bool CaptureNdkCameraPrivate::nearestFpsRangue(const QString &cameraId,
const AkFrac &fps,
int32_t &min,
int32_t &max) const
{
ACameraMetadata *metaData {nullptr};
if (ACameraManager_getCameraCharacteristics(this->m_manager.data(),
cameraId.toStdString().c_str(),
&metaData) != ACAMERA_OK) {
return false;
}
ACameraMetadata_const_entry frameRates;
if (ACameraMetadata_getConstEntry(metaData,
ACAMERA_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES,
&frameRates) != ACAMERA_OK) {
ACameraMetadata_free(metaData);
return false;
}
auto fpsValue = fps.value();
bool ok = false;
min = 0;
max = 0;
for (uint32_t i = 0; i < frameRates.count; i += 2) {
auto fpsMin = frameRates.data.i32[i + 0];
auto fpsMax = frameRates.data.i32[i + 1];
if (fpsValue >= qreal(fpsMin)
&& fpsValue <= qreal(fpsMax)) {
min = fpsMin;
max = fpsMax;
ok = true;
break;
}
}
ACameraMetadata_free(metaData);
return ok;
}
/**
* EnumerateCamera()
* Loop through cameras on the system, pick up
* 1) back facing one if available
* 2) otherwise pick the first one reported to us
*/
void NDKCamera::EnumerateCamera() {
ACameraIdList* cameraIds = nullptr;
CALL_MGR(getCameraIdList(cameraMgr_, &cameraIds));
for (int i = 0; i < cameraIds->numCameras; ++i) {
const char* id = cameraIds->cameraIds[i];
ACameraMetadata* metadataObj;
CALL_MGR(getCameraCharacteristics(cameraMgr_, id, &metadataObj));
int32_t count = 0;
const uint32_t* tags = nullptr;
ACameraMetadata_getAllTags(metadataObj, &count, &tags);
for (int tagIdx = 0; tagIdx < count; ++tagIdx) {
if (ACAMERA_LENS_FACING == tags[tagIdx]) {
ACameraMetadata_const_entry lensInfo = {
0,
};
CALL_METADATA(getConstEntry(metadataObj, tags[tagIdx], &lensInfo));
CameraId cam(id);
cam.facing_ = static_cast<acamera_metadata_enum_android_lens_facing_t>(
lensInfo.data.u8[0]);
cam.owner_ = false;
cam.device_ = nullptr;
cameras_[cam.id_] = cam;
if (cam.facing_ == ACAMERA_LENS_FACING_BACK) {
activeCameraId_ = cam.id_;
}
break;
}
}
ACameraMetadata_free(metadataObj);
}
ASSERT(cameras_.size(), "No Camera Available on the device");
if (activeCameraId_.length() == 0) {
// if no back facing camera found, pick up the first one to use...
activeCameraId_ = cameras_.begin()->second.id_;
}
ACameraManager_deleteCameraIdList(cameraIds);
}
/**
* GetSensorOrientation()
* Retrieve current sensor orientation regarding to the phone device
* orientation
* SensorOrientation is NOT settable.
*/
bool NDKCamera::GetSensorOrientation(int32_t* facing, int32_t* angle) {
if (!cameraMgr_) {
return false;
}
ACameraMetadata* metadataObj;
ACameraMetadata_const_entry face, orientation;
CALL_MGR(getCameraCharacteristics(cameraMgr_, activeCameraId_.c_str(),
&metadataObj));
CALL_METADATA(getConstEntry(metadataObj, ACAMERA_LENS_FACING, &face));
cameraFacing_ = static_cast<int32_t>(face.data.u8[0]);
CALL_METADATA(
getConstEntry(metadataObj, ACAMERA_SENSOR_ORIENTATION, &orientation));
LOGI("====Current SENSOR_ORIENTATION: %8d", orientation.data.i32[0]);
ACameraMetadata_free(metadataObj);
cameraOrientation_ = orientation.data.i32[0];
if (facing) *facing = cameraFacing_;
if (angle) *angle = cameraOrientation_;
return true;
}