* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "framehook.h"
-#include "swscale.h"
+#include "libavformat/framehook.h"
+#include "libswscale/swscale.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <Imlib2.h>
-#include "eval.h"
+#include "libavcodec/eval.h"
const char *const_names[]={
"PI",
Imlib_Font fn;
char *text;
char *file;
- int r, g, b;
+ 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;
+ struct CachedImage *cache;
Imlib_Image imageOverlaid;
AVEvalExpr *eval_x, *eval_y;
char *expr_x, *expr_y;
struct SwsContext *fromRGB_convert_ctx;
} ContextInfo;
-typedef struct _CachedImage {
- struct _CachedImage *next;
+typedef struct CachedImage {
+ struct CachedImage *next;
Imlib_Image image;
int width;
int height;
imlib_context_set_image(ci->imageOverlaid);
imlib_free_image();
}
- ff_eval_free(ci->expr_x);
- ff_eval_free(ci->expr_y);
+ 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 c;
ContextInfo *ci;
+ char *rgbtxt = 0;
char *font = "LucidaSansDemiBold/16";
char *fp = getenv("FONTPATH");
char *color = 0;
FILE *f;
char *p;
+ char *error;
*ctxp = av_mallocz(sizeof(ContextInfo));
ci = (ContextInfo *) *ctxp;
ci->expr_x = "0.0";
ci->expr_y = "0.0";
- optind = 0;
+ optind = 1;
/* Use ':' to split FONTPATH */
if (fp)
imlib_add_path_to_font_path(fp);
- while ((c = getopt(argc, argv, "c:f:F:t:x:y:i:")) > 0) {
+ 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;
ci->fileImage = av_strdup(optarg);
break;
case '?':
- fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
+ av_log(NULL, AV_LOG_ERROR, "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);
+ 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;
}
- imlib_context_set_font(ci->fn);
- imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT);
+
+ 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;
- f = fopen("/usr/share/X11/rgb.txt", "r");
- if (!f)
- f = fopen("/usr/lib/X11/rgb.txt", "r");
+ 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) {
- fprintf(stderr, "Failed to find rgb.txt\n");
+ av_log(NULL, AV_LOG_ERROR, "Failed to find RGB color names file\n");
return -1;
}
while (fgets(buff, sizeof(buff), f)) {
}
fclose(f);
if (!done) {
- fprintf(stderr, "Unable to find color '%s' in rgb.txt\n", color);
+ 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;
}
}
- imlib_context_set_color(ci->r, ci->g, ci->b, 255);
+
+ 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_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);
+ 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, NULL))){
- av_log(NULL, AV_LOG_ERROR, "Couldn't parse y expression '%s'\n", ci->expr_y);
+ 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;
}
imlib_context_set_image(image);
data = imlib_image_get_data();
- avpicture_fill(&picture1, (uint8_t *) data, PIX_FMT_RGB32, width, height);
+ 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,
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');
projects / ffmpeg / blobdiff