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| @@ -55,17 +55,17 @@ static st_effect_t st_equalizer_effect; · 54 unmodified lines | |||
| 55 | 55 | ||
| 56 | /* Filter parameters */ | 56 | /* Filter parameters */ |
| 57 | typedef struct filterparams { | 57 | typedef struct filterparams { |
| 58 | float rate; // Sample rate | 58 | float rate; /* Sample rate */ |
| 59 | float Q; // Q-factor | 59 | float Q; /* Q-factor */ |
| 60 | float cfreq; // Central frequency (Hz) | 60 | float cfreq; /* Central frequency (Hz) */ |
| 61 | float gain; // Gain (dB) | 61 | float gain; /* Gain (dB) */ |
| 62 | double x[3]; // In where x[2] <=> x[ n - 2 ] | 62 | double x[3]; /* In where x[2] <=> x[ n - 2 ] */ |
| 63 | double y[3]; // Out | 63 | double y[3]; /* Out */ |
| 64 | double b[3]; // From this point, equation constants... | 64 | double b[3]; /* From this point, equation constants... */ |
| 65 | double a[3]; | 65 | double a[3]; |
| 66 | } *equalizer_t; | 66 | } *equalizer_t; |
| 67 | 67 | ||
| 68 | int st_equalizer_getopts(eff_t effp, int n, char **argv) | 68 | static int st_equalizer_getopts(eff_t effp, int n, char **argv) |
| 69 | { | 69 | { |
| 70 | equalizer_t eq = (equalizer_t) effp->priv; | 70 | equalizer_t eq = (equalizer_t) effp->priv; |
| 71 | int i; | 71 | int i; |
| @@ -81,20 +81,20 @@ int st_equalizer_getopts(eff_t effp, int n, char **argv) · 9 unmodified lines | |||
| 81 | sscanf(argv[i++], "%f", &eq->Q); | 81 | sscanf(argv[i++], "%f", &eq->Q); |
| 82 | sscanf(argv[i++], "%f", &eq->gain); | 82 | sscanf(argv[i++], "%f", &eq->gain); |
| 83 | 83 | ||
| 84 | // TODO: Would be nice to validate the params.. | 84 | /* FIXME: Would be nice to validate the params.. */ |
| 85 | 85 | ||
| 86 | return (ST_SUCCESS); | 86 | return (ST_SUCCESS); |
| 87 | } | 87 | } |
| 88 | 88 | ||
| 89 | // Set the filter constants | 89 | /* Set the filter constants */ |
| 90 | int st_equalizer_start(eff_t effp) | 90 | static int st_equalizer_start(eff_t effp) |
| 91 | { | 91 | { |
| 92 | equalizer_t eq = (equalizer_t) effp->priv; | 92 | equalizer_t eq = (equalizer_t) effp->priv; |
| 93 | double w0; | 93 | double w0; |
| 94 | double amp; | 94 | double amp; |
| 95 | double alpha; | 95 | double alpha; |
| 96 | 96 | ||
| 97 | // Sample rate | 97 | /* Sample rate */ |
| 98 | eq->rate = effp->ininfo.rate; | 98 | eq->rate = effp->ininfo.rate; |
| 99 | 99 | ||
| 100 | w0 = 2*M_PI*eq->cfreq/eq->rate; | 100 | w0 = 2*M_PI*eq->cfreq/eq->rate; |
| @@ -109,7 +109,7 @@ int st_equalizer_start(eff_t effp) · 8 unmodified lines | |||
| 109 | st_debug("amp: %f", amp); | 109 | st_debug("amp: %f", amp); |
| 110 | st_debug("alpha: %f", alpha); | 110 | st_debug("alpha: %f", alpha); |
| 111 | 111 | ||
| 112 | // Initialisation | 112 | /* Initialisation */ |
| 113 | eq->b[0] = 1 + alpha*amp; | 113 | eq->b[0] = 1 + alpha*amp; |
| 114 | eq->b[1] = -2*cos(w0); | 114 | eq->b[1] = -2*cos(w0); |
| 115 | eq->b[2] = 1 - alpha*amp; | 115 | eq->b[2] = 1 - alpha*amp; |
| @@ -117,12 +117,12 @@ int st_equalizer_start(eff_t effp) · 1 unmodified line | |||
| 117 | eq->a[1] = -2*cos(w0); | 117 | eq->a[1] = -2*cos(w0); |
| 118 | eq->a[2] = 1 - alpha/amp; | 118 | eq->a[2] = 1 - alpha/amp; |
| 119 | 119 | ||
| 120 | eq->x[0] = 0; // x[n] | 120 | eq->x[0] = 0; /* x[n] */ |
| 121 | eq->x[1] = 0; // x[n-1] | 121 | eq->x[1] = 0; /* x[n-1] */ |
| 122 | eq->x[2] = 0; // x[n-2] | 122 | eq->x[2] = 0; /* x[n-2] */ |
| 123 | eq->y[0] = 0; // y[n] | 123 | eq->y[0] = 0; /* y[n] */ |
| 124 | eq->y[1] = 0; // y[n-1] | 124 | eq->y[1] = 0; /* y[n-1] */ |
| 125 | eq->y[2] = 0; // y[n-2] | 125 | eq->y[2] = 0; /* y[n-2] */ |
| 126 | 126 | ||
| 127 | if (effp->globalinfo.octave_plot_effect) | 127 | if (effp->globalinfo.octave_plot_effect) |
| 128 | { | 128 | { |
| @@ -147,7 +147,7 @@ int st_equalizer_start(eff_t effp) · 18 unmodified lines | |||
| 147 | return (ST_SUCCESS); | 147 | return (ST_SUCCESS); |
| 148 | } | 148 | } |
| 149 | 149 | ||
| 150 | int st_equalizer_flow(eff_t effp, const st_sample_t *ibuf, | 150 | static int st_equalizer_flow(eff_t effp, const st_sample_t *ibuf, |
| 151 | st_sample_t *obuf, st_size_t *isamp, | 151 | st_sample_t *obuf, st_size_t *isamp, |
| 152 | st_size_t *osamp) | 152 | st_size_t *osamp) |
| 153 | { | 153 | { |