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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This program 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 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/scaler.cc
* @brief A class to describe one of FFmpeg's software scalers.
*/
#include <iostream>
#include <cassert>
extern "C" {
#include <libswscale/swscale.h>
}
#include "scaler.h"
using namespace std;
vector<Scaler const *> Scaler::_scalers;
/** @param f FFmpeg id.
* @param m mplayer command line id.
* @param i Our id.
* @param n User-visible name.
*/
Scaler::Scaler (int f, int m, string i, string n)
: _ffmpeg_id (f)
, _mplayer_id (m)
, _id (i)
, _name (n)
{
}
/** @return All available scalers */
vector<Scaler const *>
Scaler::all ()
{
return _scalers;
}
/** Set up the static _scalers vector; must be called before from_*
* methods are used.
*/
void
Scaler::setup_scalers ()
{
_scalers.push_back (new Scaler (SWS_BICUBIC, 2, "bicubic", "Bicubic"));
_scalers.push_back (new Scaler (SWS_X, 3, "x", "X"));
_scalers.push_back (new Scaler (SWS_AREA, 5, "area", "Area"));
_scalers.push_back (new Scaler (SWS_GAUSS, 7, "gauss", "Gaussian"));
_scalers.push_back (new Scaler (SWS_LANCZOS, 9, "lanczos", "Lanczos"));
_scalers.push_back (new Scaler (SWS_SINC, 8, "sinc", "Sinc"));
_scalers.push_back (new Scaler (SWS_SPLINE, 10, "spline", "Spline"));
_scalers.push_back (new Scaler (SWS_BILINEAR, 1, "bilinear", "Bilinear"));
_scalers.push_back (new Scaler (SWS_FAST_BILINEAR, 0, "fastbilinear", "Fast Bilinear"));
}
/** @param id One of our ids.
* @return Corresponding scaler, or 0.
*/
Scaler const *
Scaler::from_id (string id)
{
vector<Scaler const *>::iterator i = _scalers.begin ();
while (i != _scalers.end() && (*i)->id() != id) {
++i;
}
if (i == _scalers.end ()) {
return 0;
}
return *i;
}
/** @param s A scaler from our static list.
* @return Index of the scaler with the list, or -1.
*/
int
Scaler::as_index (Scaler const * s)
{
vector<Scaler*>::size_type i = 0;
while (i < _scalers.size() && _scalers[i] != s) {
++i;
}
if (i == _scalers.size ()) {
return -1;
}
return i;
}
/** @param i An index returned from as_index().
* @return Corresponding scaler.
*/
Scaler const *
Scaler::from_index (int i)
{
assert (i <= int(_scalers.size ()));
return _scalers[i];
}
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