FreeCalypso > hg > freecalypso-tools

annotate ringtools/imy/durations.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents fd4c9bc7835d
children
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fd4c9bc7835d fc-imy2pwt program written, compiles
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1 /*
fd4c9bc7835d fc-imy2pwt program written, compiles
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2 * This module implements the step of precomputing various note durations
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3 * in TDMA frames.
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4 */
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5
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6 extern unsigned beats_per_min;
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7 unsigned tdma_durations[6][4];
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8
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9 static float modifier_values[4] = {1.0f, 1.5f, 1.75f, 2.0f / 3.0f};
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10
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11 compute_note_durations()
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12 {
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13 float beat_ref, basic_ms[6], dur_ms;
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14 unsigned dur_tdma;
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15 int i, j;
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16
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17 beat_ref = 60000.0f / beats_per_min;
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18 basic_ms[0] = beat_ref * 4.0f;
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19 basic_ms[1] = beat_ref * 2.0f;
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20 basic_ms[2] = beat_ref;
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21 basic_ms[3] = beat_ref / 2.0f;
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22 basic_ms[4] = beat_ref / 4.0f;
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23 basic_ms[5] = beat_ref / 8.0f;
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24 for (i = 0; i < 6; i++) {
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25 for (j = 0; j < 4; j++) {
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26 dur_ms = basic_ms[i] * modifier_values[j];
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27 dur_tdma = dur_ms * 13.0f / 60.0f + 0.5f;
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28 tdma_durations[i][j] = dur_tdma;
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29 }
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30 }
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31 }