Method createBusFromRecording

src/extended/RecorderNode.cpp:195–233

}

std::unique_ptr<AudioBus> RecorderNode::createBusFromRecording(bool mixToMono)
{
    std::lock_guard<std::recursive_mutex> lock(m_mutex);

    int numSamples = static_cast<int>(m_data[0].size());
    if (!numSamples) return {};

    const int result_channel_count = mixToMono ? 1 : m_channelCount;

    // Create AudioBus where we'll put the PCM audio data
    std::unique_ptr<lab::AudioBus> result_audioBus(new lab::AudioBus(result_channel_count, numSamples));
    result_audioBus->setSampleRate(m_sampleRate);

    // Mix channels to mono if requested, and there's more than one input channel.
    if (m_channelCount > 1 && mixToMono)
    {
        float* destinationMono = result_audioBus->channel(0)->mutableData();

        for (int i = 0; i < numSamples; i++)
        {
            destinationMono[i] = 0;
            for (size_t j = 0; j < m_channelCount; ++j)
                destinationMono[i] += m_data[j][i];
            destinationMono[i] *= 1.f / static_cast<float>(m_channelCount);
        }
    }
    else
    {
        for (int i = 0; i < result_channel_count; ++i)
        {
            memcpy(result_audioBus->channel(i)->mutableData(), m_data[0].data(), numSamples * sizeof(float));
        }
    }

    for (int i = 0; i < m_data.size(); ++i)
        m_data[i].clear();

    return result_audioBus;
}


void RecorderNode::reset(ContextRenderLock & r)