src/DspBalance.cpp


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#include "pch.h"
#include "DspBalance.h"

#include "AudioRenderer.h"

namespace SaneAudioRenderer
{
    bool DspBalance::Active()
    {
        return m_renderer.GetBalance() != 0.0f;
    }

    void DspBalance::Process(DspChunk& chunk)
    {
        const float balance = m_renderer.GetBalance();
        assert(balance >= -1.0f && balance <= 1.0f);

        if (balance == 0.0f || chunk.IsEmpty() || chunk.GetChannelCount() != 2)
            return;

        DspChunk::ToFloat(chunk);

        auto data = reinterpret_cast<float*>(chunk.GetData());
        const float gain = std::abs(balance);
        for (size_t i = (balance < 0.0f ? 1 : 0), n = chunk.GetSampleCount(); i < n; i += 2)
            data[i] *= gain;
    }

    void DspBalance::Finish(DspChunk& chunk)
    {
        Process(chunk);
    }
}