diff options
Diffstat (limited to 'contrib/ffmpeg/vhook/imlib2.c')
| -rw-r--r-- | contrib/ffmpeg/vhook/imlib2.c | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/contrib/ffmpeg/vhook/imlib2.c b/contrib/ffmpeg/vhook/imlib2.c new file mode 100644 index 000000000..87c54cf0b --- /dev/null +++ b/contrib/ffmpeg/vhook/imlib2.c @@ -0,0 +1,450 @@ +/* + * 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. + * + * You may also overlay an image (even semi-transparent) like TV stations do. + * You may move either the text or the image around your video to create + * scrolling credits, for example. + * + * Text fonts are being looked for in FONTPATH + * + * 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 <expresion> X coordinate of text or image + * -y <expresion> Y coordinate of text or image + * -i <filename> The filename to read a image from + * + * Expresions are functions of: + * N // frame number (starting at zero) + * H // frame height + * W // frame width + * h // image height + * w // image width + * X // previous x + * Y // previous y + * + + Examples: + + FONTPATH="/cygdrive/c/WINDOWS/Fonts/" + FONTPATH="$FONTPATH:/usr/share/imlib2/data/fonts/" + FONTPATH="$FONTPATH:/usr/X11R6/lib/X11/fonts/TTF/" + export FONTPATH + + ffmpeg -i input.avi -vhook \ + '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' + -acodec copy -sameq output.avi + + ffmpeg -i input.avi -vhook \ + 'vhook/imlib2.dll -c red -F Vera.ttf/20 -x 150+0.5*N -y 70+0.25*N -t Hello' + -acodec copy -sameq output.avi + + * 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 "framehook.h" +#include "swscale.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> +#include "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; + 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->expr_x); + ff_eval_free(ci->expr_y); + 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 *font = "LucidaSansDemiBold/16"; + char *fp = getenv("FONTPATH"); + char *color = 0; + FILE *f; + char *p; + + *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 = 0; + + /* 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, "c:f:F:t:x:y:i:")) > 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->expr_x = av_strdup(optarg); + break; + case 'y': + ci->expr_y = av_strdup(optarg); + break; + case 'i': + ci->fileImage = av_strdup(optarg); + break; + case '?': + fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]); + return -1; + } + } + + if (ci->text || ci->file) { + 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/share/X11/rgb.txt", "r"); + if (!f) + 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); + + /* 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, NULL))){ + av_log(NULL, AV_LOG_ERROR, "Couldn't parse x expression '%s'\n", ci->expr_x); + return -1; + } + + if (!(ci->eval_y = ff_parse(ci->expr_y, const_names, NULL, NULL, NULL, NULL, NULL))){ + av_log(NULL, AV_LOG_ERROR, "Couldn't parse y expression '%s'\n", ci->expr_y); + 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_RGBA32, 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_RGBA32, + sws_flags, NULL, NULL, NULL); + if (ci->toRGB_convert_ctx == NULL) { + av_log(NULL, AV_LOG_ERROR, + "Cannot initialize the toRGB conversion context\n"); + exit(1); + } + +// 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]; + 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->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_RGBA32, + 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"); + exit(1); + } +// 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++; +} + |