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54 lines
1.8 KiB
54 lines
1.8 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <limits.h> |
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#include <stdio.h> |
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#include "internal.h" |
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#include "lfg.h" |
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#include "lls.h" |
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int main(void) |
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{ |
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LLSModel m; |
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int i, order; |
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AVLFG lfg; |
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av_lfg_init(&lfg, 1); |
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avpriv_init_lls(&m, 3); |
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for (i = 0; i < 100; i++) { |
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LOCAL_ALIGNED(32, double, var, [4]); |
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double eval; |
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var[0] = (av_lfg_get(&lfg) / (double) UINT_MAX - 0.5) * 2; |
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var[1] = var[0] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5; |
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var[2] = var[1] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5; |
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var[3] = var[2] + av_lfg_get(&lfg) / (double) UINT_MAX - 0.5; |
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m.update_lls(&m, var); |
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avpriv_solve_lls(&m, 0.001, 0); |
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for (order = 0; order < 3; order++) { |
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eval = m.evaluate_lls(&m, var + 1, order); |
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printf("real:%9f order:%d pred:%9f var:%f coeffs:%f %9f %9f\n", |
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var[0], order, eval, sqrt(m.variance[order] / (i + 1)), |
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m.coeff[order][0], m.coeff[order][1], |
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m.coeff[order][2]); |
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} |
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} |
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return 0; |
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}
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