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87 lines
3.3 KiB
87 lines
3.3 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 "libavcodec/mpeg12.h" |
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#include "libavcodec/mpeg12data.h" |
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int main(void) |
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{ |
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int i; |
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#define TEST_MATCH(frame_rate, code, ext_n, ext_d) do { \ |
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AVRational fr = frame_rate; \ |
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int c, n, d; \ |
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ff_mpeg12_find_best_frame_rate(fr, &c, &n, &d, 0); \ |
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if (c != code || n != ext_n || d != ext_d) { \ |
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av_log(NULL, AV_LOG_ERROR, "Failed to match %d/%d: " \ |
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"code = %d, ext_n = %d, ext_d = %d.\n", \ |
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fr.num, fr.den, c, n, d); \ |
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return 1; \ |
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} \ |
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} while (0) |
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#define TEST_EXACT(frn, frd) do { \ |
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AVRational fr = (AVRational) { frn, frd }; \ |
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int c, n, d; \ |
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ff_mpeg12_find_best_frame_rate(fr, &c, &n, &d, 0); \ |
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if (av_cmp_q(fr, av_mul_q(ff_mpeg12_frame_rate_tab[c], \ |
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(AVRational) { n + 1, d + 1 })) != 0) { \ |
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av_log(NULL, AV_LOG_ERROR, "Failed to find exact %d/%d: " \ |
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"code = %d, ext_n = %d, ext_d = %d.\n", \ |
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fr.num, fr.den, c, n, d); \ |
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return 1; \ |
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} \ |
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} while (0) |
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// Framerates in the table must be chosen exactly. |
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for (i = 1; i <= 8; i++) |
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TEST_MATCH(ff_mpeg12_frame_rate_tab[i], i, 0, 0); |
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// As should the same ones with small perturbations. |
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// (1/1000 used here to be smaller than half the difference |
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// between 24 and 24000/1001.) |
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for (i = 1; i <= 8; i++) { |
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TEST_MATCH(av_sub_q(ff_mpeg12_frame_rate_tab[i], |
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(AVRational) { 1, 1000 }), i, 0, 0); |
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TEST_MATCH(av_add_q(ff_mpeg12_frame_rate_tab[i], |
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(AVRational) { 1, 1000 }), i, 0, 0); |
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} |
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// Exactly constructable framerates should be exact. Note that some |
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// values can be made in multiple ways (e.g. 12 = 24 / 2 == 60 / 5), |
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// and there is no reason to favour any particular choice. |
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TEST_EXACT( 1, 1); |
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TEST_EXACT( 2, 1); |
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TEST_EXACT( 12, 1); |
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TEST_EXACT( 15000, 1001); |
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TEST_EXACT( 15, 1); |
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TEST_EXACT( 120, 1); |
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TEST_EXACT(120000, 1001); |
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TEST_EXACT( 200, 1); |
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TEST_EXACT( 240, 1); |
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// Values higher than 240 (the highest representable, as 60 * 4 / 1) |
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// should be mapped to 240. |
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for (i = 240; i < 1000; i += 10) |
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TEST_MATCH(((AVRational) { i, 1 }), 8, 3, 0); |
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// Values lower than 24000/32032 (the lowest representable, as |
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// 24000/1001 * 1 / 32) should be mapped to 24000/32032. |
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for (i = 74; i > 0; i--) |
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TEST_MATCH(((AVRational) { i, 100 }), 1, 0, 31); |
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return 0; |
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}
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