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56 lines
1.6 KiB
56 lines
1.6 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 "libavutil/log.h" |
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#include "libavutil/timer.h" |
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#include "libavutil/lfg.h" |
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int main(void) |
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{ |
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int x = 0; |
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int i, j; |
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AVLFG state; |
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av_lfg_init(&state, 0xdeadbeef); |
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for (j = 0; j < 10000; j++) { |
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START_TIMER |
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for (i = 0; i < 624; i++) |
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x += av_lfg_get(&state); |
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STOP_TIMER("624 calls of av_lfg_get"); |
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} |
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av_log(NULL, AV_LOG_ERROR, "final value:%X\n", x); |
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/* BMG usage example */ |
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{ |
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double mean = 1000; |
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double stddev = 53; |
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av_lfg_init(&state, 42); |
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for (i = 0; i < 1000; i += 2) { |
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double bmg_out[2]; |
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av_bmg_get(&state, bmg_out); |
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av_log(NULL, AV_LOG_INFO, |
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"%f\n%f\n", |
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bmg_out[0] * stddev + mean, |
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bmg_out[1] * stddev + mean); |
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} |
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} |
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return 0; |
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}
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