diff options
Diffstat (limited to 'audio/filter/af_sub.c')
| -rw-r--r-- | audio/filter/af_sub.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/audio/filter/af_sub.c b/audio/filter/af_sub.c index 7012e1e129..742d2e7413 100644 --- a/audio/filter/af_sub.c +++ b/audio/filter/af_sub.c @@ -41,22 +41,22 @@ // Analog domain biquad section typedef struct{ - float a[3]; // Numerator coefficients - float b[3]; // Denominator coefficients + float a[3]; // Numerator coefficients + float b[3]; // Denominator coefficients } biquad_t; // S-parameters for designing 4th order Butterworth filter static biquad_t sp[2] = {{{1.0,0.0,0.0},{1.0,0.765367,1.0}}, - {{1.0,0.0,0.0},{1.0,1.847759,1.0}}}; + {{1.0,0.0,0.0},{1.0,1.847759,1.0}}}; // Data for specific instances of this filter typedef struct af_sub_s { - float w[2][4]; // Filter taps for low-pass filter - float q[2][2]; // Circular queues - float fc; // Cutoff frequency [Hz] for low-pass filter - float k; // Filter gain; - int ch; // Channel number which to insert the filtered data + float w[2][4]; // Filter taps for low-pass filter + float q[2][2]; // Circular queues + float fc; // Cutoff frequency [Hz] for low-pass filter + float k; // Filter gain; + int ch; // Channel number which to insert the filtered data }af_sub_t; @@ -92,7 +92,7 @@ static int control(struct af_instance* af, int cmd, void* arg) float h0 = (q)[0]; \ float h1 = (q)[1]; \ float hn = (in) - h0 * (w)[0] - h1 * (w)[1]; \ - out = hn + h0 * (w)[2] + h1 * (w)[3]; \ + out = hn + h0 * (w)[2] + h1 * (w)[3]; \ (q)[1] = h0; \ (q)[0] = hn; \ } @@ -101,12 +101,12 @@ static int control(struct af_instance* af, int cmd, void* arg) // Filter data through filter static int filter(struct af_instance* af, struct mp_audio* data, int flags) { - struct mp_audio* c = data; // Current working data - af_sub_t* s = af->priv; // Setup for this instance - float* a = c->planes[0]; // Audio data - int len = c->samples*c->nch; // Number of samples in current audio block - int nch = c->nch; // Number of channels - int ch = s->ch; // Channel in which to insert the sub audio + struct mp_audio* c = data; // Current working data + af_sub_t* s = af->priv; // Setup for this instance + float* a = c->planes[0]; // Audio data + int len = c->samples*c->nch; // Number of samples in current audio block + int nch = c->nch; // Number of channels + int ch = s->ch; // Channel in which to insert the sub audio register int i; // Run filter |