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;
}
void SoundSourceFLAC::flacMetadata(const FLAC__StreamMetadata* metadata) {
// https://xiph.org/flac/api/group__flac__stream__decoder.html#ga43e2329c15731c002ac4182a47990f85
// "...one STREAMINFO block, followed by zero or more other metadata blocks."
// "...by default the decoder only calls the metadata callback for the STREAMINFO block..."
// "...always before the first audio frame (i.e. write callback)."
switch (metadata->type) {
case FLAC__METADATA_TYPE_STREAMINFO: {
setChannelCount(metadata->data.stream_info.channels);
setSampleRate(metadata->data.stream_info.sample_rate);
initFrameIndexRangeOnce(
IndexRange::forward(
0,
metadata->data.stream_info.total_samples));
const unsigned bitsPerSample = metadata->data.stream_info.bits_per_sample;
DEBUG_ASSERT(kBitsPerSampleDefault != bitsPerSample);
if (kBitsPerSampleDefault == m_bitsPerSample) {
// not set before
if ((bitsPerSample >= 4) && (bitsPerSample <= 32)) {
m_bitsPerSample = bitsPerSample;
} else {
kLogger.warning()
<< "Invalid bits per sample:"
<< bitsPerSample;
}
} else {
// already set before -> check for consistency
if (bitsPerSample != m_bitsPerSample) {
kLogger.warning()
<< "Unexpected bits per sample:"
<< bitsPerSample << " <> " << m_bitsPerSample;
}
}
m_maxBlocksize = metadata->data.stream_info.max_blocksize;
if (0 >= m_maxBlocksize) {
kLogger.warning()
<< "Invalid max. blocksize" << m_maxBlocksize;
}
const SINT sampleBufferCapacity =
m_maxBlocksize * channelCount();
if (m_sampleBuffer.capacity() < sampleBufferCapacity) {
m_sampleBuffer.adjustCapacity(sampleBufferCapacity);
}
break;
}
default:
// Ignore all other metadata types
break;
}
}
SoundSource::OpenResult SoundSourceOggVorbis::tryOpen(
OpenMode /*mode*/,
const OpenParams& /*config*/) {
m_pFile = std::make_unique<QFile>(getLocalFileName());
if (!m_pFile->open(QFile::ReadOnly)) {
kLogger.warning()
<< "Failed to open file for"
<< getUrlString();
return OpenResult::Failed;
}
const int initDecoderResult = ov_open_callbacks(m_pFile.get(), &m_vf, nullptr, 0, s_callbacks);
switch (initDecoderResult) {
case 0:
// success -> continue
break;
case OV_ENOTVORBIS:
case OV_EVERSION:
kLogger.warning()
<< "Unsupported format in"
<< getUrlString();
return OpenResult::Aborted;
default:
kLogger.warning()
<< "Failed to initialize decoder for"
<< getUrlString();
return OpenResult::Failed;
}
if (!ov_seekable(&m_vf)) {
kLogger.warning()
<< "Stream in"
<< getUrlString()
<< "is not seekable";
return OpenResult::Aborted;
}
// lookup the ogg's channels and sample rate
const vorbis_info* vi = ov_info(&m_vf, kCurrentBitstreamLink);
if (!vi) {
kLogger.warning()
<< "Failed to read stream info from"
<< getUrlString();
return OpenResult::Failed;
}
setChannelCount(vi->channels);
setSampleRate(vi->rate);
if (0 < vi->bitrate_nominal) {
initBitrateOnce(vi->bitrate_nominal / 1000);
} else {
if ((0 < vi->bitrate_lower) && (vi->bitrate_lower == vi->bitrate_upper)) {
initBitrateOnce(vi->bitrate_lower / 1000);
}
}
ogg_int64_t pcmTotal = ov_pcm_total(&m_vf, kEntireBitstreamLink);
if (0 <= pcmTotal) {
initFrameIndexRangeOnce(IndexRange::forward(0, pcmTotal));
} else {
kLogger.warning()
<< "Failed to read read total length of"
<< getUrlString();
return OpenResult::Failed;
}
return OpenResult::Succeeded;
}
