CameraAREngine.cpp

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/*
Copyright (c) 2010-2016, Mathieu Labbe - IntRoLab - Universite de Sherbrooke
All rights reserved.
 
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the Universite de Sherbrooke nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.
 
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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*/
 
#include "CameraAREngine.h"
#include "util.h"
#include "rtabmap/utilite/ULogger.h"
#include "rtabmap/core/util3d_transforms.h"
#include "rtabmap/core/OdometryEvent.h"
#include "rtabmap/core/util2d.h"
 
#include <media/NdkImage.h>
 
namespace rtabmap {
 
 
// CameraAREngine
CameraAREngine::CameraAREngine(void* env, void* context, void* activity, bool smoothing, float upstreamRelocalizationAccThr):
        CameraMobile(smoothing, upstreamRelocalizationAccThr),
        env_(env),
        context_(context),
        activity_(activity),
        arInstallRequested_(false)
{
        glGenTextures(1, &textureId_);
}
 
CameraAREngine::~CameraAREngine() {
        // Disconnect ARCore service
        close();
 
        glDeleteTextures(1, &textureId_);
}
 
std::string CameraAREngine::getSerial() const
{
        return "AREngine";
}
 
bool CameraAREngine::init(const std::string & calibrationFolder, const std::string & cameraName)
{
        close();
 
        CameraMobile::init(calibrationFolder, cameraName);
 
        UScopeMutex lock(arSessionMutex_);
 
        HwArInstallStatus install_status;
        // If install was not yet requested, that means that we are resuming the
        // activity first time because of explicit user interaction (such as
        // launching the application)
        bool user_requested_install = !arInstallRequested_;
 
        // === ATTENTION!  ATTENTION!  ATTENTION! ===
        // This method can and will fail in user-facing situations.  Your
        // application must handle these cases at least somewhat gracefully.  See
        // HelloAR Java sample code for reasonable behavior.
        HwArEnginesApk_requestInstall(env_, activity_, user_requested_install, &install_status);
 
        switch (install_status)
        {
                case HWAR_INSTALL_STATUS_INSTALLED:
                        break;
                case HWAR_INSTALL_STATUS_INSTALL_REQUESTED:
                        arInstallRequested_ = true;
                        return false;
        }
 
        // === ATTENTION!  ATTENTION!  ATTENTION! ===
        // This method can and will fail in user-facing situations.  Your
        // application must handle these cases at least somewhat gracefully.  See
        // HelloAR Java sample code for reasonable behavior.
        UASSERT(HwArSession_create(env_, context_, &arSession_) == HWAR_SUCCESS);
        UASSERT(arSession_);
 
        HwArConfig_create(arSession_, &arConfig_);
        UASSERT(arConfig_);
 
        HwArConfig_setFocusMode(arSession_, arConfig_, HWAR_FOCUS_MODE_FIXED);
        UASSERT(HwArSession_configure(arSession_, arConfig_) == HWAR_SUCCESS);
 
        HwArFrame_create(arSession_, &arFrame_);
        UASSERT(arFrame_);
 
        HwArCameraIntrinsics_create(arSession_, &arCameraIntrinsics_); // May fail?!
        //UASSERT(arCameraIntrinsics_);
 
        HwArPose_create(arSession_, nullptr, &arPose_);
        UASSERT(arPose_);
 
        HwArConfig_setUpdateMode(arSession_, arConfig_, HWAR_UPDATE_MODE_BLOCKING);
 
        deviceTColorCamera_ = opticalRotation;
 
        if (HwArSession_resume(arSession_) != HWAR_SUCCESS)
        {
                UERROR("Cannot resume camera!");
                // In a rare case (such as another camera app launching) the camera may be
                // given to a different app and so may not be available to this app. Handle
                // this properly and recreate the session at the next iteration.
                close();
                return false;
        }
 
        return true;
}
 
void CameraAREngine::close()
{
        UScopeMutex lock(arSessionMutex_);
        if (arCameraIntrinsics_ != nullptr)
        {
                HwArCameraIntrinsics_destroy(arSession_, arCameraIntrinsics_);
        }
        arCameraIntrinsics_ = nullptr;
 
        if(arSession_!= nullptr)
        {
                HwArSession_destroy(arSession_);
        }
        arSession_ = nullptr;
 
        if(arConfig_!= nullptr)
        {
                HwArConfig_destroy(arConfig_);
        }
        arConfig_ = nullptr;
 
        if (arFrame_ != nullptr)
        {
                HwArFrame_destroy(arFrame_);
        }
        arFrame_ = nullptr;
 
        if (arPose_ != nullptr)
        {
                HwArPose_destroy(arPose_);
        }
        arPose_ = nullptr;
 
        CameraMobile::close();
}
 
void CameraAREngine::setScreenRotationAndSize(ScreenRotation colorCameraToDisplayRotation, int width, int height)
{
        CameraMobile::setScreenRotationAndSize(colorCameraToDisplayRotation, width, height);
        if(arSession_)
        {
                int ret = static_cast<int>(colorCameraToDisplayRotation) + 1; // remove 90deg camera rotation
                  if (ret > 3) {
                    ret -= 4;
                  }
 
                HwArSession_setDisplayGeometry(arSession_, ret, width, height);
        }
}
 
SensorData CameraAREngine::updateDataOnRender(Transform & pose)
{
        UScopeMutex lock(arSessionMutex_);
        //LOGI("Capturing image...");
 
        pose.setNull();
        SensorData data;
        if(!arSession_)
        {
                return data;
        }
 
        if(textureId_ == 0)
        {
                glGenTextures(1, &textureId_);
                glBindTexture(GL_TEXTURE_EXTERNAL_OES, textureId_);
                glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
                glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
                glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
                glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
        }
        if(textureId_!=0)
                HwArSession_setCameraTextureName(arSession_, textureId_);
 
        // Update session to get current frame and render camera background.
        if (HwArSession_update(arSession_, arFrame_) != HWAR_SUCCESS) {
                LOGE("CameraAREngine::captureImage() ArSession_update error");
                return data;
        }
 
        // If display rotation changed (also includes view size change), we need to
        // re-query the uv coordinates for the on-screen portion of the camera image.
        int32_t geometry_changed = 0;
        HwArFrame_getDisplayGeometryChanged(arSession_, arFrame_, &geometry_changed);
        if (geometry_changed != 0 || !uvs_initialized_) {
                HwArFrame_transformDisplayUvCoords(
                                arSession_, arFrame_,
                                BackgroundRenderer::kNumVertices*2, BackgroundRenderer_kVerticesView,
                                transformed_uvs_);
                UERROR("uv: (%f,%f) (%f,%f) (%f,%f) (%f,%f)", 
                        transformed_uvs_[0], transformed_uvs_[1],
                        transformed_uvs_[2], transformed_uvs_[3],
                        transformed_uvs_[4], transformed_uvs_[5],
                        transformed_uvs_[6], transformed_uvs_[7]);
                UASSERT(transformed_uvs_);
                uvs_initialized_ = true;
        }
 
        HwArCamera* ar_camera;
        HwArFrame_acquireCamera(arSession_, arFrame_, &ar_camera);
 
        HwArCamera_getViewMatrix(arSession_, ar_camera, glm::value_ptr(viewMatrix_));
        HwArCamera_getProjectionMatrix(arSession_, ar_camera,
                                                           /*near=*/0.1f, /*far=*/100.f,
                                                           glm::value_ptr(projectionMatrix_));
 
        HwArTrackingState camera_tracking_state;
        HwArCamera_getTrackingState(arSession_, ar_camera, &camera_tracking_state);
 
        if(camera_tracking_state == HWAR_TRACKING_STATE_TRACKING)
        {
                // Get calibration parameters
                // FIXME: Hard-coded as getting intrinsics with the api fails
                float fx=492.689667,fy=492.606201, cx=323.594849, cy=234.659744;
                int32_t camWidth=640, camHeight=480;
                //HwArCamera_getImageIntrinsics(arSession_, ar_camera, arCameraIntrinsics_);
                //HwArCameraIntrinsics_getFocalLength(arSession_, arCameraIntrinsics_, &fx, &fy);
                //HwArCameraIntrinsics_getPrincipalPoint(arSession_, arCameraIntrinsics_, &cx, &cy);
                //HwArCameraIntrinsics_getImageDimensions(arSession_, arCameraIntrinsics_, &camWidth, &camHeight);
                LOGI("%f %f %f %f %d %d", fx, fy, cx, cy, camWidth, camHeight);
 
                if(fx > 0 && fy > 0 && camWidth > 0 && camHeight > 0 && cx > 0 && cy > 0)
                {
                        //ArPointCloud * point_cloud;
                        //ArFrame_acquirePointCloud(ar_session_, ar_frame_, &point_cloud);
 
                        HwArImage * image = nullptr;
                        HwArImage * depthImage = nullptr;
                        HwArStatus statusRgb = HwArFrame_acquireCameraImage(arSession_, arFrame_, &image);
                        HwArStatus statusDepth = HwArFrame_acquireDepthImage(arSession_, arFrame_, &depthImage);
                        if(statusRgb == HWAR_SUCCESS && statusDepth == HWAR_SUCCESS)
                        {
                                int64_t timestamp_ns;
                                HwArFrame_getTimestamp(arSession_, arFrame_, &timestamp_ns);
 
                                int planeCount;
                                uint8_t *imageData = nullptr;
                                int len = 0;
                                int stride;
                                int width;
                                int height;
                                const AImage* ndkImageRGB;
                                HwArImage_getNdkImage(image, &ndkImageRGB);
 
                                AImage_getNumberOfPlanes(ndkImageRGB, &planeCount);
                                AImage_getWidth(ndkImageRGB, &width);
                                AImage_getHeight(ndkImageRGB, &height);
                                AImage_getPlaneRowStride(ndkImageRGB, 0, &stride);
                                AImage_getPlaneData(ndkImageRGB, 0, &imageData, &len);
                                LOGI("RGB: width=%d, height=%d, bytes=%d stride=%d planeCount=%d", width, height, len, stride, planeCount);
 
                                cv::Mat outputRGB;
                                if(imageData != nullptr && len>0)
                                {
                                        cv::cvtColor(cv::Mat(height+height/2, width, CV_8UC1, (void*)imageData), outputRGB, cv::COLOR_YUV2BGR_NV21);
                                }
 
                                //Depth
                                const AImage* ndkImageDepth;
                                HwArImage_getNdkImage(depthImage, &ndkImageDepth);
                                AImage_getNumberOfPlanes(ndkImageDepth, &planeCount);
                                AImage_getWidth(ndkImageDepth, &width);
                                AImage_getHeight(ndkImageDepth, &height);
                                AImage_getPlaneRowStride(ndkImageDepth, 0, &stride);
                                AImage_getPlaneData(ndkImageDepth, 0, &imageData, &len);
                                LOGI("Depth: width=%d, height=%d, bytes=%d stride=%d planeCount=%d", width, height, len, stride, planeCount);
 
                                cv::Mat outputDepth(height, width, CV_16UC1);
                                uint16_t *dataShort = (uint16_t *)imageData;
                                for (int y = 0; y < outputDepth.rows; ++y)
                                {
                                        for (int x = 0; x < outputDepth.cols; ++x)
                                        {
                                                uint16_t depthSample = dataShort[y*outputDepth.cols + x];
                                                uint16_t depthRange = (depthSample & 0x1FFF); // first 3 bits are confidence
                                                outputDepth.at<uint16_t>(y,x) = depthRange;
                                        }
                                }
 
                                if(!outputRGB.empty() && !outputDepth.empty())
                                {
                                        double stamp = double(timestamp_ns)/10e8;
                                        CameraModel model = CameraModel(fx, fy, cx, cy, deviceTColorCamera_, 0, cv::Size(camWidth, camHeight));
                                        data = SensorData(outputRGB, outputDepth, model, 0, stamp);
 
                                        // pose in OpenGL coordinates
                                        float pose_raw[7];
                                        HwArCamera_getPose(arSession_, ar_camera, arPose_);
                                        HwArPose_getPoseRaw(arSession_, arPose_, pose_raw);
                                        pose = Transform(pose_raw[4], pose_raw[5], pose_raw[6], pose_raw[0], pose_raw[1], pose_raw[2], pose_raw[3]);
                                        if(pose.isNull())
                                        {
                                                LOGE("CameraAREngine: Pose is null");
                                        }
                                        else
                                        {
                                                pose = rtabmap::rtabmap_world_T_opengl_world * pose * rtabmap::opengl_world_T_rtabmap_world;
                                                this->poseReceived(pose, stamp);
                                        }
                                }
                        }
                        else
                        {
                                LOGE("CameraAREngine: failed to get rgb image (status=%d %d)", (int)statusRgb, (int)statusDepth);
                        }
 
                        HwArImage_release(image);
                        HwArImage_release(depthImage);
                }
                else
                {
                        LOGE("Invalid intrinsics!");
                }
        }
 
        HwArCamera_release(ar_camera);
        return data;
 
}
 
} /* namespace rtabmap */