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/*
* filter_invert
*
* Copyright (C) Tilmann Bitterberg - June 2002
*
* This file is part of transcode, a video stream processing tool
*
* transcode is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* transcode 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#define MOD_NAME "filter_invert.so"
#define MOD_VERSION "v0.1.4 (2003-10-12)"
#define MOD_CAP "invert the image"
#define MOD_AUTHOR "Tilmann Bitterberg"
#include "transcode.h"
#include "filter.h"
#include "libtc/libtc.h"
#include "libtc/optstr.h"
// basic parameter
typedef struct MyFilterData {
unsigned int start;
unsigned int end;
unsigned int step;
int boolstep;
} MyFilterData;
static MyFilterData *mfd = NULL;
/* should probably honor the other flags too */
/*-------------------------------------------------
*
* single function interface
*
*-------------------------------------------------*/
static void help_optstr(void)
{
tc_log_info(MOD_NAME, "(%s) help\n"
"* Overview\n"
" Invert an image\n"
"* Options\n"
" 'range' apply filter to [start-end]/step frames [0-oo/1]\n"
, MOD_CAP);
}
int tc_filter(frame_list_t *ptr_, char *options)
{
vframe_list_t *ptr = (vframe_list_t *)ptr_;
static vob_t *vob=NULL;
int w;
if(ptr->tag & TC_FILTER_GET_CONFIG) {
char buf[128];
optstr_filter_desc (options, MOD_NAME, MOD_CAP, MOD_VERSION, MOD_AUTHOR, "VRY4O", "1");
tc_snprintf(buf, 128, "%u-%u/%d", mfd->start, mfd->end, mfd->step);
optstr_param (options, "range", "apply filter to [start-end]/step frames",
"%u-%u/%d", buf, "0", "oo", "0", "oo", "1", "oo");
return 0;
}
//----------------------------------
//
// filter init
//
//----------------------------------
if(ptr->tag & TC_FILTER_INIT) {
if((vob = tc_get_vob())==NULL) return(-1);
mfd = tc_malloc (sizeof(MyFilterData));
if(mfd == NULL)
return (-1);
mfd->start=0;
mfd->end=(unsigned int)-1;
mfd->step=1;
if (options != NULL) {
if(verbose) tc_log_info(MOD_NAME, "options=%s", options);
optstr_get (options, "range", "%u-%u/%d", &mfd->start, &mfd->end, &mfd->step);
}
if (verbose > 1) {
tc_log_info (MOD_NAME, " Invert Image Settings:");
tc_log_info (MOD_NAME, " range = %u-%u", mfd->start, mfd->end);
tc_log_info (MOD_NAME, " step = %u", mfd->step);
}
if (options)
if (optstr_lookup (options, "help")) {
help_optstr();
}
if (mfd->start % mfd->step == 0)
mfd->boolstep = 0;
else
mfd->boolstep = 1;
// filter init ok.
if (verbose) tc_log_info (MOD_NAME, "%s %s", MOD_VERSION, MOD_CAP);
return(0);
}
//----------------------------------
//
// filter close
//
//----------------------------------
if(ptr->tag & TC_FILTER_CLOSE) {
if (mfd) {
free(mfd);
}
mfd=NULL;
return(0);
} /* filter close */
//----------------------------------
//
// filter frame routine
//
//----------------------------------
// tag variable indicates, if we are called before
// transcodes internal video/audo frame processing routines
// or after and determines video/audio context
if((ptr->tag & TC_POST_M_PROCESS) && (ptr->tag & TC_VIDEO) && !(ptr->attributes & TC_FRAME_IS_SKIPPED)) {
char *p = ptr->video_buf;
if (mfd->start <= ptr->id && ptr->id <= mfd->end && ptr->id%mfd->step == mfd->boolstep) {
for (w = 0; w < ptr->video_size; w++, p++)
*p = 255 - *p;
}
}
return(0);
}
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