Method copyFrom

src/core/AudioBus.cpp:245–269

Just copies the samples from the source bus to this one. This is just a simple copy if the number of channels match, otherwise a mixup or mixdown is done. For now, we just support mixup from mono -> stereo and mixdown from stereo -> mono.

// This is just a simple copy if the number of channels match, otherwise a mixup or mixdown is done.
// For now, we just support mixup from mono -> stereo and mixdown from stereo -> mono.
void AudioBus::copyFrom(const AudioBus & sourceBus, ChannelInterpretation channelInterpretation)
{
    if (&sourceBus == this) return;

    int numberOfSourceChannels = sourceBus.numberOfChannels();
    int numberOfDestinationChannels = numberOfChannels();

    if (numberOfDestinationChannels == numberOfSourceChannels)
    {
        for (int i = 0; i < numberOfSourceChannels; ++i)
        {
            channel(i)->copyFrom(sourceBus.channel(i));
        }
    }
    else
    {
        switch (channelInterpretation)
        {
            case ChannelInterpretation::Speakers: speakersCopyFrom(sourceBus); break;
            case ChannelInterpretation::Discrete: discreteCopyFrom(sourceBus); break;
            default:
                ASSERT_NOT_REACHED();
        }
    }
}

void AudioBus::sumFrom(const AudioBus & sourceBus, ChannelInterpretation channelInterpretation)
{