FreeCalypso > hg > freecalypso-tools
view ringtools/imy/durations.c @ 882:fd4c9bc7835d
fc-imy2pwt program written, compiles
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 03 Apr 2022 03:30:27 +0000 |
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/* * This module implements the step of precomputing various note durations * in TDMA frames. */ extern unsigned beats_per_min; unsigned tdma_durations[6][4]; static float modifier_values[4] = {1.0f, 1.5f, 1.75f, 2.0f / 3.0f}; compute_note_durations() { float beat_ref, basic_ms[6], dur_ms; unsigned dur_tdma; int i, j; beat_ref = 60000.0f / beats_per_min; basic_ms[0] = beat_ref * 4.0f; basic_ms[1] = beat_ref * 2.0f; basic_ms[2] = beat_ref; basic_ms[3] = beat_ref / 2.0f; basic_ms[4] = beat_ref / 4.0f; basic_ms[5] = beat_ref / 8.0f; for (i = 0; i < 6; i++) { for (j = 0; j < 4; j++) { dur_ms = basic_ms[i] * modifier_values[j]; dur_tdma = dur_ms * 13.0f / 60.0f + 0.5f; tdma_durations[i][j] = dur_tdma; } } }