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feat: Skia for Android (#1731)

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* feat: Call Skia Renderer

* Use default NativePreviewView for Skia

* Render to separate FBO

* It appears once

* Refactor a lot lol

* Pass width/height

* Read width/heights

* Update SkiaRenderer.cpp

* Read stencil/samples

* Use switch for target

* Clear full red

* Update VideoPipeline.cpp

* fix: Use `BorrowTextureFrom` instead of `AdoptTextureFrom`

* Get it to work

* Draw Camera Frame again (only works for first frame)

* glDisable(GL_BLEND)

* Use Frame Buffer again

* Simplify Skia offscreen surface creation

* fix: Get it to kinda work?

* fix: Remove `sampler2D` shader

Only the EXTERNAL_OES one kinda works

* Revert "fix: Remove `sampler2D` shader"

This reverts commit bf241a82f440f5a442f23a2b10329b813e7cdb3e.

* Revert "fix: Get it to kinda work?"

This reverts commit ea6a8784ad8dc7d05e8076591874f021b51dd84a.

* fix: Use Skia for rendering

* Simplify drawing code a lot

* Clean up drawing loop a bit more

* Some docs

* Update SkiaRenderer.cpp

* Surface

* try to use Matrix

* Use BottomLeft as a surface origin again

* Get actual surface dimensions

* Use 1x1 pbuffer instead

* Update SkiaRenderer.cpp

* Update SkiaRenderer.cpp

* feat: Implement Skia Frame Processor (#1735)

* feat: Implement JS Skia Frame Processor

* Update SkiaRenderer.cpp

* push

* Create Frame from C++

* compile

* Compile

* Update VideoPipeline.cpp

* Fix JNI local ref

* Use `HardwareBuffer` for implementation

* feat: Custom `Frame` implementation that uses CPU `ByteBuffer` (#1736)

* feat: Implement JS Skia Frame Processor

* Update SkiaRenderer.cpp

* push

* Create Frame from C++

* compile

* Compile

* Update VideoPipeline.cpp

* Fix JNI local ref

* Use `HardwareBuffer` for implementation

* try: Try to just create a CPU based ByteBuffer

* fix: Fix Java Type

* fix remaining errors

* try fixing FrameFactory

* Use `free`

* fix: Fix scene mode crash on some emulators

* fix: Fix scene mode crash on some emulators

* Fix getting pixels

* fix: Fix buffer not being freed

* Add some docs to `Frame`

* Test Skia again

* Use `getCurrentPresentationTime()`

* Remove `FrameFactory.cpp`

* Update VideoPipeline.h

* Update VideoPipeline.cpp
This commit is contained in:
Marc Rousavy 2023-09-01 10:43:19 +02:00 committed by GitHub
parent 6bbb44d541
commit a7c137da07
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
47 changed files with 1099 additions and 962 deletions
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14
android/CMakeLists.txt
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@ -12,7 +12,7 @@ find_package(ReactAndroid REQUIRED CONFIG)
find_package(fbjni REQUIRED CONFIG)
find_library(LOG_LIB log)
add_definitions(-DVISION_CAMERA_ENABLE_FRAME_PROCESSORS=${ENABLE_FRAME_PROCESSORS} -DVISION_CAMERA_ENABLE_SKIA=${ENABLE_SKIA})
add_definitions(-DVISION_CAMERA_ENABLE_FRAME_PROCESSORS=${ENABLE_FRAME_PROCESSORS} -DVISION_CAMERA_ENABLE_SKIA=${ENABLE_SKIA} -DEGL_EGLEXT_PROTOTYPES=1)
# Add react-native-vision-camera sources
@ -37,6 +37,9 @@ add_library(
src/main/cpp/frameprocessor/java-bindings/JVisionCameraScheduler.cpp
# Skia Frame Processor
src/main/cpp/skia/SkiaRenderer.cpp
src/main/cpp/skia/JSkiaFrameProcessor.cpp
src/main/cpp/skia/DrawableFrameHostObject.cpp
src/main/cpp/skia/VisionCameraSkiaContext.cpp
)
# Header Search Paths (includes)
@ -48,6 +51,7 @@ target_include_directories(
"src/main/cpp/frameprocessor"
"src/main/cpp/frameprocessor/java-bindings"
"src/main/cpp/skia"
"src/main/cpp/skia/java-bindings"
"${NODE_MODULES_DIR}/react-native/ReactCommon"
"${NODE_MODULES_DIR}/react-native/ReactCommon/callinvoker"
"${NODE_MODULES_DIR}/react-native/ReactAndroid/src/main/jni/react/turbomodule" # <-- CallInvokerHolder JNI wrapper
@ -97,16 +101,18 @@ if(ENABLE_FRAME_PROCESSORS)
target_include_directories(
${PACKAGE_NAME}
PRIVATE
"${RNSKIA_PATH}/cpp/api/"
"${RNSKIA_PATH}/cpp/jsi/"
"${RNSKIA_PATH}/cpp/rnskia/"
"${RNSKIA_PATH}/cpp/skia"
"${RNSKIA_PATH}/cpp/skia/include/"
"${RNSKIA_PATH}/cpp/skia/include/config/"
"${RNSKIA_PATH}/cpp/skia/include/core/"
"${RNSKIA_PATH}/cpp/skia/include/effects/"
"${RNSKIA_PATH}/cpp/skia/include/utils/"
"${RNSKIA_PATH}/cpp/skia/include/pathops/"
"${RNSKIA_PATH}/cpp/skia/modules/"
# "${RNSKIA_PATH}/cpp/skia/modules/skparagraph/include/"
"${RNSKIA_PATH}/cpp/skia/include/"
"${RNSKIA_PATH}/cpp/skia"
"${RNSKIA_PATH}/cpp/utils/"
)
target_link_libraries(

66
android/src/main/cpp/OpenGLContext.cpp
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@ -10,18 +10,14 @@
#include <android/native_window.h>
#include <android/log.h>
#include <chrono>
#include "OpenGLError.h"
namespace vision {
std::shared_ptr<OpenGLContext> OpenGLContext::CreateWithOffscreenSurface(int width, int height) {
return std::unique_ptr<OpenGLContext>(new OpenGLContext(width, height));
}
OpenGLContext::OpenGLContext(int width, int height) {
_width = width;
_height = height;
std::shared_ptr<OpenGLContext> OpenGLContext::CreateWithOffscreenSurface() {
return std::unique_ptr<OpenGLContext>(new OpenGLContext());
}
OpenGLContext::~OpenGLContext() {
@ -67,10 +63,10 @@ void OpenGLContext::ensureOpenGL() {
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing EGLConfig..");
EGLint attributes[] = {EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_ALPHA_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 0,
EGL_STENCIL_SIZE, 0,
EGL_NONE};
@ -90,9 +86,9 @@ void OpenGLContext::ensureOpenGL() {
// EGLSurface
if (offscreenSurface == EGL_NO_SURFACE) {
// If we don't have a surface at all
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing %i x %i offscreen pbuffer EGLSurface..", _width, _height);
EGLint attributes[] = {EGL_WIDTH, _width,
EGL_HEIGHT, _height,
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing 1x1 offscreen pbuffer EGLSurface..");
EGLint attributes[] = {EGL_WIDTH, 1,
EGL_HEIGHT, 1,
EGL_NONE};
offscreenSurface = eglCreatePbufferSurface(display, config, attributes);
if (offscreenSurface == EGL_NO_SURFACE) throw OpenGLError("Failed to create OpenGL Surface!");
@ -116,7 +112,12 @@ void OpenGLContext::use(EGLSurface surface) {
// 3. Caller can now render to this surface
}
GLuint OpenGLContext::createTexture() {
void OpenGLContext::flush() const {
bool successful = eglSwapBuffers(display, eglGetCurrentSurface(EGL_DRAW));
if (!successful || eglGetError() != EGL_SUCCESS) throw OpenGLError("Failed to swap OpenGL buffers!");
}
OpenGLTexture OpenGLContext::createTexture(OpenGLTexture::Type type, int width, int height) {
// 1. Make sure the OpenGL context is initialized
this->ensureOpenGL();
@ -127,7 +128,42 @@ GLuint OpenGLContext::createTexture() {
GLuint textureId;
glGenTextures(1, &textureId);
return textureId;
GLenum target;
switch (type) {
case OpenGLTexture::Type::ExternalOES:
target = GL_TEXTURE_EXTERNAL_OES;
break;
case OpenGLTexture::Type::Texture2D:
target = GL_TEXTURE_2D;
break;
default:
throw std::runtime_error("Invalid OpenGL Texture Type!");
}
glBindTexture(target, textureId);
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
return {
.id = textureId,
.target = target,
.width = width,
.height = height
};
}
void OpenGLContext::getPixelsOfTexture(const OpenGLTexture& texture, size_t* outSize, uint8_t** outPixels) {
glActiveTexture(GL_TEXTURE0);
glBindTexture(texture.target, texture.id);
glReadPixels(0, 0, texture.width, texture.height, GL_RGBA, GL_UNSIGNED_BYTE, *outPixels);
// height * width * components per pixel (4 for RGBA) * size of one number (byte)
*outSize = texture.height * texture.width * 4 * sizeof(uint8_t);
}
long OpenGLContext::getCurrentPresentationTime() {
auto now = std::chrono::steady_clock::now();
auto duration = now.time_since_epoch();
long long milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
return static_cast<long>(milliseconds);
}
} // namespace vision

25
android/src/main/cpp/OpenGLContext.h
View File

@ -6,9 +6,11 @@
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include "OpenGLTexture.h"
#include <memory>
#include <functional>
#include <chrono>
#include "PassThroughShader.h"
@ -24,7 +26,7 @@ class OpenGLContext {
* Create a new instance of the OpenGLContext that draws to an off-screen PixelBuffer surface.
* This will not perform any OpenGL operations yet, and is therefore safe to call from any Thread.
*/
static std::shared_ptr<OpenGLContext> CreateWithOffscreenSurface(int width, int height);
static std::shared_ptr<OpenGLContext> CreateWithOffscreenSurface();
/**
* Destroy the OpenGL Context. This needs to be called on the same thread that `use()` was called.
*/
@ -41,10 +43,25 @@ class OpenGLContext {
*/
void use();
/**
* Flushes all drawing operations by swapping the buffers and submitting the Frame to the GPU
*/
void flush() const;
/**
* Create a new texture on this context
*/
GLuint createTexture();
OpenGLTexture createTexture(OpenGLTexture::Type type, int width, int height);
/**
* Gets the pixels as CPU accessible memory of the given input texture
*/
void getPixelsOfTexture(const OpenGLTexture& texture, size_t* outSize, uint8_t** outPixels);
/**
* Gets the current presentation time for this OpenGL surface.
*/
long getCurrentPresentationTime();
public:
EGLDisplay display = EGL_NO_DISPLAY;
@ -53,13 +70,13 @@ class OpenGLContext {
EGLConfig config = nullptr;
private:
int _width = 0, _height = 0;
explicit OpenGLContext(int width, int height);
explicit OpenGLContext() = default;
void destroy();
void ensureOpenGL();
private:
PassThroughShader _passThroughShader;
std::chrono::time_point<std::chrono::system_clock> _startTime;
private:
static constexpr auto TAG = "OpenGLContext";

9
android/src/main/cpp/OpenGLError.h
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@ -4,8 +4,6 @@
#pragma once
#if VISION_CAMERA_ENABLE_SKIA
#include <string>
#include <stdexcept>
#include <GLES2/gl2.h>
@ -23,8 +21,11 @@ inline std::string getEglErrorIfAny() {
class OpenGLError: public std::runtime_error {
public:
explicit OpenGLError(const std::string&& message): std::runtime_error(message + getEglErrorIfAny()) {}
static inline void checkIfError(const std::string&& message) {
auto error = getEglErrorIfAny();
if (error.length() > 0) throw std::runtime_error(message + error);
}
};
} // namespace vision
#endif

33
android/src/main/cpp/OpenGLRenderer.cpp
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@ -43,32 +43,35 @@ void OpenGLRenderer::destroy() {
}
}
void OpenGLRenderer::renderTextureToSurface(GLuint textureId, float* transformMatrix) {
EGLSurface OpenGLRenderer::getEGLSurface() {
if (_surface == EGL_NO_SURFACE) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Creating Window Surface...");
_context->use();
_surface = eglCreateWindowSurface(_context->display, _context->config, _outputSurface, nullptr);
}
return _surface;
}
// 1. Activate the OpenGL context for this surface
_context->use(_surface);
void OpenGLRenderer::renderTextureToSurface(const OpenGLTexture& texture, float* transformMatrix) {
// 1. Get (or create) the OpenGL EGLSurface which is the window render target (Android Surface)
EGLSurface surface = getEGLSurface();
// 2. Set the viewport for rendering
// 2. Activate the OpenGL context for this surface
_context->use(surface);
OpenGLError::checkIfError("Failed to use context!");
// 3. Set the viewport for rendering
glViewport(0, 0, _width, _height);
glDisable(GL_BLEND);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
// 3. Bind the input texture
glBindTexture(GL_TEXTURE_EXTERNAL_OES, textureId);
glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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);
// 4. Draw it using the pass-through shader which binds the texture and applies transforms
_passThroughShader.draw(texture, transformMatrix);
// 4. Draw it using the pass-through shader which also applies transforms
_passThroughShader.draw(textureId, transformMatrix);
// 5. Swap buffers to pass it to the window surface
eglSwapBuffers(_context->display, _surface);
// 5 Swap buffers to pass it to the window surface
_context->flush();
OpenGLError::checkIfError("Failed to render Frame to Surface!");
}
} // namespace vision

9
android/src/main/cpp/OpenGLRenderer.h
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@ -29,9 +29,9 @@ class OpenGLRenderer {
~OpenGLRenderer();
/**
* Renders the given Texture ID to the Surface
* Renders the given Texture to the Surface
*/
void renderTextureToSurface(GLuint textureId, float* transformMatrix);
void renderTextureToSurface(const OpenGLTexture& texture, float* transformMatrix);
/**
* Destroys the OpenGL context. This needs to be called on the same thread that `use()` was called.
@ -39,6 +39,11 @@ class OpenGLRenderer {
*/
void destroy();
/**
* Gets the EGLSurface (window surface) that this OpenGL renderer is configured to render to.
*/
EGLSurface getEGLSurface();
private:
explicit OpenGLRenderer(std::shared_ptr<OpenGLContext> context, ANativeWindow* surface);

22
android/src/main/cpp/OpenGLTexture.h Normal file
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@ -0,0 +1,22 @@
//
// Created by Marc Rousavy on 30.08.23.
//
#pragma once
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <stdexcept>
struct OpenGLTexture {
enum Type { Texture2D, ExternalOES };
// The ID of the texture as returned in glGenTextures(..)
GLuint id;
// GL_TEXTURE_2D or GL_TEXTURE_EXTERNAL_OES
GLenum target;
// Width and height of the texture
int width = 0;
int height = 0;
};

39
android/src/main/cpp/PassThroughShader.cpp
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@ -10,29 +10,29 @@
#include "OpenGLError.h"
#include <string>
#include <android/log.h>
namespace vision {
PassThroughShader::~PassThroughShader() {
if (_programId != NO_SHADER) {
glDeleteProgram(_programId);
_programId = NO_SHADER;
}
if (_vertexBuffer != NO_BUFFER) {
glDeleteBuffers(1, &_vertexBuffer);
_vertexBuffer = NO_BUFFER;
}
if (_programId != NO_SHADER) {
glDeleteProgram(_programId);
_programId = NO_SHADER;
}
}
void PassThroughShader::draw(GLuint textureId, float* transformMatrix) {
void PassThroughShader::draw(const OpenGLTexture& texture, float* transformMatrix) {
// 1. Set up Shader Program
if (_programId == NO_SHADER) {
_programId = createProgram();
if (_programId == NO_SHADER || _shaderTarget != texture.target) {
if (_programId != NO_SHADER) {
glDeleteProgram(_programId);
}
_programId = createProgram(texture.target);
glUseProgram(_programId);
if (_vertexParameters.aPosition == NO_POSITION) {
_vertexParameters = {
.aPosition = glGetAttribLocation(_programId, "aPosition"),
.aTexCoord = glGetAttribLocation(_programId, "aTexCoord"),
@ -41,14 +41,18 @@ void PassThroughShader::draw(GLuint textureId, float* transformMatrix) {
_fragmentParameters = {
.uTexture = glGetUniformLocation(_programId, "uTexture"),
};
_shaderTarget = texture.target;
}
glUseProgram(_programId);
// 2. Set up Vertices Buffer
if (_vertexBuffer == NO_BUFFER) {
glGenBuffers(1, &_vertexBuffer);
}
glBindBuffer(GL_ARRAY_BUFFER, _vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(VERTICES), VERTICES, GL_STATIC_DRAW);
}
// 3. Pass all uniforms/attributes for vertex shader
glEnableVertexAttribArray(_vertexParameters.aPosition);
@ -71,7 +75,7 @@ void PassThroughShader::draw(GLuint textureId, float* transformMatrix) {
// 4. Pass texture to fragment shader
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_EXTERNAL_OES, textureId);
glBindTexture(texture.target, texture.id);
glUniform1i(_fragmentParameters.uTexture, 0);
// 5. Draw!
@ -93,18 +97,19 @@ GLuint PassThroughShader::loadShader(GLenum shaderType, const char* shaderCode)
return shader;
}
GLuint PassThroughShader::createProgram() {
GLuint PassThroughShader::createProgram(GLenum textureTarget) {
GLuint vertexShader = loadShader(GL_VERTEX_SHADER, VERTEX_SHADER);
GLuint fragmentShader = loadShader(GL_FRAGMENT_SHADER, FRAGMENT_SHADER);
auto fragmentShaderCode = textureTarget == GL_TEXTURE_EXTERNAL_OES ? FRAGMENT_SHADER_EXTERNAL_TEXTURE : FRAGMENT_SHADER;
GLuint fragmentShader = loadShader(GL_FRAGMENT_SHADER, fragmentShaderCode);
GLuint program = glCreateProgram();
if (program == 0) throw OpenGLError("Failed to create pass-through program!");
glAttachShader(program, vertexShader);
if (glGetError() != GL_NO_ERROR) throw OpenGLError("Failed to attach Vertex Shader!");
OpenGLError::checkIfError("Failed to attach Vertex Shader!");
glAttachShader(program, fragmentShader);
if (glGetError() != GL_NO_ERROR) throw OpenGLError("Failed to attach Fragment Shader!");
OpenGLError::checkIfError("Failed to attach Fragment Shader!");
glLinkProgram(program);
GLint linkStatus = GL_FALSE;

20
android/src/main/cpp/PassThroughShader.h
View File

@ -7,11 +7,14 @@
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include "OpenGLTexture.h"
namespace vision {
#define NO_SHADER 0
#define NO_POSITION 0
#define NO_BUFFER 0
#define NO_SHADER_TARGET 0
struct Vertex {
GLfloat position[2];
@ -26,15 +29,16 @@ class PassThroughShader {
/**
* Draw the texture using this shader.
*/
void draw(GLuint textureId, float* transformMatrix);
void draw(const OpenGLTexture& texture, float* transformMatrix);
private:
// Loading
static GLuint loadShader(GLenum shaderType, const char* shaderCode);
static GLuint createProgram();
static GLuint createProgram(GLenum textureTarget);
private:
// Parameters
// Shader program in memory
GLenum _shaderTarget = NO_SHADER_TARGET;
GLuint _programId = NO_SHADER;
GLuint _vertexBuffer = NO_BUFFER;
struct VertexParameters {
@ -67,7 +71,17 @@ class PassThroughShader {
}
)";
static constexpr char FRAGMENT_SHADER[] = R"(
precision mediump float;
varying vec2 vTexCoord;
uniform sampler2D uTexture;
void main() {
gl_FragColor = texture2D(uTexture, vTexCoord);
}
)";
static constexpr char FRAGMENT_SHADER_EXTERNAL_TEXTURE[] = R"(
#extension GL_OES_EGL_image_external : require
precision mediump float;
varying vec2 vTexCoord;
uniform samplerExternalOES uTexture;

149
android/src/main/cpp/VideoPipeline.cpp
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@ -9,6 +9,14 @@
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES/gl.h>
#include <chrono>
#include "OpenGLTexture.h"
#include "JFrameProcessor.h"
#include "JSkiaFrameProcessor.h"
namespace vision {
@ -19,39 +27,28 @@ jni::local_ref<VideoPipeline::jhybriddata> VideoPipeline::initHybrid(jni::alias_
VideoPipeline::VideoPipeline(jni::alias_ref<jhybridobject> jThis, int width, int height): _javaPart(jni::make_global(jThis)) {
_width = width;
_height = height;
_context = OpenGLContext::CreateWithOffscreenSurface(width, height);
_context = OpenGLContext::CreateWithOffscreenSurface();
}
VideoPipeline::~VideoPipeline() {
// 1. Remove output surfaces
removeFrameProcessorOutputSurface();
removeFrameProcessor();
removeRecordingSessionOutputSurface();
removePreviewOutputSurface();
// 2. Delete the input textures
if (_inputTextureId != NO_TEXTURE) {
glDeleteTextures(1, &_inputTextureId);
_inputTextureId = NO_TEXTURE;
if (_inputTexture != std::nullopt) {
glDeleteTextures(1, &_inputTexture->id);
}
// 4. Destroy all surfaces
_previewOutput = nullptr;
_frameProcessorOutput = nullptr;
_recordingSessionOutput = nullptr;
// 5. Destroy the OpenGL context
// 3. Destroy the OpenGL context
_context = nullptr;
}
void VideoPipeline::removeFrameProcessorOutputSurface() {
if (_frameProcessorOutput) _frameProcessorOutput->destroy();
_frameProcessorOutput = nullptr;
void VideoPipeline::removeFrameProcessor() {
_frameProcessor = nullptr;
}
void VideoPipeline::setFrameProcessorOutputSurface(jobject surface) {
// 1. Delete existing output surface
removeFrameProcessorOutputSurface();
// 2. Set new output surface if it is not null
ANativeWindow* window = ANativeWindow_fromSurface(jni::Environment::current(), surface);
_frameProcessorOutput = OpenGLRenderer::CreateWithWindowSurface(_context, window);
void VideoPipeline::setFrameProcessor(jni::alias_ref<JFrameProcessor::javaobject> frameProcessor) {
_frameProcessor = jni::make_global(frameProcessor);
}
void VideoPipeline::removeRecordingSessionOutputSurface() {
@ -73,6 +70,11 @@ void VideoPipeline::removePreviewOutputSurface() {
_previewOutput = nullptr;
}
jni::local_ref<JFrame> VideoPipeline::createFrame() {
static const auto createFrameMethod = javaClassLocal()->getMethod<JFrame()>("createFrame");
return createFrameMethod(_javaPart);
}
void VideoPipeline::setPreviewOutputSurface(jobject surface) {
// 1. Delete existing output surface
removePreviewOutputSurface();
@ -83,48 +85,119 @@ void VideoPipeline::setPreviewOutputSurface(jobject surface) {
}
int VideoPipeline::getInputTextureId() {
if (_inputTextureId != NO_TEXTURE) return static_cast<int>(_inputTextureId);
_inputTextureId = _context->createTexture();
return static_cast<int>(_inputTextureId);
if (_inputTexture == std::nullopt) {
_inputTexture = _context->createTexture(OpenGLTexture::Type::ExternalOES, _width, _height);
}
return static_cast<int>(_inputTexture->id);
}
void VideoPipeline::onBeforeFrame() {
// 1. Activate the offscreen context
_context->use();
glBindTexture(GL_TEXTURE_EXTERNAL_OES, _inputTextureId);
// 2. Prepare the external texture so the Camera can render into it
OpenGLTexture& texture = _inputTexture.value();
glBindTexture(texture.target, texture.id);
}
void VideoPipeline::onFrame(jni::alias_ref<jni::JArrayFloat> transformMatrixParam) {
// Get the OpenGL transform Matrix (transforms, scales, rotations)
// 1. Activate the offscreen context
_context->use();
// 2. Get the OpenGL transform Matrix (transforms, scales, rotations)
float transformMatrix[16];
transformMatrixParam->getRegion(0, 16, transformMatrix);
// 3. Prepare the texture we are going to render
OpenGLTexture& texture = _inputTexture.value();
// 4. Render to all outputs!
auto isSkiaFrameProcessor = _frameProcessor != nullptr && _frameProcessor->isInstanceOf(JSkiaFrameProcessor::javaClassStatic());
if (isSkiaFrameProcessor) {
// 4.1. If we have a Skia Frame Processor, prepare to render to an offscreen surface using Skia
jni::global_ref<JSkiaFrameProcessor::javaobject> skiaFrameProcessor = jni::static_ref_cast<JSkiaFrameProcessor::javaobject>(_frameProcessor);
SkiaRenderer& skiaRenderer = skiaFrameProcessor->cthis()->getSkiaRenderer();
auto drawCallback = [=](SkCanvas* canvas) {
// Create a JFrame instance (this uses queues/recycling)
auto frame = JFrame::create(texture.width,
texture.height,
texture.width * 4,
_context->getCurrentPresentationTime(),
"portrait",
false);
// Fill the Frame with the contents of the GL surface
_context->getPixelsOfTexture(texture,
&frame->cthis()->pixelsSize,
&frame->cthis()->pixels);
// Call the Frame processor with the Frame
frame->cthis()->incrementRefCount();
skiaFrameProcessor->cthis()->call(frame, canvas);
frame->cthis()->decrementRefCount();
};
// 4.2. Render to the offscreen surface using Skia
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering using Skia..");
OpenGLTexture offscreenTexture = skiaRenderer.renderTextureToOffscreenSurface(*_context,
texture,
transformMatrix,
drawCallback);
// 4.3. Now render the result of the offscreen surface to all output surfaces!
if (_previewOutput) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering to Preview..");
_previewOutput->renderTextureToSurface(_inputTextureId, transformMatrix);
}
if (_frameProcessorOutput) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering to FrameProcessor..");
_frameProcessorOutput->renderTextureToSurface(_inputTextureId, transformMatrix);
skiaRenderer.renderTextureToSurface(*_context, offscreenTexture, _previewOutput->getEGLSurface());
}
if (_recordingSessionOutput) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering to RecordingSession..");
_recordingSessionOutput->renderTextureToSurface(_inputTextureId, transformMatrix);
skiaRenderer.renderTextureToSurface(*_context, offscreenTexture, _recordingSessionOutput->getEGLSurface());
}
} else {
// 4.1. If we have a Frame Processor, call it
if (_frameProcessor != nullptr) {
// Create a JFrame instance (this uses queues/recycling)
auto frame = JFrame::create(texture.width,
texture.height,
texture.width * 4,
_context->getCurrentPresentationTime(),
"portrait",
false);
// Fill the Frame with the contents of the GL surface
_context->getPixelsOfTexture(texture,
&frame->cthis()->pixelsSize,
&frame->cthis()->pixels);
// Call the Frame processor with the Frame
frame->cthis()->incrementRefCount();
_frameProcessor->cthis()->call(frame);
frame->cthis()->decrementRefCount();
}
// 4.2. Simply pass-through shader to render the texture to all output EGLSurfaces
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering using pass-through OpenGL Shader..");
if (_previewOutput) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering to Preview..");
_previewOutput->renderTextureToSurface(texture, transformMatrix);
}
if (_recordingSessionOutput) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering to RecordingSession..");
_recordingSessionOutput->renderTextureToSurface(texture, transformMatrix);
}
}
}
void VideoPipeline::registerNatives() {
registerHybrid({
makeNativeMethod("initHybrid", VideoPipeline::initHybrid),
makeNativeMethod("setFrameProcessorOutputSurface", VideoPipeline::setFrameProcessorOutputSurface),
makeNativeMethod("removeFrameProcessorOutputSurface", VideoPipeline::removeFrameProcessorOutputSurface),
makeNativeMethod("setRecordingSessionOutputSurface", VideoPipeline::setRecordingSessionOutputSurface),
makeNativeMethod("removeRecordingSessionOutputSurface", VideoPipeline::removeRecordingSessionOutputSurface),
makeNativeMethod("getInputTextureId", VideoPipeline::getInputTextureId),
makeNativeMethod("setFrameProcessor", VideoPipeline::setFrameProcessor),
makeNativeMethod("removeFrameProcessor", VideoPipeline::removeFrameProcessor),
makeNativeMethod("setPreviewOutputSurface", VideoPipeline::setPreviewOutputSurface),
makeNativeMethod("removePreviewOutputSurface", VideoPipeline::removePreviewOutputSurface),
makeNativeMethod("getInputTextureId", VideoPipeline::getInputTextureId),
makeNativeMethod("setRecordingSessionOutputSurface", VideoPipeline::setRecordingSessionOutputSurface),
makeNativeMethod("removeRecordingSessionOutputSurface", VideoPipeline::removeRecordingSessionOutputSurface),
makeNativeMethod("onBeforeFrame", VideoPipeline::onBeforeFrame),
makeNativeMethod("onFrame", VideoPipeline::onFrame),
});

23
android/src/main/cpp/VideoPipeline.h
View File

@ -8,14 +8,15 @@
#include <fbjni/fbjni.h>
#include <EGL/egl.h>
#include <android/native_window.h>
#include "PassThroughShader.h"
#include "OpenGLRenderer.h"
#include "OpenGLContext.h"
#include <memory>
namespace vision {
#include "OpenGLRenderer.h"
#include "OpenGLContext.h"
#define NO_TEXTURE 0
#include "OpenGLTexture.h"
#include "JFrameProcessor.h"
namespace vision {
using namespace facebook;
@ -32,8 +33,8 @@ class VideoPipeline: public jni::HybridClass<VideoPipeline> {
int getInputTextureId();
// <- Frame Processor output
void setFrameProcessorOutputSurface(jobject surface);
void removeFrameProcessorOutputSurface();
void setFrameProcessor(jni::alias_ref<JFrameProcessor::javaobject> frameProcessor);
void removeFrameProcessor();
// <- MediaRecorder output
void setRecordingSessionOutputSurface(jobject surface);
@ -50,16 +51,20 @@ class VideoPipeline: public jni::HybridClass<VideoPipeline> {
private:
// Private constructor. Use `create(..)` to create new instances.
explicit VideoPipeline(jni::alias_ref<jhybridobject> jThis, int width, int height);
// Creates a new Frame instance which should be filled with data.
jni::local_ref<JFrame> createFrame();
private:
// Input Surface Texture
GLuint _inputTextureId = NO_TEXTURE;
std::optional<OpenGLTexture> _inputTexture;
int _width = 0;
int _height = 0;
// (Optional) Frame Processor that processes frames before they go into output
jni::global_ref<JFrameProcessor::javaobject> _frameProcessor = nullptr;
// Output Contexts
std::shared_ptr<OpenGLContext> _context = nullptr;
std::unique_ptr<OpenGLRenderer> _frameProcessorOutput = nullptr;
std::unique_ptr<OpenGLRenderer> _recordingSessionOutput = nullptr;
std::unique_ptr<OpenGLRenderer> _previewOutput = nullptr;

4
android/src/main/cpp/VisionCamera.cpp
View File

@ -4,7 +4,7 @@
#include "JFrameProcessor.h"
#include "JVisionCameraProxy.h"
#include "VisionCameraProxy.h"
#include "SkiaRenderer.h"
#include "JSkiaFrameProcessor.h"
#include "VideoPipeline.h"
JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *) {
@ -17,7 +17,7 @@ JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *) {
vision::JFrameProcessor::registerNatives();
#endif
#if VISION_CAMERA_ENABLE_SKIA
vision::SkiaRenderer::registerNatives();
vision::JSkiaFrameProcessor::registerNatives();
#endif
});
}

37
android/src/main/cpp/frameprocessor/FrameHostObject.cpp
View File

@ -31,7 +31,6 @@ std::vector<jsi::PropNameID> FrameHostObject::getPropertyNames(jsi::Runtime& rt)
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("width")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("height")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("bytesPerRow")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("planesCount")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("orientation")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("isMirrored")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("timestamp")));
@ -55,7 +54,7 @@ jsi::Value FrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& pr
const jsi::Value* args,
size_t count) -> jsi::Value {
// Increment retain count by one.
this->frame->incrementRefCount();
this->frame->cthis()->incrementRefCount();
return jsi::Value::undefined();
};
return jsi::Function::createFromHostFunction(runtime,
@ -69,7 +68,7 @@ jsi::Value FrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& pr
const jsi::Value* args,
size_t count) -> jsi::Value {
// Decrement retain count by one. If the retain count is zero, the Frame gets closed.
this->frame->decrementRefCount();
this->frame->cthis()->decrementRefCount();
return jsi::Value::undefined();
};
return jsi::Function::createFromHostFunction(runtime,
@ -85,8 +84,8 @@ jsi::Value FrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& pr
if (!this->frame) {
return jsi::String::createFromUtf8(runtime, "[closed frame]");
}
auto width = this->frame->getWidth();
auto height = this->frame->getHeight();
auto width = this->frame->cthis()->getWidth();
auto height = this->frame->cthis()->getHeight();
auto str = std::to_string(width) + " x " + std::to_string(height) + " Frame";
return jsi::String::createFromUtf8(runtime, str);
};
@ -97,11 +96,8 @@ jsi::Value FrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& pr
const jsi::Value& thisArg,
const jsi::Value* args,
size_t count) -> jsi::Value {
auto buffer = this->frame->toByteBuffer();
if (!buffer->isDirect()) {
throw std::runtime_error("Failed to get byte content of Frame - array is not direct ByteBuffer!");
}
auto size = buffer->getDirectSize();
size_t size = frame->cthis()->pixelsSize;
uint8_t* pixels = frame->cthis()->pixels;
static constexpr auto ARRAYBUFFER_CACHE_PROP_NAME = "__frameArrayBufferCache";
if (!runtime.global().hasProperty(runtime, ARRAYBUFFER_CACHE_PROP_NAME)) {
@ -119,7 +115,7 @@ jsi::Value FrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& pr
// directly write to C++ JSI ArrayBuffer
auto destinationBuffer = arrayBuffer.data(runtime);
memcpy(destinationBuffer, buffer->getDirectAddress(), sizeof(uint8_t) * size);
memcpy(destinationBuffer, pixels, sizeof(uint8_t) * size);
return arrayBuffer;
};
@ -127,33 +123,30 @@ jsi::Value FrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& pr
}
if (name == "isValid") {
return jsi::Value(this->frame && this->frame->getIsValid());
return jsi::Value(this->frame && this->frame->cthis()->getIsValid());
}
if (name == "width") {
return jsi::Value(this->frame->getWidth());
return jsi::Value(this->frame->cthis()->getWidth());
}
if (name == "height") {
return jsi::Value(this->frame->getHeight());
return jsi::Value(this->frame->cthis()->getHeight());
}
if (name == "isMirrored") {
return jsi::Value(this->frame->getIsMirrored());
return jsi::Value(this->frame->cthis()->getIsMirrored());
}
if (name == "orientation") {
auto string = this->frame->getOrientation();
auto string = this->frame->cthis()->getOrientation();
return jsi::String::createFromUtf8(runtime, string->toStdString());
}
if (name == "pixelFormat") {
auto string = this->frame->getPixelFormat();
auto string = this->frame->cthis()->getPixelFormat();
return jsi::String::createFromUtf8(runtime, string->toStdString());
}
if (name == "timestamp") {
return jsi::Value(static_cast<double>(this->frame->getTimestamp()));
return jsi::Value(static_cast<double>(this->frame->cthis()->getTimestamp()));
}
if (name == "bytesPerRow") {
return jsi::Value(this->frame->getBytesPerRow());
}
if (name == "planesCount") {
return jsi::Value(this->frame->getPlanesCount());
return jsi::Value(this->frame->cthis()->getBytesPerRow());
}
// fallback to base implementation

2
android/src/main/cpp/frameprocessor/FrameHostObject.h
View File

@ -26,7 +26,7 @@ class JSI_EXPORT FrameHostObject : public jsi::HostObject {
std::vector<jsi::PropNameID> getPropertyNames(jsi::Runtime &rt) override;
public:
jni::global_ref<JFrame> frame;
jni::global_ref<JFrame::javaobject> frame;
};
} // namespace vision

10
android/src/main/cpp/frameprocessor/JSIJNIConversion.cpp
View File

@ -111,10 +111,10 @@ jsi::Value JSIJNIConversion::convertJNIObjectToJSIValue(jsi::Runtime &runtime, c
return jsi::String::createFromUtf8(runtime, object->toString());
} else if (object->isInstanceOf(JList<jobject>::javaClassStatic())) {
} else if (object->isInstanceOf(jni::JList<jobject>::javaClassStatic())) {
// List<E>
auto arrayList = static_ref_cast<JList<jobject>>(object);
auto arrayList = jni::static_ref_cast<jni::JList<jobject>>(object);
auto size = arrayList->size();
auto result = jsi::Array(runtime, size);
@ -125,10 +125,10 @@ jsi::Value JSIJNIConversion::convertJNIObjectToJSIValue(jsi::Runtime &runtime, c
}
return result;
} else if (object->isInstanceOf(JMap<jstring, jobject>::javaClassStatic())) {
} else if (object->isInstanceOf(jni::JMap<jstring, jobject>::javaClassStatic())) {
// Map<K, V>
auto map = static_ref_cast<JMap<jstring, jobject>>(object);
auto map = jni::static_ref_cast<jni::JMap<jstring, jobject>>(object);
auto result = jsi::Object(runtime);
for (const auto& entry : *map) {
@ -140,7 +140,7 @@ jsi::Value JSIJNIConversion::convertJNIObjectToJSIValue(jsi::Runtime &runtime, c
return result;
} else if (object->isInstanceOf(JFrame::javaClassStatic())) {
// Frame
auto frame = static_ref_cast<JFrame>(object);
auto frame = jni::static_ref_cast<JFrame::javaobject>(object);
// box into HostObject
auto hostObject = std::make_shared<FrameHostObject>(frame);

104
android/src/main/cpp/frameprocessor/java-bindings/JFrame.cpp
View File

@ -11,71 +11,85 @@
namespace vision {
using namespace facebook;
using namespace jni;
int JFrame::getWidth() const {
static const auto getWidthMethod = getClass()->getMethod<jint()>("getWidth");
return getWidthMethod(self());
void JFrame::registerNatives() {
registerHybrid({
makeNativeMethod("getWidth", JFrame::getWidth),
makeNativeMethod("getHeight", JFrame::getHeight),
makeNativeMethod("getBytesPerRow", JFrame::getBytesPerRow),
makeNativeMethod("getTimestamp", JFrame::getTimestamp),
makeNativeMethod("getOrientation", JFrame::getOrientation),
makeNativeMethod("getIsMirrored", JFrame::getIsMirrored),
makeNativeMethod("getPixelFormat", JFrame::getPixelFormat),
makeNativeMethod("getByteBuffer", JFrame::getByteBuffer),
makeNativeMethod("getIsValid", JFrame::getIsValid),
});
}
int JFrame::getHeight() const {
static const auto getWidthMethod = getClass()->getMethod<jint()>("getHeight");
return getWidthMethod(self());
jni::local_ref<JFrame::javaobject> JFrame::create(int width,
int height,
int bytesPerRow,
long timestamp,
const std::string& orientation,
bool isMirrored) {
return newObjectCxxArgs(width,
height,
bytesPerRow,
timestamp,
orientation,
isMirrored);
}
bool JFrame::getIsValid() const {
static const auto getIsValidMethod = getClass()->getMethod<jboolean()>("getIsValid");
return getIsValidMethod(self());
JFrame::JFrame(int width,
int height,
int bytesPerRow,
long timestamp,
const std::string& orientation,
bool isMirrored) {
_width = width;
_height = height;
_bytesPerRow = bytesPerRow;
_timestamp = timestamp;
_orientation = orientation;
_isMirrored = isMirrored;
_refCount = 0;
pixelsSize = height * bytesPerRow;
pixels = (uint8_t*) malloc(pixelsSize);
}
bool JFrame::getIsMirrored() const {
static const auto getIsMirroredMethod = getClass()->getMethod<jboolean()>("getIsMirrored");
return getIsMirroredMethod(self());
JFrame::~JFrame() noexcept {
close();
}
jlong JFrame::getTimestamp() const {
static const auto getTimestampMethod = getClass()->getMethod<jlong()>("getTimestamp");
return getTimestampMethod(self());
bool JFrame::getIsValid() {
return _refCount > 0 && !_isClosed;
}
local_ref<JString> JFrame::getOrientation() const {
static const auto getOrientationMethod = getClass()->getMethod<JString()>("getOrientation");
return getOrientationMethod(self());
}
local_ref<JString> JFrame::getPixelFormat() const {
static const auto getPixelFormatMethod = getClass()->getMethod<JString()>("getPixelFormat");
return getPixelFormatMethod(self());
}
int JFrame::getPlanesCount() const {
static const auto getPlanesCountMethod = getClass()->getMethod<jint()>("getPlanesCount");
return getPlanesCountMethod(self());
}
int JFrame::getBytesPerRow() const {
static const auto getBytesPerRowMethod = getClass()->getMethod<jint()>("getBytesPerRow");
return getBytesPerRowMethod(self());
}
local_ref<JByteBuffer> JFrame::toByteBuffer() const {
static const auto toByteBufferMethod = getClass()->getMethod<JByteBuffer()>("toByteBuffer");
return toByteBufferMethod(self());
jni::local_ref<jni::JByteBuffer> JFrame::getByteBuffer() {
if (!getIsValid()) {
[[unlikely]]
throw std::runtime_error("Frame is no longer valid, cannot access getByteBuffer!");
}
return jni::JByteBuffer::wrapBytes(pixels, pixelsSize);
}
void JFrame::incrementRefCount() {
static const auto incrementRefCountMethod = getClass()->getMethod<void()>("incrementRefCount");
incrementRefCountMethod(self());
std::unique_lock lock(_mutex);
_refCount++;
}
void JFrame::decrementRefCount() {
static const auto decrementRefCountMethod = getClass()->getMethod<void()>("decrementRefCount");
decrementRefCountMethod(self());
std::unique_lock lock(_mutex);
_refCount--;
if (_refCount <= 0) {
this->close();
}
}
void JFrame::close() {
static const auto closeMethod = getClass()->getMethod<void()>("close");
closeMethod(self());
_isClosed = true;
free(pixels);
pixels = nullptr;
}
} // namespace vision

65
android/src/main/cpp/frameprocessor/java-bindings/JFrame.h
View File

@ -7,29 +7,70 @@
#include <jni.h>
#include <fbjni/fbjni.h>
#include <fbjni/ByteBuffer.h>
#include <android/hardware_buffer.h>
#include <android/hardware_buffer_jni.h>
#include <mutex>
namespace vision {
using namespace facebook;
using namespace jni;
struct JFrame : public JavaClass<JFrame> {
class JFrame : public jni::HybridClass<JFrame> {
public:
static constexpr auto kJavaDescriptor = "Lcom/mrousavy/camera/frameprocessor/Frame;";
static void registerNatives();
static jni::local_ref<JFrame::javaobject> create(int width,
int height,
int bytesPerRow,
long timestamp,
const std::string& orientation,
bool isMirrored);
~JFrame() noexcept;
protected:
friend HybridBase;
explicit JFrame(int width,
int height,
int bytesPerRow,
long timestamp,
const std::string& orientation,
bool isMirrored);
public:
int getWidth() const;
int getHeight() const;
bool getIsValid() const;
bool getIsMirrored() const;
int getPlanesCount() const;
int getBytesPerRow() const;
jlong getTimestamp() const;
local_ref<JString> getOrientation() const;
local_ref<JString> getPixelFormat() const;
local_ref<JByteBuffer> toByteBuffer() const;
int getWidth() { return _width; }
int getHeight() { return _height; }
int getBytesPerRow() { return _bytesPerRow; }
jlong getTimestamp() { return _timestamp; }
jni::local_ref<jni::JString> getOrientation() { return jni::make_jstring(_orientation); }
bool getIsMirrored() { return _isMirrored; }
// TODO: Can this be something other than RGB?
jni::local_ref<jni::JString> getPixelFormat() { return jni::make_jstring("rgb"); }
bool getIsValid();
jni::local_ref<jni::JByteBuffer> getByteBuffer();
void incrementRefCount();
void decrementRefCount();
void close();
// Backing byte data
uint8_t* pixels = nullptr;
size_t pixelsSize = 0;
private:
// Frame info
int _width = 0;
int _height = 0;
int _bytesPerRow = 0;
long _timestamp = 0;
std::string _orientation = {};
bool _isMirrored = false;
// Ref-counting
int _refCount = 0;
bool _isClosed = false;
std::mutex _mutex;
};
} // namespace vision

3
android/src/main/cpp/frameprocessor/java-bindings/JFrameProcessor.cpp
View File

@ -17,9 +17,6 @@ using namespace facebook;
using namespace jni;
void JFrameProcessor::registerNatives() {
registerHybrid({
makeNativeMethod("call", JFrameProcessor::call)
});
}
using TSelf = jni::local_ref<JFrameProcessor::javaobject>;

19
android/src/main/cpp/frameprocessor/java-bindings/JFrameProcessor.h
View File

@ -21,7 +21,7 @@ namespace vision {
using namespace facebook;
struct JFrameProcessor : public jni::HybridClass<JFrameProcessor> {
class JFrameProcessor : public jni::HybridClass<JFrameProcessor> {
public:
static auto constexpr kJavaDescriptor = "Lcom/mrousavy/camera/frameprocessor/FrameProcessor;";
static void registerNatives();
@ -30,20 +30,25 @@ struct JFrameProcessor : public jni::HybridClass<JFrameProcessor> {
public:
/**
* Call the JS Frame Processor.
* Wrap the Frame in a HostObject and call the Frame Processor.
*/
void call(alias_ref<JFrame::javaobject> frame);
void call(jni::alias_ref<JFrame::javaobject> frame);
private:
// Private constructor. Use `create(..)` to create new instances.
protected:
friend HybridBase;
// C++ only constructor. Use `create(..)` to create new instances.
explicit JFrameProcessor(std::shared_ptr<RNWorklet::JsiWorklet> worklet,
std::shared_ptr<RNWorklet::JsiWorkletContext> context);
JFrameProcessor(const JFrameProcessor &) = delete;
JFrameProcessor &operator=(const JFrameProcessor &) = delete;
private:
protected:
/**
* Call the JS Frame Processor with the given Frame Host Object.
*/
void callWithFrameHostObject(const std::shared_ptr<FrameHostObject>& frameHostObject) const;
private:
friend HybridBase;
std::shared_ptr<RNWorklet::WorkletInvoker> _workletInvoker;
std::shared_ptr<RNWorklet::JsiWorkletContext> _workletContext;
};

7
android/src/main/cpp/frameprocessor/java-bindings/JVisionCameraProxy.cpp
View File

@ -18,6 +18,10 @@
#include <react-native-worklets-core/WKTJsiWorkletContext.h>
#endif
#if VISION_CAMERA_ENABLE_SKIA
#include "JSkiaFrameProcessor.h"
#endif
namespace vision {
using TSelf = local_ref<HybridClass<JVisionCameraProxy>::jhybriddata>;
@ -31,6 +35,7 @@ JVisionCameraProxy::JVisionCameraProxy(const jni::alias_ref<JVisionCameraProxy::
const jni::global_ref<JVisionCameraScheduler::javaobject>& scheduler) {
_javaPart = make_global(javaThis);
_runtime = runtime;
_callInvoker = callInvoker;
#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS
__android_log_write(ANDROID_LOG_INFO, TAG, "Creating Worklet Context...");
@ -84,7 +89,7 @@ void JVisionCameraProxy::setFrameProcessor(int viewTag,
frameProcessor = JFrameProcessor::create(worklet, _workletContext);
} else if (frameProcessorType == "skia-frame-processor") {
#if VISION_CAMERA_ENABLE_SKIA
throw std::runtime_error("system/skia-unavailable: Skia is not yet implemented on Android!");
frameProcessor = JSkiaFrameProcessor::create(worklet, _workletContext, _callInvoker);
#else
throw std::runtime_error("system/skia-unavailable: Skia is not installed!");
#endif

2
android/src/main/cpp/frameprocessor/java-bindings/JVisionCameraProxy.h
View File

@ -36,11 +36,13 @@ class JVisionCameraProxy : public jni::HybridClass<JVisionCameraProxy> {
jni::local_ref<JMap<jstring, jobject>> options);
jsi::Runtime* getJSRuntime() { return _runtime; }
std::shared_ptr<react::CallInvoker> getCallInvoker() { return _callInvoker; }
private:
friend HybridBase;
jni::global_ref<JVisionCameraProxy::javaobject> _javaPart;
jsi::Runtime* _runtime;
std::shared_ptr<react::CallInvoker> _callInvoker;
#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS
std::shared_ptr<RNWorklet::JsiWorkletContext> _workletContext;
#endif

72
android/src/main/cpp/skia/DrawableFrameHostObject.cpp Normal file
View File

@ -0,0 +1,72 @@
//
// Created by Marc Rousavy on 31.08.23.
//
#include "DrawableFrameHostObject.h"
#include <SkCanvas.h>
#include "FrameHostObject.h"
namespace vision {
std::vector<jsi::PropNameID> DrawableFrameHostObject::getPropertyNames(jsi::Runtime& rt) {
auto result = FrameHostObject::getPropertyNames(rt);
// Skia - Render Frame
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("render")));
if (_canvas != nullptr) {
auto canvasPropNames = _canvas->getPropertyNames(rt);
for (auto& prop : canvasPropNames) {
result.push_back(std::move(prop));
}
}
return result;
}
SkRect inscribe(SkSize size, SkRect rect) {
auto halfWidthDelta = (rect.width() - size.width()) / 2.0;
auto halfHeightDelta = (rect.height() - size.height()) / 2.0;
return SkRect::MakeXYWH(rect.x() + halfWidthDelta,
rect.y() + halfHeightDelta, size.width(),
size.height());
}
jsi::Value DrawableFrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& propName) {
auto name = propName.utf8(runtime);
if (name == "render") {
auto render = JSI_HOST_FUNCTION_LAMBDA {
if (_canvas == nullptr) {
throw jsi::JSError(runtime, "Trying to render a Frame without a Skia Canvas! Did you install Skia?");
}
throw std::runtime_error("render() is not yet implemented!");
return jsi::Value::undefined();
};
return jsi::Function::createFromHostFunction(runtime, jsi::PropNameID::forUtf8(runtime, "render"), 1, render);
}
if (name == "isDrawable") {
return jsi::Value(_canvas != nullptr);
}
if (_canvas != nullptr) {
// If we have a Canvas, try to access the property on there.
auto result = _canvas->get(runtime, propName);
if (!result.isUndefined()) {
return result;
}
}
// fallback to base implementation
return FrameHostObject::get(runtime, propName);
}
void DrawableFrameHostObject::invalidateCanvas() {
_canvas = nullptr;
}
} // namespace vision

33
android/src/main/cpp/skia/DrawableFrameHostObject.h Normal file
View File

@ -0,0 +1,33 @@
//
// Created by Marc Rousavy on 31.08.23.
//
#pragma once
#include <jsi/jsi.h>
#include "FrameHostObject.h"
#include "JFrame.h"
#include <SkCanvas.h>
#include <JsiSkCanvas.h>
namespace vision {
using namespace facebook;
class JSI_EXPORT DrawableFrameHostObject: public FrameHostObject {
public:
explicit DrawableFrameHostObject(const jni::alias_ref<JFrame::javaobject>& frame,
std::shared_ptr<RNSkia::JsiSkCanvas> canvas): FrameHostObject(frame), _canvas(canvas) {}
public:
jsi::Value get(jsi::Runtime&, const jsi::PropNameID& name) override;
std::vector<jsi::PropNameID> getPropertyNames(jsi::Runtime& rt) override;
void invalidateCanvas();
private:
std::shared_ptr<RNSkia::JsiSkCanvas> _canvas;
};
} // namespace vision

61
android/src/main/cpp/skia/JSkiaFrameProcessor.cpp Normal file
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@ -0,0 +1,61 @@
//
// Created by Marc Rousavy on 31.08.23.
//
#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS && VISION_CAMERA_ENABLE_SKIA
#include "JSkiaFrameProcessor.h"
#include <jni.h>
#include <fbjni/fbjni.h>
#include <utility>
#include "JFrame.h"
#include "DrawableFrameHostObject.h"
#include <RNSkPlatformContext.h>
#include "VisionCameraSkiaContext.h"
namespace vision {
using namespace facebook;
using namespace jni;
void JSkiaFrameProcessor::registerNatives() {
}
using TSelf = jni::local_ref<JSkiaFrameProcessor::javaobject>;
JSkiaFrameProcessor::JSkiaFrameProcessor(const std::shared_ptr<RNWorklet::JsiWorklet>& worklet,
const std::shared_ptr<RNWorklet::JsiWorkletContext>& context,
const std::shared_ptr<react::CallInvoker>& callInvoker)
: JSkiaFrameProcessor::HybridBase(worklet, context) {
// TODO: Can I use the Android Platform Context from react-native-skia here?
auto skiaPlatformContext = std::make_shared<VisionCameraSkiaContext>(context->getJsRuntime(),
callInvoker,
1.0f);
_jsiCanvas = std::make_shared<RNSkia::JsiSkCanvas>(skiaPlatformContext);
_skiaRenderer = std::make_shared<SkiaRenderer>();
}
TSelf JSkiaFrameProcessor::create(const std::shared_ptr<RNWorklet::JsiWorklet>& worklet,
const std::shared_ptr<RNWorklet::JsiWorkletContext>& context,
const std::shared_ptr<react::CallInvoker>& callInvoker) {
return JSkiaFrameProcessor::newObjectCxxArgs(worklet, context, callInvoker);
}
void JSkiaFrameProcessor::call(alias_ref<JFrame::javaobject> frame,
SkCanvas* canvas) {
// Create the Frame Host Object wrapping the internal Frame and Skia Canvas
_jsiCanvas->setCanvas(canvas);
auto frameHostObject = std::make_shared<DrawableFrameHostObject>(frame, _jsiCanvas);
// Call the base function in JFrameProcessor
callWithFrameHostObject(frameHostObject);
// Remove Skia Canvas from Host Object because it is no longer valid
frameHostObject->invalidateCanvas();
}
} // namespace vision
#endif

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android/src/main/cpp/skia/JSkiaFrameProcessor.h Normal file
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@ -0,0 +1,59 @@
//
// Created by Marc Rousavy on 31.08.23.
//
#pragma once
#if VISION_CAMERA_ENABLE_FRAME_PROCESSORS && VISION_CAMERA_ENABLE_SKIA
#include <string>
#include <memory>
#include <jni.h>
#include <fbjni/fbjni.h>
#include <react-native-worklets-core/WKTJsiWorklet.h>
#include <react-native-worklets-core/WKTJsiHostObject.h>
#include "JFrame.h"
#include "FrameHostObject.h"
#include "SkiaRenderer.h"
#include "JFrameProcessor.h"
#include <JsiSkCanvas.h>
#include <RNSkPlatformContext.h>
namespace vision {
using namespace facebook;
class JSkiaFrameProcessor : public jni::HybridClass<JSkiaFrameProcessor, JFrameProcessor> {
public:
static auto constexpr kJavaDescriptor = "Lcom/mrousavy/camera/skia/SkiaFrameProcessor;";
static void registerNatives();
static jni::local_ref<JSkiaFrameProcessor::javaobject> create(const std::shared_ptr<RNWorklet::JsiWorklet>& worklet,
const std::shared_ptr<RNWorklet::JsiWorkletContext>& context,
const std::shared_ptr<react::CallInvoker>& callInvoker);
public:
/**
* Call the JS Frame Processor with the given valid Canvas to draw on.
*/
void call(jni::alias_ref<JFrame::javaobject> frame,
SkCanvas* canvas);
SkiaRenderer& getSkiaRenderer() { return *_skiaRenderer; }
protected:
friend HybridBase;
// Private constructor. Use `create(..)` to create new instances.
explicit JSkiaFrameProcessor(const std::shared_ptr<RNWorklet::JsiWorklet>& worklet,
const std::shared_ptr<RNWorklet::JsiWorkletContext>& context,
const std::shared_ptr<react::CallInvoker>& callInvoker);
private:
std::shared_ptr<RNSkia::JsiSkCanvas> _jsiCanvas;
std::shared_ptr<SkiaRenderer> _skiaRenderer;
};
} // namespace vision
#endif

417
android/src/main/cpp/skia/SkiaRenderer.cpp
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@ -8,6 +8,8 @@
#include <android/log.h>
#include "OpenGLError.h"
#include <GLES2/gl2ext.h>
#include <core/SkColorSpace.h>
#include <core/SkCanvas.h>
#include <core/SkYUVAPixmaps.h>
@ -22,308 +24,209 @@
#include <android/surface_texture_jni.h>
// from <gpu/ganesh/gl/GrGLDefines.h>
#define GR_GL_TEXTURE_EXTERNAL 0x8D65
#define GR_GL_RGBA8 0x8058
#define ACTIVE_SURFACE_ID 0
#define DEFAULT_FBO 0
namespace vision {
jni::local_ref<SkiaRenderer::jhybriddata> SkiaRenderer::initHybrid(jni::alias_ref<jhybridobject> javaPart) {
return makeCxxInstance(javaPart);
}
SkiaRenderer::SkiaRenderer(const jni::alias_ref<jhybridobject>& javaPart) {
_javaPart = jni::make_global(javaPart);
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing SkiaRenderer...");
_previewSurface = nullptr;
_previewWidth = 0;
_previewHeight = 0;
_inputSurfaceTextureId = NO_INPUT_TEXTURE;
}
SkiaRenderer::~SkiaRenderer() {
if (_glDisplay != EGL_NO_DISPLAY) {
eglMakeCurrent(_glDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
if (_glSurface != EGL_NO_SURFACE) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Destroying OpenGL Surface...");
eglDestroySurface(_glDisplay, _glSurface);
_glSurface = EGL_NO_SURFACE;
}
if (_glContext != EGL_NO_CONTEXT) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Destroying OpenGL Context...");
eglDestroyContext(_glDisplay, _glContext);
_glContext = EGL_NO_CONTEXT;
}
__android_log_print(ANDROID_LOG_INFO, TAG, "Destroying OpenGL Display...");
eglTerminate(_glDisplay);
_glDisplay = EGL_NO_DISPLAY;
}
_offscreenSurface = nullptr;
_offscreenSurfaceTextureId = NO_TEXTURE;
// 3. Delete the Skia context
if (_skiaContext != nullptr) {
_skiaContext->abandonContext();
_skiaContext = nullptr;
}
destroyOutputSurface();
}
void SkiaRenderer::ensureOpenGL(ANativeWindow* surface) {
bool successful;
// EGLDisplay
if (_glDisplay == EGL_NO_DISPLAY) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing EGLDisplay..");
_glDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
if (_glDisplay == EGL_NO_DISPLAY) throw OpenGLError("Failed to get default OpenGL Display!");
EGLint major;
EGLint minor;
successful = eglInitialize(_glDisplay, &major, &minor);
if (!successful) throw OpenGLError("Failed to initialize OpenGL!");
}
// EGLConfig
if (_glConfig == nullptr) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing EGLConfig..");
EGLint attributes[] = {EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_ALPHA_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_RED_SIZE, 8,
EGL_DEPTH_SIZE, 0,
EGL_STENCIL_SIZE, 0,
EGL_NONE};
EGLint numConfigs;
successful = eglChooseConfig(_glDisplay, attributes, &_glConfig, 1, &numConfigs);
if (!successful || numConfigs == 0) throw OpenGLError("Failed to choose OpenGL config!");
}
// EGLContext
if (_glContext == EGL_NO_CONTEXT) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing EGLContext..");
EGLint contextAttributes[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
_glContext = eglCreateContext(_glDisplay, _glConfig, nullptr, contextAttributes);
if (_glContext == EGL_NO_CONTEXT) throw OpenGLError("Failed to create OpenGL context!");
}
// EGLSurface
if (_glSurface == EGL_NO_SURFACE) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Initializing EGLSurface..");
_glSurface = eglCreateWindowSurface(_glDisplay, _glConfig, surface, nullptr);
_skiaContext = GrDirectContext::MakeGL();
}
successful = eglMakeCurrent(_glDisplay, _glSurface, _glSurface, _glContext);
if (!successful || eglGetError() != EGL_SUCCESS) throw OpenGLError("Failed to use current OpenGL context!");
}
void SkiaRenderer::setOutputSurface(jobject previewSurface) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Setting Output Surface..");
destroyOutputSurface();
_previewSurface = ANativeWindow_fromSurface(jni::Environment::current(), previewSurface);
_glSurface = EGL_NO_SURFACE;
}
void SkiaRenderer::destroyOutputSurface() {
__android_log_print(ANDROID_LOG_INFO, TAG, "Destroying Output Surface..");
if (_glSurface != EGL_NO_SURFACE) {
eglDestroySurface(_glDisplay, _glSurface);
_glSurface = EGL_NO_SURFACE;
if (_skiaContext != nullptr) {
_skiaContext->abandonContext();
_skiaContext = nullptr;
}
}
if (_previewSurface != nullptr) {
ANativeWindow_release(_previewSurface);
_previewSurface = nullptr;
}
}
void SkiaRenderer::setOutputSurfaceSize(int width, int height) {
_previewWidth = width;
_previewHeight = height;
}
void SkiaRenderer::setInputTextureSize(int width, int height) {
_inputWidth = width;
_inputHeight = height;
}
void SkiaRenderer::renderLatestFrameToPreview() {
__android_log_print(ANDROID_LOG_INFO, TAG, "renderLatestFrameToPreview()");
if (_previewSurface == nullptr) {
throw std::runtime_error("Cannot render latest frame to preview without a preview surface! "
"renderLatestFrameToPreview() needs to be called after setPreviewSurface().");
}
return;
if (_inputSurfaceTextureId == NO_INPUT_TEXTURE) {
throw std::runtime_error("Cannot render latest frame to preview without an input texture! "
"renderLatestFrameToPreview() needs to be called after prepareInputTexture().");
}
ensureOpenGL(_previewSurface);
sk_sp<GrDirectContext> SkiaRenderer::getSkiaContext() {
if (_skiaContext == nullptr) {
_skiaContext = GrDirectContext::MakeGL();
}
_skiaContext->resetContext();
return _skiaContext;
}
sk_sp<SkImage> SkiaRenderer::wrapTextureAsImage(OpenGLTexture &texture) {
GrGLTextureInfo textureInfo {
// OpenGL will automatically convert YUV -> RGB because it's an EXTERNAL texture
.fTarget = GR_GL_TEXTURE_EXTERNAL,
.fID = _inputSurfaceTextureId,
// OpenGL will automatically convert YUV -> RGB - if it's an EXTERNAL texture
.fTarget = texture.target,
.fID = texture.id,
.fFormat = GR_GL_RGBA8,
.fProtected = skgpu::Protected::kNo,
};
GrBackendTexture texture(_inputWidth,
_inputHeight,
GrBackendTexture skiaTexture(texture.width,
texture.height,
GrMipMapped::kNo,
textureInfo);
sk_sp<SkImage> frame = SkImages::AdoptTextureFrom(_skiaContext.get(),
texture,
kTopLeft_GrSurfaceOrigin,
sk_sp<SkImage> image = SkImages::BorrowTextureFrom(_skiaContext.get(),
skiaTexture,
kBottomLeft_GrSurfaceOrigin,
kN32_SkColorType,
kOpaque_SkAlphaType);
kOpaque_SkAlphaType,
nullptr,
nullptr);
if (image == nullptr) {
[[unlikely]];
throw std::runtime_error("Failed to create Skia Image! Cannot wrap input texture (frame) using Skia.");
}
return image;
}
sk_sp<SkSurface> SkiaRenderer::wrapEglSurfaceAsSurface(EGLSurface eglSurface) {
GLint sampleCnt;
glGetIntegerv(GL_SAMPLES, &sampleCnt);
GLint stencilBits;
glGetIntegerv(GL_STENCIL_BITS, &stencilBits);
GrGLFramebufferInfo fboInfo {
// FBO #0 is the currently active OpenGL Surface (eglMakeCurrent)
.fFBOID = ACTIVE_SURFACE_ID,
.fFormat = GR_GL_RGBA8,
.fProtected = skgpu::Protected::kNo,
};;
GrBackendRenderTarget renderTarget(_previewWidth,
_previewHeight,
0,
8,
// DEFAULT_FBO is FBO0, meaning the default on-screen FBO for that given surface
.fFBOID = DEFAULT_FBO,
.fFormat = GR_GL_RGBA8
};
EGLint width = 0, height = 0;
eglQuerySurface(eglGetCurrentDisplay(), eglSurface, EGL_WIDTH, &width);
eglQuerySurface(eglGetCurrentDisplay(), eglSurface, EGL_HEIGHT, &height);
GrBackendRenderTarget renderTarget(width,
height,
sampleCnt,
stencilBits,
fboInfo);
SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
sk_sp<SkSurface> surface = SkSurfaces::WrapBackendRenderTarget(_skiaContext.get(),
renderTarget,
kTopLeft_GrSurfaceOrigin,
kBottomLeft_GrSurfaceOrigin,
kN32_SkColorType,
nullptr,
&props);
&props,
nullptr,
nullptr);
if (surface == nullptr) {
[[unlikely]];
throw std::runtime_error("Failed to create Skia Surface! Cannot wrap EGLSurface/FrameBuffer using Skia.");
}
return surface;
}
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendering %ix%i Frame to %ix%i Preview..", frame->width(), frame->height(), surface->width(), surface->height());
sk_sp<SkSurface> SkiaRenderer::getOffscreenSurface(int width, int height) {
if (_offscreenSurface == nullptr || _offscreenSurface->width() != width || _offscreenSurface->height() != height) {
// 1. Get Skia Context
sk_sp<GrDirectContext> skiaContext = getSkiaContext();
auto canvas = surface->getCanvas();
// 2. Create a backend texture (TEXTURE_2D + Frame Buffer)
GrBackendTexture backendTexture = skiaContext->createBackendTexture(width,
height,
SkColorType::kN32_SkColorType,
GrMipMapped::kNo,
GrRenderable::kYes);
// 3. Get it's Texture ID
GrGLTextureInfo info;
backendTexture.getGLTextureInfo(&info);
_offscreenSurfaceTextureId = info.fID;
struct ReleaseContext {
GrDirectContext* context;
GrBackendTexture texture;
};
auto releaseCtx = new ReleaseContext(
{skiaContext.get(), backendTexture});
SkSurfaces::TextureReleaseProc releaseProc = [] (void* address) {
// 5. Once done using, delete the backend OpenGL texture.
auto releaseCtx = reinterpret_cast<ReleaseContext*>(address);
releaseCtx->context->deleteBackendTexture(releaseCtx->texture);
};
// 4. Wrap the newly created texture as an SkSurface
SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
_offscreenSurface = SkSurfaces::WrapBackendTexture(skiaContext.get(),
backendTexture,
kBottomLeft_GrSurfaceOrigin,
0,
SkColorType::kN32_SkColorType,
nullptr,
&props,
releaseProc,
releaseCtx);
if (_offscreenSurface == nullptr) {
[[unlikely]];
throw std::runtime_error("Failed to create offscreen Skia Surface!");
}
}
return _offscreenSurface;
}
OpenGLTexture SkiaRenderer::renderTextureToOffscreenSurface(OpenGLContext& glContext,
OpenGLTexture& texture,
float* transformMatrix,
const DrawCallback& drawCallback) {
// 1. Activate the OpenGL context (eglMakeCurrent)
glContext.use();
// 2. Initialize Skia
sk_sp<GrDirectContext> skiaContext = getSkiaContext();
// 3. Create the offscreen Skia Surface
sk_sp<SkSurface> surface = getOffscreenSurface(texture.width, texture.height);
// 4. Wrap the input texture as an image so we can draw it to the surface
sk_sp<SkImage> frame = wrapTextureAsImage(texture);
// 5. Prepare the Canvas
SkCanvas* canvas = _offscreenSurface->getCanvas();
if (canvas == nullptr) {
[[unlikely]];
throw std::runtime_error("Failed to get Skia Canvas!");
}
// TODO: Apply Matrix. No idea how though.
SkM44 matrix = SkM44::ColMajor(transformMatrix);
// 6. Render it!
canvas->clear(SkColors::kBlack);
auto duration = std::chrono::system_clock::now().time_since_epoch();
auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
canvas->drawImage(frame, 0, 0);
// TODO: Run Skia Frame Processor
auto rect = SkRect::MakeXYWH(150, 250, millis % 3000 / 10, millis % 3000 / 10);
auto paint = SkPaint();
paint.setColor(SkColors::kRed);
canvas->drawRect(rect, paint);
drawCallback(canvas);
// Flush
canvas->flush();
// 8. Flush all Skia operations to OpenGL
_offscreenSurface->flushAndSubmit();
bool successful = eglSwapBuffers(_glDisplay, _glSurface);
if (!successful || eglGetError() != EGL_SUCCESS) throw OpenGLError("Failed to swap OpenGL buffers!");
return OpenGLTexture {
.id = _offscreenSurfaceTextureId,
.target = GL_TEXTURE_2D,
.width = texture.width,
.height = texture.height,
};
}
void SkiaRenderer::renderTextureToSurface(OpenGLContext &glContext, OpenGLTexture &texture, EGLSurface surface) {
// 1. Activate the OpenGL context (eglMakeCurrent)
glContext.use(surface);
void SkiaRenderer::renderCameraFrameToOffscreenCanvas(jni::JByteBuffer yBuffer,
jni::JByteBuffer uBuffer,
jni::JByteBuffer vBuffer) {
__android_log_print(ANDROID_LOG_INFO, TAG, "Begin render...");
ensureOpenGL(_previewSurface);
if (_skiaContext == nullptr) {
_skiaContext = GrDirectContext::MakeGL();
// 2. Initialize Skia
sk_sp<GrDirectContext> skiaContext = getSkiaContext();
// 3. Wrap the output EGLSurface in a Skia SkSurface
sk_sp<SkSurface> skSurface = wrapEglSurfaceAsSurface(surface);
// 4. Wrap the input texture in a Skia SkImage
sk_sp<SkImage> frame = wrapTextureAsImage(texture);
// 5. Prepare the Canvas!
SkCanvas* canvas = skSurface->getCanvas();
if (canvas == nullptr) {
[[unlikely]];
throw std::runtime_error("Failed to get Skia Canvas!");
}
_skiaContext->resetContext();
// See https://en.wikipedia.org/wiki/Chroma_subsampling - we're in 4:2:0
size_t bytesPerRow = sizeof(uint8_t) * _inputWidth;
SkImageInfo yInfo = SkImageInfo::MakeA8(_inputWidth, _inputHeight);
SkPixmap yPixmap(yInfo, yBuffer.getDirectAddress(), bytesPerRow);
SkImageInfo uInfo = SkImageInfo::MakeA8(_inputWidth / 2, _inputHeight / 2);
SkPixmap uPixmap(uInfo, uBuffer.getDirectAddress(), bytesPerRow / 2);
SkImageInfo vInfo = SkImageInfo::MakeA8(_inputWidth / 2, _inputHeight / 2);
SkPixmap vPixmap(vInfo, vBuffer.getDirectAddress(), bytesPerRow / 2);
SkYUVAInfo info(SkISize::Make(_inputWidth, _inputHeight),
SkYUVAInfo::PlaneConfig::kY_U_V,
SkYUVAInfo::Subsampling::k420,
SkYUVColorSpace::kRec709_Limited_SkYUVColorSpace);
SkPixmap externalPixmaps[3] = { yPixmap, uPixmap, vPixmap };
SkYUVAPixmaps pixmaps = SkYUVAPixmaps::FromExternalPixmaps(info, externalPixmaps);
sk_sp<SkImage> image = SkImages::TextureFromYUVAPixmaps(_skiaContext.get(), pixmaps);
GrGLFramebufferInfo fboInfo {
// FBO #0 is the currently active OpenGL Surface (eglMakeCurrent)
.fFBOID = ACTIVE_SURFACE_ID,
.fFormat = GR_GL_RGBA8,
.fProtected = skgpu::Protected::kNo,
};;
GrBackendRenderTarget renderTarget(_previewWidth,
_previewHeight,
0,
8,
fboInfo);
SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
sk_sp<SkSurface> surface = SkSurfaces::WrapBackendRenderTarget(_skiaContext.get(),
renderTarget,
kTopLeft_GrSurfaceOrigin,
kN32_SkColorType,
nullptr,
&props);
auto canvas = surface->getCanvas();
// 6. Render it!
canvas->clear(SkColors::kBlack);
canvas->drawImage(frame, 0, 0);
auto duration = std::chrono::system_clock::now().time_since_epoch();
auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
// 7. Flush all Skia operations to OpenGL
skSurface->flushAndSubmit();
canvas->drawImage(image, 0, 0);
// TODO: Run Skia Frame Processor
auto rect = SkRect::MakeXYWH(150, 250, millis % 3000 / 10, millis % 3000 / 10);
auto paint = SkPaint();
paint.setColor(SkColors::kRed);
canvas->drawRect(rect, paint);
// Flush
canvas->flush();
bool successful = eglSwapBuffers(_glDisplay, _glSurface);
if (!successful || eglGetError() != EGL_SUCCESS) throw OpenGLError("Failed to swap OpenGL buffers!");
__android_log_print(ANDROID_LOG_INFO, TAG, "Rendered!");
}
void SkiaRenderer::registerNatives() {
registerHybrid({
makeNativeMethod("initHybrid", SkiaRenderer::initHybrid),
makeNativeMethod("setInputTextureSize", SkiaRenderer::setInputTextureSize),
makeNativeMethod("setOutputSurface", SkiaRenderer::setOutputSurface),
makeNativeMethod("destroyOutputSurface", SkiaRenderer::destroyOutputSurface),
makeNativeMethod("setOutputSurfaceSize", SkiaRenderer::setOutputSurfaceSize),
makeNativeMethod("renderLatestFrameToPreview", SkiaRenderer::renderLatestFrameToPreview),
makeNativeMethod("renderCameraFrameToOffscreenCanvas", SkiaRenderer::renderCameraFrameToOffscreenCanvas),
});
// 8. Swap the buffers so the onscreen surface gets updated.
glContext.flush();
}
} // namespace vision

89
android/src/main/cpp/skia/SkiaRenderer.h
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@ -6,72 +6,63 @@
#if VISION_CAMERA_ENABLE_SKIA
#include <jni.h>
#include <fbjni/fbjni.h>
#include <fbjni/ByteBuffer.h>
#include <GLES2/gl2.h>
#include <EGL/egl.h>
#include <include/core/SkSurface.h>
#include <android/native_window.h>
#include <include/core/SkSurface.h>
#include <include/gpu/GrDirectContext.h>
#include "OpenGLContext.h"
#include "OpenGLTexture.h"
namespace vision {
using namespace facebook;
#define NO_TEXTURE 0
#define NO_INPUT_TEXTURE 7654321
using DrawCallback = std::function<void(SkCanvas*)>;
class SkiaRenderer: public jni::HybridClass<SkiaRenderer> {
// JNI Stuff
class SkiaRenderer {
public:
static auto constexpr kJavaDescriptor = "Lcom/mrousavy/camera/skia/SkiaRenderer;";
static void registerNatives();
private:
friend HybridBase;
jni::global_ref<SkiaRenderer::javaobject> _javaPart;
explicit SkiaRenderer(const jni::alias_ref<jhybridobject>& javaPart);
public:
static jni::local_ref<jhybriddata> initHybrid(jni::alias_ref<jhybridobject> javaPart);
/**
* Create a new Skia renderer. You need to use OpenGL outside of this context to make sure the
* Skia renderer can use the global OpenGL context.
*/
explicit SkiaRenderer() {};
~SkiaRenderer();
private:
// Input Texture (Camera)
void setInputTextureSize(int width, int height);
// Output Surface (Preview)
void setOutputSurface(jobject previewSurface);
void destroyOutputSurface();
void setOutputSurfaceSize(int width, int height);
/**
* Renders the given Texture (might be a Camera Frame) to a cached offscreen Texture using Skia.
*
* @returns The texture that was rendered to.
*/
OpenGLTexture renderTextureToOffscreenSurface(OpenGLContext& glContext,
OpenGLTexture& texture,
float* transformMatrix,
const DrawCallback& drawCallback);
/**
* Renders the latest Camera Frame from the Input Texture onto the Preview Surface. (60 FPS)
* Renders the given texture to the target output surface using Skia.
*/
void renderLatestFrameToPreview();
/**
* Renders the latest Camera Frame into it's Input Texture and run the Skia Frame Processor (1..240 FPS)
*/
void renderCameraFrameToOffscreenCanvas(jni::JByteBuffer yBuffer,
jni::JByteBuffer uBuffer,
jni::JByteBuffer vBuffer);
void renderTextureToSurface(OpenGLContext& glContext,
OpenGLTexture& texture,
EGLSurface surface);
private:
// Gets or creates the Skia context.
sk_sp<GrDirectContext> getSkiaContext();
// Wraps a Texture as an SkImage allowing you to draw it
sk_sp<SkImage> wrapTextureAsImage(OpenGLTexture& texture);
// Wraps an EGLSurface as an SkSurface allowing you to draw into it
sk_sp<SkSurface> wrapEglSurfaceAsSurface(EGLSurface eglSurface);
// Gets or creates an off-screen surface that you can draw into
sk_sp<SkSurface> getOffscreenSurface(int width, int height);
private:
// OpenGL Context
EGLContext _glContext = EGL_NO_CONTEXT;
EGLDisplay _glDisplay = EGL_NO_DISPLAY;
EGLSurface _glSurface = EGL_NO_SURFACE;
EGLConfig _glConfig = nullptr;
// Skia Context
sk_sp<GrDirectContext> _skiaContext;
// Input Texture (Camera/Offscreen)
GLuint _inputSurfaceTextureId = NO_INPUT_TEXTURE;
int _inputWidth, _inputHeight;
// Output Texture (Surface/Preview)
ANativeWindow* _previewSurface;
int _previewWidth, _previewHeight;
void ensureOpenGL(ANativeWindow* surface);
sk_sp<GrDirectContext> _skiaContext = nullptr;
sk_sp<SkSurface> _offscreenSurface = nullptr;
GLuint _offscreenSurfaceTextureId = NO_TEXTURE;
static auto constexpr TAG = "SkiaRenderer";
};

8
android/src/main/cpp/skia/VisionCameraSkiaContext.cpp Normal file
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@ -0,0 +1,8 @@
//
// Created by Marc Rousavy on 31.08.23.
//
#include "VisionCameraSkiaContext.h"
namespace vision {
} // vision

52
android/src/main/cpp/skia/VisionCameraSkiaContext.h Normal file
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@ -0,0 +1,52 @@
//
// Created by Marc Rousavy on 31.08.23.
//
#pragma once
#include <jsi/jsi.h>
#include <RNSkPlatformContext.h>
namespace vision {
using namespace facebook;
class VisionCameraSkiaContext: public RNSkia::RNSkPlatformContext {
public:
VisionCameraSkiaContext(jsi::Runtime* runtime,
std::shared_ptr<react::CallInvoker> callInvoker,
float pixelDensity)
: RNSkia::RNSkPlatformContext(runtime, callInvoker, pixelDensity) { }
void raiseError(const std::exception &err) override {
throw std::runtime_error("VisionCameraSkiaContext Error: " + std::string(err.what()));
}
void performStreamOperation(
const std::string &sourceUri,
const std::function<void(std::unique_ptr<SkStreamAsset>)> &op) override {
throw std::runtime_error("VisionCameraSkiaContext::performStreamOperation is not yet implemented!");
}
sk_sp<SkSurface> makeOffscreenSurface(int width, int height) override {
throw std::runtime_error("VisionCameraSkiaContext::makeOffscreenSurface is not yet implemented!");
}
void runOnMainThread(std::function<void()> task) override {
throw std::runtime_error("VisionCameraSkiaContext::runOnMainThread is not yet implemented!");
}
sk_sp<SkImage> takeScreenshotFromViewTag(size_t tag) override {
throw std::runtime_error("VisionCameraSkiaContext::takeScreenshotFromViewTag is not yet implemented!");
}
void startDrawLoop() override {
throw std::runtime_error("VisionCameraSkiaContext::startDrawLoop is not yet implemented!");
}
void stopDrawLoop() override {
throw std::runtime_error("VisionCameraSkiaContext::stopDrawLoop is not yet implemented!");
}
};
} // namespace vision

4
android/src/main/java/com/mrousavy/camera/CameraSession.kt
View File

@ -200,8 +200,8 @@ class CameraSession(private val context: Context,
private fun updateVideoOutputs() {
val videoPipeline = outputs?.videoOutput?.videoPipeline ?: return
val previewOutput = outputs?.previewOutput
videoPipeline.setRecordingSessionOutput(this.recording)
videoPipeline.setFrameProcessorOutput(this.frameProcessor)
videoPipeline.setRecordingSessionOutput(recording)
videoPipeline.setFrameProcessorOutput(frameProcessor)
videoPipeline.setPreviewOutput(previewOutput?.surface)
}

35
android/src/main/java/com/mrousavy/camera/CameraView.kt
View File

@ -19,16 +19,12 @@ import com.mrousavy.camera.extensions.installHierarchyFitter
import com.mrousavy.camera.frameprocessor.FrameProcessor
import com.mrousavy.camera.parsers.Orientation
import com.mrousavy.camera.parsers.PixelFormat
import com.mrousavy.camera.parsers.PreviewType
import com.mrousavy.camera.parsers.Torch
import com.mrousavy.camera.parsers.VideoStabilizationMode
import com.mrousavy.camera.skia.SkiaPreviewView
import com.mrousavy.camera.skia.SkiaRenderer
import com.mrousavy.camera.utils.outputs.CameraOutputs
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import java.io.Closeable
//
// TODOs for the CameraView which are currently too hard to implement either because of CameraX' limitations, or my brain capacity.
@ -52,7 +48,7 @@ class CameraView(context: Context) : FrameLayout(context) {
companion object {
const val TAG = "CameraView"
private val propsThatRequirePreviewReconfiguration = arrayListOf("cameraId", "previewType")
private val propsThatRequirePreviewReconfiguration = arrayListOf("cameraId")
private val propsThatRequireSessionReconfiguration = arrayListOf("cameraId", "format", "photo", "video", "enableFrameProcessor", "pixelFormat")
private val propsThatRequireFormatReconfiguration = arrayListOf("fps", "hdr", "videoStabilizationMode", "lowLightBoost")
}
@ -75,7 +71,6 @@ class CameraView(context: Context) : FrameLayout(context) {
var videoStabilizationMode: VideoStabilizationMode? = null
var hdr: Boolean? = null // nullable bool
var lowLightBoost: Boolean? = null // nullable bool
var previewType: PreviewType = PreviewType.NONE
// other props
var isActive = false
var torch: Torch = Torch.OFF
@ -92,11 +87,10 @@ class CameraView(context: Context) : FrameLayout(context) {
private var previewView: View? = null
private var previewSurface: Surface? = null
private var skiaRenderer: SkiaRenderer? = null
internal var frameProcessor: FrameProcessor? = null
set(value) {
field = value
cameraSession.frameProcessor = frameProcessor
cameraSession.frameProcessor = value
}
private val inputOrientation: Orientation
@ -130,34 +124,17 @@ class CameraView(context: Context) : FrameLayout(context) {
}
private fun setupPreviewView() {
this.previewView?.let { previewView ->
removeView(previewView)
if (previewView is Closeable) previewView.close()
}
this.previewSurface = null
when (previewType) {
PreviewType.NONE -> {
// Do nothing.
}
PreviewType.NATIVE -> {
val cameraId = cameraId ?: throw NoCameraDeviceError()
this.previewView = NativePreviewView(context, cameraManager, cameraId) { surface ->
val cameraId = cameraId ?: return
val previewView = NativePreviewView(context, cameraManager, cameraId) { surface ->
previewSurface = surface
configureSession()
}
}
PreviewType.SKIA -> {
if (skiaRenderer == null) skiaRenderer = SkiaRenderer()
this.previewView = SkiaPreviewView(context, skiaRenderer!!)
configureSession()
}
}
this.previewView?.let { previewView ->
previewView.layoutParams = LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)
addView(previewView)
}
this.previewView = previewView
}
fun update(changedProps: ArrayList<String>) {
@ -218,8 +195,6 @@ class CameraView(context: Context) : FrameLayout(context) {
// TODO: Allow previewSurface to be null/none
val previewSurface = previewSurface ?: return
if (targetVideoSize != null) skiaRenderer?.setInputSurfaceSize(targetVideoSize.width, targetVideoSize.height)
val previewOutput = CameraOutputs.PreviewOutput(previewSurface)
val photoOutput = if (photo == true) {
CameraOutputs.PhotoOutput(targetPhotoSize)

9
android/src/main/java/com/mrousavy/camera/CameraViewManager.kt
View File

@ -7,7 +7,6 @@ import com.facebook.react.uimanager.ViewGroupManager
import com.facebook.react.uimanager.annotations.ReactProp
import com.mrousavy.camera.parsers.Orientation
import com.mrousavy.camera.parsers.PixelFormat
import com.mrousavy.camera.parsers.PreviewType
import com.mrousavy.camera.parsers.Torch
import com.mrousavy.camera.parsers.VideoStabilizationMode
@ -102,14 +101,6 @@ class CameraViewManager : ViewGroupManager<CameraView>() {
view.videoStabilizationMode = newMode
}
@ReactProp(name = "previewType")
fun setPreviewType(view: CameraView, previewType: String) {
val newMode = PreviewType.fromUnionValue(previewType)
if (view.previewType != newMode)
addChangedPropToTransaction(view, "previewType")
view.previewType = newMode
}
@ReactProp(name = "enableHighQualityPhotos")
fun setEnableHighQualityPhotos(view: CameraView, enableHighQualityPhotos: Boolean?) {
if (view.enableHighQualityPhotos != enableHighQualityPhotos)

187
android/src/main/java/com/mrousavy/camera/frameprocessor/Frame.java
View File

@ -1,147 +1,66 @@
package com.mrousavy.camera.frameprocessor;
import android.graphics.ImageFormat;
import android.media.Image;
import com.facebook.proguard.annotations.DoNotStrip;
import com.mrousavy.camera.parsers.PixelFormat;
import com.mrousavy.camera.parsers.Orientation;
import com.facebook.jni.HybridData;
import java.nio.ByteBuffer;
/** @noinspection JavaJniMissingFunction*/
public class Frame {
private final Image image;
private final boolean isMirrored;
private final long timestamp;
private final Orientation orientation;
private int refCount = 0;
private final HybridData mHybridData;
public Frame(Image image, long timestamp, Orientation orientation, boolean isMirrored) {
this.image = image;
this.timestamp = timestamp;
this.orientation = orientation;
this.isMirrored = isMirrored;
private Frame(HybridData hybridData) {
mHybridData = hybridData;
}
public Image getImage() {
return image;
@Override
protected void finalize() throws Throwable {
super.finalize();
mHybridData.resetNative();
}
@SuppressWarnings("unused")
@DoNotStrip
public int getWidth() {
return image.getWidth();
}
/**
* Get the width of the Frame, in it's sensor orientation. (in pixels)
*/
public native int getWidth();
/**
* Get the height of the Frame, in it's sensor orientation. (in pixels)
*/
public native int getHeight();
/**
* Get the number of bytes per row.
* * To get the number of components per pixel you can divide this with the Frame's width.
* * To get the total size of the byte buffer you can multiply this with the Frame's height.
*/
public native int getBytesPerRow();
/**
* Get the local timestamp of this Frame. This is always monotonically increasing for each Frame.
*/
public native long getTimestamp();
/**
* Get the Orientation of this Frame. The return value is the result of `Orientation.toUnionValue()`.
*/
public native String getOrientation();
/**
* Return whether this Frame is mirrored or not. Frames from the front-facing Camera are often mirrored.
*/
public native boolean getIsMirrored();
/**
* Get the pixel-format of this Frame. The return value is the result of `PixelFormat.toUnionValue()`.
*/
public native String getPixelFormat();
/**
* Get the actual backing pixel data of this Frame using a zero-copy C++ ByteBuffer.
*/
public native ByteBuffer getByteBuffer();
/**
* Get whether this Frame is still valid.
* A Frame is valid as long as it hasn't been closed by the Frame Processor Runtime Manager
* (either because it ran out of Frames in it's queue and needs to close old ones, or because
* a Frame Processor finished executing and you're still trying to hold onto this Frame in native)
*/
public native boolean getIsValid();
@SuppressWarnings("unused")
@DoNotStrip
public int getHeight() {
return image.getHeight();
}
@SuppressWarnings("unused")
@DoNotStrip
public boolean getIsValid() {
try {
// will throw an exception if the image is already closed
image.getCropRect();
// no exception thrown, image must still be valid.
return true;
} catch (Exception e) {
// exception thrown, image has already been closed.
return false;
}
}
@SuppressWarnings("unused")
@DoNotStrip
public boolean getIsMirrored() {
return isMirrored;
}
@SuppressWarnings("unused")
@DoNotStrip
public long getTimestamp() {
return timestamp;
}
@SuppressWarnings("unused")
@DoNotStrip
public String getOrientation() {
return orientation.getUnionValue();
}
@SuppressWarnings("unused")
@DoNotStrip
public String getPixelFormat() {
PixelFormat format = PixelFormat.Companion.fromImageFormat(image.getFormat());
return format.getUnionValue();
}
@SuppressWarnings("unused")
@DoNotStrip
public int getPlanesCount() {
return image.getPlanes().length;
}
@SuppressWarnings("unused")
@DoNotStrip
public int getBytesPerRow() {
return image.getPlanes()[0].getRowStride();
}
private static ByteBuffer byteArrayCache;
@SuppressWarnings("unused")
@DoNotStrip
public ByteBuffer toByteBuffer() {
switch (image.getFormat()) {
case ImageFormat.YUV_420_888:
ByteBuffer yBuffer = image.getPlanes()[0].getBuffer();
ByteBuffer uBuffer = image.getPlanes()[1].getBuffer();
ByteBuffer vBuffer = image.getPlanes()[2].getBuffer();
int ySize = yBuffer.remaining();
int uSize = uBuffer.remaining();
int vSize = vBuffer.remaining();
int totalSize = ySize + uSize + vSize;
if (byteArrayCache != null) byteArrayCache.rewind();
if (byteArrayCache == null || byteArrayCache.remaining() != totalSize) {
byteArrayCache = ByteBuffer.allocateDirect(totalSize);
}
byteArrayCache.put(yBuffer).put(uBuffer).put(vBuffer);
return byteArrayCache;
case ImageFormat.JPEG:
return image.getPlanes()[0].getBuffer();
default:
throw new RuntimeException("Cannot convert Frame with Format " + image.getFormat() + " to byte array!");
}
}
@SuppressWarnings("unused")
@DoNotStrip
public void incrementRefCount() {
synchronized (this) {
refCount++;
}
}
@SuppressWarnings("unused")
@DoNotStrip
public void decrementRefCount() {
synchronized (this) {
refCount--;
if (refCount <= 0) {
// If no reference is held on this Image, close it.
image.close();
}
}
}
@SuppressWarnings("unused")
@DoNotStrip
private void close() {
image.close();
}
private native void incrementRefCount();
private native void decrementRefCount();
private native void close();
}

10
android/src/main/java/com/mrousavy/camera/frameprocessor/FrameProcessor.java
View File

@ -8,15 +8,9 @@ import com.facebook.jni.HybridData;
import com.facebook.proguard.annotations.DoNotStrip;
/**
* Represents a JS Frame Processor
* Represents a JS Frame Processor. It's actual implementation is in NDK/C++.
*/
@SuppressWarnings("JavaJniMissingFunction") // we're using fbjni.
public final class FrameProcessor {
/**
* Call the JS Frame Processor function with the given Frame
*/
public native void call(Frame frame);
public class FrameProcessor {
@DoNotStrip
@Keep
private final HybridData mHybridData;

11
android/src/main/java/com/mrousavy/camera/skia/SkiaFrameProcessor.java Normal file
View File

@ -0,0 +1,11 @@
package com.mrousavy.camera.skia;
import com.facebook.jni.HybridData;
import com.mrousavy.camera.frameprocessor.FrameProcessor;
public class SkiaFrameProcessor extends FrameProcessor {
// Implementation is in JSkiaFrameProcessor.cpp
public SkiaFrameProcessor(HybridData hybridData) {
super(hybridData);
}
}

75
android/src/main/java/com/mrousavy/camera/skia/SkiaPreviewView.kt
View File

@ -1,75 +0,0 @@
package com.mrousavy.camera.skia
import android.annotation.SuppressLint
import android.content.Context
import android.util.Log
import android.view.Choreographer
import android.view.SurfaceHolder
import android.view.SurfaceView
import com.mrousavy.camera.extensions.postAndWait
@SuppressLint("ViewConstructor")
class SkiaPreviewView(context: Context,
private val skiaRenderer: SkiaRenderer): SurfaceView(context), SurfaceHolder.Callback {
companion object {
private const val TAG = "SkiaPreviewView"
}
private var isAlive = true
init {
holder.addCallback(this)
}
private fun startLooping(choreographer: Choreographer) {
choreographer.postFrameCallback {
synchronized(this) {
if (!isAlive) return@synchronized
Log.i(TAG, "tick..")
// Refresh UI (60 FPS)
skiaRenderer.onPreviewFrame()
startLooping(choreographer)
}
}
}
override fun surfaceCreated(holder: SurfaceHolder) {
synchronized(this) {
Log.i(TAG, "onSurfaceCreated(..)")
skiaRenderer.thread.postAndWait {
// Create C++ part (OpenGL/Skia context)
skiaRenderer.setPreviewSurface(holder.surface)
isAlive = true
// Start updating the Preview View (~60 FPS)
startLooping(Choreographer.getInstance())
}
}
}
override fun surfaceChanged(holder: SurfaceHolder, format: Int, w: Int, h: Int) {
synchronized(this) {
Log.i(TAG, "surfaceChanged($w, $h)")
skiaRenderer.thread.postAndWait {
// Update C++ OpenGL Surface size
skiaRenderer.setPreviewSurfaceSize(w, h)
}
}
}
override fun surfaceDestroyed(holder: SurfaceHolder) {
synchronized(this) {
isAlive = false
Log.i(TAG, "surfaceDestroyed(..)")
skiaRenderer.thread.postAndWait {
// Clean up C++ part (OpenGL/Skia context)
skiaRenderer.destroyPreviewSurface()
}
}
}
}

98
android/src/main/java/com/mrousavy/camera/skia/SkiaRenderer.kt
View File

@ -1,98 +0,0 @@
package com.mrousavy.camera.skia
import android.graphics.ImageFormat
import android.view.Surface
import com.facebook.jni.HybridData
import com.facebook.proguard.annotations.DoNotStrip
import com.mrousavy.camera.CameraQueues
import com.mrousavy.camera.frameprocessor.Frame
import java.io.Closeable
import java.nio.ByteBuffer
@Suppress("KotlinJniMissingFunction")
class SkiaRenderer: Closeable {
@DoNotStrip
private var mHybridData: HybridData
private var hasNewFrame = false
private var hasOutputSurface = false
val thread = CameraQueues.previewQueue.handler
init {
mHybridData = initHybrid()
}
override fun close() {
hasNewFrame = false
thread.post {
synchronized(this) {
destroyOutputSurface()
mHybridData.resetNative()
}
}
}
fun setPreviewSurface(surface: Surface) {
synchronized(this) {
setOutputSurface(surface)
hasOutputSurface = true
}
}
fun setPreviewSurfaceSize(width: Int, height: Int) {
synchronized(this) {
setOutputSurfaceSize(width, height)
}
}
fun destroyPreviewSurface() {
synchronized(this) {
destroyOutputSurface()
hasOutputSurface = false
}
}
fun setInputSurfaceSize(width: Int, height: Int) {
synchronized(this) {
setInputTextureSize(width, height)
}
}
/**
* Called on every Camera Frame (1..240 FPS)
*/
fun onCameraFrame(frame: Frame) {
synchronized(this) {
if (!hasOutputSurface) return
if (frame.image.format != ImageFormat.YUV_420_888) {
throw Error("Failed to render Camera Frame! Expected Image format #${ImageFormat.YUV_420_888} (ImageFormat.YUV_420_888), received #${frame.image.format}.")
}
val (y, u, v) = frame.image.planes
renderCameraFrameToOffscreenCanvas(y.buffer, u.buffer, v.buffer)
hasNewFrame = true
}
}
/**
* Called on every UI Frame (60 FPS)
*/
fun onPreviewFrame() {
synchronized(this) {
if (!hasOutputSurface) return
if (!hasNewFrame) return
renderLatestFrameToPreview()
hasNewFrame = false
}
}
private external fun initHybrid(): HybridData
private external fun renderCameraFrameToOffscreenCanvas(yBuffer: ByteBuffer,
uBuffer: ByteBuffer,
vBuffer: ByteBuffer)
private external fun renderLatestFrameToPreview()
private external fun setInputTextureSize(width: Int, height: Int)
private external fun setOutputSurface(surface: Any)
private external fun setOutputSurfaceSize(width: Int, height: Int)
private external fun destroyOutputSurface()
}

32
android/src/main/java/com/mrousavy/camera/utils/ImageCreator.kt Normal file
View File

@ -0,0 +1,32 @@
package com.mrousavy.camera.utils
import android.graphics.ImageFormat
import android.media.Image
import android.media.ImageReader
import android.media.ImageWriter
import java.io.Closeable
class ImageCreator(private val width: Int,
private val height: Int,
private val format: Int = ImageFormat.PRIVATE,
private val maxImages: Int = 3): Closeable {
private var imageReader: ImageReader? = null
private var imageWriter: ImageWriter? = null
override fun close() {
imageWriter?.close()
imageReader?.close()
}
fun createImage(): Image {
if (imageReader == null || imageWriter == null) {
imageWriter?.close()
imageReader?.close()
imageReader = ImageReader.newInstance(width, height, format, maxImages)
imageWriter = ImageWriter.newInstance(imageReader!!.surface, maxImages)
}
return imageWriter!!.dequeueInputImage()
}
}

5
android/src/main/java/com/mrousavy/camera/utils/RecordingSession.kt
View File

@ -41,7 +41,6 @@ class RecordingSession(context: Context,
val surface: Surface = MediaCodec.createPersistentInputSurface()
init {
outputFile = File.createTempFile("mrousavy", fileType.toExtension(), context.cacheDir)
Log.i(TAG, "Creating RecordingSession for ${outputFile.absolutePath}")
@ -54,7 +53,7 @@ class RecordingSession(context: Context,
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)
recorder.setOutputFile(outputFile.absolutePath)
recorder.setVideoEncodingBitRate(VIDEO_BIT_RATE)
recorder.setVideoSize(size.height, size.width)
recorder.setVideoSize(size.width, size.height)
if (fps != null) recorder.setVideoFrameRate(fps)
Log.i(TAG, "Using $codec Video Codec..")
@ -67,7 +66,7 @@ class RecordingSession(context: Context,
recorder.setAudioChannels(AUDIO_CHANNELS)
}
recorder.setInputSurface(surface)
//recorder.setOrientationHint(orientation.toDegrees())
recorder.setOrientationHint(orientation.toDegrees())
recorder.setOnErrorListener { _, what, extra ->
Log.e(TAG, "MediaRecorder Error: $what ($extra)")

58
android/src/main/java/com/mrousavy/camera/utils/VideoPipeline.kt
View File

@ -2,15 +2,12 @@ package com.mrousavy.camera.utils
import android.graphics.ImageFormat
import android.graphics.SurfaceTexture
import android.media.ImageReader
import android.media.ImageWriter
import android.media.MediaRecorder
import android.util.Log
import android.view.Surface
import com.facebook.jni.HybridData
import com.mrousavy.camera.frameprocessor.Frame
import com.mrousavy.camera.frameprocessor.FrameProcessor
import com.mrousavy.camera.parsers.Orientation
import java.io.Closeable
/**
@ -26,23 +23,24 @@ class VideoPipeline(val width: Int,
val height: Int,
val format: Int = ImageFormat.PRIVATE): SurfaceTexture.OnFrameAvailableListener, Closeable {
companion object {
private const val MAX_IMAGES = 5
private const val MAX_IMAGES = 3
private const val TAG = "VideoPipeline"
}
private val mHybridData: HybridData
private var openGLTextureId: Int? = null
private var transformMatrix = FloatArray(16)
private var isActive = true
// Output 1
private var frameProcessor: FrameProcessor? = null
private var imageReader: ImageReader? = null
// Input Texture
private var openGLTextureId: Int? = null
private var transformMatrix = FloatArray(16)
// Output 2
// Processing input texture
private var frameProcessor: FrameProcessor? = null
// Output 1
private var recordingSession: RecordingSession? = null
// Output 3
// Output 2
private var previewSurface: Surface? = null
// Input
@ -60,8 +58,6 @@ class VideoPipeline(val width: Int,
override fun close() {
synchronized(this) {
isActive = false
imageReader?.close()
imageReader = null
frameProcessor = null
recordingSession = null
surfaceTexture.release()
@ -94,21 +90,6 @@ class VideoPipeline(val width: Int,
}
}
private fun getImageReader(): ImageReader {
val imageReader = ImageReader.newInstance(width, height, format, MAX_IMAGES)
imageReader.setOnImageAvailableListener({ reader ->
Log.i("VideoPipeline", "ImageReader::onImageAvailable!")
val image = reader.acquireLatestImage() ?: return@setOnImageAvailableListener
// TODO: Get correct orientation and isMirrored
val frame = Frame(image, image.timestamp, Orientation.PORTRAIT, false)
frame.incrementRefCount()
frameProcessor?.call(frame)
frame.decrementRefCount()
}, null)
return imageReader
}
/**
* Configures the Pipeline to also call the given [FrameProcessor].
* * If the [frameProcessor] is `null`, this output channel will be removed.
@ -121,20 +102,11 @@ class VideoPipeline(val width: Int,
this.frameProcessor = frameProcessor
if (frameProcessor != null) {
if (this.imageReader == null) {
// 1. Create new ImageReader that just calls the Frame Processor
this.imageReader = getImageReader()
}
// 2. Configure OpenGL pipeline to stream Frames into the ImageReader's surface
setFrameProcessorOutputSurface(imageReader!!.surface)
// Configure OpenGL pipeline to stream Frames into the Frame Processor (CPU pixel access)
setFrameProcessor(frameProcessor)
} else {
// 1. Configure OpenGL pipeline to stop streaming Frames into the ImageReader's surface
removeFrameProcessorOutputSurface()
// 2. Close the ImageReader
this.imageReader?.close()
this.imageReader = null
// Configure OpenGL pipeline to stop streaming Frames into a Frame Processor
removeFrameProcessor()
}
}
}
@ -175,8 +147,8 @@ class VideoPipeline(val width: Int,
private external fun getInputTextureId(): Int
private external fun onBeforeFrame()
private external fun onFrame(transformMatrix: FloatArray)
private external fun setFrameProcessorOutputSurface(surface: Any)
private external fun removeFrameProcessorOutputSurface()
private external fun setFrameProcessor(frameProcessor: FrameProcessor)
private external fun removeFrameProcessor()
private external fun setRecordingSessionOutputSurface(surface: Any)
private external fun removeRecordingSessionOutputSurface()
private external fun setPreviewOutputSurface(surface: Any)

3
example/android/app/src/main/java/com/mrousavy/camera/example/ExampleFrameProcessorPlugin.java
View File

@ -17,9 +17,8 @@ public class ExampleFrameProcessorPlugin extends FrameProcessorPlugin {
@Override
public Object callback(@NotNull Frame frame, @Nullable Map<String, Object> params) {
if (params == null) return null;
Image image = frame.getImage();
Log.d("ExamplePlugin", image.getWidth() + " x " + image.getHeight() + " Image with format #" + image.getFormat() + ". Logging " + params.size() + " parameters:");
Log.d("ExamplePlugin", frame.getWidth() + " x " + frame.getHeight() + " Image with format #" + frame.getPixelFormat() + ". Logging " + params.size() + " parameters:");
for (String key : params.keySet()) {
Object value = params.get(key);

9
example/src/CameraPage.tsx
View File

@ -9,6 +9,7 @@ import {
sortFormats,
useCameraDevices,
useFrameProcessor,
useSkiaFrameProcessor,
VideoFile,
} from 'react-native-vision-camera';
import { Camera } from 'react-native-vision-camera';
@ -218,11 +219,15 @@ export function CameraPage({ navigation }: Props): React.ReactElement {
const paint = Skia.Paint();
paint.setImageFilter(imageFilter);
const frameProcessor = useFrameProcessor((frame) => {
const frameProcessor = useSkiaFrameProcessor((frame) => {
'worklet';
const rect = Skia.XYWHRect(150, 150, 300, 300);
const paint = Skia.Paint();
paint.setColor(Skia.Color('red'));
frame.drawRect(rect, paint);
console.log(frame.timestamp, frame.toString(), frame.pixelFormat);
examplePlugin(frame);
}, []);
return (

6
ios/Frame Processor/FrameHostObject.mm
View File

@ -18,7 +18,6 @@ std::vector<jsi::PropNameID> FrameHostObject::getPropertyNames(jsi::Runtime& rt)
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("width")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("height")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("bytesPerRow")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("planesCount")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("orientation")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("isMirrored")));
result.push_back(jsi::PropNameID::forUtf8(rt, std::string("timestamp")));
@ -176,11 +175,6 @@ jsi::Value FrameHostObject::get(jsi::Runtime& runtime, const jsi::PropNameID& pr
auto bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
return jsi::Value((double) bytesPerRow);
}
if (name == "planesCount") {
auto imageBuffer = CMSampleBufferGetImageBuffer(frame.buffer);
auto planesCount = CVPixelBufferGetPlaneCount(imageBuffer);
return jsi::Value((double) planesCount);
}
// fallback to base implementation
return HostObject::get(runtime, propName);

2
ios/Skia Render Layer/SkiaFrameProcessor.mm
View File

@ -39,7 +39,7 @@ using namespace facebook;
}
- (void)call:(Frame*)frame {
[_skiaRenderer renderCameraFrameToOffscreenCanvas:frame.buffer
[_skiaRenderer renderCameraFrameToOffscreenSurface:frame.buffer
withDrawCallback:^(SkiaCanvas _Nonnull canvas) {
// Create the Frame Host Object wrapping the internal Frame and Skia Canvas
self->_skiaCanvas->setCanvas(static_cast<SkCanvas*>(canvas));

2
ios/Skia Render Layer/SkiaRenderer.h
View File

@ -30,7 +30,7 @@ typedef void(^draw_callback_t)(SkiaCanvas _Nonnull);
The given callback will be executed with a reference to the Skia Canvas
for the user to perform draw operations on (in this case, through a JS Frame Processor)
*/
- (void)renderCameraFrameToOffscreenCanvas:(CMSampleBufferRef _Nonnull)sampleBuffer withDrawCallback:(draw_callback_t _Nonnull)callback;
- (void)renderCameraFrameToOffscreenSurface:(CMSampleBufferRef _Nonnull)sampleBuffer withDrawCallback:(draw_callback_t _Nonnull)callback;
/**
Renders the latest Frame to the onscreen Layer.
This should be called everytime you want the UI to update, e.g. for 60 FPS; every 16.66ms.

2
ios/Skia Render Layer/SkiaRenderer.mm
View File

@ -70,7 +70,7 @@
return _texture;
}
- (void)renderCameraFrameToOffscreenCanvas:(CMSampleBufferRef)sampleBuffer withDrawCallback:(draw_callback_t)callback {
- (void)renderCameraFrameToOffscreenSurface:(CMSampleBufferRef)sampleBuffer withDrawCallback:(draw_callback_t)callback {
// Wrap in auto release pool since we want the system to clean up after rendering
@autoreleasepool {
// Get the Frame's PixelBuffer

4
src/Frame.ts
View File

@ -22,10 +22,6 @@ export interface Frame {
* Returns the amount of bytes per row.
*/
bytesPerRow: number;
/**
* Returns the number of planes this frame contains.
*/
planesCount: number;
/**
* Returns whether the Frame is mirrored (selfie camera) or not.
*/