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LibDSP+Piano: Convert DSP APIs to accept entire sample ranges

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This has mainly performance benefits, so that we only need to call into
all processors once for every audio buffer segment. It requires
adjusting quite some logic in most processors and in Track, as we have
to consider a larger collection of notes and samples at each step.

There's some cautionary TODOs in the currently unused LibDSP tracks
because they don't do things properly yet.
This commit is contained in:
kleines Filmröllchen 2022-05-11 23:24:46 +02:00 • committed by Linus Groh
parent 4d65607649
commit 9035d9e845
9 changed files with 123 additions and 75 deletions
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49
Userland/Libraries/LibDSP/Synthesizers.cpp
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@ -31,38 +31,41 @@ Classic::Classic(NonnullRefPtr<Transport> transport)
m_parameters.append(m_release);
}
Signal Classic::process_impl(Signal const& input_signal)
void Classic::process_impl(Signal const& input_signal, [[maybe_unused]] Signal& output_signal)
{
auto& in = input_signal.get<RollNotes>();
auto const& in = input_signal.get<RollNotes>();
auto& output_samples = output_signal.get<FixedArray<Sample>>();
Sample out;
// Do this for every time step and set the signal accordingly.
for (size_t sample_index = 0; sample_index < output_samples.size(); ++sample_index) {
Sample& out = output_samples[sample_index];
u32 sample_time = m_transport->time() + sample_index;
SinglyLinkedList<PitchedEnvelope> playing_envelopes;
SinglyLinkedList<PitchedEnvelope> playing_envelopes;
// "Press" the necessary notes in the internal representation,
// and "release" all of the others
for (u8 i = 0; i < note_frequencies.size(); ++i) {
if (auto maybe_note = in.get(i); maybe_note.has_value())
m_playing_notes.set(i, maybe_note.value());
// "Press" the necessary notes in the internal representation,
// and "release" all of the others
for (u8 i = 0; i < note_frequencies.size(); ++i) {
if (auto maybe_note = in.get(i); maybe_note.has_value())
m_playing_notes.set(i, maybe_note.value());
if (m_playing_notes.contains(i)) {
Envelope note_envelope = m_playing_notes.get(i)->to_envelope(m_transport->time(), m_attack * m_transport->ms_sample_rate(), m_decay * m_transport->ms_sample_rate(), m_release * m_transport->ms_sample_rate());
if (!note_envelope.is_active()) {
m_playing_notes.remove(i);
continue;
if (m_playing_notes.contains(i)) {
Envelope note_envelope = m_playing_notes.get(i)->to_envelope(sample_time, m_attack * m_transport->ms_sample_rate(), m_decay * m_transport->ms_sample_rate(), m_release * m_transport->ms_sample_rate());
if (!note_envelope.is_active()) {
m_playing_notes.remove(i);
continue;
}
playing_envelopes.append(PitchedEnvelope { note_envelope, i });
}
}
playing_envelopes.append(PitchedEnvelope { note_envelope, i });
for (auto envelope : playing_envelopes) {
double volume = volume_from_envelope(envelope);
double wave = wave_position(envelope.note);
out += volume * wave;
}
}
for (auto envelope : playing_envelopes) {
double volume = volume_from_envelope(envelope);
double wave = wave_position(envelope.note);
out += volume * wave;
}
return out;
}
// Linear ADSR envelope with no peak adjustment.