Method onLoop

src/SFML/Audio/Music.cpp:289–312

///////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
std::optional<std::uint64_t> Music::onLoop()
{
    // Called by underlying SoundStream so we can determine where to loop.
    const std::lock_guard lock(m_impl->mutex);
    const std::uint64_t   currentOffset = m_impl->file.getSampleOffset();

    if (isLooping() && (m_impl->loopSpan.length != 0) &&
        (currentOffset == m_impl->loopSpan.offset + m_impl->loopSpan.length))
    {
        // Looping is enabled, and either we're at the loop end, or we're at the EOF
        // when it's equivalent to the loop end (loop end takes priority). Send us to loop begin
        m_impl->file.seek(m_impl->loopSpan.offset);
        return m_impl->file.getSampleOffset();
    }

    if (isLooping() && (currentOffset >= m_impl->file.getSampleCount()))
    {
        // If we're at the EOF, reset to 0
        m_impl->file.seek(0);
        return 0;
    }

    return std::nullopt;
}


////////////////////////////////////////////////////////////