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dump_movie.cpp
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Fri, Sep 6, 23:23

dump_movie.cpp
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
Contributing author: Axel Kohlmeyer (Temple U)
------------------------------------------------------------------------- */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dump_movie.h"
#include "comm.h"
#include "force.h"
#include "memory.h"
#include "error.h"
using namespace LAMMPS_NS;
/* ---------------------------------------------------------------------- */
DumpMovie::DumpMovie(LAMMPS *lmp, int narg, char **arg) :
DumpImage(lmp, narg, arg)
{
if (multiproc || compressed || multifile)
error->all(FLERR,"Invalid dump movie filename");
filetype = PPM;
bitrate = 2000;
framerate = 24;
fp = NULL;
}
/* ---------------------------------------------------------------------- */
void DumpMovie::openfile()
{
char moviecmd[1024];
if ((comm->me == 0) && (fp == NULL)) {
#ifdef LAMMPS_FFMPEG
sprintf(moviecmd,"ffmpeg -v error -y -r %.2f -f image2pipe -c:v ppm -i - "
"-r 24.0 -b:v %dk %s ", framerate, bitrate, filename);
#else
error->one(FLERR,"Support for writing movies not included");
#endif
#if defined(_WIN32)
fp = _popen(moviecmd,"wb");
#else
fp = popen(moviecmd,"w");
#endif
if (fp == NULL) {
char str[128];
sprintf(str,"Failed to open FFmpeg pipeline to file %s",filename);
error->one(FLERR,str);
}
}
}
/* ---------------------------------------------------------------------- */
void DumpMovie::init_style()
{
// initialize image style circumventing multifile check
multifile = 1;
DumpImage::init_style();
multifile = 0;
}
/* ---------------------------------------------------------------------- */
int DumpMovie::modify_param(int narg, char **arg)
{
int n = DumpImage::modify_param(narg,arg);
if (n) return n;
if (strcmp(arg[0],"bitrate") == 0) {
if (narg < 2) error->all(FLERR,"Illegal dump_modify command");
bitrate = force->inumeric(FLERR,arg[1]);
if (bitrate <= 0.0) error->all(FLERR,"Illegal dump_modify command");
return 2;
}
if (strcmp(arg[0],"framerate") == 0) {
if (narg < 2) error->all(FLERR,"Illegal dump_modify command");
framerate = force->numeric(FLERR,arg[1]);
if ((framerate <= 0.1) || (framerate > 24.0))
error->all(FLERR,"Illegal dump_modify framerate command");
return 2;
}
return 0;
}

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