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| 1 : | edgomez | 1.2 | /****************************************************************************** |
| 2 : | * | ||
| 3 : | Isibaar | 1.4 | * Xvid Bit Rate Controller Library |
| 4 : | edgomez | 1.2 | * - VBR 2 pass bitrate controler implementation - |
| 5 : | * | ||
| 6 : | * Copyright (C) 2002-2003 Edouard Gomez <ed.gomez@free.fr> | ||
| 7 : | * | ||
| 8 : | * The curve treatment algorithm is the one implemented by Foxer <email?> and | ||
| 9 : | Isibaar | 1.4 | * Dirk Knop <dknop@gwdg.de> for the Xvid vfw dynamic library. |
| 10 : | edgomez | 1.2 | * |
| 11 : | * 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 : | * | ||
| 16 : | * 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 : | * | ||
| 21 : | * 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 : | * | ||
| 25 : | Isibaar | 1.4 | * $Id: plugin_2pass1.c,v 1.3 2004/07/18 12:46:44 syskin Exp $ |
| 26 : | edgomez | 1.2 | * |
| 27 : | *****************************************************************************/ | ||
| 28 : | |||
| 29 : | #include <stdio.h> | ||
| 30 : | #include <errno.h> /* errno var (or function with recent libc) */ | ||
| 31 : | #include <string.h> /* strerror() */ | ||
| 32 : | |||
| 33 : | #include "../xvid.h" | ||
| 34 : | #include "../image/image.h" | ||
| 35 : | |||
| 36 : | |||
| 37 : | /* 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 : | #define FAST1PASS | ||
| 41 : | #define FAST1PASS_QPEL_TOO | ||
| 42 : | |||
| 43 : | |||
| 44 : | /* context struct */ | ||
| 45 : | typedef struct | ||
| 46 : | { | ||
| 47 : | FILE * stat_file; | ||
| 48 : | |||
| 49 : | double fq_error; | ||
| 50 : | } 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 : | if ((param->filename == NULL) || | ||
| 61 : | (param->filename != NULL && param->filename[0] == '\0')) | ||
| 62 : | 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 : | /* Initialize safe defaults for 2pass 1 */ | ||
| 69 : | rc->stat_file = NULL; | ||
| 70 : | |||
| 71 : | /* Open the 1st pass file */ | ||
| 72 : | if((rc->stat_file = fopen(param->filename, "w+b")) == NULL) | ||
| 73 : | return(XVID_ERR_FAIL); | ||
| 74 : | |||
| 75 : | /* 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 : | /* | ||
| 103 : | * The File Header | ||
| 104 : | */ | ||
| 105 : | 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 : | |||
| 111 : | rc->fq_error = 0; | ||
| 112 : | |||
| 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 : | 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 : | return(0); | ||
| 128 : | } | ||
| 129 : | |||
| 130 : | |||
| 131 : | static int rc_2pass1_before(rc_2pass1_t * rc, xvid_plg_data_t * data) | ||
| 132 : | { | ||
| 133 : | if (data->quant <= 0) { | ||
| 134 : | if (data->zone && data->zone->mode == XVID_ZONE_QUANT) { | ||
| 135 : | /* 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 : | 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 : | |||
| 144 : | #ifdef FAST1PASS | ||
| 145 : | /* 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 : | |||
| 149 : | /* 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 : | |||
| 156 : | /* 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 : | |||
| 162 : | /* Now VOP flags (no fast replacements) */ | ||
| 163 : | data->vop_flags &= ~XVID_VOP_MODEDECISION_RD; | ||
| 164 : | syskin | 1.3 | data->vop_flags &= ~XVID_VOP_RD_BVOP; |
| 165 : | edgomez | 1.2 | data->vop_flags &= ~XVID_VOP_FAST_MODEDECISION_RD; |
| 166 : | data->vop_flags &= ~XVID_VOP_TRELLISQUANT; | ||
| 167 : | data->vop_flags &= ~XVID_VOP_INTER4V; | ||
| 168 : | data->vop_flags &= ~XVID_VOP_HQACPRED; | ||
| 169 : | |||
| 170 : | /* Finnaly VOL flags | ||
| 171 : | * | ||
| 172 : | * NB: Qpel cannot be disable because this option really changes | ||
| 173 : | * too much the texture data compressibility, and thus the | ||
| 174 : | * second pass gets confused by too much impredictability | ||
| 175 : | * of frame sizes, and actually hurts quality */ | ||
| 176 : | #ifdef FAST1PASS_QPEL_TOO | ||
| 177 : | /* or maybe we can disable it after all? */ | ||
| 178 : | data->vol_flags &= ~XVID_VOL_QUARTERPEL; | ||
| 179 : | #endif | ||
| 180 : | data->vol_flags &= ~XVID_VOL_GMC; | ||
| 181 : | #endif | ||
| 182 : | } | ||
| 183 : | } | ||
| 184 : | return(0); | ||
| 185 : | } | ||
| 186 : | |||
| 187 : | |||
| 188 : | static int rc_2pass1_after(rc_2pass1_t * rc, xvid_plg_data_t * data) | ||
| 189 : | { | ||
| 190 : | char type; | ||
| 191 : | xvid_enc_stats_t *stats = &data->stats; | ||
| 192 : | |||
| 193 : | /* Frame type in ascii I/P/B */ | ||
| 194 : | switch(stats->type) { | ||
| 195 : | case XVID_TYPE_IVOP: | ||
| 196 : | type = 'i'; | ||
| 197 : | break; | ||
| 198 : | case XVID_TYPE_PVOP: | ||
| 199 : | type = 'p'; | ||
| 200 : | break; | ||
| 201 : | case XVID_TYPE_BVOP: | ||
| 202 : | type = 'b'; | ||
| 203 : | break; | ||
| 204 : | case XVID_TYPE_SVOP: | ||
| 205 : | type = 's'; | ||
| 206 : | break; | ||
| 207 : | default: /* Should not go here */ | ||
| 208 : | return(XVID_ERR_FAIL); | ||
| 209 : | } | ||
| 210 : | |||
| 211 : | /* write the resulting statistics */ | ||
| 212 : | |||
| 213 : | fprintf(rc->stat_file, "%c %d %d %d %d %d %d\n", | ||
| 214 : | type, | ||
| 215 : | stats->quant, | ||
| 216 : | stats->kblks, | ||
| 217 : | stats->mblks, | ||
| 218 : | stats->ublks, | ||
| 219 : | stats->length, | ||
| 220 : | stats->hlength); | ||
| 221 : | |||
| 222 : | return(0); | ||
| 223 : | } | ||
| 224 : | |||
| 225 : | |||
| 226 : | |||
| 227 : | int xvid_plugin_2pass1(void * handle, int opt, void * param1, void * param2) | ||
| 228 : | { | ||
| 229 : | switch(opt) | ||
| 230 : | { | ||
| 231 : | case XVID_PLG_INFO : | ||
| 232 : | case XVID_PLG_FRAME : | ||
| 233 : | return 0; | ||
| 234 : | |||
| 235 : | case XVID_PLG_CREATE : | ||
| 236 : | return rc_2pass1_create((xvid_plg_create_t*)param1, param2); | ||
| 237 : | |||
| 238 : | case XVID_PLG_DESTROY : | ||
| 239 : | return rc_2pass1_destroy((rc_2pass1_t*)handle, (xvid_plg_destroy_t*)param1); | ||
| 240 : | |||
| 241 : | case XVID_PLG_BEFORE : | ||
| 242 : | return rc_2pass1_before((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1); | ||
| 243 : | |||
| 244 : | case XVID_PLG_AFTER : | ||
| 245 : | return rc_2pass1_after((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1); | ||
| 246 : | } | ||
| 247 : | |||
| 248 : | return XVID_ERR_FAIL; | ||
| 249 : | } |
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