Пример #1
0
Uint64 SoundFileReaderWav::read(Int16* samples, Uint64 maxCount)
{
    assert(m_stream);

    Uint64 count = 0;
    Uint64 startPos = m_stream->tell();

    // Tracking of m_dataEnd is important to prevent sf::Music from reading
    // data until EOF, as WAV files may have metadata at the end.
    while ((count < maxCount) && (startPos + count * m_bytesPerSample < m_dataEnd))
    {
        switch (m_bytesPerSample)
        {
            case 1:
            {
                Uint8 sample = 0;
                if (decode(*m_stream, sample))
                    *samples++ = (static_cast<Int16>(sample) - 128) << 8;
                else
                    return count;
                break;
            }

            case 2:
            {
                Int16 sample = 0;
                if (decode(*m_stream, sample))
                    *samples++ = sample;
                else
                    return count;
                break;
            }

            case 3:
            {
                Uint32 sample = 0;
                if (decode24bit(*m_stream, sample))
                    *samples++ = sample >> 8;
                else
                    return count;
                break;
            }

            case 4:
            {
                Uint32 sample = 0;
                if (decode(*m_stream, sample))
                    *samples++ = sample >> 16;
                else
                    return count;
                break;
            }

            default:
            {
                assert(false);
                return 0;
            }
        }
Пример #2
0
Uint64 SoundFileReaderWav::read(Int16* samples, Uint64 maxCount)
{
    assert(m_stream);

    Uint64 count = 0;
    while ((count < maxCount) && (m_stream->tell() < m_dataEnd))
    {
        switch (m_bytesPerSample)
        {
            case 1:
            {
                Uint8 sample = 0;
                if (decode(*m_stream, sample))
                    *samples++ = (static_cast<Int16>(sample) - 128) << 8;
                else
                    return count;
                break;
            }

            case 2:
            {
                Int16 sample = 0;
                if (decode(*m_stream, sample))
                    *samples++ = sample;
                else
                    return count;
                break;
            }

            case 3:
            {
                Uint32 sample = 0;
                if (decode24bit(*m_stream, sample))
                    *samples++ = sample >> 8;
                else
                    return count;
                break;
            }

            case 4:
            {
                Uint32 sample = 0;
                if (decode(*m_stream, sample))
                    *samples++ = sample >> 16;
                else
                    return count;
                break;
            }

            default:
            {
                assert(false);
                return 0;
            }
        }