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#include "sources/audiosourcestereoproxy.h"
#include "util/logger.h"
#include "util/sample.h"
namespace mixxx {
namespace {
const Logger kLogger("AudioSourceStereoProxy");
constexpr audio::ChannelCount kChannelCount = audio::ChannelCount::stereo();
audio::SignalInfo proxySignalInfo(
const audio::SignalInfo& signalInfo) {
DEBUG_ASSERT(signalInfo.isValid());
return audio::SignalInfo(
kChannelCount,
signalInfo.getSampleRate());
}
} // anonymous namespace
AudioSourceStereoProxy::AudioSourceStereoProxy(
AudioSourcePointer pAudioSource,
SINT maxReadableFrames)
: AudioSourceProxy(
std::move(pAudioSource),
proxySignalInfo(pAudioSource->getSignalInfo())),
m_tempSampleBuffer(
(m_pAudioSource->getSignalInfo().getChannelCount() != kChannelCount) ?
m_pAudioSource->getSignalInfo().frames2samples(maxReadableFrames) :
0),
m_tempWritableSlice(m_tempSampleBuffer) {
}
AudioSourceStereoProxy::AudioSourceStereoProxy(
AudioSourcePointer pAudioSource,
SampleBuffer::WritableSlice tempWritableSlice)
: AudioSourceProxy(
std::move(pAudioSource),
proxySignalInfo(pAudioSource->getSignalInfo())),
m_tempWritableSlice(std::move(tempWritableSlice)) {
}
namespace {
inline bool isDisjunct(
const SampleBuffer::WritableSlice& slice1,
const SampleBuffer::WritableSlice& slice2) {
if (slice1.data() == slice2.data()) {
return false;
}
if ((slice1.length() == 0) || (slice2.length() == 0)) {
return true;
}
if (slice1.data() < slice2.data()) {
return slice1.data(slice1.length()) <= slice2.data();
} else {
return slice2.data(slice2.length()) <= slice1.data();
}
}
} // namespace
ReadableSampleFrames AudioSourceStereoProxy::readSampleFramesClamped(
const WritableSampleFrames& sampleFrames) {
if (m_pAudioSource->getSignalInfo().getChannelCount() == kChannelCount) {
return readSampleFramesClampedOn(*m_pAudioSource, sampleFrames);
}
// Check location and capacity of temporary buffer
VERIFY_OR_DEBUG_ASSERT(isDisjunct(
m_tempWritableSlice,
SampleBuffer::WritableSlice(sampleFrames.writableSlice()))) {
kLogger.warning()
<< "Overlap between output and temporary sample buffer detected";
return ReadableSampleFrames();
}
{
const SINT numberOfSamplesToRead =
m_pAudioSource->getSignalInfo().frames2samples(
sampleFrames.frameLength());
VERIFY_OR_DEBUG_ASSERT(m_tempWritableSlice.length() >= numberOfSamplesToRead) {
kLogger.warning()
<< "Insufficient temporary sample buffer capacity"
<< m_tempWritableSlice.length()
<< "<"
<< numberOfSamplesToRead
<< "for reading frames"
<< sampleFrames.frameIndexRange();
return ReadableSampleFrames();
}
}
const auto readableSampleFrames =
readSampleFramesClampedOn(
*m_pAudioSource,
WritableSampleFrames(
sampleFrames.frameIndexRange(),
m_tempWritableSlice));
if (readableSampleFrames.frameIndexRange().empty()) {
return readableSampleFrames;
}
DEBUG_ASSERT(
readableSampleFrames.frameIndexRange().isSubrangeOf(sampleFrames.frameIndexRange()));
DEBUG_ASSERT(
readableSampleFrames.frameIndexRange().start() >=
sampleFrames.frameIndexRange().start());
const SINT frameOffset =
readableSampleFrames.frameIndexRange().start() -
sampleFrames.frameIndexRange().start();
SampleBuffer::WritableSlice writableSlice(
sampleFrames.writableData(getSignalInfo().frames2samples(frameOffset)),
getSignalInfo().frames2samples(readableSampleFrames.frameLength()));
if (m_pAudioSource->getSignalInfo().getChannelCount() == 1) {
SampleUtil::copyMonoToDualMono(
writableSlice.data(),
readableSampleFrames.readableData(),
readableSampleFrames.frameLength());
} else {
SampleUtil::copyMultiToStereo(
writableSlice.data(),
readableSampleFrames.readableData(),
readableSampleFrames.frameLength(),
m_pAudioSource->getSignalInfo().getChannelCount());
}
return ReadableSampleFrames(
readableSampleFrames.frameIndexRange(),
SampleBuffer::ReadableSlice(
writableSlice.data(),
writableSlice.length()));
}
} // namespace mixxx
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