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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwasmaudiodevice_p.h"
#include <emscripten.h>
#include <emscripten/val.h>
#include <emscripten/bind.h>
#include <AL/al.h>
#include <AL/alc.h>
QT_BEGIN_NAMESPACE
QWasmAudioDevice::QWasmAudioDevice(const char *device, const char *desc, bool isDef, QAudioDevice::Mode mode)
: QAudioDevicePrivate(device, mode)
{
description = QString::fromUtf8(desc);
isDefault = isDef;
minimumChannelCount = 1;
maximumChannelCount = 2;
minimumSampleRate = 8000;
maximumSampleRate = 96000; // js AudioContext max according to docs
// native openAL formats
supportedSampleFormats.append(QAudioFormat::UInt8);
supportedSampleFormats.append(QAudioFormat::Int16);
// Browsers use 32bit floats as native, but emscripten reccomends checking for the exension.
if (alIsExtensionPresent("AL_EXT_float32"))
supportedSampleFormats.append(QAudioFormat::Float);
preferredFormat.setChannelCount(2);
// FIXME: firefox
// An AudioContext was prevented from starting automatically.
// It must be created or resumed after a user gesture on the page.
emscripten::val audioContext = emscripten::val::global("window")["AudioContext"].new_();
if (audioContext == emscripten::val::undefined())
audioContext = emscripten::val::global("window")["webkitAudioContext"].new_();
if (audioContext != emscripten::val::undefined()) {
audioContext.call<void>("resume");
int sRate = audioContext["sampleRate"].as<int>();
audioContext.call<void>("close");
preferredFormat.setSampleRate(sRate);
}
auto f = QAudioFormat::Float;
if (!supportedSampleFormats.contains(f))
f = QAudioFormat::Int16;
preferredFormat.setSampleFormat(f);
}
QT_END_NAMESPACE
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