| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "android/camera/camera-virtualscene-utils.h" |
| |
| #define VIRTUALSCENE_PIXEL_FORMAT V4L2_PIX_FMT_RGB32 |
| |
| namespace android { |
| namespace virtualscene { |
| |
| RenderedCameraDevice::RenderedCameraDevice( |
| std::unique_ptr<CameraRenderer> renderer) |
| : renderer(std::move(renderer)) { |
| mHeader.opaque = this; |
| } |
| |
| RenderedCameraDevice::~RenderedCameraDevice() { |
| stopCapturing(); |
| } |
| |
| int RenderedCameraDevice::startCapturing(uint32_t pixelFormat, |
| int frameWidth, |
| int frameHeight) { |
| VLOG(camera) << "Start capturing at " << frameWidth << " x " << frameHeight; |
| |
| mFramebufferData.resize(4 * frameWidth * frameHeight); |
| |
| mFramebufferWidth = frameWidth; |
| mFramebufferHeight = frameHeight; |
| |
| bool succeeded = false; |
| if (initializeEgl()) { |
| auto context = makeEglCurrent(); |
| if (context.isValid()) { |
| if (renderer->initialize(mGles2, frameWidth, frameHeight)) { |
| succeeded = true; |
| } else { |
| LOG(ERROR) << "Camera Renderer initialize failed"; |
| } |
| } |
| } |
| |
| if (!succeeded) { |
| stopCapturing(); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| // Resets camera device after capturing. |
| // Since new capture request may require different frame dimensions we must |
| // reset camera device by reopening its handle. Otherwise attempts to set up new |
| // frame properties (different from the previous one) may fail. |
| void RenderedCameraDevice::stopCapturing() { |
| if (mEglInitialized) { |
| // Only call makeEglCurrent if egl is initialized, to avoid an infinite |
| // loop when eglMakeCurrent fails. |
| auto context = makeEglCurrent(); |
| if (context.isValid()) { |
| renderer->uninitialize(); |
| } |
| } |
| |
| if (mEglDispatch && mEglDisplay != EGL_NO_DISPLAY) { |
| mEglDispatch->eglDestroySurface(mEglDisplay, mEglSurface); |
| mEglDispatch->eglDestroyContext(mEglDisplay, mEglContext); |
| // Don't eglTerminate the display, we don't own the instance. |
| mEglDisplay = EGL_NO_DISPLAY; |
| } |
| |
| mFramebufferData.clear(); |
| mFramebufferData.shrink_to_fit(); |
| mFramebufferWidth = 0; |
| mFramebufferHeight = 0; |
| |
| mEglInitialized = false; |
| } |
| |
| int RenderedCameraDevice::readFrame(ClientFrame* resultFrame, |
| float rScale, |
| float gScale, |
| float bScale, |
| float expComp) { |
| auto context = makeEglCurrent(); |
| if (!context.isValid()) { |
| return -1; |
| } |
| |
| resultFrame->frame_time = renderer->render(); |
| mEglDispatch->eglSwapBuffers(mEglDisplay, mEglSurface); |
| mGles2->glReadPixels(0, 0, mFramebufferWidth, mFramebufferHeight, GL_RGBA, |
| GL_UNSIGNED_BYTE, mFramebufferData.data()); |
| |
| // Convert frame to the receiving buffers. |
| return convert_frame(mFramebufferData.data(), VIRTUALSCENE_PIXEL_FORMAT, |
| mFramebufferData.size(), mFramebufferWidth, |
| mFramebufferHeight, resultFrame, rScale, gScale, |
| bScale, expComp); |
| } |
| |
| bool RenderedCameraDevice::initializeEgl() { |
| mEglDispatch = emugl::LazyLoadedEGLDispatch::get(); |
| mGles2 = emugl::LazyLoadedGLESv2Dispatch::get(); |
| mEglDisplay = mEglDispatch->eglGetDisplay(EGL_DEFAULT_DISPLAY); |
| |
| if (mEglDisplay == EGL_NO_DISPLAY) { |
| LOG(ERROR) << "eglGetDisplay failed, error " |
| << mEglDispatch->eglGetError(); |
| return false; |
| } |
| |
| EGLint eglMaj = 0; |
| EGLint eglMin = 0; |
| |
| // Try to initialize EGL display. |
| // Initializing an already-initialized display is OK. |
| if (mEglDispatch->eglInitialize(mEglDisplay, &eglMaj, &eglMin) == |
| EGL_FALSE) { |
| LOG(ERROR) << "eglInitialize failed, error " |
| << mEglDispatch->eglGetError(); |
| return false; |
| } |
| |
| // Get an EGL config. |
| const EGLint attribs[] = {EGL_SURFACE_TYPE, |
| EGL_PBUFFER_BIT, |
| EGL_RENDERABLE_TYPE, |
| EGL_OPENGL_ES_BIT, |
| EGL_BLUE_SIZE, |
| 8, |
| EGL_GREEN_SIZE, |
| 8, |
| EGL_RED_SIZE, |
| 8, |
| EGL_DEPTH_SIZE, |
| 16, |
| EGL_NONE}; |
| EGLint numConfig = 0; |
| EGLConfig eglConfig; |
| EGLBoolean chooseResult = mEglDispatch->eglChooseConfig( |
| mEglDisplay, attribs, &eglConfig, 1, &numConfig); |
| if (chooseResult == EGL_FALSE || numConfig < 1) { |
| LOG(ERROR) << "eglChooseConfig failed, error " |
| << mEglDispatch->eglGetError(); |
| return false; |
| } |
| |
| // Create a context. |
| const EGLint contextAttribs[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE}; |
| mEglContext = mEglDispatch->eglCreateContext( |
| mEglDisplay, eglConfig, EGL_NO_CONTEXT, contextAttribs); |
| if (mEglContext == EGL_NO_CONTEXT) { |
| LOG(ERROR) << "eglCreateContext failed, error " |
| << mEglDispatch->eglGetError(); |
| return false; |
| } |
| |
| // Finally, create a window surface associated with this widget. |
| const EGLint pbufferAttribs[] = {EGL_WIDTH, mFramebufferWidth, EGL_HEIGHT, |
| mFramebufferHeight, EGL_NONE}; |
| mEglSurface = mEglDispatch->eglCreatePbufferSurface(mEglDisplay, eglConfig, |
| pbufferAttribs); |
| if (mEglSurface == EGL_NO_SURFACE) { |
| LOG(ERROR) << "eglCreatePbufferSurface failed, error " |
| << mEglDispatch->eglGetError(); |
| return false; |
| } |
| |
| mEglInitialized = true; |
| return true; |
| } |
| |
| ScopedEglContext RenderedCameraDevice::makeEglCurrent() { |
| const EGLBoolean result = mEglDispatch->eglMakeCurrent( |
| mEglDisplay, mEglSurface, mEglSurface, mEglContext); |
| if (result == EGL_FALSE) { |
| LOG(ERROR) << "eglMakeCurrent failed, error " |
| << mEglDispatch->eglGetError(); |
| |
| // Explicitly set mEglInitialized to false here to avoid an infinite |
| // loop with stopCapturing. |
| mEglInitialized = false; |
| stopCapturing(); |
| |
| // Return an empty ScopedEglContext because we failed to call |
| // eglMakeCurrent. |
| return ScopedEglContext(nullptr, EGL_NO_DISPLAY); |
| } |
| |
| return ScopedEglContext(mEglDispatch, mEglDisplay); |
| } |
| |
| } // namespace virtualscene |
| } // namespace android |