1/* 2 * imlib2 based hook 3 * Copyright (c) 2002 Philip Gladstone 4 * 5 * This module is very much intended as an example of what could be done. 6 * 7 * One caution is that this is an expensive process -- in particular the 8 * conversion of the image into RGB and back is time consuming. For some 9 * special cases -- e.g. painting black text -- it would be faster to paint 10 * the text into a bitmap and then combine it directly into the YUV 11 * image. However, this code is fast enough to handle 10 fps of 320x240 on a 12 * 900MHz Duron in maybe 15% of the CPU. 13 14 * See further statistics on Pentium4, 3GHz, FFMpeg is SVN-r6798 15 * Input movie is 20.2 seconds of PAL DV on AVI 16 * Output movie is DVD compliant VOB. 17 * 18 ffmpeg -i input.avi -target pal-dvd out.vob 19 # 13.516s just transcode 20 ffmpeg -i input.avi -vhook /usr/local/bin/vhook/null.dll -target pal-dvd out.vob 21 # 23.546s transcode and img_convert 22 ffmpeg -i input.avi -vhook \ 23 'vhook/imlib2.dll -c red -F Vera/20 -x 150-0.5*N -y 70+0.25*N -t Hello_person' \ 24 -target pal-dvd out.vob 25 # 21.454s transcode, img_convert and move text around 26 ffmpeg -i input.avi -vhook \ 27 'vhook/imlib2.dll -x 150-0.5*N -y 70+0.25*N -i /usr/share/imlib2/data/images/bulb.png' \ 28 -target pal-dvd out.vob 29 # 20.828s transcode, img_convert and move image around 30 * 31 * This file is part of FFmpeg. 32 * 33 * FFmpeg is free software; you can redistribute it and/or 34 * modify it under the terms of the GNU Lesser General Public 35 * License as published by the Free Software Foundation; either 36 * version 2.1 of the License, or (at your option) any later version. 37 * 38 * FFmpeg is distributed in the hope that it will be useful, 39 * but WITHOUT ANY WARRANTY; without even the implied warranty of 40 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 41 * Lesser General Public License for more details. 42 * 43 * You should have received a copy of the GNU Lesser General Public 44 * License along with FFmpeg; if not, write to the Free Software 45 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 46 */ 47 48#include "libavformat/framehook.h" 49#include "libswscale/swscale.h" 50 51#include <stdio.h> 52#include <stdlib.h> 53#include <fcntl.h> 54#include <stdarg.h> 55#include <string.h> 56#include <strings.h> 57#include <unistd.h> 58#undef time 59#include <sys/time.h> 60#include <time.h> 61#include <Imlib2.h> 62#include "libavcodec/eval.h" 63 64const char *const_names[]={ 65 "PI", 66 "E", 67 "N", // frame number (starting at zero) 68 "H", // frame height 69 "W", // frame width 70 "h", // image height 71 "w", // image width 72 "X", // previous x 73 "Y", // previous y 74 NULL 75}; 76 77static int sws_flags = SWS_BICUBIC; 78 79typedef struct { 80 int dummy; 81 Imlib_Font fn; 82 char *text; 83 char *file; 84 int r, g, b, a; 85 AVEvalExpr *eval_r, *eval_g, *eval_b, *eval_a; 86 char *expr_R, *expr_G, *expr_B, *expr_A; 87 int eval_colors; 88 double x, y; 89 char *fileImage; 90 struct CachedImage *cache; 91 Imlib_Image imageOverlaid; 92 AVEvalExpr *eval_x, *eval_y; 93 char *expr_x, *expr_y; 94 int frame_number; 95 int imageOverlaid_width, imageOverlaid_height; 96 97 // This vhook first converts frame to RGB ... 98 struct SwsContext *toRGB_convert_ctx; 99 // ... and then converts back frame from RGB to initial format 100 struct SwsContext *fromRGB_convert_ctx; 101} ContextInfo; 102 103typedef struct CachedImage { 104 struct CachedImage *next; 105 Imlib_Image image; 106 int width; 107 int height; 108} CachedImage; 109 110void Release(void *ctx) 111{ 112 ContextInfo *ci; 113 ci = (ContextInfo *) ctx; 114 115 if (ci->cache) { 116 imlib_context_set_image(ci->cache->image); 117 imlib_free_image(); 118 av_free(ci->cache); 119 } 120 if (ctx) { 121 if (ci->imageOverlaid) { 122 imlib_context_set_image(ci->imageOverlaid); 123 imlib_free_image(); 124 } 125 ff_eval_free(ci->eval_x); 126 ff_eval_free(ci->eval_y); 127 ff_eval_free(ci->eval_r); 128 ff_eval_free(ci->eval_g); 129 ff_eval_free(ci->eval_b); 130 ff_eval_free(ci->eval_a); 131 132 av_free(ci->expr_x); 133 av_free(ci->expr_y); 134 av_free(ci->expr_R); 135 av_free(ci->expr_G); 136 av_free(ci->expr_B); 137 av_free(ci->expr_A); 138 sws_freeContext(ci->toRGB_convert_ctx); 139 sws_freeContext(ci->fromRGB_convert_ctx); 140 av_free(ctx); 141 } 142} 143 144int Configure(void **ctxp, int argc, char *argv[]) 145{ 146 int c; 147 ContextInfo *ci; 148 char *rgbtxt = 0; 149 const char *font = "LucidaSansDemiBold/16"; 150 char *fp = getenv("FONTPATH"); 151 char *color = 0; 152 FILE *f; 153 char *p; 154 const char *error; 155 156 *ctxp = av_mallocz(sizeof(ContextInfo)); 157 ci = (ContextInfo *) *ctxp; 158 159 ci->x = 0.0; 160 ci->y = 0.0; 161 ci->expr_x = "0.0"; 162 ci->expr_y = "0.0"; 163 164 optind = 1; 165 166 /* Use ':' to split FONTPATH */ 167 if (fp) 168 while ((p = strchr(fp, ':'))) { 169 *p = 0; 170 imlib_add_path_to_font_path(fp); 171 fp = p + 1; 172 } 173 if ((fp) && (*fp)) 174 imlib_add_path_to_font_path(fp); 175 176 177 while ((c = getopt(argc, argv, "R:G:B:A:C:c:f:F:t:x:y:i:")) > 0) { 178 switch (c) { 179 case 'R': 180 ci->expr_R = av_strdup(optarg); 181 ci->eval_colors = 1; 182 break; 183 case 'G': 184 ci->expr_G = av_strdup(optarg); 185 ci->eval_colors = 1; 186 break; 187 case 'B': 188 ci->expr_B = av_strdup(optarg); 189 ci->eval_colors = 1; 190 break; 191 case 'A': 192 ci->expr_A = av_strdup(optarg); 193 break; 194 case 'C': 195 rgbtxt = optarg; 196 break; 197 case 'c': 198 color = optarg; 199 break; 200 case 'F': 201 font = optarg; 202 break; 203 case 't': 204 ci->text = av_strdup(optarg); 205 break; 206 case 'f': 207 ci->file = av_strdup(optarg); 208 break; 209 case 'x': 210 ci->expr_x = av_strdup(optarg); 211 break; 212 case 'y': 213 ci->expr_y = av_strdup(optarg); 214 break; 215 case 'i': 216 ci->fileImage = av_strdup(optarg); 217 break; 218 case '?': 219 av_log(NULL, AV_LOG_ERROR, "Unrecognized argument '%s'\n", argv[optind]); 220 return -1; 221 } 222 } 223 224 if (ci->eval_colors && !(ci->expr_R && ci->expr_G && ci->expr_B)) 225 { 226 av_log(NULL, AV_LOG_ERROR, "You must specify expressions for all or no colors.\n"); 227 return -1; 228 } 229 230 if (ci->text || ci->file) { 231 ci->fn = imlib_load_font(font); 232 if (!ci->fn) { 233 av_log(NULL, AV_LOG_ERROR, "Failed to load font '%s'\n", font); 234 return -1; 235 } 236 imlib_context_set_font(ci->fn); 237 imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT); 238 } 239 240 if (color) { 241 char buff[256]; 242 int done = 0; 243 244 if (ci->eval_colors) 245 { 246 av_log(NULL, AV_LOG_ERROR, "You must not specify both a color name and expressions for the colors.\n"); 247 return -1; 248 } 249 250 if (rgbtxt) 251 f = fopen(rgbtxt, "r"); 252 else 253 { 254 f = fopen("/usr/share/X11/rgb.txt", "r"); 255 if (!f) 256 f = fopen("/usr/lib/X11/rgb.txt", "r"); 257 } 258 if (!f) { 259 av_log(NULL, AV_LOG_ERROR, "Failed to find RGB color names file\n"); 260 return -1; 261 } 262 while (fgets(buff, sizeof(buff), f)) { 263 int r, g, b; 264 char colname[80]; 265 266 if (sscanf(buff, "%d %d %d %64s", &r, &g, &b, colname) == 4 && 267 strcasecmp(colname, color) == 0) { 268 ci->r = r; 269 ci->g = g; 270 ci->b = b; 271 /* fprintf(stderr, "%s -> %d,%d,%d\n", colname, r, g, b); */ 272 done = 1; 273 break; 274 } 275 } 276 fclose(f); 277 if (!done) { 278 av_log(NULL, AV_LOG_ERROR, "Unable to find color '%s' in rgb.txt\n", color); 279 return -1; 280 } 281 } else if (ci->eval_colors) { 282 if (!(ci->eval_r = ff_parse(ci->expr_R, const_names, NULL, NULL, NULL, NULL, &error))){ 283 av_log(NULL, AV_LOG_ERROR, "Couldn't parse R expression '%s': %s\n", ci->expr_R, error); 284 return -1; 285 } 286 if (!(ci->eval_g = ff_parse(ci->expr_G, const_names, NULL, NULL, NULL, NULL, &error))){ 287 av_log(NULL, AV_LOG_ERROR, "Couldn't parse G expression '%s': %s\n", ci->expr_G, error); 288 return -1; 289 } 290 if (!(ci->eval_b = ff_parse(ci->expr_B, const_names, NULL, NULL, NULL, NULL, &error))){ 291 av_log(NULL, AV_LOG_ERROR, "Couldn't parse B expression '%s': %s\n", ci->expr_B, error); 292 return -1; 293 } 294 } 295 296 if (ci->expr_A) { 297 if (!(ci->eval_a = ff_parse(ci->expr_A, const_names, NULL, NULL, NULL, NULL, &error))){ 298 av_log(NULL, AV_LOG_ERROR, "Couldn't parse A expression '%s': %s\n", ci->expr_A, error); 299 return -1; 300 } 301 } else { 302 ci->a = 255; 303 } 304 305 if (!(ci->eval_colors || ci->eval_a)) 306 imlib_context_set_color(ci->r, ci->g, ci->b, ci->a); 307 308 /* load the image (for example, credits for a movie) */ 309 if (ci->fileImage) { 310 ci->imageOverlaid = imlib_load_image_immediately(ci->fileImage); 311 if (!(ci->imageOverlaid)){ 312 av_log(NULL, AV_LOG_ERROR, "Couldn't load image '%s'\n", ci->fileImage); 313 return -1; 314 } 315 imlib_context_set_image(ci->imageOverlaid); 316 ci->imageOverlaid_width = imlib_image_get_width(); 317 ci->imageOverlaid_height = imlib_image_get_height(); 318 } 319 320 if (!(ci->eval_x = ff_parse(ci->expr_x, const_names, NULL, NULL, NULL, NULL, &error))){ 321 av_log(NULL, AV_LOG_ERROR, "Couldn't parse x expression '%s': %s\n", ci->expr_x, error); 322 return -1; 323 } 324 325 if (!(ci->eval_y = ff_parse(ci->expr_y, const_names, NULL, NULL, NULL, NULL, &error))){ 326 av_log(NULL, AV_LOG_ERROR, "Couldn't parse y expression '%s': %s\n", ci->expr_y, error); 327 return -1; 328 } 329 330 return 0; 331} 332 333static Imlib_Image get_cached_image(ContextInfo *ci, int width, int height) 334{ 335 CachedImage *cache; 336 337 for (cache = ci->cache; cache; cache = cache->next) { 338 if (width == cache->width && height == cache->height) 339 return cache->image; 340 } 341 342 return NULL; 343} 344 345static void put_cached_image(ContextInfo *ci, Imlib_Image image, int width, int height) 346{ 347 CachedImage *cache = av_mallocz(sizeof(*cache)); 348 349 cache->image = image; 350 cache->width = width; 351 cache->height = height; 352 cache->next = ci->cache; 353 ci->cache = cache; 354} 355 356void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts) 357{ 358 ContextInfo *ci = (ContextInfo *) ctx; 359 AVPicture picture1; 360 Imlib_Image image; 361 DATA32 *data; 362 363 image = get_cached_image(ci, width, height); 364 365 if (!image) { 366 image = imlib_create_image(width, height); 367 put_cached_image(ci, image, width, height); 368 } 369 370 imlib_context_set_image(image); 371 data = imlib_image_get_data(); 372 373 avpicture_fill(&picture1, (uint8_t *) data, PIX_FMT_RGB32, width, height); 374 375 // if we already got a SWS context, let's realloc if is not re-useable 376 ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx, 377 width, height, pix_fmt, 378 width, height, PIX_FMT_RGB32, 379 sws_flags, NULL, NULL, NULL); 380 if (ci->toRGB_convert_ctx == NULL) { 381 av_log(NULL, AV_LOG_ERROR, 382 "Cannot initialize the toRGB conversion context\n"); 383 return; 384 } 385 386// img_convert parameters are 2 first destination, then 4 source 387// sws_scale parameters are context, 4 first source, then 2 destination 388 sws_scale(ci->toRGB_convert_ctx, 389 picture->data, picture->linesize, 0, height, 390 picture1.data, picture1.linesize); 391 392 imlib_image_set_has_alpha(0); 393 394 { 395 int wid, hig, h_a, v_a; 396 char buff[1000]; 397 char tbuff[1000]; 398 const char *tbp = ci->text; 399 time_t now = time(0); 400 char *p, *q; 401 int y; 402 403 double const_values[]={ 404 M_PI, 405 M_E, 406 ci->frame_number, // frame number (starting at zero) 407 height, // frame height 408 width, // frame width 409 ci->imageOverlaid_height, // image height 410 ci->imageOverlaid_width, // image width 411 ci->x, // previous x 412 ci->y, // previous y 413 0 414 }; 415 416 if (ci->file) { 417 int fd = open(ci->file, O_RDONLY); 418 419 if (fd < 0) { 420 tbp = "[File not found]"; 421 } else { 422 int l = read(fd, tbuff, sizeof(tbuff) - 1); 423 424 if (l >= 0) { 425 tbuff[l] = 0; 426 tbp = tbuff; 427 } else { 428 tbp = "[I/O Error]"; 429 } 430 close(fd); 431 } 432 } 433 434 if (tbp) 435 strftime(buff, sizeof(buff), tbp, localtime(&now)); 436 else if (!(ci->imageOverlaid)) 437 strftime(buff, sizeof(buff), "[No data]", localtime(&now)); 438 439 ci->x = ff_parse_eval(ci->eval_x, const_values, ci); 440 ci->y = ff_parse_eval(ci->eval_y, const_values, ci); 441 y = ci->y; 442 443 if (ci->eval_a) { 444 ci->a = ff_parse_eval(ci->eval_a, const_values, ci); 445 } 446 447 if (ci->eval_colors) { 448 ci->r = ff_parse_eval(ci->eval_r, const_values, ci); 449 ci->g = ff_parse_eval(ci->eval_g, const_values, ci); 450 ci->b = ff_parse_eval(ci->eval_b, const_values, ci); 451 } 452 453 if (ci->eval_colors || ci->eval_a) { 454 imlib_context_set_color(ci->r, ci->g, ci->b, ci->a); 455 } 456 457 if (!(ci->imageOverlaid)) 458 for (p = buff; p; p = q) { 459 q = strchr(p, '\n'); 460 if (q) 461 *q++ = 0; 462 463 imlib_text_draw_with_return_metrics(ci->x, y, p, &wid, &hig, &h_a, &v_a); 464 y += v_a; 465 } 466 467 if (ci->imageOverlaid) { 468 imlib_context_set_image(image); 469 imlib_blend_image_onto_image(ci->imageOverlaid, 0, 470 0, 0, ci->imageOverlaid_width, ci->imageOverlaid_height, 471 ci->x, ci->y, ci->imageOverlaid_width, ci->imageOverlaid_height); 472 } 473 474 } 475 476 ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx, 477 width, height, PIX_FMT_RGB32, 478 width, height, pix_fmt, 479 sws_flags, NULL, NULL, NULL); 480 if (ci->fromRGB_convert_ctx == NULL) { 481 av_log(NULL, AV_LOG_ERROR, 482 "Cannot initialize the fromRGB conversion context\n"); 483 return; 484 } 485// img_convert parameters are 2 first destination, then 4 source 486// sws_scale parameters are context, 4 first source, then 2 destination 487 sws_scale(ci->fromRGB_convert_ctx, 488 picture1.data, picture1.linesize, 0, height, 489 picture->data, picture->linesize); 490 491 ci->frame_number++; 492} 493 494