/* * imlib2 based hook * Copyright (c) 2002 Philip Gladstone * * This module implements a text overlay for a video image. Currently it * supports a fixed overlay or reading the text from a file. The string * is passed through strftime so that it is easy to imprint the date and * time onto the image. * * Options: * * -c <color> The color of the text * -F <fontname> The font face and size * -t <text> The text * -f <filename> The filename to read text from * -x <num> X coordinate to start text * -y <num> Y coordinate to start text * * This module is very much intended as an example of what could be done. * For example, you could overlay an image (even semi-transparent) like * TV stations do. You can manipulate the image using imlib2 functions * in any way. * * One caution is that this is an expensive process -- in particular the * conversion of the image into RGB and back is time consuming. For some * special cases -- e.g. painting black text -- it would be faster to paint * the text into a bitmap and then combine it directly into the YUV * image. However, this code is fast enough to handle 10 fps of 320x240 on a * 900MHz Duron in maybe 15% of the CPU. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "framehook.h" #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <stdarg.h> #include <string.h> #include <unistd.h> #undef time #include <sys/time.h> #include <time.h> #include <X11/Xlib.h> #include <Imlib2.h> typedef struct { int dummy; Imlib_Font fn; char *text; char *file; int r, g, b; int x; int y; struct _CachedImage *cache; } ContextInfo; typedef struct _CachedImage { struct _CachedImage *next; Imlib_Image image; int width; int height; } CachedImage; void Release(void *ctx) { ContextInfo *ci; ci = (ContextInfo *) ctx; if (ci->cache) { imlib_context_set_image(ci->cache->image); imlib_free_image(); av_free(ci->cache); } if (ctx) av_free(ctx); } int Configure(void **ctxp, int argc, char *argv[]) { int c; ContextInfo *ci; char *font = "LucidaSansDemiBold/16"; char *fp = getenv("FONTPATH"); char *color = 0; FILE *f; *ctxp = av_mallocz(sizeof(ContextInfo)); ci = (ContextInfo *) *ctxp; optind = 0; if (fp) imlib_add_path_to_font_path(fp); while ((c = getopt(argc, argv, "c:f:F:t:x:y:")) > 0) { switch (c) { case 'c': color = optarg; break; case 'F': font = optarg; break; case 't': ci->text = av_strdup(optarg); break; case 'f': ci->file = av_strdup(optarg); break; case 'x': ci->x = atoi(optarg); break; case 'y': ci->y = atoi(optarg); break; case '?': fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]); return -1; } } ci->fn = imlib_load_font(font); if (!ci->fn) { fprintf(stderr, "Failed to load font '%s'\n", font); return -1; } imlib_context_set_font(ci->fn); imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT); if (color) { char buff[256]; int done = 0; f = fopen("/usr/lib/X11/rgb.txt", "r"); if (!f) { fprintf(stderr, "Failed to find rgb.txt\n"); return -1; } while (fgets(buff, sizeof(buff), f)) { int r, g, b; char colname[80]; if (sscanf(buff, "%d %d %d %64s", &r, &g, &b, colname) == 4 && strcasecmp(colname, color) == 0) { ci->r = r; ci->g = g; ci->b = b; /* fprintf(stderr, "%s -> %d,%d,%d\n", colname, r, g, b); */ done = 1; break; } } fclose(f); if (!done) { fprintf(stderr, "Unable to find color '%s' in rgb.txt\n", color); return -1; } } imlib_context_set_color(ci->r, ci->g, ci->b, 255); return 0; } static Imlib_Image get_cached_image(ContextInfo *ci, int width, int height) { CachedImage *cache; for (cache = ci->cache; cache; cache = cache->next) { if (width == cache->width && height == cache->height) return cache->image; } return NULL; } static void put_cached_image(ContextInfo *ci, Imlib_Image image, int width, int height) { CachedImage *cache = av_mallocz(sizeof(*cache)); cache->image = image; cache->width = width; cache->height = height; cache->next = ci->cache; ci->cache = cache; } void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts) { ContextInfo *ci = (ContextInfo *) ctx; AVPicture picture1; Imlib_Image image; DATA32 *data; image = get_cached_image(ci, width, height); if (!image) { image = imlib_create_image(width, height); put_cached_image(ci, image, width, height); } imlib_context_set_image(image); data = imlib_image_get_data(); avpicture_fill(&picture1, (uint8_t *) data, PIX_FMT_RGBA32, width, height); if (pix_fmt != PIX_FMT_RGBA32) { if (img_convert(&picture1, PIX_FMT_RGBA32, picture, pix_fmt, width, height) < 0) { goto done; } } else { img_copy(&picture1, picture, PIX_FMT_RGBA32, width, height); } imlib_image_set_has_alpha(0); { int wid, hig, h_a, v_a; char buff[1000]; char tbuff[1000]; char *tbp = ci->text; time_t now = time(0); char *p, *q; int x, y; if (ci->file) { int fd = open(ci->file, O_RDONLY); if (fd < 0) { tbp = "[File not found]"; } else { int l = read(fd, tbuff, sizeof(tbuff) - 1); if (l >= 0) { tbuff[l] = 0; tbp = tbuff; } else { tbp = "[I/O Error]"; } close(fd); } } strftime(buff, sizeof(buff), tbp ? tbp : "[No data]", localtime(&now)); x = ci->x; y = ci->y; for (p = buff; p; p = q) { q = strchr(p, '\n'); if (q) *q++ = 0; imlib_text_draw_with_return_metrics(x, y, p, &wid, &hig, &h_a, &v_a); y += v_a; } } if (pix_fmt != PIX_FMT_RGBA32) { if (img_convert(picture, pix_fmt, &picture1, PIX_FMT_RGBA32, width, height) < 0) { } } else { img_copy(picture, &picture1, PIX_FMT_RGBA32, width, height); } done: ; }