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SDL for audio conversion

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This commit is contained in:
John Alanbrook
2022-07-05 20:12:48 +00:00
parent 2d4e2e06c2
commit 9f2419a0bc
8 changed files with 102 additions and 40 deletions
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20
source/engine/dsp.c
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@@ -73,10 +73,12 @@ struct wav gen_triangle(float amp, float freq, int sr, int ch)
if (amp > 1) amp = 1;
if (amp < 0) amp = 0;
short *data = (short*)new.data;
for (int i = 0; i < new.frames; i++) {
short val = 2 * abs( (i/new.frames) - floor( (i/new.frames) + 0.5));
for (int j = 0; j < new.ch; j++) {
new.data[i+j] = val;
data[i+j] = val;
}
}
}
@@ -88,12 +90,24 @@ struct wav gen_saw(float amp, float freq, int sr, int ch)
if (amp > 1) amp = 1;
if (amp < 0) amp = 0;
samp = amp*SHRT_MAX;
short samp = amp*SHRT_MAX;
short *data = (short*)new.data;
for (int i = 0; i < new.frames; i++) {
short val = samp * 2 * i/sr - samp;
for (int j = 0; j < new.ch; j++) {
new.data[i+j] = val;
data[i+j] = val;
}
}
}
void make_dsp_filter()
{
}
void dsp_filter(short *in, short *out, int samples, struct dsp_delay *d)
{
}