Ejemplo n.º 1
0
SoundSource::OpenResult SoundSourceWV::tryOpen(
        OpenMode /*mode*/,
        const OpenParams& params) {
    DEBUG_ASSERT(!m_wpc);
    char msg[80]; // hold possible error message
    int openFlags = OPEN_WVC | OPEN_NORMALIZE;
    if ((params.channelCount() == 1) ||
            (params.channelCount() == 2)) {
        openFlags |= OPEN_2CH_MAX;
    }

    // We use WavpackOpenFileInputEx to support Unicode paths on windows
    // http://www.wavpack.com/lib_use.txt
    QString wavPackFileName = getLocalFileName();
    m_pWVFile = new QFile(wavPackFileName);
    m_pWVFile->open(QFile::ReadOnly);
    QString correctionFileName(wavPackFileName + "c");
    if (QFile::exists(correctionFileName)) {
        // If there is a correction file, open it as well
        m_pWVCFile = new QFile(correctionFileName);
        m_pWVCFile->open(QFile::ReadOnly);
    }
    m_wpc = WavpackOpenFileInputEx(&s_streamReader, m_pWVFile, m_pWVCFile,
            msg, openFlags, 0);
    if (!m_wpc) {
        kLogger.warning() << "failed to open file : " << msg;
        return OpenResult::Failed;
    }

    setChannelCount(WavpackGetReducedChannels(m_wpc));
    setSampleRate(WavpackGetSampleRate(m_wpc));
    initFrameIndexRangeOnce(
            mixxx::IndexRange::forward(
                    0,
                    WavpackGetNumSamples(m_wpc)));

    if (WavpackGetMode(m_wpc) & MODE_FLOAT) {
        m_sampleScaleFactor = CSAMPLE_PEAK;
    } else {
        const int bitsPerSample = WavpackGetBitsPerSample(m_wpc);
        if ((bitsPerSample >= 8) && (bitsPerSample <= 32)) {
            // Range of signed sample values: [-2 ^ (bitsPerSample - 1), 2 ^ (bitsPerSample - 1) - 1]
            const uint32_t absSamplePeak = 1u << (bitsPerSample - 1);
            DEBUG_ASSERT(absSamplePeak > 0);
            // Scaled range of sample values: [-CSAMPLE_PEAK, CSAMPLE_PEAK)
            m_sampleScaleFactor = CSAMPLE_PEAK / absSamplePeak;
        } else {
            kLogger.warning()
                    << "Invalid bits per sample:"
                    << bitsPerSample;
            return OpenResult::Aborted;
        }
    }

    m_curFrameIndex = frameIndexMin();

    return OpenResult::Succeeded;
}
Ejemplo n.º 2
0
SoundSource::OpenResult SoundSourceWV::tryOpen(const AudioSourceConfig& audioSrcCfg) {
    DEBUG_ASSERT(!m_wpc);
    char msg[80]; // hold possible error message
    int openFlags = OPEN_WVC | OPEN_NORMALIZE;
    if ((kChannelCountMono == audioSrcCfg.getChannelCount()) ||
            (kChannelCountStereo == audioSrcCfg.getChannelCount())) {
        openFlags |= OPEN_2CH_MAX;
    }

    // We use WavpackOpenFileInputEx to support Unicode paths on windows
    // http://www.wavpack.com/lib_use.txt
    QString wavPackFileName = getLocalFileName();
    m_pWVFile = new QFile(wavPackFileName);
    m_pWVFile->open(QFile::ReadOnly);
    QString correctionFileName(wavPackFileName + "c");
    if (QFile::exists(correctionFileName)) {
        // If there is a correction file, open it as well
        m_pWVCFile = new QFile(correctionFileName);
        m_pWVCFile->open(QFile::ReadOnly);
    }
    m_wpc = WavpackOpenFileInputEx(&s_streamReader, m_pWVFile, m_pWVCFile,
            msg, openFlags, 0);
    if (!m_wpc) {
        qDebug() << "SSWV::open: failed to open file : " << msg;
        return OpenResult::FAILED;
    }

    setChannelCount(WavpackGetReducedChannels(m_wpc));
    setSamplingRate(WavpackGetSampleRate(m_wpc));
    setFrameCount(WavpackGetNumSamples(m_wpc));

    if (WavpackGetMode(m_wpc) & MODE_FLOAT) {
        m_sampleScaleFactor = CSAMPLE_PEAK;
    } else {
        const int bitsPerSample = WavpackGetBitsPerSample(m_wpc);
        const uint32_t wavpackPeakSampleValue = 1u
                << (bitsPerSample - 1);
        m_sampleScaleFactor = CSAMPLE_PEAK / wavpackPeakSampleValue;
    }

    return OpenResult::SUCCEEDED;
}