Fix @file in matroskadec.c, it was still matroska.c
[libav.git] / vhook / imlib2.c
CommitLineData
26b4bb70 1/*
115329f1 2 * imlib2 based hook
26b4bb70 3 * Copyright (c) 2002 Philip Gladstone
115329f1 4 *
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5 * This module implements a text overlay for a video image. Currently it
6 * supports a fixed overlay or reading the text from a file. The string
7 * is passed through strftime so that it is easy to imprint the date and
8 * time onto the image.
9 *
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10 * You may also overlay an image (even semi-transparent) like TV stations do.
11 * You may move either the text or the image around your video to create
12 * scrolling credits, for example.
13 *
14 * Text fonts are being looked for in FONTPATH
15 *
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16 * Options:
17 *
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18 * -C <rgb.txt> The filename to read RGB color names from
19 * Defaults if none specified:
20 * /usr/share/X11/rgb.txt
21 * /usr/lib/X11/rgb.txt
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22 * -c <color> The color of the text
23 * -F <fontname> The font face and size
24 * -t <text> The text
25 * -f <filename> The filename to read text from
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26 * -x <expression> X coordinate of text or image
27 * -y <expression> Y coordinate of text or image
718eeb6a 28 * -i <filename> The filename to read a image from
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29 * -R <expression> Value for R color
30 * -G <expression> Value for G color
31 * -B <expression> Value for B color
6f176376 32 * -A <expression> Value for Alpha channel
26b4bb70 33 *
1bebfde9 34 * Expressions are functions of:
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35 * N // frame number (starting at zero)
36 * H // frame height
37 * W // frame width
38 * h // image height
39 * w // image width
40 * X // previous x
41 * Y // previous y
42 *
43
44 Examples:
45
46 FONTPATH="/cygdrive/c/WINDOWS/Fonts/"
47 FONTPATH="$FONTPATH:/usr/share/imlib2/data/fonts/"
48 FONTPATH="$FONTPATH:/usr/X11R6/lib/X11/fonts/TTF/"
49 export FONTPATH
50
51 ffmpeg -i input.avi -vhook \
52 'vhook/imlib2.dll -x W*(0.5+0.25*sin(N/47*PI))-w/2 -y H*(0.5+0.50*cos(N/97*PI))-h/2 -i /usr/share/imlib2/data/images/bulb.png'
53 -acodec copy -sameq output.avi
54
55 ffmpeg -i input.avi -vhook \
56 'vhook/imlib2.dll -c red -F Vera.ttf/20 -x 150+0.5*N -y 70+0.25*N -t Hello'
57 -acodec copy -sameq output.avi
58
26b4bb70 59 * This module is very much intended as an example of what could be done.
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60 *
61 * One caution is that this is an expensive process -- in particular the
62 * conversion of the image into RGB and back is time consuming. For some
63 * special cases -- e.g. painting black text -- it would be faster to paint
64 * the text into a bitmap and then combine it directly into the YUV
115329f1 65 * image. However, this code is fast enough to handle 10 fps of 320x240 on a
26b4bb70 66 * 900MHz Duron in maybe 15% of the CPU.
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67
68 * See further statistics on Pentium4, 3GHz, FFMpeg is SVN-r6798
69 * Input movie is 20.2 seconds of PAL DV on AVI
70 * Output movie is DVD compliant VOB.
71 *
72 ffmpeg -i input.avi -target pal-dvd out.vob
73 # 13.516s just transcode
74 ffmpeg -i input.avi -vhook /usr/local/bin/vhook/null.dll -target pal-dvd out.vob
75 # 23.546s transcode and img_convert
76 ffmpeg -i input.avi -vhook \
77 'vhook/imlib2.dll -c red -F Vera/20 -x 150-0.5*N -y 70+0.25*N -t Hello_person' \
78 -target pal-dvd out.vob
79 # 21.454s transcode, img_convert and move text around
80 ffmpeg -i input.avi -vhook \
81 'vhook/imlib2.dll -x 150-0.5*N -y 70+0.25*N -i /usr/share/imlib2/data/images/bulb.png' \
82 -target pal-dvd out.vob
83 # 20.828s transcode, img_convert and move image around
26b4bb70 84 *
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85 * This file is part of FFmpeg.
86 *
87 * FFmpeg is free software; you can redistribute it and/or
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88 * modify it under the terms of the GNU Lesser General Public
89 * License as published by the Free Software Foundation; either
b78e7197 90 * version 2.1 of the License, or (at your option) any later version.
26b4bb70 91 *
b78e7197 92 * FFmpeg is distributed in the hope that it will be useful,
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93 * but WITHOUT ANY WARRANTY; without even the implied warranty of
94 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
95 * Lesser General Public License for more details.
96 *
97 * You should have received a copy of the GNU Lesser General Public
b78e7197 98 * License along with FFmpeg; if not, write to the Free Software
5509bffa 99 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26b4bb70 100 */
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101
102#include "framehook.h"
67d0436c 103#include "swscale.h"
00a3c8b8 104
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105#include <stdio.h>
106#include <stdlib.h>
107#include <fcntl.h>
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108#include <stdarg.h>
109#include <string.h>
110#include <unistd.h>
00a3c8b8 111#undef time
26b4bb70 112#include <sys/time.h>
00a3c8b8 113#include <time.h>
115329f1 114#include <Imlib2.h>
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115#include "eval.h"
116
117const char *const_names[]={
118 "PI",
119 "E",
120 "N", // frame number (starting at zero)
121 "H", // frame height
122 "W", // frame width
123 "h", // image height
124 "w", // image width
125 "X", // previous x
126 "Y", // previous y
127 NULL
128};
26b4bb70 129
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130static int sws_flags = SWS_BICUBIC;
131
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132typedef struct {
133 int dummy;
134 Imlib_Font fn;
135 char *text;
136 char *file;
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137 int r, g, b, a;
138 AVEvalExpr *eval_r, *eval_g, *eval_b, *eval_a;
139 char *expr_R, *expr_G, *expr_B, *expr_A;
41e4c556 140 int eval_colors;
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141 double x, y;
142 char *fileImage;
26b4bb70 143 struct _CachedImage *cache;
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144 Imlib_Image imageOverlaid;
145 AVEvalExpr *eval_x, *eval_y;
146 char *expr_x, *expr_y;
147 int frame_number;
148 int imageOverlaid_width, imageOverlaid_height;
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149
150 // This vhook first converts frame to RGB ...
151 struct SwsContext *toRGB_convert_ctx;
152 // ... and then converts back frame from RGB to initial format
153 struct SwsContext *fromRGB_convert_ctx;
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154} ContextInfo;
155
156typedef struct _CachedImage {
157 struct _CachedImage *next;
158 Imlib_Image image;
159 int width;
160 int height;
161} CachedImage;
162
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163void Release(void *ctx)
164{
165 ContextInfo *ci;
166 ci = (ContextInfo *) ctx;
167
168 if (ci->cache) {
169 imlib_context_set_image(ci->cache->image);
170 imlib_free_image();
171 av_free(ci->cache);
172 }
67d0436c 173 if (ctx) {
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174 if (ci->imageOverlaid) {
175 imlib_context_set_image(ci->imageOverlaid);
176 imlib_free_image();
177 }
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178 ff_eval_free(ci->eval_x);
179 ff_eval_free(ci->eval_y);
180 ff_eval_free(ci->eval_r);
181 ff_eval_free(ci->eval_g);
182 ff_eval_free(ci->eval_b);
6f176376 183 ff_eval_free(ci->eval_a);
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184
185 av_free(ci->expr_x);
186 av_free(ci->expr_y);
187 av_free(ci->expr_R);
188 av_free(ci->expr_G);
189 av_free(ci->expr_B);
6f176376 190 av_free(ci->expr_A);
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191 sws_freeContext(ci->toRGB_convert_ctx);
192 sws_freeContext(ci->fromRGB_convert_ctx);
6c11d48c 193 av_free(ctx);
67d0436c 194 }
6c11d48c 195}
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196
197int Configure(void **ctxp, int argc, char *argv[])
198{
199 int c;
200 ContextInfo *ci;
6100cb47 201 char *rgbtxt = 0;
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202 char *font = "LucidaSansDemiBold/16";
203 char *fp = getenv("FONTPATH");
204 char *color = 0;
205 FILE *f;
718eeb6a 206 char *p;
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207
208 *ctxp = av_mallocz(sizeof(ContextInfo));
209 ci = (ContextInfo *) *ctxp;
210
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211 ci->x = 0.0;
212 ci->y = 0.0;
213 ci->expr_x = "0.0";
214 ci->expr_y = "0.0";
215
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216 optind = 0;
217
718eeb6a 218 /* Use ':' to split FONTPATH */
26b4bb70 219 if (fp)
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220 while (p = strchr(fp, ':')) {
221 *p = 0;
222 imlib_add_path_to_font_path(fp);
223 fp = p + 1;
224 }
225 if ((fp) && (*fp))
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226 imlib_add_path_to_font_path(fp);
227
718eeb6a 228
6f176376 229 while ((c = getopt(argc, argv, "R:G:B:A:C:c:f:F:t:x:y:i:")) > 0) {
26b4bb70 230 switch (c) {
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231 case 'R':
232 ci->expr_R = av_strdup(optarg);
233 ci->eval_colors = 1;
234 break;
235 case 'G':
236 ci->expr_G = av_strdup(optarg);
237 ci->eval_colors = 1;
238 break;
239 case 'B':
240 ci->expr_B = av_strdup(optarg);
241 ci->eval_colors = 1;
242 break;
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243 case 'A':
244 ci->expr_A = av_strdup(optarg);
245 break;
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246 case 'C':
247 rgbtxt = optarg;
248 break;
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249 case 'c':
250 color = optarg;
251 break;
252 case 'F':
253 font = optarg;
254 break;
255 case 't':
e9a9e0c2 256 ci->text = av_strdup(optarg);
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257 break;
258 case 'f':
e9a9e0c2 259 ci->file = av_strdup(optarg);
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260 break;
261 case 'x':
718eeb6a 262 ci->expr_x = av_strdup(optarg);
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263 break;
264 case 'y':
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265 ci->expr_y = av_strdup(optarg);
266 break;
267 case 'i':
268 ci->fileImage = av_strdup(optarg);
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269 break;
270 case '?':
271 fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
272 return -1;
273 }
274 }
275
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276 if (ci->eval_colors && !(ci->expr_R && ci->expr_G && ci->expr_B))
277 {
278 fprintf(stderr, "You must specify expressions for all or no colors.\n");
279 return -1;
280 }
281
718eeb6a 282 if (ci->text || ci->file) {
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283 ci->fn = imlib_load_font(font);
284 if (!ci->fn) {
285 fprintf(stderr, "Failed to load font '%s'\n", font);
286 return -1;
287 }
288 imlib_context_set_font(ci->fn);
289 imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT);
718eeb6a 290 }
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291
292 if (color) {
293 char buff[256];
294 int done = 0;
295
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296 if (ci->eval_colors)
297 {
298 fprintf(stderr, "You must not specify both a color name and expressions for the colors.\n");
299 return -1;
300 }
301
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302 if (rgbtxt)
303 f = fopen(rgbtxt, "r");
304 else
305 {
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306 f = fopen("/usr/share/X11/rgb.txt", "r");
307 if (!f)
308 f = fopen("/usr/lib/X11/rgb.txt", "r");
6100cb47 309 }
26b4bb70 310 if (!f) {
6100cb47 311 fprintf(stderr, "Failed to find RGB color names file\n");
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312 return -1;
313 }
314 while (fgets(buff, sizeof(buff), f)) {
315 int r, g, b;
316 char colname[80];
317
318 if (sscanf(buff, "%d %d %d %64s", &r, &g, &b, colname) == 4 &&
319 strcasecmp(colname, color) == 0) {
320 ci->r = r;
321 ci->g = g;
322 ci->b = b;
323 /* fprintf(stderr, "%s -> %d,%d,%d\n", colname, r, g, b); */
324 done = 1;
325 break;
326 }
327 }
328 fclose(f);
329 if (!done) {
330 fprintf(stderr, "Unable to find color '%s' in rgb.txt\n", color);
331 return -1;
332 }
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333 } else if (ci->eval_colors) {
334 if (!(ci->eval_r = ff_parse(ci->expr_R, const_names, NULL, NULL, NULL, NULL, NULL))){
335 av_log(NULL, AV_LOG_ERROR, "Couldn't parse R expression '%s'\n", ci->expr_R);
336 return -1;
337 }
338 if (!(ci->eval_g = ff_parse(ci->expr_G, const_names, NULL, NULL, NULL, NULL, NULL))){
339 av_log(NULL, AV_LOG_ERROR, "Couldn't parse G expression '%s'\n", ci->expr_G);
340 return -1;
341 }
342 if (!(ci->eval_b = ff_parse(ci->expr_B, const_names, NULL, NULL, NULL, NULL, NULL))){
343 av_log(NULL, AV_LOG_ERROR, "Couldn't parse B expression '%s'\n", ci->expr_B);
344 return -1;
345 }
26b4bb70 346 }
41e4c556 347
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348 if (ci->expr_A) {
349 if (!(ci->eval_a = ff_parse(ci->expr_A, const_names, NULL, NULL, NULL, NULL, NULL))){
350 av_log(NULL, AV_LOG_ERROR, "Couldn't parse A expression '%s'\n", ci->expr_A);
351 return -1;
352 }
353 } else {
354 ci->a = 255;
355 }
356
357 if (!(ci->eval_colors || ci->eval_a))
358 imlib_context_set_color(ci->r, ci->g, ci->b, ci->a);
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359
360 /* load the image (for example, credits for a movie) */
361 if (ci->fileImage) {
362 ci->imageOverlaid = imlib_load_image_immediately(ci->fileImage);
363 if (!(ci->imageOverlaid)){
364 av_log(NULL, AV_LOG_ERROR, "Couldn't load image '%s'\n", ci->fileImage);
365 return -1;
366 }
367 imlib_context_set_image(ci->imageOverlaid);
368 ci->imageOverlaid_width = imlib_image_get_width();
369 ci->imageOverlaid_height = imlib_image_get_height();
370 }
371
372 if (!(ci->eval_x = ff_parse(ci->expr_x, const_names, NULL, NULL, NULL, NULL, NULL))){
373 av_log(NULL, AV_LOG_ERROR, "Couldn't parse x expression '%s'\n", ci->expr_x);
374 return -1;
375 }
376
377 if (!(ci->eval_y = ff_parse(ci->expr_y, const_names, NULL, NULL, NULL, NULL, NULL))){
378 av_log(NULL, AV_LOG_ERROR, "Couldn't parse y expression '%s'\n", ci->expr_y);
379 return -1;
380 }
381
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382 return 0;
383}
384
385static Imlib_Image get_cached_image(ContextInfo *ci, int width, int height)
386{
387 CachedImage *cache;
388
389 for (cache = ci->cache; cache; cache = cache->next) {
390 if (width == cache->width && height == cache->height)
391 return cache->image;
392 }
393
394 return NULL;
395}
396
397static void put_cached_image(ContextInfo *ci, Imlib_Image image, int width, int height)
398{
399 CachedImage *cache = av_mallocz(sizeof(*cache));
400
401 cache->image = image;
402 cache->width = width;
403 cache->height = height;
404 cache->next = ci->cache;
405 ci->cache = cache;
406}
407
0c1a9eda 408void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
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409{
410 ContextInfo *ci = (ContextInfo *) ctx;
411 AVPicture picture1;
412 Imlib_Image image;
413 DATA32 *data;
414
415 image = get_cached_image(ci, width, height);
416
417 if (!image) {
418 image = imlib_create_image(width, height);
419 put_cached_image(ci, image, width, height);
420 }
421
422 imlib_context_set_image(image);
423 data = imlib_image_get_data();
424
ef4c82cb 425 avpicture_fill(&picture1, (uint8_t *) data, PIX_FMT_RGB32, width, height);
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426
427 // if we already got a SWS context, let's realloc if is not re-useable
428 ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx,
429 width, height, pix_fmt,
71e445fc 430 width, height, PIX_FMT_RGB32,
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431 sws_flags, NULL, NULL, NULL);
432 if (ci->toRGB_convert_ctx == NULL) {
433 av_log(NULL, AV_LOG_ERROR,
434 "Cannot initialize the toRGB conversion context\n");
ca345e44 435 return;
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436 }
437
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438// img_convert parameters are 2 first destination, then 4 source
439// sws_scale parameters are context, 4 first source, then 2 destination
440 sws_scale(ci->toRGB_convert_ctx,
441 picture->data, picture->linesize, 0, height,
442 picture1.data, picture1.linesize);
443
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444 imlib_image_set_has_alpha(0);
445
446 {
115329f1 447 int wid, hig, h_a, v_a;
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448 char buff[1000];
449 char tbuff[1000];
450 char *tbp = ci->text;
451 time_t now = time(0);
452 char *p, *q;
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453 int y;
454
455 double const_values[]={
456 M_PI,
457 M_E,
458 ci->frame_number, // frame number (starting at zero)
459 height, // frame height
460 width, // frame width
461 ci->imageOverlaid_height, // image height
462 ci->imageOverlaid_width, // image width
463 ci->x, // previous x
464 ci->y, // previous y
465 0
466 };
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467
468 if (ci->file) {
469 int fd = open(ci->file, O_RDONLY);
470
471 if (fd < 0) {
472 tbp = "[File not found]";
473 } else {
474 int l = read(fd, tbuff, sizeof(tbuff) - 1);
475
476 if (l >= 0) {
477 tbuff[l] = 0;
478 tbp = tbuff;
479 } else {
480 tbp = "[I/O Error]";
481 }
482 close(fd);
483 }
484 }
485
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486 if (tbp)
487 strftime(buff, sizeof(buff), tbp, localtime(&now));
488 else if (!(ci->imageOverlaid))
489 strftime(buff, sizeof(buff), "[No data]", localtime(&now));
26b4bb70 490
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491 ci->x = ff_parse_eval(ci->eval_x, const_values, ci);
492 ci->y = ff_parse_eval(ci->eval_y, const_values, ci);
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493 y = ci->y;
494
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495 if (ci->eval_a) {
496 ci->a = ff_parse_eval(ci->eval_a, const_values, ci);
497 }
498
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499 if (ci->eval_colors) {
500 ci->r = ff_parse_eval(ci->eval_r, const_values, ci);
501 ci->g = ff_parse_eval(ci->eval_g, const_values, ci);
502 ci->b = ff_parse_eval(ci->eval_b, const_values, ci);
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503 }
504
505 if (ci->eval_colors || ci->eval_a) {
506 imlib_context_set_color(ci->r, ci->g, ci->b, ci->a);
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507 }
508
718eeb6a 509 if (!(ci->imageOverlaid))
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510 for (p = buff; p; p = q) {
511 q = strchr(p, '\n');
512 if (q)
513 *q++ = 0;
514
718eeb6a 515 imlib_text_draw_with_return_metrics(ci->x, y, p, &wid, &hig, &h_a, &v_a);
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516 y += v_a;
517 }
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518
519 if (ci->imageOverlaid) {
520 imlib_context_set_image(image);
521 imlib_blend_image_onto_image(ci->imageOverlaid, 0,
522 0, 0, ci->imageOverlaid_width, ci->imageOverlaid_height,
523 ci->x, ci->y, ci->imageOverlaid_width, ci->imageOverlaid_height);
524 }
525
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526 }
527
67d0436c 528 ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx,
71e445fc 529 width, height, PIX_FMT_RGB32,
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530 width, height, pix_fmt,
531 sws_flags, NULL, NULL, NULL);
532 if (ci->fromRGB_convert_ctx == NULL) {
533 av_log(NULL, AV_LOG_ERROR,
534 "Cannot initialize the fromRGB conversion context\n");
ca345e44 535 return;
26b4bb70 536 }
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537// img_convert parameters are 2 first destination, then 4 source
538// sws_scale parameters are context, 4 first source, then 2 destination
539 sws_scale(ci->fromRGB_convert_ctx,
540 picture1.data, picture1.linesize, 0, height,
541 picture->data, picture->linesize);
26b4bb70 542
718eeb6a 543 ci->frame_number++;
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544}
545