diff options
| author | Chris Robinson <[email protected]> | 2013-05-21 05:33:54 -0700 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2013-05-21 05:33:54 -0700 |
| commit | 3ee0f8feb9a011eca3a76848f1ffb139c592f7b4 (patch) | |
| tree | f42c7d34aad2fd7696bee863347010de80c1dd57 /Alc/alcEqualizer.c | |
| parent | 5c8c40afefc4e42635da91a876232cfc0975f6fd (diff) | |
Avoid storing the device frequency in the equalizer
Diffstat (limited to 'Alc/alcEqualizer.c')
| -rw-r--r-- | Alc/alcEqualizer.c | 37 |
1 files changed, 19 insertions, 18 deletions
diff --git a/Alc/alcEqualizer.c b/Alc/alcEqualizer.c index 6bc4ed12..318593ee 100644 --- a/Alc/alcEqualizer.c +++ b/Alc/alcEqualizer.c @@ -92,7 +92,6 @@ typedef struct ALequalizerState { /* Effect parameters */ ALEQFilter bandfilter[4]; - ALfloat frequency; } ALequalizerState; static ALvoid ALequalizerState_Destroy(ALequalizerState *state) @@ -100,22 +99,24 @@ static ALvoid ALequalizerState_Destroy(ALequalizerState *state) free(state); } -static ALboolean ALequalizerState_DeviceUpdate(ALequalizerState *state, ALCdevice *Device) +static ALboolean ALequalizerState_DeviceUpdate(ALequalizerState *state, ALCdevice *device) { - state->frequency = (ALfloat)Device->Frequency; return AL_TRUE; + (void)state; + (void)device; } -static ALvoid ALequalizerState_Update(ALequalizerState *state, ALCdevice *Device, const ALeffectslot *Slot) +static ALvoid ALequalizerState_Update(ALequalizerState *state, ALCdevice *device, const ALeffectslot *slot) { - ALfloat gain = sqrtf(1.0f / Device->NumChan) * Slot->Gain; + ALfloat frequency = (ALfloat)device->Frequency; + ALfloat gain = sqrtf(1.0f / device->NumChan) * slot->Gain; ALuint it; for(it = 0;it < MaxChannels;it++) state->Gain[it] = 0.0f; - for(it = 0; it < Device->NumChan; it++) + for(it = 0; it < device->NumChan; it++) { - enum Channel chan = Device->Speaker2Chan[it]; + enum Channel chan = device->Speaker2Chan[it]; state->Gain[chan] = gain; } @@ -132,26 +133,26 @@ static ALvoid ALequalizerState_Update(ALequalizerState *state, ALCdevice *Device switch (it) { case 0: /* Low Shelf */ - gain = powf(10.0f, (20.0f * log10f(Slot->effect.Equalizer.LowGain)) / 40.0f); - filter_frequency = Slot->effect.Equalizer.LowCutoff; + gain = powf(10.0f, (20.0f * log10f(slot->effect.Equalizer.LowGain)) / 40.0f); + filter_frequency = slot->effect.Equalizer.LowCutoff; break; case 1: /* Peaking */ - gain = powf(10.0f, (20.0f * log10f(Slot->effect.Equalizer.Mid1Gain)) / 40.0f); - filter_frequency = Slot->effect.Equalizer.Mid1Center; - bandwidth = Slot->effect.Equalizer.Mid1Width; + gain = powf(10.0f, (20.0f * log10f(slot->effect.Equalizer.Mid1Gain)) / 40.0f); + filter_frequency = slot->effect.Equalizer.Mid1Center; + bandwidth = slot->effect.Equalizer.Mid1Width; break; case 2: /* Peaking */ - gain = powf(10.0f, (20.0f * log10f(Slot->effect.Equalizer.Mid2Gain)) / 40.0f); - filter_frequency = Slot->effect.Equalizer.Mid2Center; - bandwidth = Slot->effect.Equalizer.Mid2Width; + gain = powf(10.0f, (20.0f * log10f(slot->effect.Equalizer.Mid2Gain)) / 40.0f); + filter_frequency = slot->effect.Equalizer.Mid2Center; + bandwidth = slot->effect.Equalizer.Mid2Width; break; case 3: /* High Shelf */ - gain = powf(10.0f, (20.0f * log10f(Slot->effect.Equalizer.HighGain)) / 40.0f); - filter_frequency = Slot->effect.Equalizer.HighCutoff; + gain = powf(10.0f, (20.0f * log10f(slot->effect.Equalizer.HighGain)) / 40.0f); + filter_frequency = slot->effect.Equalizer.HighCutoff; break; } - w0 = 2.0f * F_PI * filter_frequency / state->frequency; + w0 = 2.0f*F_PI * filter_frequency / frequency; /* Calculate filter coefficients depending on filter type */ switch(state->bandfilter[it].type) |