Method SetRowValue

engine/Poseidon/UI/Options/AudioPage.cpp:186–301

}

void AudioPage::AudioProvider::SetRowValue(int row, int v)
{
    // Volume changes apply live with StartPreview() so the user hears
    // the new level immediately (legacy DisplayOptionsAudio behaviour).
    // UI 0..100 maps to internal 0..10 (the IAudioSystem volume scale).
    if (GSoundsys)
    {
        float vf = AudioPage::PercentToVolume(v);
        switch (row)
        {
            case kRowMusic:
                // Music: long-form sample.  Don't restart on volume
                // change — UpdateMixer (called from SetCDVolume) updates
                // the running wave's _volumeAdjustMusic which feeds
                // WaveOAL::ApplyVolume on the next render tick, so the
                // user hears the new level live without the wave
                // cutting and restarting from the head.  StartCategoryPreview
                // only fires from the focus-dwell path in TickPreviewLoop.
                GSoundsys->SetCDVolume(vf);
                return;
            case kRowEffects:
                GSoundsys->SetWaveVolume(vf);
                GSoundsys->StartCategoryPreview(WaveEffect);
                return;
            case kRowSpeech:
                GSoundsys->SetSpeechVolume(vf);
                GSoundsys->StartCategoryPreview(WaveSpeech);
                return;
            case kRowOutputDev:
            {
                if (m_outputDevs.empty())
                    RebuildOutputDeviceList();
                if (v < 0 || v >= (int)m_outputDevs.size())
                    return;

                const int count = (int)m_outputDevs.size();
                const int curr = RowValue(row);
                int direction = 1;
                if (count > 1)
                {
                    if (v == (curr + count - 1) % count)
                        direction = -1;
                    else if (v == (curr + 1) % count)
                        direction = 1;
                    else
                        direction = (v > curr) ? 1 : -1;
                }

                bool filteredAny = false;
                for (int offset = 0; offset < count; ++offset)
                {
                    int candidate = curr + direction * (offset + 1);
                    while (candidate < 0)
                        candidate += count;
                    candidate %= count;

                    if (candidate != 0 && m_unavailableOutputDevs.count(m_outputDevs[candidate]))
                        continue;