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| author | gramanas <anastasis.gramm2@gmail.com> | 2023-11-27 01:03:38 +0200 |
|---|---|---|
| committer | gramanas <anastasis.gramm2@gmail.com> | 2023-11-27 01:03:38 +0200 |
| commit | b0128e30840dff1e7db7bcfd69e6fa4f09ed5fbe (patch) | |
| tree | 633be15d0e962db8fd7f2254df7a852f53b85ddc /src/osc.c | |
| parent | fb31c071fe835c5ffd1f70d3558acecee2ed7f17 (diff) | |
| download | synth-project-b0128e30840dff1e7db7bcfd69e6fa4f09ed5fbe.tar.gz synth-project-b0128e30840dff1e7db7bcfd69e6fa4f09ed5fbe.tar.bz2 synth-project-b0128e30840dff1e7db7bcfd69e6fa4f09ed5fbe.zip | |
wavetables
Diffstat (limited to 'src/osc.c')
| -rw-r--r-- | src/osc.c | 10 |
1 files changed, 6 insertions, 4 deletions
@@ -21,17 +21,19 @@ osc_interpolate(float offset, float start, float end) { int osc_next_index(osc_t * osc, float offset) { - if (offset >= osc->len) offset = 0; + if (offset >= osc->len) offset = fmodf(osc->start + offset, osc->len - osc->start); + if (offset < osc->start) offset = osc->start + fmodf(osc->start + offset, osc->len - osc->start); int current_index = (int)offset; - return current_index + 1 >= osc->len ? 0 : current_index + 1; + return current_index + 1 >= osc->len ? osc->start : current_index + 1; } float osc_next_offset(osc_t * osc, float f, float offset) { - if (offset >= osc->len) offset = 0; + if (offset >= osc->len) offset = fmodf(osc->start + offset, osc->len - osc->start); + if (offset < osc->start) offset = osc->start + fmodf(osc->start + offset, osc->len - osc->start); if (osc->type == SAMPLE) { // this makes A2 be the base ??? @@ -40,7 +42,7 @@ osc_next_offset(osc_t * osc, float f, float offset) f = f / (16.35160 * pow(2, (2 + 5 / 12.0))); } - float step = f * ((float)osc->len / SAMPLE_RATE); + float step = f * ((osc->len - osc->start) / (float)SAMPLE_RATE); offset += step; if (offset >= osc->len) { |