| /* |
| * imlib2 based hook |
| * Copyright (c) 2002 Philip Gladstone |
| * |
| * This module is very much intended as an example of what could be done. |
| * |
| * 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. |
| |
| * See further statistics on Pentium4, 3GHz, FFMpeg is SVN-r6798 |
| * Input movie is 20.2 seconds of PAL DV on AVI |
| * Output movie is DVD compliant VOB. |
| * |
| ffmpeg -i input.avi -target pal-dvd out.vob |
| # 13.516s just transcode |
| ffmpeg -i input.avi -vhook /usr/local/bin/vhook/null.dll -target pal-dvd out.vob |
| # 23.546s transcode and img_convert |
| ffmpeg -i input.avi -vhook \ |
| 'vhook/imlib2.dll -c red -F Vera/20 -x 150-0.5*N -y 70+0.25*N -t Hello_person' \ |
| -target pal-dvd out.vob |
| # 21.454s transcode, img_convert and move text around |
| ffmpeg -i input.avi -vhook \ |
| 'vhook/imlib2.dll -x 150-0.5*N -y 70+0.25*N -i /usr/share/imlib2/data/images/bulb.png' \ |
| -target pal-dvd out.vob |
| # 20.828s transcode, img_convert and move image around |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavformat/framehook.h" |
| #include "libswscale/swscale.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <fcntl.h> |
| #include <stdarg.h> |
| #include <string.h> |
| #include <strings.h> |
| #include <unistd.h> |
| #undef time |
| #include <sys/time.h> |
| #include <time.h> |
| #include <Imlib2.h> |
| #include "libavcodec/eval.h" |
| |
| const char *const_names[]={ |
| "PI", |
| "E", |
| "N", // frame number (starting at zero) |
| "H", // frame height |
| "W", // frame width |
| "h", // image height |
| "w", // image width |
| "X", // previous x |
| "Y", // previous y |
| NULL |
| }; |
| |
| static int sws_flags = SWS_BICUBIC; |
| |
| typedef struct { |
| int dummy; |
| Imlib_Font fn; |
| char *text; |
| char *file; |
| int r, g, b, a; |
| AVEvalExpr *eval_r, *eval_g, *eval_b, *eval_a; |
| char *expr_R, *expr_G, *expr_B, *expr_A; |
| int eval_colors; |
| double x, y; |
| char *fileImage; |
| struct CachedImage *cache; |
| Imlib_Image imageOverlaid; |
| AVEvalExpr *eval_x, *eval_y; |
| char *expr_x, *expr_y; |
| int frame_number; |
| int imageOverlaid_width, imageOverlaid_height; |
| |
| // This vhook first converts frame to RGB ... |
| struct SwsContext *toRGB_convert_ctx; |
| // ... and then converts back frame from RGB to initial format |
| struct SwsContext *fromRGB_convert_ctx; |
| } 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) { |
| if (ci->imageOverlaid) { |
| imlib_context_set_image(ci->imageOverlaid); |
| imlib_free_image(); |
| } |
| ff_eval_free(ci->eval_x); |
| ff_eval_free(ci->eval_y); |
| ff_eval_free(ci->eval_r); |
| ff_eval_free(ci->eval_g); |
| ff_eval_free(ci->eval_b); |
| ff_eval_free(ci->eval_a); |
| |
| av_free(ci->expr_x); |
| av_free(ci->expr_y); |
| av_free(ci->expr_R); |
| av_free(ci->expr_G); |
| av_free(ci->expr_B); |
| av_free(ci->expr_A); |
| sws_freeContext(ci->toRGB_convert_ctx); |
| sws_freeContext(ci->fromRGB_convert_ctx); |
| av_free(ctx); |
| } |
| } |
| |
| int Configure(void **ctxp, int argc, char *argv[]) |
| { |
| int c; |
| ContextInfo *ci; |
| char *rgbtxt = 0; |
| const char *font = "LucidaSansDemiBold/16"; |
| char *fp = getenv("FONTPATH"); |
| char *color = 0; |
| FILE *f; |
| char *p; |
| const char *error; |
| |
| *ctxp = av_mallocz(sizeof(ContextInfo)); |
| ci = (ContextInfo *) *ctxp; |
| |
| ci->x = 0.0; |
| ci->y = 0.0; |
| ci->expr_x = "0.0"; |
| ci->expr_y = "0.0"; |
| |
| optind = 1; |
| |
| /* Use ':' to split FONTPATH */ |
| if (fp) |
| while ((p = strchr(fp, ':'))) { |
| *p = 0; |
| imlib_add_path_to_font_path(fp); |
| fp = p + 1; |
| } |
| if ((fp) && (*fp)) |
| imlib_add_path_to_font_path(fp); |
| |
| |
| while ((c = getopt(argc, argv, "R:G:B:A:C:c:f:F:t:x:y:i:")) > 0) { |
| switch (c) { |
| case 'R': |
| ci->expr_R = av_strdup(optarg); |
| ci->eval_colors = 1; |
| break; |
| case 'G': |
| ci->expr_G = av_strdup(optarg); |
| ci->eval_colors = 1; |
| break; |
| case 'B': |
| ci->expr_B = av_strdup(optarg); |
| ci->eval_colors = 1; |
| break; |
| case 'A': |
| ci->expr_A = av_strdup(optarg); |
| break; |
| case 'C': |
| rgbtxt = optarg; |
| break; |
| 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->expr_x = av_strdup(optarg); |
| break; |
| case 'y': |
| ci->expr_y = av_strdup(optarg); |
| break; |
| case 'i': |
| ci->fileImage = av_strdup(optarg); |
| break; |
| case '?': |
| av_log(NULL, AV_LOG_ERROR, "Unrecognized argument '%s'\n", argv[optind]); |
| return -1; |
| } |
| } |
| |
| if (ci->eval_colors && !(ci->expr_R && ci->expr_G && ci->expr_B)) |
| { |
| av_log(NULL, AV_LOG_ERROR, "You must specify expressions for all or no colors.\n"); |
| return -1; |
| } |
| |
| if (ci->text || ci->file) { |
| ci->fn = imlib_load_font(font); |
| if (!ci->fn) { |
| av_log(NULL, AV_LOG_ERROR, "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; |
| |
| if (ci->eval_colors) |
| { |
| av_log(NULL, AV_LOG_ERROR, "You must not specify both a color name and expressions for the colors.\n"); |
| return -1; |
| } |
| |
| if (rgbtxt) |
| f = fopen(rgbtxt, "r"); |
| else |
| { |
| f = fopen("/usr/share/X11/rgb.txt", "r"); |
| if (!f) |
| f = fopen("/usr/lib/X11/rgb.txt", "r"); |
| } |
| if (!f) { |
| av_log(NULL, AV_LOG_ERROR, "Failed to find RGB color names file\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) { |
| av_log(NULL, AV_LOG_ERROR, "Unable to find color '%s' in rgb.txt\n", color); |
| return -1; |
| } |
| } else if (ci->eval_colors) { |
| if (!(ci->eval_r = ff_parse(ci->expr_R, const_names, NULL, NULL, NULL, NULL, &error))){ |
| av_log(NULL, AV_LOG_ERROR, "Couldn't parse R expression '%s': %s\n", ci->expr_R, error); |
| return -1; |
| } |
| if (!(ci->eval_g = ff_parse(ci->expr_G, const_names, NULL, NULL, NULL, NULL, &error))){ |
| av_log(NULL, AV_LOG_ERROR, "Couldn't parse G expression '%s': %s\n", ci->expr_G, error); |
| return -1; |
| } |
| if (!(ci->eval_b = ff_parse(ci->expr_B, const_names, NULL, NULL, NULL, NULL, &error))){ |
| av_log(NULL, AV_LOG_ERROR, "Couldn't parse B expression '%s': %s\n", ci->expr_B, error); |
| return -1; |
| } |
| } |
| |
| if (ci->expr_A) { |
| if (!(ci->eval_a = ff_parse(ci->expr_A, const_names, NULL, NULL, NULL, NULL, &error))){ |
| av_log(NULL, AV_LOG_ERROR, "Couldn't parse A expression '%s': %s\n", ci->expr_A, error); |
| return -1; |
| } |
| } else { |
| ci->a = 255; |
| } |
| |
| if (!(ci->eval_colors || ci->eval_a)) |
| imlib_context_set_color(ci->r, ci->g, ci->b, ci->a); |
| |
| /* load the image (for example, credits for a movie) */ |
| if (ci->fileImage) { |
| ci->imageOverlaid = imlib_load_image_immediately(ci->fileImage); |
| if (!(ci->imageOverlaid)){ |
| av_log(NULL, AV_LOG_ERROR, "Couldn't load image '%s'\n", ci->fileImage); |
| return -1; |
| } |
| imlib_context_set_image(ci->imageOverlaid); |
| ci->imageOverlaid_width = imlib_image_get_width(); |
| ci->imageOverlaid_height = imlib_image_get_height(); |
| } |
| |
| if (!(ci->eval_x = ff_parse(ci->expr_x, const_names, NULL, NULL, NULL, NULL, &error))){ |
| av_log(NULL, AV_LOG_ERROR, "Couldn't parse x expression '%s': %s\n", ci->expr_x, error); |
| return -1; |
| } |
| |
| if (!(ci->eval_y = ff_parse(ci->expr_y, const_names, NULL, NULL, NULL, NULL, &error))){ |
| av_log(NULL, AV_LOG_ERROR, "Couldn't parse y expression '%s': %s\n", ci->expr_y, error); |
| return -1; |
| } |
| |
| 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_RGB32, width, height); |
| |
| // if we already got a SWS context, let's realloc if is not re-useable |
| ci->toRGB_convert_ctx = sws_getCachedContext(ci->toRGB_convert_ctx, |
| width, height, pix_fmt, |
| width, height, PIX_FMT_RGB32, |
| sws_flags, NULL, NULL, NULL); |
| if (ci->toRGB_convert_ctx == NULL) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Cannot initialize the toRGB conversion context\n"); |
| return; |
| } |
| |
| // img_convert parameters are 2 first destination, then 4 source |
| // sws_scale parameters are context, 4 first source, then 2 destination |
| sws_scale(ci->toRGB_convert_ctx, |
| picture->data, picture->linesize, 0, height, |
| picture1.data, picture1.linesize); |
| |
| imlib_image_set_has_alpha(0); |
| |
| { |
| int wid, hig, h_a, v_a; |
| char buff[1000]; |
| char tbuff[1000]; |
| const char *tbp = ci->text; |
| time_t now = time(0); |
| char *p, *q; |
| int y; |
| |
| double const_values[]={ |
| M_PI, |
| M_E, |
| ci->frame_number, // frame number (starting at zero) |
| height, // frame height |
| width, // frame width |
| ci->imageOverlaid_height, // image height |
| ci->imageOverlaid_width, // image width |
| ci->x, // previous x |
| ci->y, // previous y |
| 0 |
| }; |
| |
| 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); |
| } |
| } |
| |
| if (tbp) |
| strftime(buff, sizeof(buff), tbp, localtime(&now)); |
| else if (!(ci->imageOverlaid)) |
| strftime(buff, sizeof(buff), "[No data]", localtime(&now)); |
| |
| ci->x = ff_parse_eval(ci->eval_x, const_values, ci); |
| ci->y = ff_parse_eval(ci->eval_y, const_values, ci); |
| y = ci->y; |
| |
| if (ci->eval_a) { |
| ci->a = ff_parse_eval(ci->eval_a, const_values, ci); |
| } |
| |
| if (ci->eval_colors) { |
| ci->r = ff_parse_eval(ci->eval_r, const_values, ci); |
| ci->g = ff_parse_eval(ci->eval_g, const_values, ci); |
| ci->b = ff_parse_eval(ci->eval_b, const_values, ci); |
| } |
| |
| if (ci->eval_colors || ci->eval_a) { |
| imlib_context_set_color(ci->r, ci->g, ci->b, ci->a); |
| } |
| |
| if (!(ci->imageOverlaid)) |
| for (p = buff; p; p = q) { |
| q = strchr(p, '\n'); |
| if (q) |
| *q++ = 0; |
| |
| imlib_text_draw_with_return_metrics(ci->x, y, p, &wid, &hig, &h_a, &v_a); |
| y += v_a; |
| } |
| |
| if (ci->imageOverlaid) { |
| imlib_context_set_image(image); |
| imlib_blend_image_onto_image(ci->imageOverlaid, 0, |
| 0, 0, ci->imageOverlaid_width, ci->imageOverlaid_height, |
| ci->x, ci->y, ci->imageOverlaid_width, ci->imageOverlaid_height); |
| } |
| |
| } |
| |
| ci->fromRGB_convert_ctx = sws_getCachedContext(ci->fromRGB_convert_ctx, |
| width, height, PIX_FMT_RGB32, |
| width, height, pix_fmt, |
| sws_flags, NULL, NULL, NULL); |
| if (ci->fromRGB_convert_ctx == NULL) { |
| av_log(NULL, AV_LOG_ERROR, |
| "Cannot initialize the fromRGB conversion context\n"); |
| return; |
| } |
| // img_convert parameters are 2 first destination, then 4 source |
| // sws_scale parameters are context, 4 first source, then 2 destination |
| sws_scale(ci->fromRGB_convert_ctx, |
| picture1.data, picture1.linesize, 0, height, |
| picture->data, picture->linesize); |
| |
| ci->frame_number++; |
| } |
| |
