50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
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#include "Sine.hpp"
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namespace muz
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{
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/*explicit*/ Sine::Sine(AudioConf const& conf,
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std::unique_ptr<Signal> freq,
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std::unique_ptr<Signal> amplitude)
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: m_conf { conf }
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, m_freq { std::move(freq) }
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, m_amplitude { std::move(amplitude) }
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{
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for (size_t i=0; i<static_cast<size_t>(m_conf.channels()); i++)
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{
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m_phases.push_back(0.0f);
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}
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}
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/*virtual*/ Sine::~Sine()
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{
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}
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std::vector<float> Sine::next() /*override*/
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{
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assert(m_freq);
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assert(m_amplitude);
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std::vector<float> out;
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auto freqs = m_freq->next();
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auto amps = m_amplitude->next();
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if (freqs.size() != amps.size()
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|| freqs.size() != m_phases.size())
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{
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throw signal_error {"cannot generate sine: channel number mismatch"};
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}
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for (size_t i=0; i<static_cast<size_t>(m_conf.channels()); i++)
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{
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float const value = amps[i] * std::sin(m_phases[i]);
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m_phases[i] += 2 * M_PI * freqs[i]
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/ static_cast<float>(m_conf.samplerate());
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out.push_back(value);
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}
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return out;
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}
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}
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