6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2025-10-31 05:16:08 +00:00
Code Issues Projects Releases Wiki Activity

Actually, QIODevice is listed as reentrant. So no need to forward audio.

Browse Source 
That said, latency is still absurd for some reason.
This commit is contained in:
Thomas Harte
2020-06-06 23:47:57 -04:00
parent 7c7cb61d2f
commit 63ad1290f4
1 changed files with 10 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
OSBindings/Qt/mainwindow.cpp
View File

@@ -7,15 +7,6 @@
#include "../../Numeric/CRC.hpp"
namespace {
struct AudioEvent: public QEvent {
AudioEvent() : QEvent(QEvent::Type::User) {}
std::vector<int16_t> audio;
};
}
/*
General Qt implementation notes:
@@ -177,17 +168,17 @@ void MainWindow::launchMachine() {
QAudioFormat idealFormat = defaultDeviceInfo.preferredFormat();
// Use the ideal format's sample rate, provide stereo as long as at least two channels
// are available, and — at least for now — assume 512 samples/buffer is a good size.
// are available, and — at least for now — assume a good buffer size.
audioIsStereo = (idealFormat.channelCount() > 1) && speaker->get_is_stereo();
audioIs8bit = idealFormat.sampleSize() < 16;
const int samplesPerBuffer = 512;
const int samplesPerBuffer = 256;
speaker->set_output_rate(idealFormat.sampleRate(), samplesPerBuffer, audioIsStereo);
// Adjust format appropriately, and create an audio output.
idealFormat.setChannelCount(1 + int(audioIsStereo));
idealFormat.setSampleSize(audioIs8bit ? 8 : 16);
audioOutput = std::make_unique<QAudioOutput>(idealFormat, this);
audioOutput->setBufferSize(samplesPerBuffer * (audioIsStereo ? 2 : 1) * (audioIs8bit ? 1 : 2));
// audioOutput->setBufferSize(samplesPerBuffer * (audioIsStereo ? 2 : 1) * (audioIs8bit ? 1 : 2));
qDebug() << idealFormat;
@@ -235,13 +226,13 @@ void MainWindow::launchMachine() {
}
void MainWindow::speaker_did_complete_samples(Outputs::Speaker::Speaker *, const std::vector<int16_t> &buffer) {
// Forward this buffrer to the QThread that QAudioOutput lives on.
AudioEvent *event = new AudioEvent;
event->audio = buffer;
QApplication::instance()->postEvent(this, event);
// const auto bytesWritten = audioIODevice->write(reinterpret_cast<const char *>(buffer.data()), qint64(buffer.size()));
// qDebug() << bytesWritten << "; " << audioOutput->state();
// (void)bytesWritten;
const char *data = reinterpret_cast<const char *>(buffer.data());
size_t sizeLeft = buffer.size() * sizeof(int16_t);
while(sizeLeft) {
const auto bytesWritten = audioIODevice->write(data, qint64(sizeLeft));
sizeLeft -= bytesWritten;
data += bytesWritten;
}
}
void MainWindow::dragEnterEvent(QDragEnterEvent* event) {
@@ -319,19 +310,6 @@ bool MainWindow::eventFilter(QObject *obj, QEvent *event) {
}
} break;
case QEvent::User: {
const auto audioEvent = dynamic_cast<AudioEvent *>(event);
if(audioEvent) {
const char *buffer = reinterpret_cast<const char *>(audioEvent->audio.data());
size_t sizeLeft = audioEvent->audio.size() * sizeof(int16_t);
while(sizeLeft) {
const auto bytesWritten = audioIODevice->write(buffer, qint64(sizeLeft));
sizeLeft -= bytesWritten;
buffer += bytesWritten;
}
}
} break;
default:
break;
}