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