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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 "qandroidvideodevices_p.h"
#include <private/qcameradevice_p.h>
#include <QtCore/QLoggingCategory>
#include <QtCore/qcoreapplication.h>
#include <QtCore/private/qandroidextras_p.h>
#include <QtCore/qcoreapplication_platform.h>
#include <QJniEnvironment>
#include <jni.h>
static Q_LOGGING_CATEGORY(qLCAndroidVideoDevices, "qt.multimedia.ffmpeg.android.videoDevices")
Q_DECLARE_JNI_CLASS(QtVideoDeviceManager,
"org/qtproject/qt/android/multimedia/QtVideoDeviceManager");
Q_DECLARE_JNI_TYPE(StringArray, "[Ljava/lang/String;")
QCameraFormat createCameraFormat(int width, int height, int fpsMin, int fpsMax)
{
QCameraFormatPrivate *format = new QCameraFormatPrivate();
format->resolution = { width, height };
format->minFrameRate = fpsMin;
format->maxFrameRate = fpsMax;
format->pixelFormat = QVideoFrameFormat::PixelFormat::Format_BGRA8888;
return format->create();
}
QList<QCameraDevice> QAndroidVideoDevices::findVideoDevices()
{
QList<QCameraDevice> devices;
QJniObject deviceManager(QtJniTypes::className<QtJniTypes::QtVideoDeviceManager>(),
QNativeInterface::QAndroidApplication::context());
if (!deviceManager.isValid()) {
qCWarning(qLCAndroidVideoDevices) << "Failed to connect to Qt Video Device Manager.";
return devices;
}
QJniObject cameraIdList = deviceManager.callMethod<QtJniTypes::StringArray>("getCameraIdList");
QJniEnvironment jniEnv;
int numCameras = jniEnv->GetArrayLength(cameraIdList.object<jarray>());
if (jniEnv.checkAndClearExceptions())
return devices;
for (int cameraIndex = 0; cameraIndex < numCameras; cameraIndex++) {
QJniObject cameraIdObject =
jniEnv->GetObjectArrayElement(cameraIdList.object<jobjectArray>(), cameraIndex);
if (jniEnv.checkAndClearExceptions())
continue;
jstring cameraId = cameraIdObject.object<jstring>();
QCameraDevicePrivate *info = new QCameraDevicePrivate;
info->id = cameraIdObject.toString().toUtf8();
info->orientation = deviceManager.callMethod<jint>("getSensorOrientation", cameraId);
int facing = deviceManager.callMethod<jint>("getLensFacing", cameraId);
const int LENS_FACING_FRONT = 0;
const int LENS_FACING_BACK = 1;
const int LENS_FACING_EXTERNAL = 2;
switch (facing) {
case LENS_FACING_EXTERNAL:
case LENS_FACING_BACK:
info->position = QCameraDevice::BackFace;
info->description = "Rear Camera";
break;
case LENS_FACING_FRONT:
info->position = QCameraDevice::FrontFace;
info->description = "Front Camera";
break;
}
QJniObject fpsRangesObject =
deviceManager.callMethod<QtJniTypes::StringArray>("getFpsRange", cameraId);
jobjectArray fpsRanges = fpsRangesObject.object<jobjectArray>();
int numRanges = jniEnv->GetArrayLength(fpsRanges);
if (jniEnv.checkAndClearExceptions())
continue;
int maxFps = 0, minFps = 0;
for (int rangeIndex = 0; rangeIndex < numRanges; rangeIndex++) {
QJniObject rangeString = jniEnv->GetObjectArrayElement(fpsRanges, rangeIndex);
if (jniEnv.checkAndClearExceptions())
continue;
QString range = rangeString.toString();
range = range.remove("[");
range = range.remove("]");
auto split = range.split(",");
int min = split[0].toInt();
int max = split[1].toInt();
int distance = max - min;
int maxDistance = maxFps - minFps;
if (maxDistance < distance) {
maxFps = max;
minFps = min;
}
}
const int IMAGEFORMAT_JPEG = 256;
QJniObject sizesObject = deviceManager.callMethod<QtJniTypes::StringArray>(
"getStreamConfigurationsSizes", cameraId, IMAGEFORMAT_JPEG);
jobjectArray streamSizes = sizesObject.object<jobjectArray>();
int numSizes = jniEnv->GetArrayLength(streamSizes);
if (jniEnv.checkAndClearExceptions())
continue;
for (int sizesIndex = 0; sizesIndex < numSizes; sizesIndex++) {
QJniObject sizeStringObject = jniEnv->GetObjectArrayElement(streamSizes, sizesIndex);
if (jniEnv.checkAndClearExceptions())
continue;
QString sizeString = sizeStringObject.toString();
auto split = sizeString.split("x");
int width = split[0].toInt();
int height = split[1].toInt();
info->videoFormats.append(createCameraFormat(width, height, minFps, maxFps));
}
devices.push_back(info->create());
}
return devices;
}
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