Multi channel buffer. getReadPointer(), no data available

General JUCE discussion
1

I have set the plugin format for 9.1.6 in two places

MutiplyAudioProcessor::MutiplyAudioProcessor()
#ifndef JucePlugin_PreferredChannelConfigurations
    : AudioProcessor(BusesProperties()
#if ! JucePlugin_IsMidiEffect
#if ! JucePlugin_IsSynth
        .withInput("Input", juce::AudioChannelSet::create9point1point6(), true)
#endif
        .withOutput("Output", juce::AudioChannelSet::create9point1point6(), true)
#endif
    )
#endif
{

}

bool MutiplyAudioProcessor::isBusesLayoutSupported(const BusesLayout& layouts) const
{
#if JucePlugin_IsMidiEffect
    juce::ignoreUnused(layouts);
    return true;
#else
    const auto mainOutputLayout = layouts.getMainOutputChannelSet();
    const auto mainInputLayout = layouts.getMainInputChannelSet();

   
    const bool isOutputNineDotOneSix = mainOutputLayout == juce::AudioChannelSet::create9point1point6();
    if (!isOutputNineDotOneSix)
        return false;

#if !JucePlugin_IsSynth 
   
    const bool isInputNineDotOneSix = mainInputLayout == juce::AudioChannelSet::create9point1point6();
    if (!isInputNineDotOneSix || mainOutputLayout != mainInputLayout)
        return false;
#endif

    return true;
#endif
}
2

Then I used buffer. getReadPointer (0) and so on in proceBlock to obtain audio data, all of which were 0, and no audio entered the plugin! Why is this

3

My audio of 9.1.6 can be played, and I tried to see the value of sample using this code, but all the results returned were 0

    auto* channelData = buffer.getReadPointer(5);
    for (int i = 0; i < 10 && i < buffer.getNumSamples(); ++i)
    {
        DBG( " Sample " << i << ": " << channelData[i]);
    }
4

After my testing, I found that 9.0.4 and below are all normal, only 9.0.4 and above formats, and all the data cannot be read