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#include <QtDebug>
#include "waveform/waveform.h"
#include "proto/waveform.pb.h"
using namespace mixxx::track;
const int kNumChannels = 2;
// Return the smallest power of 2 which is greater than the desired size when
// squared.
int computeTextureStride(int size) {
int stride = 256;
while (stride * stride < size) {
stride *= 2;
}
return stride;
}
Waveform::Waveform(const QByteArray& data)
: m_id(-1),
m_saveState(SaveState::NotSaved),
m_dataSize(0),
m_visualSampleRate(0),
m_audioVisualRatio(0),
m_textureStride(computeTextureStride(0)),
m_completion(-1) {
readByteArray(data);
}
Waveform::Waveform(int audioSampleRate, int audioSamples,
int desiredVisualSampleRate, int maxVisualSamples)
: m_id(-1),
m_saveState(SaveState::NotSaved),
m_dataSize(0),
m_visualSampleRate(0),
m_audioVisualRatio(0),
m_textureStride(1024),
m_completion(-1) {
int numberOfVisualSamples = 0;
if (audioSampleRate > 0) {
if (maxVisualSamples == -1) {
// Waveform
if (desiredVisualSampleRate < audioSampleRate) {
m_visualSampleRate =
static_cast<double>(desiredVisualSampleRate);
} else {
m_visualSampleRate = static_cast<double>(audioSampleRate);
}
} else {
// Waveform Summary (Overview)
if (audioSamples > maxVisualSamples) {
m_visualSampleRate = (double)maxVisualSamples *
(double)audioSampleRate / (double)audioSamples;
} else {
m_visualSampleRate = audioSampleRate;
}
}
m_audioVisualRatio = (double)audioSampleRate / (double)m_visualSampleRate;
numberOfVisualSamples = static_cast<int>(audioSamples / m_audioVisualRatio) + 1;
numberOfVisualSamples += numberOfVisualSamples%2;
}
assign(numberOfVisualSamples, 0);
setCompletion(0);
}
Waveform::~Waveform() {
}
QByteArray Waveform::toByteArray() const {
io::Waveform waveform;
waveform.set_visual_sample_rate(m_visualSampleRate);
waveform.set_audio_visual_ratio(m_audioVisualRatio);
io::Waveform::Signal* all = waveform.mutable_signal_all();
io::Waveform::FilteredSignal* filtered = waveform.mutable_signal_filtered();
// TODO(rryan) get the actual cutoff values from analyzerwaveform.cpp so
// that if they change we don't have to remember to update these.
// Frequency cutoffs for butterworth filters:
// filtered->set_low_cutoff_frequency(200);
// filtered->set_mid_low_cutoff_frequency(200);
// filtered->set_mid_high_cutoff_frequency(2000);
// filtered->set_high_cutoff_frequency(2000);
// Frequency cutoff for bessel_lowpass4
filtered->set_low_cutoff_frequency(600);
// Frequency cutoff for bessel_bandpass
filtered->set_mid_low_cutoff_frequency(600);
filtered->set_mid_high_cutoff_frequency(4000);
// Frequency cutoff for bessel_highpass4
filtered->set_high_cutoff_frequency(4000);
io::Waveform::Signal* low = filtered->mutable_low();
io::Waveform::Signal* mid = filtered->mutable_mid();
io::Waveform::Signal* high = filtered->mutable_high();
// TODO(vrince) set max/min for each signal
int numChannels = kNumChannels;
all->set_units(io::Waveform::RMS);
all->set_channels(numChannels);
low->set_units(io::Waveform::RMS);
low->set_channels(numChannels);
mid->set_units(io::Waveform::RMS);
mid->set_channels(numChannels);
high->set_units(io::Waveform::RMS);
high->set_channels(numChannels);
int dataSize = getDataSize();
for (int i = 0; i < dataSize; ++i) {
const WaveformData& datum = m_data.at(i);
all->add_value(datum.filtered.all);
low->add_value(datum.filtered.low);
mid->add_value(datum.filtered.mid);
high->add_value(datum.filtered.high);
}
qDebug() << "Writing waveform from byte array:"
<< "dataSize" << dataSize
<< "allSignalSize" << all->value_size()
<< "visualSampleRate" << waveform.visual_sample_rate()
<< "audioVisualRatio" << waveform.audio_visual_ratio();
std::string output;
waveform.SerializeToString(&output);
return QByteArray(output.data(), static_cast<int>(output.length()));
}
void Waveform::readByteArray(const QByteArray& data) {
if (data.isNull()) {
return;
}
io::Waveform waveform;
if (!waveform.ParseFromArray(data.constData(), data.size())) {
qDebug() << "ERROR: Could not parse Waveform from QByteArray of size "
<< data.size();
return;
}
if (!waveform.has_visual_sample_rate() ||
!waveform.has_audio_visual_ratio() ||
!waveform.has_signal_all() ||
!waveform.has_signal_filtered() ||
!waveform.signal_filtered().has_low() ||
!waveform.signal_filtered().has_mid() ||
!waveform.signal_filtered().has_high()) {
qDebug() << "ERROR: Waveform proto is missing key data. Skipping.";
return;
}
const io::Waveform::Signal& all = waveform.signal_all();
const io::Waveform::Signal& low = waveform.signal_filtered().low();
const io::Waveform::Signal& mid = waveform.signal_filtered().mid();
const io::Waveform::Signal& high = waveform.signal_filtered().high();
qDebug() << "Reading waveform from byte array:"
<< "allSignalSize" << all.value_size()
<< "visualSampleRate" << waveform.visual_sample_rate()
<< "audioVisualRatio" << waveform.audio_visual_ratio();
resize(all.value_size());
int dataSize = getDataSize();
if (all.value_size() != dataSize) {
qDebug() << "ERROR: Couldn't resize Waveform to" << all.value_size()
<< "while reading.";
resize(0);
m_saveState = SaveState::NotSaved;
return;
}
m_visualSampleRate = waveform.visual_sample_rate();
m_audioVisualRatio = waveform.audio_visual_ratio();
if (low.value_size() != dataSize ||
mid.value_size() != dataSize ||
high.value_size() != dataSize) {
qDebug() << "WARNING: Filtered data size does not match all-signal size.";
}
// TODO(XXX) If non-RMS, convert but since we only save RMS today we can add
// this later.
bool low_valid = low.units() == io::Waveform::RMS;
bool mid_valid = mid.units() == io::Waveform::RMS;
bool high_valid = high.units() == io::Waveform::RMS;
for (int i = 0; i < dataSize; ++i) {
m_data[i].filtered.all = static_cast<unsigned char>(all.value(i));
bool use_low = low_valid && i < low.value_size();
bool use_mid = mid_valid && i < mid.value_size();
bool use_high = high_valid && i < high.value_size();
m_data[i].filtered.low = use_low ? static_cast<unsigned char>(low.value(i)) : 0;
m_data[i].filtered.mid = use_mid ? static_cast<unsigned char>(mid.value(i)) : 0;
m_data[i].filtered.high = use_high ? static_cast<unsigned char>(high.value(i)) : 0;
}
m_completion = dataSize;
m_saveState = SaveState::Saved;
}
void Waveform::resize(int size) {
m_dataSize = size;
m_textureStride = computeTextureStride(size);
m_data.resize(m_textureStride * m_textureStride);
}
void Waveform::assign(int size, int value) {
m_dataSize = size;
m_textureStride = computeTextureStride(size);
m_data.assign(m_textureStride * m_textureStride, value);
m_saveState = SaveState::SavePending;
}
void Waveform::dump() const {
qDebug() << "Waveform" << this
<< "size("+QString::number(getDataSize())+")"
<< "textureStride("+QString::number(m_textureStride)+")"
<< "completion("+QString::number(getCompletion())+")"
<< "visualSampleRate("+QString::number(m_visualSampleRate)+")"
<< "audioVisualRatio("+QString::number(m_audioVisualRatio)+")";
}
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