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add moving images feature to imlib2 vhook

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Patch by Victor Paesa % wzrlpy A arsystel P com %
Original thread:
Date: Jul 30, 2006 12:28 AM
Subject: [Ffmpeg-devel] [PATCH] Add moving images feature to imlib2 vhook

Originally committed as revision 6929 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Víctor Paesa 2006-11-07 09:12:20 +00:00 committed by Guillaume Poirier
parent d904b5fc66
commit 718eeb6a21
1 changed files with 154 additions and 14 deletions
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168
vhook/imlib2.c
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@ -7,19 +7,48 @@
* 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 <num> X coordinate to start text
* -y <num> Y coordinate to start text
* -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.
* 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
@ -27,6 +56,23 @@
* 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.
*
@ -59,6 +105,20 @@
#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;
@ -68,9 +128,14 @@ typedef struct {
char *text;
char *file;
int r, g, b;
int x;
int y;
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;
@ -96,6 +161,12 @@ void Release(void *ctx)
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);
@ -110,16 +181,30 @@ int Configure(void **ctxp, int argc, char *argv[])
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:")) > 0) {
while ((c = getopt(argc, argv, "c:f:F:t:x:y:i:")) > 0) {
switch (c) {
case 'c':
color = optarg;
@ -134,10 +219,13 @@ int Configure(void **ctxp, int argc, char *argv[])
ci->file = av_strdup(optarg);
break;
case 'x':
ci->x = atoi(optarg);
ci->expr_x = av_strdup(optarg);
break;
case 'y':
ci->y = atoi(optarg);
ci->expr_y = av_strdup(optarg);
break;
case 'i':
ci->fileImage = av_strdup(optarg);
break;
case '?':
fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
@ -145,6 +233,7 @@ int Configure(void **ctxp, int argc, char *argv[])
}
}
if (ci->text || ci->file) {
ci->fn = imlib_load_font(font);
if (!ci->fn) {
fprintf(stderr, "Failed to load font '%s'\n", font);
@ -152,6 +241,7 @@ int Configure(void **ctxp, int argc, char *argv[])
}
imlib_context_set_font(ci->fn);
imlib_context_set_direction(IMLIB_TEXT_TO_RIGHT);
}
if (color) {
char buff[256];
@ -185,6 +275,29 @@ int Configure(void **ctxp, int argc, char *argv[])
}
}
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;
}
@ -256,7 +369,20 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
char *tbp = ci->text;
time_t now = time(0);
char *p, *q;
int x, y;
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);
@ -276,19 +402,32 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
}
}
strftime(buff, sizeof(buff), tbp ? tbp : "[No data]", localtime(&now));
if (tbp)
strftime(buff, sizeof(buff), tbp, localtime(&now));
else if (!(ci->imageOverlaid))
strftime(buff, sizeof(buff), "[No data]", localtime(&now));
x = ci->x;
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(x, y, p, &wid, &hig, &h_a, &v_a);
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,
@ -306,5 +445,6 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
picture1.data, picture1.linesize, 0, height,
picture->data, picture->linesize);
ci->frame_number++;
}