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Implement biquad filter for audio renderer effects

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This commit is contained in:
David Marcec
2020-09-20 14:36:44 +10:00
parent 997d1e2ad9
commit 4008695e4c
3 changed files with 37 additions and 7 deletions
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29
src/audio_core/command_generator.cpp
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@@ -388,18 +388,33 @@ void CommandGenerator::GenerateI3dl2ReverbEffectCommand(s32 mix_buffer_offset, E
void CommandGenerator::GenerateBiquadFilterEffectCommand(s32 mix_buffer_offset, EffectBase* info,
bool enabled) {
if (!enabled) {
return;
}
const auto& params = dynamic_cast<EffectBiquadFilter*>(info)->GetParams();
auto* effect = dynamic_cast<EffectBiquadFilter*>(info);
const auto& params = effect->GetParams();
const auto channel_count = params.channel_count;
for (s32 i = 0; i < channel_count; i++) {
// TODO(ogniK): Actually implement biquad filter
if (params.input[i] != params.output[i]) {
if (!enabled) {
for (s32 i = 0; i < channel_count; i++) {
const auto* input = GetMixBuffer(mix_buffer_offset + params.input[i]);
auto* output = GetMixBuffer(mix_buffer_offset + params.output[i]);
ApplyMix<1>(output, input, 32768, worker_params.sample_count);
}
} else {
const BiquadFilterParameter filter_params{
.enabled = true,
.numerator = params.numerator,
.denominator = params.denominator,
};
auto& states = effect->GetState();
const auto need_init = params.status == ParameterStatus::Initialized ||
params.status == ParameterStatus::Updating;
for (s32 i = 0; i < channel_count; i++) {
if (need_init) {
states[i].fill(0);
}
GenerateBiquadFilterCommand(mix_buffer_offset, filter_params, states[i],
params.input[i], params.output[i],
worker_params.sample_count, 0);
}
}
}