen(param->filename, "w+b")) == NULL) |
73 : | suxen_drol | 938 | return(XVID_ERR_FAIL); |
74 : | |||
75 : | edgomez | 1286 | /* I swear xvidcore isn't buggy, but when using mencoder+xvid4 i observe |
76 : | * this weird bug. | ||
77 : | * | ||
78 : | * Symptoms: The stats file grows until it's fclosed, but at this moment | ||
79 : | * a large part of the file is filled by 0x00 bytes w/o any | ||
80 : | * reasonable cause. The stats file is then completly unusable | ||
81 : | * | ||
82 : | * So far, i think i found "the why": | ||
83 : | * - take a MPEG stream containing 2 sequences (concatenate 2 MPEG files | ||
84 : | * together) | ||
85 : | * - Encode this MPEG file | ||
86 : | * | ||
87 : | * It should trigger the bug | ||
88 : | * | ||
89 : | * I think this is caused by some kind of race condition on mencoder module | ||
90 : | * start/stop. | ||
91 : | * - mencoder encodes the first sequence | ||
92 : | * + xvid4 module opens xvid-twopass.stats and writes stats in it. | ||
93 : | * - mencoder detects the second sequence and initialize a second | ||
94 : | * module and stops the old encoder | ||
95 : | * + new xvid4 module opens a new xvid-twopass.stats, old xvid4 | ||
96 : | * module closes it | ||
97 : | * | ||
98 : | * This is IT, got a racing condition. | ||
99 : | * Unbuffered IO, may help ... */ | ||
100 : | setbuf(rc->stat_file, NULL); | ||
101 : | |||
102 : | suxen_drol | 938 | /* |
103 : | * The File Header | ||
104 : | */ | ||
105 : | edgomez | 1202 | fprintf(rc->stat_file, "# XviD 2pass stat file (core version %d.%d.%d)\n", |
106 : | XVID_VERSION_MAJOR(XVID_VERSION), | ||
107 : | XVID_VERSION_MINOR(XVID_VERSION), | ||
108 : | XVID_VERSION_PATCH(XVID_VERSION)); | ||
109 : | fprintf(rc->stat_file, "# Please do not modify this file\n\n"); | ||
110 : | edgomez | 1161 | |
111 : | suxen_drol | 1014 | rc->fq_error = 0; |
112 : | suxen_drol | 938 | |
113 : | *handle = rc; | ||
114 : | return(0); | ||
115 : | } | ||
116 : | |||
117 : | |||
118 : | static int rc_2pass1_destroy(rc_2pass1_t * rc, xvid_plg_destroy_t * destroy) | ||
119 : | { | ||
120 : | edgomez | 1286 | if (rc->stat_file) { |
121 : | if (fclose(rc->stat_file) == EOF) { | ||
122 : | DPRINTF(XVID_DEBUG_RC, "Error closing stats file (%s)", strerror(errno)); | ||
123 : | } | ||
124 : | } | ||
125 : | rc->stat_file = NULL; /* Just a paranoid reset */ | ||
126 : | free(rc); /* as the container structure is freed anyway */ | ||
127 : | suxen_drol | 938 | return(0); |
128 : | } | ||
129 : | |||
130 : | |||
131 : | static int rc_2pass1_before(rc_2pass1_t * rc, xvid_plg_data_t * data) | ||
132 : | { | ||
133 : | edgomez | 1267 | if (data->quant <= 0) { |
134 : | if (data->zone && data->zone->mode == XVID_ZONE_QUANT) { | ||
135 : | edgomez | 1291 | /* We disable no options in quant zones, as their implementation is |
136 : | * based on the fact we do first pass exactly the same way as the | ||
137 : | * second one to have exact zone size */ | ||
138 : | edgomez | 1267 | rc->fq_error += (double)data->zone->increment / (double)data->zone->base; |
139 : | data->quant = (int)rc->fq_error; | ||
140 : | rc->fq_error -= data->quant; | ||
141 : | } else { | ||
142 : | data->quant = 2; | ||
143 : | syskin | 1287 | |
144 : | #ifdef FAST1PASS | ||
145 : | edgomez | 1291 | /* Given the fact our 2pass algorithm is based on very simple |
146 : | * rules, we can disable some options that are too CPU intensive | ||
147 : | * and do not provide the 2nd pass any benefit */ | ||
148 : | syskin | 1287 | |
149 : | edgomez | 1291 | /* First disable some motion flags */ |
150 : | data->motion_flags &= ~XVID_ME_CHROMA_PVOP; | ||
151 : | data->motion_flags &= ~XVID_ME_CHROMA_BVOP; | ||
152 : | data->motion_flags &= ~XVID_ME_USESQUARES16; | ||
153 : | data->motion_flags &= ~XVID_ME_ADVANCEDDIAMOND16; | ||
154 : | data->motion_flags &= ~XVID_ME_EXTSEARCH16; | ||
155 : | syskin | 1287 | |
156 : | edgomez | 1291 | /* And enable fast replacements */ |
157 : | data->motion_flags |= XVID_ME_FAST_MODEINTERPOLATE; | ||
158 : | data->motion_flags |= XVID_ME_SKIP_DELTASEARCH; | ||
159 : | data->motion_flags |= XVID_ME_FASTREFINE16; | ||
160 : | data->motion_flags |= XVID_ME_BFRAME_EARLYSTOP; | ||
161 : | syskin | 1287 | |
162 : | edgomez | 1291 | /* Now VOP flags (no fast replacements) */ |
163 : | data->vop_flags &= ~XVID_VOP_MODEDECISION_RD; | ||
164 : | data->vop_flags &= ~XVID_VOP_FAST_MODEDECISION_RD; | ||
165 : | data->vop_flags &= ~XVID_VOP_TRELLISQUANT; | ||
166 : | data->vop_flags &= ~XVID_VOP_INTER4V; | ||
167 : | data->vop_flags &= ~XVID_VOP_HQACPRED; | ||
168 : | |||
169 : | /* Finnaly VOL flags | ||
170 : | * | ||
171 : | * NB: Qpel cannot be disable because this option really changes | ||
172 : | * too much the texture data compressibility, and thus the | ||
173 : | * second pass gets confused by too much impredictability | ||
174 : | * of frame sizes, and actually hurts quality */ | ||
175 : | syskin | 1317 | #ifdef FAST1PASS_QPEL_TOO |
176 : | /* or maybe we can disable it after all? */ | ||
177 : | data->vol_flags &= ~XVID_VOL_QUARTERPEL; | ||
178 : | #endif | ||
179 : | syskin | 1287 | data->vol_flags &= ~XVID_VOL_GMC; |
180 : | #endif | ||
181 : | edgomez | 1267 | } |
182 : | } | ||
183 : | return(0); | ||
184 : | suxen_drol | 938 | } |
185 : | |||
186 : | |||
187 : | static int rc_2pass1_after(rc_2pass1_t * rc, xvid_plg_data_t * data) | ||
188 : | { | ||
189 : | char type; | ||
190 : | edgomez | 1278 | xvid_enc_stats_t *stats = &data->stats; |
191 : | suxen_drol | 938 | |
192 : | /* Frame type in ascii I/P/B */ | ||
193 : | edgomez | 1278 | switch(stats->type) { |
194 : | suxen_drol | 938 | case XVID_TYPE_IVOP: |
195 : | type = 'i'; | ||
196 : | break; | ||
197 : | case XVID_TYPE_PVOP: | ||
198 : | type = 'p'; | ||
199 : | break; | ||
200 : | case XVID_TYPE_BVOP: | ||
201 : | type = 'b'; | ||
202 : | break; | ||
203 : | case XVID_TYPE_SVOP: | ||
204 : | type = 's'; | ||
205 : | break; | ||
206 : | default: /* Should not go here */ | ||
207 : | return(XVID_ERR_FAIL); | ||
208 : | } | ||
209 : | |||
210 : | /* write the resulting statistics */ | ||
211 : | |||
212 : | edgomez | 1278 | fprintf(rc->stat_file, "%c %d %d %d %d %d %d\n", |
213 : | type, | ||
214 : | stats->quant, | ||
215 : | stats->kblks, | ||
216 : | stats->mblks, | ||
217 : | stats->ublks, | ||
218 : | stats->length, | ||
219 : | stats->hlength); | ||
220 : | suxen_drol | 938 | |
221 : | return(0); | ||
222 : | } | ||
223 : | |||
224 : | |||
225 : | |||
226 : | int xvid_plugin_2pass1(void * handle, int opt, void * param1, void * param2) | ||
227 : | { | ||
228 : | switch(opt) | ||
229 : | { | ||
230 : | case XVID_PLG_INFO : | ||
231 : | syskin | 1216 | case XVID_PLG_FRAME : |
232 : | suxen_drol | 938 | return 0; |
233 : | |||
234 : | case XVID_PLG_CREATE : | ||
235 : | return rc_2pass1_create((xvid_plg_create_t*)param1, param2); | ||
236 : | |||
237 : | case XVID_PLG_DESTROY : | ||
238 : | return rc_2pass1_destroy((rc_2pass1_t*)handle, (xvid_plg_destroy_t*)param1); | ||
239 : | |||
240 : | case XVID_PLG_BEFORE : | ||
241 : | return rc_2pass1_before((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1); | ||
242 : | |||
243 : | case XVID_PLG_AFTER : | ||
244 : | return rc_2pass1_after((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1); | ||
245 : | } | ||
246 : | |||
247 : | return XVID_ERR_FAIL; | ||
248 : | } |
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