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/*
* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
* Copyright (C) 2009 Grigori Goronzy <greg@geekmind.org>
* Copyright (C) 2013 rcombs <rcombs@rcombs.me>
*
* This file is part of libass.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include "../libass/ass.h"
typedef struct image_s {
int width, height, stride;
unsigned char *buffer; // RGB24
} image_t;
ASS_Library *ass_library;
ASS_Renderer *ass_renderer;
void msg_callback(int level, const char *fmt, va_list va, void *data)
{
if (level > 6)
return;
printf("libass: ");
vprintf(fmt, va);
printf("\n");
}
static void init(int frame_w, int frame_h)
{
ass_library = ass_library_init();
if (!ass_library) {
printf("ass_library_init failed!\n");
exit(1);
}
ass_set_message_cb(ass_library, msg_callback, NULL);
ass_renderer = ass_renderer_init(ass_library);
if (!ass_renderer) {
printf("ass_renderer_init failed!\n");
exit(1);
}
ass_set_frame_size(ass_renderer, frame_w, frame_h);
ass_set_fonts(ass_renderer, NULL, "Sans", 1, NULL, 1);
}
int main(int argc, char *argv[])
{
const int frame_w = 1280;
const int frame_h = 720;
if (argc < 5) {
printf("usage: %s <subtitle file> <start time> <fps> <end time>\n", argv[0]);
exit(1);
}
char *subfile = argv[1];
double tm = strtod(argv[2], 0);
double fps = strtod(argv[3], 0);
double end_time = strtod(argv[4], 0);
if (fps == 0) {
printf("fps cannot equal 0\n");
exit(1);
}
init(frame_w, frame_h);
ASS_Track *track = ass_read_file(ass_library, subfile, NULL);
if (!track) {
printf("track init failed!\n");
exit(1);
}
while (tm < end_time) {
ass_render_frame(ass_renderer, track, (int) (tm * 1000), NULL);
tm += 1 / fps;
}
ass_free_track(track);
ass_renderer_done(ass_renderer);
ass_library_done(ass_library);
return 0;
}
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