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Read config in EQ.

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This commit is contained in:
Themaister 2014-05-28 00:30:03 +02:00
parent 95d1582f3c
commit 902c92acfc
1 changed files with 39 additions and 19 deletions
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58
audio/filters/eq.c
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@ -24,6 +24,10 @@
#define M_PI 3.1415926535897932384626433832795
#endif
#ifndef min
#define min(a, b) ((a) < (b) ? (a) : (b))
#endif
struct eq_data
{
rarch_fft_t *fft;
@ -167,6 +171,7 @@ static void generate_response(rarch_fft_complex_t *response,
}
float lerp = 0.5f;
// Edge case where i == samples.
if (end_freq > start_freq)
lerp = (freq - start_freq) / (end_freq - start_freq);
float gain = (1.0f - lerp) * start_gain + lerp * end_gain;
@ -223,6 +228,7 @@ static void create_filter(struct eq_data *eq, unsigned size_log2,
if (!fft || !time_filter)
goto end;
// Make sure bands are in correct order.
qsort(gains, num_gains, sizeof(*gains), gains_cmp);
// Compute desired filter response.
@ -251,7 +257,7 @@ static void create_filter(struct eq_data *eq, unsigned size_log2,
}
// Debugging.
#if 1
#if 0
FILE *file = fopen("/tmp/test.txt", "w");
if (file)
{
@ -272,13 +278,41 @@ end:
static void *eq_init(const struct dspfilter_info *info,
const struct dspfilter_config *config, void *userdata)
{
unsigned i;
struct eq_data *eq = (struct eq_data*)calloc(1, sizeof(*eq));
if (!eq)
return NULL;
unsigned size_log2 = 8;
const float default_freq[] = { 0.0f, info->input_rate };
const float default_gain[] = { 0.0f, 0.0f };
float beta;
config->get_float(userdata, "window_beta", &beta, 4.0f);
int size_log2;
config->get_int(userdata, "block_size_log2", &size_log2, 8);
unsigned size = 1 << size_log2;
struct eq_gain *gains = NULL;
float *frequencies, *gain;
unsigned num_freq, num_gain;
config->get_float_array(userdata, "frequencies", &frequencies, &num_freq, default_freq, 2);
config->get_float_array(userdata, "gains", &gain, &num_gain, default_gain, 2);
num_gain = num_freq = min(num_gain, num_freq);
gains = (struct eq_gain*)calloc(num_gain, sizeof(*gains));
if (!gains)
goto error;
for (i = 0; i < num_gain; i++)
{
gains[i].freq = 0.5f * frequencies[i] / info->input_rate;
gains[i].gain = pow(10.0, gain[i] / 20.0);
}
config->free(frequencies);
config->free(gain);
eq->block_size = size;
eq->save = (float*)calloc( size, 2 * sizeof(*eq->save));
@ -293,27 +327,13 @@ static void *eq_init(const struct dspfilter_info *info,
if (!eq->fft || !eq->fftblock || !eq->save || !eq->block || !eq->filter)
goto error;
//struct eq_gain *gains = NULL;
//unsigned num_gains = 0;
struct eq_gain gains[] = {
{ 0.00f, 2.0f },
{ 0.04f, 1.0f },
{ 0.05f, 0.4f },
{ 0.06f, 1.0f },
{ 0.08f, 0.1f },
{ 0.15f, 0.1f },
{ 0.3f, 3.0f },
{ 0.5f, 0.25f },
{ 0.7f, 2.0f },
};
unsigned num_gains = sizeof(gains) / sizeof(gains[0]);
double beta = 5.0;
create_filter(eq, size_log2, gains, num_gains, beta);
create_filter(eq, size_log2, gains, num_gain, beta);
free(gains);
return eq;
error:
free(gains);
eq_free(eq);
return NULL;
}