C++ (Cpp) renderVoices Examples

Example #1

File: juce_Synthesiser.cpp Project: rorywalsh/cabbage

void Synthesiser::processNextBlock (AudioBuffer<floatType>& outputAudio,
                                    const MidiBuffer& midiData,
                                    int startSample,
                                    int numSamples)
{
    // must set the sample rate before using this!
    jassert (sampleRate != 0);
    const int targetChannels = outputAudio.getNumChannels();

    MidiBuffer::Iterator midiIterator (midiData);
    midiIterator.setNextSamplePosition (startSample);

    bool firstEvent = true;
    int midiEventPos;
    MidiMessage m;

    const ScopedLock sl (lock);

    while (numSamples > 0)
    {
        if (! midiIterator.getNextEvent (m, midiEventPos))
        {
            if (targetChannels > 0)
                renderVoices (outputAudio, startSample, numSamples);

            return;
        }

        const int samplesToNextMidiMessage = midiEventPos - startSample;

        if (samplesToNextMidiMessage >= numSamples)
        {
            if (targetChannels > 0)
                renderVoices (outputAudio, startSample, numSamples);

            handleMidiEvent (m);
            break;
        }

        if (samplesToNextMidiMessage < ((firstEvent && ! subBlockSubdivisionIsStrict) ? 1 : minimumSubBlockSize))
        {
            handleMidiEvent (m);
            continue;
        }

        firstEvent = false;

        if (targetChannels > 0)
            renderVoices (outputAudio, startSample, samplesToNextMidiMessage);

        handleMidiEvent (m);
        startSample += samplesToNextMidiMessage;
        numSamples  -= samplesToNextMidiMessage;
    }

    while (midiIterator.getNextEvent (m, midiEventPos))
        handleMidiEvent (m);
}

Example #2

File: juce_Synthesiser.cpp Project: Human-Harp/Human-Harp-Hub

void Synthesiser::renderNextBlock (AudioSampleBuffer& outputBuffer, const MidiBuffer& midiData,
                                   int startSample, int numSamples)
{
    // must set the sample rate before using this!
    jassert (sampleRate != 0);

    const ScopedLock sl (lock);

    MidiBuffer::Iterator midiIterator (midiData);
    midiIterator.setNextSamplePosition (startSample);
    MidiMessage m (0xf4, 0.0);

    while (numSamples > 0)
    {
        int midiEventPos;
        const bool useEvent = midiIterator.getNextEvent (m, midiEventPos)
                                && midiEventPos < startSample + numSamples;

        const int numThisTime = useEvent ? midiEventPos - startSample
                                         : numSamples;

        if (numThisTime > 0)
            renderVoices (outputBuffer, startSample, numThisTime);

        if (useEvent)
            handleMidiEvent (m);

        startSample += numThisTime;
        numSamples -= numThisTime;
    }
}

Example #3

File: juce_Synthesiser.cpp Project: iSynth/JUCE

void Synthesiser::renderNextBlock (AudioSampleBuffer& outputBuffer, const MidiBuffer& midiData,
                                   int startSample, int numSamples)
{
    // must set the sample rate before using this!
    jassert (sampleRate != 0);

    MidiBuffer::Iterator midiIterator (midiData);
    midiIterator.setNextSamplePosition (startSample);

    int midiEventPos;
    MidiMessage m;

    const ScopedLock sl (lock);

    while (numSamples > 0)
    {
        if (! midiIterator.getNextEvent (m, midiEventPos))
        {
            renderVoices (outputBuffer, startSample, numSamples);
            return;
        }

        const int samplesToNextMidiMessage = midiEventPos - startSample;

        if (samplesToNextMidiMessage >= numSamples)
        {
            renderVoices (outputBuffer, startSample, numSamples);
            handleMidiEvent (m);
            break;
        }

        if (samplesToNextMidiMessage < minimumSubBlockSize)
        {
            handleMidiEvent (m);
            continue;
        }

        renderVoices (outputBuffer, startSample, samplesToNextMidiMessage);
        handleMidiEvent (m);
        startSample += samplesToNextMidiMessage;
        numSamples  -= samplesToNextMidiMessage;
    }

    while (midiIterator.getNextEvent (m, midiEventPos))
        handleMidiEvent (m);
}