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CLeanups

This commit is contained in:
twinaphex 2015-09-12 22:27:58 +02:00
parent 4a818c24ea
commit 1fbc83f51e
2 changed files with 17 additions and 15 deletions
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5
audio/audio_filters/eq.c
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@ -119,10 +119,9 @@ static int gains_cmp(const void *a_, const void *b_)
const struct eq_gain *b = (const struct eq_gain*)b_; const struct eq_gain *b = (const struct eq_gain*)b_;
if (a->freq < b->freq) if (a->freq < b->freq)
return -1; return -1;
else if (a->freq > b->freq) if (a->freq > b->freq)
return 1; return 1;
else return 0;
return 0;
} }
static void generate_response(fft_complex_t *response, static void generate_response(fft_complex_t *response,

27
audio/audio_filters/wahwah.c
View File

@ -57,29 +57,32 @@ static void wahwah_process(void *data, struct dspfilter_output *output,
for (i = 0; i < input->frames; i++, out += 2) for (i = 0; i < input->frames; i++, out += 2)
{ {
float out_l, out_r;
float in[2] = { out[0], out[1] }; float in[2] = { out[0], out[1] };
if ((wah->skipcount++ % wahwahlfoskipsamples) == 0) if ((wah->skipcount++ % wahwahlfoskipsamples) == 0)
{ {
float omega, sn, cs, alpha;
float frequency = (1.0 + cos(wah->skipcount * wah->lfoskip + wah->phase)) / 2.0; float frequency = (1.0 + cos(wah->skipcount * wah->lfoskip + wah->phase)) / 2.0;
frequency = frequency * wah->depth * (1.0 - wah->freqofs) + wah->freqofs; frequency = frequency * wah->depth * (1.0 - wah->freqofs) + wah->freqofs;
frequency = exp((frequency - 1.0) * 6.0); frequency = exp((frequency - 1.0) * 6.0);
float omega = M_PI * frequency; omega = M_PI * frequency;
float sn = sin(omega); sn = sin(omega);
float cs = cos(omega); cs = cos(omega);
float alpha = sn / (2.0 * wah->res); alpha = sn / (2.0 * wah->res);
wah->b0 = (1.0 - cs) / 2.0; wah->b0 = (1.0 - cs) / 2.0;
wah->b1 = 1.0 - cs; wah->b1 = 1.0 - cs;
wah->b2 = (1.0 - cs) / 2.0; wah->b2 = (1.0 - cs) / 2.0;
wah->a0 = 1.0 + alpha; wah->a0 = 1.0 + alpha;
wah->a1 = -2.0 * cs; wah->a1 = -2.0 * cs;
wah->a2 = 1.0 - alpha; wah->a2 = 1.0 - alpha;
} }
float out_l = (wah->b0 * in[0] + wah->b1 * wah->l.xn1 + wah->b2 * wah->l.xn2 - wah->a1 * wah->l.yn1 - wah->a2 * wah->l.yn2) / wah->a0; out_l = (wah->b0 * in[0] + wah->b1 * wah->l.xn1 + wah->b2 * wah->l.xn2 - wah->a1 * wah->l.yn1 - wah->a2 * wah->l.yn2) / wah->a0;
float out_r = (wah->b0 * in[1] + wah->b1 * wah->r.xn1 + wah->b2 * wah->r.xn2 - wah->a1 * wah->r.yn1 - wah->a2 * wah->r.yn2) / wah->a0; out_r = (wah->b0 * in[1] + wah->b1 * wah->r.xn1 + wah->b2 * wah->r.xn2 - wah->a1 * wah->r.yn1 - wah->a2 * wah->r.yn2) / wah->a0;
wah->l.xn2 = wah->l.xn1; wah->l.xn2 = wah->l.xn1;
wah->l.xn1 = in[0]; wah->l.xn1 = in[0];