driver.cpp

#include "driver.h"

#define DB_TO_A(__db) (std::pow(2, (__db / 10.0)))

vrok::Driver::Driver()
    : BufferGraph::Point(), _work(true), _volume(1.0), _meter("out"), _input_bc(0, 0, 0), _first_run(true) { }

void vrok::Driver::SetVolume(real_t volume) {
    _volume = DB_TO_A(volume);
}

std::vector<vrok::VUMeter *> vrok::Driver::GetMeters() {
    std::vector<vrok::VUMeter *> meters;
    meters.push_back(&_meter);
    return meters;
}

void vrok::Driver::Run() {
    auto buffers = PeakAllSources();
    if (buffers) {
        BufferConfig *c = buffers[0]->GetBufferConfig();

        if (_first_run || (_input_bc != *c)) {
            if (BufferConfigChange(c) == false) {
                WARN(0, "BufferConfig failed");
                return;
            }
            _first_run = false;
            _input_bc = *c;
            SetBufferConfig(c);
        }

        // unchecked mixing
        for (size_t i = 0; i < _sources.size(); i++) {
            for (int j = 0; j < c->frames * c->channels; j++) {
                real_t val = 0.5 * buffers[0]->GetData()[j] + 0.5 * buffers[i]->GetData()[j];
                buffers[0]->GetData()[j] = val * _volume;
            }
        }
#ifdef VU_METERS
        _meter.Process(buffers[0]);
#endif
        _work = DriverRun(buffers[0]);
        ReleaseAllSources(buffers);
    }
}