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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 : | edgomez | 1286 | * $Id: plugin_2pass1.c,v 1.1.2.12 2003-12-20 15:30:03 edgomez 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 : | /* context struct */ | ||
| 38 : | typedef struct | ||
| 39 : | { | ||
| 40 : | FILE * stat_file; | ||
| 41 : | suxen_drol | 1014 | |
| 42 : | double fq_error; | ||
| 43 : | suxen_drol | 938 | } rc_2pass1_t; |
| 44 : | |||
| 45 : | |||
| 46 : | |||
| 47 : | static int rc_2pass1_create(xvid_plg_create_t * create, rc_2pass1_t ** handle) | ||
| 48 : | { | ||
| 49 : | xvid_plugin_2pass1_t * param = (xvid_plugin_2pass1_t *)create->param; | ||
| 50 : | rc_2pass1_t * rc; | ||
| 51 : | |||
| 52 : | /* check filename */ | ||
| 53 : | edgomez | 1105 | if ((param->filename == NULL) || |
| 54 : | (param->filename != NULL && param->filename[0] == '\0')) | ||
| 55 : | suxen_drol | 938 | return XVID_ERR_FAIL; |
| 56 : | |||
| 57 : | /* allocate context struct */ | ||
| 58 : | if((rc = malloc(sizeof(rc_2pass1_t))) == NULL) | ||
| 59 : | return(XVID_ERR_MEMORY); | ||
| 60 : | |||
| 61 : | edgomez | 1161 | /* Initialize safe defaults for 2pass 1 */ |
| 62 : | suxen_drol | 938 | rc->stat_file = NULL; |
| 63 : | |||
| 64 : | /* Open the 1st pass file */ | ||
| 65 : | edgomez | 1202 | if((rc->stat_file = fopen(param->filename, "w+b")) == NULL) |
| 66 : | suxen_drol | 938 | return(XVID_ERR_FAIL); |
| 67 : | |||
| 68 : | edgomez | 1286 | /* I swear xvidcore isn't buggy, but when using mencoder+xvid4 i observe |
| 69 : | * this weird bug. | ||
| 70 : | * | ||
| 71 : | * Symptoms: The stats file grows until it's fclosed, but at this moment | ||
| 72 : | * a large part of the file is filled by 0x00 bytes w/o any | ||
| 73 : | * reasonable cause. The stats file is then completly unusable | ||
| 74 : | * | ||
| 75 : | * So far, i think i found "the why": | ||
| 76 : | * - take a MPEG stream containing 2 sequences (concatenate 2 MPEG files | ||
| 77 : | * together) | ||
| 78 : | * - Encode this MPEG file | ||
| 79 : | * | ||
| 80 : | * It should trigger the bug | ||
| 81 : | * | ||
| 82 : | * I think this is caused by some kind of race condition on mencoder module | ||
| 83 : | * start/stop. | ||
| 84 : | * - mencoder encodes the first sequence | ||
| 85 : | * + xvid4 module opens xvid-twopass.stats and writes stats in it. | ||
| 86 : | * - mencoder detects the second sequence and initialize a second | ||
| 87 : | * module and stops the old encoder | ||
| 88 : | * + new xvid4 module opens a new xvid-twopass.stats, old xvid4 | ||
| 89 : | * module closes it | ||
| 90 : | * | ||
| 91 : | * This is IT, got a racing condition. | ||
| 92 : | * Unbuffered IO, may help ... */ | ||
| 93 : | setbuf(rc->stat_file, NULL); | ||
| 94 : | |||
| 95 : | suxen_drol | 938 | /* |
| 96 : | * The File Header | ||
| 97 : | */ | ||
| 98 : | edgomez | 1202 | fprintf(rc->stat_file, "# XviD 2pass stat file (core version %d.%d.%d)\n", |
| 99 : | XVID_VERSION_MAJOR(XVID_VERSION), | ||
| 100 : | XVID_VERSION_MINOR(XVID_VERSION), | ||
| 101 : | XVID_VERSION_PATCH(XVID_VERSION)); | ||
| 102 : | fprintf(rc->stat_file, "# Please do not modify this file\n\n"); | ||
| 103 : | edgomez | 1161 | |
| 104 : | suxen_drol | 1014 | rc->fq_error = 0; |
| 105 : | suxen_drol | 938 | |
| 106 : | *handle = rc; | ||
| 107 : | return(0); | ||
| 108 : | } | ||
| 109 : | |||
| 110 : | |||
| 111 : | static int rc_2pass1_destroy(rc_2pass1_t * rc, xvid_plg_destroy_t * destroy) | ||
| 112 : | { | ||
| 113 : | edgomez | 1286 | if (rc->stat_file) { |
| 114 : | if (fclose(rc->stat_file) == EOF) { | ||
| 115 : | DPRINTF(XVID_DEBUG_RC, "Error closing stats file (%s)", strerror(errno)); | ||
| 116 : | } | ||
| 117 : | } | ||
| 118 : | rc->stat_file = NULL; /* Just a paranoid reset */ | ||
| 119 : | free(rc); /* as the container structure is freed anyway */ | ||
| 120 : | suxen_drol | 938 | return(0); |
| 121 : | } | ||
| 122 : | |||
| 123 : | |||
| 124 : | static int rc_2pass1_before(rc_2pass1_t * rc, xvid_plg_data_t * data) | ||
| 125 : | { | ||
| 126 : | edgomez | 1267 | if (data->quant <= 0) { |
| 127 : | if (data->zone && data->zone->mode == XVID_ZONE_QUANT) { | ||
| 128 : | rc->fq_error += (double)data->zone->increment / (double)data->zone->base; | ||
| 129 : | data->quant = (int)rc->fq_error; | ||
| 130 : | rc->fq_error -= data->quant; | ||
| 131 : | } else { | ||
| 132 : | data->quant = 2; | ||
| 133 : | } | ||
| 134 : | } | ||
| 135 : | return(0); | ||
| 136 : | suxen_drol | 938 | } |
| 137 : | |||
| 138 : | |||
| 139 : | static int rc_2pass1_after(rc_2pass1_t * rc, xvid_plg_data_t * data) | ||
| 140 : | { | ||
| 141 : | char type; | ||
| 142 : | edgomez | 1278 | xvid_enc_stats_t *stats = &data->stats; |
| 143 : | suxen_drol | 938 | |
| 144 : | /* Frame type in ascii I/P/B */ | ||
| 145 : | edgomez | 1278 | switch(stats->type) { |
| 146 : | suxen_drol | 938 | case XVID_TYPE_IVOP: |
| 147 : | type = 'i'; | ||
| 148 : | break; | ||
| 149 : | case XVID_TYPE_PVOP: | ||
| 150 : | type = 'p'; | ||
| 151 : | break; | ||
| 152 : | case XVID_TYPE_BVOP: | ||
| 153 : | type = 'b'; | ||
| 154 : | break; | ||
| 155 : | case XVID_TYPE_SVOP: | ||
| 156 : | type = 's'; | ||
| 157 : | break; | ||
| 158 : | default: /* Should not go here */ | ||
| 159 : | return(XVID_ERR_FAIL); | ||
| 160 : | } | ||
| 161 : | |||
| 162 : | /* write the resulting statistics */ | ||
| 163 : | |||
| 164 : | edgomez | 1278 | fprintf(rc->stat_file, "%c %d %d %d %d %d %d\n", |
| 165 : | type, | ||
| 166 : | stats->quant, | ||
| 167 : | stats->kblks, | ||
| 168 : | stats->mblks, | ||
| 169 : | stats->ublks, | ||
| 170 : | stats->length, | ||
| 171 : | stats->hlength); | ||
| 172 : | suxen_drol | 938 | |
| 173 : | return(0); | ||
| 174 : | } | ||
| 175 : | |||
| 176 : | |||
| 177 : | |||
| 178 : | int xvid_plugin_2pass1(void * handle, int opt, void * param1, void * param2) | ||
| 179 : | { | ||
| 180 : | switch(opt) | ||
| 181 : | { | ||
| 182 : | case XVID_PLG_INFO : | ||
| 183 : | syskin | 1216 | case XVID_PLG_FRAME : |
| 184 : | suxen_drol | 938 | return 0; |
| 185 : | |||
| 186 : | case XVID_PLG_CREATE : | ||
| 187 : | return rc_2pass1_create((xvid_plg_create_t*)param1, param2); | ||
| 188 : | |||
| 189 : | case XVID_PLG_DESTROY : | ||
| 190 : | return rc_2pass1_destroy((rc_2pass1_t*)handle, (xvid_plg_destroy_t*)param1); | ||
| 191 : | |||
| 192 : | case XVID_PLG_BEFORE : | ||
| 193 : | return rc_2pass1_before((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1); | ||
| 194 : | |||
| 195 : | case XVID_PLG_AFTER : | ||
| 196 : | return rc_2pass1_after((rc_2pass1_t*)handle, (xvid_plg_data_t*)param1); | ||
| 197 : | } | ||
| 198 : | |||
| 199 : | return XVID_ERR_FAIL; | ||
| 200 : | } |
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