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block based processing

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This commit is contained in:
Chris
2023-08-16 13:30:39 +02:00
parent 044f42374b
commit 9dc4dd5192
4 changed files with 73 additions and 59 deletions
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62
synth/voice_allocator.h
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@@ -14,7 +14,7 @@ public:
: voices(4, t_voice())
{
// checks whether template derives from ivoice
typedef t_voice assert_at_compile_time[is_convertible<t_voice>::value ? 1 : -1];
typedef t_voice assert_at_compile_time[is_convertible<t_voice, t_sample>::value ? 1 : -1];
}
void set_voice_count(const int& voice_count) { voices.resize(voice_count, voices.at(0)); }
@@ -39,17 +39,16 @@ public:
void process_samples(t_sample** _outputs, int _start_index, int _block_size)
{
for (int s = _start_index; s < _start_index + _block_size; s++) {
for (int b = _start_index; b < _start_index + _block_size; b += internal_block_size) {
process_events(s);
const int block_size = internal_block_size;
float voices_signal = 0.;
// process all events in the block (introduces potential inaccuracy of up to 16 samples)
process_events(b, block_size);
std::for_each(voices.begin(), voices.end(),
[&voices_signal](t_voice& voice) { voices_signal += (voice.process_sample() / 3.); });
_outputs[0][s] = voices_signal;
_outputs[1][s] = voices_signal;
std::for_each(voices.begin(), voices.end(), [&_outputs, &b, &block_size](t_voice& voice) {
voice.process_samples(_outputs, b, block_size);
});
}
}
@@ -75,6 +74,7 @@ public:
private:
std::vector<midi_event> input_queue;
int index_to_steal = 0;
const int internal_block_size = 16;
t_voice* get_free_voice(float frequency)
{
@@ -111,31 +111,33 @@ private:
return free_voice;
}
void process_events(int _start_index)
void process_events(int _start_index, int _block_size)
{
auto iterator = input_queue.begin();
while (iterator != input_queue.end()) {
for (int s = _start_index; s < _start_index + _block_size; s++) {
auto iterator = input_queue.begin();
while (iterator != input_queue.end()) {
midi_event& event = *iterator;
if (event.offset == _start_index) {
midi_event& event = *iterator;
if (event.offset == _start_index) {
switch (event.type) {
case midi_event_type::note_on:
note_on(event);
break;
case midi_event_type::note_off:
note_off(event);
break;
case midi_event_type::pitch_wheel:
access([&event](t_voice& voice) { voice.modulate_pitch(event.data); });
break;
default:
break;
switch (event.type) {
case midi_event_type::note_on:
note_on(event);
break;
case midi_event_type::note_off:
note_off(event);
break;
case midi_event_type::pitch_wheel:
access([&event](t_voice& voice) { voice.modulate_pitch(event.data); });
break;
default:
break;
}
iterator = input_queue.erase(iterator);
} else {
iterator++;
}
iterator = input_queue.erase(iterator);
} else {
iterator++;
}
}
}