MappedInstrument::MappedInstrument(const Instrument &instr):
m_type(instr.getType()),
m_id(instr.getId()),
m_name(instr.getName()),
m_device((instr.getDevice())->getId()),
m_audioChannels(instr.getAudioChannels())
{}
void AudioPreviewPainter::paintPreviewImage()
{
const CompositionModelImpl::AudioPreviewData::Values &values =
m_apData->values;
if (values.empty())
return;
float gain[2] = { 1.0, 1.0 };
int instrumentChannels = 2;
TrackId trackId = m_segment->getTrack();
Track *track = m_model.getComposition().getTrackById(trackId);
if (track) {
Instrument *instrument = m_model.getStudio().getInstrumentById(track->getInstrument());
if (instrument) {
float level = AudioLevel::dB_to_multiplier(instrument->getLevel());
float pan = instrument->getPan() - 100.0;
gain[0] = level * ((pan > 0.0) ? (1.0 - (pan / 100.0)) : 1.0);
gain[1] = level * ((pan < 0.0) ? ((pan + 100.0) / 100.0) : 1.0);
instrumentChannels = instrument->getAudioChannels();
}
}
// This was always false.
bool showMinima = false; //m_apData->showsMinima();
unsigned int channels = m_apData->channels;
if (channels == 0) {
RG_DEBUG << "AudioPreviewPainter::paintPreviewImage : problem with audio file for segment "
<< m_segment->getLabel().c_str() << endl;
return;
}
int samplePoints = int(values.size()) / (channels * (showMinima ? 2 : 1));
float h1, h2, l1 = 0, l2 = 0;
double sampleScaleFactor = samplePoints / double(m_rect.getBaseWidth());
m_sliceNb = 0;
initializeNewSlice();
int centre = m_image.height() / 2;
RG_DEBUG << "AudioPreviewPainter::paintPreviewImage width = " << m_rect.getBaseWidth() << ", height = " << m_rect.height() << ", halfRectHeight = " << m_halfRectHeight << endl;
RG_DEBUG << "AudioPreviewPainter::paintPreviewImage: channels = " << channels << ", gain left = " << gain[0] << ", right = " << gain[1] << endl;
// double audioDuration = double(m_segment->getAudioEndTime().sec) +
// double(m_segment->getAudioEndTime().nsec) / 1000000000.0;
// We need to take each pixel value and map it onto a point within
// the preview. We have samplePoints preview points in a known
// duration of audioDuration. Thus each point spans a real time
// of audioDuration / samplePoints. We need to convert the
// accumulated real time back into musical time, and map this
// proportionately across the segment width.
RealTime startRT =
m_model.getComposition().getElapsedRealTime(m_segment->getStartTime());
double startTime = double(startRT.sec) + double(startRT.nsec) / 1000000000.0;
RealTime endRT =
m_model.getComposition().getElapsedRealTime(m_segment->getEndMarkerTime());
double endTime = double(endRT.sec) + double(endRT.nsec) / 1000000000.0;
bool haveTempoChange = false;
int finalTempoChangeNumber =
m_model.getComposition().getTempoChangeNumberAt
(m_segment->getEndMarkerTime());
if ((finalTempoChangeNumber >= 0) &&
(finalTempoChangeNumber >
m_model.getComposition().getTempoChangeNumberAt
(m_segment->getStartTime()))) {
haveTempoChange = true;
}
QSettings settings;
settings.beginGroup( GeneralOptionsConfigGroup );
bool meterLevels = (settings.value("audiopreviewstyle", 1).toUInt()
== 1);
for (int i = 0; i < m_rect.getBaseWidth(); ++i) {
// i is the x coordinate within the rectangle. We need to
// calculate the position within the audio preview from which
// to draw the peak for this coordinate. It's possible there
// may be more than one, in which case we need to find the
// peak of all of them.
int position = 0;
if (haveTempoChange) {
// First find the time corresponding to this i.
timeT musicalTime =
m_model.grid().getRulerScale()->getTimeForX(m_rect.x() + i);
RealTime realTime =
m_model.getComposition().getElapsedRealTime(musicalTime);
double time = double(realTime.sec) +
double(realTime.nsec) / 1000000000.0;
double offset = time - startTime;
if (endTime > startTime) {
position = offset * m_rect.getBaseWidth() / (endTime - startTime);
position = int(channels * position);
}
} else {
position = int(channels * i * sampleScaleFactor);
}
if (position < 0) continue;
if (position >= int(values.size()) - int(channels)) {
finalizeCurrentSlice();
break;
}
if (channels == 1) {
h1 = values[position++];
h2 = h1;
if (showMinima) {
l1 = values[position++];
l2 = l1;
}
} else {
h1 = values[position++];
if (showMinima) l1 = values[position++];
h2 = values[position++];
if (showMinima) l2 = values[position++];
}
if (instrumentChannels == 1 && channels == 2) {
h1 = h2 = (h1 + h2) / 2;
l1 = l2 = (l1 + l2) / 2;
}
h1 *= gain[0];
h2 *= gain[1];
l1 *= gain[0];
l2 *= gain[1];
// int width = 1;
int pixel;
// h1 left, h2 right
if (h1 >= 1.0) { h1 = 1.0; pixel = 2; }
else { pixel = 1; }
int h;
if (meterLevels) {
h = AudioLevel::multiplier_to_preview(h1, m_height);
} else {
h = h1 * m_height;
}
if (h <= 0) h = 1;
if (h > m_halfRectHeight) h = m_halfRectHeight;
int rectX = i % tileWidth();
for (int py = 0; py < h; ++py) {
m_image.setPixel(rectX, centre - py, pixel);
}
if (h2 >= 1.0) { h2 = 1.0; pixel = 2; }
else { pixel = 1; }
if (meterLevels) {
h = AudioLevel::multiplier_to_preview(h2, m_height);
} else {
h = h2 * m_height;
}
if (h < 0) h = 0;
for (int py = 0; py < h; ++py) {
m_image.setPixel(rectX, centre + py, pixel);
}
if (((i+1) % tileWidth()) == 0 || i == (m_rect.getBaseWidth() - 1)) {
finalizeCurrentSlice();
initializeNewSlice();
}
}
/* Auto-fade not yet implemented.
if (m_segment->isAutoFading()) {
Composition &comp = m_model.getComposition();
int audioFadeInEnd = int(
m_model.grid().getRulerScale()->getXForTime(comp.
getElapsedTimeForRealTime(m_segment->getFadeInTime()) +
m_segment->getStartTime()) -
m_model.grid().getRulerScale()->getXForTime(m_segment->getStartTime()));
m_p.setPen(QColor(Qt::blue));
m_p.drawRect(0, m_apData->getSegmentRect().height() - 1, audioFadeInEnd, 1);
m_pb.drawRect(0, m_apData->getSegmentRect().height() - 1, audioFadeInEnd, 1);
}
m_p.end();
m_pb.end();
*/
settings.endGroup();
}