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LibDSP: Actually implement the Mastering processor

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This can now handle mute, volume control and panning.
This commit is contained in:
kleines Filmröllchen 2022-07-23 15:40:18 +02:00 • committed by Andreas Kling
parent 281b319588
commit d5166ddbcf
2 changed files with 32 additions and 2 deletions
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26
Userland/Libraries/LibDSP/Effects.cpp
View file

@ -59,12 +59,34 @@ void Delay::process_impl(Signal const& input_signal, Signal& output_signal)
Mastering::Mastering(NonnullRefPtr<Transport> transport)
: EffectProcessor(move(transport))
, m_pan("Pan", -1, 1, 0, Logarithmic::No)
, m_volume("Volume", 0, 1, 1, Logarithmic::No)
, m_muted("Mute", false)
{
m_parameters.append(m_muted);
m_parameters.append(m_volume);
m_parameters.append(m_pan);
}
void Mastering::process_impl([[maybe_unused]] Signal const& input_signal, [[maybe_unused]] Signal& output_signal)
void Mastering::process_impl(Signal const& input_signal, Signal& output)
{
TODO();
process_to_fixed_array(input_signal, output.get<FixedArray<Sample>>());
}
void Mastering::process_to_fixed_array(Signal const& input_signal, FixedArray<Sample>& output)
{
if (m_muted) {
output.fill_with({});
return;
}
auto const& input = input_signal.get<FixedArray<Sample>>();
for (size_t i = 0; i < input.size(); ++i) {
auto sample = input[i];
sample.log_multiply(static_cast<float>(m_volume));
sample.pan(static_cast<float>(m_pan));
output[i] = sample;
}
}
}

8
Userland/Libraries/LibDSP/Effects.h
View file

@ -37,8 +37,16 @@ class Mastering : public EffectProcessor {
public:
Mastering(NonnullRefPtr<Transport>);
// The mastering processor can be used by the track and therefore needs to be able to write to a fixed array directly.
// Otherwise, Track needs to do more unnecessary sample data copies.
void process_to_fixed_array(Signal const&, FixedArray<Sample>&);
private:
virtual void process_impl(Signal const&, Signal&) override;
ProcessorRangeParameter m_pan;
ProcessorRangeParameter m_volume;
ProcessorBooleanParameter m_muted;
};
}